{
    This file is part of the Free Pascal run time library.
    Copyright (c) 2005 Karoly Balogh for Genesi S.a.r.l.

    asl.library interface unit for MorphOS/PowerPC

    Based on work of Nils Sjoholm member of the Amiga RTL
    development team.

    MorphOS port was done on a free Pegasos II/G4 machine
    provided by Genesi S.a.r.l. <www.genesi.lu>

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}

{$PACKRECORDS 2}
unit asl;

interface

uses exec, utility, workbench, agraphics;


{************************************************************************}

const
  ASLNAME: PChar = 'asl.library';
  ASL_TB = TAG_USER + $80000;

{************************************************************************}

{ Types of requesters known to ASL, used as arguments to AllocAslRequest() }
  ASL_FileRequest       = 0;
  ASL_FontRequest       = 1;
  ASL_ScreenModeRequest = 2;


{****************************************************************************
 *
 * ASL File Requester data structures and constants
 *
 * This structure must only be allocated by asl.library amd is READ-ONLY!
 * Control of the various fields is provided via tags when the requester
 * is created with AllocAslRequest() and when it is displayed via
 * AslRequest()
 }

type
  PFileRequester = ^TFileRequester;
  TFileRequester = record
    case SmallInt of
      0: (
        rf_Reserved0: array[0..3] of Byte;
        rf_File: STRPTR;         // Filename pointer
        rf_Dir: STRPTR;          // Directory name pointer
        rf_Reserved1: array[0..9] of Byte;
        rf_LeftEdge: SmallInt;
        rf_TopEdge: SmallInt;    // Preferred window pos
        rf_Width: SmallInt;
        rf_Height: SmallInt;     // Preferred window size
        rf_Reserved2: array[0..1] of Byte;
        rf_NumArgs: LongInt;     // A-la WB Args, FOR multiselects
        rf_ArgList: PWBArgList;
        rf_UserData: APTR;       // Applihandle (you may write!!)
        rf_Reserved3: array[0..7] of Byte;
        rf_Pat: STRPTR;          // Pattern match pointer
      );
      1: (
        fr_Reserved0: array[0..3] of Byte;
        fr_File: STRPTR;         // Filename pointer
        fr_Drawer: STRPTR;          // Directory name pointer
        fr_Reserved1: array[0..9] of Byte;
        fr_LeftEdge: SmallInt;
        fr_TopEdge: SmallInt;    // Preferred window pos
        fr_Width: SmallInt;
        fr_Height: SmallInt;     // Preferred window size
        fr_Reserved2: array[0..1] of Byte;
        fr_NumArgs: LongInt;     // A-la WB Args, FOR multiselects
        fr_ArgList: PWBArgList;
        fr_UserData: APTR;       // Applihandle (you may write!!)
        fr_Reserved3: array[0..7] of Byte;
        fr_Pattern: STRPTR;      // Pattern match pointer
      );
  end;                       // note - more reserved fields follow

// File requester tag values, used by AllocAslRequest() and AslRequest()

const
  ASLFR_TitleText = ASL_TB + 1; // Title of requester
  ASLFR_Window    = ASL_TB + 2; // Parent window

  ASLFR_InitialLeftEdge = ASL_TB + 3; // Initial requester coordinates
  ASLFR_InitialTopEdge  = ASL_TB + 4;
  ASLFR_InitialWidth    = ASL_TB + 5; // Initial requester dimensions
  ASLFR_InitialHeight   = ASL_TB + 6;

  ASLFR_HookFunc = ASL_TB + 7; // Combined callback function

  ASLFR_InitialFile    = ASL_TB + 8;  // Initial contents of File gadget
  ASLFR_InitialDrawer  = ASL_TB + 9;  // Initial contents of Drawer gadg.
  ASLFR_InitialPattern = ASL_TB + 10; // Initial contents of Pattern gadg.

  ASLFR_PositiveText = ASL_TB + 18; // Positive gadget text
  ASLFR_NegativeText = ASL_TB + 19; // Negative gadget text

  ASLFR_Flags1 = ASL_TB + 20; // Option flags
  ASLFR_Flags2 = ASL_TB + 22; // Additional option flags

  ASLFR_Screen        = ASL_TB + 40; // Screen to open on if no window
  ASLFR_PubScreenName = ASL_TB + 41; // Name of public screen
  ASLFR_PrivateIDCMP  = ASL_TB + 42; // Allocate private IDCMP?
  ASLFR_SleepWindow   = ASL_TB + 43; // Block input in ASLFR_Window?

