PTR
xmalloc (size_t size)
{
PTR newmem;
if (size == 0)
size = 1;
newmem = malloc (size);
if (!newmem)
xmalloc_failed (size);
return (newmem);
}
PTR
xcalloc (size_t nelem, size_t elsize)
{
PTR newmem;
if (nelem == 0 || elsize == 0)
nelem = elsize = 1;
newmem = calloc (nelem, elsize);
if (!newmem)
xmalloc_failed (nelem * elsize);
return (newmem);
}
PTR
xrealloc (PTR oldmem, size_t size)
{
PTR newmem;
if (size == 0)
size = 1;
if (!oldmem)
newmem = malloc (size);
else
newmem = realloc (oldmem, size);
if (!newmem)
xmalloc_failed (size);
return (newmem);
}
/*
* Change the size of an allocated block of memory P to N bytes,
* with error checking.
* If P is NULL, run xmalloc.
* If N is 0, run free and return NULL.
*/
void *
xrealloc(void *p, size_t n)
{
if (p == 0) {
return xmalloc(n);
}
if (n == 0) {
free(p);
return 0;
}
p = realloc(p, n);
if (p == 0) {
xmalloc_failed();
}
return p;
}
