test/crc.h

   1 #define MAIN(x) crc##x
   2 #include "test.h"
   3 #include "a/crc.h"
   4 #if !defined __cplusplus
   5 #define WRITE_TABLE(bit, row, fmt)                                                  \
   6     static void write_table##bit(FILE *out, a_u##bit ctx[0x100], char const *label) \
   7     {                                                                               \
   8         (void)fprintf(out, "uint%i_t const %s[0x%X] = {\n", bit, label, 0x100);     \
   9         (void)fprintf(out, "    /* clang-format off */\n");                         \
  10         for (a_size i = 0; i != 0x100 / (row); ++i)                                 \
  11         {                                                                           \
  12             (void)fprintf(out, "    ");                                             \
  13             for (a_size j = 0; j != (row); ++j)                                     \
  14             {                                                                       \
  15                 (void)fprintf(out, "0x%0" #fmt PRIX##bit ",", ctx[(row) * i + j]);  \
  16                 if (j != (row) - 1) { (void)fputc(' ', out); }                      \
  17             }                                                                       \
  18             (void)fputc('\n', out);                                                 \
  19         }                                                                           \
  20         (void)fprintf(out, "    /* clang-format on */\n");                          \
  21         (void)fprintf(out, "};\n");                                                 \
  22     }
  23 WRITE_TABLE(8, 8, 2)
  24 WRITE_TABLE(16, 8, 4)
  25 WRITE_TABLE(32, 8, 8)
  26 WRITE_TABLE(64, 4, 16)
  27 static void create_table(FILE *out)
  28 {
  29     (void)fprintf(out, "#include <stdint.h>\n");
  30
  31     a_u8 table8[0x100];
  32     a_crc8m_init(table8, 0x07);
  33     write_table8(out, table8, "CRC8M");
  34     a_crc8l_init(table8, 0x07); // 0xE0
  35     write_table8(out, table8, "CRC8L");
  36
  37     a_u16 table16[0x100];
  38     a_crc16m_init(table16, 0x8005);
  39     write_table16(out, table16, "CRC16M");
  40     a_crc16l_init(table16, 0x8005); // 0xA001
  41     write_table16(out, table16, "CRC16L");
  42
  43     a_u32 table32[0x100];
  44     a_crc32m_init(table32, 0x04C11DB7);
  45     write_table32(out, table32, "CRC32M");
  46     a_crc32l_init(table32, 0x04C11DB7); // 0xEDB88320
  47     write_table32(out, table32, "CRC32L");
  48
  49     a_u64 table64[0x100];
  50     a_crc64m_init(table64, 0x42F0E1EBA9EA3693);
  51     write_table64(out, table64, "CRC64M");
  52     a_crc64l_init(table64, 0x42F0E1EBA9EA3693); // 0xC96C5795D7870F42
  53     write_table64(out, table64, "CRC64L");
  54
  55     (void)fflush(out);
  56 }
  57 #endif /* __cplusplus */
  58
  59 static void test(void)
  60 {
  61 #define TEXT "0123456789"
  62 #define SIZE (sizeof(TEXT) - 1)
  63
  64     a_u8 table8[0x100];
  65     a_crc8m_init(table8, A_U8_C(0x07));
  66     TEST_BUG(a_crc8(table8, TEXT, SIZE, 0) == A_U8_C(0x45));
  67     a_crc8l_init(table8, A_U8_C(0x31)); // 0x8C
  68     TEST_BUG(a_crc8(table8, TEXT, SIZE, 0) == A_U8_C(0x75));
  69
  70     a_u16 table16[0x100];
  71     a_crc16m_init(table16, A_U16_C(0x1021));
  72     TEST_BUG(a_crc16m(table16, TEXT, SIZE, 0) == A_U16_C(0x9C58));
  73     a_crc16l_init(table16, A_U16_C(0x8005)); // 0xA001
  74     TEST_BUG(a_crc16l(table16, TEXT, SIZE, 0) == A_U16_C(0x443D));
  75
  76     a_u32 table32[0x100];
  77     a_crc32m_init(table32, A_U32_C(0x1EDC6F41));
  78     TEST_BUG(a_crc32m(table32, TEXT, SIZE, 0) == A_U32_C(0x512B456E));
  79     a_crc32l_init(table32, A_U32_C(0x04C11DB7)); // 0xEDB88320
  80     TEST_BUG(a_crc32l(table32, TEXT, SIZE, 0) == A_U32_C(0x450EAFB0));
  81
  82     a_u64 table64[0x100];
  83     a_crc64m_init(table64, A_U64_C(0x000000000000001B));
  84     TEST_BUG(a_crc64m(table64, TEXT, SIZE, 0) == A_U64_C(0xE4FFBEA588AFC790));
  85     a_crc64l_init(table64, A_U64_C(0x42F0E1EBA9EA3693)); // 0xC96C5795D7870F42
  86     TEST_BUG(a_crc64l(table64, TEXT, SIZE, 0) == A_U64_C(0xDA60676A5CDE0008));
  87
  88 #undef TEXT
  89 #undef SIZE
  90 }
  91
  92 int main(int argc, char *argv[]) // NOLINT(misc-definitions-in-headers)
  93 {
  94 #if !defined __cplusplus
  95     FILE *out = stdout;
  96     if (argc > 1)
  97     {
  98         char const *name = argv[argc - 1];
  99         int file = a_cast_s(int, *name);
 100         if (file)
 101         {
 102             out = fopen(name, "wb");
 103             if (!out)
 104             {
 105                 perror(name);
 106                 exit(EXIT_FAILURE);
 107             }
 108         }
 109         create_table(out);
 110         if (file && fclose(out) == EOF)
 111         {
 112             perror(name);
 113         }
 114     }
 115 #else /* !__cplusplus */
 116     (void)argc;
 117     (void)argv;
 118 #endif /* __cplusplus */
 119     test();
 120     return 0;
 121 }