1 /* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3 Copyright (C) 2010 Red Hat, Inc.
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 */
18 #include "config.h"
19
20 #include "decode.h"
21
22 #ifndef __GNUC__
23 #define ZLIB_WINAPI
24 #endif
25
26 #include <zlib.h>
27
28 typedef struct GlibZlibDecoder
29 {
30 SpiceZlibDecoder base;
31 z_stream _z_strm;
32 } GlibZlibDecoder;
33
decode(SpiceZlibDecoder * decoder,uint8_t * data,int data_size,uint8_t * dest,int dest_size)34 static void decode(SpiceZlibDecoder *decoder,
35 uint8_t *data, int data_size,
36 uint8_t *dest, int dest_size)
37 {
38 GlibZlibDecoder *d = SPICE_CONTAINEROF(decoder, GlibZlibDecoder, base);
39 int z_ret;
40
41 inflateReset(&d->_z_strm);
42 d->_z_strm.next_in = data;
43 d->_z_strm.avail_in = data_size;
44 d->_z_strm.next_out = dest;
45 d->_z_strm.avail_out = dest_size;
46
47 z_ret = inflate(&d->_z_strm, Z_FINISH);
48
49 if (z_ret != Z_STREAM_END) {
50 g_warning("zlib inflate failed, error %d", z_ret);
51 }
52 }
53
54 static SpiceZlibDecoderOps zlib_decoder_ops = {
55 .decode = decode,
56 };
57
zlib_decoder_new(void)58 SpiceZlibDecoder *zlib_decoder_new(void)
59 {
60 GlibZlibDecoder *d = g_new0(GlibZlibDecoder, 1);
61 int z_ret;
62
63 d->_z_strm.zalloc = Z_NULL;
64 d->_z_strm.zfree = Z_NULL;
65 d->_z_strm.opaque = Z_NULL;
66 d->_z_strm.next_in = Z_NULL;
67 d->_z_strm.avail_in = 0;
68 z_ret = inflateInit(&d->_z_strm);
69 if (z_ret != Z_OK) {
70 g_warning("zlib decoder init failed, error %d", z_ret);
71 goto fail;
72 }
73
74 d->base.ops = &zlib_decoder_ops;
75
76 return &d->base;
77
78 fail:
79 g_free(d);
80 return NULL;
81 }
82
zlib_decoder_destroy(SpiceZlibDecoder * decoder)83 void zlib_decoder_destroy(SpiceZlibDecoder *decoder)
84 {
85 GlibZlibDecoder *d = SPICE_CONTAINEROF(decoder, GlibZlibDecoder, base);
86
87 inflateEnd(&d->_z_strm);
88 g_free(d);
89 }
90