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calc_crc32.c
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/*
* Copyright 2015 Andreas Oberritter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include "crc32.h"
int main(int argc, char *argv[])
{
int fd;
struct stat st;
void *m;
assert(argc == 2);
fd = open(argv[1], O_RDONLY);
assert(fd >= 0);
assert(fstat(fd, &st) == 0);
m = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
assert(m != MAP_FAILED);
printf("B: CRC32_BE(0) = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_BE, 0, m, st.st_size));
printf("B: CRC32_BE(~0) = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_BE, ~0, m, st.st_size));
printf("B: CRC32_LE(0) = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_LE, 0, m, st.st_size));
printf("B: CRC32_LE(~0) = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_LE, ~0, m, st.st_size));
printf("B: CRC32C_LE(0) = 0x%08x\n", crc32(CRC32_BE, CRC32C_POLY_LE, 0, m, st.st_size));
printf("B: CRC32C_LE(~0) = 0x%08x\n", crc32(CRC32_BE, CRC32C_POLY_LE, ~0, m, st.st_size));
printf("L: CRC32_BE(0) = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_BE, 0, m, st.st_size));
printf("L: CRC32_BE(~0) = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_BE, ~0, m, st.st_size));
printf("L: CRC32_LE(0) = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_LE, 0, m, st.st_size));
printf("L: CRC32_LE(~0) = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_LE, ~0, m, st.st_size));
printf("L: CRC32C_LE(0) = 0x%08x\n", crc32(CRC32_LE, CRC32C_POLY_LE, 0, m, st.st_size));
printf("L: CRC32C_LE(~0) = 0x%08x\n", crc32(CRC32_LE, CRC32C_POLY_LE, ~0, m, st.st_size));
printf("B: CRC32_BE(0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_BE, 0, m, st.st_size) ^ ~0);
printf("B: CRC32_BE(~0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_BE, ~0, m, st.st_size) ^ ~0);
printf("B: CRC32_LE(0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_LE, 0, m, st.st_size) ^ ~0);
printf("B: CRC32_LE(~0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32_POLY_LE, ~0, m, st.st_size) ^ ~0);
printf("B: CRC32C_LE(0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32C_POLY_LE, 0, m, st.st_size) ^ ~0);
printf("B: CRC32C_LE(~0)^~0 = 0x%08x\n", crc32(CRC32_BE, CRC32C_POLY_LE, ~0, m, st.st_size) ^ ~0);
printf("L: CRC32_BE(0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_BE, 0, m, st.st_size) ^ ~0);
printf("L: CRC32_BE(~0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_BE, ~0, m, st.st_size) ^ ~0);
printf("L: CRC32_LE(0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_LE, 0, m, st.st_size) ^ ~0);
printf("L: CRC32_LE(~0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32_POLY_LE, ~0, m, st.st_size) ^ ~0);
printf("L: CRC32C_LE(0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32C_POLY_LE, 0, m, st.st_size) ^ ~0);
printf("L: CRC32C_LE(~0)^~0 = 0x%08x\n", crc32(CRC32_LE, CRC32C_POLY_LE, ~0, m, st.st_size) ^ ~0);
munmap(m, st.st_size);
close(fd);
return 0;
}