95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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* nghttp2 - HTTP/2.0 C Library
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*
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* Copyright (c) 2014 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nghttp2_buffer.h"
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#include <assert.h>
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#include <string.h>
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#include "nghttp2_helper.h"
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void nghttp2_buffer_init(nghttp2_buffer *buffer, size_t max_capacity)
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{
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buffer->buf = NULL;
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buffer->len = 0;
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buffer->capacity = 0;
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buffer->max_capacity = max_capacity;
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}
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void nghttp2_buffer_free(nghttp2_buffer *buffer)
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{
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free(buffer->buf);
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}
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int nghttp2_buffer_reserve(nghttp2_buffer *buffer, size_t len)
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{
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if(len > buffer->max_capacity) {
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return NGHTTP2_ERR_BUFFER_ERROR;
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}
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if(buffer->capacity < len) {
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uint8_t *new_buf;
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size_t new_cap = buffer->capacity == 0 ? 8 : buffer->capacity * 3 / 2;
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new_cap = nghttp2_min(buffer->max_capacity, nghttp2_max(new_cap, len));
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new_buf = realloc(buffer->buf, new_cap);
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if(new_buf == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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buffer->buf = new_buf;
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buffer->capacity = new_cap;
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}
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return 0;
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}
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int nghttp2_buffer_add(nghttp2_buffer *buffer,
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const uint8_t *data, size_t len)
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{
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int rv;
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rv = nghttp2_buffer_reserve(buffer, buffer->len + len);
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if(rv != 0) {
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return rv;
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}
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memcpy(buffer->buf + buffer->len, data, len);
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buffer->len += len;
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return 0;
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}
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int nghttp2_buffer_add_byte(nghttp2_buffer *buffer, uint8_t b)
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{
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int rv;
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rv = nghttp2_buffer_reserve(buffer, buffer->len + 1);
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if(rv != 0) {
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return rv;
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}
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buffer->buf[buffer->len] = b;
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++buffer->len;
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return 0;
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}
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void nghttp2_buffer_release(nghttp2_buffer *buffer)
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{
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buffer->buf = NULL;
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buffer->len = 0;
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buffer->capacity = 0;
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}
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