ref: 19aa3a5d4b1a24c747826c6aeb3acaa5673d03b3
dir: /malloc.c/
/*
* malloc.c: safe wrappers around malloc, realloc, free, strdup
*/
#include <stdlib.h>
#include <string.h>
#include "puzzles.h"
/*
* smalloc should guarantee to return a useful pointer - Halibut
* can do nothing except die when it's out of memory anyway.
*/
void *smalloc(size_t size) {
void *p;
p = malloc(size);
if (!p)
fatal("out of memory");
return p;
}
/*
* sfree should guaranteeably deal gracefully with freeing NULL
*/
void sfree(void *p) {
if (p) {
free(p);
}
}
/*
* srealloc should guaranteeably be able to realloc NULL
*/
void *srealloc(void *p, size_t size) {
void *q;
if (p) {
q = realloc(p, size);
} else {
q = malloc(size);
}
if (!q)
fatal("out of memory");
return q;
}
/*
* dupstr is like strdup, but with the never-return-NULL property
* of smalloc (and also reliably defined in all environments :-)
*/
char *dupstr(const char *s) {
char *r = smalloc(1+strlen(s));
strcpy(r,s);
return r;
}