You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
327 lines
6.9 KiB
327 lines
6.9 KiB
// Copyright (c) 1993-1999 Microsoft Corporation
|
|
|
|
/* SCCSWHAT( "@(#)yypars.c 2.4 88/05/09 15:22:59 " ) */
|
|
___a_r_u_start
|
|
static char *SCCSID = "@(#)yypars.c:1.3";
|
|
# define YYFLAG -1000
|
|
# define YYERROR goto yyerrlab
|
|
# define YYACCEPT return(0)
|
|
# define YYABORT return(1)
|
|
|
|
#ifdef YYDEBUG /* RRR - 10/9/85 */
|
|
#define yyprintf(a, b, c, d, e) printf(a, b, c, d, e)
|
|
#else
|
|
#define yyprintf(a, b, c, d)
|
|
#endif
|
|
|
|
#ifndef YYPRINT
|
|
#define YYPRINT printf
|
|
#endif
|
|
|
|
#if ! defined YYSTATIC
|
|
#define YYSTATIC
|
|
#endif
|
|
|
|
/* parser for yacc output */
|
|
|
|
#ifdef YYDEBUG
|
|
YYSTATIC int yydebug = 0; /* 1 for debugging */
|
|
#endif
|
|
YYSTATIC YYSTYPE yyv[YYMAXDEPTH]; /* where the values are stored */
|
|
YYSTATIC short yys[YYMAXDEPTH]; /* the parse stack */
|
|
YYSTATIC int yychar = -1; /* current input token number */
|
|
YYSTATIC int yynerrs = 0; /* number of errors */
|
|
YYSTATIC short yyerrflag = 0; /* error recovery flag */
|
|
|
|
#ifdef YYRECOVER
|
|
/*
|
|
** yyscpy : copy f onto t and return a ptr to the null terminator at the
|
|
** end of t.
|
|
*/
|
|
YYSTATIC char *yyscpy(t,f)
|
|
register char *t, *f;
|
|
{
|
|
while(*t = *f++)
|
|
t++;
|
|
return(t); /* ptr to the null char */
|
|
}
|
|
#endif
|
|
|
|
#ifndef YYNEAR
|
|
#define YYNEAR
|
|
#endif
|
|
#ifndef YYPASCAL
|
|
#define YYPASCAL
|
|
#endif
|
|
#ifndef YYLOCAL
|
|
#define YYLOCAL
|
|
#endif
|
|
#if ! defined YYPARSER
|
|
#define YYPARSER yyparse
|
|
#endif
|
|
#if ! defined YYLEX
|
|
#define YYLEX yylex
|
|
#endif
|
|
|
|
static void yy_vc_init();
|
|
typedef void (*pfn)();
|
|
static pfn *pcase_fn_array;
|
|
static int returnflag = 0;
|
|
static YYSTYPE *yypvt;
|
|
static int yym_vc_max = 0;
|
|
extern short GrammarAct;
|
|
|
|
extern short yysavestate;
|
|
|
|
#define MAX_RECOVERY_ATTEMPTS (50)
|
|
#define MAX_RETRY_COUNT (3)
|
|
static short RetryCount = 0;
|
|
static short MaxRecoveryAttempts = 0;
|
|
static short fJustDiscarded = 0;
|
|
|
|
YYLOCAL YYNEAR YYPASCAL YYPARSER()
|
|
{
|
|
register short yyn;
|
|
short yystate, *yyps, *yysave_yyps;
|
|
YYSTYPE *yypv,*yysave_yypv;
|
|
YYSTYPE yysave_yyval;
|
|
short yyj, yym;
|
|
short fHaveRecoveredChar = 0;
|
|
|
|
yy_vc_init();
|
|
#ifdef YYDEBUG
|
|
yydebug = 1;
|
|
#endif /* YYDEBUG */
|
|
|
|
yystate = 0;
|
|
yychar = -1;
|
|
yynerrs = 0;
|
|
yyerrflag = 0;
|
|
yyps= &yys[-1];
|
|
yypv= &yyv[-1];
|
|
|
|
