Add rapidjson to RocksDB

Summary:
This diff adds rapidjson (https://code.google.com/p/rapidjson/) to RocksDB repository. First step to adding JSON is to add a JSON parser :)

I'm not sure if rapidjson is the right choice. I only considered folly as an alternative. Using folly JSON parser has serious downsides. I tried extracting folly::json from the folly library. However, it depends on folly::dynamic, which basically depends on everything else. I would prefer to avoid adding complete folly library as RocksDB dependency. Folly has a lot of its own dependencies (https://github.com/facebook/folly) and also looks like open source world has some trouble installing it (https://groups.google.com/forum/#!forum/facebook-folly -- 60% of the posts are compile errors). We can discuss this if you think otherwise.

RapidJSON does not have any dependencies whatsoever. No boost, no STL. We don't need to compile it since it's all header files. The performance results are also impressive: https://code.google.com/p/rapidjson/wiki/Performance. However, I'll make sure to write code in a way that we can easily switch JSON implementations going forward. Quora thread has some alternatives: http://www.quora.com/What-is-the-best-C-JSON-library

Test Plan: none

Reviewers: dhruba, haobo, yhchiang, sdong, jamesgpearce

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18729

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 || 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_