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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
/**
* @defgroup msgpack_sbuffer Simple buffer
* @ingroup msgpack_buffer
* @{
*/
typedef struct msgpack_sbuffer {
size_t size;
char* data;
size_t alloc;
} 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->data);
}
static inline msgpack_sbuffer* msgpack_sbuffer_new(void)
{
return (msgpack_sbuffer*)calloc(1, sizeof(msgpack_sbuffer));
}
static inline void msgpack_sbuffer_free(msgpack_sbuffer* sbuf)
{
if(sbuf == NULL) { return; }
msgpack_sbuffer_destroy(sbuf);
free(sbuf);
}
#ifndef MSGPACK_SBUFFER_INIT_SIZE
#define MSGPACK_SBUFFER_INIT_SIZE 8192
#endif
static inline int msgpack_sbuffer_write(void* data, const char* buf, size_t len)
{
msgpack_sbuffer* sbuf = (msgpack_sbuffer*)data;
if(sbuf->alloc - sbuf->size < len) {
void* tmp;
size_t nsize = (sbuf->alloc) ?
sbuf->alloc * 2 : MSGPACK_SBUFFER_INIT_SIZE;
while(nsize < sbuf->size + len) {
size_t tmp_nsize = nsize * 2;
if (tmp_nsize <= nsize) {
nsize = sbuf->size + len;
break;
}
nsize = tmp_nsize;
}
tmp = realloc(sbuf->data, nsize);
if(!tmp) { return -1; }
sbuf->data = (char*)tmp;
sbuf->alloc = nsize;
}
memcpy(sbuf->data + sbuf->size, buf, len);
sbuf->size += len;
return 0;
}
static inline char* msgpack_sbuffer_release(msgpack_sbuffer* sbuf)
{
char* tmp = sbuf->data;
sbuf->size = 0;
sbuf->data = NULL;
sbuf->alloc = 0;
return tmp;
}
static inline void msgpack_sbuffer_clear(msgpack_sbuffer* sbuf)
{
sbuf->size = 0;
}
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* msgpack/sbuffer.h */
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