mirror of https://github.com/nodejs/node.git
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* nghttp3
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*
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* Copyright (c) 2019 nghttp3 contributors
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* Copyright (c) 2017 ngtcp2 contributors
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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 "nghttp3_buf.h"
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void nghttp3_buf_init(nghttp3_buf *buf) {
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buf->begin = buf->end = buf->pos = buf->last = NULL;
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}
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void nghttp3_buf_wrap_init(nghttp3_buf *buf, uint8_t *src, size_t len) {
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buf->begin = buf->pos = buf->last = src;
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buf->end = buf->begin + len;
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}
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void nghttp3_buf_free(nghttp3_buf *buf, const nghttp3_mem *mem) {
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nghttp3_mem_free(mem, buf->begin);
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}
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size_t nghttp3_buf_left(const nghttp3_buf *buf) {
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return (size_t)(buf->end - buf->last);
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}
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size_t nghttp3_buf_len(const nghttp3_buf *buf) {
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return (size_t)(buf->last - buf->pos);
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}
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size_t nghttp3_buf_cap(const nghttp3_buf *buf) {
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return (size_t)(buf->end - buf->begin);
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}
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void nghttp3_buf_reset(nghttp3_buf *buf) { buf->pos = buf->last = buf->begin; }
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int nghttp3_buf_reserve(nghttp3_buf *buf, size_t size, const nghttp3_mem *mem) {
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uint8_t *p;
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nghttp3_ssize pos_offset, last_offset;
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if ((size_t)(buf->end - buf->begin) >= size) {
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return 0;
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}
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pos_offset = buf->pos - buf->begin;
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last_offset = buf->last - buf->begin;
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p = nghttp3_mem_realloc(mem, buf->begin, size);
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if (p == NULL) {
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return NGHTTP3_ERR_NOMEM;
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}
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buf->begin = p;
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buf->end = p + size;
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buf->pos = p + pos_offset;
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buf->last = p + last_offset;
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return 0;
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}
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void nghttp3_buf_swap(nghttp3_buf *a, nghttp3_buf *b) {
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nghttp3_buf c = *a;
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*a = *b;
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*b = c;
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}
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void nghttp3_typed_buf_init(nghttp3_typed_buf *tbuf, const nghttp3_buf *buf,
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nghttp3_buf_type type) {
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tbuf->buf = *buf;
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tbuf->type = type;
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}
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