1 ///////////////////////////////////////////////////////////////////////////////
3 /// \file fastpos_tablegen.c
4 /// \brief Generates the lzma_fastpos[] lookup table
6 // Authors: Igor Pavlov
9 // This file has been put into the public domain.
10 // You can do whatever you want with this file.
12 ///////////////////////////////////////////////////////////////////////////////
22 uint8_t fastpos[1 << FASTPOS_BITS];
24 const uint8_t fast_slots = 2 * FASTPOS_BITS;
30 for (uint8_t slot_fast = 2; slot_fast < fast_slots; ++slot_fast) {
31 const uint32_t k = 1 << ((slot_fast >> 1) - 1);
32 for (uint32_t j = 0; j < k; ++j, ++c)
33 fastpos[c] = slot_fast;
36 printf("/* This file has been automatically generated "
37 "by fastpos_tablegen.c. */\n\n"
38 "#include \"common.h\"\n"
39 "#include \"fastpos.h\"\n\n"
40 "const uint8_t lzma_fastpos[1 << FASTPOS_BITS] = {");
42 for (size_t i = 0; i < (1 << FASTPOS_BITS); ++i) {
46 printf("%3u", (unsigned int)(fastpos[i]));
48 if (i != (1 << FASTPOS_BITS) - 1)