/*
 * malloc.c: safe wrappers around malloc, realloc, free, strdup
 */

#include <stdlib.h>
#include "buttress.h"

/*
 * smalloc should guarantee to return a useful pointer - buttress
 * can do nothing except die when it's out of memory anyway
 */
void *smalloc(int size) {
    void *p = malloc(size);
    if (!p)
	fatal(err_nomemory);
    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, int size) {
    void *q;
    if (p)
	q = realloc(p, size);
    else
	q = malloc(size);
    if (!q)
	fatal(err_nomemory);
    return q;
}

/*
 * Free a linked list of words
 */
void free_word_list(word *w) {
    word *t;
    while (w) {
	t = w;
	w = w->next;
	sfree(t);
    }
}

/*
 * Free a linked list of paragraphs
 */
void free_para_list(paragraph *p) {
    paragraph *t;
    while (p) {
	t = p;
	p = p->next;
	sfree(t);
    }
}