mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-25 04:06:18 +00:00
43 lines
795 B
C
43 lines
795 B
C
/* gcc -O3 -o crc32 crc32.c -lz */
|
|
|
|
#include <stdio.h>
|
|
#include <zlib.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
int main(int argc, const char* argv[])
|
|
{
|
|
if (argc != 2 )
|
|
{
|
|
fprintf( stderr, "Usage: crc32 <filename>\n" );
|
|
return 1;
|
|
}
|
|
|
|
FILE *file = fopen(argv[1], "rb");
|
|
|
|
if (file)
|
|
{
|
|
uLong crc = crc32(0L, Z_NULL, 0 );
|
|
|
|
for (;;)
|
|
{
|
|
Bytef buffer[16384];
|
|
|
|
int numread = fread((void*)buffer, 1, sizeof(buffer), file);
|
|
|
|
if (numread > 0)
|
|
crc = crc32( crc, buffer, numread );
|
|
else
|
|
break;
|
|
}
|
|
|
|
fclose(file);
|
|
|
|
printf("%08x\n", crc);
|
|
return 0;
|
|
}
|
|
|
|
fprintf(stderr, "Error opening input file: %s\n", strerror(errno));
|
|
return 1;
|
|
}
|