tests/test_filter_flags.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       test_filter_flags.c
   4 /// \brief      Tests Filter Flags coders
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #include "tests.h"
  14
  15
  16 static uint8_t buffer[4096];
  17 static lzma_filter known_flags;
  18 static lzma_filter decoded_flags;
  19 static lzma_stream strm = LZMA_STREAM_INIT;
  20
  21
  22 static bool
  23 encode(uint32_t known_size)
  24 {
  25         memcrap(buffer, sizeof(buffer));
  26
  27         uint32_t tmp;
  28         if (lzma_filter_flags_size(&tmp, &known_flags) != LZMA_OK)
  29                 return true;
  30
  31         if (tmp != known_size)
  32                 return true;
  33
  34         size_t out_pos = 0;
  35         if (lzma_filter_flags_encode(&known_flags,
  36                         buffer, &out_pos, known_size) != LZMA_OK)
  37                 return true;
  38
  39         if (out_pos != known_size)
  40                 return true;
  41
  42         return false;
  43 }
  44
  45
  46 static bool
  47 decode_ret(uint32_t known_size, lzma_ret expected_ret)
  48 {
  49         memcrap(&decoded_flags, sizeof(decoded_flags));
  50
  51         size_t pos = 0;
  52         if (lzma_filter_flags_decode(&decoded_flags, NULL,
  53                                 buffer, &pos, known_size) != expected_ret
  54                         || pos != known_size)
  55                 return true;
  56
  57         return false;
  58 }
  59
  60
  61 static bool
  62 decode(uint32_t known_size)
  63 {
  64         if (decode_ret(known_size, LZMA_OK))
  65                 return true;
  66
  67         if (known_flags.id != decoded_flags.id)
  68                 return true;
  69
  70         return false;
  71 }
  72
  73
  74 #if defined(HAVE_ENCODER_X86) && defined(HAVE_DECODER_X86)
  75 static void
  76 test_bcj(void)
  77 {
  78         // Test 1
  79         known_flags.id = LZMA_FILTER_X86;
  80         known_flags.options = NULL;
  81
  82         expect(!encode(2));
  83         expect(!decode(2));
  84         expect(decoded_flags.options == NULL);
  85
  86         // Test 2
  87         lzma_options_bcj options;
  88         options.start_offset = 0;
  89         known_flags.options = &options;
  90         expect(!encode(2));
  91         expect(!decode(2));
  92         expect(decoded_flags.options == NULL);
  93
  94         // Test 3
  95         options.start_offset = 123456;
  96         known_flags.options = &options;
  97         expect(!encode(6));
  98         expect(!decode(6));
  99         expect(decoded_flags.options != NULL);
 100
 101         lzma_options_bcj *decoded = decoded_flags.options;
 102         expect(decoded->start_offset == options.start_offset);
 103
 104         free(decoded);
 105 }
 106 #endif
 107
 108
 109 #if defined(HAVE_ENCODER_DELTA) && defined(HAVE_DECODER_DELTA)
 110 static void
 111 test_delta(void)
 112 {
 113         // Test 1
 114         known_flags.id = LZMA_FILTER_DELTA;
 115         known_flags.options = NULL;
 116         expect(encode(99));
 117
 118         // Test 2
 119         lzma_options_delta options = {
 120                 .type = LZMA_DELTA_TYPE_BYTE,
 121                 .dist = 0
 122         };
 123         known_flags.options = &options;
 124         expect(encode(99));
 125
 126         // Test 3
 127         options.dist = LZMA_DELTA_DIST_MIN;
 128         expect(!encode(3));
 129         expect(!decode(3));
 130         expect(((lzma_options_delta *)(decoded_flags.options))->dist
 131                         == options.dist);
 132
 133         free(decoded_flags.options);
 134
 135         // Test 4
 136         options.dist = LZMA_DELTA_DIST_MAX;
 137         expect(!encode(3));
 138         expect(!decode(3));
 139         expect(((lzma_options_delta *)(decoded_flags.options))->dist
 140                         == options.dist);
 141
 142         free(decoded_flags.options);
 143
 144         // Test 5
 145         options.dist = LZMA_DELTA_DIST_MAX + 1;
