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Fold trace status into the single hash table that's left.
Inline some macros/functions for speed.
So, this achieves the goal of one single lookup for macro/trace status,
which does speed up m4 in partial tracing situations somewhat.
This does also speed up m4 in large pushdef situations, since it no longer
has to lookup large chains of macros.

okay millert@

/*	$OpenBSD: mdef.h,v 1.28 2003/06/30 22:13:33 espie Exp $	*/
/*	$NetBSD: mdef.h,v 1.7 1996/01/13 23:25:27 pk Exp $	*/

/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ozan Yigit at York University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)mdef.h	8.1 (Berkeley) 6/6/93
 */

#ifdef __GNUC__
# define UNUSED	__attribute__((__unused__))
#else
# define UNUSED
#endif

#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 SELFTYPE	34
#define INDIRTYPE	35
#define BUILTINTYPE	36
#define PATSTYPE	37
#define FILENAMETYPE	38
#define LINETYPE	39
#define REGEXPTYPE	40
#define ESYSCMDTYPE	41
#define TRACEONTYPE	42
#define TRACEOFFTYPE	43

#define BUILTIN_MARKER	"__builtin_"
 
#define TYPEMASK	63	/* Keep bits really corresponding to a type. */
#define RECDEF		256	/* Pure recursive def, don't expand it */
#define NOARGS		512	/* builtin needs no args */
#define NEEDARGS	1024	/* mark builtin that need args with this */

/*
 * m4 special characters
 */
 
#define ARGFLAG         '$'
#define LPAREN          '('
#define RPAREN          ')'
#define LQUOTE          '`'
#define RQUOTE          '\''
#define COMMA           ','
#define SCOMMT          '#'
#define ECOMMT          '\n'

#ifdef msdos
#define system(str)	(-1)
#endif

/*
 * other important constants
 */

#define EOS             '\0'
#define MAXINP          10              /* maximum include files   	    */
#define MAXOUT          10              /* maximum # of diversions 	    */
#define BUFSIZE         4096            /* starting size of pushback buffer */
#define INITSTACKMAX    4096           	/* starting size of call stack      */
#define STRSPMAX        4096            /* starting size of string space    */
#define MAXTOK          512          	/* maximum chars in a tokn 	    */
#define HASHSIZE        199             /* maximum size of hashtab 	    */
#define MAXCCHARS	5		/* max size of comment/quote delim  */
 
#define ALL             1
#define TOP             0
 
#define TRUE            1
#define FALSE           0
#define cycle           for(;;)

/*
 * m4 data structures
 */
 
typedef struct ndblock *ndptr;
 
struct macro_definition {
	struct macro_definition *next;
	char		*defn;	/* definition..               */
	unsigned int	type;	/* type of the entry..        */
};


struct ndblock {			/* hashtable structure         */
	unsigned int 		builtin_type;
	unsigned int		trace_flags;
	struct macro_definition *d;
	char		name[1];	/* entry name..               */
};
 
typedef union {			/* stack structure */
	int	sfra;		/* frame entry  */
	char 	*sstr;		/* string entry */
} stae;

struct input_file {
	FILE 		*file;
	char 		*name;
	unsigned long 	lineno;
	unsigned long   synch_lineno;	/* used for -s */
	int 		c;
};

#define CURRENT_NAME	(infile[ilevel].name)
#define CURRENT_LINE	(infile[ilevel].lineno)
/*
 * macros for readibility and/or speed
 *
 *      gpbc()  - get a possibly pushed-back character
 *      pushf() - push a call frame entry onto stack
 *      pushs() - push a string pointer onto stack
 */
#define gpbc() 	 (bp > bufbase) ? *--bp : obtain_char(infile+ilevel)
#define pushf(x) 			\
	do {				\
		if (++sp == STACKMAX) 	\
			enlarge_stack();\
		mstack[sp].sfra = (x);	\
		sstack[sp] = 0; \
	} while (0)

#define pushs(x) 			\
	do {				\
		if (++sp == STACKMAX) 	\
			enlarge_stack();\
		mstack[sp].sstr = (x);	\
		sstack[sp] = 1; \
	} while (0)

#define pushs1(x) 			\
	do {				\
		if (++sp == STACKMAX) 	\
			enlarge_stack();\
		mstack[sp].sstr = (x);	\
		sstack[sp] = 0; \
	} while (0)

/*
 *	    .				   .
 *	|   .	|  <-- sp		|  .  |
 *	+-------+			+-----+
 *	| arg 3 ----------------------->| str |
 *	+-------+			|  .  |
 *	| arg 2 ---PREVEP-----+ 	   .
 *	+-------+	      |
 *	    .		      |		|     |
 *	+-------+	      | 	+-----+
 *	| plev	|  PARLEV     +-------->| str |
 *	+-------+			|  .  |
 *	| type	|  CALTYP		   .
 *	+-------+
 *	| prcf	---PREVFP--+
 *	+-------+  	   |
 *	|   .	|  PREVSP  |
 *	    .	   	   |
 *	+-------+	   |
 *	|	<----------+
 *	+-------+
 *
 */
#define PARLEV  (mstack[fp].sfra)
#define CALTYP  (mstack[fp-2].sfra)
#define TRACESTATUS (mstack[fp-1].sfra)
#define PREVEP	(mstack[fp+3].sstr)
#define PREVSP	(fp-4)
#define PREVFP	(mstack[fp-3].sfra)