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/****************************************************************************

*

*                            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:  Handle manager routines.

*

****************************************************************************/

#include "variety.h"

#include 

#include 

#include "liballoc.h"

#include 

#ifdef _M_IX86

 #include 

#endif

#include 

#include 

#if defined(__OS2__)

#elif defined(__WINDOWS__) || defined(__NT__)

#endif

#include "iomode.h"

#include "fileacc.h"

#include "rtinit.h"

#include "seterrno.h"

#include "handleio.h"

#undef __getOSHandle

extern  unsigned    __NFiles;       // the size of the iomode array

extern  void        __grow_iomode( int num );

        unsigned    __NHandles = 0;

#if defined(__NT__)

HANDLE *__OSHandles = NULL;

unsigned __growPOSIXHandles( unsigned num )

{

    HANDLE *new2;

    unsigned i;

    if( num > __NHandles )

    {

        _AccessFList();

        if( __OSHandles == NULL )

        {

            new2 = lib_malloc( num * sizeof( int ) );

        }

        else

        {

            new2 = lib_realloc( __OSHandles, num * sizeof( int ) );

        }

        if( new2 == NULL )

        {

            __set_errno( ENOMEM );

            num = __NHandles;

        }

        else

        {

            for( i = __NHandles; i < num; i++ )

            {

                new2[ i ] = NULL_HANDLE;

            }

            __OSHandles = new2;

            __NHandles = num;

        }

        _ReleaseFList();

    }

    return( __NHandles );

}

int __allocPOSIXHandle( HANDLE hdl )

{

    int i;

    _AccessFList();

    for( i = 0; i < __NHandles; i++ )

    {

        if( __OSHandles[i] == NULL_HANDLE ) break;

    }

    if( i >= __NHandles )

    {

                                // 20 -> (20+10+1) -> 31

                                // 31 -> (31+15+1) -> 47

                                // 47 -> (47+23+1) -> 71

        __growPOSIXHandles( i + (i >> 1) + 1 );

        // keep iomode array in sync

        if( __NHandles > __NFiles ) __grow_iomode( __NHandles );

        for( ; i < __NHandles; i++ )

        {

            if( __OSHandles[i] == NULL_HANDLE ) break;

        }

    }

    if( i >= __NHandles )

    {

        i = -1;

    } else {

        __OSHandles[i] = hdl;

    }

    _ReleaseFList();

    return( i );

}

void __freePOSIXHandle( int hid )

{

    __OSHandles[ hid ] = NULL_HANDLE;

}

HANDLE __getOSHandle( int hid )

{

    return( __OSHandles[ hid ] );

}

int __setOSHandle( unsigned hid, HANDLE hdl )

{

    // call the Win32 API for a standard file handle

    switch( hid ) {

    case STDIN_FILENO:

//        SetStdHandle( STD_INPUT_HANDLE, hdl );

        break;

    case STDOUT_FILENO:

//        SetStdHandle( STD_OUTPUT_HANDLE, hdl );

        break;

    case STDERR_FILENO:

//        SetStdHandle( STD_ERROR_HANDLE, hdl );

        break;

    }

    if( hid < __NHandles )

    {

        __OSHandles[ hid ] = hdl;

    }

    else

    {

        hid = (unsigned)-1;     // this should never happen

    }

    return( hid );

}

HANDLE *__FakeHandles = 0;

static int __topFakeHandle = 0;

HANDLE __NTGetFakeHandle( void )

{

    HANDLE os_handle;

    static DWORD fakeHandle = 0x80000000L;

    _AccessFList();

    fakeHandle++;

    os_handle = (HANDLE)fakeHandle;

    _ReleaseFList();

    return( os_handle );

}

// called from library startup code

void __initPOSIXHandles( void )

{

    HANDLE h;

    // __OSHandles = NULL;

    // __NHandles = 0;

    __growPOSIXHandles( __NFiles );

    h = 0; //GetStdHandle( STD_INPUT_HANDLE );

    if( h == 0 || h == INVALID_HANDLE_VALUE ) {

        h = (HANDLE)__NTGetFakeHandle();

    }

    __allocPOSIXHandle( h );        // should return 0==STDIN_FILENO

    h = 0; //GetStdHandle( STD_OUTPUT_HANDLE );

    if( h == 0 || h == INVALID_HANDLE_VALUE ) {

        h = (HANDLE)__NTGetFakeHandle();

    }

    __allocPOSIXHandle( h );        // should return 1==STDOUT_FILENO

    h = 0; //GetStdHandle( STD_ERROR_HANDLE );

    if( h == 0 || h == INVALID_HANDLE_VALUE ) {

        h = (HANDLE)__NTGetFakeHandle();

    }

    __allocPOSIXHandle( h );        // should return 3==STDERR_FILENO

}

static void __finiPOSIXHandles( void )

{

    if( __OSHandles != NULL ) {

        lib_free( __OSHandles );

        __OSHandles = NULL;

    }

    if( __FakeHandles != NULL )

    {

        int i;

        for( i = 0 ; i < __topFakeHandle ; i++ )

        {

          //  CloseHandle( __FakeHandles[i] );

        }

        lib_free( __FakeHandles );

        __FakeHandles = 0;

    }

}

AYI( __finiPOSIXHandles, INIT_PRIORITY_LIBRARY-1 )

#endif

void __set_handles( int num )

{

    __NHandles = num;

}

_WCRTLINK int _grow_handles( int num )

{

    if( num > __NHandles )

    {

        #if defined(MSDOS)

        #elif defined( __OS2_286__ )

        #elif defined( __WARP__ )

        #elif defined(__WINDOWS__)

        #elif defined(__NT__)

        {

            num = __growPOSIXHandles( num );

        }

        #elif defined(__NETWARE__)

        #elif defined(__UNIX__)

        #endif

        if( num > __NFiles ) {

            __grow_iomode( num );   // sets new __NFiles if successful

        }

        __NHandles = num;

    }

    return( __NHandles );

}