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///////////////////////////////////////////////////////////////////////////////
//
/// \file fastpos_tablegen.c
/// \brief Generates the lzma_fastpos[] lookup table
///
// Authors: Igor Pavlov
// Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include <inttypes.h>
#include <stdio.h>
#include "fastpos.h"
int
main(void)
{
uint8_t fastpos[1 << FASTPOS_BITS];
const uint8_t fast_slots = 2 * FASTPOS_BITS;
uint32_t c = 2;
fastpos[0] = 0;
fastpos[1] = 1;
for (uint8_t slot_fast = 2; slot_fast < fast_slots; ++slot_fast) {
const uint32_t k = 1 << ((slot_fast >> 1) - 1);
for (uint32_t j = 0; j < k; ++j, ++c)
fastpos[c] = slot_fast;
}
printf("/* This file has been automatically generated "
"by fastpos_tablegen.c. */\n\n"
"#include \"common.h\"\n"
"#include \"fastpos.h\"\n\n"
"const uint8_t lzma_fastpos[1 << FASTPOS_BITS] = {");
for (size_t i = 0; i < (1 << FASTPOS_BITS); ++i) {
if (i % 16 == 0)
printf("\n\t");
printf("%3u", (unsigned int)(fastpos[i]));
if (i != (1 << FASTPOS_BITS) - 1)
printf(",");
}
printf("\n};\n");
return 0;
}
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