1 | //vio_gzip.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | #ifdef ROAR_HAVE_LIBZ |
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39 | |
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40 | #include <zlib.h> |
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41 | |
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42 | struct roar_vio_gzip { |
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43 | struct roar_vio_calls * next; |
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44 | struct roar_buffer * outbuf, * inbuf; |
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45 | int compressor_error, decompressor_error; |
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46 | int compressor_flush; |
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47 | int compressor_used; |
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48 | z_stream compressor, decompressor; |
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49 | gz_header gz_compressorheader, gz_decompressorheader; |
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50 | }; |
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51 | |
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52 | static void * _zalloc(voidpf opaque, uInt items, uInt size) { |
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53 | (void)opaque; |
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54 | return roar_mm_calloc(items, size); |
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55 | } |
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56 | |
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57 | static void _zfree(voidpf opaque, voidpf address) { |
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58 | (void)opaque; |
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59 | roar_mm_free(address); |
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60 | } |
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61 | |
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62 | static void _set_error (int error) { |
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63 | int raerror = ROAR_ERROR_UNKNOWN; |
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64 | |
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65 | switch (error) { |
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66 | case Z_OK: raerror = ROAR_ERROR_NONE; break; |
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67 | case Z_STREAM_END: raerror = ROAR_ERROR_NODATA; break; |
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68 | case Z_NEED_DICT: raerror = ROAR_ERROR_INVAL; break; |
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69 | case Z_ERRNO: roar_err_from_errno(); break; |
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70 | case Z_STREAM_ERROR: raerror = ROAR_ERROR_INVAL; break; |
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71 | case Z_DATA_ERROR: raerror = ROAR_ERROR_BADCKSUM; break; |
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72 | case Z_MEM_ERROR: raerror = ROAR_ERROR_NOMEM; break; |
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73 | case Z_BUF_ERROR: raerror = ROAR_ERROR_FAULT; break; |
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74 | case Z_VERSION_ERROR: raerror = ROAR_ERROR_BADVERSION; break; |
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75 | } |
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76 | |
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77 | ROAR_DBG("_set_error(error=%i): raerror=%s", error, roar_error2str(raerror)); |
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78 | roar_err_set(raerror); |
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79 | } |
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80 | |
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81 | static int _init(struct roar_vio_gzip * self, struct roar_vio_calls * dst, int level, int gzip) { |
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82 | int ret; |
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83 | |
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84 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = ?", self, dst, level, gzip); |
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85 | |
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86 | if ( self == NULL ) { |
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87 | roar_err_set(ROAR_ERROR_FAULT); |
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88 | return -1; |
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89 | } |
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90 | |
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91 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = ?", self, dst, level, gzip); |
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92 | |
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93 | if ( level == -1 ) { |
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94 | level = Z_DEFAULT_COMPRESSION; |
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95 | } |
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96 | |
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97 | memset(self, 0, sizeof(struct roar_vio_gzip)); |
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98 | |
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99 | self->next = dst; |
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100 | |
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101 | self->outbuf = NULL; |
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102 | self->inbuf = NULL; |
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103 | |
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104 | self->compressor_error = ROAR_ERROR_NONE; |
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105 | self->decompressor_error = ROAR_ERROR_NONE; |
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106 | |
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107 | self->compressor_flush = Z_SYNC_FLUSH; |
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108 | self->compressor_used = 0; |
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109 | |
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110 | self->compressor.zalloc = _zalloc; |
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111 | self->compressor.zfree = _zfree; |
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112 | self->compressor.opaque = NULL; |
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113 | self->compressor.next_in = NULL; |
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114 | self->compressor.next_out = NULL; |
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115 | |
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116 | self->decompressor.zalloc = _zalloc; |
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117 | self->decompressor.zfree = _zfree; |
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118 | self->decompressor.opaque = NULL; |
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119 | self->decompressor.next_in = NULL; |
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120 | self->decompressor.next_out = NULL; |
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121 | |
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122 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = ?", self, dst, level, gzip); |
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123 | |
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124 | // for the magic numbers: see the zlib.h header file. There are no const for them. |
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125 | if ( (ret = deflateInit2(&(self->compressor), level, Z_DEFLATED, 15 + (gzip ? 16 : 0), 8, Z_DEFAULT_STRATEGY)) != Z_OK ) { |
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126 | _set_error(ret); |
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127 | return -1; |
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128 | } |
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129 | |
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130 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = ?", self, dst, level, gzip); |
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131 | |
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132 | if ( (ret = inflateInit2(&(self->decompressor), 15+32)) != Z_OK ) { |
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133 | deflateEnd(&(self->compressor)); |
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134 | _set_error(ret); |
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135 | return -1; |
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136 | } |
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137 | |
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138 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = ?", self, dst, level, gzip); |
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139 | |
