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/* common.c - Common functions
Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
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/>.
On Debian systems, the complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL-3 file.
*/
/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
* by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include "common.h"
typedef struct _link {
void *data;
struct _link *next;
} LINK;
void die(char *msg, ...)
{
va_list args;
va_start(args, msg);
vfprintf(stderr, msg, args);
va_end(args);
fprintf(stderr, "\n");
exit(1);
}
void pdie(char *msg, ...)
{
va_list args;
va_start(args, msg);
vfprintf(stderr, msg, args);
va_end(args);
fprintf(stderr, ":%s\n", strerror(errno));
exit(1);
}
void *alloc(int size)
{
void *this;
if ((this = malloc(size)))
return this;
pdie("malloc");
return NULL; /* for GCC */
}
void *qalloc(void **root, int size)
{
LINK *link;
link = alloc(sizeof(LINK));
link->next = *root;
*root = link;
return link->data = alloc(size);
}
void qfree(void **root)
{
LINK *this;
while (*root) {
this = (LINK *) * root;
*root = this->next;
free(this->data);
free(this);
}
}
int min(int a, int b)
{
return a < b ? a : b;
}
char get_key(char *valid, char *prompt)
{
int ch, okay;
while (1) {
if (prompt)
printf("%s ", prompt);
fflush(stdout);
while (ch = getchar(), ch == ' ' || ch == '\t') ;
if (ch == EOF)
exit(1);
if (!strchr(valid, okay = ch))
okay = 0;
while (ch = getchar(), ch != '\n' && ch != EOF) ;
if (ch == EOF)
exit(1);
if (okay)
return okay;
printf("Invalid input.\n");
}
}
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