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cppdef.h
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1991-09-04
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/*
Copyright (C) 1990 Texas Instruments Incorporated.
Permission is granted to any individual or institution to use, copy, modify,
and distribute this software, provided that this complete copyright and
permission notice is maintained, intact, in all copies and supporting
documentation.
Texas Instruments Incorporated provides this software "as is" without
express or implied warranty.
* S y s t e m D e p e n d e n t
* D e f i n i t i o n s f o r C P P
*
* Definitions in this file may be edited to configure CPP for particular
* host operating systems and target configurations.
*
* NOTE: cpp assumes it is compiled by a compiler that supports macros
* with arguments. If this is not the case (as for Decus C), #define
* nomacarg -- and provide function equivalents for all macros.
*
* cpp also assumes the host and target implement the Ascii character set.
* If this is not the case, you will have to do some editing here and there.
*
* Change History
* 19-Jan-90 DKM Support for MVS and EBCDIC character set
* 04-May-90 MJF Added predefined constant "sun"
* 16-Jun-91 GPD Fixed predefines for sun, pyr and i386 architectures
*/
#ifndef CPPDEFH
#define CPPDEFH
#ifdef EMACS
/* Use the Emacs config file to find out what type of machine */
#define NO_SHORTNAMES
#include "../src/config.h"
/* Convert Emacs's conventions for BIG_ENDIAN to cpp's convention. */
#ifdef BIG_ENDIAN
#undef BIG_ENDIAN
#define BIG_ENDIAN TRUE
#else /* not BIG_ENDIAN */
#define BIG_ENDIAN FALSE
#endif /* BIG_ENDIAN */
/* Emacs uses the names index and rindex and defines them as str(r)chr if nec;
cpp uses the opposite convention. Here we flush the macro definitions for
Emacs and add the ones cpp wants. */
#ifdef index
#undef index
#undef rindex
#else /* index is not defined as a macro */
#define strchr index
#define strrchr rindex
#endif /* index is not defined as a macro */
#define NBUFF 2048
#define NWORK 2048
#endif /* EMACS */
/*
* This redundant definition of TRUE and FALSE works around
* a limitation of Decus C.
*/
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
/*
* Define the HOST operating system. This is needed so that
* cpp can use appropriate filename conventions.
*/
#define SYS_UNKNOWN 0
#define SYS_UNIX 1
#define SYS_VMS 2
#define SYS_RSX 3
#define SYS_RT11 4
#define SYS_LATTICE 5
#define SYS_ONYX 6
#define SYS_68000 7
#define SYS_OS2 8
#define SYS_XENIX 9
#define SYS_MVS 10
#define SYS_AIX 11
/* Both ASCII and EBCDIC machines are supported */
#define ASCII 1
#define EBCDIC 2
#ifndef HOST
#ifdef unix
#define HOST SYS_UNIX
#else
#ifdef vms
#define HOST SYS_VMS
#else
#ifdef rsx
#define HOST SYS_RSX
#else
#ifdef rt11
#define HOST SYS_RT11
#else
#if defined(DOS) || defined(MSDOS)
#define HOST SYS_OS2
#else
#ifdef M_XENIX
#define HOST SYS_XENIX
#else
#ifdef SYS_OSVS
#define HOST SYS_MVS
#else
#if defined(_AIX)
#define HOST SYS_AIX
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#ifndef HOST
#define HOST SYS_UNKNOWN
#endif
/*
* We assume that the target is the same as the host system
*/
#ifndef TARGET
#define TARGET HOST
#endif
/*
* In order to predefine machine-dependent constants,
* several strings are defined here:
*
* MACHINE defines the target cpu (by name)
* SYSTEM defines the target operating system
* COMPILER defines the target compiler
* CHARSET character set used, ASCII or EBCDIC (defaults ASCII).
*
* The above may be #defined as "" if they are not wanted.
* They should not be #defined as NULL.
*
* LINE_PREFIX defines the # output line prefix, if not "line"
* This should be defined as "" if cpp is to replace
* the "standard" C pre-processor.
*
* FILE_LOCAL marks functions which are referenced only in the
* file they reside. Some C compilers allow these
* to be marked "static" even though they are referenced
* by "extern" statements elsewhere.
*
* OK_DOLLAR Should be set TRUE if $ is a valid alphabetic character
* in identifiers (default), or zero if $ is invalid.
* Default is TRUE.
