mirror of
https://github.com/msgpack/msgpack-c.git
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86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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* MessagePack for C simple buffer implementation
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*
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* Copyright (C) 2008-2009 FURUHASHI Sadayuki
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MSGPACK_SBUFFER_H__
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#define MSGPACK_SBUFFER_H__
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#include <stdlib.h>
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#include <string.h>
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#ifndef MSGPACK_SBUFFER_INIT_SIZE
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#define MSGPACK_SBUFFER_INIT_SIZE 2048
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct msgpack_sbuffer {
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size_t size;
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char* data;
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size_t alloc;
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} msgpack_sbuffer;
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static inline void msgpack_sbuffer_init(msgpack_sbuffer* sbuf)
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{
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memset(sbuf, 0, sizeof(msgpack_sbuffer));
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}
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static inline void msgpack_sbuffer_destroy(msgpack_sbuffer* sbuf)
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{
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free(sbuf->data);
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}
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static inline int msgpack_sbuffer_write(void* data, const char* buf, unsigned int len)
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{
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msgpack_sbuffer* sbuf = (msgpack_sbuffer*)data;
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if(sbuf->alloc - sbuf->size < len) {
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size_t nsize = (sbuf->alloc) ?
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sbuf->alloc * 2 : MSGPACK_SBUFFER_INIT_SIZE;
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while(nsize < sbuf->size + len) { nsize *= 2; }
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void* tmp = realloc(sbuf->data, nsize);
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if(!tmp) { return -1; }
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sbuf->data = (char*)tmp;
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sbuf->alloc = nsize;
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}
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memcpy(sbuf->data + sbuf->size, buf, len);
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sbuf->size += len;
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return 0;
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}
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static inline char* msgpack_sbuffer_release(msgpack_sbuffer* sbuf)
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{
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char* tmp = sbuf->data;
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sbuf->size = 0;
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sbuf->data = NULL;
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sbuf->alloc = 0;
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return tmp;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* msgpack/sbuffer.h */
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