usr/src/old/as.vax/asscan2.c

/*
 *	Copyright (c) 1982 Regents of the University of California
 */
#ifndef lint
static char sccsid[] = "@(#)asscan2.c 4.13 %G%";
#endif not lint

#include "asscanl.h"

static	inttoktype	oval = NL;
#define	ASINBUFSIZ	4096
char	inbufunget[8];
char	inbuffer[ASINBUFSIZ];
char	*Ginbufptr = inbuffer;
int	Ginbufcnt = 0;

fillinbuffer()
{
		int	nread;
	static	int	hadeof;
		int	goal;
		int	got;

	nread = 0;
	if (hadeof == 0){
		goal = sizeof(inbuffer);
		do {
			got = read(stdin->_file, inbuffer + nread, goal);
			if (got == 0)
				hadeof = 1;
			if (got <= 0)
				break;
			nread += got;
			goal -= got;
		} while (goal);
	}
	/*
	 *	getchar assumes that Ginbufcnt and Ginbufptr
	 *	are adjusted as if one character has been removed
	 *	from the input.
	 */
	if (nread == 0){
		inbuffer[0] = EOFCHAR;
		nread = 1;
	}
	Ginbufcnt = nread - 1;
	Ginbufptr = inbuffer + 1;
}

scan_dot_s(bufferbox)
	struct tokbufdesc *bufferbox;
{
	reg	char	*inbufptr;
	reg	int	inbufcnt;
	reg	int	ryylval;	/* local copy of lexical value */
	extern	int	yylval;		/* global copy of lexical value */
	reg	int	val;		/* the value returned */
		int	i;		/* simple counter */
	reg	char	*rcp;
		int	ch;		/* treated as a character */
		int	ch1;		/* shadow value */
		struct 	symtab	*op;
		ptrall	lgbackpatch;	/* where to stuff a string length */
	reg	ptrall	bufptr;		/* where to stuff tokens */
		ptrall	bufub;		/* where not to stuff tokens */
		long	intval;		/* value of int */
		int	linescrossed;	/* when doing strings and comments */
		struct	Opcode		opstruct;
	reg	int	strlg;		/* the length of a string */

	(bytetoktype *)bufptr = (bytetoktype *) & (bufferbox->toks[0]);
	(bytetoktype *)bufub = &(bufferbox->toks[AVAILTOKS]);

	MEMTOREGBUF;
	if (newfflag){
		newfflag = 0;
		ryylval = (int)savestr(newfname, strlen(newfname)+1, STR_BOTH);

		ptoken(bufptr, IFILE);
		ptoken(bufptr, STRING);
		pptr(bufptr, ryylval);

		ptoken(bufptr, ILINENO);
		ptoken(bufptr, INT);
		pint(bufptr,  1);
	}

	while (bufptr < bufub){
   loop:
        switch(ryylval = (type+1)[ch = getchar()]) {
	case SCANEOF:
	endoffile: ;
		inbufptr = 0;
		ptoken(bufptr, PARSEEOF);
		goto done;

