strcpy.c

来自「Netscape NSPR库源码」· C语言 代码 · 共 86 行

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

#include "plstr.h"

PR_IMPLEMENT(char *)
PL_strcpy(char *dest, const char *src)
{
    char *rv;
    
    if( (char *)0 == dest ) return (char *)0;
    if( (const char *)0 == src ) return (char *)0;

    for( rv = dest; ((*dest = *src) != 0); dest++, src++ )
        ;

    return rv;
}

PR_IMPLEMENT(char *)
PL_strncpy(char *dest, const char *src, PRUint32 max)
{
    char *rv;
    
    if( (char *)0 == dest ) return (char *)0;
    if( (const char *)0 == src ) return (char *)0;

    for( rv = dest; max && ((*dest = *src) != 0); dest++, src++, max-- )
        ;

#ifdef JLRU
    while( --max )
        *++dest = '\0';
#endif /* JLRU */

    return rv;
}

PR_IMPLEMENT(char *)
PL_strncpyz(char *dest, const char *src, PRUint32 max)
{
    char *rv;
    
    if( (char *)0 == dest ) return (char *)0;
    if( (const char *)0 == src ) return (char *)0;
    if( 0 == max ) return (char *)0;

    for( rv = dest, max--; max && ((*dest = *src) != 0); dest++, src++, max-- )
        ;

    *dest = '\0';

    return rv;
}