Revert "Fbson to Json"

This reverts commit 7ce1b2c19c.

include/rocksdb/utilities/json_document.h

@@ -5,27 +5,15 @@
 #pragma once
 #ifndef ROCKSDB_LITE
 
-#include <deque>
-#include <map>
-#include <memory>
 #include <string>
+#include <map>
 #include <unordered_map>
-#include <utility>
 #include <vector>
 
 #include "rocksdb/slice.h"
 
 // We use JSONDocument for DocumentDB API
-// Implementation inspired by folly::dynamic, rapidjson and fbson
+// Implementation inspired by folly::dynamic and rapidjson
-
-namespace fbson {
-  class FbsonValue;
-  class ObjectVal;
-  template <typename T>
-  class FbsonWriterT;
-  class FbsonOutStream;
-  typedef FbsonWriterT<FbsonOutStream> FbsonWriter;
-}  // namespace fbson
 
 namespace rocksdb {
 
@@ -45,38 +33,52 @@ class JSONDocument {
     kString,
   };
 
-  /* implicit */ JSONDocument();  // null
+  JSONDocument();  // null
   /* implicit */ JSONDocument(bool b);
   /* implicit */ JSONDocument(double d);
-  /* implicit */ JSONDocument(int8_t i);
-  /* implicit */ JSONDocument(int16_t i);
-  /* implicit */ JSONDocument(int32_t i);
   /* implicit */ JSONDocument(int64_t i);
   /* implicit */ JSONDocument(const std::string& s);
   /* implicit */ JSONDocument(const char* s);
   // constructs JSONDocument of specific type with default value
-  explicit JSONDocument(Type _type);
+  explicit JSONDocument(Type type);
 
+  // copy constructor
   JSONDocument(const JSONDocument& json_document);
 
-  JSONDocument(JSONDocument&& json_document);
+  ~JSONDocument();
 
   Type type() const;
 
   // REQUIRES: IsObject()
   bool Contains(const std::string& key) const;
+  // Returns nullptr if !Contains()
+  // don't delete the returned pointer
+  // REQUIRES: IsObject()
+  const JSONDocument* Get(const std::string& key) const;
+  // REQUIRES: IsObject()
+  JSONDocument& operator[](const std::string& key);
   // REQUIRES: IsObject()
-  // Returns non-owner object
+  const JSONDocument& operator[](const std::string& key) const;
-  JSONDocument operator[](const std::string& key) const;
+  // returns `this`, so you can chain operations.
+  // Copies value
+  // REQUIRES: IsObject()
+  JSONDocument* Set(const std::string& key, const JSONDocument& value);
 
   // REQUIRES: IsArray() == true || IsObject() == true
   size_t Count() const;
 
   // REQUIRES: IsArray()
-  // Returns non-owner object
+  const JSONDocument* GetFromArray(size_t i) const;
-  JSONDocument operator[](size_t i) const;
+  // REQUIRES: IsArray()
-
+  JSONDocument& operator[](size_t i);
-  JSONDocument& operator=(JSONDocument jsonDocument);
+  // REQUIRES: IsArray()
+  const JSONDocument& operator[](size_t i) const;
+  // returns `this`, so you can chain operations.
+  // Copies the value
+  // REQUIRES: IsArray() && i < Count()
+  JSONDocument* SetInArray(size_t i, const JSONDocument& value);
+  // REQUIRES: IsArray()
+  JSONDocument* PushBack(const JSONDocument& value);
 
   bool IsNull() const;
   bool IsArray() const;
@@ -93,16 +95,10 @@ class JSONDocument {
   // REQUIRES: IsInt64() == true
   int64_t GetInt64() const;
   // REQUIRES: IsString() == true
-  std::string GetString() const;
+  const std::string& GetString() const;
 
   bool operator==(const JSONDocument& rhs) const;
 
-  bool operator!=(const JSONDocument& rhs) const;
-
-  JSONDocument Copy() const;
-
-  bool IsOwner() const;
-
   std::string DebugString() const;
 
  private:
@@ -118,42 +114,53 @@ class JSONDocument {
   static JSONDocument* Deserialize(const Slice& src);
 
  private:
-  friend class JSONDocumentBuilder;
+  void SerializeInternal(std::string* dst, bool type_prefix) const;
+  // returns false if Slice doesn't represent valid serialized JSONDocument.
+  // Otherwise, true
+  bool DeserializeInternal(Slice* input);
 
-  JSONDocument(fbson::FbsonValue* val, bool makeCopy);
+  typedef std::vector<JSONDocument*> Array;
-
+  typedef std::unordered_map<std::string, JSONDocument*> Object;
-  void InitFromValue(const fbson::FbsonValue* val);
 
   // iteration on objects
   class const_item_iterator {
-   private:
-    class Impl;
    public:
-    typedef std::pair<std::string, JSONDocument> value_type;
+    typedef Object::const_iterator It;
-    /* implicit */ const_item_iterator(Impl* impl);
+    typedef Object::value_type value_type;
-    const_item_iterator(const_item_iterator&&);
+    /* implicit */ const_item_iterator(It it) : it_(it) {}
-    const_item_iterator& operator++();
+    It& operator++() { return ++it_; }
-    bool operator!=(const const_item_iterator& other);
+    bool operator!=(const const_item_iterator& other) {
-    value_type operator*();
+      return it_ != other.it_;
-    ~const_item_iterator();
+    }
+    value_type operator*() { return *it_; }
+
    private:
-    friend class ItemsIteratorGenerator;
+    It it_;
-    std::unique_ptr<Impl> it_;
   };
-
   class ItemsIteratorGenerator {
    public:
-    /* implicit */ ItemsIteratorGenerator(const fbson::ObjectVal& object);
+    /* implicit */ ItemsIteratorGenerator(const Object& object)
-    const_item_iterator begin() const;
+        : object_(object) {}
-
+    const_item_iterator begin() { return object_.begin(); }
-    const_item_iterator end() const;
+    const_item_iterator end() { return object_.end(); }
 
    private:
-    const fbson::ObjectVal& object_;
+    const Object& object_;
   };
 
-  std::unique_ptr<char[]> data_;
+  union Data {
-  mutable fbson::FbsonValue* value_;
+    Data() : n(nullptr) {}
+    ~Data() {}
+
+    void* n;
+    Array a;
+    bool b;
+    double d;
+    int64_t i;
+    std::string s;
+    Object o;
+  } data_;
+  const Type type_;
 
   // Our serialization format's first byte specifies the encoding version. That
   // way, we can easily change our format while providing backwards
@@ -162,34 +169,6 @@ class JSONDocument {
   static const char kSerializationFormatVersion;
 };
 
-class JSONDocumentBuilder {
- public:
-  JSONDocumentBuilder();
-
-  explicit JSONDocumentBuilder(fbson::FbsonOutStream* out);
-
-  void Reset();
-
-  bool WriteStartArray();
-
-  bool WriteEndArray();
-
-  bool WriteStartObject();
-
-  bool WriteEndObject();
-
-  bool WriteKeyValue(const std::string& key, const JSONDocument& value);
-
-  bool WriteJSONDocument(const JSONDocument& value);
-
-  JSONDocument GetJSONDocument();
-
-  ~JSONDocumentBuilder();
-
- private:
-  std::unique_ptr<fbson::FbsonWriter> writer_;
-};
-
 }  // namespace rocksdb
 
 #endif  // ROCKSDB_LITE

linters/lint_engine/FacebookFbcodeLintEngine.php

@@ -87,8 +87,7 @@ class FacebookFbcodeLintEngine extends ArcanistLintEngine {
         $spelling_linter->addPath($path);
         $spelling_linter->addData($path, $this->loadData($path));
       }
-      if (preg_match('/\.(cpp|c|cc|cxx|h|hh|hpp|hxx|tcc)$/', $path)
+      if (preg_match('/\.(cpp|c|cc|cxx|h|hh|hpp|hxx|tcc)$/', $path)) {
-          && !preg_match('/third-party/', $path)) {
         foreach ($cpp_linters as &$linter) {
           $linter->addPath($path);
           $linter->addData($path, $this->loadData($path));

third-party/fbson/FbsonDocument.h

@@ -1,768 +0,0 @@
-/*
- *  Copyright (c) 2014, Facebook, Inc.
- *  All rights reserved.
- *
- *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant
- *  of patent rights can be found in the PATENTS file in the same directory.
- *
- */
-
-/*
- * This header defines FbsonDocument, FbsonKeyValue, and various value classes
- * which are derived from FbsonValue, and a forward iterator for container
- * values - essentially everything that is related to FBSON binary data
- * structures.
- *
- * Implementation notes:
- *
- * None of the classes in this header file can be instantiated directly (i.e.
- * you cannot create a FbsonKeyValue or FbsonValue object - all constructors
- * are declared non-public). We use the classes as wrappers on the packed FBSON
- * bytes (serialized), and cast the classes (types) to the underlying packed
- * byte array.
- *
- * For the same reason, we cannot define any FBSON value class to be virtual,
- * since we never call constructors, and will not instantiate vtbl and vptrs.
- *
- * Therefore, the classes are defined as packed structures (i.e. no data
- * alignment and padding), and the private member variables of the classes are
- * defined precisely in the same order as the FBSON spec. This ensures we
- * access the packed FBSON bytes correctly.
- *
- * The packed structures are highly optimized for in-place operations with low
- * overhead. The reads (and in-place writes) are performed directly on packed
- * bytes. There is no memory allocation at all at runtime.
- *
- * For updates/writes of values that will expand the original FBSON size, the
- * write will fail, and the caller needs to handle buffer increase.
- *
- * ** Iterator **
- * Both ObjectVal class and ArrayVal class have iterator type that you can use
- * to declare an iterator on a container object to go through the key-value
- * pairs or value list. The iterator has both non-const and const types.
- *
- * Note: iterators are forward direction only.
- *
- * ** Query **
- * Querying into containers is through the member functions find (for key/value
- * pairs) and get (for array elements), and is in streaming style. We don't
- * need to read/scan the whole FBSON packed bytes in order to return results.
- * Once the key/index is found, we will stop search.  You can use text to query
- * both objects and array (for array, text will be converted to integer index),
- * and use index to retrieve from array. Array index is 0-based.
- *
- * ** External dictionary **
- * During query processing, you can also pass a call-back function, so the
- * search will first try to check if the key string exists in the dictionary.
- * If so, search will be based on the id instead of the key string.
- *
- * @author Tian Xia <tianx@fb.com>
- */
-#ifndef FBSON_FBSONDOCUMENT_H
-#define FBSON_FBSONDOCUMENT_H
-
-#ifndef ROCKSDB_LITE
-
-#include <string.h>
-#include <assert.h>
-
-namespace fbson {
-
-#pragma pack(push, 1)
-
-#define FBSON_VER 1
-
-// forward declaration
-class FbsonValue;
-class ObjectVal;
-
-/*
- * FbsonDocument is the main object that accesses and queries FBSON packed
- * bytes. NOTE: FbsonDocument only allows object container as the top level
- * FBSON value. However, you can use the static method "createValue" to get any
- * FbsonValue object from the packed bytes.
- *
- * FbsonDocument object also dereferences to an object container value
- * (ObjectVal) once FBSON is loaded.
- *
- * ** Load **
- * FbsonDocument is usable after loading packed bytes (memory location) into
- * the object. We only need the header and first few bytes of the payload after
- * header to verify the FBSON.
- *
- * Note: creating an FbsonDocument (through createDocument) does not allocate
- * any memory. The document object is an efficient wrapper on the packed bytes
- * which is accessed directly.
- *
- * ** Query **
- * Query is through dereferencing into ObjectVal.
- */
-class FbsonDocument {
- public:
-  // create an FbsonDocument object from FBSON packed bytes
-  static FbsonDocument *createDocument(const char *pb, uint32_t size);
-
-  // create an FbsonValue from FBSON packed bytes
-  static FbsonValue *createValue(const char *pb, uint32_t size);
-
-  uint8_t version() { return header_.ver_; }
-
-  FbsonValue *getValue() { return ((FbsonValue *)payload_); }
-
-  ObjectVal *operator->() { return ((ObjectVal *)payload_); }
-
-  const ObjectVal *operator->() const { return ((const ObjectVal *)payload_); }
-
- private:
-  /*
-   * FbsonHeader class defines FBSON header (internal to FbsonDocument).
-   *
-   * Currently it only contains version information (1-byte). We may expand the
-   * header to include checksum of the FBSON binary for more security.
-   */
-  struct FbsonHeader {
-    uint8_t ver_;
-  } header_;
-
-  char payload_[0];
-
-  FbsonDocument();
-};
-
-/*
- * FbsonFwdIteratorT implements FBSON's iterator template.
- *
- * Note: it is an FORWARD iterator only due to the design of FBSON format.
- */
-template <class Iter_Type, class Cont_Type>
-class FbsonFwdIteratorT {
-  typedef Iter_Type iterator;
-  typedef typename std::iterator_traits<Iter_Type>::pointer pointer;
-  typedef typename std::iterator_traits<Iter_Type>::reference reference;
-
- public:
-  explicit FbsonFwdIteratorT(const iterator &i) : current_(i) {}
-
-  // allow non-const to const iterator conversion (same container type)
-  template <class Iter_Ty>
-  FbsonFwdIteratorT(const FbsonFwdIteratorT<Iter_Ty, Cont_Type> &rhs)
-      : current_(rhs.base()) {}
-
-  bool operator==(const FbsonFwdIteratorT &rhs) const {
-    return (current_ == rhs.current_);
-  }
-
-  bool operator!=(const FbsonFwdIteratorT &rhs) const {
-    return !operator==(rhs);
-  }
-
-  bool operator<(const FbsonFwdIteratorT &rhs) const {
-    return (current_ < rhs.current_);
-  }
-
-  bool operator>(const FbsonFwdIteratorT &rhs) const { return !operator<(rhs); }
-
-  FbsonFwdIteratorT &operator++() {
-    current_ = (iterator)(((char *)current_) + current_->numPackedBytes());
-    return *this;
-  }
-
-  FbsonFwdIteratorT operator++(int) {
-    auto tmp = *this;
-    current_ = (iterator)(((char *)current_) + current_->numPackedBytes());
-    return tmp;
-  }
-
-  explicit operator pointer() { return current_; }
-
-  reference operator*() const { return *current_; }
-
-  pointer operator->() const { return current_; }
-
-  iterator base() const { return current_; }
-
- private:
-  iterator current_;
-};
-
-typedef int (*hDictInsert)(const char *key, unsigned len);
-typedef int (*hDictFind)(const char *key, unsigned len);
-
-/*
- * FbsonType defines 10 primitive types and 2 container types, as described
- * below.
- *
- * primitive_value ::=
- *   0x00        //null value (0 byte)
- * | 0x01        //boolean true (0 byte)
- * | 0x02        //boolean false (0 byte)
- * | 0x03 int8   //char/int8 (1 byte)
- * | 0x04 int16  //int16 (2 bytes)
- * | 0x05 int32  //int32 (4 bytes)
- * | 0x06 int64  //int64 (8 bytes)
- * | 0x07 double //floating point (8 bytes)
- * | 0x08 string //variable length string
- * | 0x09 binary //variable length binary
- *
- * container ::=
- *   0x0A int32 key_value_list //object, int32 is the total bytes of the object
- * | 0x0B int32 value_list     //array, int32 is the total bytes of the array
- */
-enum class FbsonType : char {
-  T_Null = 0x00,
-  T_True = 0x01,
-  T_False = 0x02,
-  T_Int8 = 0x03,
-  T_Int16 = 0x04,
-  T_Int32 = 0x05,
-  T_Int64 = 0x06,
-  T_Double = 0x07,
-  T_String = 0x08,
-  T_Binary = 0x09,
-  T_Object = 0x0A,
-  T_Array = 0x0B,
-  NUM_TYPES,
-};
-
-typedef std::underlying_type<FbsonType>::type FbsonTypeUnder;
-
-/*
- * FbsonKeyValue class defines FBSON key type, as described below.
- *
- * key ::=
- *   0x00 int8    //1-byte dictionary id
- * | int8 (byte*) //int8 (>0) is the size of the key string
- *
- * value ::= primitive_value | container
- *
- * FbsonKeyValue can be either an id mapping to the key string in an external
- * dictionary, or it is the original key string. Whether to read an id or a
- * string is decided by the first byte (size_).
- *
- * Note: a key object must be followed by a value object. Therefore, a key
- * object implicitly refers to a key-value pair, and you can get the value
- * object right after the key object. The function numPackedBytes hence
- * indicates the total size of the key-value pair, so that we will be able go
- * to next pair from the key.
- *
- * ** Dictionary size **
- * By default, the dictionary size is 255 (1-byte). Users can define
- * "USE_LARGE_DICT" to increase the dictionary size to 655535 (2-byte).
- */
-class FbsonKeyValue {
- public:
-#ifdef USE_LARGE_DICT
-  static const int sMaxKeyId = 65535;
-  typedef uint16_t keyid_type;
-#else
-  static const int sMaxKeyId = 255;
-  typedef uint8_t keyid_type;
-#endif // #ifdef USE_LARGE_DICT
-
-  static const uint8_t sMaxKeyLen = 64;
-
-  // size of the key. 0 indicates it is stored as id
-  uint8_t klen() const { return size_; }
-
-  // get the key string. Note the string may not be null terminated.
-  const char *getKeyStr() const { return key_.str_; }
-
-  keyid_type getKeyId() const { return key_.id_; }
-
-  unsigned int keyPackedBytes() const {
-    return size_ ? (sizeof(size_) + size_)
-                 : (sizeof(size_) + sizeof(keyid_type));
-  }
-
-  FbsonValue *value() const {
-    return (FbsonValue *)(((char *)this) + keyPackedBytes());
-  }
-
-  // size of the total packed bytes (key+value)
-  unsigned int numPackedBytes() const;
-
- private:
-  uint8_t size_;
-
-  union key_ {
-    keyid_type id_;
-    char str_[1];
-  } key_;
-
-  FbsonKeyValue();
-};
-
-/*
- * FbsonValue is the base class of all FBSON types. It contains only one member
- * variable - type info, which can be retrieved by member functions is[Type]()
- * or type().
- */
-class FbsonValue {
- public:
-  static const uint32_t sMaxValueLen = 1 << 24; // 16M
-
-  bool isNull() const { return (type_ == FbsonType::T_Null); }
-  bool isTrue() const { return (type_ == FbsonType::T_True); }
-  bool isFalse() const { return (type_ == FbsonType::T_False); }
-  bool isInt8() const { return (type_ == FbsonType::T_Int8); }
-  bool isInt16() const { return (type_ == FbsonType::T_Int16); }
-  bool isInt32() const { return (type_ == FbsonType::T_Int32); }
-  bool isInt64() const { return (type_ == FbsonType::T_Int64); }
-  bool isDouble() const { return (type_ == FbsonType::T_Double); }
-  bool isString() const { return (type_ == FbsonType::T_String); }
-  bool isBinary() const { return (type_ == FbsonType::T_Binary); }
-  bool isObject() const { return (type_ == FbsonType::T_Object); }
-  bool isArray() const { return (type_ == FbsonType::T_Array); }
-
-  FbsonType type() const { return type_; }
-
-  // size of the total packed bytes
-  unsigned int numPackedBytes() const;
-
-  // size of the value in bytes
-  unsigned int size() const;
-
-  // get the raw byte array of the value
-  const char *getValuePtr() const;
-
- protected:
-  FbsonType type_; // type info
-
-  FbsonValue();
-};
-
-/*
- * NumerValT is the template class (derived from FbsonValue) of all number
- * types (integers and double).
- */
-template <class T>
-class NumberValT : public FbsonValue {
- public:
-  T val() const { return num_; }
-
-  unsigned int numPackedBytes() const { return sizeof(FbsonValue) + sizeof(T); }
-
-  // catch all unknow specialization of the template class
-  bool setVal(T value) { return false; }
-
- private:
-  T num_;
-
-  NumberValT();
-};
-
-typedef NumberValT<int8_t> Int8Val;
-
-// override setVal for Int8Val
-template <>
-inline bool Int8Val::setVal(int8_t value) {
-  if (!isInt8()) {
-    return false;
-  }
-
-  num_ = value;
-  return true;
-}
-
-typedef NumberValT<int16_t> Int16Val;
-
-// override setVal for Int16Val
-template <>
-inline bool Int16Val::setVal(int16_t value) {
-  if (!isInt16()) {
-    return false;
-  }
-
-  num_ = value;
-  return true;
-}
-
-typedef NumberValT<int32_t> Int32Val;
-
-// override setVal for Int32Val
-template <>
-inline bool Int32Val::setVal(int32_t value) {
-  if (!isInt32()) {
-    return false;
-  }
-
-  num_ = value;
-  return true;
-}
-
-typedef NumberValT<int64_t> Int64Val;
-
-// override setVal for Int64Val
-template <>
-inline bool Int64Val::setVal(int64_t value) {
-  if (!isInt64()) {
-    return false;
-  }
-
-  num_ = value;
-  return true;
-}
-
-typedef NumberValT<double> DoubleVal;
-
-// override setVal for DoubleVal
-template <>
-inline bool DoubleVal::setVal(double value) {
-  if (!isDouble()) {
-    return false;
-  }
-
-  num_ = value;
-  return true;
-}
-
-/*
- * BlobVal is the base class (derived from FbsonValue) for string and binary
- * types. The size_ indicates the total bytes of the payload_.
- */
-class BlobVal : public FbsonValue {
- public:
-  // size of the blob payload only
-  unsigned int getBlobLen() const { return size_; }
-
-  // return the blob as byte array
-  const char *getBlob() const { return payload_; }
-
-  // size of the total packed bytes
-  unsigned int numPackedBytes() const {
-    return sizeof(FbsonValue) + sizeof(size_) + size_;
-  }
-
- protected:
-  uint32_t size_;
-  char payload_[0];
-
-  // set new blob bytes
-  bool internalSetVal(const char *blob, uint32_t blobSize) {
-    // if we cannot fit the new blob, fail the operation
-    if (blobSize > size_) {
-      return false;
-    }
-
-    memcpy(payload_, blob, blobSize);
-
-    // Set the reset of the bytes to 0.  Note we cannot change the size_ of the
-    // current payload, as all values are packed.
-    memset(payload_ + blobSize, 0, size_ - blobSize);
-
-    return true;
-  }
-
-  BlobVal();
-};
-
-/*
- * Binary type
- */
-class BinaryVal : public BlobVal {
- public:
-  bool setVal(const char *blob, uint32_t blobSize) {
-    if (!isBinary()) {
-      return false;
-    }
-
-    return internalSetVal(blob, blobSize);
-  }
-
- private:
-  BinaryVal();
-};
-
-/*
- * String type
- * Note: FBSON string may not be a c-string (NULL-terminated)
- */
-class StringVal : public BlobVal {
- public:
-  bool setVal(const char *str, uint32_t blobSize) {
-    if (!isString()) {
-      return false;
-    }
-
-    return internalSetVal(str, blobSize);
-  }
-
- private:
-  StringVal();
-};
-
-/*
- * ContainerVal is the base class (derived from FbsonValue) for object and
- * array types. The size_ indicates the total bytes of the payload_.
- */
-class ContainerVal : public FbsonValue {
- public:
-  // size of the container payload only
-  unsigned int getContainerSize() const { return size_; }
-
-  // return the container payload as byte array
-  const char *getPayload() const { return payload_; }
-
-  // size of the total packed bytes
-  unsigned int numPackedBytes() const {
-    return sizeof(FbsonValue) + sizeof(size_) + size_;
-  }
-
- protected:
-  uint32_t size_;
-  char payload_[0];
-
-  ContainerVal();
-};
-
-/*
- * Object type
- */
-class ObjectVal : public ContainerVal {
- public:
-  // find the FBSON value by a key string
-  FbsonValue *find(const char *key, hDictFind handler = nullptr) const {
-    int key_id = -1;
-    unsigned int klen = strlen(key);
-    if (handler && (key_id = handler(key, klen)) >= 0) {
-      return find(key_id);
-    }
-
-    const char *pch = payload_;
-    const char *fence = payload_ + size_;
-
-    while (pch < fence) {
-      FbsonKeyValue *pkey = (FbsonKeyValue *)(pch);
-      if (klen == pkey->klen() && strncmp(key, pkey->getKeyStr(), klen) == 0) {
-        return pkey->value();
-      }
-      pch += pkey->numPackedBytes();
-    }
-
-    assert(pch == fence);
-
-    return nullptr;
-  }
-
-  // find the FBSON value by a key dictionary ID
-  FbsonValue *find(int key_id) const {
-    if (key_id < 0 || key_id > FbsonKeyValue::sMaxKeyId)
-      return nullptr;
-
-    const char *pch = payload_;
-    const char *fence = payload_ + size_;
-
-    while (pch < fence) {
-      FbsonKeyValue *pkey = (FbsonKeyValue *)(pch);
-      if (!pkey->klen() && key_id == pkey->getKeyId()) {
-        return pkey->value();
-      }
-      pch += pkey->numPackedBytes();
-    }
-
-    assert(pch == fence);
-
-    return nullptr;
-  }
-
-  typedef FbsonKeyValue value_type;
-  typedef value_type *pointer;
-  typedef const value_type *const_pointer;
-  typedef FbsonFwdIteratorT<pointer, ObjectVal> iterator;
-  typedef FbsonFwdIteratorT<const_pointer, ObjectVal> const_iterator;
-
-  iterator begin() { return iterator((pointer)payload_); }
-
-  const_iterator begin() const { return const_iterator((pointer)payload_); }
-
-  iterator end() { return iterator((pointer)(payload_ + size_)); }
-
-  const_iterator end() const {
-    return const_iterator((pointer)(payload_ + size_));
-  }
-
- private:
-  ObjectVal();
-};
-
-/*
- * Array type
- */
-class ArrayVal : public ContainerVal {
- public:
-  // get the FBSON value at index
-  FbsonValue *get(int idx) const {
-    if (idx < 0)
-      return nullptr;
-
-    const char *pch = payload_;
-    const char *fence = payload_ + size_;
-
-    while (pch < fence && idx-- > 0)
-      pch += ((FbsonValue *)pch)->numPackedBytes();
-
-    if (idx == -1)
-      return (FbsonValue *)pch;
-    else {
-      assert(pch == fence);
-      return nullptr;
-    }
-  }
-
-  // Get number of elements in array
-  unsigned int numElem() const {
-    const char *pch = payload_;
-    const char *fence = payload_ + size_;
-
-    unsigned int num = 0;
-    while (pch < fence) {
-      ++num;
-      pch += ((FbsonValue *)pch)->numPackedBytes();
-    }
-
-    assert(pch == fence);
-
-    return num;
-  }
-
-  typedef FbsonValue value_type;
-  typedef value_type *pointer;
-  typedef const value_type *const_pointer;
-  typedef FbsonFwdIteratorT<pointer, ArrayVal> iterator;
-  typedef FbsonFwdIteratorT<const_pointer, ArrayVal> const_iterator;
-
-  iterator begin() { return iterator((pointer)payload_); }
-
-  const_iterator begin() const { return const_iterator((pointer)payload_); }
-
-  iterator end() { return iterator((pointer)(payload_ + size_)); }
-
-  const_iterator end() const {
-    return const_iterator((pointer)(payload_ + size_));
-  }
-
- private:
-  ArrayVal();
-};
-
-inline FbsonDocument *FbsonDocument::createDocument(const char *pb,
-                                                    uint32_t size) {
-  if (!pb || size < sizeof(FbsonHeader) + sizeof(FbsonValue)) {
-    return nullptr;
-  }
-
-  FbsonDocument *doc = (FbsonDocument *)pb;
-  if (doc->header_.ver_ != FBSON_VER) {
-    return nullptr;
-  }
-
-  FbsonValue *val = (FbsonValue *)doc->payload_;
-  if (!val->isObject() || size != sizeof(FbsonHeader) + val->numPackedBytes()) {
-    return nullptr;
-  }
-
-  return doc;
-}
-
-inline FbsonValue *FbsonDocument::createValue(const char *pb, uint32_t size) {
-  if (!pb || size < sizeof(FbsonHeader) + sizeof(FbsonValue)) {
-    return nullptr;
-  }
-
-  FbsonDocument *doc = (FbsonDocument *)pb;
-  if (doc->header_.ver_ != FBSON_VER) {
-    return nullptr;
-  }
-
-  FbsonValue *val = (FbsonValue *)doc->payload_;
-  if (size != sizeof(FbsonHeader) + val->numPackedBytes()) {
-    return nullptr;
-  }
-
-  return val;
-}
-
-inline unsigned int FbsonKeyValue::numPackedBytes() const {
-  unsigned int ks = keyPackedBytes();
-  FbsonValue *val = (FbsonValue *)(((char *)this) + ks);
-  return ks + val->numPackedBytes();
-}
-
-// Poor man's "virtual" function FbsonValue::numPackedBytes
-inline unsigned int FbsonValue::numPackedBytes() const {
-  switch (type_) {
-  case FbsonType::T_Null:
-  case FbsonType::T_True:
-  case FbsonType::T_False: { return sizeof(type_); }
-
-  case FbsonType::T_Int8: { return sizeof(type_) + sizeof(int8_t); }
-  case FbsonType::T_Int16: { return sizeof(type_) + sizeof(int16_t); }
-  case FbsonType::T_Int32: { return sizeof(type_) + sizeof(int32_t); }
-  case FbsonType::T_Int64: { return sizeof(type_) + sizeof(int64_t); }
-  case FbsonType::T_Double: { return sizeof(type_) + sizeof(double); }
-  case FbsonType::T_String:
-  case FbsonType::T_Binary: { return ((BlobVal *)(this))->numPackedBytes(); }
-
-  case FbsonType::T_Object:
-  case FbsonType::T_Array: {
-    return ((ContainerVal *)(this))->numPackedBytes();
-  }
-  default:
-    return 0;
-  }
-}
-
-inline unsigned int FbsonValue::size() const {
-  switch (type_) {
-  case FbsonType::T_Int8: { return sizeof(int8_t); }
-  case FbsonType::T_Int16: { return sizeof(int16_t); }
-  case FbsonType::T_Int32: { return sizeof(int32_t); }
-  case FbsonType::T_Int64: { return sizeof(int64_t); }
-  case FbsonType::T_Double: { return sizeof(double); }
-  case FbsonType::T_String:
-  case FbsonType::T_Binary: { return ((BlobVal *)(this))->getBlobLen(); }
-
-  case FbsonType::T_Object:
-  case FbsonType::T_Array: {
-    return ((ContainerVal *)(this))->getContainerSize();
-  }
-  case FbsonType::T_Null:
-  case FbsonType::T_True:
-  case FbsonType::T_False:
-  default:
-    return 0;
-  }
-}
-
-inline const char *FbsonValue::getValuePtr() const {
-  switch (type_) {
-  case FbsonType::T_Int8:
-  case FbsonType::T_Int16:
-  case FbsonType::T_Int32:
-  case FbsonType::T_Int64:
-  case FbsonType::T_Double:
-    return ((char *)this) + sizeof(FbsonType);
-
-  case FbsonType::T_String:
-  case FbsonType::T_Binary:
-    return ((BlobVal *)(this))->getBlob();
-
-  case FbsonType::T_Object:
-  case FbsonType::T_Array:
-    return ((ContainerVal *)(this))->getPayload();
-
-  case FbsonType::T_Null:
-  case FbsonType::T_True:
-  case FbsonType::T_False:
-  default:
-    return nullptr;
-  }
-}
-
-#pragma pack(pop)
-
-} // namespace fbson
-
-#endif  // ROCKSDB_LITE
-#endif // FBSON_FBSONDOCUMENT_H