	case DIV:		/*process C style comments*/
		if ( (ch = getchar()) == '*') {  /*comment prelude*/
			int	incomment;
			linescrossed = 0;
			incomment = 1;
			ch = getchar();	/*skip over the * */
			while(incomment){
				switch(ch){
				case '*':
					ch = getchar();
					incomment = (ch != '/');
					break;
				case '\n':
					scanlineno++;
					linescrossed++;
					ch = getchar();
					break;
				case EOFCHAR:
					goto endoffile;
				default:
					ch = getchar();
					break;
				}
			}
			val = ILINESKIP;
			ryylval = linescrossed;
			goto ret;
		} else {	/*just an ordinary DIV*/
			ungetc(ch);
			val = ryylval = DIV;
			goto ret;
		}
	case SH:
		if (oval == NL){
			/*
			 *	Attempt to recognize a C preprocessor
			 *	style comment '^#[ \t]*[0-9]*[ \t]*".*"
			 */
			ch = getchar();	/*bump the #*/
			while (INCHARSET(ch, SPACE))
				ch = getchar();/*bump white */
			if (INCHARSET(ch, DIGIT)){
				intval = 0;
				while(INCHARSET(ch, DIGIT)){
					intval = intval*10 + ch - '0';
					ch = getchar();
				}
				while (INCHARSET(ch, SPACE))
					ch = getchar();
				if (ch == '"'){
					ptoken(bufptr, ILINENO);
					ptoken(bufptr, INT);
					pint(bufptr, intval - 1);
					ptoken(bufptr, IFILE);
					/*
					 *	The '"' has already been
					 *	munched
					 *
					 *	eatstr will not eat
					 *	the trailing \n, so
					 *	it is given to the parser
					 *	and counted.
					 */
					goto eatstr;
				}
			}
		}
		/*
		 *	Well, its just an ordinary decadent comment
		 */
		while ((ch != '\n') && (ch != EOFCHAR))
			ch = getchar();
		if (ch == EOFCHAR)
			goto endoffile;
		val = ryylval = oval = NL;
		scanlineno++;
		goto ret;

	case NL:
		scanlineno++;
		val = ryylval;
		goto ret;

	case SP:
		oval = SP;	/*invalidate ^# meta comments*/
		goto loop;

	case REGOP:		/* % , could be used as modulo, or register*/
		ch = getchar();
		if (INCHARSET(ch, DIGIT)){
			ryylval = ch-'0';
			if (ch=='1') {
				if (INCHARSET( (ch = getchar()), REGDIGIT))
					ryylval = 10+ch-'0';
				else
					ungetc(ch);
			}
			/*
			 *	God only knows what the original author
			 *	wanted this undocumented feature to
			 *	do.
			 *		%5++ is really  r7
			 */
			while(INCHARSET( (ch = getchar()), SIGN)) {
				if (ch=='+')
					ryylval++;
				else
					ryylval--;
			}
			ungetc(ch);
			val = REG;
		} else {
			ungetc(ch);
			val = REGOP;
		}
		goto ret;

	case ALPH:
		ch1 = ch;
		if (INCHARSET(ch, SZSPECBEGIN)){
			if( (ch = getchar()) == '`' || ch == '^'){
				ch1 |= 0100;	/*convert to lower*/
				switch(ch1){
				case 'b':	ryylval = 1;	break;
				case 'w':	ryylval = 2;	break;
				case 'l':	ryylval = 4;	break;
				default:	ryylval = d124;	break;
				}
				val = SIZESPEC;
				goto ret;
			} else {
				ungetc(ch);
				ch = ch1;	/*restore first character*/
			}
		}
		rcp = yytext;
		do {
			if (rcp < &yytext[NCPName])
				*rcp++ = ch;
		} while (INCHARSET ( (ch = getchar()), ALPHA | DIGIT));
		*rcp = '\0';
		while (INCHARSET(ch, SPACE))
			ch = getchar();
		ungetc(ch);

		switch((op = *lookup(1))->s_tag){
		case 0:
		case LABELID:
			/*
			 *	Its a name... (Labels are subsets of name)
			 */
			ryylval = (int)op;
			val = NAME;
			break;
		case INST0:
		case INSTn:
		case IJXXX:
			opstruct.Op_popcode = ( (struct instab *)op)->i_popcode;
			opstruct.Op_eopcode = ( (struct instab *)op)->i_eopcode;
			val = op->s_tag;
			break;
		default:
			ryylval = ( (struct instab *)op)->i_popcode;
			val = op->s_tag;
			break;
		}
		goto ret;

	case DIG:
		/*
		 *	restore local inbufptr and inbufcnt
		 */
		REGTOMEMBUF;
		val = number(ch);
		MEMTOREGBUF;
		/*
		 *	yylval or yybignum has been stuffed as a side
		 *	effect to number(); get the global yylval
		 *	into our fast local copy in case it was an INT.
		 */
		ryylval = yylval;
		goto ret;