  ASLFR_DoSaveMode    = ASL_TB + 44; // Being used for saving?
  ASLFR_DoMultiSelect = ASL_TB + 45; // Do multi-select?
  ASLFR_DoPatterns    = ASL_TB + 46; // Display a Pattern gadget?

  ASLFR_DrawersOnly = ASL_TB + 47; // Don't display files?
  ASLFR_FilterFunc  = ASL_TB + 49; // Function to filter files

  ASLFR_Locale   = ASL_TB + 50; // Locale ASL should use for text
  ASLFR_TextAttr = ASL_TB + 51; // Text font to use for gadget text
  ASLFR_UserData = ASL_TB + 52; // What to put in fr_UserData

  ASLFR_RejectIcons   = ASL_TB + 60; // Display .info files?
  ASLFR_RejectPattern = ASL_TB + 61; // Don't display files matching pat
  ASLFR_AcceptPattern = ASL_TB + 62; // Accept only files matching pat
  ASLFR_FilterDrawers = ASL_TB + 63; // Also filter drawers with patterns

  ASLFR_IntuiMsgFunc = ASL_TB + 70; // Function to handle IntuiMessages

  ASLFR_SetSortBy      = ASL_TB + 124; // Sort criteria (name, date, size)
  ASLFR_GetSortBy      = ASL_TB + 125;
  ASLFR_SetSortDrawers = ASL_TB + 126; // Placement of drawers in the list
  ASLFR_GetSortDrawers = ASL_TB + 127;
  ASLFR_SetSortOrder   = ASL_TB + 128; // Order (ascending or descending)
  ASLFR_GetSortOrder   = ASL_TB + 129;
  // V44
  ASLFR_InitialShowVolumes = ASL_TB + 130; // Initially, show the volume list
  ASLFR_PopToFront         = ASL_TB + 131; // Make the requester window visible
  // V45
  ASLFR_Activate           = ASL_TB + 132; // Activate the requester window when

  // Flag bits for the ASLFR_Flags1 tag
  FRB_FILTERFUNC    = 7;
  FRB_INTUIFUNC     = 6;
  FRB_DOSAVEMODE    = 5;
  FRB_PRIVATEIDCMP  = 4;
  FRB_DOMULTISELECT = 3;
  FRB_DOPATTERNS    = 0;

  FRF_FILTERFUNC    = 1 shl FRB_FILTERFUNC;
  FRF_INTUIFUNC     = 1 shl FRB_INTUIFUNC;
  FRF_DOSAVEMODE    = 1 shl FRB_DOSAVEMODE;
  FRF_PRIVATEIDCMP  = 1 shl FRB_PRIVATEIDCMP;
  FRF_DOMULTISELECT = 1 shl FRB_DOMULTISELECT;
  FRF_DOPATTERNS    = 1 shl FRB_DOPATTERNS;

  // Flag bits for the ASLFR_Flags2 tag
  FRB_DRAWERSONLY   = 0;
  FRB_FILTERDRAWERS = 1;
  FRB_REJECTICONS   = 2;

  FRF_DRAWERSONLY   = 1 shl FRB_DRAWERSONLY;
  FRF_FILTERDRAWERS = 1 shl FRB_FILTERDRAWERS;
  FRF_REJECTICONS   = 1 shl FRB_REJECTICONS;

  // Sort criteria for the ASLFR_SetSortBy/ASLFR_GetSortBy tags
  ASLFRSORTBY_Name = 0;
  ASLFRSORTBY_Date = 1;
  ASLFRSORTBY_Size = 2;

  // Drawer placement for the ASLFR_SetSortDrawers/ASLFR_GetSortDrawers tags
  ASLFRSORTDRAWERS_First = 0;
  ASLFRSORTDRAWERS_Mix   = 1;
  ASLFRSORTDRAWERS_Last  = 2;