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140 | // gzheader is descriped in RFC1952. |
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141 | memset(&(self->gz_compressorheader), 0, sizeof(self->gz_compressorheader)); |
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142 | self->gz_compressorheader.os = 255; // os='unknown' |
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143 | self->gz_compressorheader.hcrc = 0; // for compatibility |
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144 | |
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145 | memset(&(self->gz_decompressorheader), 0, sizeof(self->gz_decompressorheader)); |
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146 | self->gz_decompressorheader.os = 255; // os='unknown' |
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147 | self->gz_decompressorheader.hcrc = 0; // for compatibility |
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148 | |
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149 | if ( gzip ) { |
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150 | if ( (ret = deflateSetHeader(&(self->compressor), &(self->gz_compressorheader))) != Z_OK ) { |
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151 | deflateEnd(&(self->compressor)); |
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152 | inflateEnd(&(self->decompressor)); |
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153 | _set_error(ret); |
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154 | return -1; |
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155 | } |
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156 | } |
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157 | |
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158 | ROAR_DBG("_init(self=%p, dst=%p, level=%i, gzip=%i) = 0", self, dst, level, gzip); |
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159 | |
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160 | return 0; |
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161 | } |
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162 | |
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163 | static ssize_t roar_vio_zlib_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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164 | struct roar_vio_gzip * self = vio->inst; |
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165 | struct roar_buffer * leftbuf; |
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166 | void * leftbufdata; |
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167 | size_t buflen; |
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168 | ssize_t len; |
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169 | size_t have = 0; |
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170 | int ret; |
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171 | unsigned char inbuf[1024]; |
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172 | |
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173 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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174 | |
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175 | if ( self->decompressor_error != ROAR_ERROR_NONE ) { |
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176 | roar_err_set(self->decompressor_error); |
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177 | return -1; |
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178 | } |
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179 | |
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180 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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181 | |
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182 | while ( self->inbuf != NULL ) { |
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183 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): self->inbuf=%p", vio, buf, (long long unsigned)count, self->inbuf); |
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184 | if ( roar_buffer_get_data(self->inbuf, &leftbufdata) == -1 ) |
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185 | return -1; |
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186 | if ( roar_buffer_get_len(self->inbuf, &buflen) == -1 ) |
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187 | return -1; |
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188 | |
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189 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count, self->inbuf); |
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190 | |
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191 | self->decompressor.next_out = buf; |
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192 | self->decompressor.avail_out = count; |
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193 | |
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194 | self->decompressor.next_in = leftbufdata; |
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195 | self->decompressor.avail_in = buflen; |
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196 | |
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197 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): in: %llu Bytes, out: count Bytes.", vio, buf, (long long unsigned)count, (long long unsigned int)buflen); |
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198 | |
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199 | ret = inflate(&(self->decompressor), Z_NO_FLUSH); |
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200 | |
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201 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): inflate() returned %i", vio, buf, (long long unsigned)count, ret); |
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202 | |
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203 | len = count - self->decompressor.avail_out; |
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204 | |
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205 | if ( ret == Z_STREAM_END ) { |
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206 | count = len; |
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207 | ret = Z_OK; |
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208 | } |
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209 | |
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210 | if ( ret != Z_OK ) { |
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211 | if ( len == 0 ) { |
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212 | _set_error(ret); |
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213 | return -1; |
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214 | } else { |
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215 | have += len; |
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216 | return have; |
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217 | } |
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218 | } |
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219 | |
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220 | buf += len; |
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221 | have += len; |
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222 | count -= len; |
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223 | |
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224 | if ( len == (ssize_t)buflen ) { |
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225 | ret = roar_buffer_next(&(self->inbuf)); |
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226 | } else { |
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227 | ret = roar_buffer_set_offset(self->inbuf, len); |
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228 | } |
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229 | |
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230 | if ( ret == -1 ) { |
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231 | roar_err_set((self->decompressor_error = ROAR_ERROR_LOSTSYNC)); |
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232 | return -1; |
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233 | } |
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234 | |
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235 | if ( count == 0 ) |
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236 | return have; |
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237 | } |
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238 | |
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239 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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240 | |
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241 | self->decompressor.next_out = buf; |
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242 | self->decompressor.avail_out = count; |
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243 | |