	case LSH:
	case RSH:
		/*
		 *	We allow the C style operators
		 *	<< and >>, as well as < and >
		 */
		if ( (ch1 = getchar()) != ch)
			ungetc(ch1);
		val = ryylval;
		goto ret;

	case MINUS:
		if ( (ch = getchar()) =='(')
			ryylval=val=MP;
		else {
			ungetc(ch);
			val=MINUS;
		}
		goto ret;

	case SQ:
		if ((ryylval = getchar()) == '\n')
			scanlineno++;		/*not entirely correct*/
		val = INT;
		goto ret;

	case DQ:
	   eatstr:
		linescrossed = 0;
		for (strlg = 0; /*VOID*/; strlg++){
		    switch(ch = getchar()){
		    case '"':
			goto tailDQ;
		    default:
		    stuff:
			putc(ch, strfile);
			break;
		    case '\n':
			yywarning("New line in a string constant");
			scanlineno++;
			linescrossed++;
			ch = getchar();
			switch(ch){
			case EOFCHAR:
				putc('\n', strfile);
				ungetc(EOFCHAR);
				goto tailDQ;
			default:
				ungetc(ch);
				ch = '\n';
				goto stuff;
			}
			break;

		    case '\\':
			ch = getchar();		/*skip the '\\'*/
			if ( INCHARSET(ch, BSESCAPE)){
				switch (ch){
				  case 'b':  ch = '\b'; goto stuff;
				  case 'f':  ch = '\f'; goto stuff;
				  case 'n':  ch = '\n'; goto stuff;
				  case 'r':  ch = '\r'; goto stuff;
				  case 't':  ch = '\t'; goto stuff;
				}
			}
			if ( !(INCHARSET(ch, OCTDIGIT)) )
				goto stuff;
			i = 0;
			intval = 0;
			while ( (i < 3) && (INCHARSET(ch, OCTDIGIT))){
				i++;
				intval <<= 3;
				intval += ch - '0';
				ch = getchar();
			}
			ungetc(ch);
			ch = (char)intval;
			goto stuff;
		    }
		}
	tailDQ: ;
		/*
		 *	account for any lines that were crossed
		 */
		if (linescrossed){
			ptoken(bufptr, ILINESKIP);
			pint(bufptr, linescrossed);
		}
		/*
		 *	Cheat: append a trailing null to the string
		 *	and then adjust the string length to ignore
		 *	the trailing null.  If any STRING client requires
		 *	the trailing null, the client can just change STRLEN
		 */
		putc(0, strfile);
		ryylval = (int)savestr((char *)0, strlg + 1, STR_FILE);
		val = STRING;
		((struct strdesc *)ryylval)->sd_strlen -= 1;
		goto ret;

	case BADCHAR:
		linescrossed = lineno;
		lineno = scanlineno;
		yyerror("Illegal character mapped: %d, char read:(octal) %o",
			ryylval, ch);
		lineno = linescrossed;
		val = BADCHAR;
		goto ret;

