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c binding: add msgpack_sbuffer

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git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@98 5a5092ae-2292-43ba-b2d5-dcab9c1a2731
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frsyuki 2009-02-15 09:10:01 +00:00
parent 79c02cb218
commit e3f889c958
1 changed files with 68 additions and 0 deletions
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c/sbuffer.h Normal file
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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_H__
#define MSGPACK_SBUFFER_H__
#include <stdlib.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
char* ptr;
size_t size;
size_t capacity;
} msgpack_sbuffer;
static inline void msgpack_sbuffer_init(msgpack_sbuffer* sbuf)
{
memset(sbuf, 0, sizeof(msgpack_sbuffer));
}
static inline void msgpack_sbuffer_destroy(msgpack_sbuffer* sbuf)
{
free(sbuf->ptr);
}
static inline int msgpack_sbuffer_write(void* data, const char* buf, unsigned int len)
{
msgpack_sbuffer* sbuf = (msgpack_sbuffer*)data;
if(sbuf->capacity - sbuf->size < len) {
size_t nsize = (sbuf->capacity ? sbuf->capacity*2 : 2048);
while(nsize < sbuf->size + len) { nsize *= 2; }
void* tmp = realloc(sbuf->ptr, nsize);
if(!tmp) { return -1; }
sbuf->ptr = (char*)tmp;
sbuf->capacity = nsize;
}
memcpy(sbuf->ptr + sbuf->size, buf, len);
sbuf->size += len;
return 0;
}
#ifdef __cplusplus
}
#endif
#endif /* msgpack/sbuffer.h */