#include <stdlib.h>#include <stdio.h>#include <inttypes.h>#include <stdarg.h>#include <ctype.h>#include <string.h>#include <assert.h> #include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <unistd.h> #include "util.h" /* Some systems don't have strndup. *//* malloc wrappers */void *zalloc(size_t sz){	void *mem; 	mem = calloc(1, sz);	if (!mem && sz)		die("Out of memory");	return mem;} void *xalloc(size_t sz){	void *mem; 	mem = malloc(sz);	if (!mem && sz)		die("Out of memory");	return mem;} void *zrealloc(void *mem, size_t oldsz, size_t sz){	char *p; 	p = xrealloc(mem, sz);	if (sz > oldsz)		memset(&p[oldsz], 0, sz - oldsz);	return p;} void *xrealloc(void *mem, size_t sz){	mem = realloc(mem, sz);	if (!mem && sz)		die("Out of memory");	return mem;} /* lists */voidlappend(void *l, size_t *len, void *n){	void ***pl; 	pl = l;	*pl = xrealloc(*pl, (*len + 1) * sizeof(void *));	(*pl)[*len] = n;	(*len)++;} void *lpop(void *l, size_t *len){	void ***pl;	void *v; 	pl = l;	(*len)--;	v = (*pl)[*len];	*pl = xrealloc(*pl, *len * sizeof(void *));	return v;} voidlinsert(void *p, size_t *len, size_t idx, void *v){	void ***pl, **l; 	pl = p;	*pl = xrealloc(*pl, (*len + 1) * sizeof(void *));	l = *pl; 	memmove(&l[idx + 1], &l[idx], (*len - idx) * sizeof(void *));	l[idx] = v;	(*len)++;} voidldel(void *p, size_t *len, size_t idx){	void ***pl, **l; 	assert(p != NULL);	assert(idx < *len);	pl = p;	l = *pl;	memmove(&l[idx], &l[idx + 1], (*len - idx - 1) * sizeof(void *));	(*len)--;	*pl = xrealloc(l, *len * sizeof(void *));} voidlcat(void *dst, size_t *ndst, void *src, size_t nsrc){	size_t i;	void ***d, **s; 	d = dst;	s = src;	for (i = 0; i < nsrc; i++)		lappend(d, ndst, s[i]);} voidlfree(void *l, size_t *len){	void ***pl; 	assert(l != NULL);	pl = l;	free(*pl);	*pl = NULL;	*len = 0;} void *memdup(void *mem, size_t len){	void *ret;         if (!mem)            return NULL;	ret = xalloc(len);	return memcpy(ret, mem, len);}