1 /****************************************************************
2 Copyright (C) Lucent Technologies 1997
5 Permission to use, copy, modify, and distribute this software and
6 its documentation for any purpose and without fee is hereby
7 granted, provided that the above copyright notice appear in all
8 copies and that both that the copyright notice and this
9 permission notice and warranty disclaimer appear in supporting
10 documentation, and that the name Lucent Technologies or any of
11 its entities not be used in advertising or publicity pertaining
12 to distribution of the software without specific, written prior
15 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
17 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
18 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
20 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
21 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
23 ****************************************************************/
30 #define makedfa(a,b) compre(a)
32 void checkdup(Node *list, Cell *item);
33 int yywrap(void) { return(1); }
37 int infunc = 0; /* = 1 if in arglist or body of func */
38 int inloop = 0; /* = 1 if in while, for, do */
39 char *curfname = 0; /* current function name */
40 Node *arglist = 0; /* list of args for current function */
50 %token <i> FIRSTTOKEN /* must be first */
51 %token <p> PROGRAM PASTAT PASTAT2 XBEGIN XEND
52 %token <i> NL ',' '{' '(' '|' ';' '/' ')' '}' '[' ']'
54 %token <i> MATCH NOTMATCH MATCHOP
55 %token <i> FINAL DOT ALL CCL NCCL CHAR OR STAR QUEST PLUS
56 %token <i> AND BOR APPEND EQ GE GT LE LT NE IN
57 %token <i> ARG BLTIN BREAK CLOSE CONTINUE DELETE DO EXIT FOR FUNC
58 %token <i> SUB GSUB IF INDEX LSUBSTR MATCHFCN NEXT NEXTFILE
59 %token <i> ADD MINUS MULT DIVIDE MOD
60 %token <i> ASSIGN ASGNOP ADDEQ SUBEQ MULTEQ DIVEQ MODEQ POWEQ
61 %token <i> PRINT PRINTF SPRINTF
62 %token <p> ELSE INTEST CONDEXPR
63 %token <i> POSTINCR PREINCR POSTDECR PREDECR
64 %token <cp> VAR IVAR VARNF CALL NUMBER STRING
67 %type <p> pas pattern ppattern plist pplist patlist prarg term re
68 %type <p> pa_pat pa_stat pa_stats
70 %type <p> simple_stmt opt_simple_stmt stmt stmtlist
71 %type <p> var varname funcname varlist
72 %type <p> for if else while
74 %type <i> pst opt_pst lbrace rbrace rparen comma nl opt_nl and bor
83 %nonassoc APPEND EQ GE GT LE LT NE MATCHOP IN '|'
84 %left ARG BLTIN BREAK CALL CLOSE CONTINUE DELETE DO EXIT FOR FUNC
85 %left GSUB IF INDEX LSUBSTR MATCHFCN NEXT NUMBER
86 %left PRINT PRINTF RETURN SPLIT SPRINTF STRING SUB SUBSTR
87 %left REGEXPR VAR VARNF IVAR WHILE '('
95 %token LASTTOKEN /* must be last */
100 pas { if (errorflag==0)
101 winner = (Node *)stat3(PROGRAM, beginloc, $1, endloc); }
102 | error { yyclearin; bracecheck(); SYNTAX("bailing out"); }
126 FOR '(' opt_simple_stmt ';' opt_nl pattern ';' opt_nl opt_simple_stmt rparen {inloop++;} stmt
127 { --inloop; $$ = stat4(FOR, $3, notnull($6), $9, $12); }
128 | FOR '(' opt_simple_stmt ';' ';' opt_nl opt_simple_stmt rparen {inloop++;} stmt
129 { --inloop; $$ = stat4(FOR, $3, NIL, $7, $10); }
130 | FOR '(' varname IN varname rparen {inloop++;} stmt
131 { --inloop; $$ = stat3(IN, $3, makearr($5), $8); }
135 VAR { setfname($1); }
136 | CALL { setfname($1); }
140 IF '(' pattern rparen { $$ = notnull($3); }
152 /* empty */ { $$ = 0; }
157 /* empty */ { $$ = 0; }
163 /* empty */ { $$ = 0; }
169 | opt_pst pa_stats opt_pst { $$ = $2; }
173 pattern { $$ = notnull($1); }
177 pa_pat { $$ = stat2(PASTAT, $1, stat2(PRINT, rectonode(), NIL)); }
178 | pa_pat lbrace stmtlist '}' { $$ = stat2(PASTAT, $1, $3); }
179 | pa_pat ',' pa_pat { $$ = pa2stat($1, $3, stat2(PRINT, rectonode(), NIL)); }
180 | pa_pat ',' pa_pat lbrace stmtlist '}' { $$ = pa2stat($1, $3, $5); }
181 | lbrace stmtlist '}' { $$ = stat2(PASTAT, NIL, $2); }
182 | XBEGIN lbrace stmtlist '}'
183 { beginloc = linkum(beginloc, $3); $$ = 0; }
184 | XEND lbrace stmtlist '}'
185 { endloc = linkum(endloc, $3); $$ = 0; }
186 | FUNC funcname '(' varlist rparen {infunc++;} lbrace stmtlist '}'
187 { infunc--; curfname=0; defn((Cell *)$2, $4, $8); $$ = 0; }
192 | pa_stats opt_pst pa_stat { $$ = linkum($1, $3); }
197 | patlist comma pattern { $$ = linkum($1, $3); }
201 var ASGNOP ppattern { $$ = op2($2, $1, $3); }
202 | ppattern '?' ppattern ':' ppattern %prec '?'
