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//
// MessagePack for C++ simple buffer implementation
//
// Copyright (C) 2008-2009 FURUHASHI Sadayuki
//
// Licensed 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 MSGPACK_SBUFFER_HPP__
#define MSGPACK_SBUFFER_HPP__
#include <string.h>
#include <stdlib.h>
#include <stdexcept>
namespace msgpack {
class sbuffer {
public:
sbuffer() : m_capacity(0), m_size(0), m_ptr(NULL) { }
~sbuffer()
{
free(m_ptr);
}
public:
void write(const char* buf, size_t len)
{
if(m_capacity - m_size < len) {
size_t nsize = (m_capacity ? m_capacity*2 : 2048);
while(nsize < m_size + len) { nsize *= 2; }
char* tmp = (char*)realloc(m_ptr, nsize);
if(!tmp) { throw std::bad_alloc(); }
m_ptr = tmp;
m_capacity = nsize;
}
memcpy(m_ptr + m_size, buf, len);
m_size += len;
}
char* data()
{
return m_ptr;
}
size_t size() const
{
return m_size;
}
char* release()
{
char* tmp = m_ptr;
m_capacity = 0;
m_size = 0;
m_ptr = NULL;
return tmp;
}
private:
size_t m_capacity;
size_t m_size;
char* m_ptr;
private:
sbuffer(const sbuffer&);
};
} // namespace msgpack
#endif /* msgpack/sbuffer.hpp */
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