123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
/*
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* nghttp2 - HTTP/2.0 C 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 NGHTTP2_ZLIB_H
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#define NGHTTP2_ZLIB_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 <zlib.h>
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#include "nghttp2_buffer.h"
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/* This structure is used for both deflater and inflater. */
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typedef struct {
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z_stream zst;
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/* The protocol version to select the dictionary later. */
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uint16_t version;
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} nghttp2_zlib;
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/*
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* Initializes |deflater| for deflating name/values pairs in the frame
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* of the protocol version |version|. If the |comp| is zero,
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* compression level becomes 0, which means no compression.
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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 error codes:
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*
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* NGHTTP2_ERR_ZLIB
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* The z_stream initialization failed.
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* NGHTTP2_ERR_UNSUPPORTED_VERSION
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* The version is not supported.
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*/
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int nghttp2_zlib_deflate_hd_init(nghttp2_zlib *deflater, int comp,
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uint16_t version);
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/*
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* Initializes |inflater| for inflating name/values pairs in the
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* frame of the protocol version |version|.
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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 error codes:
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*
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* NGHTTP2_ERR_ZLIB
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* The z_stream initialization failed.
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* NGHTTP2_ERR_UNSUPPORTED_VERSION
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* The version is not supported.
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*/
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int nghttp2_zlib_inflate_hd_init(nghttp2_zlib *inflater, uint16_t version);
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/*
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* Deallocates any resources allocated for |deflater|.
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*/
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void nghttp2_zlib_deflate_free(nghttp2_zlib *deflater);
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/*
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* Deallocates any resources allocated for |inflater|.
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*/
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void nghttp2_zlib_inflate_free(nghttp2_zlib *inflater);
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/*
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* Returns the maximum length when |len| bytes of data are deflated by
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* |deflater|.
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*/
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size_t nghttp2_zlib_deflate_hd_bound(nghttp2_zlib *deflater, size_t len);
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/*
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* Deflates data stored in |in| with length |inlen|. The output is
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* written to |out| with length |outlen|. This is not a strict
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* requirement but |outlen| should have at least
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* nghttp2_zlib_deflate_hd_bound(|inlen|) bytes for successful
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* operation.
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*
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* This function returns the number of bytes outputted if it succeeds,
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* or one of the following negative error codes:
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*
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* NGHTTP2_ERR_ZLIB
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* The deflate operation failed.
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*/
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ssize_t nghttp2_zlib_deflate_hd(nghttp2_zlib *deflater,
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uint8_t *out, size_t outlen,
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const uint8_t *in, size_t inlen);
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/*
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* Inflates data stored in |in| with length |inlen|. The output is
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* added to |buf|.
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*
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* This function returns the number of bytes outputted if it succeeds,
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* or one of the following negative error codes:
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*
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* NGHTTP2_ERR_ZLIB
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* The inflate operation failed.
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*
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* NGHTTP2_ERR_NOMEM
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* Out of memory.
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*/
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ssize_t nghttp2_zlib_inflate_hd(nghttp2_zlib *inflater,
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nghttp2_buffer* buf,
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const uint8_t *in, size_t inlen);
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#endif /* NGHTTP2_ZLIB_H */
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