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/* common.c - Common functions */
/* Written 1993 by Werner Almesberger */
/* 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");
}
}
/* Local Variables: */
/* tab-width: 8 */
/* End: */
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