96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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/*
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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_buf.h"
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#include "nghttp2_helper.h"
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void nghttp2_buf_init(nghttp2_buf *buf)
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{
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buf->begin = NULL;
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buf->end = NULL;
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buf->pos = NULL;
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buf->last = NULL;
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buf->mark = NULL;
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}
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int nghttp2_buf_init2(nghttp2_buf *buf, size_t initial)
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{
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nghttp2_buf_init(buf);
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return nghttp2_buf_reserve(buf, initial);
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}
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void nghttp2_buf_free(nghttp2_buf *buf)
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{
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free(buf->begin);
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}
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int nghttp2_buf_reserve(nghttp2_buf *buf, size_t new_cap)
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{
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uint8_t *ptr;
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size_t cap;
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cap = nghttp2_buf_cap(buf);
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if(cap >= new_cap) {
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return 0;
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}
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new_cap = nghttp2_max(new_cap, cap * 2);
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ptr = realloc(buf->begin, new_cap);
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if(ptr == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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buf->pos = ptr + (buf->pos - buf->begin);
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buf->last = ptr + (buf->last - buf->begin);
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buf->mark = ptr + (buf->mark - buf->begin);
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buf->begin = ptr;
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buf->end = ptr + new_cap;
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return 0;
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}
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int nghttp2_buf_pos_reserve(nghttp2_buf *buf, size_t new_rel_cap)
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{
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return nghttp2_buf_reserve(buf, nghttp2_buf_pos_offset(buf) + new_rel_cap);
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}
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int nghttp2_buf_last_reserve(nghttp2_buf *buf, size_t new_rel_cap)
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{
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return nghttp2_buf_reserve(buf, nghttp2_buf_last_offset(buf) + new_rel_cap);
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}
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void nghttp2_buf_reset(nghttp2_buf *buf)
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{
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buf->pos = buf->last = buf->mark = buf->begin;
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}
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void nghttp2_buf_wrap_init(nghttp2_buf *buf, uint8_t *begin, size_t len)
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{
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buf->begin = buf->pos = buf->last = buf->mark = begin;
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buf->end = begin + len;
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}
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