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Commit	Line	Data
	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Mach Operating System
	24	* Copyright (c) 1991,1990,1989 Carnegie Mellon University
	25	* All Rights Reserved.
	26	*
	27	* Permission to use, copy, modify and distribute this software and its
	28	* documentation is hereby granted, provided that both the copyright
	29	* notice and this permission notice appear in all copies of the
	30	* software, derivative works or modified versions, and any portions
	31	* thereof, and that both notices appear in supporting documentation.
	32	*
	33	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	34	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	35	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	36	*
	37	* Carnegie Mellon requests users of this software to return to
	38	*
	39	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	40	* School of Computer Science
	41	* Carnegie Mellon University
	42	* Pittsburgh PA 15213-3890
	43	*
	44	* any improvements or extensions that they make and grant Carnegie Mellon
	45	* the rights to redistribute these changes.
	46	*/
	47	/*
	48	* mig_strncpy.c - by Joshua Block
	49	*
	50	* mig_strncpy -- Bounded string copy. Does what the library routine strncpy
	51	* OUGHT to do: Copies the (null terminated) string in src into dest, a
	52	* buffer of length len. Assures that the copy is still null terminated
	53	* and doesn't overflow the buffer, truncating the copy if necessary.
	54	*
	55	* Parameters:
	56	*
	57	* dest - Pointer to destination buffer.
	58	*
	59	* src - Pointer to source string.
	60	*
	61	* len - Length of destination buffer.
	62	*
	63	* Result:
	64	* length of string copied, INCLUDING the trailing 0.
	65	*/
	66	#include <mach/mig_errors.h>
	67
	68	int
	69	mig_strncpy(
	70	register char *dest,
	71	register const char *src,
	72	register int len)
	73	{
	74	register int i;
	75
	76	if (len <= 0)
	77	return 0;
	78
	79	for (i=1; i<len; i++)
	80	if (! (dest++ = src++))
	81	return i;
	82
	83	*dest = '\0';
	84	return i;
	85	}