203 { $$ = op3(CONDEXPR, notnull($1), $3, $5); }
204 | ppattern bor ppattern %prec BOR
205 { $$ = op2(BOR, notnull($1), notnull($3)); }
206 | ppattern and ppattern %prec AND
207 { $$ = op2(AND, notnull($1), notnull($3)); }
208 | ppattern MATCHOP reg_expr { $$ = op3($2, NIL, $1, (Node*)makedfa($3, 0)); }
209 | ppattern MATCHOP ppattern
211 $$ = op3($2, NIL, $1, (Node*)makedfa(strnode($3), 0));
213 $$ = op3($2, (Node *)1, $1, $3); }
214 | ppattern IN varname { $$ = op2(INTEST, $1, makearr($3)); }
215 | '(' plist ')' IN varname { $$ = op2(INTEST, $2, makearr($5)); }
216 | ppattern term %prec CAT { $$ = op2(CAT, $1, $2); }
222 var ASGNOP pattern { $$ = op2($2, $1, $3); }
223 | pattern '?' pattern ':' pattern %prec '?'
224 { $$ = op3(CONDEXPR, notnull($1), $3, $5); }
225 | pattern bor pattern %prec BOR
226 { $$ = op2(BOR, notnull($1), notnull($3)); }
227 | pattern and pattern %prec AND
228 { $$ = op2(AND, notnull($1), notnull($3)); }
229 | pattern EQ pattern { $$ = op2($2, $1, $3); }
230 | pattern GE pattern { $$ = op2($2, $1, $3); }
231 | pattern GT pattern { $$ = op2($2, $1, $3); }
232 | pattern LE pattern { $$ = op2($2, $1, $3); }
233 | pattern LT pattern { $$ = op2($2, $1, $3); }
234 | pattern NE pattern { $$ = op2($2, $1, $3); }
235 | pattern MATCHOP reg_expr { $$ = op3($2, NIL, $1, (Node*)makedfa($3, 0)); }
236 | pattern MATCHOP pattern
238 $$ = op3($2, NIL, $1, (Node*)makedfa(strnode($3), 0));
240 $$ = op3($2, (Node *)1, $1, $3); }
241 | pattern IN varname { $$ = op2(INTEST, $1, makearr($3)); }
242 | '(' plist ')' IN varname { $$ = op2(INTEST, $2, makearr($5)); }
243 | pattern '|' GETLINE var {
244 if (safe) SYNTAX("cmd | getline is unsafe");
245 else $$ = op3(GETLINE, $4, itonp($2), $1); }
246 | pattern '|' GETLINE {
247 if (safe) SYNTAX("cmd | getline is unsafe");
248 else $$ = op3(GETLINE, (Node*)0, itonp($2), $1); }
249 | pattern term %prec CAT { $$ = op2(CAT, $1, $2); }
255 pattern comma pattern { $$ = linkum($1, $3); }
256 | plist comma pattern { $$ = linkum($1, $3); }
261 | pplist comma ppattern { $$ = linkum($1, $3); }
265 /* empty */ { $$ = rectonode(); }
267 | '(' plist ')' { $$ = $2; }
275 NL | ';' | pst NL | pst ';'
284 { $$ = op3(MATCH, NIL, rectonode(), (Node*)makedfa($1, 0)); }
285 | NOT re { $$ = op1(NOT, notnull($2)); }
289 '/' {startreg();} REGEXPR '/' { $$ = $3; }
297 print prarg '|' term {
298 if (safe) SYNTAX("print | is unsafe");
299 else $$ = stat3($1, $2, itonp($3), $4); }
300 | print prarg APPEND term {
301 if (safe) SYNTAX("print >> is unsafe");
302 else $$ = stat3($1, $2, itonp($3), $4); }
303 | print prarg GT term {
304 if (safe) SYNTAX("print > is unsafe");
305 else $$ = stat3($1, $2, itonp($3), $4); }
306 | print prarg { $$ = stat3($1, $2, NIL, NIL); }