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244 | self->decompressor.next_in = NULL; |
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245 | self->decompressor.avail_in = 0; |
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246 | |
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247 | while (self->decompressor.avail_out > 0) { |
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248 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): generating new output...", vio, buf, (long long unsigned)count); |
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249 | |
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250 | if ( self->decompressor.avail_in == 0 ) { |
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251 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): reading more data", vio, buf, (long long unsigned)count); |
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252 | |
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253 | len = roar_vio_read(self->next, inbuf, sizeof(inbuf)); |
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254 | if ( len == -1 ) { |
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255 | have += count - self->decompressor.avail_out; |
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256 | if ( have == 0 ) { |
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257 | // error is still set (by roar_vio_read()). |
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258 | return -1; |
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259 | } else { |
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260 | return 0; |
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261 | } |
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262 | } else if ( len == 0 ) { |
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263 | break; |
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264 | } |
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265 | |
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266 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): len=%llu", vio, buf, (long long unsigned)count, (long long unsigned)len); |
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267 | |
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268 | self->decompressor.next_in = inbuf; |
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269 | self->decompressor.avail_in = len; |
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270 | } |
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271 | |
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272 | ret = inflate(&(self->decompressor), Z_NO_FLUSH); |
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273 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu): inflate() returned %i", vio, buf, (long long unsigned)count, ret); |
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274 | |
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275 | if ( ret == Z_STREAM_END ) |
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276 | ret = Z_OK; |
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277 | |
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278 | if ( ret != Z_OK ) { |
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279 | if ( (count - self->decompressor.avail_out) == 0 ) { |
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280 | _set_error(ret); |
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281 | return -1; |
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282 | } else { |
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283 | break; |
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284 | } |
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285 | } |
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286 | |
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287 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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288 | } |
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289 | |
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290 | if ( self->decompressor.avail_in != 0 ) { |
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291 | if ( roar_buffer_new_data(&leftbuf, self->decompressor.avail_in, &leftbufdata) == -1 ) { |
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292 | roar_err_set((self->decompressor_error = ROAR_ERROR_LOSTSYNC)); |
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293 | return -1; |
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294 | } |
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295 | |
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296 | memcpy(leftbufdata, self->decompressor.next_in, self->decompressor.avail_in); |
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297 | |
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298 | if ( self->inbuf == NULL ) { |
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299 | self->inbuf = leftbuf; |
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300 | } else { |
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301 | if ( roar_buffer_moveinto(self->inbuf, &leftbuf) == -1 ) { |
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302 | roar_buffer_free(leftbuf); |
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303 | roar_err_set((self->decompressor_error = ROAR_ERROR_LOSTSYNC)); |
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304 | return -1; |
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305 | } |
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306 | } |
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307 | } |
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308 | |
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309 | have += count - self->decompressor.avail_out; |
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310 | |
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311 | ROAR_DBG("roar_vio_zlib_read(vio=%p, buf=%p, count=%llu) = %llu", vio, buf, (long long unsigned)count, (long long unsigned)have); |
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312 | |
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313 | return have; |
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314 | } |
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315 | |
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316 | static ssize_t roar_vio_zlib_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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317 | struct roar_vio_gzip * self = vio->inst; |
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318 | struct roar_buffer * leftbuf; |
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319 | void * leftbufdata; |
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320 | size_t outlen; |
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321 | size_t buflen; |
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322 | char outbuf[1024]; |
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323 | ssize_t len; |
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324 | int ret; |
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325 | |
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326 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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327 | |
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328 | self->compressor_used = 1; |
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329 | |
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330 | if ( self->compressor_error != ROAR_ERROR_NONE ) { |
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331 | roar_err_set(self->compressor_error); |
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332 | return -1; |
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333 | } |
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334 | |
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335 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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336 | |
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337 | while (self->outbuf != NULL) { |
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338 | if ( roar_buffer_get_data(self->outbuf, &leftbufdata) == -1 ) |
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339 | return -1; |
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340 | if ( roar_buffer_get_len(self->outbuf, &buflen) == -1 ) |
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341 | return -1; |
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342 | |
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343 | len = roar_vio_write(self->next, leftbufdata, buflen); |
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344 | if ( len == -1 ) { |
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345 | return -1; |
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346 | } else if ( len == (ssize_t)buflen ) { |
