Amiga Times/AmigaTimes.iso/internet/Term/Extras/Source/gtlayout-source.lha/LT_InitExit.c

C/C++ Source or Header | 1996-08-22 | 4.9 KB | 231 lines

/*
**    GadTools layout toolkit
**
**    Copyright © 1993-1996 by Olaf `Olsen' Barthel
**        Freely distributable.
**
**    :ts=4
*/

#ifndef _GTLAYOUT_GLOBAL_H
#include "gtlayout_global.h"
#endif

/****** gtlayout.library/LT_Init ******************************************
*
*   NAME
*    LT_Init -- Initialize user interface code.
*
*   SYNOPSIS
*    LT_Init();
*
*    VOID LT_Init(VOID);
*
*   FUNCTION
*    You need to initialize the user interface code only once,
*    so it can set up its internals, open libraries, etc.
*    The code has to be initialized before any user interface
*    creation can take place.
*
*   NOTES
*    This function is not present in the shared library, only
*    in the link library. You need not and cannot invoke it in
*    the shared library.
*
*   SEE ALSO
*    gtlayout.library/LT_Exit
*
******************************************************************************
*
*/

BOOL LIBENT
LT_Init()
{
#ifndef LINK_LIB
    SysBase = *(struct ExecBase **)4;
#endif    // LINK_LIB

    if(SysBase->LibNode.lib_Version < 37)
        return(FALSE);
    else
    {
        STATIC struct { STRPTR Name; APTR *Library; } InitTable[] =
        {
            "intuition.library",    (APTR *)&IntuitionBase,
            "graphics.library",        (APTR *)&GfxBase,
            "utility.library",        (APTR *)&UtilityBase,
            "gadtools.library",        (APTR *)&GadToolsBase,
            "keymap.library",        (APTR *)&KeymapBase,
            "locale.library",        (APTR *)&LocaleBase
        };

        STATIC struct { STRPTR ClassName; LONG Size; HOOKFUNC Dispatcher; Class **ClassPtr; } ClassInitTable[] =
        {
            IMAGECLASS,        sizeof(ImageInfo),        (HOOKFUNC)LTP_ImageDispatch,        <P_ImageClass,

#ifdef DO_LEVEL_KIND
            IMAGECLASS,        sizeof(LevelImageInfo),    (HOOKFUNC)LTP_LevelClassDispatcher,    <P_LevelClass,
#endif    /* DO_LEVEL_KIND */

#if defined(DO_POPUP_KIND) && defined(DO_BOOPSI_KIND)
            GADGETCLASS,    sizeof(PopInfo),        (HOOKFUNC)LTP_PopupClassDispatcher,    <P_PopupClass,
#endif    /* DO_POPUP_KIND */

#if defined(DO_TAB_KIND) && defined(DO_BOOPSI_KIND)
            GADGETCLASS,    sizeof(TabInfo),        (HOOKFUNC)LTP_TabClassDispatcher,    <P_TabClass,
#endif    /* DO_TAB_KIND */

        };

        LONG i;

        V39 = (SysBase->LibNode.lib_Version >= 39);
        V40 = (SysBase->LibNode.lib_Version >= 40);

        for(i = 0 ; i < NUMELEMENTS(InitTable) ; i++)
            *InitTable[i].Library = OpenLibrary(InitTable[i].Name,37);

        if(IntuitionBase && GfxBase && UtilityBase && GadToolsBase && KeymapBase)
        {
            if(LocaleBase)
                LTP_Locale = OpenLocale(NULL);

            for(i = 0 ; i < NUMELEMENTS(ClassInitTable) ; i++)
            {
                if(*ClassInitTable[i].ClassPtr = MakeClass(NULL,ClassInitTable[i].ClassName,NULL,ClassInitTable[i].Size,0))
                    (*ClassInitTable[i].ClassPtr)->cl_Dispatcher.h_Entry = ClassInitTable[i].Dispatcher;
                else
                {
                    LT_Exit();
                    return(FALSE);
                }
            }

#ifdef DO_PICKSHORTCUTS
            InitSemaphore(<P_KeySemaphore);

            if(!(LTP_Keys[0] = (UBYTE *)AllocMem(512,MEMF_ANY|MEMF_CLEAR)))
            {
                LT_Exit();
                return(FALSE);
            }
#endif    /* DO_PICKSHORTCUTS */

            InitSemaphore(<P_LockSemaphore);

            NewList((struct List *)<P_LockList);
            NewList((struct List *)<P_EmptyList);

            return(TRUE);
        }

        LT_Exit();
        return(FALSE);
    }
}


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


/****** gtlayout.library/LT_Exit ******************************************
*
*   NAME
*    LT_Exit -- Clean up user interface allocations
*
*   SYNOPSIS
*    LT_Exit();
*
*    VOID LT_Exit(VOID);
*
*   FUNCTION
*    When you are finished with user interface creation and
*    do not not need the code any more you should call this
*    routine. It will free all the memory allocated by
*    LT_Init(), close libraries, etc.
*
*   INPUTS
*    none
*
*   RESULT
*    none
*
*   NOTES
*    This function is not present in the shared library, only
*    in the link library. You need not and cannot invoke it in
*    the shared library.
*
*   SEE ALSO
*    gtlayout.library/LT_Init
*
******************************************************************************
*
*/

VOID LIBENT
LT_Exit()
{
    if(SysBase && SysBase->LibNode.lib_Version >= 37)
    {
#ifdef DO_PICKSHORTCUTS
        FreeMem(LTP_Keys[0],512);
        LTP_Keys[0] = LTP_Keys[1] = NULL;
#endif

#ifdef DO_LEVEL_KIND
        if(LTP_LevelClass)
        {
            FreeClass(LTP_LevelClass);
            LTP_LevelClass = NULL;
        }
#endif    /* DO_LEVEL_KIND */

#if defined(DO_POPUP_KIND) && defined(DO_BOOPSI_KIND)
        if(LTP_PopupClass)
        {
            FreeClass(LTP_PopupClass);
            LTP_PopupClass = NULL;
        }
#endif    // DO_POPUP_KIND

#if defined(DO_TAB_KIND) && defined(DO_BOOPSI_KIND)
        if(LTP_TabClass)
        {
            FreeClass(LTP_TabClass);
            LTP_TabClass = NULL;
        }
#endif    // DO_TAB_KIND

        if(LTP_ImageClass)
        {
            FreeClass(LTP_ImageClass);
            LTP_ImageClass = NULL;
        }

        if(LTP_Locale)
        {
            CloseLocale(LTP_Locale);
            LTP_Locale = NULL;
        }

        CloseLibrary(LocaleBase);
        LocaleBase = NULL;

        CloseLibrary(KeymapBase);
        KeymapBase = NULL;

        CloseLibrary(GadToolsBase);
        GadToolsBase = NULL;

        CloseLibrary(UtilityBase);
        UtilityBase = NULL;

        CloseLibrary(GfxBase);
        GfxBase = NULL;

        CloseLibrary(IntuitionBase);
        IntuitionBase = NULL;
    }
}