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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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