 /************************************************************************/
 /*                                                                      */
 /*                Centre for Speech Technology Research                 */
 /*                     University of Edinburgh, UK                      */
 /*                       Copyright (c) 1996,1997                        */
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 /*   1. The code must retain the above copyright notice, this list of   */
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 /*                                                                      */
 /************************************************************************/
 /*                 Author: Richard Caley (rjc@cstr.ed.ac.uk)            */
 /*                   Date: Wed Apr  9 1997                              */
 /************************************************************************/
 /*                                                                      */
 /* Allocation routines which check for errors.                          */
 /*                                                                      */
 /************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include "EST_unix.h"
#include <string.h>
#include "EST_cutils.h"

void *safe_walloc(int size)
{
    char *p;
    
    if (size == 0)
	/* Some mallocs return NULL for size 0, which means you can't tell
	   if it failed or not. So we'll avoid that problem by never 
	   asking for 0 bytes */
	p = calloc(1,1);
    else
	p = calloc(size,1);

    if (p == NULL)
    {
	fprintf(stderr,"WALLOC: failed to malloc %d bytes\n",size);
	exit(-1);  /* I'd rather not do this but this is the only safe */
	           /* thing to do */
    }

    return p;
}

void *safe_wrealloc(void *ptr, int size)
{
    char *p;

    if (ptr == 0)
	p = safe_walloc(size);
    else if (size == 0)
	/* Some mallocs return NULL for size 0, which means you can't tell
	   if it failed or not. So we'll avoid that problem by never 
	   asking for 0 bytes */
	p = realloc(ptr, 1);
    else
	p = realloc(ptr, size);

    if ((p == NULL) && (size != 0))
    {
	fprintf(stderr,"WREALLOC: failed to malloc %d bytes\n",size);
	exit(-1);  /* I'd rather not do this but this is the only safe */
	           /* thing to do */
    }

    return p;
}

void *safe_wcalloc(int size)
{
    char *p = safe_walloc(size);

    memset(p,0,size);

    return p;
}

char *wstrdup(const char *s)
{
    char *t = walloc(char,strlen(s)+1);
    strcpy(t,s);
    return t;
}

void wfree(void *p)
{
    if (p != NULL)
	free(p);
}