  // Sort order for the ASLFR_SetSortOrder/ASLFR_GetSortOrder tags
  ASLFRSORTORDER_Ascend  = 0;
  ASLFRSORTORDER_Descend = 1;

{****************************************************************************
 *
 * ASL Font Requester data structures and constants
 *
 * This structure must only be allocated by asl.library amd is READ-ONLY!
 * Control of the various fields is provided via tags when the requester
 * is created with AllocAslRequest() and when it is displayed via
 * AslRequest()
 }

type
  PFontRequester = ^TFontRequester;
  TFontRequester = record
    fo_Reserved0: array[0..7] of Byte;
    fo_Attr: TTextAttr;    // Returned TextAttr
    fo_FrontPen: Byte;     // Returned front pen
    fo_BackPen: Byte;      // Returned back pen
    fo_DrawMode: Byte;     // Returned drawing mode
    fo_Reserved1: Byte;
    fo_UserData: APTR;     // You can store your own data here
    fo_LeftEdge: SmallInt; // Coordinates Of requester on Exit
    fo_TopEdge: SmallInt;
    fo_Width: SmallInt;
    fo_Height: SmallInt;
    fo_TAttr: TTTextAttr;  // Returned TTextAttr
  end;

// Font requester tag values, used by AllocAslRequest() AND AslRequest()
const
  ASLFO_TitleText = ASL_TB + 1; // Title of requester
  ASLFO_Window    = ASL_TB + 2; // Parent window

  ASLFO_InitialLeftEdge = ASL_TB + 3; // Initial requester coordinates
  ASLFO_InitialTopEdge  = ASL_TB + 4;
  ASLFO_InitialWidth    = ASL_TB + 5; // Initial requester dimensions
  ASLFO_InitialHeight   = ASL_TB + 6;

  ASLFO_HookFunc = ASL_TB + 7; // Combined callback function

  ASLFO_InitialName     = ASL_TB + 10; // Initial contents of Name gadget
  ASLFO_InitialSize     = ASL_TB + 11; // Initial contents of Size gadget
  ASLFO_InitialStyle    = ASL_TB + 12; // Initial font style
  ASLFO_InitialFlags    = ASL_TB + 13; // Initial font flags for TextAttr
  ASLFO_InitialFrontPen = ASL_TB + 14; // Initial front pen
  ASLFO_InitialBackPen  = ASL_TB + 15; // Initial back pen

  ASLFO_MinHeight = ASL_TB + 16; // Minimum font height to display
  ASLFO_MaxHeight = ASL_TB + 17; // Maximum font height to display

  ASLFO_PositiveText = ASL_TB + 18; // Positive gadget text
  ASLFO_NegativeText = ASL_TB + 19; // Negative gadget text

  ASLFO_Flags = ASL_TB + 20; // Option flags

  ASLFO_ModeList = ASL_TB + 21; // Substitute list for drawmodes

  ASLFO_Screen        = ASL_TB + 40; // Screen to open on if no window
  ASLFO_PubScreenName = ASL_TB + 41; // Name of public screen
  ASLFO_PrivateIDCMP  = ASL_TB + 42; // Allocate private IDCMP?
  ASLFO_SleepWindow   = ASL_TB + 43; // Block input in ASLFO_Window?

  ASLFO_DoFrontPen = ASL_TB + 44; // Display Front color selector?
  ASLFO_DoBackPen  = ASL_TB + 45; // Display Back color selector?
  ASLFO_DoStyle    = ASL_TB + 46; // Display Style checkboxes?
  ASLFO_DoDrawMode = ASL_TB + 47; // Display DrawMode cycle gadget?

  ASLFO_FixedWidthOnly = ASL_TB + 48; // Only allow fixed-width fonts?

