Minix1.5/commands/m4/mdef.h
/*
* mdef.h
* Facility: m4 macro processor
* by: oz
*/
#ifndef unix
#define unix 0
#endif
#ifndef vms
#define vms 0
#endif
#if vms
#include stdio
#include ctype
#include signal
#else
#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#endif
/*
*
* m4 constants..
*
*/
#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 STATIC 128
/*
* m4 special characters
*/
#define ARGFLAG '$'
#define LPAREN '('
#define RPAREN ')'
#define LQUOTE '`'
#define RQUOTE '\''
#define COMMA ','
#define SCOMMT '#'
#define ECOMMT '\n'
/*
* definitions of diversion files. If the name of
* the file is changed, adjust UNIQUE to point to the
* wildcard (*) character in the filename.
*/
#if unix
#define DIVNAM "/tmp/m4*XXXXXX" /* unix diversion files */
#define UNIQUE 7 /* unique char location */
#else
#if vms
#define DIVNAM "sys$login:m4*XXXXXX" /* vms diversion files */
#define UNIQUE 12 /* unique char location */
#else
#define DIVNAM "\M4*XXXXXX" /* msdos diversion files */
#define UNIQUE 3 /* unique char location */
#endif
#endif
/*
* other important constants
*/
#define EOS (char) 0
#define MAXINP 10 /* maximum include files */
#define MAXOUT 10 /* maximum # of diversions */
#define MAXSTR 512 /* maximum size of string */
#define BUFSIZE 4096 /* size of pushback buffer */
#define STACKMAX 1024 /* size of call stack */
#define STRSPMAX 4096 /* size of string space */
#define MAXTOK MAXSTR /* maximum chars in a tokn */
#define HASHSIZE 199 /* maximum size of hashtab */
#define ALL 1
#define TOP 0
#define TRUE 1
#define FALSE 0
#define cycle for(;;)
#ifdef VOID
#define void int /* define if void is void. */
#endif
/*
* m4 data structures
*/
typedef struct ndblock *ndptr;
struct ndblock { /* hastable structure */
char *name; /* entry name.. */
char *defn; /* definition.. */
int type; /* type of the entry.. */
ndptr nxtptr; /* link to next entry.. */
};
#define nil ((ndptr) 0)
struct keyblk {
char *knam; /* keyword name */
int ktyp; /* keyword type */
};
typedef union { /* stack structure */
int sfra; /* frame entry */
char *sstr; /* string entry */
} stae;
/*
* 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 > buf) ? *--bp : getc(infile[ilevel])
#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)