2
#define YYERROR goto yyerrlab
3
#define YYACCEPT return(0)
4
#define YYABORT return(1)
5
#define yyclearin yychar = -1
6
#define yyerrok yyerrflag = 0
12
static const char* yytoknames[1]; /* for debugging */
13
static const char* yystates[1]; /* for debugging */
16
/* parser for yacc output */
18
#define yynerrs yyarg->yynerrs
19
#define yyerrflag yyarg->yyerrflag
20
#define yyval yyarg->yyval
21
#define yylval yyarg->yylval
23
int yynerrs = 0; /* number of errors */
24
int yyerrflag = 0; /* error recovery flag */
32
if(yyc > 0 && yyc <= sizeof(yytoknames)/sizeof(yytoknames[0]))
34
return yytoknames[yyc-1];
35
sprintf(x, "<%d>", yyc);
44
if(yys >= 0 && yys < sizeof(yystates)/sizeof(yystates[0]))
47
sprintf(x, "<%d>\n", yys);
53
yylex1(struct Yyarg *yyarg)
63
yychar = yylex(yyarg);
71
if(yychar < sizeof(yytok1)/sizeof(yytok1[0])) {
75
if(yychar >= YYPRIVATE)
76
if(yychar < YYPRIVATE+sizeof(yytok2)/sizeof(yytok2[0])) {
77
c = yytok2[yychar-YYPRIVATE];
80
for(t3p=yytok3;; t3p+=2) {
93
c = yytok2[1]; /* unknown char */
95
printf("lex %.4lX %s\n", yychar, yytokname(c));
101
yyparse(struct Yyarg *yyarg)
110
} yys[YYMAXDEPTH], *yyp, *yypt;
112
int yyj, yym, yystate, yyn, yyg;
115
YYSTYPE save1, save2;
149
/* put a state and value onto the stack */
151
printf("char %s in %s", yytokname(yychar), yystatname(yystate));
154
if(yyp >= &yys[YYMAXDEPTH]) {
155
yyerror("yacc stack overflow");
162
yyn = yypact[yystate];
164
goto yydefault; /* simple state */
167
yychar = yylex1(yyarg);
172
if(yyn < 0 || yyn >= YYLAST)
175
if(yychk[yyn] == yychar) { /* valid shift */
185
/* default state action */
186
yyn = yydef[yystate];
190
yychar = yylex1(yyarg);
195
/* look through exception table */
196
for(yyxi=yyexca;; yyxi+=2)
197
if(yyxi[0] == -1 && yyxi[1] == yystate)
199
for(yyxi += 2;; yyxi += 2) {
201
if(yyn < 0 || yyn == yychar)
209
/* error ... attempt to resume parsing */
211
case 0: /* brand new error */
212
yyerror("syntax error");
214
printf("%s", yystatname(yystate));
215
printf("saw %s\n", yytokname(yychar));
222
case 2: /* incompletely recovered error ... try again */
225
/* find a state where "error" is a legal shift action */
227
yyn = yypact[yyp->yys] + YYERRCODE;
228
if(yyn >= 0 && yyn < YYLAST) {
229
yystate = yyact[yyn]; /* simulate a shift of "error" */
230
if(yychk[yystate] == YYERRCODE)
234
/* the current yyp has no shift onn "error", pop stack */
236
printf("error recovery pops state %d, uncovers %d\n",
237
yyp->yys, (yyp-1)->yys );
240
/* there is no state on the stack with an error shift ... abort */
243
case 3: /* no shift yet; clobber input char */
244
if(yydebug >= YYEOFCODE)
245
printf("error recovery discards %s\n", yytokname(yychar));
246
if(yychar == YYEOFCODE)
249
goto yynewstate; /* try again in the same state */
253
/* reduction by production yyn */
255
printf("reduce %d in:\n\t%s", yyn, yystatname(yystate));
259
yyval = (yyp+1)->yyv;
262
/* consult goto table to find next state */
265
yyj = yyg + yyp->yys + 1;
267
if(yyj >= YYLAST || yychk[yystate=yyact[yyj]] != -yyn)
268
yystate = yyact[yyg];
272
goto yystack; /* stack new state and value */