third-party/fbson/FbsonJsonParser.h

@@ -1,748 +0,0 @@
-/*
- *  Copyright (c) 2014, Facebook, Inc.
- *  All rights reserved.
- *
- *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant
- *  of patent rights can be found in the PATENTS file in the same directory.
- *
- */
-
-/*
- * This file defines FbsonJsonParserT (template) and FbsonJsonParser.
- *
- * FbsonJsonParserT is a template class which implements a JSON parser.
- * FbsonJsonParserT parses JSON text, and serialize it to FBSON binary format
- * by using FbsonWriterT object. By default, FbsonJsonParserT creates a new
- * FbsonWriterT object with an output stream object.  However, you can also
- * pass in your FbsonWriterT or any stream object that implements some basic
- * interface of std::ostream (see FbsonStream.h).
- *
- * FbsonJsonParser specializes FbsonJsonParserT with FbsonOutStream type (see
- * FbsonStream.h). So unless you want to provide own a different output stream
- * type, use FbsonJsonParser object.
- *
- * ** Parsing JSON **
- * FbsonJsonParserT parses JSON string, and directly serializes into FBSON
- * packed bytes. There are three ways to parse a JSON string: (1) using
- * c-string, (2) using string with len, (3) using std::istream object. You can
- * use custome streambuf to redirect output. FbsonOutBuffer is a streambuf used
- * internally if the input is raw character buffer.
- *
- * You can reuse an FbsonJsonParserT object to parse/serialize multiple JSON
- * strings, and the previous FBSON will be overwritten.
- *
- * If parsing fails (returned false), the error code will be set to one of
- * FbsonErrType, and can be retrieved by calling getErrorCode().
- *
- * ** External dictionary **
- * During parsing a JSON string, you can pass a call-back function to map a key
- * string to an id, and store the dictionary id in FBSON to save space. The
- * purpose of using an external dictionary is more towards a collection of
- * documents (which has common keys) rather than a single document, so that
- * space saving will be siginificant.
- *
- * ** Endianness **
- * Note: FBSON serialization doesn't assume endianness of the server. However
- * you will need to ensure that the endianness at the reader side is the same
- * as that at the writer side (if they are on different machines). Otherwise,
- * proper conversion is needed when a number value is returned to the
- * caller/writer.
- *
- * @author Tian Xia <tianx@fb.com>
- */
-
-#ifndef FBSON_FBSONPARSER_H
-#define FBSON_FBSONPARSER_H
-
-#ifndef ROCKSDB_LITE
-
-#include <cmath>
-#include "FbsonDocument.h"
-#include "FbsonWriter.h"
-
-namespace fbson {
-
-const char *const kJsonDelim = " ,]}\t\r\n";
-const char *const kWhiteSpace = " \t\n\r";
-
-/*
- * Error codes
- */
-enum class FbsonErrType {
-  E_NONE = 0,
-  E_INVALID_VER,
-  E_EMPTY_STR,
-  E_OUTPUT_FAIL,
-  E_INVALID_DOCU,
-  E_INVALID_VALUE,
-  E_INVALID_KEY,
-  E_INVALID_STR,
-  E_INVALID_OBJ,
-  E_INVALID_ARR,
-  E_INVALID_HEX,
-  E_INVALID_OCTAL,
-  E_INVALID_DECIMAL,
-  E_INVALID_EXPONENT,
-  E_HEX_OVERFLOW,
-  E_OCTAL_OVERFLOW,
-  E_DECIMAL_OVERFLOW,
-  E_DOUBLE_OVERFLOW,
-  E_EXPONENT_OVERFLOW,
-};
-
-/*
- * Template FbsonJsonParserT
- */
-template <class OS_TYPE>
-class FbsonJsonParserT {
- public:
-  FbsonJsonParserT() : err_(FbsonErrType::E_NONE) {}
-
-  explicit FbsonJsonParserT(OS_TYPE &os)
-      : writer_(os), err_(FbsonErrType::E_NONE) {}
-
-  // parse a UTF-8 JSON string
-  bool parse(const std::string &str, hDictInsert handler = nullptr) {
-    return parse(str.c_str(), str.size(), handler);
-  }
-
-  // parse a UTF-8 JSON c-style string (NULL terminated)
-  bool parse(const char *c_str, hDictInsert handler = nullptr) {
-    return parse(c_str, strlen(c_str), handler);
-  }
-
-  // parse a UTF-8 JSON string with length
-  bool parse(const char *pch, uint32_t len, hDictInsert handler = nullptr) {
-    if (!pch || len == 0) {
-      err_ = FbsonErrType::E_EMPTY_STR;
-      return false;
-    }
-
-    FbsonInBuffer sb(pch, len);
-    std::istream in(&sb);
-    return parse(in, handler);
-  }
-
-  // parse UTF-8 JSON text from an input stream
-  bool parse(std::istream &in, hDictInsert handler = nullptr) {
-    bool res = false;
-
-    // reset output stream
-    writer_.reset();
-
-    trim(in);
-
-    if (in.peek() == '{') {
-      in.ignore();
-      res = parseObject(in, handler);
-    } else if (in.peek() == '[') {
-      in.ignore();
-      res = parseArray(in, handler);
-    } else {
-      err_ = FbsonErrType::E_INVALID_DOCU;
-    }
-
-    trim(in);
-    if (res && !in.eof()) {
-      err_ = FbsonErrType::E_INVALID_DOCU;
-      return false;
-    }
-
-    return res;
-  }
-
-  FbsonWriterT<OS_TYPE> &getWriter() { return writer_; }
-
-  FbsonErrType getErrorCode() { return err_; }
-
-  // clear error code
-  void clearErr() { err_ = FbsonErrType::E_NONE; }
-
- private:
-  // parse a JSON object (comma-separated list of key-value pairs)
-  bool parseObject(std::istream &in, hDictInsert handler) {
-    if (!writer_.writeStartObject()) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    trim(in);
-
-    if (in.peek() == '}') {
-      in.ignore();
-      // empty object
-      if (!writer_.writeEndObject()) {
-        err_ = FbsonErrType::E_OUTPUT_FAIL;
-        return false;
-      }
-      return true;
-    }
-
-    while (in.good()) {
-      if (in.get() != '"') {
-        err_ = FbsonErrType::E_INVALID_KEY;
-        return false;
-      }
-
-      if (!parseKVPair(in, handler)) {
-        return false;
-      }
-
-      trim(in);
-
-      char ch = in.get();
-      if (ch == '}') {
-        // end of the object
-        if (!writer_.writeEndObject()) {
-          err_ = FbsonErrType::E_OUTPUT_FAIL;
-          return false;
-        }
-        return true;
-      } else if (ch != ',') {
-        err_ = FbsonErrType::E_INVALID_OBJ;
-        return false;
-      }
-
-      trim(in);
-    }
-
-    err_ = FbsonErrType::E_INVALID_OBJ;
-    return false;
-  }
-
-  // parse a JSON array (comma-separated list of values)
-  bool parseArray(std::istream &in, hDictInsert handler) {
-    if (!writer_.writeStartArray()) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    trim(in);
-
-    if (in.peek() == ']') {
-      in.ignore();
-      // empty array
-      if (!writer_.writeEndArray()) {
-        err_ = FbsonErrType::E_OUTPUT_FAIL;
-        return false;
-      }
-      return true;
-    }
-
-    while (in.good()) {
-      if (!parseValue(in, handler)) {
-        return false;
-      }
-
-      trim(in);
-
-      char ch = in.get();
-      if (ch == ']') {
-        // end of the array
-        if (!writer_.writeEndArray()) {
-          err_ = FbsonErrType::E_OUTPUT_FAIL;
-          return false;
-        }
-        return true;
-      } else if (ch != ',') {
-        err_ = FbsonErrType::E_INVALID_ARR;
-        return false;
-      }
-
-      trim(in);
-    }
-
-    err_ = FbsonErrType::E_INVALID_ARR;
-    return false;
-  }
-
-  // parse a key-value pair, separated by ":"
-  bool parseKVPair(std::istream &in, hDictInsert handler) {
-    if (parseKey(in, handler) && parseValue(in, handler)) {
-      return true;
-    }
-
-    return false;
-  }
-
-  // parse a key (must be string)
-  bool parseKey(std::istream &in, hDictInsert handler) {
-    char key[FbsonKeyValue::sMaxKeyLen];
-    int i = 0;
-    while (in.good() && in.peek() != '"' && i < FbsonKeyValue::sMaxKeyLen) {
-      key[i++] = in.get();
-    }
-
-    if (!in.good() || in.peek() != '"' || i == 0) {
-      err_ = FbsonErrType::E_INVALID_KEY;
-      return false;
-    }
-
-    in.ignore(); // discard '"'
-
-    int key_id = -1;
-    if (handler) {
-      key_id = handler(key, i);
-    }
-
-    if (key_id < 0) {
-      writer_.writeKey(key, i);
-    } else {
-      writer_.writeKey(key_id);
-    }
-
-    trim(in);
-
-    if (in.get() != ':') {
-      err_ = FbsonErrType::E_INVALID_OBJ;
-      return false;
-    }
-
-    return true;
-  }
-
-  // parse a value
-  bool parseValue(std::istream &in, hDictInsert handler) {
-    bool res = false;
-
-    trim(in);
-
-    switch (in.peek()) {
-    case 'N':
-    case 'n': {
-      in.ignore();
-      res = parseNull(in);
-      break;
-    }
-    case 'T':
-    case 't': {
-      in.ignore();
-      res = parseTrue(in);
-      break;
-    }
-    case 'F':
-    case 'f': {
-      in.ignore();
-      res = parseFalse(in);
-      break;
-    }
-    case '"': {
-      in.ignore();
-      res = parseString(in);
-      break;
-    }
-    case '{': {
-      in.ignore();
-      res = parseObject(in, handler);
-      break;
-    }
-    case '[': {
-      in.ignore();
-      res = parseArray(in, handler);
-      break;
-    }
-    default: {
-      res = parseNumber(in);
-      break;
-    }
-    }
-
-    return res;
-  }
-
-  // parse NULL value
-  bool parseNull(std::istream &in) {
-    if (tolower(in.get()) == 'u' && tolower(in.get()) == 'l' &&
-        tolower(in.get()) == 'l') {
-      writer_.writeNull();
-      return true;
-    }
-
-    err_ = FbsonErrType::E_INVALID_VALUE;
-    return false;
-  }
-
-  // parse TRUE value
-  bool parseTrue(std::istream &in) {
-    if (tolower(in.get()) == 'r' && tolower(in.get()) == 'u' &&
-        tolower(in.get()) == 'e') {
-      writer_.writeBool(true);
-      return true;
-    }
-
-    err_ = FbsonErrType::E_INVALID_VALUE;
-    return false;
-  }
-
-  // parse FALSE value
-  bool parseFalse(std::istream &in) {
-    if (tolower(in.get()) == 'a' && tolower(in.get()) == 'l' &&
-        tolower(in.get()) == 's' && tolower(in.get()) == 'e') {
-      writer_.writeBool(false);
-      return true;
-    }
-
-    err_ = FbsonErrType::E_INVALID_VALUE;
-    return false;
-  }
-
-  // parse a string
-  bool parseString(std::istream &in) {
-    if (!writer_.writeStartString()) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    bool escaped = false;
-    char buffer[4096]; // write 4KB at a time
-    int nread = 0;
-    while (in.good()) {
-      char ch = in.get();
-      if (ch != '"' || escaped) {
-        buffer[nread++] = ch;
-        if (nread == 4096) {
-          // flush buffer
-          if (!writer_.writeString(buffer, nread)) {
-            err_ = FbsonErrType::E_OUTPUT_FAIL;
-            return false;
-          }
-          nread = 0;
-        }
-        // set/reset escape
-        if (ch == '\\' || escaped) {
-          escaped = !escaped;
-        }
-      } else {
-        // write all remaining bytes in the buffer
-        if (nread > 0) {
-          if (!writer_.writeString(buffer, nread)) {
-            err_ = FbsonErrType::E_OUTPUT_FAIL;
-            return false;
-          }
-        }
-        // end writing string
-        if (!writer_.writeEndString()) {
-          err_ = FbsonErrType::E_OUTPUT_FAIL;
-          return false;
-        }
-        return true;
-      }
-    }
-
-    err_ = FbsonErrType::E_INVALID_STR;
-    return false;
-  }
-
-  // parse a number
-  // Number format can be hex, octal, or decimal (including float).
-  // Only decimal can have (+/-) sign prefix.
-  bool parseNumber(std::istream &in) {
-    bool ret = false;
-    switch (in.peek()) {
-    case '0': {
-      in.ignore();
-
-      if (in.peek() == 'x' || in.peek() == 'X') {
-        in.ignore();
-        ret = parseHex(in);
-      } else if (in.peek() == '.') {
-        in.ignore();
-        ret = parseDouble(in, 0, 0, 1);
-      } else {
-        ret = parseOctal(in);
-      }
-
-      break;
-    }
-    case '-': {
-      in.ignore();
-      ret = parseDecimal(in, -1);
-      break;
-    }
-    case '+':
-      in.ignore();
-    // fall through
-    default:
-      ret = parseDecimal(in, 1);
-      break;
-    }
-
-    return ret;
-  }
-
-  // parse a number in hex format
-  bool parseHex(std::istream &in) {
-    uint64_t val = 0;
-    int num_digits = 0;
-    char ch = tolower(in.peek());
-    while (in.good() && !strchr(kJsonDelim, ch) && (++num_digits) <= 16) {
-      if (ch >= '0' && ch <= '9') {
-        val = (val << 4) + (ch - '0');
-      } else if (ch >= 'a' && ch <= 'f') {
-        val = (val << 4) + (ch - 'a' + 10);
-      } else { // unrecognized hex digit
-        err_ = FbsonErrType::E_INVALID_HEX;
-        return false;
-      }
-
-      in.ignore();
-      ch = tolower(in.peek());
-    }
-
-    int size = 0;
-    if (num_digits <= 2) {
-      size = writer_.writeInt8(val);
-    } else if (num_digits <= 4) {
-      size = writer_.writeInt16(val);
-    } else if (num_digits <= 8) {
-      size = writer_.writeInt32(val);
-    } else if (num_digits <= 16) {
-      size = writer_.writeInt64(val);
-    } else {
-      err_ = FbsonErrType::E_HEX_OVERFLOW;
-      return false;
-    }
-
-    if (size == 0) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    return true;
-  }
-
-  // parse a number in octal format
-  bool parseOctal(std::istream &in) {
-    int64_t val = 0;
-    char ch = in.peek();
-    while (in.good() && !strchr(kJsonDelim, ch)) {
-      if (ch >= '0' && ch <= '7') {
-        val = val * 8 + (ch - '0');
-      } else {
-        err_ = FbsonErrType::E_INVALID_OCTAL;
-        return false;
-      }
-
-      // check if the number overflows
-      if (val < 0) {
-        err_ = FbsonErrType::E_OCTAL_OVERFLOW;
-        return false;
-      }
-
-      in.ignore();
-      ch = in.peek();
-    }
-
-    int size = 0;
-    if (val <= std::numeric_limits<int8_t>::max()) {
-      size = writer_.writeInt8(val);
-    } else if (val <= std::numeric_limits<int16_t>::max()) {
-      size = writer_.writeInt16(val);
-    } else if (val <= std::numeric_limits<int32_t>::max()) {
-      size = writer_.writeInt32(val);
-    } else { // val <= INT64_MAX
-      size = writer_.writeInt64(val);
-    }
-
-    if (size == 0) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    return true;
-  }
-
-  // parse a number in decimal (including float)
-  bool parseDecimal(std::istream &in, int sign) {
-    int64_t val = 0;
-    int precision = 0;
-
-    char ch = 0;
-    while (in.good() && (ch = in.peek()) == '0')
-      in.ignore();
-
-    while (in.good() && !strchr(kJsonDelim, ch)) {
-      if (ch >= '0' && ch <= '9') {
-        val = val * 10 + (ch - '0');
-        ++precision;
-      } else if (ch == '.') {
-        // note we don't pop out '.'
-        return parseDouble(in, val, precision, sign);
-      } else {
-        err_ = FbsonErrType::E_INVALID_DECIMAL;
-        return false;
-      }
-
-      in.ignore();
-
-      // if the number overflows int64_t, first parse it as double iff we see a
-      // decimal point later. Otherwise, will treat it as overflow
-      if (val < 0 && val > std::numeric_limits<int64_t>::min()) {
-        return parseDouble(in, (uint64_t)val, precision, sign);
-      }
-
-      ch = in.peek();
-    }
-
-    if (sign < 0) {
-      val = -val;
-    }
-
-    int size = 0;
-    if (val >= std::numeric_limits<int8_t>::min() &&
-        val <= std::numeric_limits<int8_t>::max()) {
-      size = writer_.writeInt8(val);
-    } else if (val >= std::numeric_limits<int16_t>::min() &&
-               val <= std::numeric_limits<int16_t>::max()) {
-      size = writer_.writeInt16(val);
-    } else if (val >= std::numeric_limits<int32_t>::min() &&
-               val <= std::numeric_limits<int32_t>::max()) {
-      size = writer_.writeInt32(val);
-    } else { // val <= INT64_MAX
-      size = writer_.writeInt64(val);
-    }
-
-    if (size == 0) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    return true;
-  }
-
-  // parse IEEE745 double precision:
-  // Significand precision length - 15
-  // Maximum exponent value - 308
-  //
-  // "If a decimal string with at most 15 significant digits is converted to
-  // IEEE 754 double precision representation and then converted back to a
-  // string with the same number of significant digits, then the final string
-  // should match the original"
-  bool parseDouble(std::istream &in, double val, int precision, int sign) {
-    int integ = precision;
-    int frac = 0;
-    bool is_frac = false;
-
-    char ch = in.peek();
-    if (ch == '.') {
-      is_frac = true;
-      in.ignore();
-      ch = in.peek();
-    }
-
-    int exp = 0;
-    while (in.good() && !strchr(kJsonDelim, ch)) {
-      if (ch >= '0' && ch <= '9') {
-        if (precision < 15) {
-          val = val * 10 + (ch - '0');
-          if (is_frac) {
-            ++frac;
-          } else {
-            ++integ;
-          }
-          ++precision;
-        } else if (!is_frac) {
-          ++exp;
-        }
-      } else if (ch == 'e' || ch == 'E') {
-        in.ignore();
-        int exp2;
-        if (!parseExponent(in, exp2)) {
-          return false;
-        }
-
-        exp += exp2;
-        // check if exponent overflows
-        if (exp > 308 || exp < -308) {
-          err_ = FbsonErrType::E_EXPONENT_OVERFLOW;
-          return false;
-        }
-
-        is_frac = true;
-        break;
-      }
-
-      in.ignore();
-      ch = in.peek();
-    }
-
-    if (!is_frac) {
-      err_ = FbsonErrType::E_DECIMAL_OVERFLOW;
-      return false;
-    }
-
-    val *= std::pow(10, exp - frac);
-    if (std::isnan(val) || std::isinf(val)) {
-      err_ = FbsonErrType::E_DOUBLE_OVERFLOW;
-      return false;
-    }
-
-    if (sign < 0) {
-      val = -val;
-    }
-
-    if (writer_.writeDouble(val) == 0) {
-      err_ = FbsonErrType::E_OUTPUT_FAIL;
-      return false;
-    }
-
-    return true;
-  }
-
-  // parse the exponent part of a double number
-  bool parseExponent(std::istream &in, int &exp) {
-    bool neg = false;
-
-    char ch = in.peek();
-    if (ch == '+') {
-      in.ignore();
-      ch = in.peek();
-    } else if (ch == '-') {
-      neg = true;
-      in.ignore();
-      ch = in.peek();
-    }
-
-    exp = 0;
-    while (in.good() && !strchr(kJsonDelim, ch)) {
-      if (ch >= '0' && ch <= '9') {
-        exp = exp * 10 + (ch - '0');
-      } else {
-        err_ = FbsonErrType::E_INVALID_EXPONENT;
-        return false;
-      }
-
-      if (exp > 308) {
-        err_ = FbsonErrType::E_EXPONENT_OVERFLOW;
-        return false;
-      }
-
-      in.ignore();
-      ch = in.peek();
-    }
-
-    if (neg) {
-      exp = -exp;
-    }
-
-    return true;
-  }
-
-  void trim(std::istream &in) {
-    while (in.good() && strchr(kWhiteSpace, in.peek())) {
-      in.ignore();
-    }
-  }
-
- private:
-  FbsonWriterT<OS_TYPE> writer_;
-  FbsonErrType err_;
-};
-
-typedef FbsonJsonParserT<FbsonOutStream> FbsonJsonParser;
-
-} // namespace fbson
-
-#endif  // ROCKSDB_LITE
-#endif // FBSON_FBSONPARSER_H

