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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _XOPEN_SOURCE 700
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/* G(x)=x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1 */
const uint64_t polynomial = UINT64_C(0x104C11DB7);
int cksum(const char *path)
{
uint64_t checksum = 0;
intmax_t octets = 0;
FILE *f = stdin;
if (path && strcmp(path, "-")) {
f = fopen(path, "rb");
}
if (f == NULL) {
return 1;
}
while (!feof(f)) {
uint64_t next = 0;
octets += fread(&next, sizeof(next), 1, f);
checksum ^= next;
}
if (f != stdin) {
fclose(f);
}
printf("%"PRIu64" %"PRIdMAX" %s\n", checksum, octets, path);
return 0;
}
int main(int argc, char *argv[])
{
while (getopt(argc, argv, "") != -1) {
return 1;
}
int r = 0;
do {
r |= cksum(argv[optind++]);
} while (optind < argc);
return 0;
}
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