  ASLFO_FilterFunc = ASL_TB + 49; // Function to filter fonts

  ASLFO_Locale   = ASL_TB + 50; // Locale ASL should use for text
  ASLFO_TextAttr = ASL_TB + 51; // Text font to use for gadget text
  ASLFO_UserData = ASL_TB + 52; // What to put in fo_UserData

  ASLFO_InitialDrawMode = ASL_TB + 59; // Initial draw mode

  ASLFO_FrontPens = ASL_TB + 64; // Color table for front pen palette
  ASLFO_BackPens  = ASL_TB + 65; // Color table for back pen palette

  ASLFO_MaxFrontPen = ASL_TB + 66; // Max # of colors in front palette
  ASLFO_MaxBackPen  = ASL_TB + 67; // Max # of colors in back palette

  ASLFO_IntuiMsgFunc = ASL_TB + 70; // Function to handle IntuiMessages
  // V44
  ASLFO_PopToFront = ASL_TB + 131;  // Make the requester window visible  when it opens
  // V45
  ASLFO_Activate   = ASL_TB + 132; // Activate the requester window when it opens
  ASLFO_SampleText = ASL_TB + 133; // Text to display in font sample area

  // Flag bits for ASLFO_Flags tag
  FOB_DOFRONTPEN     = 0;
  FOB_DOBACKPEN      = 1;
  FOB_DOSTYLE        = 2;
  FOB_DODRAWMODE     = 3;
  FOB_FIXEDWIDTHONLY = 4;
  FOB_PRIVATEIDCMP   = 5;
  FOB_INTUIFUNC      = 6;
  FOB_FILTERFUNC     = 7;

  FOF_DOFRONTPEN     = 1 shl FOB_DOFRONTPEN;
  FOF_DOBACKPEN      = 1 shl FOB_DOBACKPEN;
  FOF_DOSTYLE        = 1 shl FOB_DOSTYLE;
  FOF_DODRAWMODE     = 1 shl FOB_DODRAWMODE;
  FOF_FIXEDWIDTHONLY = 1 shl FOB_FIXEDWIDTHONLY;
  FOF_PRIVATEIDCMP   = 1 shl FOB_PRIVATEIDCMP;
  FOF_INTUIFUNC      = 1 shl FOB_INTUIFUNC;
  FOF_FILTERFUNC     = 1 shl FOB_FILTERFUNC;

{****************************************************************************
 *
 * ASL Screen Mode Requester data structures and constants
 *
 * This structure must only be allocated by asl.library and is READ-ONLY!
 * Control of the various fields is provided via tags when the requester
 * is created with AllocAslRequest() and when it is displayed via
 * AslRequest()
 }

type
  PScreenModeRequester = ^TScreenModeRequester;
  TScreenModeRequester = record
    sm_DisplayID: Cardinal;     // Display mode ID
    sm_DisplayWidth: Cardinal;  // Width of display in pixels
    sm_DisplayHeight: Cardinal; // Height of display in pixels
    sm_DisplayDepth: Word;      // Number of bit-planes of display
    sm_OverscanType: Word;      // type of overscan of display
    sm_AutoScroll: WordBool;    // Display should auto-scroll?

    sm_BitMapWidth: Cardinal;   // Used to create your own BitMap
    sm_BitMapHeight: Cardinal;

    sm_LeftEdge: SmallInt;      // Coordinates of requester on Exit
    sm_TopEdge: SmallInt;
    sm_Width: SmallInt;
    sm_Height: SmallInt;

    sm_InfoOpened: WordBool;    // Info window opened on exit?
    sm_InfoLeftEdge: SmallInt;  // Last coordinates of Info window
    sm_InfoTopEdge: SmallInt;
    sm_InfoWidth: SmallInt;
    sm_InfoHeight: SmallInt;

    sm_UserData: APTR;          // You can store your own data here
    // fields below are available from asl.library V51

    sm_MonitorName: STRPTR; // Name of the monitor this sm_DisplayID is tied to To be passed as SA_MonitorName

    sm_DisplayIDWidth: Cardinal; // sm_DisplayID resolution, to be passed as SA_DisplayWidth/Height in OpenScreen
    sm_DisplayIDHeight: Cardinal;
  end;


{ An Exec list of custom modes can be added to the list of available modes.
 * The DimensionInfo structure must be completely initialized, including the
 * Header. See <graphics/displayinfo.h>. Custom mode ID's must be in the range
 * $FFFF0000..$FFFFFFFF. Regular properties which apply to your custom modes
 * can be added in the dn_PropertyFlags field. Custom properties are not
 * allowed.
 }
  PDisplayMode = ^TDisplayMode;
  TDisplayMode = record
    dm_Node: TNode;                   // see ln_Name
    dm_DimensionInfo: TDimensionInfo; // mode description
    dm_PropertyFlags: Cardinal;       // applicable properties
  end;

