1/* 2 * nghttp2 - HTTP/2 C Library 3 * 4 * Copyright (c) 2012 Tatsuhiro Tsujikawa 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining 7 * a copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sublicense, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be 15 * included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 */ 25#include "nghttp2_gzip.h" 26 27#include <assert.h> 28 29int nghttp2_gzip_inflate_new(nghttp2_gzip **inflater_ptr) { 30 int rv; 31 *inflater_ptr = calloc(1, sizeof(nghttp2_gzip)); 32 if (*inflater_ptr == NULL) { 33 return -1; 34 } 35 rv = inflateInit2(&(*inflater_ptr)->zst, 47); 36 if (rv != Z_OK) { 37 free(*inflater_ptr); 38 return -1; 39 } 40 return 0; 41} 42 43void nghttp2_gzip_inflate_del(nghttp2_gzip *inflater) { 44 if (inflater != NULL) { 45 inflateEnd(&inflater->zst); 46 free(inflater); 47 } 48} 49 50int nghttp2_gzip_inflate(nghttp2_gzip *inflater, uint8_t *out, 51 size_t *outlen_ptr, const uint8_t *in, 52 size_t *inlen_ptr) { 53 int rv; 54 if (inflater->finished) { 55 return -1; 56 } 57 inflater->zst.avail_in = (unsigned int)*inlen_ptr; 58 inflater->zst.next_in = (unsigned char *)in; 59 inflater->zst.avail_out = (unsigned int)*outlen_ptr; 60 inflater->zst.next_out = out; 61 62 rv = inflate(&inflater->zst, Z_NO_FLUSH); 63 64 *inlen_ptr -= inflater->zst.avail_in; 65 *outlen_ptr -= inflater->zst.avail_out; 66 switch (rv) { 67 case Z_STREAM_END: 68 inflater->finished = 1; 69 /* FALL THROUGH */ 70 case Z_OK: 71 case Z_BUF_ERROR: 72 return 0; 73 case Z_DATA_ERROR: 74 case Z_STREAM_ERROR: 75 case Z_NEED_DICT: 76 case Z_MEM_ERROR: 77 return -1; 78 default: 79 assert(0); 80 /* We need this for some compilers */ 81 return 0; 82 } 83} 84 85int nghttp2_gzip_inflate_finished(nghttp2_gzip *inflater) { 86 return inflater->finished; 87} 88