	default:
		val = ryylval;
		goto ret;
	}	/*end of the switch*/
	/*
	 *	here with one token, so stuff it
	 */
   ret:
	oval = val;
	ptoken(bufptr, val);
	switch(val){
		case	ILINESKIP:
				pint(bufptr, ryylval);
				break;
		case	SIZESPEC:
				pchar(bufptr, ryylval);
				break;
		case	BFINT:	plong(bufptr, ryylval);
				break;
		case	INT:	plong(bufptr, ryylval);
				break;
		case 	BIGNUM:	pnumber(bufptr, yybignum);
				break;
		case	STRING:	pptr(bufptr, (int)(char *)ryylval);
				break;
		case	NAME:	pptr(bufptr, (int)(struct symtab *)ryylval);
				break;
		case	REG:	pchar(bufptr, ryylval);
				break;
		case	INST0:
		case	INSTn:
				popcode(bufptr, opstruct);
				break;
		case 	IJXXX:
				popcode(bufptr, opstruct);
				pptr(bufptr, (int)(struct symtab *)symalloc());
				break;
		case	ISTAB:
		case	ISTABSTR:
		case	ISTABNONE:
		case	ISTABDOT:
		case	IALIGN:
				pptr(bufptr, (int)(struct symtab *)symalloc());
				break;
	/*
	 *	default:
	 */
	 }
	 builtval: ;
   }			/*end of the while to stuff the buffer*/
   done:
	bufferbox->tok_count = (bytetoktype *)bufptr - &(bufferbox->toks[0]);
	/*
	 *	This is a real kludge:
	 *
	 *	We put the last token in the buffer to be  a MINUS
	 *	symbol.  This last token will never be picked up
	 *	in the normal way, but can be looked at during
	 *	a peekahead look that the short circuit expression
	 *	evaluator uses to see if an expression is complicated.
	 *
	 *	Consider the following situation:
	 *
	 *	.word	45		+	47
	 *        buffer 1      |  buffer 0
	 *	the peekahead would want to look across the buffer,
	 *	but will look in the buffer end zone, see the minus, and
	 *	fail.
	 */
	ptoken(bufptr, MINUS);
	REGTOMEMBUF;
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1982 Regents of the University of California
	3	*/
	4	#ifndef lint
	5	static char sccsid[] = "@(#)asscan2.c 4.13 %G%";
	6	#endif not lint
	7
	8	#include "asscanl.h"
	9
	10	static inttoktype oval = NL;
	11	#define ASINBUFSIZ 4096
	12	char inbufunget[8];
	13	char inbuffer[ASINBUFSIZ];
	14	char *Ginbufptr = inbuffer;
	15	int Ginbufcnt = 0;
	16
	17	fillinbuffer()
	18	{
	19	int nread;
	20	static int hadeof;
	21	int goal;
	22	int got;
	23
	24	nread = 0;
	25	if (hadeof == 0){
	26	goal = sizeof(inbuffer);
	27	do {
	28	got = read(stdin->_file, inbuffer + nread, goal);
	29	if (got == 0)
	30	hadeof = 1;
	31	if (got <= 0)
	32	break;
	33	nread += got;
	34	goal -= got;
	35	} while (goal);
	36	}
	37	/*
	38	* getchar assumes that Ginbufcnt and Ginbufptr
	39	* are adjusted as if one character has been removed
	40	* from the input.
	41	*/
	42	if (nread == 0){
	43	inbuffer[0] = EOFCHAR;
	44	nread = 1;
	45	}
	46	Ginbufcnt = nread - 1;
	47	Ginbufptr = inbuffer + 1;
	48	}
	49
	50	scan_dot_s(bufferbox)
	51	struct tokbufdesc *bufferbox;
	52	{
	53	reg char *inbufptr;
	54	reg int inbufcnt;
	55	reg int ryylval; /* local copy of lexical value */
	56	extern int yylval; /* global copy of lexical value */
	57	reg int val; /* the value returned */
	58	int i; /* simple counter */
	59	reg char *rcp;
	60	int ch; /* treated as a character */
	61	int ch1; /* shadow value */