yystack: /* put a state and value onto the stack */
|
|
|
|
RetryCount = 0;
|
|
|
|
#ifdef YYDEBUG
|
|
yyprintf( "[yydebug] state %d, char %d = %c\n", yystate, yychar,yychar, 0 );
|
|
#else /* YYDEBUG */
|
|
yyprintf( "[yydebug] state %d, char %d\n", yystate, yychar, 0 );
|
|
#endif /* YYDEBUG */
|
|
if( ++yyps > &yys[YYMAXDEPTH] ) {
|
|
/* yyerror( "yacc stack overflow" ); */
|
|
ParseError(C_STACK_OVERFLOW, (char *)NULL);
|
|
return(1);
|
|
}
|
|
*yyps = yystate;
|
|
++yypv;
|
|
|
|
#ifdef UNION
|
|
yyunion(yypv, &yyval);
|
|
#else
|
|
*yypv = yyval;
|
|
#endif
|
|
|
|
yynewstate:
|
|
|
|
yysavestate = yystate;
|
|
yysave_yypv = yypv;
|
|
yysave_yyval= yyval;
|
|
yysave_yyps = yyps;
|
|
|
|
yyn = yypact[yystate];
|
|
|
|
if( yyn <= YYFLAG ) { /* simple state, no lookahead */
|
|
goto yydefault;
|
|
}
|
|
|
|
if( ! fHaveRecoveredChar )
|
|
{
|
|
if( yychar < 0 ) /* need a lookahead */
|
|
{
|
|
yychar = YYLEX();
|
|
}
|
|
}
|
|
|
|
fHaveRecoveredChar = 0;
|
|
|
|
if( ((yyn += yychar) < 0) || (yyn >= YYLAST) ) {
|
|
goto yydefault;
|
|
}
|
|
|
|
if( yychk[ yyn = yyact[ yyn ] ] == yychar ) { /* valid shift */
|
|
yychar = -1;
|
|
#ifdef UNION
|
|
yyunion(&yyval, &yylval);
|
|
#else
|
|
yyval = yylval;
|
|
#endif
|
|
yystate = yyn;
|
|
if( yyerrflag > 0 ) {
|
|
--yyerrflag;
|
|
}
|
|
goto yystack;
|
|
}
|
|
|
|
yydefault:
|
|
/* default state action */
|
|
|
|
if( (yyn = yydef[yystate]) == -2 ) {
|
|
register short *yyxi;
|
|
|
|
if( yychar < 0 ) {
|
|
yychar = YYLEX();
|
|
}
|
|
/*
|
|
** search exception table, we find a -1 followed by the current state.
|
|
** if we find one, we'll look through terminal,state pairs. if we find
|
|
** a terminal which matches the current one, we have a match.
|
|
** the exception table is when we have a reduce on a terminal.
|
|
*/
|
|
|
|
#if YYOPTTIME
|
|
yyxi = yyexca + yyexcaind[yystate];
|
|
while(( *yyxi != yychar ) && ( *yyxi >= 0 )){
|
|
yyxi += 2;
|
|
}
|
|
#else
|
|
for(yyxi = yyexca;
|
|
(*yyxi != (-1)) || (yyxi[1] != yystate);
|
|
yyxi += 2
|
|
) {
|
|
; /* VOID */
|
|
}
|
|
|
|
while( *(yyxi += 2) >= 0 ){
|
|
if( *yyxi == yychar ) {
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
if( (yyn = yyxi[1]) < 0 ) {
|
|
return(0); /* accept */
|
|
}
|
|
}
|
|
|
|
if( yyn == 0 ) /* error */
|
|
{
|
|
|
|
int yytempchar;
|
|
|
|
|
|
if( (yychar != EOI ) &&
|
|
( RetryCount < MAX_RETRY_COUNT ) &&
|
|
( MaxRecoveryAttempts < MAX_RECOVERY_ATTEMPTS ) )
|
|
{
|
|
if( RetryCount == 0 )
|
|
SyntaxError( BENIGN_SYNTAX_ERROR, yysavestate );
|
|
|
|