307 | DELETE varname '[' patlist ']' { $$ = stat2(DELETE, makearr($2), $4); }
308 | DELETE varname { $$ = stat2(DELETE, makearr($2), 0); }
309 | pattern { $$ = exptostat($1); }
310 | error { yyclearin; SYNTAX("illegal statement"); }
319 BREAK st { if (!inloop) SYNTAX("break illegal outside of loops");
320 $$ = stat1(BREAK, NIL); }
321 | CLOSE pattern st { $$ = stat1(CLOSE, $2); }
322 | CONTINUE st { if (!inloop) SYNTAX("continue illegal outside of loops");
323 $$ = stat1(CONTINUE, NIL); }
324 | do {inloop++;} stmt {--inloop;} WHILE '(' pattern ')' st
325 { $$ = stat2(DO, $3, notnull($7)); }
326 | EXIT pattern st { $$ = stat1(EXIT, $2); }
327 | EXIT st { $$ = stat1(EXIT, NIL); }
329 | if stmt else stmt { $$ = stat3(IF, $1, $2, $4); }
330 | if stmt { $$ = stat3(IF, $1, $2, NIL); }
331 | lbrace stmtlist rbrace { $$ = $2; }
332 | NEXT st { if (infunc)
333 SYNTAX("next is illegal inside a function");
334 $$ = stat1(NEXT, NIL); }
335 | NEXTFILE st { if (infunc)
336 SYNTAX("nextfile is illegal inside a function");
337 $$ = stat1(NEXTFILE, NIL); }
338 | RETURN pattern st { $$ = stat1(RETURN, $2); }
339 | RETURN st { $$ = stat1(RETURN, NIL); }
341 | while {inloop++;} stmt { --inloop; $$ = stat2(WHILE, $1, $3); }
342 | ';' opt_nl { $$ = 0; }
347 | stmtlist stmt { $$ = linkum($1, $2); }
355 term '/' ASGNOP term { $$ = op2(DIVEQ, $1, $4); }
356 | term '+' term { $$ = op2(ADD, $1, $3); }
357 | term '-' term { $$ = op2(MINUS, $1, $3); }
358 | term '*' term { $$ = op2(MULT, $1, $3); }
359 | term '/' term { $$ = op2(DIVIDE, $1, $3); }
360 | term '%' term { $$ = op2(MOD, $1, $3); }
361 | term POWER term { $$ = op2(POWER, $1, $3); }
362 | '-' term %prec UMINUS { $$ = op1(UMINUS, $2); }
363 | '+' term %prec UMINUS { $$ = $2; }
364 | NOT term %prec UMINUS { $$ = op1(NOT, notnull($2)); }
365 | BLTIN '(' ')' { $$ = op2(BLTIN, itonp($1), rectonode()); }
366 | BLTIN '(' patlist ')' { $$ = op2(BLTIN, itonp($1), $3); }
367 | BLTIN { $$ = op2(BLTIN, itonp($1), rectonode()); }
368 | CALL '(' ')' { $$ = op2(CALL, celltonode($1,CVAR), NIL); }
369 | CALL '(' patlist ')' { $$ = op2(CALL, celltonode($1,CVAR), $3); }
370 | DECR var { $$ = op1(PREDECR, $2); }
371 | INCR var { $$ = op1(PREINCR, $2); }
372 | var DECR { $$ = op1(POSTDECR, $1); }
373 | var INCR { $$ = op1(POSTINCR, $1); }
374 | GETLINE var LT term { $$ = op3(GETLINE, $2, itonp($3), $4); }
375 | GETLINE LT term { $$ = op3(GETLINE, NIL, itonp($2), $3); }
376 | GETLINE var { $$ = op3(GETLINE, $2, NIL, NIL); }
377 | GETLINE { $$ = op3(GETLINE, NIL, NIL, NIL); }
378 | INDEX '(' pattern comma pattern ')'
379 { $$ = op2(INDEX, $3, $5); }
380 | INDEX '(' pattern comma reg_expr ')'
381 { SYNTAX("index() doesn't permit regular expressions");
382 $$ = op2(INDEX, $3, (Node*)$5); }