	62	struct symtab *op;
	63	ptrall lgbackpatch; /* where to stuff a string length */
	64	reg ptrall bufptr; /* where to stuff tokens */
	65	ptrall bufub; /* where not to stuff tokens */
	66	long intval; /* value of int */
	67	int linescrossed; /* when doing strings and comments */
	68	struct Opcode opstruct;
	69	reg int strlg; /* the length of a string */
	70
	71	(bytetoktype )bufptr = (bytetoktype ) & (bufferbox->toks[0]);
	72	(bytetoktype *)bufub = &(bufferbox->toks[AVAILTOKS]);
	73
	74	MEMTOREGBUF;
	75	if (newfflag){
	76	newfflag = 0;
	77	ryylval = (int)savestr(newfname, strlen(newfname)+1, STR_BOTH);
	78
	79	ptoken(bufptr, IFILE);
	80	ptoken(bufptr, STRING);
	81	pptr(bufptr, ryylval);
	82
	83	ptoken(bufptr, ILINENO);
	84	ptoken(bufptr, INT);
	85	pint(bufptr, 1);
	86	}
	87
	88	while (bufptr < bufub){
	89	loop:
	90	switch(ryylval = (type+1)[ch = getchar()]) {
	91	case SCANEOF:
	92	endoffile: ;
	93	inbufptr = 0;
	94	ptoken(bufptr, PARSEEOF);
	95	goto done;
	96
	97	case DIV: /process C style comments/
	98	if ( (ch = getchar()) == '') { /comment prelude*/
	99	int incomment;
	100	linescrossed = 0;
	101	incomment = 1;
	102	ch = getchar(); /skip over the */
	103	while(incomment){
	104	switch(ch){
	105	case '*':
	106	ch = getchar();
	107	incomment = (ch != '/');
	108	break;
	109	case '\n':
	110	scanlineno++;
	111	linescrossed++;
	112	ch = getchar();
	113	break;
	114	case EOFCHAR:
	115	goto endoffile;
	116	default:
	117	ch = getchar();
	118	break;
	119	}
	120	}
	121	val = ILINESKIP;
	122	ryylval = linescrossed;
	123	goto ret;
	124	} else { /just an ordinary DIV/
	125	ungetc(ch);
	126	val = ryylval = DIV;
	127	goto ret;
	128	}
	129	case SH:
	130	if (oval == NL){
	131	/*
	132	* Attempt to recognize a C preprocessor
	133	* style comment '^#[ \t][0-9][ \t]"."
	134	*/
	135	ch = getchar(); /bump the #/
	136	while (INCHARSET(ch, SPACE))
	137	ch = getchar();/bump white /
	138	if (INCHARSET(ch, DIGIT)){
	139	intval = 0;
	140	while(INCHARSET(ch, DIGIT)){
	141	intval = intval*10 + ch - '0';
	142	ch = getchar();
	143	}
	144	while (INCHARSET(ch, SPACE))
	145	ch = getchar();
	146	if (ch == '"'){
	147	ptoken(bufptr, ILINENO);
	148	ptoken(bufptr, INT);
	149	pint(bufptr, intval - 1);
	150	ptoken(bufptr, IFILE);
	151	/*
	152	* The '"' has already been
	153	* munched
	154	*
	155	* eatstr will not eat
	156	* the trailing \n, so
	157	* it is given to the parser
	158	* and counted.
	159	*/
	160	goto eatstr;
	161	}
	162	}
	163	}
	164	/*
	165	* Well, its just an ordinary decadent comment
	166	*/
	167	while ((ch != '\n') && (ch != EOFCHAR))
	168	ch = getchar();
	169	if (ch == EOFCHAR)
	170	goto endoffile;
	171	val = ryylval = oval = NL;
	172	scanlineno++;
	173	goto ret;
	174
	175	case NL:
	176	scanlineno++;
	177	val = ryylval;
	178	goto ret;
	179
	180	case SP:
	181	oval = SP; /invalidate ^# meta comments/
	182	goto loop;
	183
	184	case REGOP: /* % , could be used as modulo, or register*/
	185	ch = getchar();
	186	if (INCHARSET(ch, DIGIT)){
	187	ryylval = ch-'0';
	188	if (ch=='1') {
	189	if (INCHARSET( (ch = getchar()), REGDIGIT))
	190	ryylval = 10+ch-'0';
	191	else
	192	ungetc(ch);
	193	}
