winlkup.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 86 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
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*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


#include "dbgdefn.h"
#include "dbgmem.h"
#include <string.h>
#include "windows.h"


#ifndef __NT__
char *DOSEnvFind( char *src )
{
    char        *env;
    char        *p;

    env = GetDOSEnvironment();
    do {
        p = src;
        do {
            if( *p == NULLCHAR && *env == '=' ) return( env + 1 );
        } while( *env++ == *p++ );
        while( *env++ != NULLCHAR )
            ;
    } while( *env != NULLCHAR );
    return( NULL );
}

/*
 * EnvLkup -- lookup up string in environment area
 */

int EnvLkup( char *src, char *dst, int max_len )
{
    int         len;
    char        *env;

    max_len = max_len; // nyi obey
    env = DOSEnvFind( src );
    if( env == NULL ) {
        *dst = NULLCHAR;
        return( 0 );
    }
    for( len = 0; ( *dst++ = *env++ ) != NULLCHAR; len++ ) {}
    return( len );
}
#else
/*
 * EnvLkup -- lookup up string in environment area
 */

int EnvLkup( char *src, char *dst, int max_len )
{

    return( GetEnvironmentVariable( src, dst, max_len ) );
}
#endif