mirror of https://github.com/Icinga/icinga2.git
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2007-2014, Lloyd Hilaiel <me@lloyd.io>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "yajl_buf.h"
|
|
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define YAJL_BUF_INIT_SIZE 2048
|
|
|
|
struct yajl_buf_t {
|
|
size_t len;
|
|
size_t used;
|
|
unsigned char * data;
|
|
yajl_alloc_funcs * alloc;
|
|
};
|
|
|
|
static
|
|
void yajl_buf_ensure_available(yajl_buf buf, size_t want)
|
|
{
|
|
size_t need;
|
|
|
|
assert(buf != NULL);
|
|
|
|
/* first call */
|
|
if (buf->data == NULL) {
|
|
buf->len = YAJL_BUF_INIT_SIZE;
|
|
buf->data = (unsigned char *) YA_MALLOC(buf->alloc, buf->len);
|
|
buf->data[0] = 0;
|
|
}
|
|
|
|
need = buf->len;
|
|
|
|
while (want >= (need - buf->used)) need <<= 1;
|
|
|
|
if (need != buf->len) {
|
|
buf->data = (unsigned char *) YA_REALLOC(buf->alloc, buf->data, need);
|
|
buf->len = need;
|
|
}
|
|
}
|
|
|
|
yajl_buf yajl_buf_alloc(yajl_alloc_funcs * alloc)
|
|
{
|
|
yajl_buf b = YA_MALLOC(alloc, sizeof(struct yajl_buf_t));
|
|
memset((void *) b, 0, sizeof(struct yajl_buf_t));
|
|
b->alloc = alloc;
|
|
return b;
|
|
}
|
|
|
|
void yajl_buf_free(yajl_buf buf)
|
|
{
|
|
assert(buf != NULL);
|
|
if (buf->data) YA_FREE(buf->alloc, buf->data);
|
|
YA_FREE(buf->alloc, buf);
|
|
}
|
|
|
|
void yajl_buf_append(yajl_buf buf, const void * data, size_t len)
|
|
{
|
|
yajl_buf_ensure_available(buf, len);
|
|
if (len > 0) {
|
|
assert(data != NULL);
|
|
memcpy(buf->data + buf->used, data, len);
|
|
buf->used += len;
|
|
buf->data[buf->used] = 0;
|
|
}
|
|
}
|
|
|
|
void yajl_buf_clear(yajl_buf buf)
|
|
{
|
|
buf->used = 0;
|
|
if (buf->data) buf->data[buf->used] = 0;
|
|
}
|
|
|
|
const unsigned char * yajl_buf_data(yajl_buf buf)
|
|
{
|
|
return buf->data;
|
|
}
|
|
|
|
size_t yajl_buf_len(yajl_buf buf)
|
|
{
|
|
return buf->used;
|
|
}
|
|
|
|
void
|
|
yajl_buf_truncate(yajl_buf buf, size_t len)
|
|
{
|
|
assert(len <= buf->used);
|
|
buf->used = len;
|
|
}
|