NetBSD/usr.bin/m4/mdef.h

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/* Header : mdef.h
Author : Ozan Yigit
Updated: 4 May 1992
$Id: mdef.h,v 1.3 1993/08/02 17:54:44 mycroft Exp $
*/
#ifndef MACRTYPE
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#ifndef unix
#define unix 0
#endif
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#ifndef vms
#define vms 0
#endif
#include <stdio.h>
#include <signal.h>
#ifdef __STDC__
#include <string.h>
#else
#ifdef VOID
#define void int
#endif
extern int strlen();
extern int strcmp();
extern void memcpy();
#endif
/* m4 constants */
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#define MACRTYPE 1
#define DEFITYPE 2
#define EXPRTYPE 3
#define SUBSTYPE 4
#define IFELTYPE 5
#define LENGTYPE 6
#define CHNQTYPE 7
#define SYSCTYPE 8
#define UNDFTYPE 9
#define INCLTYPE 10
#define SINCTYPE 11
#define PASTTYPE 12
#define SPASTYPE 13
#define INCRTYPE 14
#define IFDFTYPE 15
#define PUSDTYPE 16
#define POPDTYPE 17
#define SHIFTYPE 18
#define DECRTYPE 19
#define DIVRTYPE 20
#define UNDVTYPE 21
#define DIVNTYPE 22
#define MKTMTYPE 23
#define ERRPTYPE 24
#define M4WRTYPE 25
#define TRNLTYPE 26
#define DNLNTYPE 27
#define DUMPTYPE 28
#define CHNCTYPE 29
#define INDXTYPE 30
#define SYSVTYPE 31
#define EXITTYPE 32
#define DEFNTYPE 33
#define LINETYPE 34
#define TRIMTYPE 35
#define TLITTYPE 36
#define DEFQTYPE 37 /* defquote */
#define QUTRTYPE 38 /* quoter thus defined */
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#define STATIC 128
/* m4 special characters */
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#define ARGFLAG '$'
#define LPAREN '('
#define RPAREN ')'
#define LQUOTE '`'
#define RQUOTE '\''
#define VQUOTE ('V'&(' '- 1))
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#define COMMA ','
#define SCOMMT '#'
#define ECOMMT '\n'
/*
* other important constants
*/
#define EOS (char) 0
#define MAXINP 10 /* maximum include files */
#define MAXOUT 10 /* maximum # of diversions */
#ifdef SMALL
#define MAXSTR 512 /* maximum size of string */
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#define BUFSIZE 4096 /* size of pushback buffer */
#define STACKMAX 1024 /* size of call stack */
#define STRSPMAX 4096 /* size of string space */
#define HASHSIZE 199 /* maximum size of hashtab */
#else
#define MAXSTR 1024 /* maximum size of string */
#define BUFSIZE 8192 /* size of pushback buffer */
#define STACKMAX 2048 /* size of call stack */
#define STRSPMAX 8192 /* size of string space */
#define HASHSIZE 509 /* maximum size of hashtab */
#endif
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#define MAXTOK MAXSTR /* maximum chars in a tokn */
#define ALL 1
#define TOP 0
#define TRUE 1
#define FALSE 0
/* m4 data structures */
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typedef struct ndblock *ndptr;
struct ndblock /* hashtable structure */
{
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char *name; /* entry name.. */
char *defn; /* definition.. */
int type; /* type of the entry.. */
ndptr nxtptr; /* link to next entry.. */
};
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#define nil ((ndptr) 0)
typedef union /* stack structure */
{ int sfra; /* frame entry */
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char *sstr; /* string entry */
} stae;
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/*
* macros for readibility and/or speed
*
* gpbc() - get a possibly pushed-back character
* min() - select the minimum of two elements
* pushf() - push a call frame entry onto stack
* pushs() - push a string pointer onto stack
*/
#define gpbc() bp == bb ? getc(infile[ilevel]) : *--bp
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#define min(x,y) ((x > y) ? y : x)
#define pushf(x) if (sp < STACKMAX) mstack[++sp].sfra = (x)
#define pushs(x) if (sp < STACKMAX) mstack[++sp].sstr = (x)
/*
* . .
* | . | <-- sp | . |
* +-------+ +-----+
* | arg 3 ----------------------->| str |
* +-------+ | . |
* | arg 2 ---PREVEP-----+ .
* +-------+ |
* . | | |
* +-------+ | +-----+
* | plev | PARLEV +-------->| str |
* +-------+ | . |
* | type | CALTYP .
* +-------+
* | prcf ---PREVFP--+
* +-------+ |
* | . | PREVSP |
* . |
* +-------+ |
* | <----------+
* +-------+
*
*/
#define PARLEV (mstack[fp].sfra)
#define CALTYP (mstack[fp-1].sfra)
#define PREVEP (mstack[fp+3].sstr)
#define PREVSP (fp-3)
#define PREVFP (mstack[fp-2].sfra)
#endif