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getenvrn.c
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getenvrn.c
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/* This is an original work by Rick Whitt and is placed in the public domain.
Rev 1.2a 09 Sep 1996 JO
Added underscore prefix to environ() calls for MSC 8.0
Note: 5.2e version will work if linked with MSC OldNames.lib
Rev 1.2 01 Jan 1996 03:01:00 TED
Added prototypes to kill compiler warning.
Rev 1.1 15 Aug 1991 23:08:42 GLENN
Forest Belt proofread/edited/cleaned up doc
Rev 1.0 17 Jul 1991 22:08:12 GLENN
Initial revision.
*/
#include "hbapi.h"
#include "hbapiitm.h"
#if defined( HB_OS_UNIX ) && ! defined( HB_OS_IOS )
#include <unistd.h>
#if defined( HB_OS_DARWIN )
#include <crt_externs.h>
#define environ ( *_NSGetEnviron() )
#elif ! defined( __WATCOMC__ )
extern char ** environ;
#endif
#elif defined( HB_OS_DOS )
#if defined( __DJGPP__ )
extern char ** environ;
#elif ! defined( __WATCOMC__ )
#define environ _environ
extern char ** _environ;
#endif
#elif defined( HB_OS_OS2 )
#if ! defined( __WATCOMC__ )
extern char ** environ;
#endif
#elif defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
#include "hbwinuni.h"
#include <windows.h>
#endif
#define NORETURN 0
#define CHARTYPE 1
#define ARRAYTYPE 2
#define CRLF "\x0D\x0A"
HB_FUNC( FT_GETE )
{
#if ( defined( HB_OS_UNIX ) && ! defined( HB_OS_IOS ) ) || \
defined( HB_OS_DOS ) || defined( HB_OS_OS2 )
{
char * buffer = NULL;
int x;
int buffsize = 0;
int rettype = HB_ISARRAY( 1 ) ? ARRAYTYPE :
( HB_ISCHAR( 1 ) && HB_ISBYREF( 1 ) ? CHARTYPE : NORETURN );
/* scan strings first and add up total size */
if( rettype == CHARTYPE )
{
for( x = 0; environ[ x ]; ++x )
{
/* add length of this string plus 2 for the crlf */
buffsize += ( strlen( environ[ x ] ) + 2 );
}
/* add 1 more byte for final nul character */
buffsize++;
/* now allocate that much memory and make sure 1st byte is a nul */
buffer = ( char * ) hb_xgrab( buffsize + 1 );
buffer[ 0 ] = '\0';
}
for( x = 0; environ[ x ]; ++x )
{
if( ! environ[ x ] )
/* null string, we're done */
break;
if( rettype == CHARTYPE )
{
/* tack string onto end of buffer */
hb_strncat( buffer, environ[ x ], buffsize );
/* add crlf at end of each string */
hb_strncat( buffer, CRLF, buffsize );
}
else if( rettype == ARRAYTYPE )
/* store string to next array element */
hb_storvc( environ[ x ], 1, x + 1 );
}
if( rettype == CHARTYPE )
{
/* return buffer to app and free memory */
if( ! hb_storclen_buffer( buffer, strlen( buffer ), 1 ) )
hb_xfree( buffer );
}
/* return number of strings found */
hb_retni( x );
}
#elif defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
{
LPTCH lpEnviron = GetEnvironmentStrings(), lpEnv;
HB_SIZE nCount = 0;
int rettype = HB_ISARRAY( 1 ) ? ARRAYTYPE :
( HB_ISCHAR( 1 ) && HB_ISBYREF( 1 ) ? CHARTYPE : NORETURN );
if( lpEnviron )
{
LPTSTR lpResult = NULL, lpDst;
PHB_ITEM pArray = NULL;
HB_SIZE nSize = 0;
if( rettype == CHARTYPE )
{
for( lpEnv = lpEnviron; *lpEnv; ++lpEnv )
{
while( *++lpEnv )
++nSize;
nSize += 3;
}
if( nSize > 0 )
lpResult = ( LPTSTR ) hb_xgrab( ( nSize + 1 ) * sizeof( TCHAR ) );
}
else if( rettype == ARRAYTYPE )
pArray = hb_param( 1, HB_IT_ARRAY );
for( lpEnv = lpEnviron, lpDst = lpResult; *lpEnv; ++lpEnv )
{
nCount++;
if( rettype == CHARTYPE )
{
do
{
*lpDst++ = *lpEnv++;
}
while( *lpEnv );
*lpDst++ = '\r';
*lpDst++ = '\n';
}
else if( rettype == ARRAYTYPE )
{
nSize = 0;
while( lpEnv[ ++nSize ] )
;
HB_ARRAYSETSTRLEN( pArray, nCount, lpEnv, nSize - 1 );
lpEnv += nSize;
}
}
FreeEnvironmentStrings( lpEnviron );
if( rettype == CHARTYPE )
{
PHB_ITEM pItem = HB_ITEMPUTSTRLEN( NULL, lpResult, nSize );
if( ! hb_itemParamStoreRelease( 1, pItem ) )
hb_itemRelease( pItem );
hb_xfree( lpResult );
}
}
else if( rettype == CHARTYPE )
hb_storc( NULL, 1 );
hb_retns( nCount );
}
#else
if( HB_ISCHAR( 1 ) )
hb_storc( NULL, 1 );
hb_retni( 0 );
#endif
}