/*
 * Mach Operating System
 * Copyright (c) 1991 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 * Character subroutines
 */

#include <stdarg.h>

#define	EXPORT_BOOLEAN
#include <mach/boolean.h>

/*
 * Concatenate a group of strings together into a buffer.
 * Return a pointer to the trailing '\0' character in
 * the result string.
 * The list of strings ends with a '(char *)0'.
 */
/*VARARGS1*/
char *
strbuild(char *dest, ...)
{
	va_list	argptr;
	register char *	src;
	register int	c;

	va_start(argptr, dest);
	while ((src = va_arg(argptr, char *)) != (char *)0) {

	    while ((c = *src++) != '\0')
		*dest++ = c;
	}
	*dest = '\0';
	va_end(argptr);
	return (dest);
}

/*
 * Return TRUE if string 2 is a prefix of string 1.
 */
boolean_t
strprefix(s1, s2)
	register char *s1, *s2;
{
	register int	c;

	while ((c = *s2++) != '\0') {
	    if (c != *s1++)
		return (FALSE);
	}
	return (TRUE);
}