third-party/fbson/FbsonStream.h

@@ -1,173 +0,0 @@
-/*
- *  Copyright (c) 2014, Facebook, Inc.
- *  All rights reserved.
- *
- *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant
- *  of patent rights can be found in the PATENTS file in the same directory.
- *
- */
-
-/*
- * This header file defines FbsonInBuffer and FbsonOutStream classes.
- *
- * ** Input Buffer **
- * FbsonInBuffer is a customer input buffer to wrap raw character buffer. Its
- * object instances are used to create std::istream objects interally.
- *
- * ** Output Stream **
- * FbsonOutStream is a custom output stream classes, to contain the FBSON
- * serialized binary. The class is conveniently used to specialize templates of
- * FbsonParser and FbsonWriter.
- *
- * @author Tian Xia <tianx@fb.com>
- */
-
-#ifndef FBSON_FBSONSTREAM_H
-#define FBSON_FBSONSTREAM_H
-
-#ifndef ROCKSDB_LITE
-
-#include <iostream>
-
-namespace fbson {
-
-// lengths includes sign
-#define MAX_INT_DIGITS 11
-#define MAX_INT64_DIGITS 20
-#define MAX_DOUBLE_DIGITS 23 // 1(sign)+16(significant)+1(decimal)+5(exponent)
-
-/*
- * FBSON's implementation of input buffer
- */
-class FbsonInBuffer : public std::streambuf {
- public:
-  FbsonInBuffer(const char *str, uint32_t len) {
-    // this is read buffer and the str will not be changed
-    // so we use const_cast (ugly!) to remove constness
-    char *pch(const_cast<char *>(str));
-    setg(pch, pch, pch + len);
-  }
-};
-
-/*
- * FBSON's implementation of output stream.
- *
- * This is a wrapper of a char buffer. By default, the buffer capacity is 1024
- * bytes. We will double the buffer if realloc is needed for writes.
- */
-class FbsonOutStream : public std::ostream {
- public:
-  explicit FbsonOutStream(uint32_t capacity = 1024)
-      : head_(nullptr), size_(0), capacity_(capacity), alloc_(true) {
-    if (capacity_ == 0) {
-      capacity_ = 1024;
-    }
-
-    head_ = (char *)malloc(capacity_);
-  }
-
-  FbsonOutStream(char *buffer, uint32_t capacity)
-      : head_(buffer), size_(0), capacity_(capacity), alloc_(false) {
-    assert(buffer && capacity_ > 0);
-  }
-
-  ~FbsonOutStream() {
-    if (alloc_) {
-      free(head_);
-    }
-  }
-
-  void put(char c) { write(&c, 1); }
-
-  void write(const char *c_str) { write(c_str, strlen(c_str)); }
-
-  void write(const char *bytes, uint32_t len) {
-    if (len == 0)
-      return;
-
-    if (size_ + len > capacity_) {
-      realloc(len);
-    }
-
-    memcpy(head_ + size_, bytes, len);
-    size_ += len;
-  }
-
-  // write the integer to string
-  void write(int i) {
-    // snprintf automatically adds a NULL, so we need one more char
-    if (size_ + MAX_INT_DIGITS + 1 > capacity_) {
-      realloc(MAX_INT_DIGITS + 1);
-    }
-
-    int len = snprintf(head_ + size_, MAX_INT_DIGITS + 1, "%d", i);
-    assert(len > 0);
-    size_ += len;
-  }
-
-  // write the 64bit integer to string
-  void write(int64_t l) {
-    // snprintf automatically adds a NULL, so we need one more char
-    if (size_ + MAX_INT64_DIGITS + 1 > capacity_) {
-      realloc(MAX_INT64_DIGITS + 1);
-    }
-
-    int len = snprintf(head_ + size_, MAX_INT64_DIGITS + 1, "%ld", l);
-    assert(len > 0);
-    size_ += len;
-  }
-
-  // write the double to string
-  void write(double d) {
-    // snprintf automatically adds a NULL, so we need one more char
-    if (size_ + MAX_DOUBLE_DIGITS + 1 > capacity_) {
-      realloc(MAX_DOUBLE_DIGITS + 1);
-    }
-
-    int len = snprintf(head_ + size_, MAX_DOUBLE_DIGITS + 1, "%.15g", d);
-    assert(len > 0);
-    size_ += len;
-  }
-
-  pos_type tellp() const { return size_; }
-
-  void seekp(pos_type pos) { size_ = pos; }
-
-  const char *getBuffer() const { return head_; }
-
-  pos_type getSize() const { return tellp(); }
-
- private:
-  void realloc(uint32_t len) {
-    assert(capacity_ > 0);
-
-    capacity_ *= 2;
-    while (capacity_ < size_ + len) {
-      capacity_ *= 2;
-    }
-
-    if (alloc_) {
-      char *new_buf = (char *)::realloc(head_, capacity_);
-      assert(new_buf);
-      head_ = new_buf;
-    } else {
-      char *new_buf = (char *)::malloc(capacity_);
-      assert(new_buf);
-      memcpy(new_buf, head_, size_);
-      head_ = new_buf;
-      alloc_ = true;
-    }
-  }
-
- private:
-  char *head_;
-  uint32_t size_;
-  uint32_t capacity_;
-  bool alloc_;
-};
-
-} // namespace fbson
-
-#endif  // ROCKSDB_LITE
-#endif // FBSON_FBSONSTREAM_H

third-party/fbson/FbsonUtil.h

@@ -1,173 +0,0 @@
-/*
- *  Copyright (c) 2014, Facebook, Inc.
- *  All rights reserved.
- *
- *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant
- *  of patent rights can be found in the PATENTS file in the same directory.
- *
- */
-
-/*
- * This header file defines miscellaneous utility classes.
- *
- * @author Tian Xia <tianx@fb.com>
- */
-
-#ifndef FBSON_FBSONUTIL_H
-#define FBSON_FBSONUTIL_H
-
-#ifndef ROCKSDB_LITE
-
-#include <sstream>
-#include "FbsonDocument.h"
-
-namespace fbson {
-
-#define OUT_BUF_SIZE 1024
-
-/*
- * FbsonToJson converts an FbsonValue object to a JSON string.
- */
-class FbsonToJson {
- public:
-  FbsonToJson() : os_(buffer_, OUT_BUF_SIZE) {}
-
-  // get json string
-  const char *json(const FbsonValue *pval) {
-    os_.clear();
-    os_.seekp(0);
-
-    if (pval) {
-      intern_json(pval);
-    }
-
-    os_.put(0);
-    return os_.getBuffer();
-  }
-
- private:
-  // recursively convert FbsonValue
-  void intern_json(const FbsonValue *val) {
-    switch (val->type()) {
-    case FbsonType::T_Null: {
-      os_.write("null", 4);
-      break;
-    }
-    case FbsonType::T_True: {
-      os_.write("true", 4);
-      break;
-    }
-    case FbsonType::T_False: {
-      os_.write("false", 5);
-      break;
-    }
-    case FbsonType::T_Int8: {
-      os_.write(((Int8Val *)val)->val());
-      break;
-    }
-    case FbsonType::T_Int16: {
-      os_.write(((Int16Val *)val)->val());
-      break;
-    }
-    case FbsonType::T_Int32: {
-      os_.write(((Int32Val *)val)->val());
-      break;
-    }
-    case FbsonType::T_Int64: {
-      os_.write(((Int64Val *)val)->val());
-      break;
-    }
-    case FbsonType::T_Double: {
-      os_.write(((DoubleVal *)val)->val());
-      break;
-    }
-    case FbsonType::T_String: {
-      os_.put('"');
-      os_.write(((StringVal *)val)->getBlob(),
-                ((StringVal *)val)->getBlobLen());
-      os_.put('"');
-      break;
-    }
-    case FbsonType::T_Binary: {
-      os_.write("\"<BINARY>", 9);
-      os_.write(((BinaryVal *)val)->getBlob(),
-                ((BinaryVal *)val)->getBlobLen());
-      os_.write("<BINARY>\"", 9);
-      break;
-    }
-    case FbsonType::T_Object: {
-      object_to_json((ObjectVal *)val);
-      break;
-    }
-    case FbsonType::T_Array: {
-      array_to_json((ArrayVal *)val);
-      break;
-    }
-    default:
-      break;
-    }
-  }
-
-  // convert object
-  void object_to_json(const ObjectVal *val) {
-    os_.put('{');
-
-    auto iter = val->begin();
-    auto iter_fence = val->end();
-
-    while (iter < iter_fence) {
-      // write key
-      if (iter->klen()) {
-        os_.put('"');
-        os_.write(iter->getKeyStr(), iter->klen());
-        os_.put('"');
-      } else {
-        os_.write(iter->getKeyId());
-      }
-      os_.put(':');
-
-      // convert value
-      intern_json(iter->value());
-
-      ++iter;
-      if (iter != iter_fence) {
-        os_.put(',');
-      }
-    }
-
-    assert(iter == iter_fence);
-
-    os_.put('}');
-  }
-
-  // convert array to json
-  void array_to_json(const ArrayVal *val) {
-    os_.put('[');
-
-    auto iter = val->begin();
-    auto iter_fence = val->end();
-
-    while (iter != iter_fence) {
-      // convert value
-      intern_json((const FbsonValue *)iter);
-      ++iter;
-      if (iter != iter_fence) {
-        os_.put(',');
-      }
-    }
-
-    assert(iter == iter_fence);
-
-    os_.put(']');
-  }
-
- private:
-  FbsonOutStream os_;
-  char buffer_[OUT_BUF_SIZE];
-};
-
-} // namespace fbson
-
-#endif  // ROCKSDB_LITE
-#endif // FBSON_FBSONUTIL_H

third-party/fbson/FbsonWriter.h

@@ -1,438 +0,0 @@
-/*
- *  Copyright (c) 2014, Facebook, Inc.
- *  All rights reserved.
- *
- *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant
- *  of patent rights can be found in the PATENTS file in the same directory.
- *
- */
-
-/*
- * This file defines FbsonWriterT (template) and FbsonWriter.
- *
- * FbsonWriterT is a template class which implements an FBSON serializer.
- * Users call various write functions of FbsonWriterT object to write values
- * directly to FBSON packed bytes. All write functions of value or key return
- * the number of bytes written to FBSON, or 0 if there is an error. To write an
- * object, an array, or a string, you must call writeStart[..] before writing
- * values or key, and call writeEnd[..] after finishing at the end.
- *
- * By default, an FbsonWriterT object creates an output stream buffer.
- * Alternatively, you can also pass any output stream object to a writer, as
- * long as the stream object implements some basic functions of std::ostream
- * (such as FbsonOutStream, see FbsonStream.h).
- *
- * FbsonWriter specializes FbsonWriterT with FbsonOutStream type (see
- * FbsonStream.h). So unless you want to provide own a different output stream
- * type, use FbsonParser object.
- *
- * @author Tian Xia <tianx@fb.com>
- */
-
-#ifndef FBSON_FBSONWRITER_H
-#define FBSON_FBSONWRITER_H
-
-#ifndef ROCKSDB_LITE
-
-#include <stack>
-#include "FbsonDocument.h"
-#include "FbsonStream.h"
-
-namespace fbson {
-
-template <class OS_TYPE>
-class FbsonWriterT {
- public:
-  FbsonWriterT()
-      : alloc_(true), hasHdr_(false), kvState_(WS_Value), str_pos_(0) {
-    os_ = new OS_TYPE();
-  }
-
-  explicit FbsonWriterT(OS_TYPE &os)
-      : os_(&os),
-        alloc_(false),
-        hasHdr_(false),
-        kvState_(WS_Value),
-        str_pos_(0) {}
-
-  ~FbsonWriterT() {
-    if (alloc_) {
-      delete os_;
-    }
-  }
-
-  void reset() {
-    os_->clear();
-    os_->seekp(0);
-    hasHdr_ = false;
-    kvState_ = WS_Value;
-    for (; !stack_.empty(); stack_.pop())
-      ;
-  }
-
-  // write a key string (or key id if an external dict is provided)
-  uint32_t writeKey(const char *key,
-                    uint8_t len,
-                    hDictInsert handler = nullptr) {
-    if (len && !stack_.empty() && verifyKeyState()) {
-      int key_id = -1;
-      if (handler) {
-        key_id = handler(key, len);
-      }
-
-      uint32_t size = sizeof(uint8_t);
-      if (key_id < 0) {
-        os_->put(len);
-        os_->write(key, len);
-        size += len;
-      } else if (key_id <= FbsonKeyValue::sMaxKeyId) {
-        FbsonKeyValue::keyid_type idx = key_id;
-        os_->put(0);
-        os_->write((char *)&idx, sizeof(FbsonKeyValue::keyid_type));
-        size += sizeof(FbsonKeyValue::keyid_type);
-      } else { // key id overflow
-        assert(0);
-        return 0;
-      }
-
-      kvState_ = WS_Key;
-      return size;
-    }
-
-    return 0;
-  }
-
-  // write a key id
-  uint32_t writeKey(FbsonKeyValue::keyid_type idx) {
-    if (!stack_.empty() && verifyKeyState()) {
-      os_->put(0);
-      os_->write((char *)&idx, sizeof(FbsonKeyValue::keyid_type));
-      kvState_ = WS_Key;
-      return sizeof(uint8_t) + sizeof(FbsonKeyValue::keyid_type);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeNull() {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Null);
-      kvState_ = WS_Value;
-      return sizeof(FbsonValue);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeBool(bool b) {
-    if (!stack_.empty() && verifyValueState()) {
-      if (b) {
-        os_->put((FbsonTypeUnder)FbsonType::T_True);
-      } else {
-        os_->put((FbsonTypeUnder)FbsonType::T_False);
-      }
-
-      kvState_ = WS_Value;
-      return sizeof(FbsonValue);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeInt8(int8_t v) {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Int8);
-      os_->put(v);
-      kvState_ = WS_Value;
-      return sizeof(Int8Val);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeInt16(int16_t v) {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Int16);
-      os_->write((char *)&v, sizeof(int16_t));
-      kvState_ = WS_Value;
-      return sizeof(Int16Val);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeInt32(int32_t v) {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Int32);
-      os_->write((char *)&v, sizeof(int32_t));
-      kvState_ = WS_Value;
-      return sizeof(Int32Val);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeInt64(int64_t v) {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Int64);
-      os_->write((char *)&v, sizeof(int64_t));
-      kvState_ = WS_Value;
-      return sizeof(Int64Val);
-    }
-
-    return 0;
-  }
-
-  uint32_t writeDouble(double v) {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Double);
-      os_->write((char *)&v, sizeof(double));
-      kvState_ = WS_Value;
-      return sizeof(DoubleVal);
-    }
-
-    return 0;
-  }
-
-  // must call writeStartString before writing a string val
-  bool writeStartString() {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_String);
-      str_pos_ = os_->tellp();
-
-      // fill the size bytes with 0 for now
-      uint32_t size = 0;
-      os_->write((char *)&size, sizeof(uint32_t));
-
-      kvState_ = WS_String;
-      return true;
-    }
-
-    return false;
-  }
-
-  // finish writing a string val
-  bool writeEndString() {
-    if (kvState_ == WS_String) {
-      std::streampos cur_pos = os_->tellp();
-      int32_t size = cur_pos - str_pos_ - sizeof(uint32_t);
-      assert(size >= 0);
-
-      os_->seekp(str_pos_);
-      os_->write((char *)&size, sizeof(uint32_t));
-      os_->seekp(cur_pos);
-
-      kvState_ = WS_Value;
-      return true;
-    }
-
-    return false;
-  }
-
-  uint32_t writeString(const char *str, uint32_t len) {
-    if (kvState_ == WS_String) {
-      os_->write(str, len);
-      return len;
-    }
-
-    return 0;
-  }
-
-  uint32_t writeString(char ch) {
-    if (kvState_ == WS_String) {
-      os_->put(ch);
-      return 1;
-    }
-
-    return 0;
-  }
-
-  // must call writeStartBinary before writing a binary val
-  bool writeStartBinary() {
-    if (!stack_.empty() && verifyValueState()) {
-      os_->put((FbsonTypeUnder)FbsonType::T_Binary);
-      str_pos_ = os_->tellp();
-
-      // fill the size bytes with 0 for now
-      uint32_t size = 0;
-      os_->write((char *)&size, sizeof(uint32_t));
-
-      kvState_ = WS_Binary;
-      return true;
-    }
-
-    return false;
-  }
-
-  // finish writing a binary val
-  bool writeEndBinary() {
-    if (kvState_ == WS_Binary) {
-      std::streampos cur_pos = os_->tellp();
-      int32_t size = cur_pos - str_pos_ - sizeof(uint32_t);
-      assert(size >= 0);
-
-      os_->seekp(str_pos_);
-      os_->write((char *)&size, sizeof(uint32_t));
-      os_->seekp(cur_pos);
-
-      kvState_ = WS_Value;
-      return true;
-    }
-
-    return false;
-  }
-
-  uint32_t writeBinary(const char *bin, uint32_t len) {
-    if (kvState_ == WS_Binary) {
-      os_->write(bin, len);
-      return len;
-    }
-
-    return 0;
-  }
-
-  // must call writeStartObject before writing an object val
-  bool writeStartObject() {
-    if (stack_.empty() || verifyValueState()) {
-      if (stack_.empty()) {
-        // if this is a new FBSON, write the header
-        if (!hasHdr_) {
-          writeHeader();
-        } else
-          return false;
-      }
-
-      os_->put((FbsonTypeUnder)FbsonType::T_Object);
-      // save the size position
-      stack_.push(WriteInfo({WS_Object, os_->tellp()}));
-
-      // fill the size bytes with 0 for now
-      uint32_t size = 0;
-      os_->write((char *)&size, sizeof(uint32_t));
-
-      kvState_ = WS_Value;
-      return true;
-    }
-
-    return false;
-  }
-
-  // finish writing an object val
-  bool writeEndObject() {
-    if (!stack_.empty() && stack_.top().state == WS_Object &&
-        kvState_ == WS_Value) {
-      WriteInfo &ci = stack_.top();
-      std::streampos cur_pos = os_->tellp();
-      int32_t size = cur_pos - ci.sz_pos - sizeof(uint32_t);
-      assert(size >= 0);
-
-      os_->seekp(ci.sz_pos);
-      os_->write((char *)&size, sizeof(uint32_t));
-      os_->seekp(cur_pos);
-      stack_.pop();
-
-      return true;
-    }
-
-    return false;
-  }
-
-  // must call writeStartArray before writing an array val
-  bool writeStartArray() {
-    if (stack_.empty() || verifyValueState()) {
-      if (stack_.empty()) {
-        // if this is a new FBSON, write the header
-        if (!hasHdr_) {
-          writeHeader();
-        } else
-          return false;
-      }
-
-      os_->put((FbsonTypeUnder)FbsonType::T_Array);
-      // save the size position
-      stack_.push(WriteInfo({WS_Array, os_->tellp()}));
-
-      // fill the size bytes with 0 for now
-      uint32_t size = 0;
-      os_->write((char *)&size, sizeof(uint32_t));
-
-      kvState_ = WS_Value;
-      return true;
-    }
-
-    return false;
-  }
-
-  // finish writing an array val
-  bool writeEndArray() {
-    if (!stack_.empty() && stack_.top().state == WS_Array &&
-        kvState_ == WS_Value) {
-      WriteInfo &ci = stack_.top();
-      std::streampos cur_pos = os_->tellp();
-      int32_t size = cur_pos - ci.sz_pos - sizeof(uint32_t);
-      assert(size >= 0);
-
-      os_->seekp(ci.sz_pos);
-      os_->write((char *)&size, sizeof(uint32_t));
-      os_->seekp(cur_pos);
-      stack_.pop();
-
-      return true;
-    }
-
-    return false;
-  }
-
-  OS_TYPE *getOutput() { return os_; }
-
- private:
-  // verify we are in the right state before writing a value
-  bool verifyValueState() {
-    assert(!stack_.empty());
-    return (stack_.top().state == WS_Object && kvState_ == WS_Key) ||
-           (stack_.top().state == WS_Array && kvState_ == WS_Value);
-  }
-
-  // verify we are in the right state before writing a key
-  bool verifyKeyState() {
-    assert(!stack_.empty());
-    return stack_.top().state == WS_Object && kvState_ == WS_Value;
-  }
-
-  void writeHeader() {
-    os_->put(FBSON_VER);
-    hasHdr_ = true;
-  }
-
- private:
-  enum WriteState {
-    WS_NONE,
-    WS_Array,
-    WS_Object,
-    WS_Key,
-    WS_Value,
-    WS_String,
-    WS_Binary,
-  };
-
-  struct WriteInfo {
-    WriteState state;
-    std::streampos sz_pos;
-  };
-
- private:
-  OS_TYPE *os_;
-  bool alloc_;
-  bool hasHdr_;
-  WriteState kvState_; // key or value state
-  std::streampos str_pos_;
-  std::stack<WriteInfo> stack_;
-};
-
-typedef FbsonWriterT<FbsonOutStream> FbsonWriter;
-
-} // namespace fbson
-
-#endif  // ROCKSDB_LITE
-#endif // FBSON_FBSONWRITER_H

