path: root/src/liblzma/check/crc32_tablegen.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       crc32_tablegen.c
/// \brief      Generates CRC32 crc32_table.c
///
/// Compiling: gcc -std=c99 -o crc32_tablegen crc32_tablegen.c crc32_init.c
/// Add -DWORDS_BIGENDIAN to generate big endian table.
//
//  This code has been put into the public domain.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//
///////////////////////////////////////////////////////////////////////////////

#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>


extern void lzma_crc32_init(void);

extern uint32_t lzma_crc32_table[8][256];


int
main()
{
	lzma_crc32_init();

	printf("/* This file has been automatically generated by "
			"crc32_tablegen.c. */\n\n"
			"#include <inttypes.h>\n\n"
			"const uint32_t lzma_crc32_table[8][256] = {\n\t{");

	for (size_t s = 0; s < 8; ++s) {
		for (size_t b = 0; b < 256; ++b) {
			if ((b % 4) == 0)
				printf("\n\t\t");

			printf("0x%08" PRIX32, lzma_crc32_table[s][b]);

			if (b != 255)
				printf(", ");
		}

		if (s == 7)
			printf("\n\t}\n};\n");
		else
			printf("\n\t}, {");
	}

	return 0;
}