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347 | if ( roar_buffer_next(&(self->outbuf)) == -1 ) { |
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348 | roar_err_set((self->compressor_error = ROAR_ERROR_LOSTSYNC)); |
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349 | return -1; |
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350 | } |
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351 | |
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352 | |
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353 | } else { |
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354 | if ( roar_buffer_set_offset(self->outbuf, len) == -1 ) { |
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355 | roar_err_set((self->compressor_error = ROAR_ERROR_LOSTSYNC)); |
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356 | return -1; |
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357 | } |
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358 | |
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359 | return 0; |
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360 | } |
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361 | } |
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362 | |
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363 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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364 | |
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365 | self->compressor.next_in = buf; |
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366 | self->compressor.avail_in = count; |
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367 | |
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368 | while (self->compressor.avail_in || count == 0) { |
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369 | self->compressor.next_out = (unsigned char *)outbuf; |
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370 | self->compressor.avail_out = sizeof(outbuf); |
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371 | outlen = self->compressor.total_out; |
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372 | |
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373 | ret = deflate(&(self->compressor), count == 0 ? self->compressor_flush : Z_NO_FLUSH); |
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374 | |
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375 | outlen = self->compressor.total_out - outlen; |
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376 | |
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377 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu): deflate() returned %i", vio, buf, (long long unsigned)count, ret); |
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378 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu): outlen=%llu", vio, buf, (long long unsigned)count, (long long unsigned int)outlen); |
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379 | |
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380 | if ( count != 0 && ret != Z_OK ) { |
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381 | len = count - self->compressor.avail_in; |
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382 | if ( len != 0 ) { |
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383 | return len; |
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384 | } else { |
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385 | _set_error(ret); |
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386 | return -1; |
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387 | } |
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388 | } |
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389 | |
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390 | if ( outlen != 0 ) { |
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391 | len = roar_vio_write(self->next, outbuf, outlen); |
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392 | |
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393 | if ( len < (ssize_t)outlen ) { |
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394 | if ( roar_buffer_new_data(&leftbuf, outlen - len, &leftbufdata) == -1 ) { |
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395 | roar_err_set((self->compressor_error = ROAR_ERROR_LOSTSYNC)); |
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396 | return -1; |
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397 | } |
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398 | |
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399 | memcpy(leftbufdata, outbuf+len, outlen - len); |
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400 | |
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401 | if ( self->outbuf == NULL ) { |
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402 | self->outbuf = leftbuf; |
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403 | } else { |
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404 | if ( roar_buffer_moveinto(self->outbuf, &leftbuf) == -1 ) { |
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405 | roar_buffer_free(leftbuf); |
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406 | roar_err_set((self->compressor_error = ROAR_ERROR_LOSTSYNC)); |
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407 | return -1; |
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408 | } |
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409 | } |
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410 | break; |
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411 | } |
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412 | } |
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413 | |
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414 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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415 | |
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416 | if ( count == 0 && ( |
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417 | (self->compressor_flush == Z_FINISH && ret == Z_STREAM_END) || |
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418 | (self->compressor_flush != Z_FINISH && ret == Z_BUF_ERROR) ) ) |
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419 | return 0; |
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420 | |
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421 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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422 | } |
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423 | |
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424 | len = count - self->compressor.avail_in; |
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425 | |
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426 | ROAR_DBG("roar_vio_zlib_write(vio=%p, buf=%p, count=%llu) = %llu", vio, buf, (long long unsigned)count, (long long unsigned int)len); |
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427 | |
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428 | return len; |
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429 | } |
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430 | |
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431 | static roar_off_t roar_vio_zlib_lseek (struct roar_vio_calls * vio, roar_off_t offset, int whence) { |
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432 | (void)vio, (void)offset, (void)whence; |
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433 | roar_err_set(ROAR_ERROR_NOSYS); |
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434 | return (roar_off_t)-1; |
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435 | } |
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436 | |
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437 | static int roar_vio_zlib_sync (struct roar_vio_calls * vio) { |
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438 | struct roar_vio_gzip * self = vio->inst; |
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439 | |
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440 | if ( self->compressor_used ) |
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441 | if ( self->compressor_error == ROAR_ERROR_NONE ) |
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442 | if ( roar_vio_zlib_write(vio, NULL, 0) == -1 ) |
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443 | return -1; |
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444 | |
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445 | roar_err_set(ROAR_ERROR_NOSYS); |
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446 | return -1; |
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447 | } |
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448 | |
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449 | static int roar_vio_zlib_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) { |
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450 | struct roar_vio_gzip * self; |