third-party/rapidjson/document.h

@@ -0,0 +1,821 @@
+#ifndef RAPIDJSON_DOCUMENT_H_
+#define RAPIDJSON_DOCUMENT_H_
+
+#include "reader.h"
+#include "internal/strfunc.h"
+#include <new>		// placement new
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4127) // conditional expression is constant
+#endif
+
+namespace rapidjson {
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericValue
+
+//! Represents a JSON value. Use Value for UTF8 encoding and default allocator.
+/*!
+	A JSON value can be one of 7 types. This class is a variant type supporting
+	these types.
+
+	Use the Value if UTF8 and default allocator
+
+	\tparam Encoding	Encoding of the value. (Even non-string values need to have the same encoding in a document)
+	\tparam Allocator	Allocator type for allocating memory of object, array and string.
+*/
+#pragma pack (push, 4)
+template <typename Encoding, typename Allocator = MemoryPoolAllocator<> > 
+class GenericValue {
+public:
+	//! Name-value pair in an object.
+	struct Member { 
+		GenericValue<Encoding, Allocator> name;		//!< name of member (must be a string)
+		GenericValue<Encoding, Allocator> value;	//!< value of member.
+	};
+
+	typedef Encoding EncodingType;					//!< Encoding type from template parameter.
+	typedef Allocator AllocatorType;				//!< Allocator type from template parameter.
+	typedef typename Encoding::Ch Ch;				//!< Character type derived from Encoding.
+	typedef Member* MemberIterator;					//!< Member iterator for iterating in object.
+	typedef const Member* ConstMemberIterator;		//!< Constant member iterator for iterating in object.
+	typedef GenericValue* ValueIterator;			//!< Value iterator for iterating in array.
+	typedef const GenericValue* ConstValueIterator;	//!< Constant value iterator for iterating in array.
+
+	//!@name Constructors and destructor.
+	//@{
+
+	//! Default constructor creates a null value.
+	GenericValue() : flags_(kNullFlag) {}
+
+	//! Copy constructor is not permitted.
+private:
+	GenericValue(const GenericValue& rhs);
+
+public:
+
+	//! Constructor with JSON value type.
+	/*! This creates a Value of specified type with default content.
+		\param type	Type of the value.
+		\note Default content for number is zero.
+	*/
+	GenericValue(Type type) {
+		static const unsigned defaultFlags[7] = {
+			kNullFlag, kFalseFlag, kTrueFlag, kObjectFlag, kArrayFlag, kConstStringFlag,
+			kNumberFlag | kIntFlag | kUintFlag | kInt64Flag | kUint64Flag | kDoubleFlag
+		};
+		RAPIDJSON_ASSERT(type <= kNumberType);
+		flags_ = defaultFlags[type];
+		memset(&data_, 0, sizeof(data_));
+	}
+
+	//! Constructor for boolean value.
+	GenericValue(bool b) : flags_(b ? kTrueFlag : kFalseFlag) {}
+
+	//! Constructor for int value.
+	GenericValue(int i) : flags_(kNumberIntFlag) { 
+		data_.n.i64 = i;
+		if (i >= 0)
+			flags_ |= kUintFlag | kUint64Flag;
+	}
+
+	//! Constructor for unsigned value.
+	GenericValue(unsigned u) : flags_(kNumberUintFlag) {
+		data_.n.u64 = u; 
+		if (!(u & 0x80000000))
+			flags_ |= kIntFlag | kInt64Flag;
+	}
+
+	//! Constructor for int64_t value.
+	GenericValue(int64_t i64) : flags_(kNumberInt64Flag) {
+		data_.n.i64 = i64;
+		if (i64 >= 0) {
+			flags_ |= kNumberUint64Flag;
+			if (!(i64 & 0xFFFFFFFF00000000LL))
+				flags_ |= kUintFlag;
+			if (!(i64 & 0xFFFFFFFF80000000LL))
+				flags_ |= kIntFlag;
+		}
+		else if (i64 >= -2147483648LL)
+			flags_ |= kIntFlag;
+	}
+
+	//! Constructor for uint64_t value.
+	GenericValue(uint64_t u64) : flags_(kNumberUint64Flag) {
+		data_.n.u64 = u64;
+		if (!(u64 & 0x8000000000000000ULL))
+			flags_ |= kInt64Flag;
+		if (!(u64 & 0xFFFFFFFF00000000ULL))
+			flags_ |= kUintFlag;
+		if (!(u64 & 0xFFFFFFFF80000000ULL))
+			flags_ |= kIntFlag;
+	}
+
+	//! Constructor for double value.
+	GenericValue(double d) : flags_(kNumberDoubleFlag) { data_.n.d = d; }
+
+	//! Constructor for constant string (i.e. do not make a copy of string)
+	GenericValue(const Ch* s, SizeType length) { 
+		RAPIDJSON_ASSERT(s != NULL);
+		flags_ = kConstStringFlag;
+		data_.s.str = s;
+		data_.s.length = length;
+	}
+
+	//! Constructor for constant string (i.e. do not make a copy of string)
+	GenericValue(const Ch* s) { SetStringRaw(s, internal::StrLen(s)); }
+
+	//! Constructor for copy-string (i.e. do make a copy of string)
+	GenericValue(const Ch* s, SizeType length, Allocator& allocator) { SetStringRaw(s, length, allocator); }
+
+	//! Constructor for copy-string (i.e. do make a copy of string)
+	GenericValue(const Ch*s, Allocator& allocator) { SetStringRaw(s, internal::StrLen(s), allocator); }
+
+	//! Destructor.
+	/*! Need to destruct elements of array, members of object, or copy-string.
+	*/
+	~GenericValue() {
+		if (Allocator::kNeedFree) {	// Shortcut by Allocator's trait
+			switch(flags_) {
+			case kArrayFlag:
+				for (GenericValue* v = data_.a.elements; v != data_.a.elements + data_.a.size; ++v)
+					v->~GenericValue();
+				Allocator::Free(data_.a.elements);
+				break;
+
+			case kObjectFlag:
+				for (Member* m = data_.o.members; m != data_.o.members + data_.o.size; ++m) {
+					m->name.~GenericValue();
+					m->value.~GenericValue();
+				}
+				Allocator::Free(data_.o.members);
+				break;
+
+			case kCopyStringFlag:
+				Allocator::Free(const_cast<Ch*>(data_.s.str));
+				break;
+			}
+		}
+	}
+
+	//@}
+
+	//!@name Assignment operators
+	//@{
+
+	//! Assignment with move semantics.
+	/*! \param rhs Source of the assignment. It will become a null value after assignment.
+	*/
+	GenericValue& operator=(GenericValue& rhs) {
+		RAPIDJSON_ASSERT(this != &rhs);
+		this->~GenericValue();
+		memcpy(this, &rhs, sizeof(GenericValue));
+		rhs.flags_ = kNullFlag;
+		return *this;
+	}
+
+	//! Assignment with primitive types.
+	/*! \tparam T Either Type, int, unsigned, int64_t, uint64_t, const Ch*
+		\param value The value to be assigned.
+	*/
+	template <typename T>
+	GenericValue& operator=(T value) {
+		this->~GenericValue();
+		new (this) GenericValue(value);
+		return *this;
+	}
+	//@}
+
+	//!@name Type
+	//@{
+
+	Type GetType()	const { return static_cast<Type>(flags_ & kTypeMask); }
+	bool IsNull()	const { return flags_ == kNullFlag; }
+	bool IsFalse()	const { return flags_ == kFalseFlag; }
+	bool IsTrue()	const { return flags_ == kTrueFlag; }
+	bool IsBool()	const { return (flags_ & kBoolFlag) != 0; }
+	bool IsObject()	const { return flags_ == kObjectFlag; }
+	bool IsArray()	const { return flags_ == kArrayFlag; }
+	bool IsNumber() const { return (flags_ & kNumberFlag) != 0; }
+	bool IsInt()	const { return (flags_ & kIntFlag) != 0; }
+	bool IsUint()	const { return (flags_ & kUintFlag) != 0; }
+	bool IsInt64()	const { return (flags_ & kInt64Flag) != 0; }
+	bool IsUint64()	const { return (flags_ & kUint64Flag) != 0; }
+	bool IsDouble() const { return (flags_ & kDoubleFlag) != 0; }
+	bool IsString() const { return (flags_ & kStringFlag) != 0; }
+
+	//@}
+
+	//!@name Null
+	//@{
+
+	GenericValue& SetNull() { this->~GenericValue(); new (this) GenericValue(); return *this; }
+
+	//@}
+
+	//!@name Bool
+	//@{
+
+	bool GetBool() const { RAPIDJSON_ASSERT(IsBool()); return flags_ == kTrueFlag; }
+	GenericValue& SetBool(bool b) { this->~GenericValue(); new (this) GenericValue(b); return *this; }
+
+	//@}
+
+	//!@name Object
+	//@{
+
+	//! Set this value as an empty object.
+	GenericValue& SetObject() { this->~GenericValue(); new (this) GenericValue(kObjectType); return *this; }
+
+	//! Get the value associated with the object's name.
+	GenericValue& operator[](const Ch* name) {
+		if (Member* member = FindMember(name))
+			return member->value;
+		else {
+			static GenericValue NullValue;
+			return NullValue;
+		}
+	}
+	const GenericValue& operator[](const Ch* name) const { return const_cast<GenericValue&>(*this)[name]; }
+
+	//! Member iterators.
+	ConstMemberIterator MemberBegin() const	{ RAPIDJSON_ASSERT(IsObject()); return data_.o.members; }
+	ConstMemberIterator MemberEnd()	const	{ RAPIDJSON_ASSERT(IsObject()); return data_.o.members + data_.o.size; }
+	MemberIterator MemberBegin()			{ RAPIDJSON_ASSERT(IsObject()); return data_.o.members; }
+	MemberIterator MemberEnd()				{ RAPIDJSON_ASSERT(IsObject()); return data_.o.members + data_.o.size; }
+
+	//! Check whether a member exists in the object.
+	bool HasMember(const Ch* name) const { return FindMember(name) != 0; }
+
+	//! Add a member (name-value pair) to the object.
+	/*! \param name A string value as name of member.
+		\param value Value of any type.
+	    \param allocator Allocator for reallocating memory.
+	    \return The value itself for fluent API.
+	    \note The ownership of name and value will be transfered to this object if success.
+	*/
+	GenericValue& AddMember(GenericValue& name, GenericValue& value, Allocator& allocator) {
+		RAPIDJSON_ASSERT(IsObject());
+		RAPIDJSON_ASSERT(name.IsString());
+		Object& o = data_.o;
+		if (o.size >= o.capacity) {
+			if (o.capacity == 0) {
+				o.capacity = kDefaultObjectCapacity;
+				o.members = (Member*)allocator.Malloc(o.capacity * sizeof(Member));
+			}
+			else {
+				SizeType oldCapacity = o.capacity;
+				o.capacity *= 2;
+				o.members = (Member*)allocator.Realloc(o.members, oldCapacity * sizeof(Member), o.capacity * sizeof(Member));
+			}
+		}
+		o.members[o.size].name.RawAssign(name);
+		o.members[o.size].value.RawAssign(value);
+		o.size++;
+		return *this;
+	}
+
+	GenericValue& AddMember(const Ch* name, Allocator& nameAllocator, GenericValue& value, Allocator& allocator) {
+		GenericValue n(name, internal::StrLen(name), nameAllocator);
+		return AddMember(n, value, allocator);
+	}
+
+	GenericValue& AddMember(const Ch* name, GenericValue& value, Allocator& allocator) {
+		GenericValue n(name, internal::StrLen(name));
+		return AddMember(n, value, allocator);
+	}
+
+	template <typename T>
+	GenericValue& AddMember(const Ch* name, T value, Allocator& allocator) {
+		GenericValue n(name, internal::StrLen(name));
+		GenericValue v(value);
+		return AddMember(n, v, allocator);
+	}
+
+	//! Remove a member in object by its name.
+	/*! \param name Name of member to be removed.
+	    \return Whether the member existed.
+	    \note Removing member is implemented by moving the last member. So the ordering of members is changed.
+	*/
+	bool RemoveMember(const Ch* name) {
+		RAPIDJSON_ASSERT(IsObject());
+		if (Member* m = FindMember(name)) {
+			RAPIDJSON_ASSERT(data_.o.size > 0);
+			RAPIDJSON_ASSERT(data_.o.members != 0);
+
+			Member* last = data_.o.members + (data_.o.size - 1);
+			if (data_.o.size > 1 && m != last) {
+				// Move the last one to this place
+				m->name = last->name;
+				m->value = last->value;
+			}
+			else {
+				// Only one left, just destroy
+				m->name.~GenericValue();
+				m->value.~GenericValue();
+			}
+			--data_.o.size;
+			return true;
+		}
+		return false;
+	}
+
+	//@}
+
+	//!@name Array
+	//@{
+
+	//! Set this value as an empty array.
+	GenericValue& SetArray() {	this->~GenericValue(); new (this) GenericValue(kArrayType); return *this; }
+
+	//! Get the number of elements in array.
+	SizeType Size() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size; }
+
+	//! Get the capacity of array.
+	SizeType Capacity() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.capacity; }
+
+	//! Check whether the array is empty.
+	bool Empty() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size == 0; }
+
+	//! Remove all elements in the array.
+	/*! This function do not deallocate memory in the array, i.e. the capacity is unchanged.
+	*/
+	void Clear() {
+		RAPIDJSON_ASSERT(IsArray()); 
+		for (SizeType i = 0; i < data_.a.size; ++i)
+			data_.a.elements[i].~GenericValue();
+		data_.a.size = 0;
+	}
+
+	//! Get an element from array by index.
+	/*! \param index Zero-based index of element.
+		\note
+\code
+Value a(kArrayType);
+a.PushBack(123);
+int x = a[0].GetInt();				// Error: operator[ is ambiguous, as 0 also mean a null pointer of const char* type.
+int y = a[SizeType(0)].GetInt();	// Cast to SizeType will work.
+int z = a[0u].GetInt();				// This works too.
+\endcode
+	*/
+	GenericValue& operator[](SizeType index) {
+		RAPIDJSON_ASSERT(IsArray());
+		RAPIDJSON_ASSERT(index < data_.a.size);
+		return data_.a.elements[index];
+	}
+	const GenericValue& operator[](SizeType index) const { return const_cast<GenericValue&>(*this)[index]; }
+
+	//! Element iterator
+	ValueIterator Begin() { RAPIDJSON_ASSERT(IsArray()); return data_.a.elements; }
+	ValueIterator End() { RAPIDJSON_ASSERT(IsArray()); return data_.a.elements + data_.a.size; }
+	ConstValueIterator Begin() const { return const_cast<GenericValue&>(*this).Begin(); }
+	ConstValueIterator End() const { return const_cast<GenericValue&>(*this).End(); }
+
+	//! Request the array to have enough capacity to store elements.
+	/*! \param newCapacity	The capacity that the array at least need to have.
+		\param allocator	The allocator for allocating memory. It must be the same one use previously.
+		\return The value itself for fluent API.
+	*/
+	GenericValue& Reserve(SizeType newCapacity, Allocator &allocator) {
+		RAPIDJSON_ASSERT(IsArray());
+		if (newCapacity > data_.a.capacity) {
+			data_.a.elements = (GenericValue*)allocator.Realloc(data_.a.elements, data_.a.capacity * sizeof(GenericValue), newCapacity * sizeof(GenericValue));
+			data_.a.capacity = newCapacity;
+		}
+		return *this;
+	}
+
+	//! Append a value at the end of the array.
+	/*! \param value		The value to be appended.
+	    \param allocator	The allocator for allocating memory. It must be the same one use previously.
+	    \return The value itself for fluent API.
+	    \note The ownership of the value will be transfered to this object if success.
+	    \note If the number of elements to be appended is known, calls Reserve() once first may be more efficient.
+	*/
+	GenericValue& PushBack(GenericValue& value, Allocator& allocator) {
+		RAPIDJSON_ASSERT(IsArray());
+		if (data_.a.size >= data_.a.capacity)
+			Reserve(data_.a.capacity == 0 ? kDefaultArrayCapacity : data_.a.capacity * 2, allocator);
+		data_.a.elements[data_.a.size++].RawAssign(value);
+		return *this;
+	}
+
+	template <typename T>
+	GenericValue& PushBack(T value, Allocator& allocator) {
+		GenericValue v(value);
+		return PushBack(v, allocator);
+	}
+
+	//! Remove the last element in the array.
+	GenericValue& PopBack() {
+		RAPIDJSON_ASSERT(IsArray());
+		RAPIDJSON_ASSERT(!Empty());
+		data_.a.elements[--data_.a.size].~GenericValue();
+		return *this;
+	}
+	//@}
+
+	//!@name Number
+	//@{
+
+	int GetInt() const			{ RAPIDJSON_ASSERT(flags_ & kIntFlag);   return data_.n.i.i;   }
+	unsigned GetUint() const	{ RAPIDJSON_ASSERT(flags_ & kUintFlag);  return data_.n.u.u;   }
+	int64_t GetInt64() const	{ RAPIDJSON_ASSERT(flags_ & kInt64Flag); return data_.n.i64; }
+	uint64_t GetUint64() const	{ RAPIDJSON_ASSERT(flags_ & kUint64Flag); return data_.n.u64; }
+
+	double GetDouble() const {
+		RAPIDJSON_ASSERT(IsNumber());
+		if ((flags_ & kDoubleFlag) != 0)				return data_.n.d;	// exact type, no conversion.
+		if ((flags_ & kIntFlag) != 0)					return data_.n.i.i;	// int -> double
+		if ((flags_ & kUintFlag) != 0)					return data_.n.u.u;	// unsigned -> double
+		if ((flags_ & kInt64Flag) != 0)					return (double)data_.n.i64; // int64_t -> double (may lose precision)
+		RAPIDJSON_ASSERT((flags_ & kUint64Flag) != 0);	return (double)data_.n.u64;	// uint64_t -> double (may lose precision)
+	}
+
+	GenericValue& SetInt(int i)				{ this->~GenericValue(); new (this) GenericValue(i);	return *this; }
+	GenericValue& SetUint(unsigned u)		{ this->~GenericValue(); new (this) GenericValue(u);	return *this; }
+	GenericValue& SetInt64(int64_t i64)		{ this->~GenericValue(); new (this) GenericValue(i64);	return *this; }
+	GenericValue& SetUint64(uint64_t u64)	{ this->~GenericValue(); new (this) GenericValue(u64);	return *this; }
+	GenericValue& SetDouble(double d)		{ this->~GenericValue(); new (this) GenericValue(d);	return *this; }
+
+	//@}
+
+	//!@name String
+	//@{
+
+	const Ch* GetString() const { RAPIDJSON_ASSERT(IsString()); return data_.s.str; }
+
+	//! Get the length of string.
+	/*! Since rapidjson permits "\u0000" in the json string, strlen(v.GetString()) may not equal to v.GetStringLength().
+	*/
+	SizeType GetStringLength() const { RAPIDJSON_ASSERT(IsString()); return data_.s.length; }
+
+	//! Set this value as a string without copying source string.
+	/*! This version has better performance with supplied length, and also support string containing null character.
+		\param s source string pointer. 
+		\param length The length of source string, excluding the trailing null terminator.
+		\return The value itself for fluent API.
+	*/
+	GenericValue& SetString(const Ch* s, SizeType length) { this->~GenericValue(); SetStringRaw(s, length); return *this; }
+
+	//! Set this value as a string without copying source string.
+	/*! \param s source string pointer. 
+		\return The value itself for fluent API.
+	*/
+	GenericValue& SetString(const Ch* s) { return SetString(s, internal::StrLen(s)); }
+
+	//! Set this value as a string by copying from source string.
+	/*! This version has better performance with supplied length, and also support string containing null character.
+		\param s source string. 
+		\param length The length of source string, excluding the trailing null terminator.
+		\param allocator Allocator for allocating copied buffer. Commonly use document.GetAllocator().
+		\return The value itself for fluent API.
+	*/
+	GenericValue& SetString(const Ch* s, SizeType length, Allocator& allocator) { this->~GenericValue(); SetStringRaw(s, length, allocator); return *this; }
+
+	//! Set this value as a string by copying from source string.
+	/*!	\param s source string. 
+		\param allocator Allocator for allocating copied buffer. Commonly use document.GetAllocator().
+		\return The value itself for fluent API.
+	*/
+	GenericValue& SetString(const Ch* s, Allocator& allocator) {	SetString(s, internal::StrLen(s), allocator); return *this; }
+
+	//@}
+
+	//! Generate events of this value to a Handler.
+	/*! This function adopts the GoF visitor pattern.
+		Typical usage is to output this JSON value as JSON text via Writer, which is a Handler.
+		It can also be used to deep clone this value via GenericDocument, which is also a Handler.
+		\tparam Handler type of handler.
+		\param handler An object implementing concept Handler.
+	*/
+	template <typename Handler>
+	const GenericValue& Accept(Handler& handler) const {
+		switch(GetType()) {
+		case kNullType:		handler.Null(); break;
+		case kFalseType:	handler.Bool(false); break;
+		case kTrueType:		handler.Bool(true); break;
+
+		case kObjectType:
+			handler.StartObject();
+			for (Member* m = data_.o.members; m != data_.o.members + data_.o.size; ++m) {
+				handler.String(m->name.data_.s.str, m->name.data_.s.length, false);
+				m->value.Accept(handler);
+			}
+			handler.EndObject(data_.o.size);
+			break;
+
+		case kArrayType:
+			handler.StartArray();
+			for (GenericValue* v = data_.a.elements; v != data_.a.elements + data_.a.size; ++v)
+				v->Accept(handler);
+			handler.EndArray(data_.a.size);
+			break;
+
+		case kStringType:
+			handler.String(data_.s.str, data_.s.length, false);
+			break;
+
+		case kNumberType:
+			if (IsInt())			handler.Int(data_.n.i.i);
+			else if (IsUint())		handler.Uint(data_.n.u.u);
+			else if (IsInt64())		handler.Int64(data_.n.i64);
+			else if (IsUint64())	handler.Uint64(data_.n.u64);
+			else					handler.Double(data_.n.d);
+			break;
+		}
+		return *this;
+	}
+
+private:
+	template <typename, typename>
+	friend class GenericDocument;
+
+	enum {
+		kBoolFlag = 0x100,
+		kNumberFlag = 0x200,
+		kIntFlag = 0x400,
+		kUintFlag = 0x800,
+		kInt64Flag = 0x1000,
+		kUint64Flag = 0x2000,
+		kDoubleFlag = 0x4000,
+		kStringFlag = 0x100000,
+		kCopyFlag = 0x200000,
+
+		// Initial flags of different types.
+		kNullFlag = kNullType,
+		kTrueFlag = kTrueType | kBoolFlag,
+		kFalseFlag = kFalseType | kBoolFlag,
+		kNumberIntFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag,
+		kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag | kInt64Flag,
+		kNumberInt64Flag = kNumberType | kNumberFlag | kInt64Flag,
+		kNumberUint64Flag = kNumberType | kNumberFlag | kUint64Flag,
+		kNumberDoubleFlag = kNumberType | kNumberFlag | kDoubleFlag,
+		kConstStringFlag = kStringType | kStringFlag,
+		kCopyStringFlag = kStringType | kStringFlag | kCopyFlag,
+		kObjectFlag = kObjectType,
+		kArrayFlag = kArrayType,
+
+		kTypeMask = 0xFF	// bitwise-and with mask of 0xFF can be optimized by compiler
+	};
+
+	static const SizeType kDefaultArrayCapacity = 16;
+	static const SizeType kDefaultObjectCapacity = 16;
+
+	struct String {
+		const Ch* str;
+		SizeType length;
+		unsigned hashcode;	//!< reserved
+	};	// 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+	// By using proper binary layout, retrieval of different integer types do not need conversions.
+	union Number {
+#if RAPIDJSON_ENDIAN == RAPIDJSON_LITTLEENDIAN
+		struct I {
+			int i;
+			char padding[4];
+		}i;
+		struct U {
+			unsigned u;
+			char padding2[4];
+		}u;
+#else
+		struct I {
+			char padding[4];
+			int i;
+		}i;
+		struct U {
+			char padding2[4];
+			unsigned u;
+		}u;
+#endif
+		int64_t i64;
+		uint64_t u64;
+		double d;
+	};	// 8 bytes
+
+	struct Object {
+		Member* members;
+		SizeType size;
+		SizeType capacity;
+	};	// 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+	struct Array {
+		GenericValue<Encoding, Allocator>* elements;
+		SizeType size;
+		SizeType capacity;
+	};	// 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+	union Data {
+		String s;
+		Number n;
+		Object o;
+		Array a;
+	};	// 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+	//! Find member by name.
+	Member* FindMember(const Ch* name) {
+		RAPIDJSON_ASSERT(name);
+		RAPIDJSON_ASSERT(IsObject());
+
+		SizeType length = internal::StrLen(name);
+
+		Object& o = data_.o;
+		for (Member* member = o.members; member != data_.o.members + data_.o.size; ++member)
+			if (length == member->name.data_.s.length && memcmp(member->name.data_.s.str, name, length * sizeof(Ch)) == 0)
+				return member;
+
+		return 0;
+	}
+	const Member* FindMember(const Ch* name) const { return const_cast<GenericValue&>(*this).FindMember(name); }
+
+	// Initialize this value as array with initial data, without calling destructor.
+	void SetArrayRaw(GenericValue* values, SizeType count, Allocator& alloctaor) {
+		flags_ = kArrayFlag;
+		data_.a.elements = (GenericValue*)alloctaor.Malloc(count * sizeof(GenericValue));
+		memcpy(data_.a.elements, values, count * sizeof(GenericValue));
+		data_.a.size = data_.a.capacity = count;
+	}
+
+	//! Initialize this value as object with initial data, without calling destructor.
+	void SetObjectRaw(Member* members, SizeType count, Allocator& alloctaor) {
+		flags_ = kObjectFlag;
+		data_.o.members = (Member*)alloctaor.Malloc(count * sizeof(Member));
+		memcpy(data_.o.members, members, count * sizeof(Member));
+		data_.o.size = data_.o.capacity = count;
+	}
+
+	//! Initialize this value as constant string, without calling destructor.
+	void SetStringRaw(const Ch* s, SizeType length) {
+		RAPIDJSON_ASSERT(s != NULL);
+		flags_ = kConstStringFlag;
+		data_.s.str = s;
+		data_.s.length = length;
+	}
+
+	//! Initialize this value as copy string with initial data, without calling destructor.
+	void SetStringRaw(const Ch* s, SizeType length, Allocator& allocator) {
+		RAPIDJSON_ASSERT(s != NULL);
+		flags_ = kCopyStringFlag;
+		data_.s.str = (Ch *)allocator.Malloc((length + 1) * sizeof(Ch));
+		data_.s.length = length;
+		memcpy(const_cast<Ch*>(data_.s.str), s, length * sizeof(Ch));
+		const_cast<Ch*>(data_.s.str)[length] = '\0';
+	}
+
+	//! Assignment without calling destructor
+	void RawAssign(GenericValue& rhs) {
+		memcpy(this, &rhs, sizeof(GenericValue));
+		rhs.flags_ = kNullFlag;
+	}
+
+	Data data_;
+	unsigned flags_;
+};
+#pragma pack (pop)
+
+//! Value with UTF8 encoding.
+typedef GenericValue<UTF8<> > Value;
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericDocument 
+
+//! A document for parsing JSON text as DOM.
+/*!
+	\implements Handler
+	\tparam Encoding encoding for both parsing and string storage.
+	\tparam Alloactor allocator for allocating memory for the DOM, and the stack during parsing.
+*/
+template <typename Encoding, typename Allocator = MemoryPoolAllocator<> >
+class GenericDocument : public GenericValue<Encoding, Allocator> {
+public:
+	typedef typename Encoding::Ch Ch;						//!< Character type derived from Encoding.
+	typedef GenericValue<Encoding, Allocator> ValueType;	//!< Value type of the document.
+	typedef Allocator AllocatorType;						//!< Allocator type from template parameter.
+
+	//! Constructor
+	/*! \param allocator		Optional allocator for allocating stack memory.
+		\param stackCapacity	Initial capacity of stack in bytes.
+	*/
+	GenericDocument(Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity) : stack_(allocator, stackCapacity), parseError_(0), errorOffset_(0) {}
+
+	//! Parse JSON text from an input stream.
+	/*! \tparam parseFlags Combination of ParseFlag.
+		\param stream Input stream to be parsed.
+		\return The document itself for fluent API.
+	*/
+	template <unsigned parseFlags, typename Stream>
+	GenericDocument& ParseStream(Stream& stream) {
+		ValueType::SetNull(); // Remove existing root if exist
+		GenericReader<Encoding, Allocator> reader;
+		if (reader.template Parse<parseFlags>(stream, *this)) {
+			RAPIDJSON_ASSERT(stack_.GetSize() == sizeof(ValueType)); // Got one and only one root object
+			this->RawAssign(*stack_.template Pop<ValueType>(1));	// Add this-> to prevent issue 13.
+			parseError_ = 0;
+			errorOffset_ = 0;
+		}
+		else {
+			parseError_ = reader.GetParseError();
+			errorOffset_ = reader.GetErrorOffset();
+			ClearStack();
+		}
+		return *this;
+	}
+
+	//! Parse JSON text from a mutable string.
+	/*! \tparam parseFlags Combination of ParseFlag.
+		\param str Mutable zero-terminated string to be parsed.
+		\return The document itself for fluent API.
+	*/
+	template <unsigned parseFlags>
+	GenericDocument& ParseInsitu(Ch* str) {
+		GenericInsituStringStream<Encoding> s(str);
+		return ParseStream<parseFlags | kParseInsituFlag>(s);
+	}
+
+	//! Parse JSON text from a read-only string.
+	/*! \tparam parseFlags Combination of ParseFlag (must not contain kParseInsituFlag).
+		\param str Read-only zero-terminated string to be parsed.
+	*/
+	template <unsigned parseFlags>
+	GenericDocument& Parse(const Ch* str) {
+		RAPIDJSON_ASSERT(!(parseFlags & kParseInsituFlag));
+		GenericStringStream<Encoding> s(str);
+		return ParseStream<parseFlags>(s);
+	}
+
+	//! Whether a parse error was occured in the last parsing.
+	bool HasParseError() const { return parseError_ != 0; }
+
+	//! Get the message of parsing error.
+	const char* GetParseError() const { return parseError_; }
+
+	//! Get the offset in character of the parsing error.
+	size_t GetErrorOffset() const { return errorOffset_; }
+
+	//! Get the allocator of this document.
+	Allocator& GetAllocator() {	return stack_.GetAllocator(); }
+
+	//! Get the capacity of stack in bytes.
+	size_t GetStackCapacity() const { return stack_.GetCapacity(); }
+
+private:
+	// Prohibit assignment
+	GenericDocument& operator=(const GenericDocument&);
+
+	friend class GenericReader<Encoding, Allocator>;	// for Reader to call the following private handler functions
+
+	// Implementation of Handler
+	void Null()	{ new (stack_.template Push<ValueType>()) ValueType(); }
+	void Bool(bool b) { new (stack_.template Push<ValueType>()) ValueType(b); }
+	void Int(int i) { new (stack_.template Push<ValueType>()) ValueType(i); }
+	void Uint(unsigned i) { new (stack_.template Push<ValueType>()) ValueType(i); }
+	void Int64(int64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); }
+	void Uint64(uint64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); }
+	void Double(double d) { new (stack_.template Push<ValueType>()) ValueType(d); }
+
+	void String(const Ch* str, SizeType length, bool copy) { 
+		if (copy) 
+			new (stack_.template Push<ValueType>()) ValueType(str, length, GetAllocator());
+		else
+			new (stack_.template Push<ValueType>()) ValueType(str, length);
+	}
+
+	void StartObject() { new (stack_.template Push<ValueType>()) ValueType(kObjectType); }
+	
+	void EndObject(SizeType memberCount) {
+		typename ValueType::Member* members = stack_.template Pop<typename ValueType::Member>(memberCount);
+		stack_.template Top<ValueType>()->SetObjectRaw(members, (SizeType)memberCount, GetAllocator());
+	}
+
+	void StartArray() { new (stack_.template Push<ValueType>()) ValueType(kArrayType); }
+	
+	void EndArray(SizeType elementCount) {
+		ValueType* elements = stack_.template Pop<ValueType>(elementCount);
+		stack_.template Top<ValueType>()->SetArrayRaw(elements, elementCount, GetAllocator());
+	}
+
+	void ClearStack() {
+		if (Allocator::kNeedFree)
+			while (stack_.GetSize() > 0)	// Here assumes all elements in stack array are GenericValue (Member is actually 2 GenericValue objects)
+				(stack_.template Pop<ValueType>(1))->~ValueType();
+		else
+			stack_.Clear();
+	}
+
+	static const size_t kDefaultStackCapacity = 1024;
+	internal::Stack<Allocator> stack_;
+	const char* parseError_;
+	size_t errorOffset_;
+};
+
+typedef GenericDocument<UTF8<> > Document;
+
+} // namespace rapidjson
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif // RAPIDJSON_DOCUMENT_H_

