112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of getenv().
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*
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****************************************************************************/
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#include "variety.h"
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#include "widechar.h"
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#include <mbstring.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rtdata.h"
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#ifdef __WIDECHAR__
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#include "wenviron.h"
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#endif
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#if defined(__UNIX__)
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#ifdef __WIDECHAR__
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#define CMP_FUNC wcsncmp
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#else
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#define CMP_FUNC strncmp
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#endif
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#else
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#define CMP_FUNC _wcsnicmp
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#endif
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#if !defined(__UNIX__) && !defined(__WIDECHAR__) && !defined(__NETWARE__)
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_WCRTLINK char *getenv( const char *name )
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{
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char **envp;
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char *p;
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/*** Find the environment string ***/
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__ptr_check( name, 0 );
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envp = _RWD_environ;
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if( (envp != NULL) && (name != NULL) ) {
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for( ; p = *envp; ++envp ) {
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const char *s = name;
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while( *p != '\0' ) { /* simple check is sufficient for p, not s */
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if ( _mbterm( s ) ) {
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if( *p == '=' ) return( p + 1 );
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break;
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}
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if ( _mbctoupper( _mbsnextc( p ) ) != _mbctoupper( _mbsnextc( s ) ) )
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break;
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p = _mbsinc( p ); /* skip over character */
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s = _mbsinc( s ); /* skip over character */
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}
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}
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}
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return( NULL ); /* not found */
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}
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#else
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_WCRTLINK CHAR_TYPE *__F_NAME(getenv,_wgetenv)( const CHAR_TYPE *name )
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{
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#ifdef __NETWARE__
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name = name;
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#else
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CHAR_TYPE **envp;
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CHAR_TYPE *p;
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int len;
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#ifdef __WIDECHAR__
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if( _RWD_wenviron == NULL ) __create_wide_environment();
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#endif
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/*** Find the environment string ***/
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__ptr_check( name, 0 );
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envp = __F_NAME(_RWD_environ,_RWD_wenviron);
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if( (envp != NULL) && (name != NULL) ) {
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len = __F_NAME(strlen,wcslen)( name );
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for( ; p = *envp; ++envp ) {
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if( CMP_FUNC( p, name, len ) == 0 ) {
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if( p[len] == __F_NAME('=',L'=') ) return( &p[len+1] );
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}
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}
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}
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#endif
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return( NULL ); /* not found */
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}
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#endif
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