rosapps/sysutils/dosfsck/common.c

   1 /* common.c  -  Common functions */
   2
   3 /* Written 1993 by Werner Almesberger */
   4
   5 /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
   6  * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
   7
   8
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <stdarg.h>
  13 #include <errno.h>
  14
  15 #include "common.h"
  16
  17
  18 typedef struct _link {
  19     void *data;
  20     struct _link *next;
  21 } LINK;
  22
  23
  24 void die(char *msg,...)
  25 {
  26     va_list args;
  27
  28     va_start(args,msg);
  29     vfprintf(stderr,msg,args);
  30     va_end(args);
  31     fprintf(stderr,"\n");
  32     exit(1);
  33 }
  34
  35
  36 void pdie(char *msg,...)
  37 {
  38     va_list args;
  39
  40     va_start(args,msg);
  41     vfprintf(stderr,msg,args);
  42     va_end(args);
  43     fprintf(stderr,":%s\n",strerror(errno));
  44     exit(1);
  45 }
  46
  47
  48 void *alloc(int size)
  49 {
  50     void *this;
  51
  52     if ((this = malloc(size))) return this;
  53     pdie("malloc");
  54     return NULL; /* for GCC */
  55 }
  56
  57
  58 void *qalloc(void **root,int size)
  59 {
  60     LINK *link;
  61
  62     link = alloc(sizeof(LINK));
  63     link->next = *root;
  64     *root = link;
  65     return link->data = alloc(size);
  66 }
  67
  68
  69 void qfree(void **root)
  70 {
  71     LINK *this;
  72
  73     while (*root) {
  74         this = (LINK *) *root;
  75         *root = this->next;
  76         free(this->data);
  77         free(this);
  78     }
  79 }
  80
  81
  82 #ifdef min
  83 #undef min
  84 #endif
  85 int min(int a,int b)
  86 {
  87     return a < b ? a : b;
  88 }
  89
  90
  91 char get_key(char *valid,char *prompt)
  92 {
  93     int ch,okay;
  94
  95     while (1) {
  96         if (prompt) printf("%s ",prompt);
  97         fflush(stdout);
  98         while (ch = getchar(), ch == ' ' || ch == '\t');
  99         if (ch == EOF) exit(1);
 100         if (!strchr(valid,okay = ch)) okay = 0;
 101         while (ch = getchar(), ch != '\n' && ch != EOF);
 102         if (ch == EOF) exit(1);
 103         if (okay) return okay;
 104         printf("Invalid input.\n");
 105     }
 106 }
 107
 108 /* Local Variables: */
 109 /* tab-width: 8     */
 110 /* End:             */