xref: /illumos-gate/usr/src/cmd/sgs/lex/common/ncform (revision 966c588f)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*	Copyright (c) 1989 AT&T	*/
/*	  All Rights Reserved	*/

int yylineno =1;
# define YYU(x) x
# define NLSTATE yyprevious=YYNEWLINE
struct yysvf *yylstate [YYLMAX], **yylsp, **yyolsp;
char yysbuf[YYLMAX];
char *yysptr = yysbuf;
int *yyfnd;
extern struct yysvf *yyestate;
int yyprevious = YYNEWLINE;

int
yylook(void)
{
	struct yysvf *yystate, **lsp;
	struct yywork *yyt;
	struct yysvf *yyz;
	int yych, yyfirst;
	struct yywork *yyr;
# ifdef LEXDEBUG
	int debug;
# endif
	char *yylastch;
	/* start off machines */
# ifdef LEXDEBUG
	debug = 0;
# endif
	yyfirst=1;
	if (!yymorfg)
		yylastch = yytext;
	else {
		yymorfg=0;
		yylastch = yytext+yyleng;
		}
	for(;;){
		lsp = yylstate;
		yyestate = yystate = yybgin;
		if (yyprevious==YYNEWLINE) yystate++;
		for (;;){
# ifdef LEXDEBUG
			if(debug)fprintf(yyout,"state %d\n",yystate-yysvec-1);
# endif
			yyt = yystate->yystoff;
			if(yyt == yycrank && !yyfirst){  /* may not be any transitions */
				yyz = yystate->yyother;
				if(yyz == 0)break;
				if(yyz->yystoff == yycrank)break;
				}
#ifndef __cplusplus
			*yylastch++ = yych = input();
#else
			*yylastch++ = yych = lex_input();
#endif
#ifdef YYISARRAY
			if(yylastch > &yytext[YYLMAX]) {
				fprintf(yyout,"Input string too long, limit %d\n",YYLMAX);
				exit(1);
			}
#else
			if (yylastch >= &yytext[ yytextsz ]) {
				int	x = yylastch - yytext;

				yytextsz += YYTEXTSZINC;
				if (yytext == yy_tbuf) {
				    yytext = (char *) malloc(yytextsz);
				    memcpy(yytext, yy_tbuf, sizeof (yy_tbuf));
				}
				else
				    yytext = (char *) realloc(yytext, yytextsz);
				if (!yytext) {
				    fprintf(yyout,
					"Cannot realloc yytext\n");
				    exit(1);
				}
				yylastch = yytext + x;
			}
#endif
			yyfirst=0;
		tryagain:
# ifdef LEXDEBUG
			if(debug){
				fprintf(yyout,"char ");
				allprint(yych);
				putchar('\n');
				}
# endif
			yyr = yyt;
			if ( (uintptr_t)yyt > (uintptr_t)yycrank){
				yyt = yyr + yych;
				if (yyt <= yytop && yyt->verify+yysvec == yystate){
					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
						{unput(*--yylastch);break;}
					*lsp++ = yystate = yyt->advance+yysvec;
					if(lsp > &yylstate[YYLMAX]) {
						fprintf(yyout,"Input string too long, limit %d\n",YYLMAX);
						exit(1);
					}
					goto contin;
					}
				}
# ifdef YYOPTIM
			else if((uintptr_t)yyt < (uintptr_t)yycrank) {	/* r < yycrank */
				yyt = yyr = yycrank+(yycrank-yyt);
# ifdef LEXDEBUG
				if(debug)fprintf(yyout,"compressed state\n");
# endif
				yyt = yyt + yych;
				if(yyt <= yytop && yyt->verify+yysvec == yystate){
					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
						{unput(*--yylastch);break;}
					*lsp++ = yystate = yyt->advance+yysvec;
					if(lsp > &yylstate[YYLMAX]) {
						fprintf(yyout,"Input string too long, limit %d\n",YYLMAX);
						exit(1);
					}
					goto contin;
					}
				yyt = yyr + YYU(yymatch[yych]);
# ifdef LEXDEBUG
				if(debug){
					fprintf(yyout,"try fall back character ");
					allprint(YYU(yymatch[yych]));
					putchar('\n');
					}
# endif
				if(yyt <= yytop && yyt->verify+yysvec == yystate){
					if(yyt->advance+yysvec == YYLERR)	/* error transition */
						{unput(*--yylastch);break;}
					*lsp++ = yystate = yyt->advance+yysvec;
					if(lsp > &yylstate[YYLMAX]) {
						fprintf(yyout,"Input string too long, limit %d\n",YYLMAX);
						exit(1);
					}
					goto contin;
					}
				}
			if ((yystate = yystate->yyother) && (yyt= yystate->yystoff) != yycrank){
# ifdef LEXDEBUG
				if(debug)fprintf(yyout,"fall back to state %d\n",yystate-yysvec-1);
# endif
				goto tryagain;
				}
# endif
			else
				{unput(*--yylastch);break;}
		contin:
# ifdef LEXDEBUG
			if(debug){
				fprintf(yyout,"state %d char ",yystate-yysvec-1);
				allprint(yych);
				putchar('\n');
				}
# endif
			;
			}
# ifdef LEXDEBUG
		if(debug){
			fprintf(yyout,"stopped at %d with ",*(lsp-1)-yysvec-1);
			allprint(yych);
			putchar('\n');
			}
# endif
		while (lsp-- > yylstate){
			*yylastch-- = 0;
			if (*lsp != 0 && (yyfnd= (*lsp)->yystops) && *yyfnd > 0){
				yyolsp = lsp;
				if(yyextra[*yyfnd]){		/* must backup */
					while(yyback((*lsp)->yystops,-*yyfnd) != 1 && lsp > yylstate){
						lsp--;
						unput(*yylastch--);
						}
					}
				yyprevious = YYU(*yylastch);
				yylsp = lsp;
				yyleng = yylastch-yytext+1;
				yytext[yyleng] = 0;
# ifdef LEXDEBUG
				if(debug){
					fprintf(yyout,"\nmatch ");
					sprint(yytext);
					fprintf(yyout," action %d\n",*yyfnd);
					}
# endif
				return(*yyfnd++);
				}
			unput(*yylastch);
			}
		if (yytext[0] == 0  /* && feof(yyin) */)
			{
			yysptr=yysbuf;
			return(0);
			}
#ifndef __cplusplus
		yyprevious = yytext[0] = input();
		if (yyprevious>0)
			output(yyprevious);
#else
		yyprevious = yytext[0] = lex_input();
		if (yyprevious>0)
			lex_output(yyprevious);
#endif
		yylastch=yytext;
# ifdef LEXDEBUG
		if(debug)putchar('\n');
# endif
		}
}

int yyback(int *p, int m)
{
	if (p==0) return(0);
	while (*p) {
		if (*p++ == m)
			return(1);
	}
	return(0);
}

/* the following are only used in the lex library */
int
yyinput(void)
{
#ifndef __cplusplus
	return(input());
#else
	return(lex_input());
#endif
}

void
yyoutput(int c)
{
#ifndef __cplusplus
	output(c);
#else
	lex_output(c);
#endif
}

void
yyunput(int c)
{
	unput(c);
}