third-party/rapidjson/filestream.h

@@ -0,0 +1,46 @@
+#ifndef RAPIDJSON_FILESTREAM_H_
+#define RAPIDJSON_FILESTREAM_H_
+
+#include <cstdio>
+
+namespace rapidjson {
+
+//! Wrapper of C file stream for input or output.
+/*!
+	This simple wrapper does not check the validity of the stream.
+	\implements Stream
+*/
+class FileStream {
+public:
+	typedef char Ch;	//!< Character type. Only support char.
+
+	FileStream(FILE* fp) : fp_(fp), count_(0) { Read(); }
+	char Peek() const { return current_; }
+	char Take() { char c = current_; Read(); return c; }
+	size_t Tell() const { return count_; }
+	void Put(char c) { fputc(c, fp_); }
+
+	// Not implemented
+	char* PutBegin() { return 0; }
+	size_t PutEnd(char*) { return 0; }
+
+private:
+	void Read() {
+		RAPIDJSON_ASSERT(fp_ != 0);
+		int c = fgetc(fp_);
+		if (c != EOF) {
+			current_ = (char)c;
+			count_++;
+		}
+		else
+			current_ = '\0';
+	}
+
+	FILE* fp_;
+	char current_;
+	size_t count_;
+};
+
+} // namespace rapidjson
+
+#endif // RAPIDJSON_FILESTREAM_H_

third-party/rapidjson/internal/pow10.h

@@ -0,0 +1,54 @@
+#ifndef RAPIDJSON_POW10_
+#define RAPIDJSON_POW10_
+
+namespace rapidjson {
+namespace internal {
+
+//! Computes integer powers of 10 in double (10.0^n).
+/*! This function uses lookup table for fast and accurate results.
+	\param n positive/negative exponent. Must <= 308.
+	\return 10.0^n
+*/
+inline double Pow10(int n) {
+	static const double e[] = { // 1e-308...1e308: 617 * 8 bytes = 4936 bytes
+		1e-308,1e-307,1e-306,1e-305,1e-304,1e-303,1e-302,1e-301,1e-300,
+		1e-299,1e-298,1e-297,1e-296,1e-295,1e-294,1e-293,1e-292,1e-291,1e-290,1e-289,1e-288,1e-287,1e-286,1e-285,1e-284,1e-283,1e-282,1e-281,1e-280,
+		1e-279,1e-278,1e-277,1e-276,1e-275,1e-274,1e-273,1e-272,1e-271,1e-270,1e-269,1e-268,1e-267,1e-266,1e-265,1e-264,1e-263,1e-262,1e-261,1e-260,
+		1e-259,1e-258,1e-257,1e-256,1e-255,1e-254,1e-253,1e-252,1e-251,1e-250,1e-249,1e-248,1e-247,1e-246,1e-245,1e-244,1e-243,1e-242,1e-241,1e-240,
+		1e-239,1e-238,1e-237,1e-236,1e-235,1e-234,1e-233,1e-232,1e-231,1e-230,1e-229,1e-228,1e-227,1e-226,1e-225,1e-224,1e-223,1e-222,1e-221,1e-220,
+		1e-219,1e-218,1e-217,1e-216,1e-215,1e-214,1e-213,1e-212,1e-211,1e-210,1e-209,1e-208,1e-207,1e-206,1e-205,1e-204,1e-203,1e-202,1e-201,1e-200,
+		1e-199,1e-198,1e-197,1e-196,1e-195,1e-194,1e-193,1e-192,1e-191,1e-190,1e-189,1e-188,1e-187,1e-186,1e-185,1e-184,1e-183,1e-182,1e-181,1e-180,
+		1e-179,1e-178,1e-177,1e-176,1e-175,1e-174,1e-173,1e-172,1e-171,1e-170,1e-169,1e-168,1e-167,1e-166,1e-165,1e-164,1e-163,1e-162,1e-161,1e-160,
+		1e-159,1e-158,1e-157,1e-156,1e-155,1e-154,1e-153,1e-152,1e-151,1e-150,1e-149,1e-148,1e-147,1e-146,1e-145,1e-144,1e-143,1e-142,1e-141,1e-140,
+		1e-139,1e-138,1e-137,1e-136,1e-135,1e-134,1e-133,1e-132,1e-131,1e-130,1e-129,1e-128,1e-127,1e-126,1e-125,1e-124,1e-123,1e-122,1e-121,1e-120,
+		1e-119,1e-118,1e-117,1e-116,1e-115,1e-114,1e-113,1e-112,1e-111,1e-110,1e-109,1e-108,1e-107,1e-106,1e-105,1e-104,1e-103,1e-102,1e-101,1e-100,
+		1e-99, 1e-98, 1e-97, 1e-96, 1e-95, 1e-94, 1e-93, 1e-92, 1e-91, 1e-90, 1e-89, 1e-88, 1e-87, 1e-86, 1e-85, 1e-84, 1e-83, 1e-82, 1e-81, 1e-80, 
+		1e-79, 1e-78, 1e-77, 1e-76, 1e-75, 1e-74, 1e-73, 1e-72, 1e-71, 1e-70, 1e-69, 1e-68, 1e-67, 1e-66, 1e-65, 1e-64, 1e-63, 1e-62, 1e-61, 1e-60, 
+		1e-59, 1e-58, 1e-57, 1e-56, 1e-55, 1e-54, 1e-53, 1e-52, 1e-51, 1e-50, 1e-49, 1e-48, 1e-47, 1e-46, 1e-45, 1e-44, 1e-43, 1e-42, 1e-41, 1e-40, 
+		1e-39, 1e-38, 1e-37, 1e-36, 1e-35, 1e-34, 1e-33, 1e-32, 1e-31, 1e-30, 1e-29, 1e-28, 1e-27, 1e-26, 1e-25, 1e-24, 1e-23, 1e-22, 1e-21, 1e-20, 
+		1e-19, 1e-18, 1e-17, 1e-16, 1e-15, 1e-14, 1e-13, 1e-12, 1e-11, 1e-10, 1e-9,  1e-8,  1e-7,  1e-6,  1e-5,  1e-4,  1e-3,  1e-2,  1e-1,  1e+0,  
+		1e+1,  1e+2,  1e+3,  1e+4,  1e+5,  1e+6,  1e+7,  1e+8,  1e+9,  1e+10, 1e+11, 1e+12, 1e+13, 1e+14, 1e+15, 1e+16, 1e+17, 1e+18, 1e+19, 1e+20, 
+		1e+21, 1e+22, 1e+23, 1e+24, 1e+25, 1e+26, 1e+27, 1e+28, 1e+29, 1e+30, 1e+31, 1e+32, 1e+33, 1e+34, 1e+35, 1e+36, 1e+37, 1e+38, 1e+39, 1e+40,
+		1e+41, 1e+42, 1e+43, 1e+44, 1e+45, 1e+46, 1e+47, 1e+48, 1e+49, 1e+50, 1e+51, 1e+52, 1e+53, 1e+54, 1e+55, 1e+56, 1e+57, 1e+58, 1e+59, 1e+60,
+		1e+61, 1e+62, 1e+63, 1e+64, 1e+65, 1e+66, 1e+67, 1e+68, 1e+69, 1e+70, 1e+71, 1e+72, 1e+73, 1e+74, 1e+75, 1e+76, 1e+77, 1e+78, 1e+79, 1e+80,
+		1e+81, 1e+82, 1e+83, 1e+84, 1e+85, 1e+86, 1e+87, 1e+88, 1e+89, 1e+90, 1e+91, 1e+92, 1e+93, 1e+94, 1e+95, 1e+96, 1e+97, 1e+98, 1e+99, 1e+100,
+		1e+101,1e+102,1e+103,1e+104,1e+105,1e+106,1e+107,1e+108,1e+109,1e+110,1e+111,1e+112,1e+113,1e+114,1e+115,1e+116,1e+117,1e+118,1e+119,1e+120,
+		1e+121,1e+122,1e+123,1e+124,1e+125,1e+126,1e+127,1e+128,1e+129,1e+130,1e+131,1e+132,1e+133,1e+134,1e+135,1e+136,1e+137,1e+138,1e+139,1e+140,
+		1e+141,1e+142,1e+143,1e+144,1e+145,1e+146,1e+147,1e+148,1e+149,1e+150,1e+151,1e+152,1e+153,1e+154,1e+155,1e+156,1e+157,1e+158,1e+159,1e+160,
+		1e+161,1e+162,1e+163,1e+164,1e+165,1e+166,1e+167,1e+168,1e+169,1e+170,1e+171,1e+172,1e+173,1e+174,1e+175,1e+176,1e+177,1e+178,1e+179,1e+180,
+		1e+181,1e+182,1e+183,1e+184,1e+185,1e+186,1e+187,1e+188,1e+189,1e+190,1e+191,1e+192,1e+193,1e+194,1e+195,1e+196,1e+197,1e+198,1e+199,1e+200,
+		1e+201,1e+202,1e+203,1e+204,1e+205,1e+206,1e+207,1e+208,1e+209,1e+210,1e+211,1e+212,1e+213,1e+214,1e+215,1e+216,1e+217,1e+218,1e+219,1e+220,
+		1e+221,1e+222,1e+223,1e+224,1e+225,1e+226,1e+227,1e+228,1e+229,1e+230,1e+231,1e+232,1e+233,1e+234,1e+235,1e+236,1e+237,1e+238,1e+239,1e+240,
+		1e+241,1e+242,1e+243,1e+244,1e+245,1e+246,1e+247,1e+248,1e+249,1e+250,1e+251,1e+252,1e+253,1e+254,1e+255,1e+256,1e+257,1e+258,1e+259,1e+260,
+		1e+261,1e+262,1e+263,1e+264,1e+265,1e+266,1e+267,1e+268,1e+269,1e+270,1e+271,1e+272,1e+273,1e+274,1e+275,1e+276,1e+277,1e+278,1e+279,1e+280,
+		1e+281,1e+282,1e+283,1e+284,1e+285,1e+286,1e+287,1e+288,1e+289,1e+290,1e+291,1e+292,1e+293,1e+294,1e+295,1e+296,1e+297,1e+298,1e+299,1e+300,
+		1e+301,1e+302,1e+303,1e+304,1e+305,1e+306,1e+307,1e+308
+	};
+	RAPIDJSON_ASSERT(n <= 308);
+	return n < -308 ? 0.0 : e[n + 308];
+}
+
+} // namespace internal
+} // namespace rapidjson
+
+#endif // RAPIDJSON_POW10_

third-party/rapidjson/internal/stack.h

@@ -0,0 +1,82 @@
+#ifndef RAPIDJSON_INTERNAL_STACK_H_
+#define RAPIDJSON_INTERNAL_STACK_H_
+
+namespace rapidjson {
+namespace internal {
+
+///////////////////////////////////////////////////////////////////////////////
+// Stack
+
+//! A type-unsafe stack for storing different types of data.
+/*! \tparam Allocator Allocator for allocating stack memory.
+*/
+template <typename Allocator>
+class Stack {
+public:
+	Stack(Allocator* allocator, size_t stack_capacity) : allocator_(allocator), own_allocator_(0), stack_(0), stack_top_(0), stack_end_(0), stack_capacity_(stack_capacity) {
+		RAPIDJSON_ASSERT(stack_capacity_ > 0);
+		if (!allocator_)
+			own_allocator_ = allocator_ = new Allocator();
+		stack_top_ = stack_ = (char*)allocator_->Malloc(stack_capacity_);
+		stack_end_ = stack_ + stack_capacity_;
+	}
+
+	~Stack() {
+		Allocator::Free(stack_);
+		delete own_allocator_; // Only delete if it is owned by the stack
+	}
+
+	void Clear() { /*stack_top_ = 0;*/ stack_top_ = stack_; }
+
+	template<typename T>
+	T* Push(size_t count = 1) {
+		 // Expand the stack if needed
+		if (stack_top_ + sizeof(T) * count >= stack_end_) {
+			size_t new_capacity = stack_capacity_ * 2;
+			size_t size = GetSize();
+			size_t new_size = GetSize() + sizeof(T) * count;
+			if (new_capacity < new_size)
+				new_capacity = new_size;
+			stack_ = (char*)allocator_->Realloc(stack_, stack_capacity_, new_capacity);
+			stack_capacity_ = new_capacity;
+			stack_top_ = stack_ + size;
+			stack_end_ = stack_ + stack_capacity_;
+		}
+		T* ret = (T*)stack_top_;
+		stack_top_ += sizeof(T) * count;
+		return ret;
+	}
+
+	template<typename T>
+	T* Pop(size_t count) {
+		RAPIDJSON_ASSERT(GetSize() >= count * sizeof(T));
+		stack_top_ -= count * sizeof(T);
+		return (T*)stack_top_;
+	}
+
+	template<typename T>
+	T* Top() { 
+		RAPIDJSON_ASSERT(GetSize() >= sizeof(T));
+		return (T*)(stack_top_ - sizeof(T));
+	}
+
+	template<typename T>
+	T* Bottom() { return (T*)stack_; }
+
+	Allocator& GetAllocator() { return *allocator_; }
+	size_t GetSize() const { return stack_top_ - stack_; }
+	size_t GetCapacity() const { return stack_capacity_; }
+
+private:
+	Allocator* allocator_;
+	Allocator* own_allocator_;
+	char *stack_;
+	char *stack_top_;
+	char *stack_end_;
+	size_t stack_capacity_;
+};
+
+} // namespace internal
+} // namespace rapidjson
+
+#endif // RAPIDJSON_STACK_H_

third-party/rapidjson/internal/strfunc.h

@@ -0,0 +1,24 @@
+#ifndef RAPIDJSON_INTERNAL_STRFUNC_H_
+#define RAPIDJSON_INTERNAL_STRFUNC_H_
+
+namespace rapidjson {
+namespace internal {
+
+//! Custom strlen() which works on different character types.
+/*!	\tparam Ch Character type (e.g. char, wchar_t, short)
+	\param s Null-terminated input string.
+	\return Number of characters in the string. 
+	\note This has the same semantics as strlen(), the return value is not number of Unicode codepoints.
+*/
+template <typename Ch>
+inline SizeType StrLen(const Ch* s) {
+	const Ch* p = s;
+	while (*p != '\0')
+		++p;
+	return SizeType(p - s);
+}
+
+} // namespace internal
+} // namespace rapidjson
+
+#endif // RAPIDJSON_INTERNAL_STRFUNC_H_

third-party/rapidjson/license.txt

@@ -0,0 +1,19 @@
+Copyright (C) 2011 Milo Yip
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

third-party/rapidjson/prettywriter.h

@@ -0,0 +1,156 @@
+#ifndef RAPIDJSON_PRETTYWRITER_H_
+#define RAPIDJSON_PRETTYWRITER_H_
+
+#include "writer.h"
+
+namespace rapidjson {
+
+//! Writer with indentation and spacing.
+/*!
+	\tparam Stream Type of ouptut stream.
+	\tparam Encoding Encoding of both source strings and output.
+	\tparam Allocator Type of allocator for allocating memory of stack.
+*/
+template<typename Stream, typename Encoding = UTF8<>, typename Allocator = MemoryPoolAllocator<> >
+class PrettyWriter : public Writer<Stream, Encoding, Allocator> {
+public:
+	typedef Writer<Stream, Encoding, Allocator> Base;
+	typedef typename Base::Ch Ch;
+
+	//! Constructor
+	/*! \param stream Output stream.
+		\param allocator User supplied allocator. If it is null, it will create a private one.
+		\param levelDepth Initial capacity of 
+	*/
+	PrettyWriter(Stream& stream, Allocator* allocator = 0, size_t levelDepth = Base::kDefaultLevelDepth) : 
+		Base(stream, allocator, levelDepth), indentChar_(' '), indentCharCount_(4) {}
+
+	//! Set custom indentation.
+	/*! \param indentChar		Character for indentation. Must be whitespace character (' ', '\t', '\n', '\r').
+		\param indentCharCount	Number of indent characters for each indentation level.
+		\note The default indentation is 4 spaces.
+	*/
+	PrettyWriter& SetIndent(Ch indentChar, unsigned indentCharCount) {
+		RAPIDJSON_ASSERT(indentChar == ' ' || indentChar == '\t' || indentChar == '\n' || indentChar == '\r');
+		indentChar_ = indentChar;
+		indentCharCount_ = indentCharCount;
+		return *this;
+	}
+
+	//@name Implementation of Handler.
+	//@{
+
+	PrettyWriter& Null()				{ PrettyPrefix(kNullType);   Base::WriteNull();			return *this; }
+	PrettyWriter& Bool(bool b)			{ PrettyPrefix(b ? kTrueType : kFalseType); Base::WriteBool(b); return *this; }
+	PrettyWriter& Int(int i)			{ PrettyPrefix(kNumberType); Base::WriteInt(i);			return *this; }
+	PrettyWriter& Uint(unsigned u)		{ PrettyPrefix(kNumberType); Base::WriteUint(u);		return *this; }
+	PrettyWriter& Int64(int64_t i64)	{ PrettyPrefix(kNumberType); Base::WriteInt64(i64);		return *this; }
+	PrettyWriter& Uint64(uint64_t u64)	{ PrettyPrefix(kNumberType); Base::WriteUint64(u64);	return *this; }
+	PrettyWriter& Double(double d)		{ PrettyPrefix(kNumberType); Base::WriteDouble(d);		return *this; }
+
+	PrettyWriter& String(const Ch* str, SizeType length, bool copy = false) {
+		(void)copy;
+		PrettyPrefix(kStringType);
+		Base::WriteString(str, length);
+		return *this;
+	}
+
+	PrettyWriter& StartObject() {
+		PrettyPrefix(kObjectType);
+		new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(false);
+		Base::WriteStartObject();
+		return *this;
+	}
+
+	PrettyWriter& EndObject(SizeType memberCount = 0) {
+		(void)memberCount;
+		RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
+		RAPIDJSON_ASSERT(!Base::level_stack_.template Top<typename Base::Level>()->inArray);
+		bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
+
+		if (!empty) {
+			Base::stream_.Put('\n');
+			WriteIndent();
+		}
+		Base::WriteEndObject();
+		return *this;
+	}
+
+	PrettyWriter& StartArray() {
+		PrettyPrefix(kArrayType);
+		new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(true);
+		Base::WriteStartArray();
+		return *this;
+	}
+
+	PrettyWriter& EndArray(SizeType memberCount = 0) {
+		(void)memberCount;
+		RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
+		RAPIDJSON_ASSERT(Base::level_stack_.template Top<typename Base::Level>()->inArray);
+		bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
+
+		if (!empty) {
+			Base::stream_.Put('\n');
+			WriteIndent();
+		}
+		Base::WriteEndArray();
+		return *this;
+	}
+
+	//@}
+
+	//! Simpler but slower overload.
+	PrettyWriter& String(const Ch* str) { return String(str, internal::StrLen(str)); }
+
+protected:
+	void PrettyPrefix(Type type) {
+		(void)type;
+		if (Base::level_stack_.GetSize() != 0) { // this value is not at root
+			typename Base::Level* level = Base::level_stack_.template Top<typename Base::Level>();
+
+			if (level->inArray) {
+				if (level->valueCount > 0) {
+					Base::stream_.Put(','); // add comma if it is not the first element in array
+					Base::stream_.Put('\n');
+				}
+				else
+					Base::stream_.Put('\n');
+				WriteIndent();
+			}
+			else {	// in object
+				if (level->valueCount > 0) {
+					if (level->valueCount % 2 == 0) {
+						Base::stream_.Put(',');
+						Base::stream_.Put('\n');
+					}
+					else {
+						Base::stream_.Put(':');
+						Base::stream_.Put(' ');
+					}
+				}
+				else
+					Base::stream_.Put('\n');
+
+				if (level->valueCount % 2 == 0)
+					WriteIndent();
+			}
+			if (!level->inArray && level->valueCount % 2 == 0)
+				RAPIDJSON_ASSERT(type == kStringType);  // if it's in object, then even number should be a name
+			level->valueCount++;
+		}
+		else
+			RAPIDJSON_ASSERT(type == kObjectType || type == kArrayType);
+	}
+
+	void WriteIndent()  {
+		size_t count = (Base::level_stack_.GetSize() / sizeof(typename Base::Level)) * indentCharCount_;
+		PutN(Base::stream_, indentChar_, count);
+	}
+
+	Ch indentChar_;
+	unsigned indentCharCount_;
+};
+
+} // namespace rapidjson
+
+#endif // RAPIDJSON_RAPIDJSON_H_

