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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "nghttp2_gzip.h"
#include <assert.h>
int nghttp2_gzip_inflate_new(nghttp2_gzip **inflater_ptr) {
int rv;
*inflater_ptr = malloc(sizeof(nghttp2_gzip));
if (*inflater_ptr == NULL) {
return -1;
}
(*inflater_ptr)->finished = 0;
(*inflater_ptr)->zst.next_in = Z_NULL;
(*inflater_ptr)->zst.avail_in = 0;
(*inflater_ptr)->zst.zalloc = Z_NULL;
(*inflater_ptr)->zst.zfree = Z_NULL;
(*inflater_ptr)->zst.opaque = Z_NULL;
rv = inflateInit2(&(*inflater_ptr)->zst, 47);
if (rv != Z_OK) {
free(*inflater_ptr);
return -1;
}
return 0;
}
void nghttp2_gzip_inflate_del(nghttp2_gzip *inflater) {
if (inflater != NULL) {
inflateEnd(&inflater->zst);
free(inflater);
}
}
int nghttp2_gzip_inflate(nghttp2_gzip *inflater, uint8_t *out,
size_t *outlen_ptr, const uint8_t *in,
size_t *inlen_ptr) {
int rv;
if (inflater->finished) {
return -1;
}
inflater->zst.avail_in = (unsigned int)*inlen_ptr;
inflater->zst.next_in = (unsigned char *)in;
inflater->zst.avail_out = (unsigned int)*outlen_ptr;
inflater->zst.next_out = out;
rv = inflate(&inflater->zst, Z_NO_FLUSH);
*inlen_ptr -= inflater->zst.avail_in;
*outlen_ptr -= inflater->zst.avail_out;
switch (rv) {
case Z_STREAM_END:
inflater->finished = 1;
/* FALL THROUGH */
case Z_OK:
case Z_BUF_ERROR:
return 0;
case Z_DATA_ERROR:
case Z_STREAM_ERROR:
case Z_NEED_DICT:
case Z_MEM_ERROR:
return -1;
default:
assert(0);
/* We need this for some compilers */
return 0;
}
}
int nghttp2_gzip_inflate_finished(nghttp2_gzip *inflater) {
return inflater->finished;
}
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