| 1 | /* gcc -O3 -o crc32 crc32.c -lz */ |
| 2 | |
| 3 | #include <stdio.h> |
| 4 | #include <errno.h> |
| 5 | #include <string.h> |
| 6 | |
| 7 | #include <encodings/crc32.h> |
| 8 | |
| 9 | int main(int argc, const char* argv[]) |
| 10 | { |
| 11 | if (argc != 2 ) |
| 12 | { |
| 13 | fprintf( stderr, "Usage: crc32 <filename>\n" ); |
| 14 | return 1; |
| 15 | } |
| 16 | |
| 17 | FILE *file = fopen(argv[1], "rb"); |
| 18 | |
| 19 | if (file) |
| 20 | { |
| 21 | uint32_t crc = encoding_crc32(0L, NULL, 0 ); |
| 22 | |
| 23 | for (;;) |
| 24 | { |
| 25 | uint8_t buffer[16384]; |
| 26 | |
| 27 | int numread = fread((void*)buffer, 1, sizeof(buffer), file); |
| 28 | |
| 29 | if (numread > 0) |
| 30 | crc = encoding_crc32( crc, buffer, numread ); |
| 31 | else |
| 32 | break; |
| 33 | } |
| 34 | |
| 35 | fclose(file); |
| 36 | |
| 37 | printf("%08x\n", crc); |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | fprintf(stderr, "Error opening input file: %s\n", strerror(errno)); |
| 42 | return 1; |
| 43 | } |