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/*
* nghttp3
*
* Copyright (c) 2019 nghttp3 contributors
* Copyright (c) 2017 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "nghttp3_buf.h"
void nghttp3_buf_init(nghttp3_buf *buf) {
buf->begin = buf->end = buf->pos = buf->last = NULL;
}
void nghttp3_buf_wrap_init(nghttp3_buf *buf, uint8_t *src, size_t len) {
buf->begin = buf->pos = buf->last = src;
buf->end = buf->begin + len;
}
void nghttp3_buf_free(nghttp3_buf *buf, const nghttp3_mem *mem) {
nghttp3_mem_free(mem, buf->begin);
}
size_t nghttp3_buf_left(const nghttp3_buf *buf) {
return (size_t)(buf->end - buf->last);
}
size_t nghttp3_buf_len(const nghttp3_buf *buf) {
return (size_t)(buf->last - buf->pos);
}
size_t nghttp3_buf_cap(const nghttp3_buf *buf) {
return (size_t)(buf->end - buf->begin);
}
void nghttp3_buf_reset(nghttp3_buf *buf) { buf->pos = buf->last = buf->begin; }
int nghttp3_buf_reserve(nghttp3_buf *buf, size_t size, const nghttp3_mem *mem) {
uint8_t *p;
nghttp3_ssize pos_offset, last_offset;
if ((size_t)(buf->end - buf->begin) >= size) {
return 0;
}
pos_offset = buf->pos - buf->begin;
last_offset = buf->last - buf->begin;
p = nghttp3_mem_realloc(mem, buf->begin, size);
if (p == NULL) {
return NGHTTP3_ERR_NOMEM;
}
buf->begin = p;
buf->end = p + size;
buf->pos = p + pos_offset;
buf->last = p + last_offset;
return 0;
}
void nghttp3_buf_swap(nghttp3_buf *a, nghttp3_buf *b) {
nghttp3_buf c = *a;
*a = *b;
*b = c;
}
void nghttp3_typed_buf_init(nghttp3_typed_buf *tbuf, const nghttp3_buf *buf,
nghttp3_buf_type type) {
tbuf->buf = *buf;
tbuf->type = type;
}
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