  // ScreenMode requester tag values, used by AllocAslRequest() and AslRequest()
const
  ASLSM_TitleText = ASL_TB + 1; // Title of requester
  ASLSM_Window    = ASL_TB + 2; // Parent window

  ASLSM_InitialLeftEdge = ASL_TB + 3; // Initial requester coordinates
  ASLSM_InitialTopEdge  = ASL_TB + 4;
  ASLSM_InitialWidth    = ASL_TB + 5; // Initial requester dimensions
  ASLSM_InitialHeight   = ASL_TB + 6;

  ASLSM_PositiveText = ASL_TB + 18; // Positive gadget text
  ASLSM_NegativeText = ASL_TB + 19; // Negative gadget text

  ASLSM_Screen        = ASL_TB + 40; // Screen to open on if no window
  ASLSM_PubScreenName = ASL_TB + 41; // Name of public screen
  ASLSM_PrivateIDCMP  = ASL_TB + 42; // Allocate private IDCMP?
  ASLSM_SleepWindow   = ASL_TB + 43; // Block input in ASLSM_Window?

  ASLSM_Locale   = ASL_TB + 50; // Locale ASL should use for text
  ASLSM_TextAttr = ASL_TB + 51; // Text font to use for gadget text
  ASLSM_UserData = ASL_TB + 52; // What to put in sm_UserData

  ASLSM_IntuiMsgFunc = ASL_TB + 70; // Function to handle IntuiMessages

  ASLSM_InitialDisplayID     = ASL_TB + 100; // Initial display mode id
  ASLSM_InitialDisplayWidth  = ASL_TB + 101; // Initial display width
  ASLSM_InitialDisplayHeight = ASL_TB + 102; // Initial display height
  ASLSM_InitialDisplayDepth  = ASL_TB + 103; // Initial display depth
  ASLSM_InitialOverscanType  = ASL_TB + 104; // Initial type of overscan
  ASLSM_InitialAutoScroll    = ASL_TB + 105; // Initial autoscroll setting
  ASLSM_InitialInfoOpened    = ASL_TB + 106; // Info wndw initially opened?
  ASLSM_InitialInfoLeftEdge  = ASL_TB + 107; // Initial Info window coords.
  ASLSM_InitialInfoTopEdge   = ASL_TB + 108;

  ASLSM_DoWidth        = ASL_TB + 109; // Display Width gadget?
  ASLSM_DoHeight       = ASL_TB + 110; // Display Height gadget?
  ASLSM_DoDepth        = ASL_TB + 111; // Display Depth gadget?
  ASLSM_DoOverscanType = ASL_TB + 112; // Display Overscan Type gadget?
  ASLSM_DoAutoScroll   = ASL_TB + 113; // Display AutoScroll gadget?

  ASLSM_PropertyFlags = ASL_TB + 114; // Must have these Property flags
  ASLSM_PropertyMask  = ASL_TB + 115; // Only these should be looked at
  ASLSM_MinWidth      = ASL_TB + 116; // Minimum display width to allow
  ASLSM_MaxWidth      = ASL_TB + 117; // Maximum display width to allow
  ASLSM_MinHeight     = ASL_TB + 118; // Minimum display height to allow
  ASLSM_MaxHeight     = ASL_TB + 119; // Maximum display height to allow
  ASLSM_MinDepth      = ASL_TB + 120; // Minimum display depth
  ASLSM_MaxDepth      = ASL_TB + 121; // Maximum display depth
  ASLSM_FilterFunc    = ASL_TB + 122; // Function to filter mode id's

  ASLSM_CustomSMList = ASL_TB + 123; // Exec list of struct DisplayMode
  // V44
  ASLSM_PopToFront = ASL_TB + 131; // Make the requester window visible when it opens
  // V45
  ASLSM_Activate = ASL_TB + 132; // Activate the requester window when it opens

  ASL_LAST_TAG = ASL_TB + 133;