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451 | |
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452 | if ( vio == NULL ) { |
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453 | roar_err_set(ROAR_ERROR_FAULT); |
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454 | return -1; |
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455 | } |
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456 | |
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457 | self = vio->inst; |
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458 | |
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459 | switch (cmd) { |
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460 | case ROAR_VIO_CTL_GET_NAME: |
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461 | if ( data == NULL ) |
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462 | return -1; |
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463 | |
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464 | *(char**)data = "zlib"; |
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465 | return 0; |
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466 | break; |
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467 | case ROAR_VIO_CTL_GET_NEXT: |
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468 | *(struct roar_vio_calls **)data = self->next; |
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469 | return 0; |
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470 | break; |
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471 | case ROAR_VIO_CTL_GET_FH: |
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472 | case ROAR_VIO_CTL_GET_READ_FH: |
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473 | case ROAR_VIO_CTL_GET_WRITE_FH: |
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474 | case ROAR_VIO_CTL_GET_SELECT_FH: |
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475 | case ROAR_VIO_CTL_GET_SELECT_READ_FH: |
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476 | case ROAR_VIO_CTL_GET_SELECT_WRITE_FH: |
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477 | roar_err_set(ROAR_ERROR_NOTSUP); |
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478 | return -1; |
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479 | break; |
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480 | case ROAR_VIO_CTL_NONBLOCK: |
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481 | return roar_vio_ctl(self->next, cmd, data); |
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482 | break; |
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483 | default: |
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484 | roar_err_set(ROAR_ERROR_BADRQC); |
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485 | return -1; |
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486 | } |
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487 | } |
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488 | |
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489 | static int roar_vio_zlib_close (struct roar_vio_calls * vio) { |
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490 | struct roar_vio_gzip * self; |
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491 | |
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492 | if ( vio == NULL ) { |
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493 | roar_err_set(ROAR_ERROR_FAULT); |
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494 | return -1; |
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495 | } |
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496 | |
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497 | self = vio->inst; |
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498 | |
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499 | self->compressor_flush = Z_FINISH; |
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500 | |
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501 | roar_vio_zlib_sync(vio); |
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502 | |
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503 | deflateEnd(&(self->compressor)); |
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504 | inflateEnd(&(self->decompressor)); |
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505 | |
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506 | if ( self->outbuf != NULL ) |
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507 | roar_buffer_free(self->outbuf); |
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508 | if ( self->inbuf != NULL ) |
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509 | roar_buffer_free(self->inbuf); |
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510 | |
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511 | roar_mm_free(self); |
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512 | |
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513 | return 0; |
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514 | } |
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515 | |
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516 | int roar_vio_open_zlib(struct roar_vio_calls * calls, struct roar_vio_calls * dst, int level, int gzip) { |
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517 | struct roar_vio_gzip * self; |
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518 | int err; |
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519 | |
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520 | ROAR_DBG("roar_vio_open_zlib(calls=%p, dst=%p, level=%i, gzip=%i) = ?", calls, dst, level, gzip); |
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521 | |
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522 | if ( calls == NULL || dst == NULL ) { |
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523 | roar_err_set(ROAR_ERROR_FAULT); |
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524 | return -1; |
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525 | } |
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526 | |
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527 | self = roar_mm_malloc(sizeof(struct roar_vio_gzip)); |
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528 | |
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529 | if ( _init(self, dst, level, gzip) == -1 ) { |
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530 | err = roar_error; |
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531 | roar_mm_free(self); |
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532 | roar_err_set(err); |
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533 | ROAR_DBG("roar_vio_open_zlib(calls=%p, dst=%p, level=%i, gzip=%i) = -1 // error=%s", calls, dst, level, gzip, roar_error2str(err)); |
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534 | return -1; |
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535 | } |
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536 | |
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537 | ROAR_DBG("roar_vio_open_zlib(calls=%p, dst=%p, level=%i, gzip=%i) = ?", calls, dst, level, gzip); |
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538 | |
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539 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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540 | calls->flags = ROAR_VIO_FLAGS_NONE; |
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541 | calls->refc = 1; |
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542 | |
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543 | calls->inst = self; |
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544 | calls->read = roar_vio_zlib_read; |
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545 | calls->write = roar_vio_zlib_write; |
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546 | calls->lseek = roar_vio_zlib_lseek; |
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547 | calls->sync = roar_vio_zlib_sync; |
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548 | calls->ctl = roar_vio_zlib_ctl; |
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549 | calls->close = roar_vio_zlib_close; |
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550 | |
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551 | ROAR_DBG("roar_vio_open_zlib(calls=%p, dst=%p, level=%i, gzip=%i) = 0", calls, dst, level, gzip); |
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552 | |
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553 | return 0; |
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554 | } |
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555 | |
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556 | #endif |
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557 | |
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558 | //ll |
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