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/*
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
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