{***************************************************************************}

{ This defines the rendezvous data for setting and querying asl.library's
 * defaults for the window size and the file requester sort order. The name
 * of the semaphore is given below; it exists only with asl.library V45 and
 * IPrefs V45 and beyond.
 }
  ASL_SEMAPHORE_NAME: PChar = 'asl.library';

type
  PAslSemaphore = ^TAslSemaphore;
  TAslSemaphore = record
    as_Semaphore: TSignalSemaphore;
    as_Version: Word;       // Must be >= 45
    as_Size: Cardinal;      // Size of this data structure.

    as_SortBy: Byte;        // File requester defaults; name, date or size
    as_SortDrawers: Byte;   // File requester defaults; first, mix or last
    as_SortOrder: Byte;     // File requester defaults; ascending or descending

    as_SizePosition: Byte;  // See below

    as_RelativeLeft: Word;  // Window position offset
    as_RelativeTop: Word;

    as_RelativeWidth: Byte; // Window size factor; this is a percentage of the parent window/screen width.
    as_RelativeHeight : Byte;
  end;

const
  // Default position of the ASL window.
  ASLPOS_DefaultPosition = 0; // Position is calculated according to the builtin rules.
  ASLPOS_CenterWindow    = 1; // Centred within the bounds of the parent window.
  ASLPOS_CenterScreen    = 2; // Centred within the bounds of the parent screen.
  ASLPOS_WindowPosition  = 3; // Relative to the top left corner of the parent window, using the offset values provided in the as_RelativeLeft/as_RelativeTop members.
  ASLPOS_ScreenPosition  = 4; // Relative to the top left corner of the parent screen, using the offset values provided in the as_RelativeLeft/as_RelativeTop members.
  ASLPOS_CenterMouse     = 5; // Directly below the mouse pointer.
  ASLPOS_MASK            = $0F;
  // Default size of the ASL window.
  ASLSIZE_DefaultSize  = 0 shl 4; // Size is calculated according to the builtin rules.
  ASLSIZE_RelativeSize = 1 shl 4; // Size is relative to the size of the parent window or screen, using the values provided in
                                  // the as_RelativeWidth/as_RelativeHeight members. The as_RelativeWidth/as_RelativeHeight values are
                                  // taken as percentage, i.e. a value of "50" stands for 50% of the width/height of the parent window/screen.
  ASLSIZE_MASK = $30;
  // Other options.
  ASLOPTION_ASLOverrides = 1 shl 6; // ASL determines placement and size of requester windows; application's choice is ignored.

{****************************************************************************
 *
 * Obsolete ASL definitions, here for source code compatibility only.
 * Please do NOT use in new code.
 *
 *   define ASL_V38_NAMES_ONLY to remove these older names
 }
{$define ASL_V38_NAMES_ONLY}
{$ifndef ASL_V38_NAMES_ONLY}
const
  ASL_Dummy      = TAG_USER + $80000;
  ASL_Hail       = ASL_Dummy + 1;
  ASL_Window     = ASL_Dummy + 2;
  ASL_LeftEdge   = ASL_Dummy + 3;
  ASL_TopEdge    = ASL_Dummy + 4;
  ASL_Width      = ASL_Dummy + 5;
  ASL_Height     = ASL_Dummy + 6;
  ASL_HookFunc   = ASL_Dummy + 7;
  ASL_File       = ASL_Dummy + 8;
  ASL_Dir        = ASL_Dummy + 9;
  ASL_FontName   = ASL_Dummy + 10;
  ASL_FontHeight = ASL_Dummy + 11;
  ASL_FontStyles = ASL_Dummy + 12;
  ASL_FontFlags  = ASL_Dummy + 13;
  ASL_FrontPen   = ASL_Dummy + 14;
  ASL_BackPen    = ASL_Dummy + 15;
  ASL_MinHeight  = ASL_Dummy + 16;
  ASL_MaxHeight  = ASL_Dummy + 17;
  ASL_OKText     = ASL_Dummy + 18;
  ASL_CancelText = ASL_Dummy + 19;
  ASL_FuncFlags  = ASL_Dummy + 20;
  ASL_ModeList   = ASL_Dummy + 21;
  ASL_ExtFlags1  = ASL_Dummy + 22;
  ASL_Pattern    = ASL_FontName;