third-party/rapidjson/rapidjson.h

@@ -0,0 +1,525 @@
+#ifndef RAPIDJSON_RAPIDJSON_H_
+#define RAPIDJSON_RAPIDJSON_H_
+
+// Copyright (c) 2011-2012 Milo Yip (miloyip@gmail.com)
+// Version 0.11
+
+#include <cstdlib>	// malloc(), realloc(), free()
+#include <cstring>	// memcpy()
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_NO_INT64DEFINE
+
+// Here defines int64_t and uint64_t types in global namespace.
+// If user have their own definition, can define RAPIDJSON_NO_INT64DEFINE to disable this.
+#ifndef RAPIDJSON_NO_INT64DEFINE
+#ifdef _MSC_VER
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#else
+#include <inttypes.h>
+#endif
+#endif // RAPIDJSON_NO_INT64TYPEDEF
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ENDIAN
+#define RAPIDJSON_LITTLEENDIAN	0	//!< Little endian machine
+#define RAPIDJSON_BIGENDIAN		1	//!< Big endian machine
+
+//! Endianness of the machine.
+/*!	GCC provided macro for detecting endianness of the target machine. But other
+	compilers may not have this. User can define RAPIDJSON_ENDIAN to either
+	RAPIDJSON_LITTLEENDIAN or RAPIDJSON_BIGENDIAN.
+*/
+#ifndef RAPIDJSON_ENDIAN
+#ifdef __BYTE_ORDER__
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#else
+#define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
+#endif // __BYTE_ORDER__
+#else
+#define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN	// Assumes little endian otherwise.
+#endif
+#endif // RAPIDJSON_ENDIAN
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_SSE2/RAPIDJSON_SSE42/RAPIDJSON_SIMD
+
+// Enable SSE2 optimization.
+//#define RAPIDJSON_SSE2
+
+// Enable SSE4.2 optimization.
+//#define RAPIDJSON_SSE42
+
+#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42)
+#define RAPIDJSON_SIMD
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_NO_SIZETYPEDEFINE
+
+#ifndef RAPIDJSON_NO_SIZETYPEDEFINE
+namespace rapidjson {
+//! Use 32-bit array/string indices even for 64-bit platform, instead of using size_t.
+/*! User may override the SizeType by defining RAPIDJSON_NO_SIZETYPEDEFINE.
+*/
+typedef unsigned SizeType;
+} // namespace rapidjson
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ASSERT
+
+//! Assertion.
+/*! By default, rapidjson uses C assert() for assertion.
+	User can override it by defining RAPIDJSON_ASSERT(x) macro.
+*/
+#ifndef RAPIDJSON_ASSERT
+#include <cassert>
+#define RAPIDJSON_ASSERT(x) assert(x)
+#endif // RAPIDJSON_ASSERT
+
+///////////////////////////////////////////////////////////////////////////////
+// Helpers
+
+#define RAPIDJSON_MULTILINEMACRO_BEGIN do {  
+#define RAPIDJSON_MULTILINEMACRO_END \
+} while((void)0, 0)
+
+namespace rapidjson {
+
+///////////////////////////////////////////////////////////////////////////////
+// Allocator
+
+/*! \class rapidjson::Allocator
+	\brief Concept for allocating, resizing and freeing memory block.
+	
+	Note that Malloc() and Realloc() are non-static but Free() is static.
+	
+	So if an allocator need to support Free(), it needs to put its pointer in 
+	the header of memory block.
+
+\code
+concept Allocator {
+	static const bool kNeedFree;	//!< Whether this allocator needs to call Free().
+
+	// Allocate a memory block.
+	// \param size of the memory block in bytes.
+	// \returns pointer to the memory block.
+	void* Malloc(size_t size);
+
+	// Resize a memory block.
+	// \param originalPtr The pointer to current memory block. Null pointer is permitted.
+	// \param originalSize The current size in bytes. (Design issue: since some allocator may not book-keep this, explicitly pass to it can save memory.)
+	// \param newSize the new size in bytes.
+	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize);
+
+	// Free a memory block.
+	// \param pointer to the memory block. Null pointer is permitted.
+	static void Free(void *ptr);
+};
+\endcode
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+// CrtAllocator
+
+//! C-runtime library allocator.
+/*! This class is just wrapper for standard C library memory routines.
+	\implements Allocator
+*/
+class CrtAllocator {
+public:
+	static const bool kNeedFree = true;
+	void* Malloc(size_t size) { return malloc(size); }
+	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) { (void)originalSize; return realloc(originalPtr, newSize); }
+	static void Free(void *ptr) { free(ptr); }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// MemoryPoolAllocator
+
+//! Default memory allocator used by the parser and DOM.
+/*! This allocator allocate memory blocks from pre-allocated memory chunks. 
+
+    It does not free memory blocks. And Realloc() only allocate new memory.
+
+    The memory chunks are allocated by BaseAllocator, which is CrtAllocator by default.
+
+    User may also supply a buffer as the first chunk.
+
+    If the user-buffer is full then additional chunks are allocated by BaseAllocator.
+
+    The user-buffer is not deallocated by this allocator.
+
+    \tparam BaseAllocator the allocator type for allocating memory chunks. Default is CrtAllocator.
+	\implements Allocator
+*/
+template <typename BaseAllocator = CrtAllocator>
+class MemoryPoolAllocator {
+public:
+	static const bool kNeedFree = false;	//!< Tell users that no need to call Free() with this allocator. (concept Allocator)
+
+	//! Constructor with chunkSize.
+	/*! \param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
+		\param baseAllocator The allocator for allocating memory chunks.
+	*/
+	MemoryPoolAllocator(size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) : 
+		chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(0), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
+	{
+		if (!baseAllocator_)
+			ownBaseAllocator_ = baseAllocator_ = new BaseAllocator();
+		AddChunk(chunk_capacity_);
+	}
+
+	//! Constructor with user-supplied buffer.
+	/*! The user buffer will be used firstly. When it is full, memory pool allocates new chunk with chunk size.
+
+		The user buffer will not be deallocated when this allocator is destructed.
+
+		\param buffer User supplied buffer.
+		\param size Size of the buffer in bytes. It must at least larger than sizeof(ChunkHeader).
+		\param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
+		\param baseAllocator The allocator for allocating memory chunks.
+	*/
+	MemoryPoolAllocator(char *buffer, size_t size, size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) :
+		chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(buffer), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
+	{
+		RAPIDJSON_ASSERT(buffer != 0);
+		RAPIDJSON_ASSERT(size > sizeof(ChunkHeader));
+		chunkHead_ = (ChunkHeader*)buffer;
+		chunkHead_->capacity = size - sizeof(ChunkHeader);
+		chunkHead_->size = 0;
+		chunkHead_->next = 0;
+	}
+
+	//! Destructor.
+	/*! This deallocates all memory chunks, excluding the user-supplied buffer.
+	*/
+	~MemoryPoolAllocator() {
+		Clear();
+		delete ownBaseAllocator_;
+	}
+
+	//! Deallocates all memory chunks, excluding the user-supplied buffer.
+	void Clear() {
+		while(chunkHead_ != 0 && chunkHead_ != (ChunkHeader *)userBuffer_) {
+			ChunkHeader* next = chunkHead_->next;
+			baseAllocator_->Free(chunkHead_);
+			chunkHead_ = next;
+		}
+	}
+
+	//! Computes the total capacity of allocated memory chunks.
+	/*! \return total capacity in bytes.
+	*/
+	size_t Capacity() {
+		size_t capacity = 0;
+		for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
+			capacity += c->capacity;
+		return capacity;
+	}
+
+	//! Computes the memory blocks allocated.
+	/*! \return total used bytes.
+	*/
+	size_t Size() {
+		size_t size = 0;
+		for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
+			size += c->size;
+		return size;
+	}
+
+	//! Allocates a memory block. (concept Allocator)
+	void* Malloc(size_t size) {
+		size = (size + 3) & ~3;	// Force aligning size to 4
+
+		if (chunkHead_->size + size > chunkHead_->capacity)
+			AddChunk(chunk_capacity_ > size ? chunk_capacity_ : size);
+
+		char *buffer = (char *)(chunkHead_ + 1) + chunkHead_->size;
+		RAPIDJSON_ASSERT(((uintptr_t)buffer & 3) == 0);	// returned buffer is aligned to 4
+		chunkHead_->size += size;
+
+		return buffer;
+	}
+
+	//! Resizes a memory block (concept Allocator)
+	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) {
+		if (originalPtr == 0)
+			return Malloc(newSize);
+
+		// Do not shrink if new size is smaller than original
+		if (originalSize >= newSize)
+			return originalPtr;
+
+		// Simply expand it if it is the last allocation and there is sufficient space
+		if (originalPtr == (char *)(chunkHead_ + 1) + chunkHead_->size - originalSize) {
+			size_t increment = newSize - originalSize;
+			increment = (increment + 3) & ~3;	// Force aligning size to 4
+			if (chunkHead_->size + increment <= chunkHead_->capacity) {
+				chunkHead_->size += increment;
+				RAPIDJSON_ASSERT(((uintptr_t)originalPtr & 3) == 0);	// returned buffer is aligned to 4
+				return originalPtr;
+			}
+		}
+
+		// Realloc process: allocate and copy memory, do not free original buffer.
+		void* newBuffer = Malloc(newSize);
+		RAPIDJSON_ASSERT(newBuffer != 0);	// Do not handle out-of-memory explicitly.
+		return memcpy(newBuffer, originalPtr, originalSize);
+	}
+
+	//! Frees a memory block (concept Allocator)
+	static void Free(void *) {} // Do nothing
+
+private:
+	//! Creates a new chunk.
+	/*! \param capacity Capacity of the chunk in bytes.
+	*/
+	void AddChunk(size_t capacity) {
+		ChunkHeader* chunk = (ChunkHeader*)baseAllocator_->Malloc(sizeof(ChunkHeader) + capacity);
+		chunk->capacity = capacity;
+		chunk->size = 0;
+		chunk->next = chunkHead_;
+		chunkHead_ =  chunk;
+	}
+
+	static const int kDefaultChunkCapacity = 64 * 1024; //!< Default chunk capacity.
+
+	//! Chunk header for perpending to each chunk.
+	/*! Chunks are stored as a singly linked list.
+	*/
+	struct ChunkHeader {
+		size_t capacity;	//!< Capacity of the chunk in bytes (excluding the header itself).
+		size_t size;		//!< Current size of allocated memory in bytes.
+		ChunkHeader *next;	//!< Next chunk in the linked list.
+	};
+
+	ChunkHeader *chunkHead_;	//!< Head of the chunk linked-list. Only the head chunk serves allocation.
+	size_t chunk_capacity_;		//!< The minimum capacity of chunk when they are allocated.
+	char *userBuffer_;			//!< User supplied buffer.
+	BaseAllocator* baseAllocator_;	//!< base allocator for allocating memory chunks.
+	BaseAllocator* ownBaseAllocator_;	//!< base allocator created by this object.
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Encoding
+
+/*! \class rapidjson::Encoding
+	\brief Concept for encoding of Unicode characters.
+
+\code
+concept Encoding {
+	typename Ch;	//! Type of character.
+
+	//! \brief Encode a Unicode codepoint to a buffer.
+	//! \param buffer pointer to destination buffer to store the result. It should have sufficient size of encoding one character.
+	//! \param codepoint An unicode codepoint, ranging from 0x0 to 0x10FFFF inclusively.
+	//! \returns the pointer to the next character after the encoded data.
+	static Ch* Encode(Ch *buffer, unsigned codepoint);
+};
+\endcode
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF8
+
+//! UTF-8 encoding.
+/*! http://en.wikipedia.org/wiki/UTF-8
+	\tparam CharType Type for storing 8-bit UTF-8 data. Default is char.
+	\implements Encoding
+*/
+template<typename CharType = char>
+struct UTF8 {
+	typedef CharType Ch;
+
+	static Ch* Encode(Ch *buffer, unsigned codepoint) {
+		if (codepoint <= 0x7F) 
+			*buffer++ = codepoint & 0xFF;
+		else if (codepoint <= 0x7FF) {
+			*buffer++ = 0xC0 | ((codepoint >> 6) & 0xFF);
+			*buffer++ = 0x80 | ((codepoint & 0x3F));
+		}
+		else if (codepoint <= 0xFFFF) {
+			*buffer++ = 0xE0 | ((codepoint >> 12) & 0xFF);
+			*buffer++ = 0x80 | ((codepoint >> 6) & 0x3F);
+			*buffer++ = 0x80 | (codepoint & 0x3F);
+		}
+		else {
+			RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+			*buffer++ = 0xF0 | ((codepoint >> 18) & 0xFF);
+			*buffer++ = 0x80 | ((codepoint >> 12) & 0x3F);
+			*buffer++ = 0x80 | ((codepoint >> 6) & 0x3F);
+			*buffer++ = 0x80 | (codepoint & 0x3F);
+		}
+		return buffer;
+	}
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF16
+
+//! UTF-16 encoding.
+/*! http://en.wikipedia.org/wiki/UTF-16
+	\tparam CharType Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead.
+	\implements Encoding
+*/
+template<typename CharType = wchar_t>
+struct UTF16 {
+	typedef CharType Ch;
+
+	static Ch* Encode(Ch* buffer, unsigned codepoint) {
+		if (codepoint <= 0xFFFF) {
+			RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair 
+			*buffer++ = static_cast<Ch>(codepoint);
+		}
+		else {
+			RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+			unsigned v = codepoint - 0x10000;
+			*buffer++ = static_cast<Ch>((v >> 10) + 0xD800);
+			*buffer++ = (v & 0x3FF) + 0xDC00;
+		}
+		return buffer;
+	}
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF32
+
+//! UTF-32 encoding. 
+/*! http://en.wikipedia.org/wiki/UTF-32
+	\tparam Ch Type for storing 32-bit UTF-32 data. Default is unsigned. C++11 may use char32_t instead.
+	\implements Encoding
+*/
+template<typename CharType = unsigned>
+struct UTF32 {
+	typedef CharType Ch;
+
+	static Ch *Encode(Ch* buffer, unsigned codepoint) {
+		RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+		*buffer++ = codepoint;
+		return buffer;
+	}
+};
+
+///////////////////////////////////////////////////////////////////////////////
+//  Stream
+
+/*! \class rapidjson::Stream
+	\brief Concept for reading and writing characters.
+
+	For read-only stream, no need to implement PutBegin(), Put() and PutEnd().
+
+	For write-only stream, only need to implement Put().
+
+\code
+concept Stream {
+	typename Ch;	//!< Character type of the stream.
+
+	//! Read the current character from stream without moving the read cursor.
+	Ch Peek() const;
+
+	//! Read the current character from stream and moving the read cursor to next character.
+	Ch Take();
+
+	//! Get the current read cursor.
+	//! \return Number of characters read from start.
+	size_t Tell();
+
+	//! Begin writing operation at the current read pointer.
+	//! \return The begin writer pointer.
+	Ch* PutBegin();
+
+	//! Write a character.
+	void Put(Ch c);
+
+	//! End the writing operation.
+	//! \param begin The begin write pointer returned by PutBegin().
+	//! \return Number of characters written.
+	size_t PutEnd(Ch* begin);
+}
+\endcode
+*/
+
+//! Put N copies of a character to a stream.
+template<typename Stream, typename Ch>
+inline void PutN(Stream& stream, Ch c, size_t n) {
+	for (size_t i = 0; i < n; i++)
+		stream.Put(c);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// StringStream
+
+//! Read-only string stream.
+/*! \implements Stream
+*/
+template <typename Encoding>
+struct GenericStringStream {
+	typedef typename Encoding::Ch Ch;
+
+	GenericStringStream(const Ch *src) : src_(src), head_(src) {}
+
+	Ch Peek() const { return *src_; }
+	Ch Take() { return *src_++; }
+	size_t Tell() const { return src_ - head_; }
+
+	Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+	void Put(Ch) { RAPIDJSON_ASSERT(false); }
+	size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+	const Ch* src_;		//!< Current read position.
+	const Ch* head_;	//!< Original head of the string.
+};
+
+typedef GenericStringStream<UTF8<> > StringStream;
+
+///////////////////////////////////////////////////////////////////////////////
+// InsituStringStream
+
+//! A read-write string stream.
+/*! This string stream is particularly designed for in-situ parsing.
+	\implements Stream
+*/
+template <typename Encoding>
+struct GenericInsituStringStream {
+	typedef typename Encoding::Ch Ch;
+
+	GenericInsituStringStream(Ch *src) : src_(src), dst_(0), head_(src) {}
+
+	// Read
+	Ch Peek() { return *src_; }
+	Ch Take() { return *src_++; }
+	size_t Tell() { return src_ - head_; }
+
+	// Write
+	Ch* PutBegin() { return dst_ = src_; }
+	void Put(Ch c) { RAPIDJSON_ASSERT(dst_ != 0); *dst_++ = c; }
+	size_t PutEnd(Ch* begin) { return dst_ - begin; }
+
+	Ch* src_;
+	Ch* dst_;
+	Ch* head_;
+};
+
+typedef GenericInsituStringStream<UTF8<> > InsituStringStream;
+
+///////////////////////////////////////////////////////////////////////////////
+// Type
+
+//! Type of JSON value
+enum Type {
+	kNullType = 0,		//!< null
+	kFalseType = 1,		//!< false
+	kTrueType = 2,		//!< true
+	kObjectType = 3,	//!< object
+	kArrayType = 4,		//!< array 
+	kStringType = 5,	//!< string
+	kNumberType = 6,	//!< number
+};
+
+} // namespace rapidjson
+
+#endif // RAPIDJSON_RAPIDJSON_H_

third-party/rapidjson/reader.h

@@ -0,0 +1,683 @@
+#ifndef RAPIDJSON_READER_H_
+#define RAPIDJSON_READER_H_
+
+// Copyright (c) 2011 Milo Yip (miloyip@gmail.com)
+// Version 0.1
+
+#include "rapidjson.h"
+#include "internal/pow10.h"
+#include "internal/stack.h"
+#include <csetjmp>
+
+#ifdef RAPIDJSON_SSE42
+#include <nmmintrin.h>
+#elif defined(RAPIDJSON_SSE2)
+#include <emmintrin.h>
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4127) // conditional expression is constant
+#endif
+
+#ifndef RAPIDJSON_PARSE_ERROR
+#define RAPIDJSON_PARSE_ERROR(msg, offset) \
+	RAPIDJSON_MULTILINEMACRO_BEGIN \
+	parseError_ = msg; \
+	errorOffset_ = offset; \
+	longjmp(jmpbuf_, 1); \
+	RAPIDJSON_MULTILINEMACRO_END
+#endif
+
+namespace rapidjson {
+
+///////////////////////////////////////////////////////////////////////////////
+// ParseFlag
+
+//! Combination of parseFlags
+enum ParseFlag {
+	kParseDefaultFlags = 0,			//!< Default parse flags. Non-destructive parsing. Text strings are decoded into allocated buffer.
+	kParseInsituFlag = 1			//!< In-situ(destructive) parsing.
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Handler
+
+/*!	\class rapidjson::Handler
+	\brief Concept for receiving events from GenericReader upon parsing.
+\code
+concept Handler {
+	typename Ch;
+
+	void Null();
+	void Bool(bool b);
+	void Int(int i);
+	void Uint(unsigned i);
+	void Int64(int64_t i);
+	void Uint64(uint64_t i);
+	void Double(double d);
+	void String(const Ch* str, SizeType length, bool copy);
+	void StartObject();
+	void EndObject(SizeType memberCount);
+	void StartArray();
+	void EndArray(SizeType elementCount);
+};
+\endcode
+*/
+///////////////////////////////////////////////////////////////////////////////
+// BaseReaderHandler
+
+//! Default implementation of Handler.
+/*! This can be used as base class of any reader handler.
+	\implements Handler
+*/
+template<typename Encoding = UTF8<> >
+struct BaseReaderHandler {
+	typedef typename Encoding::Ch Ch;
+
+	void Default() {}
+	void Null() { Default(); }
+	void Bool(bool) { Default(); }
+	void Int(int) { Default(); }
+	void Uint(unsigned) { Default(); }
+	void Int64(int64_t) { Default(); }
+	void Uint64(uint64_t) { Default(); }
+	void Double(double) { Default(); }
+	void String(const Ch*, SizeType, bool) { Default(); }
+	void StartObject() { Default(); }
+	void EndObject(SizeType) { Default(); }
+	void StartArray() { Default(); }
+	void EndArray(SizeType) { Default(); }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// SkipWhitespace
+
+//! Skip the JSON white spaces in a stream.
+/*! \param stream A input stream for skipping white spaces.
+	\note This function has SSE2/SSE4.2 specialization.
+*/
+template<typename Stream>
+void SkipWhitespace(Stream& stream) {
+	Stream s = stream;	// Use a local copy for optimization
+	while (s.Peek() == ' ' || s.Peek() == '\n' || s.Peek() == '\r' || s.Peek() == '\t')
+		s.Take();
+	stream = s;
+}
+
+#ifdef RAPIDJSON_SSE42
+//! Skip whitespace with SSE 4.2 pcmpistrm instruction, testing 16 8-byte characters at once.
+inline const char *SkipWhitespace_SIMD(const char* p) {
+	static const char whitespace[16] = " \n\r\t";
+	__m128i w = _mm_loadu_si128((const __m128i *)&whitespace[0]);
+
+	for (;;) {
+		__m128i s = _mm_loadu_si128((const __m128i *)p);
+		unsigned r = _mm_cvtsi128_si32(_mm_cmpistrm(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_BIT_MASK | _SIDD_NEGATIVE_POLARITY));
+		if (r == 0)	// all 16 characters are whitespace
+			p += 16;
+		else {		// some of characters may be non-whitespace
+#ifdef _MSC_VER		// Find the index of first non-whitespace
+			unsigned long offset;
+			if (_BitScanForward(&offset, r))
+				return p + offset;
+#else
+			if (r != 0)
+				return p + __builtin_ffs(r) - 1;
+#endif
+		}
+	}
+}
+
+#elif defined(RAPIDJSON_SSE2)
+
+//! Skip whitespace with SSE2 instructions, testing 16 8-byte characters at once.
+inline const char *SkipWhitespace_SIMD(const char* p) {
+	static const char whitespaces[4][17] = {
+		"                ",
+		"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
+		"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r",
+		"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"};
+
+	__m128i w0 = _mm_loadu_si128((const __m128i *)&whitespaces[0][0]);
+	__m128i w1 = _mm_loadu_si128((const __m128i *)&whitespaces[1][0]);
+	__m128i w2 = _mm_loadu_si128((const __m128i *)&whitespaces[2][0]);
+	__m128i w3 = _mm_loadu_si128((const __m128i *)&whitespaces[3][0]);
+
+	for (;;) {
+		__m128i s = _mm_loadu_si128((const __m128i *)p);
+		__m128i x = _mm_cmpeq_epi8(s, w0);
+		x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w1));
+		x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w2));
+		x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w3));
+		unsigned short r = ~_mm_movemask_epi8(x);
+		if (r == 0)	// all 16 characters are whitespace
+			p += 16;
+		else {		// some of characters may be non-whitespace
+#ifdef _MSC_VER		// Find the index of first non-whitespace
+			unsigned long offset;
+			if (_BitScanForward(&offset, r))
+				return p + offset;
+#else
+			if (r != 0)
+				return p + __builtin_ffs(r) - 1;
+#endif
+		}
+	}
+}
+
+#endif // RAPIDJSON_SSE2
+
+#ifdef RAPIDJSON_SIMD
+//! Template function specialization for InsituStringStream
+template<> inline void SkipWhitespace(InsituStringStream& stream) { 
+	stream.src_ = const_cast<char*>(SkipWhitespace_SIMD(stream.src_));
+}
+
+//! Template function specialization for StringStream
+template<> inline void SkipWhitespace(StringStream& stream) {
+	stream.src_ = SkipWhitespace_SIMD(stream.src_);
+}
+#endif // RAPIDJSON_SIMD
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericReader
+
+//! SAX-style JSON parser. Use Reader for UTF8 encoding and default allocator.
+/*! GenericReader parses JSON text from a stream, and send events synchronously to an 
+    object implementing Handler concept.
+
+    It needs to allocate a stack for storing a single decoded string during 
+    non-destructive parsing.
+
+    For in-situ parsing, the decoded string is directly written to the source 
+    text string, no temporary buffer is required.
+
+    A GenericReader object can be reused for parsing multiple JSON text.
+    
+    \tparam Encoding Encoding of both the stream and the parse output.
+    \tparam Allocator Allocator type for stack.
+*/
+template <typename Encoding, typename Allocator = MemoryPoolAllocator<> >
+class GenericReader {
+public:
+	typedef typename Encoding::Ch Ch;
+
+	//! Constructor.
+	/*! \param allocator Optional allocator for allocating stack memory. (Only use for non-destructive parsing)
+		\param stackCapacity stack capacity in bytes for storing a single decoded string.  (Only use for non-destructive parsing)
+	*/
+	GenericReader(Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity) : stack_(allocator, stackCapacity), parseError_(0), errorOffset_(0) {}
+
+	//! Parse JSON text.
+	/*! \tparam parseFlags Combination of ParseFlag. 
+		 \tparam Stream Type of input stream.
+		 \tparam Handler Type of handler which must implement Handler concept.
+		 \param stream Input stream to be parsed.
+		 \param handler The handler to receive events.
+		 \return Whether the parsing is successful.
+	*/
+	template <unsigned parseFlags, typename Stream, typename Handler>
+	bool Parse(Stream& stream, Handler& handler) {
+		parseError_ = 0;
+		errorOffset_ = 0;
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4611) // interaction between '_setjmp' and C++ object destruction is non-portable
+#endif
+		if (setjmp(jmpbuf_)) {
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+			stack_.Clear();
+			return false;
+		}
+
+		SkipWhitespace(stream);
+
+		if (stream.Peek() == '\0')
+			RAPIDJSON_PARSE_ERROR("Text only contains white space(s)", stream.Tell());
+		else {
+			switch (stream.Peek()) {
+				case '{': ParseObject<parseFlags>(stream, handler); break;
+				case '[': ParseArray<parseFlags>(stream, handler); break;
+				default: RAPIDJSON_PARSE_ERROR("Expect either an object or array at root", stream.Tell());
+			}
+			SkipWhitespace(stream);
+
+			if (stream.Peek() != '\0')
+				RAPIDJSON_PARSE_ERROR("Nothing should follow the root object or array.", stream.Tell());
+		}
+
+		return true;
+	}
+
+	bool HasParseError() const { return parseError_ != 0; }
+	const char* GetParseError() const { return parseError_; }
+	size_t GetErrorOffset() const { return errorOffset_; }
+
+private:
+	// Parse object: { string : value, ... }
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseObject(Stream& stream, Handler& handler) {
+		RAPIDJSON_ASSERT(stream.Peek() == '{');
+		stream.Take();	// Skip '{'
+		handler.StartObject();
+		SkipWhitespace(stream);
+
+		if (stream.Peek() == '}') {
+			stream.Take();
+			handler.EndObject(0);	// empty object
+			return;
+		}
+
+		for (SizeType memberCount = 0;;) {
+			if (stream.Peek() != '"') {
+				RAPIDJSON_PARSE_ERROR("Name of an object member must be a string", stream.Tell());
+				break;
+			}
+
+			ParseString<parseFlags>(stream, handler);
+			SkipWhitespace(stream);
+
+			if (stream.Take() != ':') {
+				RAPIDJSON_PARSE_ERROR("There must be a colon after the name of object member", stream.Tell());
+				break;
+			}
+			SkipWhitespace(stream);
+
+			ParseValue<parseFlags>(stream, handler);
+			SkipWhitespace(stream);
+
+			++memberCount;
+
+			switch(stream.Take()) {
+				case ',': SkipWhitespace(stream); break;
+				case '}': handler.EndObject(memberCount); return;
+				default:  RAPIDJSON_PARSE_ERROR("Must be a comma or '}' after an object member", stream.Tell());
+			}
+		}
+	}
+
+	// Parse array: [ value, ... ]
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseArray(Stream& stream, Handler& handler) {
+		RAPIDJSON_ASSERT(stream.Peek() == '[');
+		stream.Take();	// Skip '['
+		handler.StartArray();
+		SkipWhitespace(stream);
+
+		if (stream.Peek() == ']') {
+			stream.Take();
+			handler.EndArray(0); // empty array
+			return;
+		}
+
+		for (SizeType elementCount = 0;;) {
+			ParseValue<parseFlags>(stream, handler);
+			++elementCount;
+			SkipWhitespace(stream);
+
+			switch (stream.Take()) {
+				case ',': SkipWhitespace(stream); break;
+				case ']': handler.EndArray(elementCount); return;
+				default:  RAPIDJSON_PARSE_ERROR("Must be a comma or ']' after an array element.", stream.Tell());
+			}
+		}
+	}
+
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseNull(Stream& stream, Handler& handler) {
+		RAPIDJSON_ASSERT(stream.Peek() == 'n');
+		stream.Take();
+
+		if (stream.Take() == 'u' && stream.Take() == 'l' && stream.Take() == 'l')
+			handler.Null();
+		else
+			RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell() - 1);
+	}
+
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseTrue(Stream& stream, Handler& handler) {
+		RAPIDJSON_ASSERT(stream.Peek() == 't');
+		stream.Take();
+
+		if (stream.Take() == 'r' && stream.Take() == 'u' && stream.Take() == 'e')
+			handler.Bool(true);
+		else
+			RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell());
+	}
+
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseFalse(Stream& stream, Handler& handler) {
+		RAPIDJSON_ASSERT(stream.Peek() == 'f');
+		stream.Take();
+
+		if (stream.Take() == 'a' && stream.Take() == 'l' && stream.Take() == 's' && stream.Take() == 'e')
+			handler.Bool(false);
+		else
+			RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell() - 1);
+	}
+
+	// Helper function to parse four hexidecimal digits in \uXXXX in ParseString().
+	template<typename Stream>
+	unsigned ParseHex4(Stream& stream) {
+		Stream s = stream;	// Use a local copy for optimization
+		unsigned codepoint = 0;
+		for (int i = 0; i < 4; i++) {
+			Ch c = s.Take();
+			codepoint <<= 4;
+			codepoint += c;
+			if (c >= '0' && c <= '9')
+				codepoint -= '0';
+			else if (c >= 'A' && c <= 'F')
+				codepoint -= 'A' - 10;
+			else if (c >= 'a' && c <= 'f')
+				codepoint -= 'a' - 10;
+			else 
+				RAPIDJSON_PARSE_ERROR("Incorrect hex digit after \\u escape", s.Tell() - 1);
+		}
+		stream = s; // Restore stream
+		return codepoint;
+	}
+
+	// Parse string, handling the prefix and suffix double quotes and escaping.
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseString(Stream& stream, Handler& handler) {
+#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+		static const Ch escape[256] = {
+			Z16, Z16, 0, 0,'\"', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'/', 
+			Z16, Z16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0, 
+			0, 0,'\b', 0, 0, 0,'\f', 0, 0, 0, 0, 0, 0, 0,'\n', 0, 
+			0, 0,'\r', 0,'\t', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
+			Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16
+		};
+#undef Z16
+
+		Stream s = stream;	// Use a local copy for optimization
+		RAPIDJSON_ASSERT(s.Peek() == '\"');
+		s.Take();	// Skip '\"'
+		Ch *head;
+		SizeType len;
+		if (parseFlags & kParseInsituFlag)
+			head = s.PutBegin();
+		else
+			len = 0;
+
+#define RAPIDJSON_PUT(x) \
+	do { \
+		if (parseFlags & kParseInsituFlag) \
+			s.Put(x); \
+		else { \
+			*stack_.template Push<Ch>() = x; \
+			++len; \
+		} \
+	} while(false)
+
+		for (;;) {
+			Ch c = s.Take();
+			if (c == '\\') {	// Escape
+				Ch e = s.Take();
+				if ((sizeof(Ch) == 1 || (int)e < 256) && escape[(unsigned char)e])
+					RAPIDJSON_PUT(escape[(unsigned char)e]);
+				else if (e == 'u') {	// Unicode
+					unsigned codepoint = ParseHex4(s);
+					if (codepoint >= 0xD800 && codepoint <= 0xDBFF) { // Handle UTF-16 surrogate pair
+						if (s.Take() != '\\' || s.Take() != 'u') {
+							RAPIDJSON_PARSE_ERROR("Missing the second \\u in surrogate pair", s.Tell() - 2);
+							return;
+						}
+						unsigned codepoint2 = ParseHex4(s);
+						if (codepoint2 < 0xDC00 || codepoint2 > 0xDFFF) {
+							RAPIDJSON_PARSE_ERROR("The second \\u in surrogate pair is invalid", s.Tell() - 2);
+							return;
+						}
+						codepoint = (((codepoint - 0xD800) << 10) | (codepoint2 - 0xDC00)) + 0x10000;
+					}
+
+					Ch buffer[4];
+					SizeType count = SizeType(Encoding::Encode(buffer, codepoint) - &buffer[0]);
+
+					if (parseFlags & kParseInsituFlag) 
+						for (SizeType i = 0; i < count; i++)
+							s.Put(buffer[i]);
+					else {
+						memcpy(stack_.template Push<Ch>(count), buffer, count * sizeof(Ch));
+						len += count;
+					}
+				}
+				else {
+					RAPIDJSON_PARSE_ERROR("Unknown escape character", stream.Tell() - 1);
+					return;
+				}
+			}
+			else if (c == '"') {	// Closing double quote
+				if (parseFlags & kParseInsituFlag) {
+					size_t length = s.PutEnd(head);
+					RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
+					RAPIDJSON_PUT('\0');	// null-terminate the string
+					handler.String(head, SizeType(length), false);
+				}
+				else {
+					RAPIDJSON_PUT('\0');
+					handler.String(stack_.template Pop<Ch>(len), len - 1, true);
+				}
+				stream = s;	// restore stream
+				return;
+			}
+			else if (c == '\0') {
+				RAPIDJSON_PARSE_ERROR("lacks ending quotation before the end of string", stream.Tell() - 1);
+				return;
+			}
+			else if ((unsigned)c < 0x20) {	// RFC 4627: unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
+				RAPIDJSON_PARSE_ERROR("Incorrect unescaped character in string", stream.Tell() - 1);
+				return;
+			}
+			else
+				RAPIDJSON_PUT(c);	// Normal character, just copy
+		}
+#undef RAPIDJSON_PUT
+	}
+
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseNumber(Stream& stream, Handler& handler) {
+		Stream s = stream; // Local copy for optimization
+		// Parse minus
+		bool minus = false;
+		if (s.Peek() == '-') {
+			minus = true;
+			s.Take();
+		}
+
+		// Parse int: zero / ( digit1-9 *DIGIT )
+		unsigned i;
+		bool try64bit = false;
+		if (s.Peek() == '0') {
+			i = 0;
+			s.Take();
+		}
+		else if (s.Peek() >= '1' && s.Peek() <= '9') {
+			i = s.Take() - '0';
+
+			if (minus)
+				while (s.Peek() >= '0' && s.Peek() <= '9') {
+					if (i >= 214748364) { // 2^31 = 2147483648
+						if (i != 214748364 || s.Peek() > '8') {
+							try64bit = true;
+							break;
+						}
+					}
+					i = i * 10 + (s.Take() - '0');
+				}
+			else
+				while (s.Peek() >= '0' && s.Peek() <= '9') {
+					if (i >= 429496729) { // 2^32 - 1 = 4294967295
+						if (i != 429496729 || s.Peek() > '5') {
+							try64bit = true;
+							break;
+						}
+					}
+					i = i * 10 + (s.Take() - '0');
+				}
+		}
+		else {
+			RAPIDJSON_PARSE_ERROR("Expect a value here.", stream.Tell());
+			return;
+		}
+
+		// Parse 64bit int
+		uint64_t i64 = 0;
+		bool useDouble = false;
+		if (try64bit) {
+			i64 = i;
+			if (minus) 
+				while (s.Peek() >= '0' && s.Peek() <= '9') {					
+					if (i64 >= 922337203685477580uLL) // 2^63 = 9223372036854775808
+						if (i64 != 922337203685477580uLL || s.Peek() > '8') {
+							useDouble = true;
+							break;
+						}
+					i64 = i64 * 10 + (s.Take() - '0');
+				}
+			else
+				while (s.Peek() >= '0' && s.Peek() <= '9') {					
+					if (i64 >= 1844674407370955161uLL) // 2^64 - 1 = 18446744073709551615
+						if (i64 != 1844674407370955161uLL || s.Peek() > '5') {
+							useDouble = true;
+							break;
+						}
+					i64 = i64 * 10 + (s.Take() - '0');
+				}
+		}
+
+		// Force double for big integer
+		double d = 0.0;
+		if (useDouble) {
+			d = (double)i64;
+			while (s.Peek() >= '0' && s.Peek() <= '9') {
+				if (d >= 1E307) {
+					RAPIDJSON_PARSE_ERROR("Number too big to store in double", stream.Tell());
+					return;
+				}
+				d = d * 10 + (s.Take() - '0');
+			}
+		}
+
+		// Parse frac = decimal-point 1*DIGIT
+		int expFrac = 0;
+		if (s.Peek() == '.') {
+			if (!useDouble) {
+				d = try64bit ? (double)i64 : (double)i;
+				useDouble = true;
+			}
+			s.Take();
+
+			if (s.Peek() >= '0' && s.Peek() <= '9') {
+				d = d * 10 + (s.Take() - '0');
+				--expFrac;
+			}
+			else {
+				RAPIDJSON_PARSE_ERROR("At least one digit in fraction part", stream.Tell());
+				return;
+			}
+
+			while (s.Peek() >= '0' && s.Peek() <= '9') {
+				if (expFrac > -16) {
+					d = d * 10 + (s.Peek() - '0');
+					--expFrac;
+				}
+				s.Take();
+			}
+		}
+
+		// Parse exp = e [ minus / plus ] 1*DIGIT
+		int exp = 0;
+		if (s.Peek() == 'e' || s.Peek() == 'E') {
+			if (!useDouble) {
+				d = try64bit ? (double)i64 : (double)i;
+				useDouble = true;
+			}
+			s.Take();
+
+			bool expMinus = false;
+			if (s.Peek() == '+')
+				s.Take();
+			else if (s.Peek() == '-') {
+				s.Take();
+				expMinus = true;
+			}
+
+			if (s.Peek() >= '0' && s.Peek() <= '9') {
+				exp = s.Take() - '0';
+				while (s.Peek() >= '0' && s.Peek() <= '9') {
+					exp = exp * 10 + (s.Take() - '0');
+					if (exp > 308) {
+						RAPIDJSON_PARSE_ERROR("Number too big to store in double", stream.Tell());
+						return;
+					}
+				}
+			}
+			else {
+				RAPIDJSON_PARSE_ERROR("At least one digit in exponent", s.Tell());
+				return;
+			}
+
+			if (expMinus)
+				exp = -exp;
+		}
+
+		// Finish parsing, call event according to the type of number.
+		if (useDouble) {
+			d *= internal::Pow10(exp + expFrac);
+			handler.Double(minus ? -d : d);
+		}
+		else {
+			if (try64bit) {
+				if (minus)
+					handler.Int64(-(int64_t)i64);
+				else
+					handler.Uint64(i64);
+			}
+			else {
+				if (minus)
+					handler.Int(-(int)i);
+				else
+					handler.Uint(i);
+			}
+		}
+
+		stream = s; // restore stream
+	}
+
+	// Parse any JSON value
+	template<unsigned parseFlags, typename Stream, typename Handler>
+	void ParseValue(Stream& stream, Handler& handler) {
+		switch (stream.Peek()) {
+			case 'n': ParseNull  <parseFlags>(stream, handler); break;
+			case 't': ParseTrue  <parseFlags>(stream, handler); break;
+			case 'f': ParseFalse <parseFlags>(stream, handler); break;
+			case '"': ParseString<parseFlags>(stream, handler); break;
+			case '{': ParseObject<parseFlags>(stream, handler); break;
+			case '[': ParseArray <parseFlags>(stream, handler); break;
+			default : ParseNumber<parseFlags>(stream, handler);
+		}
+	}
+
+	static const size_t kDefaultStackCapacity = 256;	//!< Default stack capacity in bytes for storing a single decoded string. 
+	internal::Stack<Allocator> stack_;	//!< A stack for storing decoded string temporarily during non-destructive parsing.
+	jmp_buf jmpbuf_;					//!< setjmp buffer for fast exit from nested parsing function calls.
+	const char* parseError_;
+	size_t errorOffset_;
+}; // class GenericReader
+
+//! Reader with UTF8 encoding and default allocator.
+typedef GenericReader<UTF8<> > Reader;
+
+} // namespace rapidjson
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif // RAPIDJSON_READER_H_

