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/* Copyright (C) 2001-2019 Peter Selinger.
This file is part of Potrace. It is free software and it is covered
by the GNU General Public License. See the file COPYING for details. */
/* Check whether a text file uses CR or CRLF style line endings, by
checking the first line only. Return 1 if the first line ends in CR
or CRLF, and 0 otherwise. Return 2 on error. */
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "../src/platform.h"
int checkbin(FILE *f) {
int c;
while (1) {
c = fgetc(f);
if (c == EOF) {
return 0;
} else if (c == '\n') {
return 0;
} else if (c == '\r') {
return 1;
}
}
}
int main(int ac, char **av) {
char *file;
FILE *f;
int r;
platform_init();
if (ac != 2) {
fprintf(stderr, "checkbin: wrong number of arguments\n");
fprintf(stderr, "Usage: checkbin file\n");
return 2;
}
file = av[1];
if (strcmp(file, "-") == 0) {
f = stdin;
} else {
f = fopen(file, "rb");
if (!f) {
fprintf(stderr, "checkbin: %s: %s\n", file, strerror(errno));
return 2;
}
}
r = checkbin(f);
if (strcmp(file, "-") == 0) {
/* nothing */
} else {
fclose(f);
}
return r;
}
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