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/* Copyright (C) 2024 Aiden Gall
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 3 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, see <http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void warn(const char *fmt, ...);
void die(const char *fmt, ...);
void efwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
long argtonum(const char *arg, long minval, long maxval);
void
warn(const char *const fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
void
die(const char *const fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
efwrite(const void *const ptr, const size_t size, const size_t nmemb,
FILE *const stream)
{
if (fwrite(ptr, size, nmemb, stream) != nmemb)
die("fwrite: Write failed\n");
}
long
argtonum(const char *const arg, const long minval, const long maxval)
{
long ret;
char *endptr;
if (minval > maxval)
die("argtonum: Invalid range\n");
if (!arg)
die("argtonum: Missing argument\n");
errno = 0;
ret = strtol(arg, &endptr, 10);
if (errno)
die("strtol: %s\n", strerror(errno));
if (arg == endptr || *endptr)
die("strtol: Invalid integer\n");
if (ret < minval || ret > maxval)
die("argtonum: Argument out of range\n");
return ret;
}
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