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/* common.h - Common functions */
/* Written 1993 by Werner Almesberger */
#ifndef _COMMON_H
#define _COMMON_H
void die(char *msg,...) __attribute((noreturn));
/* Displays a prinf-style message and terminates the program. */
void pdie(char *msg,...) __attribute((noreturn));
/* Like die, but appends an error message according to the state of errno. */
void *alloc(int size);
/* mallocs SIZE bytes and returns a pointer to the data. Terminates the program
if malloc fails. */
void *qalloc(void **root,int size);
/* Like alloc, but registers the data area in a list described by ROOT. */
void qfree(void **root);
/* Deallocates all qalloc'ed data areas described by ROOT. */
int min(int a,int b);
/* Returns the smaller integer value of a and b. */
char get_key(char *valid,char *prompt);
/* Displays PROMPT and waits for user input. Only characters in VALID are
accepted. Terminates the program on EOF. Returns the character. */
#endif
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