 146         expect(encode(99));
 147 }
 148 #endif
 149
 150 /*
 151 #ifdef HAVE_FILTER_LZMA
 152 static void
 153 validate_lzma(void)
 154 {
 155         const lzma_options_lzma *known = known_flags.options;
 156         const lzma_options_lzma *decoded = decoded_flags.options;
 157
 158         expect(known->dictionary_size <= decoded->dictionary_size);
 159
 160         if (known->dictionary_size == 1)
 161                 expect(decoded->dictionary_size == 1);
 162         else
 163                 expect(known->dictionary_size + known->dictionary_size / 2
 164                                 > decoded->dictionary_size);
 165
 166         expect(known->literal_context_bits == decoded->literal_context_bits);
 167         expect(known->literal_pos_bits == decoded->literal_pos_bits);
 168         expect(known->pos_bits == decoded->pos_bits);
 169 }
 170
 171
 172 static void
 173 test_lzma(void)
 174 {
 175         // Test 1
 176         known_flags.id = LZMA_FILTER_LZMA1;
 177         known_flags.options = NULL;
 178         expect(encode(99));
 179
 180         // Test 2
 181         lzma_options_lzma options = {
 182                 .dictionary_size = 0,
 183                 .literal_context_bits = 0,
 184                 .literal_pos_bits = 0,
 185                 .pos_bits = 0,
 186                 .preset_dictionary = NULL,
 187                 .preset_dictionary_size = 0,
 188                 .mode = LZMA_MODE_INVALID,
 189                 .fast_bytes = 0,
 190                 .match_finder = LZMA_MF_INVALID,
 191                 .match_finder_cycles = 0,
 192         };
 193
 194         // Test 3 (empty dictionary not allowed)
 195         known_flags.options = &options;
 196         expect(encode(99));
 197
 198         // Test 4 (brute-force test some valid dictionary sizes)
 199         options.dictionary_size = LZMA_DICTIONARY_SIZE_MIN;
 200         while (options.dictionary_size != LZMA_DICTIONARY_SIZE_MAX) {
 201                 if (++options.dictionary_size == 5000)
 202                         options.dictionary_size = LZMA_DICTIONARY_SIZE_MAX - 5;
 203
 204                 expect(!encode(4));
 205                 expect(!decode(4));
 206                 validate_lzma();
 207
 208                 free(decoded_flags.options);
 209         }
 210
 211         // Test 5 (too big dictionary size)
 212         options.dictionary_size = LZMA_DICTIONARY_SIZE_MAX + 1;
 213         expect(encode(99));
 214
 215         // Test 6 (brute-force test lc/lp/pb)
 216         options.dictionary_size = LZMA_DICTIONARY_SIZE_MIN;
 217         for (uint32_t lc = LZMA_LITERAL_CONTEXT_BITS_MIN;
 218                         lc <= LZMA_LITERAL_CONTEXT_BITS_MAX; ++lc) {
 219                 for (uint32_t lp = LZMA_LITERAL_POS_BITS_MIN;
 220                                 lp <= LZMA_LITERAL_POS_BITS_MAX; ++lp) {
 221                         for (uint32_t pb = LZMA_POS_BITS_MIN;
 222                                         pb <= LZMA_POS_BITS_MAX; ++pb) {
 223                                 if (lc + lp > LZMA_LITERAL_BITS_MAX)
 224                                         continue;
 225
 226                                 options.literal_context_bits = lc;
 227                                 options.literal_pos_bits = lp;
 228                                 options.pos_bits = pb;
 229
 230                                 expect(!encode(4));
 231                                 expect(!decode(4));
 232                                 validate_lzma();
 233
 234                                 free(decoded_flags.options);
 235                         }
 236                 }
 237         }
 238 }
 239 #endif
 240 */
 241
 242 int
 243 main(void)
 244 {
 245 #if defined(HAVE_ENCODER_X86) && defined(HAVE_DECODER_X86)
 246         test_bcj();
 247 #endif
 248 #if defined(HAVE_ENCODER_DELTA) && defined(HAVE_DECODER_DELTA)
 249         test_delta();
 250 #endif
 251 // #ifdef HAVE_FILTER_LZMA
 252 //      test_lzma();
 253 // #endif
 254
 255         lzma_end(&strm);
 256
 257         return 0;
 258 }