third-party/rapidjson/stringbuffer.h

@@ -0,0 +1,49 @@
+#ifndef RAPIDJSON_STRINGBUFFER_H_
+#define RAPIDJSON_STRINGBUFFER_H_
+
+#include "rapidjson.h"
+#include "internal/stack.h"
+
+namespace rapidjson {
+
+//! Represents an in-memory output stream.
+/*!
+	\tparam Encoding Encoding of the stream.
+	\tparam Allocator type for allocating memory buffer.
+	\implements Stream
+*/
+template <typename Encoding, typename Allocator = CrtAllocator>
+struct GenericStringBuffer {
+	typedef typename Encoding::Ch Ch;
+
+	GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
+
+	void Put(Ch c) { *stack_.template Push<Ch>() = c; }
+
+	void Clear() { stack_.Clear(); }
+
+	const char* GetString() const {
+		// Push and pop a null terminator. This is safe.
+		*stack_.template Push<Ch>() = '\0';
+		stack_.template Pop<Ch>(1);
+
+		return stack_.template Bottom<Ch>();
+	}
+
+	size_t Size() const { return stack_.GetSize(); }
+
+	static const size_t kDefaultCapacity = 256;
+	mutable internal::Stack<Allocator> stack_;
+};
+
+typedef GenericStringBuffer<UTF8<> > StringBuffer;
+
+//! Implement specialized version of PutN() with memset() for better performance.
+template<>
+inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
+	memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
+}
+
+} // namespace rapidjson
+
+#endif // RAPIDJSON_STRINGBUFFER_H_

third-party/rapidjson/writer.h

@@ -0,0 +1,241 @@
+#ifndef RAPIDJSON_WRITER_H_
+#define RAPIDJSON_WRITER_H_
+
+#include "rapidjson.h"
+#include "internal/stack.h"
+#include "internal/strfunc.h"
+#include <cstdio>	// snprintf() or _sprintf_s()
+#include <new>		// placement new
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4127) // conditional expression is constant
+#endif
+
+namespace rapidjson {
+
+//! JSON writer
+/*! Writer implements the concept Handler.
+	It generates JSON text by events to an output stream.
+
+	User may programmatically calls the functions of a writer to generate JSON text.
+
+	On the other side, a writer can also be passed to objects that generates events, 
+
+	for example Reader::Parse() and Document::Accept().
+
+	\tparam Stream Type of ouptut stream.
+	\tparam Encoding Encoding of both source strings and output.
+	\implements Handler
+*/
+template<typename Stream, typename Encoding = UTF8<>, typename Allocator = MemoryPoolAllocator<> >
+class Writer {
+public:
+	typedef typename Encoding::Ch Ch;
+
+	Writer(Stream& stream, Allocator* allocator = 0, size_t levelDepth = kDefaultLevelDepth) : 
+		stream_(stream), level_stack_(allocator, levelDepth * sizeof(Level)) {}
+
+	//@name Implementation of Handler
+	//@{
+	Writer& Null()					{ Prefix(kNullType);   WriteNull();			return *this; }
+	Writer& Bool(bool b)			{ Prefix(b ? kTrueType : kFalseType); WriteBool(b); return *this; }
+	Writer& Int(int i)				{ Prefix(kNumberType); WriteInt(i);			return *this; }
+	Writer& Uint(unsigned u)		{ Prefix(kNumberType); WriteUint(u);		return *this; }
+	Writer& Int64(int64_t i64)		{ Prefix(kNumberType); WriteInt64(i64);		return *this; }
+	Writer& Uint64(uint64_t u64)	{ Prefix(kNumberType); WriteUint64(u64);	return *this; }
+	Writer& Double(double d)		{ Prefix(kNumberType); WriteDouble(d);		return *this; }
+
+	Writer& String(const Ch* str, SizeType length, bool copy = false) {
+		(void)copy;
+		Prefix(kStringType);
+		WriteString(str, length);
+		return *this;
+	}
+
+	Writer& StartObject() {
+		Prefix(kObjectType);
+		new (level_stack_.template Push<Level>()) Level(false);
+		WriteStartObject();
+		return *this;
+	}
+
+	Writer& EndObject(SizeType memberCount = 0) {
+		(void)memberCount;
+		RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
+		RAPIDJSON_ASSERT(!level_stack_.template Top<Level>()->inArray);
+		level_stack_.template Pop<Level>(1);
+		WriteEndObject();
+		return *this;
+	}
+
+	Writer& StartArray() {
+		Prefix(kArrayType);
+		new (level_stack_.template Push<Level>()) Level(true);
+		WriteStartArray();
+		return *this;
+	}
+
+	Writer& EndArray(SizeType elementCount = 0) {
+		(void)elementCount;
+		RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
+		RAPIDJSON_ASSERT(level_stack_.template Top<Level>()->inArray);
+		level_stack_.template Pop<Level>(1);
+		WriteEndArray();
+		return *this;
+	}
+	//@}
+
+	//! Simpler but slower overload.
+	Writer& String(const Ch* str) { return String(str, internal::StrLen(str)); }
+
+protected:
+	//! Information for each nested level
+	struct Level {
+		Level(bool inArray_) : inArray(inArray_), valueCount(0) {}
+		bool inArray;		//!< true if in array, otherwise in object
+		size_t valueCount;	//!< number of values in this level
+	};
+
+	static const size_t kDefaultLevelDepth = 32;
+
+	void WriteNull()  {
+		stream_.Put('n'); stream_.Put('u'); stream_.Put('l'); stream_.Put('l');
+	}
+
+	void WriteBool(bool b)  {
+		if (b) {
+			stream_.Put('t'); stream_.Put('r'); stream_.Put('u'); stream_.Put('e');
+		}
+		else {
+			stream_.Put('f'); stream_.Put('a'); stream_.Put('l'); stream_.Put('s'); stream_.Put('e');
+		}
+	}
+
+	void WriteInt(int i) {
+		if (i < 0) {
+			stream_.Put('-');
+			i = -i;
+		}
+		WriteUint((unsigned)i);
+	}
+
+	void WriteUint(unsigned u) {
+		char buffer[10];
+		char *p = buffer;
+		do {
+			*p++ = (u % 10) + '0';
+			u /= 10;
+		} while (u > 0);
+
+		do {
+			--p;
+			stream_.Put(*p);
+		} while (p != buffer);
+	}
+
+	void WriteInt64(int64_t i64) {
+		if (i64 < 0) {
+			stream_.Put('-');
+			i64 = -i64;
+		}
+		WriteUint64((uint64_t)i64);
+	}
+
+	void WriteUint64(uint64_t u64) {
+		char buffer[20];
+		char *p = buffer;
+		do {
+			*p++ = char(u64 % 10) + '0';
+			u64 /= 10;
+		} while (u64 > 0);
+
+		do {
+			--p;
+			stream_.Put(*p);
+		} while (p != buffer);
+	}
+
+	//! \todo Optimization with custom double-to-string converter.
+	void WriteDouble(double d) {
+		char buffer[100];
+#if _MSC_VER
+		int ret = sprintf_s(buffer, sizeof(buffer), "%g", d);
+#else
+		int ret = snprintf(buffer, sizeof(buffer), "%g", d);
+#endif
+		RAPIDJSON_ASSERT(ret >= 1);
+		for (int i = 0; i < ret; i++)
+			stream_.Put(buffer[i]);
+	}
+
+	void WriteString(const Ch* str, SizeType length)  {
+		static const char hexDigits[] = "0123456789ABCDEF";
+		static const char escape[256] = {
+#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+			//0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
+			'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'b', 't', 'n', 'u', 'f', 'r', 'u', 'u', // 00
+			'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', // 10
+			  0,   0, '"',   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0, // 20
+			Z16, Z16,																		// 30~4F
+			  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,'\\',   0,   0,   0, // 50
+			Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16								// 60~FF
+#undef Z16
+		};
+
+		stream_.Put('\"');
+		for (const Ch* p = str; p != str + length; ++p) {
+			if ((sizeof(Ch) == 1 || *p < 256) && escape[(unsigned char)*p])  {
+				stream_.Put('\\');
+				stream_.Put(escape[(unsigned char)*p]);
+				if (escape[(unsigned char)*p] == 'u') {
+					stream_.Put('0');
+					stream_.Put('0');
+					stream_.Put(hexDigits[(*p) >> 4]);
+					stream_.Put(hexDigits[(*p) & 0xF]);
+				}
+			}
+			else
+				stream_.Put(*p);
+		}
+		stream_.Put('\"');
+	}
+
+	void WriteStartObject()	{ stream_.Put('{'); }
+	void WriteEndObject()	{ stream_.Put('}'); }
+	void WriteStartArray()	{ stream_.Put('['); }
+	void WriteEndArray()	{ stream_.Put(']'); }
+
+	void Prefix(Type type) {
+		(void)type;
+		if (level_stack_.GetSize() != 0) { // this value is not at root
+			Level* level = level_stack_.template Top<Level>();
+			if (level->valueCount > 0) {
+				if (level->inArray) 
+					stream_.Put(','); // add comma if it is not the first element in array
+				else  // in object
+					stream_.Put((level->valueCount % 2 == 0) ? ',' : ':');
+			}
+			if (!level->inArray && level->valueCount % 2 == 0)
+				RAPIDJSON_ASSERT(type == kStringType);  // if it's in object, then even number should be a name
+			level->valueCount++;
+		}
+		else
+			RAPIDJSON_ASSERT(type == kObjectType || type == kArrayType);
+	}
+
+	Stream& stream_;
+	internal::Stack<Allocator> level_stack_;
+
+private:
+	// Prohibit assignment for VC C4512 warning
+	Writer& operator=(const Writer& w);
+};
+
+} // namespace rapidjson
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif // RAPIDJSON_RAPIDJSON_H_

utilities/document/document_db.cc

@@ -64,45 +64,43 @@ class Filter {
   static Filter* ParseFilter(const JSONDocument& filter);
 
   struct Interval {
-    JSONDocument upper_bound;
+    const JSONDocument* upper_bound;
-    JSONDocument lower_bound;
+    const JSONDocument* lower_bound;
     bool upper_inclusive;
     bool lower_inclusive;
     Interval()
-        : upper_bound(),
+        : upper_bound(nullptr),
-          lower_bound(),
+          lower_bound(nullptr),
           upper_inclusive(false),
           lower_inclusive(false) {}
-    Interval(const JSONDocument& ub, const JSONDocument& lb, bool ui, bool li)
+    Interval(const JSONDocument* ub, const JSONDocument* lb, bool ui, bool li)
         : upper_bound(ub),
           lower_bound(lb),
           upper_inclusive(ui),
-          lower_inclusive(li) {
+          lower_inclusive(li) {}
-    }
+    void UpdateUpperBound(const JSONDocument* ub, bool inclusive);
-
+    void UpdateLowerBound(const JSONDocument* lb, bool inclusive);
-    void UpdateUpperBound(const JSONDocument& ub, bool inclusive);
-    void UpdateLowerBound(const JSONDocument& lb, bool inclusive);
   };
 
   bool SatisfiesFilter(const JSONDocument& document) const;
   const Interval* GetInterval(const std::string& field) const;
 
  private:
-  explicit Filter(const JSONDocument& filter) : filter_(filter.Copy()) {
+  explicit Filter(const JSONDocument& filter) : filter_(filter) {}
-    assert(filter_.IsOwner());
-  }
 
   // copied from the parameter
   const JSONDocument filter_;
+  // upper_bound and lower_bound point to JSONDocuments in filter_, so no need
+  // to free them
   // constant after construction
   std::unordered_map<std::string, Interval> intervals_;
 };
 
-void Filter::Interval::UpdateUpperBound(const JSONDocument& ub,
+void Filter::Interval::UpdateUpperBound(const JSONDocument* ub,
                                         bool inclusive) {
-  bool update = upper_bound.IsNull();
+  bool update = (upper_bound == nullptr);
   if (!update) {
-    int cmp = DocumentCompare(upper_bound, ub);
+    int cmp = DocumentCompare(*upper_bound, *ub);
     update = (cmp > 0) || (cmp == 0 && !inclusive);
   }
   if (update) {
@@ -111,11 +109,11 @@ void Filter::Interval::UpdateUpperBound(const JSONDocument& ub,
   }
 }
 
-void Filter::Interval::UpdateLowerBound(const JSONDocument& lb,
+void Filter::Interval::UpdateLowerBound(const JSONDocument* lb,
                                         bool inclusive) {
-  bool update = lower_bound.IsNull();
+  bool update = (lower_bound == nullptr);
   if (!update) {
-    int cmp = DocumentCompare(lower_bound, lb);
+    int cmp = DocumentCompare(*lower_bound, *lb);
     update = (cmp < 0) || (cmp == 0 && !inclusive);
   }
   if (update) {
@@ -137,14 +135,14 @@ Filter* Filter::ParseFilter(const JSONDocument& filter) {
       continue;
     }
     assert(f->intervals_.find(items.first) == f->intervals_.end());
-    if (items.second.IsObject()) {
+    if (items.second->IsObject()) {
-      if (items.second.Count() == 0) {
+      if (items.second->Count() == 0) {
         // uhm...?
         return nullptr;
       }
       Interval interval;
-      for (const auto& condition : items.second.Items()) {
+      for (const auto& condition : items.second->Items()) {
-        if (condition.second.IsObject() || condition.second.IsArray()) {
+        if (condition.second->IsObject() || condition.second->IsArray()) {
           // comparison operators not defined on objects. invalid array
           return nullptr;
         }
@@ -166,8 +164,7 @@ Filter* Filter::ParseFilter(const JSONDocument& filter) {
     } else {
       // equality
       f->intervals_.insert(
-          {items.first, Interval(items.second,
+          {items.first, Interval(items.second, items.second, true, true)});
-                                 items.second, true, true)});
     }
   }
 
@@ -185,30 +182,30 @@ const Filter::Interval* Filter::GetInterval(const std::string& field) const {
 
 bool Filter::SatisfiesFilter(const JSONDocument& document) const {
   for (const auto& interval : intervals_) {
-    if (!document.Contains(interval.first)) {
+    auto value = document.Get(interval.first);
+    if (value == nullptr) {
       // doesn't have the value, doesn't satisfy the filter
       // (we don't support null queries yet)
       return false;
     }
-    auto value = document[interval.first];
+    if (interval.second.upper_bound != nullptr) {
-    if (!interval.second.upper_bound.IsNull()) {
+      if (value->type() != interval.second.upper_bound->type()) {
-      if (value.type() != interval.second.upper_bound.type()) {
         // no cross-type queries yet
         // TODO(icanadi) do this at least for numbers!
         return false;
       }
-      int cmp = DocumentCompare(interval.second.upper_bound, value);
+      int cmp = DocumentCompare(*interval.second.upper_bound, *value);
       if (cmp < 0 || (cmp == 0 && interval.second.upper_inclusive == false)) {
         // bigger (or equal) than upper bound
         return false;
       }
     }
-    if (!interval.second.lower_bound.IsNull()) {
+    if (interval.second.lower_bound != nullptr) {
-      if (value.type() != interval.second.lower_bound.type()) {
+      if (value->type() != interval.second.lower_bound->type()) {
         // no cross-type queries yet
         return false;
       }
-      int cmp = DocumentCompare(interval.second.lower_bound, value);
+      int cmp = DocumentCompare(*interval.second.lower_bound, *value);
       if (cmp > 0 || (cmp == 0 && interval.second.lower_inclusive == false)) {
         // smaller (or equal) than the lower bound
         return false;
@@ -389,12 +386,13 @@ class SimpleSortedIndex : public Index {
 
   virtual void GetIndexKey(const JSONDocument& document, std::string* key) const
       override {
-    if (!document.Contains(field_)) {
+    auto value = document.Get(field_);
+    if (value == nullptr) {
       if (!EncodeJSONPrimitive(JSONDocument(JSONDocument::kNull), key)) {
         assert(false);
       }
     } else {
-      if (!EncodeJSONPrimitive(document[field_], key)) {
+      if (!EncodeJSONPrimitive(*value, key)) {
         assert(false);
       }
     }
@@ -413,11 +411,11 @@ class SimpleSortedIndex : public Index {
     Direction direction;
 
     const JSONDocument* limit;
-    if (!interval->lower_bound.IsNull()) {
+    if (interval->lower_bound != nullptr) {
-      limit = &(interval->lower_bound);
+      limit = interval->lower_bound;
       direction = kForwards;
     } else {
-      limit = &(interval->upper_bound);
+      limit = interval->upper_bound;
       direction = kBackwards;
     }
 
