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rocksdb/thrift/lib/cpp/util/VarintUtils.h

64 lines
2.1 KiB

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#ifndef THRIFT_UTIL_VARINTUTILS_H_
#define THRIFT_UTIL_VARINTUTILS_H_ 1
#include <stdint.h>
namespace apache { namespace thrift {
namespace util {
/**
* Read an i16 from the wire as a varint. The MSB of each byte is set
* if there is another byte to follow. This can read up to 3 bytes.
*/
uint32_t readVarint16(uint8_t const* ptr, int16_t* i16,
uint8_t const* boundary);
/**
* Read an i32 from the wire as a varint. The MSB of each byte is set
* if there is another byte to follow. This can read up to 5 bytes.
*/
uint32_t readVarint32(uint8_t const* ptr, int32_t* i32,
uint8_t const* boundary);
/**
* Read an i64 from the wire as a proper varint. The MSB of each byte is set
* if there is another byte to follow. This can read up to 10 bytes.
* Caller is responsible for advancing ptr after call.
*/
uint32_t readVarint64(uint8_t const* ptr, int64_t* i64,
uint8_t const* boundary);
/**
* Write an i32 as a varint. Results in 1-5 bytes on the wire.
*/
uint32_t writeVarint32(uint32_t n, uint8_t* pkt);
/**
* Write an i16 as a varint. Results in 1-3 bytes on the wire.
*/
uint32_t writeVarint16(uint16_t n, uint8_t* pkt);
}}} // apache::thrift::util
#include "VarintUtils.tcc"
#endif // THRIFT_UTIL_VARINTUTILS_H_