/*

    File:       MoreOSLTokens.c

    Contains:   Token definition for MoreOSL.

    Written by: Quinn

    Copyright:  Copyright © 2000 by Apple Computer, Inc., all rights reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

         <2>     20/3/00    Quinn   Added InitPropertyMOSLTokenFromOtherProperty.  Fixed unitialised

                                    "err" in CompareMOSLTokens.

         <1>      6/3/00    Quinn   First checked in.

*/

/////////////////////////////////////////////////////////////////

// MoreIsBetter Setup

#include "MoreSetup.h"

// Mac OS Interfaces

#include <AppleEvents.h>

#include <AERegistry.h>

// MIB Prototypes

#include "MoreAppleEvents.h"

#include "MoreBBLog.h"

#include "MoreOSL.h"                // for error codes

// Our Prototypes

#include "MoreOSLTokens.h"

/////////////////////////////////////////////////////////////////

#if MORE_DEBUG

    extern pascal void BBLogMOSLToken(ConstStr255Param tag, const MOSLToken *tok)

        // See comment in header file.

    {

        OSStatus err;

        AEDesc   tmpDesc;

        MoreAssertQ(tag != nil);

        MoreAssertQ(tok != nil);

        err = AECreateDesc(tok->tokType, tok, sizeof(*tok), &tmpDesc);

        if (err == noErr) {

            BBLogDesc(tag, &tmpDesc);

            MoreAEDisposeDesc(&tmpDesc);

        }

        MoreAssertQ(err == noErr);

    }

#endif

extern pascal void InitObjectMOSLToken(MOSLToken *tok, DescType tokType, void *tokData)

    // See comment in header file.

{

    MoreAssertQ(tok != nil);

    tok->tokType     = tokType;

    tok->tokObjType  = tokType;

    tok->tokPropName = (OSType) 0;

    tok->tokData     = tokData;

}

extern pascal void InitPropertyMOSLToken(MOSLToken *tok, DescType tokObjType, DescType tokPropName, void *tokData)

    // See comment in header file.

{

    MoreAssertQ(tok != nil);

    tok->tokType     = typeProperty;

    tok->tokObjType  = tokObjType;

    tok->tokPropName = tokPropName;

    tok->tokData     = tokData;

}

extern pascal void     InitPropertyMOSLTokenFromContainer(MOSLToken *tok, const MOSLToken *containerTok, DescType tokPropName)

    // See comment in header file.

{

    MoreAssertQ(tok != nil);

    MoreAssertQ(containerTok != nil);

    MoreAssertQ(containerTok->tokType != typeProperty);

    *tok = *containerTok;

    tok->tokType     = typeProperty;

    tok->tokPropName = tokPropName;

}

extern pascal void     InitPropertyMOSLTokenFromOtherProperty(MOSLToken *tok, const MOSLToken *propertyTok, DescType tokPropName)

    // See comment in header file.

{

    MoreAssertQ(tok != nil);

    MoreAssertQ(propertyTok != nil);

    MoreAssertQ(propertyTok->tokType == typeProperty);

    *tok = *propertyTok;

    tok->tokType     = typeProperty;

    tok->tokPropName = tokPropName;

}

extern pascal OSStatus MOSLTokenToDesc(const MOSLToken *tok, AEDesc *desc)

    // See comment in header file.

{

    OSStatus err;

    MoreAssertQ(tok  != nil);

    MoreAssertQ(desc != nil);

    MoreAENullDesc(desc);

    err = AECreateDesc(tok->tokType, tok, sizeof(*tok), desc);

    return err;

}

extern pascal void DescToMOSLToken(const AEDesc *tokDesc, MOSLToken *tok)

    // See comment in header file.

{

    OSStatus junk;

    MoreAssertQ(tok     != nil);

    MoreAssertQ(tokDesc != nil);

    if (tokDesc->descriptorType == typeNull) {

        InitObjectMOSLToken(tok, cApplication, nil);

    } else {

        MoreAssertQ(AEGetDescDataSize(tokDesc) == sizeof(*tok));

        junk = AEGetDescData(tokDesc, tok, sizeof(*tok));

        MoreAssertQ(junk == noErr);

        MoreAssertQ(tokDesc->descriptorType == tok->tokType);

    }

}

extern pascal OSStatus CompareMOSLTokens(DescType oper, const MOSLToken *tok1, const MOSLToken *tok2, Boolean *result)

    // See comment in header file.

{

    OSStatus err;

    MoreAssertQ(tok1   != nil);

    MoreAssertQ(tok2   != nil);

    MoreAssertQ(result != nil);

    err = noErr;    

    switch (oper) {

        case kAEEquals:

            *result = (tok1->tokObjType  == tok2->tokObjType      )

                        && (tok1->tokPropName == tok2->tokPropName)

                        && (tok1->tokData     == tok2->tokData    );

            break;

        case kAEGreaterThanEquals:

        case kAEGreaterThan:

        case kAELessThanEquals:

        case kAELessThan:

            err = kMOSLCantRelateObjectsErr;

            break;

        default:

            MoreAssertQ(false);

            err = kMOSLUnrecognisedOperatorErr;

            break;

    }

    return err;

}