mirror of
https://github.com/moparisthebest/spdylay
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98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/*
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* Spdylay - SPDY Library
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*
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* Copyright (c) 2012 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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#ifndef SPDYLAY_BUFFER_H
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#define SPDYLAY_BUFFER_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <spdylay/spdylay.h>
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typedef struct spdylay_buffer_chunk {
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uint8_t *data;
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struct spdylay_buffer_chunk *next;
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} spdylay_buffer_chunk;
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/*
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* List of fixed sized chunks
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*/
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typedef struct {
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/* Capacity of each chunk buffer */
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size_t capacity;
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/* Root of list of chunk buffers. The root is dummy and its data
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member is always NULL. */
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spdylay_buffer_chunk root;
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/* Points to the current chunk to write */
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spdylay_buffer_chunk *current;
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/* Total length of this buffer */
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size_t len;
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/* Offset of last chunk buffer */
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size_t last_offset;
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} spdylay_buffer;
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/*
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* Initializes buffer with fixed chunk size chunk_capacity.
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*/
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void spdylay_buffer_init(spdylay_buffer *buffer, size_t chunk_capacity);
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/* Releases allocated memory for buffer */
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void spdylay_buffer_free(spdylay_buffer *buffer);
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/* Returns buffer pointer */
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uint8_t* spdylay_buffer_get(spdylay_buffer *buffer);
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/* Returns available buffer length */
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size_t spdylay_buffer_avail(spdylay_buffer *buffer);
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/* Advances buffer pointer by amount. This reduces available buffer
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length. */
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void spdylay_buffer_advance(spdylay_buffer *buffer, size_t amount);
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/*
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* Allocate new chunk buffer. This will increase total length of
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* buffer (returned by spdylay_buffer_length) by capacity-last_offset.
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* It means untouched buffer is assumued to be written.
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*
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* This function returns 0 if it succeeds, or one of the following
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* negative eror codes:
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*
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* SPDYLAY_ERR_NOMEM
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* Out of memory.
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*/
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int spdylay_buffer_alloc(spdylay_buffer *buffer);
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/* Returns total length of buffer */
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size_t spdylay_buffer_length(spdylay_buffer *buffer);
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/* Returns capacity of each fixed chunk buffer */
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size_t spdylay_buffer_capacity(spdylay_buffer *buffer);
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/* Stores the contents of buffer into |buf|. |buf| must be at least
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spdylay_buffer_length(buffer) bytes long. */
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void spdylay_buffer_serialize(spdylay_buffer *buffer, uint8_t *buf);
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/* Reset |buffer| for reuse. Set the total length of buffer to 0.
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Next spdylay_buffer_avail() returns 0. This function does not free
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allocated memory space; they are reused. */
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void spdylay_buffer_reset(spdylay_buffer *buffer);
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#endif /* SPDYLAY_BUFFER_H */
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