projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
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 | /* Copyright (c) 1992, 1997 NeXT Software, Inc. All rights reserved. | |
| 23 | * | |
| 24 | * File: libc/gen/ppc/strncpy.c | |
| 25 | * | |
| 26 | * This file contains machine dependent code for string copy | |
| 27 | * | |
| 28 | * HISTORY | |
| 29 | * 24-Jan-1997 Umesh Vaishampayan (umeshv@NeXT.com) | |
| 30 | * Ported to PPC. | |
| 31 | * 24-Nov-92 Derek B Clegg (dclegg@next.com) | |
| 32 | * Created. | |
| 33 | */ | |
| 34 | #import <string.h> | |
| 35 | ||
| 36 | /* This routine should be optimized. */ | |
| 37 | ||
| 38 | /* ANSI sez: | |
| 39 | * The `strncpy' function copies not more than `n' characters (characters | |
| 40 | * that follow a null character are not copied) from the array pointed to | |
| 41 | * by `s2' to the array pointed to by `s1'. If copying takes place between | |
| 42 | * objects that overlap, the behavior is undefined. | |
| 43 | * If the array pointed to by `s2' is a string that is shorter than `n' | |
| 44 | * characters, null characters are appended to the copy in the array | |
| 45 | * pointed to by `s1', until `n' characters in all have been written. | |
| 46 | * The `strncpy' function returns the value of `s1'. [4.11.2.4] | |
| 47 | */ | |
| 48 | char * | |
| 49 | strncpy(char *s1, const char *s2, size_t n) | |
| 50 | { | |
| 51 | char *s = s1; | |
| 52 | while (n > 0 && *s2 != '\0') { | |
| 53 | *s++ = *s2++; | |
| 54 | --n; | |
| 55 | } | |
| 56 | while (n > 0) { | |
| 57 | *s++ = '\0'; | |
| 58 | --n; | |
| 59 | } | |
| 60 | return s1; | |
| 61 | } |