	194	/*
	195	* God only knows what the original author
	196	* wanted this undocumented feature to
	197	* do.
	198	* %5++ is really r7
	199	*/
	200	while(INCHARSET( (ch = getchar()), SIGN)) {
	201	if (ch=='+')
	202	ryylval++;
	203	else
	204	ryylval--;
	205	}
	206	ungetc(ch);
	207	val = REG;
	208	} else {
	209	ungetc(ch);
	210	val = REGOP;
	211	}
	212	goto ret;
	213
	214	case ALPH:
	215	ch1 = ch;
	216	if (INCHARSET(ch, SZSPECBEGIN)){
	217	if( (ch = getchar()) == '`' \|\| ch == '^'){
	218	ch1 \|= 0100; /convert to lower/
	219	switch(ch1){
	220	case 'b': ryylval = 1; break;
	221	case 'w': ryylval = 2; break;
	222	case 'l': ryylval = 4; break;
	223	default: ryylval = d124; break;
	224	}
	225	val = SIZESPEC;
	226	goto ret;
	227	} else {
	228	ungetc(ch);
	229	ch = ch1; /restore first character/
	230	}
	231	}
	232	rcp = yytext;
	233	do {
	234	if (rcp < &yytext[NCPName])
	235	*rcp++ = ch;
	236	} while (INCHARSET ( (ch = getchar()), ALPHA \| DIGIT));
	237	*rcp = '\0';
	238	while (INCHARSET(ch, SPACE))
	239	ch = getchar();
	240	ungetc(ch);
	241
	242	switch((op = *lookup(1))->s_tag){
	243	case 0:
	244	case LABELID:
	245	/*
	246	* Its a name... (Labels are subsets of name)
	247	*/
	248	ryylval = (int)op;
	249	val = NAME;
	250	break;
	251	case INST0:
	252	case INSTn:
	253	case IJXXX:
	254	opstruct.Op_popcode = ( (struct instab *)op)->i_popcode;
	255	opstruct.Op_eopcode = ( (struct instab *)op)->i_eopcode;
	256	val = op->s_tag;
	257	break;
	258	default:
	259	ryylval = ( (struct instab *)op)->i_popcode;
	260	val = op->s_tag;
	261	break;
	262	}
	263	goto ret;
	264
	265	case DIG:
	266	/*
	267	* restore local inbufptr and inbufcnt
	268	*/
	269	REGTOMEMBUF;
	270	val = number(ch);
	271	MEMTOREGBUF;
	272	/*
	273	* yylval or yybignum has been stuffed as a side
	274	* effect to number(); get the global yylval
	275	* into our fast local copy in case it was an INT.
	276	*/
	277	ryylval = yylval;
	278	goto ret;
	279
	280	case LSH:
	281	case RSH:
	282	/*
	283	* We allow the C style operators
	284	* << and >>, as well as < and >
	285	*/
	286	if ( (ch1 = getchar()) != ch)
	287	ungetc(ch1);
	288	val = ryylval;
	289	goto ret;
	290
	291	case MINUS:
	292	if ( (ch = getchar()) =='(')
	293	ryylval=val=MP;
	294	else {
	295	ungetc(ch);
	296	val=MINUS;
	297	}
	298	goto ret;
	299
	300	case SQ:
	301	if ((ryylval = getchar()) == '\n')
	302	scanlineno++; /not entirely correct/
	303	val = INT;
	304	goto ret;
	305
	306	case DQ:
	307	eatstr:
	308	linescrossed = 0;
	309	for (strlg = 0; /VOID/; strlg++){
	310	switch(ch = getchar()){
	311	case '"':
	312	goto tailDQ;
	313	default:
	314	stuff:
	315	putc(ch, strfile);
	316	break;
	317	case '\n':
	318	yywarning("New line in a string constant");
	319	scanlineno++;
	320	linescrossed++;
	321	ch = getchar();
	322	switch(ch){
	323	case EOFCHAR:
	324	putc('\n', strfile);
	325	ungetc(EOFCHAR);
	326	goto tailDQ;
	327	default:
	328	ungetc(ch);
	329	ch = '\n';
	330	goto stuff;
	331	}
	332	break;
	333
	334	case '\\':
	335	ch = getchar(); /skip the '\\'/
	336	if ( INCHARSET(ch, BSESCAPE)){
	337	switch (ch){
	338	case 'b': ch = '\b'; goto stuff;
