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110 lines
1.7 KiB
C
110 lines
1.7 KiB
C
/* common.c - Common functions */
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/* Written 1993 by Werner Almesberger */
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/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
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* by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <errno.h>
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#include "common.h"
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typedef struct _link {
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void *data;
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struct _link *next;
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} LINK;
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void die(char *msg,...)
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{
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va_list args;
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va_start(args,msg);
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vfprintf(stderr,msg,args);
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va_end(args);
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fprintf(stderr,"\n");
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exit(1);
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}
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void pdie(char *msg,...)
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{
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va_list args;
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va_start(args,msg);
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vfprintf(stderr,msg,args);
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va_end(args);
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fprintf(stderr,":%s\n",strerror(errno));
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exit(1);
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}
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void *alloc(int size)
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{
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void *this;
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if ((this = malloc(size))) return this;
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pdie("malloc");
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return NULL; /* for GCC */
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}
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void *qalloc(void **root,int size)
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{
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LINK *link;
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link = alloc(sizeof(LINK));
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link->next = *root;
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*root = link;
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return link->data = alloc(size);
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}
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void qfree(void **root)
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{
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LINK *this;
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while (*root) {
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this = (LINK *) *root;
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*root = this->next;
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free(this->data);
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free(this);
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}
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}
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#ifdef min
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#undef min
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#endif
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int min(int a,int b)
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{
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return a < b ? a : b;
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}
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char get_key(char *valid,char *prompt)
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{
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int ch,okay;
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while (1) {
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if (prompt) printf("%s ",prompt);
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fflush(stdout);
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while (ch = getchar(), ch == ' ' || ch == '\t');
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if (ch == EOF) exit(1);
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if (!strchr(valid,okay = ch)) okay = 0;
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while (ch = getchar(), ch != '\n' && ch != EOF);
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if (ch == EOF) exit(1);
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if (okay) return okay;
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printf("Invalid input.\n");
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}
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}
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/* Local Variables: */
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/* tab-width: 8 */
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/* End: */
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