@@ -435,13 +433,14 @@ class SimpleSortedIndex : public Index {
                                      Index::Direction direction) const {
     auto interval = filter.GetInterval(field_);
     assert(interval != nullptr);  // because index is useful
+
     if (direction == kForwards) {
-      if (interval->upper_bound.IsNull()) {
+      if (interval->upper_bound == nullptr) {
         // continue looking, no upper bound
         return true;
       }
       std::string encoded_upper_bound;
-      if (!EncodeJSONPrimitive(interval->upper_bound, &encoded_upper_bound)) {
+      if (!EncodeJSONPrimitive(*interval->upper_bound, &encoded_upper_bound)) {
         // uhm...?
         // TODO(icanadi) store encoded upper and lower bounds in Filter*?
         assert(false);
@@ -457,12 +456,12 @@ class SimpleSortedIndex : public Index {
                  : true;
     } else {
       assert(direction == kBackwards);
-      if (interval->lower_bound.IsNull()) {
+      if (interval->lower_bound == nullptr) {
         // continue looking, no lower bound
         return true;
       }
       std::string encoded_lower_bound;
-      if (!EncodeJSONPrimitive(interval->lower_bound, &encoded_lower_bound)) {
+      if (!EncodeJSONPrimitive(*interval->lower_bound, &encoded_lower_bound)) {
         // uhm...?
         // TODO(icanadi) store encoded upper and lower bounds in Filter*?
         assert(false);
@@ -495,7 +494,7 @@ Index* Index::CreateIndexFromDescription(const JSONDocument& description,
     return nullptr;
   }
   const auto& field = *description.Items().begin();
-  if (field.second.IsInt64() == false || field.second.GetInt64() != 1) {
+  if (field.second->IsInt64() == false || field.second->GetInt64() != 1) {
     // not supported yet
     return nullptr;
   }
@@ -585,7 +584,6 @@ class CursorWithFilterIndexed : public Cursor {
     }
     current_json_document_.reset(
         JSONDocument::Deserialize(primary_index_iter_->value()));
-    assert(current_json_document_->IsOwner());
     if (current_json_document_.get() == nullptr) {
       status_ = Status::Corruption("JSON deserialization failed");
       valid_ = false;
@@ -803,19 +801,16 @@ class DocumentDBImpl : public DocumentDB {
     if (!document.IsObject()) {
       return Status::InvalidArgument("Document not an object");
     }
-    if (!document.Contains(kPrimaryKey)) {
+    auto primary_key = document.Get(kPrimaryKey);
-      return Status::InvalidArgument("No primary key");
+    if (primary_key == nullptr || primary_key->IsNull() ||
-    }
+        (!primary_key->IsString() && !primary_key->IsInt64())) {
-    auto primary_key = document[kPrimaryKey];
-    if (primary_key.IsNull() ||
-        (!primary_key.IsString() && !primary_key.IsInt64())) {
       return Status::InvalidArgument(
-          "Primary key format error");
+          "No primary key or primary key format error");
     }
     std::string encoded_document;
     document.Serialize(&encoded_document);
     std::string primary_key_encoded;
-    if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
+    if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
       // previous call should be guaranteed to pass because of all primary_key
       // conditions checked before
       assert(false);
@@ -858,19 +853,16 @@ class DocumentDBImpl : public DocumentDB {
       if (!document.IsObject()) {
         return Status::Corruption("Document corruption");
       }
-      if (!document.Contains(kPrimaryKey)) {
+      auto primary_key = document.Get(kPrimaryKey);
-        return Status::Corruption("Document corruption");
+      if (primary_key == nullptr || primary_key->IsNull() ||
-      }
+          (!primary_key->IsString() && !primary_key->IsInt64())) {
-      auto primary_key = document[kPrimaryKey];
-      if (primary_key.IsNull() ||
-          (!primary_key.IsString() && !primary_key.IsInt64())) {
         return Status::Corruption("Document corruption");
       }
 
       // TODO(icanadi) Instead of doing this, just get primary key encoding from
       // cursor, as it already has this information
       std::string primary_key_encoded;
-      if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
+      if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
         // previous call should be guaranteed to pass because of all primary_key
         // conditions checked before
         assert(false);
@@ -901,9 +893,6 @@ class DocumentDBImpl : public DocumentDB {
     std::unique_ptr<Cursor> cursor(
         ConstructFilterCursor(read_options, nullptr, filter));
 
-    if (!updates.IsObject()) {
-        return Status::Corruption("Bad update document format");
-    }
     WriteBatch batch;
     for (; cursor->status().ok() && cursor->Valid(); cursor->Next()) {
       const auto& old_document = cursor->document();
@@ -914,35 +903,12 @@ class DocumentDBImpl : public DocumentDB {
       // TODO(icanadi) Make this nicer, something like class Filter
       for (const auto& update : updates.Items()) {
         if (update.first == "$set") {
-          JSONDocumentBuilder builder;
+          for (const auto& itr : update.second->Items()) {
-          bool res = builder.WriteStartObject();
-          assert(res);
-          for (const auto& itr : update.second.Items()) {
             if (itr.first == kPrimaryKey) {
               return Status::NotSupported("Please don't change primary key");
             }
-            res = builder.WriteKeyValue(itr.first, itr.second);
+            new_document.Set(itr.first, *itr.second);
-            assert(res);
-          }
-          res = builder.WriteEndObject();
-          assert(res);
-          JSONDocument update_document = builder.GetJSONDocument();
-          builder.Reset();
-          res = builder.WriteStartObject();
-          assert(res);
-          for (const auto& itr : new_document.Items()) {
-            if (update_document.Contains(itr.first)) {
-              res = builder.WriteKeyValue(itr.first,
-                                          update_document[itr.first]);
-            } else {
-              res = builder.WriteKeyValue(itr.first, new_document[itr.first]);
-            }
-            assert(res);
           }
-          res = builder.WriteEndObject();
-          assert(res);
-          new_document = builder.GetJSONDocument();
-          assert(new_document.IsOwner());
         } else {
           // TODO(icanadi) more commands
           return Status::InvalidArgument("Can't understand update command");
@@ -950,12 +916,9 @@ class DocumentDBImpl : public DocumentDB {
       }
 
       // TODO(icanadi) reuse some of this code
-      if (!new_document.Contains(kPrimaryKey)) {
+      auto primary_key = new_document.Get(kPrimaryKey);
-        return Status::Corruption("Corrupted document -- primary key missing");
+      if (primary_key == nullptr || primary_key->IsNull() ||
-      }
+          (!primary_key->IsString() && !primary_key->IsInt64())) {
-      auto primary_key = new_document[kPrimaryKey];
-      if (primary_key.IsNull() ||
-          (!primary_key.IsString() && !primary_key.IsInt64())) {
         // This will happen when document on storage doesn't have primary key,
         // since we don't support any update operations on primary key. That's
         // why this is corruption error
@@ -964,7 +927,7 @@ class DocumentDBImpl : public DocumentDB {
       std::string encoded_document;
       new_document.Serialize(&encoded_document);
       std::string primary_key_encoded;
-      if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
+      if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
         // previous call should be guaranteed to pass because of all primary_key
         // conditions checked before
         assert(false);
@@ -1019,7 +982,7 @@ class DocumentDBImpl : public DocumentDB {
       const auto& command = *command_doc.Items().begin();
 
       if (command.first == "$filter") {
-        cursor = ConstructFilterCursor(read_options, cursor, command.second);
+        cursor = ConstructFilterCursor(read_options, cursor, *command.second);
       } else {
         // only filter is supported for now
         delete cursor;
@@ -1068,12 +1031,12 @@ class DocumentDBImpl : public DocumentDB {
     IndexColumnFamily tmp_storage(nullptr, nullptr);
 
     if (cursor == nullptr) {
+      auto index_name = query.Get("$index");
       IndexColumnFamily* index_column_family = nullptr;
-      if (query.Contains("$index") && query["$index"].IsString()) {
+      if (index_name != nullptr && index_name->IsString()) {
         {
-          auto index_name = query["$index"];
           MutexLock l(&name_to_index_mutex_);
-          auto index_iter = name_to_index_.find(index_name.GetString());
+          auto index_iter = name_to_index_.find(index_name->GetString());
           if (index_iter != name_to_index_.end()) {
             tmp_storage = index_iter->second;
             index_column_family = &tmp_storage;

utilities/document/document_db_test.cc

@@ -67,7 +67,7 @@ class DocumentDBTest {
 TEST(DocumentDBTest, SimpleQueryTest) {
   DocumentDBOptions options;
   DocumentDB::IndexDescriptor index;
-  index.description = Parse("{\"name\": 1}");
+  index.description = Parse("{'name': 1}");
   index.name = "name_index";
 
   ASSERT_OK(DocumentDB::Open(options, dbname_, {}, &db_));
@@ -78,8 +78,8 @@ TEST(DocumentDBTest, SimpleQueryTest) {
   delete index.description;
 
   std::vector<std::string> json_objects = {
-      "{\"_id\': 1, \"name\": \"One\"}",   "{\"_id\": 2, \"name\": \"Two\"}",
+      "{'_id': 1, 'name': 'One'}",   "{'_id': 2, 'name': 'Two'}",
-      "{\"_id\": 3, \"name\": \"Three\"}", "{\"_id\": 4, \"name\": \"Four\"}"};
+      "{'_id': 3, 'name': 'Three'}", "{'_id': 4, 'name': 'Four'}"};
 
   for (auto& json : json_objects) {
     std::unique_ptr<JSONDocument> document(Parse(json));
@@ -255,24 +255,6 @@ TEST(DocumentDBTest, ComplexQueryTest) {
     ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
   }
 
-  // update twice: set priority to 15 where job_name is 'white'
-  {
-    std::unique_ptr<JSONDocument> query(Parse("{'job_name': 'white'}"));
-    std::unique_ptr<JSONDocument> update(Parse("{'$set': {'priority': 10},"
-                                               "'$set': {'priority': 15}}"));
-    ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
-  }
-
-  // update twice: set priority to 15 and
-  // progress to 40 where job_name is 'white'
-  {
-    std::unique_ptr<JSONDocument> query(Parse("{'job_name': 'white'}"));
-    std::unique_ptr<JSONDocument> update(
-        Parse("{'$set': {'priority': 10, 'progress': 35},"
-              "'$set': {'priority': 15, 'progress': 40}}"));
-    ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
-  }
-
   // priority < 0
   {
     std::unique_ptr<JSONDocument> query(

utilities/document/json_document_builder.cc

@@ -1,114 +0,0 @@
-//  Copyright (c) 2013, Facebook, Inc.  All rights reserved.
-//  This source code is licensed under the BSD-style license found in the
-//  LICENSE file in the root directory of this source tree. An additional grant
-//  of patent rights can be found in the PATENTS file in the same directory.
-
-#ifndef ROCKSDB_LITE
-#include "rocksdb/utilities/json_document.h"
-#include "third-party/fbson/FbsonWriter.h"
-
-namespace rocksdb {
-JSONDocumentBuilder::JSONDocumentBuilder()
-: writer_(new fbson::FbsonWriter()) {
-}
-
-JSONDocumentBuilder::JSONDocumentBuilder(fbson::FbsonOutStream* out)
-: writer_(new fbson::FbsonWriter(*out)) {
-}
-
-void JSONDocumentBuilder::Reset() {
-  writer_->reset();
-}
-
-bool JSONDocumentBuilder::WriteStartArray() {
-  return writer_->writeStartArray();
-}
-
-bool JSONDocumentBuilder::WriteEndArray() {
-  return writer_->writeEndArray();
-}
-
-bool JSONDocumentBuilder::WriteStartObject() {
-  return writer_->writeStartObject();
-}
-
-bool JSONDocumentBuilder::WriteEndObject() {
-  return writer_->writeEndObject();
-}
-
-bool JSONDocumentBuilder::WriteKeyValue(const std::string& key,
-                                        const JSONDocument& value) {
-  size_t bytesWritten = writer_->writeKey(key.c_str(), key.size());
-  if (bytesWritten == 0) {
-    return false;
-  }
-  return WriteJSONDocument(value);
-}
-
-bool JSONDocumentBuilder::WriteJSONDocument(const JSONDocument& value) {
-  switch (value.type()) {
-    case JSONDocument::kNull:
-      return writer_->writeNull() != 0;
-    case JSONDocument::kInt64:
-      return writer_->writeInt64(value.GetInt64());
-    case JSONDocument::kDouble:
-      return writer_->writeDouble(value.GetDouble());
-    case JSONDocument::kBool:
-      return writer_->writeBool(value.GetBool());
-    case JSONDocument::kString:
-    {
-      bool res = writer_->writeStartString();
-      if (!res) {
-        return false;
-      }
-      const std::string& str = value.GetString();
-      res = writer_->writeString(str.c_str(), str.size());
-      if (!res) {
-        return false;
-      }
-      return writer_->writeEndString();
-    }
-    case JSONDocument::kArray:
-    {
-      bool res = WriteStartArray();
-      if (!res) {
-        return false;
-      }
-      for (size_t i = 0; i < value.Count(); ++i) {
-        res = WriteJSONDocument(value[i]);
-        if (!res) {
-          return false;
-        }
-      }
-      return WriteEndArray();
-    }
-    case JSONDocument::kObject:
-    {
-      bool res = WriteStartObject();
-      if (!res) {
-        return false;
-      }
-      for (auto keyValue : value.Items()) {
-        WriteKeyValue(keyValue.first, keyValue.second);
-      }
-      return WriteEndObject();
-    }
-    default:
-      assert(false);
-  }
-  return false;
-}
-
-JSONDocument JSONDocumentBuilder::GetJSONDocument() {
-  fbson::FbsonValue* value =
-      fbson::FbsonDocument::createValue(writer_->getOutput()->getBuffer(),
-                                        writer_->getOutput()->getSize());
-  return JSONDocument(value, true);
-}
-
-JSONDocumentBuilder::~JSONDocumentBuilder() {
-}
-
-}  // namespace rocksdb
-
-#endif  // ROCKSDB_LITE

utilities/document/json_document_test.cc

@@ -3,9 +3,7 @@
 //  LICENSE file in the root directory of this source tree. An additional grant
 //  of patent rights can be found in the PATENTS file in the same directory.
 
-#include <map>
 #include <set>
-#include <string>
 
 #include "rocksdb/utilities/json_document.h"
 
@@ -50,10 +48,6 @@ void AssertField(const JSONDocument& json, const std::string& field,
 
 class JSONDocumentTest {
  public:
-  JSONDocumentTest()
-  : rnd_(101)
-  {}
-
   void AssertSampleJSON(const JSONDocument& json) {
     AssertField(json, "title", std::string("json"));
     AssertField(json, "type", std::string("object"));
@@ -100,95 +94,14 @@ class JSONDocumentTest {
       "\"flags\": [10, \"parse\", {\"tag\": \"no\", \"status\": 2}], "
       "\"age\": 110.5e-4, \"depth\": -10 }, \"latlong\": [53.25, 43.75], "
       "\"enabled\": true }";
-
-  Random rnd_;
 };
 
-TEST(JSONDocumentTest, MakeNullTest) {
+TEST(JSONDocumentTest, Parsing) {
-  JSONDocument x;
+  JSONDocument x(static_cast<int64_t>(5));
-  ASSERT_TRUE(x.IsNull());
-  ASSERT_TRUE(x.IsOwner());
-  ASSERT_TRUE(!x.IsBool());
-}
-
-TEST(JSONDocumentTest, MakeBoolTest) {
-  {
-    JSONDocument x(true);
-    ASSERT_TRUE(x.IsOwner());
-    ASSERT_TRUE(x.IsBool());
-    ASSERT_TRUE(!x.IsInt64());
-    ASSERT_EQ(x.GetBool(), true);
-  }
-
-  {
-    JSONDocument x(false);
-    ASSERT_TRUE(x.IsOwner());
-    ASSERT_TRUE(x.IsBool());
-    ASSERT_TRUE(!x.IsInt64());
-    ASSERT_EQ(x.GetBool(), false);
-  }
-}
-
-TEST(JSONDocumentTest, MakeInt64Test) {
-  JSONDocument x(static_cast<int64_t>(16));
-  ASSERT_TRUE(x.IsInt64());
   ASSERT_TRUE(x.IsInt64());
-  ASSERT_TRUE(!x.IsBool());
-  ASSERT_TRUE(x.IsOwner());
-  ASSERT_EQ(x.GetInt64(), 16);
-}
-
-TEST(JSONDocumentTest, MakeStringTest) {
-  JSONDocument x("string");
-  ASSERT_TRUE(x.IsOwner());
-  ASSERT_TRUE(x.IsString());
-  ASSERT_TRUE(!x.IsBool());
-  ASSERT_EQ(x.GetString(), "string");
-}
-
-TEST(JSONDocumentTest, MakeDoubleTest) {
-  JSONDocument x(5.6);
-  ASSERT_TRUE(x.IsOwner());
-  ASSERT_TRUE(x.IsDouble());
-  ASSERT_TRUE(!x.IsBool());
-  ASSERT_EQ(x.GetDouble(), 5.6);
-}
-
-TEST(JSONDocumentTest, MakeByTypeTest) {
-  {
-    JSONDocument x(JSONDocument::kNull);
-    ASSERT_TRUE(x.IsNull());
-  }
-  {
-    JSONDocument x(JSONDocument::kBool);
-    ASSERT_TRUE(x.IsBool());
-  }
-  {
-    JSONDocument x(JSONDocument::kString);
-    ASSERT_TRUE(x.IsString());
-  }
-  {
-    JSONDocument x(JSONDocument::kInt64);
-    ASSERT_TRUE(x.IsInt64());
-  }
-  {
-    JSONDocument x(JSONDocument::kDouble);
-    ASSERT_TRUE(x.IsDouble());
-  }
-  {
-    JSONDocument x(JSONDocument::kObject);
-    ASSERT_TRUE(x.IsObject());
-  }
-  {
-    JSONDocument x(JSONDocument::kArray);
-    ASSERT_TRUE(x.IsArray());
-  }
-}
 
-TEST(JSONDocumentTest, Parsing) {
+  // make sure it's correctly parsed
-  std::unique_ptr<JSONDocument> parsed_json(
+  auto parsed_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
-          JSONDocument::ParseJSON(kSampleJSON.c_str()));
-  ASSERT_TRUE(parsed_json->IsOwner());
   ASSERT_TRUE(parsed_json != nullptr);
   AssertSampleJSON(*parsed_json);
 
@@ -196,11 +109,13 @@ TEST(JSONDocumentTest, Parsing) {
   JSONDocument copied_json_document(*parsed_json);
   AssertSampleJSON(copied_json_document);
   ASSERT_TRUE(copied_json_document == *parsed_json);
+  delete parsed_json;
 
-  std::unique_ptr<JSONDocument> parsed_different_sample(
+  auto parsed_different_sample =
-      JSONDocument::ParseJSON(kSampleJSONDifferent.c_str()));
+      JSONDocument::ParseJSON(kSampleJSONDifferent.c_str());
   ASSERT_TRUE(parsed_different_sample != nullptr);
   ASSERT_TRUE(!(*parsed_different_sample == copied_json_document));
+  delete parsed_different_sample;
 
   // parse error
   const std::string kFaultyJSON =
@@ -209,116 +124,45 @@ TEST(JSONDocumentTest, Parsing) {
 }
 
 TEST(JSONDocumentTest, Serialization) {
-  std::unique_ptr<JSONDocument> parsed_json(
+  auto parsed_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
-            JSONDocument::ParseJSON(kSampleJSON.c_str()));
   ASSERT_TRUE(parsed_json != nullptr);
-  ASSERT_TRUE(parsed_json->IsOwner());
   std::string serialized;
   parsed_json->Serialize(&serialized);
+  delete parsed_json;
 
-  std::unique_ptr<JSONDocument> deserialized_json(
+  auto deserialized_json = JSONDocument::Deserialize(Slice(serialized));
-            JSONDocument::Deserialize(Slice(serialized)));
   ASSERT_TRUE(deserialized_json != nullptr);
   AssertSampleJSON(*deserialized_json);
+  delete deserialized_json;
 
   // deserialization failure
   ASSERT_TRUE(JSONDocument::Deserialize(
                   Slice(serialized.data(), serialized.size() - 10)) == nullptr);
 }
 
-TEST(JSONDocumentTest, OperatorEqualsTest) {
+TEST(JSONDocumentTest, Mutation) {
-  // kNull
+  auto sample_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
-  ASSERT_TRUE(JSONDocument() == JSONDocument());
+  ASSERT_TRUE(sample_json != nullptr);
-
+  auto different_json = JSONDocument::ParseJSON(kSampleJSONDifferent.c_str());
-  // kBool
+  ASSERT_TRUE(different_json != nullptr);
-  ASSERT_TRUE(JSONDocument(false) != JSONDocument());
-  ASSERT_TRUE(JSONDocument(false) == JSONDocument(false));
-  ASSERT_TRUE(JSONDocument(true) == JSONDocument(true));
-  ASSERT_TRUE(JSONDocument(false) != JSONDocument(true));
-
-  // kString
-  ASSERT_TRUE(JSONDocument("test") != JSONDocument());
-  ASSERT_TRUE(JSONDocument("test") == JSONDocument("test"));
-
-  // kInt64
-  ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) != JSONDocument());
-  ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) !=
-              JSONDocument(static_cast<int64_t>(14)));
-  ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) ==
-              JSONDocument(static_cast<int64_t>(15)));
-
-  unique_ptr<JSONDocument> arrayWithInt8Doc(JSONDocument::ParseJSON("[8]"));
-  ASSERT_TRUE(arrayWithInt8Doc != nullptr);
-  ASSERT_TRUE(arrayWithInt8Doc->IsArray());
-  ASSERT_TRUE((*arrayWithInt8Doc)[0].IsInt64());
-  ASSERT_TRUE((*arrayWithInt8Doc)[0] == JSONDocument(static_cast<int64_t>(8)));
-
-  unique_ptr<JSONDocument> arrayWithInt16Doc(JSONDocument::ParseJSON("[512]"));
-  ASSERT_TRUE(arrayWithInt16Doc != nullptr);
-  ASSERT_TRUE(arrayWithInt16Doc->IsArray());
-  ASSERT_TRUE((*arrayWithInt16Doc)[0].IsInt64());
-  ASSERT_TRUE((*arrayWithInt16Doc)[0] ==
-              JSONDocument(static_cast<int64_t>(512)));
-
-  unique_ptr<JSONDocument> arrayWithInt32Doc(
-    JSONDocument::ParseJSON("[1000000]"));
-  ASSERT_TRUE(arrayWithInt32Doc != nullptr);
-  ASSERT_TRUE(arrayWithInt32Doc->IsArray());
-  ASSERT_TRUE((*arrayWithInt32Doc)[0].IsInt64());
-  ASSERT_TRUE((*arrayWithInt32Doc)[0] ==
-               JSONDocument(static_cast<int64_t>(1000000)));
-
-  // kDouble
-  ASSERT_TRUE(JSONDocument(15.) != JSONDocument());
-  ASSERT_TRUE(JSONDocument(15.) != JSONDocument(14.));
-  ASSERT_TRUE(JSONDocument(15.) == JSONDocument(15.));
-}
-
-TEST(JSONDocumentTest, JSONDocumentBuilderTest) {
-  unique_ptr<JSONDocument> parsedArray(
-    JSONDocument::ParseJSON("[1, [123, \"a\", \"b\"], {\"b\":\"c\"}]"));
-  ASSERT_TRUE(parsedArray != nullptr);
 
-  JSONDocumentBuilder builder;
+  (*different_json)["properties"]["flags"][2].Set("status", JSONDocument());
-  ASSERT_TRUE(builder.WriteStartArray());
-  ASSERT_TRUE(builder.WriteJSONDocument(1));
-
-  ASSERT_TRUE(builder.WriteStartArray());
-    ASSERT_TRUE(builder.WriteJSONDocument(123));
-    ASSERT_TRUE(builder.WriteJSONDocument("a"));
-    ASSERT_TRUE(builder.WriteJSONDocument("b"));
-  ASSERT_TRUE(builder.WriteEndArray());
-
-  ASSERT_TRUE(builder.WriteStartObject());
-    ASSERT_TRUE(builder.WriteKeyValue("b", "c"));
-  ASSERT_TRUE(builder.WriteEndObject());
-
-  ASSERT_TRUE(builder.WriteEndArray());
-
-  ASSERT_TRUE(*parsedArray == builder.GetJSONDocument());
-}
 
-TEST(JSONDocumentTest, OwnershipTest) {
+  ASSERT_TRUE(*different_json == *sample_json);
-  std::unique_ptr<JSONDocument> parsed(
-          JSONDocument::ParseJSON(kSampleJSON.c_str()));
-  ASSERT_TRUE(parsed != nullptr);
-  ASSERT_TRUE(parsed->IsOwner());
 
-  // Copy constructor from owner -> owner
+  delete different_json;
-  JSONDocument copy_constructor(*parsed);
+  delete sample_json;
-  ASSERT_TRUE(copy_constructor.IsOwner());
 
-  // Copy constructor from non-owner -> non-owner
+  auto json1 = JSONDocument::ParseJSON("{\"a\": [1, 2, 3]}");
-  JSONDocument non_owner((*parsed)["properties"]);
+  auto json2 = JSONDocument::ParseJSON("{\"a\": [2, 2, 3, 4]}");
-  ASSERT_TRUE(!non_owner.IsOwner());
+  ASSERT_TRUE(json1 != nullptr && json2 != nullptr);
 
-  // Move constructor from owner -> owner
+  (*json1)["a"].SetInArray(0, static_cast<int64_t>(2))->PushBack(
-  JSONDocument moved_from_owner(std::move(copy_constructor));
+      static_cast<int64_t>(4));
-  ASSERT_TRUE(moved_from_owner.IsOwner());
+  ASSERT_TRUE(*json1 == *json2);
 
-  // Move constructor from non-owner -> non-owner
+  delete json1;
-  JSONDocument moved_from_non_owner(std::move(non_owner));
+  delete json2;
-  ASSERT_TRUE(!moved_from_non_owner.IsOwner());
 }
 
 }  //  namespace rocksdb