1 /* common.c - Common functions
2
3 Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
4 Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
5
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18
19 On Debian systems, the complete text of the GNU General Public License
20 can be found in /usr/share/common-licenses/GPL-3 file.
21 */
22
23 /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
24 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
25
26
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <string.h>
30 #include <stdarg.h>
31 #include <errno.h>
32
33 #include "common.h"
34
35
36 typedef struct _link {
37 void *data;
38 struct _link *next;
39 } LINK;
40
41
die(char * msg,...)42 void die(char *msg,...)
43 {
44 va_list args;
45
46 va_start(args,msg);
47 vfprintf(stderr,msg,args);
48 va_end(args);
49 fprintf(stderr,"\n");
50 exit(1);
51 }
52
53
pdie(char * msg,...)54 void pdie(char *msg,...)
55 {
56 va_list args;
57
58 va_start(args,msg);
59 vfprintf(stderr,msg,args);
60 va_end(args);
61 fprintf(stderr,":%s\n",strerror(errno));
62 exit(1);
63 }
64
65
alloc(int size)66 void *alloc(int size)
67 {
68 void *this;
69
70 if ((this = malloc(size))) return this;
71 pdie("malloc");
72 return NULL; /* for GCC */
73 }
74
75
qalloc(void ** root,int size)76 void *qalloc(void **root,int size)
77 {
78 LINK *link;
79
80 link = alloc(sizeof(LINK));
81 link->next = *root;
82 *root = link;
83 return link->data = alloc(size);
84 }
85
86
qfree(void ** root)87 void qfree(void **root)
88 {
89 LINK *this;
90
91 while (*root) {
92 this = (LINK *) *root;
93 *root = this->next;
94 free(this->data);
95 free(this);
96 }
97 }
98
99
min(int a,int b)100 int min(int a,int b)
101 {
102 return a < b ? a : b;
103 }
104
105
get_key(char * valid,char * prompt)106 char get_key(char *valid,char *prompt)
107 {
108 int ch,okay;
109
110 while (1) {
111 if (prompt) printf("%s ",prompt);
112 fflush(stdout);
113 while (ch = getchar(), ch == ' ' || ch == '\t');
114 if (ch == EOF) exit(1);
115 if (!strchr(valid,okay = ch)) okay = 0;
116 while (ch = getchar(), ch != '\n' && ch != EOF);
117 if (ch == EOF) exit(1);
118 if (okay) return okay;
119 printf("Invalid input.\n");
120 }
121 }
122
123 /* Local Variables: */
124 /* tab-width: 8 */
125 /* End: */
126