/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1992, 1997 NeXT Software, Inc. All rights reserved. * * File: libc/gen/ppc/strncpy.c * * This file contains machine dependent code for string copy * * HISTORY * 24-Jan-1997 Umesh Vaishampayan (umeshv@NeXT.com) * Ported to PPC. * 24-Nov-92 Derek B Clegg (dclegg@next.com) * Created. */ #import <string.h> /* This routine should be optimized. */ /* ANSI sez: * The `strncpy' function copies not more than `n' characters (characters * that follow a null character are not copied) from the array pointed to * by `s2' to the array pointed to by `s1'. If copying takes place between * objects that overlap, the behavior is undefined. * If the array pointed to by `s2' is a string that is shorter than `n' * characters, null characters are appended to the copy in the array * pointed to by `s1', until `n' characters in all have been written. * The `strncpy' function returns the value of `s1'. [4.11.2.4] */ char * strncpy(char *s1, const char *s2, size_t n) { char *s = s1; while (n > 0 && *s2 != '\0') { *s++ = *s2++; --n; } while (n > 0) { *s++ = '\0'; --n; } return s1; }