isdotdot.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 51 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The 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 SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
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*  ========================================================================
*
* Description:  IsDotOrDotDot() - check file is "." or ".."
*
****************************************************************************/

/*
 *  Motivation:
 *      Under HPFS it's possible to have directories and filenames that
 *      start with a '.'.
*/

int IsDotOrDotDot( const char *fname )
{
    /* return 1 if fname is "." or "..", 0 otherwise */

    if( fname[0] != '.' )
        return( 0 );
    if( fname[1] == 0 )
        return( 1 );
    if( fname[1] != '.' )
        return( 0 );
    if( fname[2] == 0 )
        return( 1 );
    return( 0 );
}