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cppdef.h
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/******************************************************************************
Copyright (c) 2023 - present AinsleySnow
Copyright (c) 1993 - 2011 Daniel Stenberg
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
// there used to be some lines of code of using Emacs defination
// to find machine type, but I don't think we need that anymore
/*
* 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.
*
* (Is there any C compiler that doesn't support macros with arguments?)
* （Alas. Tears of the era.)
*
* 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.
*
* (...Or any host or target that totally ignores ASCII?)
* (Tears again.)
*
*/
// no longer needed to define true and false
// manually, since we have stdbool.h, and in the
// newest C23 standard we have the keywords true and false.
/*
* Define the HOST operating system. This is needed so that
* cpp can use appropriate filename conventions.
*/
/*
* 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
*
* 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.
*/
#define LINE_PREFIX "line"
/*
* 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).
*/
#define OK_CONCAT true
/*
* OK_DATE Predefines the compilation date if set true.
* Not permitted by the Nov. 12, 1984 Draft Standard.
*/
#define OK_DATE true
/*
*
* OK_SIZEOF Permits sizeof in #if preprocessor expressions.
* According to K&R V2 (page 232), this is not allowed.
*/
#define OK_SIZEOF true
/*
* 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.
*/
/*
* defaults
*/
#ifndef MSG_PREFIX
#define MSG_PREFIX "cpp: "
#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.
* [I *seems* to be the other way around, according to the code /OIS]
*/
#ifndef BIG_ENDIAN
#define BIG_ENDIAN false
#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
/*
* 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
/*
* OK_SIZEOF may be defined to allow sizeof(type) in #if expressions.
* Actually, it is none of the preprocessors business how large these
* things are, as they might be different with different compiler
* options. Also, according to K&R V2, page 232, it is nonstandard.
* This option was added in the PDC process, under no. *OIS*0.92*.
*/
#ifndef OK_SIZEOF
#define OK_SIZEOF false
#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 512
#endif
#ifndef NEXP
#define NEXP 128
#endif
#ifndef NINCLUDE
#define NINCLUDE 20
#endif
#ifndef NPARMWORK
#define NPARMWORK (NWORK * 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
#define ALERT '\007' /* '\a' is "Bell" */
#endif
#ifndef VT
#define VT '\013' /* Vertical Tab CTRL/K */
#endif
/*
* Functions can be declared/defined static to only become in the
* scope for functions of the same source file.
*/
#ifndef FILE_LOCAL
#define FILE_LOCAL static /* file-unique globals */
#endif
/*
* SBSIZE defines the number of hash-table slots for the symbol table.
*/
#ifndef SBSIZE
#define SBSIZE 64
#endif
#define VERSION_TEXT \
"Ginkgo C Preprocessor v0.0.1\n" \
"Copyright (C) by AinsleySnow 2023 - present\n" \
"based on Frexx C Preprocessor v1.5.1\n" \
"Copyright (C) by FrexxWare 1993 - 2002.\n" \
"Compiled " __DATE__ "\n"