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44 lines
804 B
C
44 lines
804 B
C
/* gcc -O3 -o crc32 crc32.c -lz */
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <compat/zlib.h>
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int main(int argc, const char* argv[])
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{
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if (argc != 2 )
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{
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fprintf( stderr, "Usage: crc32 <filename>\n" );
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return 1;
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}
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FILE *file = fopen(argv[1], "rb");
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if (file)
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{
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uLong crc = crc32(0L, Z_NULL, 0 );
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for (;;)
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{
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Bytef buffer[16384];
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int numread = fread((void*)buffer, 1, sizeof(buffer), file);
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if (numread > 0)
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crc = crc32( crc, buffer, numread );
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else
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break;
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}
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fclose(file);
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printf("%08x\n", crc);
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return 0;
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}
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fprintf(stderr, "Error opening input file: %s\n", strerror(errno));
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return 1;
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}
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