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Adding error.c/.h

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Henrik Hautakoski 2011-08-04 11:07:57 +02:00
parent 692cdc16dd
commit 6bc3ffde5d
2 changed files with 99 additions and 0 deletions
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/* error.c - Error handling helper routines
*
* Copyright (C) 2011 Henrik Hautakoski <henrik@fiktivkod.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "error.h"
static void print_e(FILE *fd, const char *prefix, const char *fmt, va_list va) {
static char msg[4096];
vsnprintf(msg, sizeof(msg), fmt, va);
fprintf(fd, "%s: %s\n", prefix, msg);
}
void usage(const char *msg, ...) {
va_list vl;
va_start(vl, msg);
print_e(stdout, "usage", msg, vl);
va_end(vl);
exit(EXIT_FAILURE);
}
void warn(const char *msg, ...) {
va_list vl;
va_start(vl, msg);
print_e(stderr, "warning", msg, vl);
va_end(vl);
}
void fatal(const char *msg, ...) {
va_list vl;
va_start(vl, msg);
print_e(stderr, "fatal", msg, vl);
va_end(vl);
exit(EXIT_FAILURE);
}
int error(const char *msg, ...) {
va_list vl;
va_start(vl, msg);
print_e(stderr, "error", msg, vl);
va_end(vl);
return -1;
}