87 lines
2.6 KiB
C
87 lines
2.6 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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#include "spdylay_gzip.h"
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#include <assert.h>
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int spdylay_gzip_inflate_new(spdylay_gzip **inflater_ptr)
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{
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int rv;
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*inflater_ptr = malloc(sizeof(spdylay_gzip));
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if(*inflater_ptr == NULL) {
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return SPDYLAY_ERR_NOMEM;
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}
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(*inflater_ptr)->zst.next_in = Z_NULL;
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(*inflater_ptr)->zst.avail_in = 0;
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(*inflater_ptr)->zst.zalloc = Z_NULL;
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(*inflater_ptr)->zst.zfree = Z_NULL;
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(*inflater_ptr)->zst.opaque = Z_NULL;
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rv = inflateInit2(&(*inflater_ptr)->zst, 47);
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if(rv != Z_OK) {
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free(*inflater_ptr);
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return SPDYLAY_ERR_GZIP;
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}
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return 0;
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}
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void spdylay_gzip_inflate_del(spdylay_gzip *inflater)
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{
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if(inflater != NULL) {
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inflateEnd(&inflater->zst);
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free(inflater);
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}
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}
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int spdylay_gzip_inflate(spdylay_gzip *inflater,
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uint8_t *out, size_t *outlen_ptr,
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const uint8_t *in, size_t *inlen_ptr)
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{
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int rv;
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inflater->zst.avail_in = *inlen_ptr;
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inflater->zst.next_in = (unsigned char*)in;
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inflater->zst.avail_out = *outlen_ptr;
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inflater->zst.next_out = out;
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rv = inflate(&inflater->zst, Z_NO_FLUSH);
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*inlen_ptr -= inflater->zst.avail_in;
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*outlen_ptr -= inflater->zst.avail_out;
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switch(rv) {
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case Z_OK:
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case Z_STREAM_END:
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case Z_BUF_ERROR:
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return 0;
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case Z_DATA_ERROR:
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case Z_STREAM_ERROR:
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case Z_NEED_DICT:
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case Z_MEM_ERROR:
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return SPDYLAY_ERR_GZIP;
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default:
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assert(0);
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/* We need this for some compilers */
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return 0;
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}
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}
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