src/liblzma/check/crc64_tablegen.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       crc64_tablegen.c
   4 /// \brief      Generates CRC64 crc64_table.c
   5 ///
   6 /// Compiling: gcc -std=c99 -o crc64_tablegen crc64_tablegen.c crc64_init.c
   7 /// Add -DWORDS_BIGENDIAN to generate big endian table.
   8 //
   9 //  This code has been put into the public domain.
  10 //
  11 //  This library is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14 //
  15 ///////////////////////////////////////////////////////////////////////////////
  16
  17 #include <sys/types.h>
  18 #include <inttypes.h>
  19 #include <stdio.h>
  20
  21
  22 extern void lzma_crc64_init(void);
  23
  24 extern uint64_t lzma_crc64_table[4][256];
  25
  26
  27 int
  28 main()
  29 {
  30         lzma_crc64_init();
  31
  32         printf("/* This file has been automatically generated by "
  33                         "crc64_tablegen.c. */\n\n"
  34                         "#include <inttypes.h>\n\n"
  35                         "const uint64_t lzma_crc64_table[4][256] = {\n\t{");
  36
  37         for (size_t s = 0; s < 4; ++s) {
  38                 for (size_t b = 0; b < 256; ++b) {
  39                         if ((b % 2) == 0)
  40                                 printf("\n\t\t");
  41
  42                         printf("UINT64_C(0x%016" PRIX64 ")",
  43                                         lzma_crc64_table[s][b]);
  44
  45                         if (b != 255)
  46                                 printf(", ");
  47                 }
  48
  49                 if (s == 3)
  50                         printf("\n\t}\n};\n");
  51                 else
  52                         printf("\n\t}, {");
  53         }
  54
  55         return 0;
  56 }