*
* OK_CONCAT Should be set TRUE if ## may be used to concatenate
* tokens in macros (per the Ansi Draft Standard) or
* FALSE for old-style # processing (needed if cpp is
* to process assembler source code).
*
* OK_DATE Predefines the compilation date if set TRUE.
* Not permitted by the Nov. 12, 1984 Draft Standard.
*
* S_CHAR etc. Define the sizeof the basic TARGET machine word types.
* By default, sizes are set to the values for the HOST
* computer. If this is inappropriate, see the code in
* cpp3.c for details on what to change. Also, if you
* have a machine where sizeof (signed int) differs from
* sizeof (unsigned int), you will have to edit code and
* tables in cpp3.c (and extend the -S option definition.)
*
* CPP_LIBRARY May be defined if you have a site-specific include directory
* which is to be searched *before* the operating-system
* specific directories.
*/
#if TARGET == SYS_LATTICE
/*
* We assume the operating system is pcdos for the IBM-PC.
* We also assume the small model (just like the PDP-11)
*/
#define MACHINE "i8086"
#define SYSTEM "pcdos"
#endif
#if TARGET == SYS_ONYX
#define MACHINE "z8000"
#define SYSTEM "unix"
#endif
#if TARGET == SYS_VMS
#define MACHINE "vax"
#define SYSTEM "vms"
#define COMPILER "vax11c"
#endif
#if TARGET == SYS_RSX
#define MACHINE "pdp11"
#define SYSTEM "rsx"
#define COMPILER "decus"
#endif
#if TARGET == SYS_RT11
#define MACHINE "pdp11"
#define SYSTEM "rt11"
#define COMPILER "decus"
#endif
#if TARGET == SYS_XENIX
#define MACHINE "I80386"
#define SYSTEM "M_XENIX"
#define COMPILER "XENIXC"
#endif
#if TARGET == SYS_OS2
#define MACHINE "I80386"
#define SYSTEM "DOS"
#define COMPILER "IBMC2"
#endif
#if TARGET == SYS_MVS
#define MACHINE "IBM370"
#define SYSTEM "MVS"
#define COMPILER "SAS/C"
#define CHARSET EBCDIC
#endif
#if TARGET == SYS_AIX
#define MACHINE "RS6000"
#define SYSTEM "AIX"
#define COMPILER "IBMCC"
#endif
#if TARGET == SYS_68000
/*
* All three machine designators have been seen in various systems.
* Warning -- compilers differ as to sizeof (int). cpp3 assumes that
* sizeof (int) == 2
*/
#define MACHINE "M68000", "m68000", "m68k"
#define SYSTEM "unix"
#endif
#if TARGET == SYS_UNIX
#define SYSTEM "unix"
#ifdef pdp11
#define MACHINE "pdp11"
#endif
#ifdef vax
#define MACHINE "vax"
#endif
#ifdef sparc
#define MACHINE "sparc"
#endif
#ifdef mc68020
#define MACHINE "mc68020", "mc68000"
#endif
#ifdef sun
#define TARGET_ARCH "sun"
#endif
#ifdef pyr
#define MACHINE "pyr"
#endif
#ifdef i386
#define MACHINE "i386"
#endif
#endif
/*
* defaults
*/
#ifndef CHARSET
#define CHARSET ASCII
#endif
#ifndef MSG_PREFIX
#define MSG_PREFIX "cpp: "
#endif
#ifndef LINE_PREFIX
#ifdef decus
#define LINE_PREFIX ""
#else
#define LINE_PREFIX "line"
#endif
#endif
/* create a string that can be shoved on the preset symbols list
* so programs running this cpp can test for ASCII or EBCDIC too.
*/
#if CHARSET == EBCDIC
#define CH_SET "EBCDIC"
#else
#define CH_SET "ASCII"
#endif
/*
* OLD_PREPROCESSOR forces the definition of OK_DOLLAR, OK_CONCAT,
* COMMENT_INVISIBLE, and STRING_FORMAL to values appropriate for
* an old-style preprocessor.
*/
#if OLD_PREPROCESSOR
#define OK_DOLLAR FALSE
#define OK_CONCAT FALSE
#define COMMENT_INVISIBLE TRUE
#define STRING_FORMAL TRUE
#endif
/*
* RECURSION_LIMIT may be set to -1 to disable the macro recursion test.
*/
#ifndef RECURSION_LIMIT
#define RECURSION_LIMIT 1000
#endif
/*
* BITS_CHAR may be defined to set the number of bits per character.
* it is needed only for multi-byte character constants.
