/*

    File:       Optimization.h

    Contains:   Defines that let you make MoreFiles code more efficient.

    Version:    MoreFiles

    Copyright:  © 1992-2001 by Apple Computer, Inc., all rights reserved.

    You may incorporate this sample code into your applications without

    restriction, though the sample code has been provided "AS IS" and the

    responsibility for its operation is 100% yours.  However, what you are

    not permitted to do is to redistribute the source as "DSC Sample 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 Code, but that you've made changes.

    File Ownership:

        DRI:                Apple Macintosh Developer Technical Support

        Other Contact:      Apple Macintosh Developer Technical Support

                            <http://developer.apple.com/bugreporter/>

        Technology:         DTS Sample Code

    Writers:

        (JL)    Jim Luther

    Change History (most recent first):

         <1>      2/7/01    JL      first checked in

*/

/*

    The Optimization changes to MoreFiles source and header files, along with

    this file and OptimizationEnd.h, let you optimize the code produced

    by MoreFiles in several ways.

    1 -- MoreFiles contains extra code so that many routines can run under

    Mac OS systems back to System 6. If your program requires a specific

    version of Mac OS and your program checks for that version before

    calling MoreFiles routines, then you can remove a lot of compatibility

    code by defining one of the following to 1:

        __MACOSSEVENFIVEONEORLATER  // assume Mac OS 7.5.1 or later

        __MACOSSEVENFIVEORLATER     // assume Mac OS 7.5 or later

        __MACOSSEVENORLATER         // assume Mac OS 7.0 or later

    If you're compiling 68K code, the default is to include all compatibility code.

    If you're compiling PowerPC code (TARGET_RT_MAC_CFM), the default is __MACOSSEVENORLATER

    If you're compiling for Carbon code (TARGET_API_MAC_CARBON), the default is __MACOSSEVENFIVEONEORLATER

    2 -- You may disable Pascal calling conventions in all MoreFiles routines

    except for system callbacks that require Pascal calling conventions.

    This will make 68K C programs both smaller and faster. 

    (PowerPC compilers ignore pascal calling conventions.)

    Just define __WANTPASCALELIMINATION to be 1 to turn this optimization on

    when building MoreFiles for use from C programs (you'll need to keep

    Pascal calling conventions when linking MoreFiles routines with Pascal

    programs).

    3 -- If Metrowerks compiler is used, "#pragma internal on" may help produce

    better code. However, this option can also cause problems if you're

    trying to build MoreFiles as a shared library, so it is by default not used.

    Just define __USEPRAGMAINTERNAL to be 1 to turn this optimization on.

    Original changes supplied by Fabrizio Oddone

*/

#include <ConditionalMacros.h>

// if we're compiling for Carbon, then we're running on Mac OS 8.1 or later

#ifndef __MACOSSEVENFIVEONEORLATER

    #define __MACOSSEVENFIVEONEORLATER TARGET_API_MAC_CARBON

#endif

#ifndef __MACOSSEVENFIVEORLATER

    #define __MACOSSEVENFIVEORLATER __MACOSSEVENFIVEONEORLATER

#endif

#ifndef __MACOSSEVENORLATER

    #if TARGET_RT_MAC_CFM

        #define __MACOSSEVENORLATER 1

    #else

        #define __MACOSSEVENORLATER __MACOSSEVENFIVEORLATER

    #endif

#endif

#ifndef __WANTPASCALELIMINATION

    #define __WANTPASCALELIMINATION 0

#endif

#if __WANTPASCALELIMINATION

    #define pascal  

#endif

#ifndef __USEPRAGMAINTERNAL

    #define __USEPRAGMAINTERNAL 0

#endif

#if __USEPRAGMAINTERNAL

    #if defined(__MWERKS__)

        #pragma internal on

    #endif

#endif