#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define fatal(...) return NULL;
void *
xmalloc(size_t size)
{
void *ptr = malloc(size);
if (ptr == NULL)
fatal("xmalloc: out of memory (allocating %d bytes)", (int) size);
return ptr;
}
void *
xrealloc(void *ptr, size_t new_size)
{
void *new_ptr;
if (ptr == NULL)
fatal("xrealloc: NULL pointer given as argument");
new_ptr = realloc(ptr, new_size);
if (new_ptr == NULL)
fatal("xrealloc: out of memory (new_size %d bytes)", (int) new_size);
return new_ptr;
}
void
xfree(void *ptr)
{
if (ptr == NULL) {
return;
}
free(ptr);
}
char *
xstrdup(const char *str)
{
int len = strlen(str) + 1;
char *cp = xmalloc(len);
strlcpy(cp, str, len);
return cp;
}