if((( yytempchar = PossibleMissingToken( yysavestate, yychar ) ) != -1 ))
|
|
{
|
|
char Buf[ 50 ];
|
|
|
|
|
|
fHaveRecoveredChar = 1;
|
|
yyunlex( yychar );
|
|
yychar = yytempchar;
|
|
|
|
if( (yytempchar < 128 ) && isprint( yytempchar ) )
|
|
{
|
|
sprintf( Buf, " %c ", yytempchar );
|
|
}
|
|
else if( yytempchar == IDENTIFIER )
|
|
{
|
|
yylval.yy_pSymName = GenTempName();
|
|
sprintf( Buf, " identifier %s", yylval.yy_pSymName );
|
|
}
|
|
else if( (yytempchar == NUMERICCONSTANT ) ||
|
|
(yytempchar == NUMERICLONGCONSTANT ) ||
|
|
(yytempchar == NUMERICULONGCONSTANT ) ||
|
|
(yytempchar == HEXCONSTANT ) ||
|
|
(yytempchar == HEXLONGCONSTANT ) ||
|
|
(yytempchar == HEXULONGCONSTANT ) )
|
|
{
|
|
sprintf( Buf, "a number" );
|
|
yylval.yy_numeric.Val = 0;
|
|
yylval.yy_numeric.pValStr = new char[2];
|
|
strcpy( yylval.yy_numeric.pValStr, "0");
|
|
}
|
|
|
|
ParseError( ASSUMING_CHAR, Buf );
|
|
RetryCount = 0;
|
|
MaxRecoveryAttempts++;
|
|
fJustDiscarded = 0;
|
|
}
|
|
else
|
|
{
|
|
char buf[ 20 ];
|
|
if( (yychar < 128 ) && isprint( yychar ) )
|
|
{
|
|
sprintf( buf, " %c ", yychar );
|
|
}
|
|
else
|
|
{
|
|
sprintf( buf, " the last token " );
|
|
}
|
|
|
|
ParseError( DISCARDING_CHAR, buf );
|
|
yychar = -1;
|
|
RetryCount++;
|
|
MaxRecoveryAttempts++;
|
|
fJustDiscarded = 1;
|
|
}
|
|
|
|
yystate = yysavestate;
|
|
yypv = yysave_yypv;
|
|
yyval = yysave_yyval;
|
|
yyps = yysave_yyps;
|
|
|
|
goto yynewstate;
|
|
|
|
}
|
|
else if( (yychar == EOI ) && (fJustDiscarded == 0 ) )
|
|
{
|
|
SyntaxError( UNEXPECTED_END_OF_FILE, yysavestate );
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
SyntaxError( SYNTAX_ERROR, yysavestate );
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* reduction by production yyn */
|
|
/* yyreduce: */
|
|
{
|
|
#ifdef YYDEBUG
|
|
yyprintf("[yydebug] reduce %d\n",yyn, 0, 0, 0);
|
|
#else /* YYDEBUG */
|
|
yyprintf("[yydebug] reduce %d\n",yyn, 0, 0);
|
|
#endif /* YYDEBUG */
|
|
yypvt = yypv;
|
|
yyps -= yyr2[yyn];
|
|
yypv -= yyr2[yyn];
|
|
#ifdef UNION
|
|
yyunion(&yyval, &yypv[1]);
|
|
#else
|
|
yyval = yypv[1];
|
|
#endif
|
|
yym = yyn;
|
|
yyn = yyr1[yyn]; /* consult goto table to find next state */
|
|
yyj = yypgo[yyn] + *yyps + 1;
|
|
if( (yyj >= YYLAST) || (yychk[ yystate = yyact[yyj] ] != -yyn) ) {
|
|
yystate = yyact[yypgo[yyn]];
|
|
}
|
|
returnflag = 0;
|
|
GrammarAct = yym;
|
|
(*(pcase_fn_array[ (yym <= yym_vc_max) ? yym : 0 ]))();
|
|
if(returnflag != 0)
|
|
return returnflag;
|
|
}
|
|
goto yystack; /* stack new state and value */
|
|
}
|
|
___a_r_u_myact
|
|
$A
|
|
___a_r_u_end
|