  // remember what I said up there? Do not use these anymore!
  FILB_DOWILDFUNC  = 7;
  FILB_DOMSGFUNC   = 6;
  FILB_SAVE        = 5;
  FILB_NEWIDCMP    = 4;
  FILB_MULTISELECT = 3;
  FILB_PATGAD      = 0;

  FILF_DOWILDFUNC  = 1 shl FILB_DOWILDFUNC;
  FILF_DOMSGFUNC   = 1 shl FILB_DOMSGFUNC;
  FILF_SAVE        = 1 shl FILB_SAVE;
  FILF_NEWIDCMP    = 1 shl FILB_NEWIDCMP;
  FILF_MULTISELECT = 1 shl FILB_MULTISELECT;
  FILF_PATGAD      = 1 shl FILB_PATGAD;

  FIL1B_NOFILES   = 0;
  FIL1B_MATCHDIRS = 1;
  FIL1F_NOFILES   = 1 shl FIL1B_NOFILES;
  FIL1F_MATCHDIRS = 1 shl FIL1B_MATCHDIRS;

  FONB_FRONTCOLOR  = 0;
  FONB_BACKCOLOR   = 1;
  FONB_STYLES      = 2;
  FONB_DRAWMODE    = 3;
  FONB_FIXEDWIDTH  = 4;
  FONB_NEWIDCMP    = 5;
  FONB_DOMSGFUNC   = 6;
  FONB_DOWILDFUNC  = 7;

  FONF_FRONTCOLOR  = 1 shl FONB_FRONTCOLOR;
  FONF_BACKCOLOR   = 1 shl FONB_BACKCOLOR;
  FONF_STYLES      = 1 shl FONB_STYLES;
  FONF_DRAWMODE    = 1 shl FONB_DRAWMODE;
  FONF_FIXEDWIDTH  = 1 shl FONB_FIXEDWIDTH;
  FONF_NEWIDCMP    = 1 shl FONB_NEWIDCMP;
  FONF_DOMSGFUNC   = 1 shl FONB_DOMSGFUNC;
  FONF_DOWILDFUNC  = 1 shl FONB_DOWILDFUNC;
{$endif ASL_V38_NAMES_ONLY}


var
  AslBase: PLibrary = nil;

function AllocFileRequest: PFileRequester; SysCall AslBase 030;
procedure FreeFileRequest(FileReq: PFileRequester location 'a0'); SysCall AslBase 036;
function RequestFile(FileReq: PFileRequester location 'a0'): LongBool; SysCall AslBase 042;
function AllocAslRequest(ReqType: Cardinal location 'd0'; TagList: PTagItem location 'a0'): APTR; SysCall AslBase 048;
procedure FreeAslRequest(Requester: APTR location 'a0'); SysCall AslBase 054;
function AslRequest(Requester: APTR location 'a0'; TagList: PTagItem location 'a1'): LongBool; SysCall AslBase 060;
procedure AbortAslRequest(Requester: APTR location 'a0'); SysCall AslBase 078;
procedure ActivateAslRequest(Requester: APTR location 'a0'); SysCall AslBase 084;

function AllocAslRequestTags(ReqType: Cardinal; const TagList: array of PtrUInt): APTR; Inline;
function AslRequestTags(Requester: APTR; const TagList: array of PtrUInt): LongBool; Inline;

function InitAslLibrary : boolean;

implementation

function AllocAslRequestTags(ReqType: Cardinal; const TagList: array of PtrUInt): APTR; Inline;
begin
  AllocAslRequestTags := AllocAslRequest(ReqType, @tagList);
end;

function AslRequestTags(Requester: APTR; const TagList: array of PtrUInt): LongBool; Inline;
begin
  AslRequestTags := AslRequest(Requester, @TagList);
end;

const
  // Change VERSION and LIBVERSION to proper values
  VERSION : string[2] = '0';
  LIBVERSION: LongWord = 0;

function InitAslLibrary: Boolean;
begin
  InitAslLibrary := Assigned(AslBase);
end;

initialization
  AslBase := OpenLibrary(ASLNAME, LIBVERSION);
finalization
  if Assigned(AslBase) then
    CloseLibrary(PLibrary(AslBase));
end.