	339	case 'f': ch = '\f'; goto stuff;
	340	case 'n': ch = '\n'; goto stuff;
	341	case 'r': ch = '\r'; goto stuff;
	342	case 't': ch = '\t'; goto stuff;
	343	}
	344	}
	345	if ( !(INCHARSET(ch, OCTDIGIT)) )
	346	goto stuff;
	347	i = 0;
	348	intval = 0;
	349	while ( (i < 3) && (INCHARSET(ch, OCTDIGIT))){
	350	i++;
	351	intval <<= 3;
	352	intval += ch - '0';
	353	ch = getchar();
	354	}
	355	ungetc(ch);
	356	ch = (char)intval;
	357	goto stuff;
	358	}
	359	}
	360	tailDQ: ;
	361	/*
	362	* account for any lines that were crossed
	363	*/
	364	if (linescrossed){
	365	ptoken(bufptr, ILINESKIP);
	366	pint(bufptr, linescrossed);
	367	}
	368	/*
	369	* Cheat: append a trailing null to the string
	370	* and then adjust the string length to ignore
	371	* the trailing null. If any STRING client requires
	372	* the trailing null, the client can just change STRLEN
	373	*/
	374	putc(0, strfile);
	375	ryylval = (int)savestr((char *)0, strlg + 1, STR_FILE);
	376	val = STRING;
	377	((struct strdesc *)ryylval)->sd_strlen -= 1;
	378	goto ret;
	379
	380	case BADCHAR:
	381	linescrossed = lineno;
	382	lineno = scanlineno;
	383	yyerror("Illegal character mapped: %d, char read:(octal) %o",
	384	ryylval, ch);
	385	lineno = linescrossed;
	386	val = BADCHAR;
	387	goto ret;
	388
	389	default:
	390	val = ryylval;
	391	goto ret;
	392	} /end of the switch/
	393	/*
	394	* here with one token, so stuff it
	395	*/
	396	ret:
	397	oval = val;
	398	ptoken(bufptr, val);
	399	switch(val){
	400	case ILINESKIP:
	401	pint(bufptr, ryylval);
	402	break;
	403	case SIZESPEC:
	404	pchar(bufptr, ryylval);
	405	break;
	406	case BFINT: plong(bufptr, ryylval);
	407	break;
	408	case INT: plong(bufptr, ryylval);
	409	break;
	410	case BIGNUM: pnumber(bufptr, yybignum);
	411	break;
	412	case STRING: pptr(bufptr, (int)(char *)ryylval);
	413	break;
	414	case NAME: pptr(bufptr, (int)(struct symtab *)ryylval);
	415	break;
	416	case REG: pchar(bufptr, ryylval);
	417	break;
	418	case INST0:
	419	case INSTn:
	420	popcode(bufptr, opstruct);
	421	break;
	422	case IJXXX:
	423	popcode(bufptr, opstruct);
	424	pptr(bufptr, (int)(struct symtab *)symalloc());
	425	break;
	426	case ISTAB:
	427	case ISTABSTR:
	428	case ISTABNONE:
	429	case ISTABDOT:
	430	case IALIGN:
	431	pptr(bufptr, (int)(struct symtab *)symalloc());
	432	break;
	433	/*
	434	* default:
	435	*/
	436	}
	437	builtval: ;
	438	} /end of the while to stuff the buffer/
	439	done:
	440	bufferbox->tok_count = (bytetoktype *)bufptr - &(bufferbox->toks[0]);
	441	/*
	442	* This is a real kludge:
	443	*
	444	* We put the last token in the buffer to be a MINUS
	445	* symbol. This last token will never be picked up
	446	* in the normal way, but can be looked at during
	447	* a peekahead look that the short circuit expression
	448	* evaluator uses to see if an expression is complicated.
	449	*
	450	* Consider the following situation:
	451	*
	452	* .word 45 + 47
	453	* buffer 1 \| buffer 0
	454	* the peekahead would want to look across the buffer,
	455	* but will look in the buffer end zone, see the minus, and
	456	* fail.
	457	*/
	458	ptoken(bufptr, MINUS);
	459	REGTOMEMBUF;
	460	}