/* estrdup.c -- duplicate a string, die if error
 * 
 * char	*string;
 * char	*newstring;
 * newstring = estrdup(string);
 * 
 * estrdup returns a copy of its argument, located in memory
 * allocated from the heap.  If it is unable to allocate the
 * necessary memory, estrdup executes error("no memory"). 
 * (Generally, the routine error is not expected to return,
 * but if it does, estrdup will return NULL.)
 */
#include <stdio.h>

char	*malloc();
int	strlen();

char *
estrdup(s)
char	*s;
{
    register char	*t;

    if (NULL == (t = malloc(strlen(s)+1))) {
	error("no memory");
	return(NULL);
    }
    strcpy(t, s);
    return(t);
}