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kolibrios/programs/develop/open watcom/trunk/clib/environ/getenv.c
Sergey Semyonov (Serge) 3be3768ce0 update CLib
git-svn-id: svn://kolibrios.org@614 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-08-28 10:31:46 +00:00

112 lines
3.5 KiB
C

/****************************************************************************
*
* 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
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Implementation of getenv().
*
****************************************************************************/
#include "variety.h"
#include "widechar.h"
#include <mbstring.h>
#include <stdlib.h>
#include <string.h>
#include "rtdata.h"
#ifdef __WIDECHAR__
#include "wenviron.h"
#endif
#if defined(__UNIX__)
#ifdef __WIDECHAR__
#define CMP_FUNC wcsncmp
#else
#define CMP_FUNC strncmp
#endif
#else
#define CMP_FUNC _wcsnicmp
#endif
#if !defined(__UNIX__) && !defined(__WIDECHAR__) && !defined(__NETWARE__)
_WCRTLINK char *getenv( const char *name )
{
char **envp;
char *p;
/*** Find the environment string ***/
__ptr_check( name, 0 );
envp = _RWD_environ;
if( (envp != NULL) && (name != NULL) ) {
for( ; p = *envp; ++envp ) {
const char *s = name;
while( *p != '\0' ) { /* simple check is sufficient for p, not s */
if ( _mbterm( s ) ) {
if( *p == '=' ) return( p + 1 );
break;
}
if ( _mbctoupper( _mbsnextc( p ) ) != _mbctoupper( _mbsnextc( s ) ) )
break;
p = _mbsinc( p ); /* skip over character */
s = _mbsinc( s ); /* skip over character */
}
}
}
return( NULL ); /* not found */
}
#else
_WCRTLINK CHAR_TYPE *__F_NAME(getenv,_wgetenv)( const CHAR_TYPE *name )
{
#ifdef __NETWARE__
name = name;
#else
CHAR_TYPE **envp;
CHAR_TYPE *p;
int len;
#ifdef __WIDECHAR__
if( _RWD_wenviron == NULL ) __create_wide_environment();
#endif
/*** Find the environment string ***/
__ptr_check( name, 0 );
envp = __F_NAME(_RWD_environ,_RWD_wenviron);
if( (envp != NULL) && (name != NULL) ) {
len = __F_NAME(strlen,wcslen)( name );
for( ; p = *envp; ++envp ) {
if( CMP_FUNC( p, name, len ) == 0 ) {
if( p[len] == __F_NAME('=',L'=') ) return( &p[len+1] );
}
}
}
#endif
return( NULL ); /* not found */
}
#endif