*/
#ifndef BITS_CHAR
#define BITS_CHAR 8
#endif
/*
* BIG_ENDIAN is set TRUE on machines (such as the IBM 360 series)
* where 'ab' stores 'a' in the high-bits and 'b' in the low-bits.
* It is set FALSE on machines (such as the PDP-11 and Vax-11)
* where 'ab' stores 'a' in the low-bits and 'b' in the high-bits.
* (Or is it the other way around?) -- Warning: BIG_ENDIAN code is untested.
*/
#ifndef BIG_ENDIAN
#if (HOST == SYS_MVS) || defined(i386)
#define BIG_ENDIAN TRUE /* Is this right??? */
#else
#define BIG_ENDIAN FALSE
#endif
#endif
/*
* COMMENT_INVISIBLE may be defined to allow "old-style" comment
* processing, whereby the comment becomes a zero-length token
* delimiter. This permitted tokens to be concatenated in macro
* expansions. This was removed from the Draft Ansi Standard.
*/
#ifndef COMMENT_INVISIBLE
#define COMMENT_INVISIBLE FALSE
#endif
/*
* STRING_FORMAL may be defined to allow recognition of macro parameters
* anywhere in replacement strings. This was removed from the Draft Ansi
* Standard and a limited recognition capability added.
*/
#ifndef STRING_FORMAL
#define STRING_FORMAL FALSE
#endif
/*
* OK_DOLLAR enables use of $ as a valid "letter" in identifiers.
* This is a permitted extension to the Ansi Standard and is required
* for e.g., VMS, RSX-11M, etc. It should be set FALSE if cpp is
* used to preprocess assembler source on Unix systems. OLD_PREPROCESSOR
* sets OK_DOLLAR FALSE for that reason.
*/
#ifndef OK_DOLLAR
#define OK_DOLLAR TRUE
#endif
/*
* OK_CONCAT enables (one possible implementation of) token concatenation.
* If cpp is used to preprocess Unix assembler source, this should be
* set FALSE as the concatenation character, #, is used by the assembler.
*/
#ifndef OK_CONCAT
#define OK_CONCAT TRUE
#endif
/*
* OK_DATE may be enabled to predefine today's date as a string
* at the start of each compilation. This is apparently not permitted
* by the Draft Ansi Standard.
*/
#ifndef OK_DATE
#define OK_DATE TRUE
#endif
/*
* Some common definitions.
*/
#ifndef DEBUG
#define DEBUG FALSE
#endif
/*
* The following definitions are used to allocate memory for
* work buffers. In general, they should not be modified
* by implementors.
*
* PAR_MAC The maximum number of #define parameters (31 per Standard)
* Note: we need another one for strings.
* NBUFF Input buffer size
* NWORK Work buffer size -- the longest macro
* must fit here after expansion.
* NEXP The nesting depth of #if expressions
* NINCLUDE The number of directories that may be specified
* on a per-system basis, or by the -I option.
* BLK_NEST The number of nested #if's permitted.
*/
#ifndef PAR_MAC
#define PAR_MAC (31 + 1)
#endif
#ifndef NBUFF
#define NBUFF 512
#endif
#ifndef NWORK
#define NWORK 4096
#endif
#ifndef NEXP
#define NEXP 128
#endif
#ifndef NINCLUDE
#define NINCLUDE 16
#endif
#ifndef NPARMWORK
#define NPARMWORK (NBUFF * 2)
#endif
#ifndef BLK_NEST
#define BLK_NEST 32
#endif
/*
* Some special constants. These may need to be changed if cpp
* is ported to a wierd machine.
*
* NOTE: if cpp is run on a non-ascii machine, ALERT and VT may
* need to be changed. They are used to implement the proposed
* ANSI standard C control characters '\a' and '\v' only.
* DEL is used to tag macro tokens to prevent #define foo foo
* from looping. Note that we don't try to prevent more elaborate
* #define loops from occurring.
*/
#ifndef ALERT
# if CHARSET == EBCDIC
# define ALERT '\057' /* EBCDIC '\a' Bell */
# else
# define ALERT '\007' /* ASCII '\a' Bell */
#endif
#endif
#ifndef VT
#define VT '\013' /* Vertical Tab CTRL/K */
#endif
#ifndef FILE_LOCAL
#ifdef decus
#define FILE_LOCAL static
#else
#ifdef vax11c
#define FILE_LOCAL static
#else
#define FILE_LOCAL /* Others are global */
#endif
#endif
#endif
#endif