383 | '(' pattern ')' { $$ = $2; }
384 | MATCHFCN '(' pattern comma reg_expr ')'
385 { $$ = op3(MATCHFCN, NIL, $3, (Node*)makedfa($5, 1)); }
386 | MATCHFCN '(' pattern comma pattern ')'
388 $$ = op3(MATCHFCN, NIL, $3, (Node*)makedfa(strnode($5), 1));
390 $$ = op3(MATCHFCN, (Node *)1, $3, $5); }
391 | NUMBER { $$ = celltonode($1, CCON); }
392 | SPLIT '(' pattern comma varname comma pattern ')' /* string */
393 { $$ = op4(SPLIT, $3, makearr($5), $7, (Node*)STRING); }
394 | SPLIT '(' pattern comma varname comma reg_expr ')' /* const /regexp/ */
395 { $$ = op4(SPLIT, $3, makearr($5), (Node*)makedfa($7, 1), (Node *)REGEXPR); }
396 | SPLIT '(' pattern comma varname ')'
397 { $$ = op4(SPLIT, $3, makearr($5), NIL, (Node*)STRING); } /* default */
398 | SPRINTF '(' patlist ')' { $$ = op1($1, $3); }
399 | STRING { $$ = celltonode($1, CCON); }
400 | subop '(' reg_expr comma pattern ')'
401 { $$ = op4($1, NIL, (Node*)makedfa($3, 1), $5, rectonode()); }
402 | subop '(' pattern comma pattern ')'
404 $$ = op4($1, NIL, (Node*)makedfa(strnode($3), 1), $5, rectonode());
406 $$ = op4($1, (Node *)1, $3, $5, rectonode()); }
407 | subop '(' reg_expr comma pattern comma var ')'
408 { $$ = op4($1, NIL, (Node*)makedfa($3, 1), $5, $7); }
409 | subop '(' pattern comma pattern comma var ')'
411 $$ = op4($1, NIL, (Node*)makedfa(strnode($3), 1), $5, $7);
413 $$ = op4($1, (Node *)1, $3, $5, $7); }
414 | SUBSTR '(' pattern comma pattern comma pattern ')'
415 { $$ = op3(SUBSTR, $3, $5, $7); }
416 | SUBSTR '(' pattern comma pattern ')'
417 { $$ = op3(SUBSTR, $3, $5, NIL); }
423 | varname '[' patlist ']' { $$ = op2(ARRAY, makearr($1), $3); }
424 | IVAR { $$ = op1(INDIRECT, celltonode($1, CVAR)); }
425 | INDIRECT term { $$ = op1(INDIRECT, $2); }
429 /* nothing */ { arglist = $$ = 0; }
430 | VAR { arglist = $$ = celltonode($1,CVAR); }
431 | varlist comma VAR {
433 arglist = $$ = linkum($1,celltonode($3,CVAR)); }
437 VAR { $$ = celltonode($1, CVAR); }
438 | ARG { $$ = op1(ARG, itonp($1)); }
439 | VARNF { $$ = op1(VARNF, (Node *) $1); }
444 WHILE '(' pattern rparen { $$ = notnull($3); }
449 void setfname(Cell *p)
452 SYNTAX("%s is an array, not a function", p->nval);
454 SYNTAX("you can't define function %s more than once", p->nval);
458 int constnode(Node *p)
460 return isvalue(p) && ((Cell *) (p->narg[0]))->csub == CCON;
463 char *strnode(Node *p)
465 return ((Cell *)(p->narg[0]))->sval;
468 Node *notnull(Node *n)
471 case LE: case LT: case EQ: case NE: case GT: case GE:
472 case BOR: case AND: case NOT:
475 return op2(NE, n, nullnode);
479 void checkdup(Node *vl, Cell *cp) /* check if name already in list */
482 for ( ; vl; vl = vl->nnext) {
483 if (strcmp(s, ((Cell *)(vl->narg[0]))->nval) == 0) {
484 SYNTAX("duplicate argument %s", s);