1 /*-----------------------------------------------------------------------
3 SDCC.y - parser definition file for sdcc :
4 Written By : Sandeep Dutta . sandeep.dutta@usa.net (1997)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
28 #include "SDCCglobl.h"
30 #include "SDCChasht.h"
39 extern int yyerror (char *);
41 int NestLevel = 0 ; /* current NestLevel */
42 int stackPtr = 1 ; /* stack pointer */
43 int xstackPtr = 0 ; /* xstack pointer */
45 int blockNo = 0 ; /* sequential block number */
48 int seqPointNo= 1 ; /* sequence point number */
49 int ignoreTypedefType=0;
53 char lbuff[1024]; /* local buffer */
55 /* break & continue stacks */
56 STACK_DCL(continueStack ,symbol *,MAX_NEST_LEVEL)
57 STACK_DCL(breakStack ,symbol *,MAX_NEST_LEVEL)
58 STACK_DCL(forStack ,symbol *,MAX_NEST_LEVEL)
59 STACK_DCL(swStk ,ast *,MAX_NEST_LEVEL)
60 STACK_DCL(blockNum,int,MAX_NEST_LEVEL*3)
62 value *cenum = NULL ; /* current enumeration type chain*/
63 bool uselessDecl = TRUE;
71 symbol *sym ; /* symbol table pointer */
72 structdef *sdef; /* structure definition */
73 char yychar[SDCC_NAME_MAX+1];
74 sym_link *lnk ; /* declarator or specifier */
75 int yyint; /* integer value returned */
76 value *val ; /* for integer constant */
77 initList *ilist; /* initial list */
78 const char *yyinline; /* inlined assembler code */
79 ast *asts; /* expression tree */
82 %token <yychar> IDENTIFIER TYPE_NAME
83 %token <val> CONSTANT STRING_LITERAL
85 %token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
87 %token <yyint> MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
88 %token <yyint> SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
89 %token <yyint> XOR_ASSIGN OR_ASSIGN
90 %token TYPEDEF EXTERN STATIC AUTO REGISTER CODE EEPROM INTERRUPT SFR SFR16 SFR32
91 %token AT SBIT REENTRANT USING XDATA DATA IDATA PDATA VAR_ARGS CRITICAL
92 %token NONBANKED BANKED SHADOWREGS WPARAM
93 %token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE FIXED16X16 CONST VOLATILE VOID BIT
94 %token STRUCT UNION ENUM RANGE FAR
95 %token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
96 %token NAKED JAVANATIVE OVERLAY
97 %token <yyinline> INLINEASM
98 %token IFX ADDRESS_OF GET_VALUE_AT_ADDRESS SPIL UNSPIL GETHBIT GETABIT GETBYTE GETWORD
99 %token BITWISEAND UNARYMINUS IPUSH IPOP PCALL ENDFUNCTION JUMPTABLE
101 %token CAST CALL PARAM NULLOP BLOCK LABEL RECEIVE SEND ARRAYINIT
102 %token DUMMY_READ_VOLATILE ENDCRITICAL SWAP INLINE RESTRICT
104 %type <yyint> Interrupt_storage
105 %type <sym> identifier declarator declarator2 declarator3 enumerator_list enumerator
106 %type <sym> struct_declarator function_declarator function_declarator2
107 %type <sym> struct_declarator_list struct_declaration struct_declaration_list
108 %type <sym> declaration init_declarator_list init_declarator
109 %type <sym> declaration_list identifier_list
110 %type <sym> declarator2_function_attributes while do for critical
111 %type <lnk> pointer type_specifier_list type_specifier type_name
112 %type <lnk> storage_class_specifier struct_or_union_specifier
113 %type <lnk> declaration_specifiers sfr_reg_bit sfr_attributes type_specifier2
114 %type <lnk> function_attribute function_attributes enum_specifier
115 %type <lnk> abstract_declarator abstract_declarator2 unqualified_pointer
116 %type <val> parameter_type_list parameter_list parameter_declaration opt_assign_expr
117 %type <sdef> stag opt_stag
118 %type <asts> primary_expr
119 %type <asts> postfix_expr unary_expr cast_expr multiplicative_expr
120 %type <asts> additive_expr shift_expr relational_expr equality_expr
121 %type <asts> and_expr exclusive_or_expr inclusive_or_expr logical_or_expr
122 %type <asts> logical_and_expr conditional_expr assignment_expr constant_expr
123 %type <asts> expr argument_expr_list function_definition expr_opt
124 %type <asts> statement_list statement labeled_statement compound_statement
125 %type <asts> expression_statement selection_statement iteration_statement
126 %type <asts> jump_statement function_body else_statement string_literal
127 %type <asts> critical_statement
128 %type <ilist> initializer initializer_list
129 %type <yyint> unary_operator assignment_operator struct_or_union
137 { if (!options.lessPedantic)
138 werror(W_EMPTY_SOURCE_FILE);
144 : external_definition
145 | program external_definition
149 : function_definition {
153 ignoreTypedefType = 0;
155 && IS_FUNC($1->type))
157 /* The only legal storage classes for
158 * a function prototype (declaration)
159 * are extern and static. extern is the
160 * default. Thus, if this function isn't
161 * explicitly marked static, mark it
165 && IS_SPEC($1->etype)
166 && !SPEC_STAT($1->etype))
168 SPEC_EXTR($1->etype) = 1;
172 allocVariables ($1) ;
173 cleanUpLevel (SymbolTab,1);
178 : function_declarator function_body { /* function type not specified */
179 /* assume it to be 'int' */
180 addDecl($1,0,newIntLink());
181 $$ = createFunction($1,$2);
183 | declaration_specifiers function_declarator function_body
185 pointerTypes($2->type,copyLinkChain($1));
186 if (options.unsigned_char && SPEC_NOUN($1) == V_CHAR && !($1)->select.s.b_signed)
189 $$ = createFunction($2,$3);
194 : function_attributes
195 | function_attributes function_attribute { $$ = mergeSpec($1,$2,"function_attribute"); }
199 : USING constant_expr {
200 $$ = newLink(SPECIFIER) ;
201 FUNC_REGBANK($$) = (int) floatFromVal(constExprValue($2,TRUE));
203 | REENTRANT { $$ = newLink (SPECIFIER);
206 | CRITICAL { $$ = newLink (SPECIFIER);
207 FUNC_ISCRITICAL($$) = 1;
209 | NAKED { $$ = newLink (SPECIFIER);
212 | JAVANATIVE { $$ = newLink (SPECIFIER);
213 FUNC_ISJAVANATIVE($$)=1;
215 | OVERLAY { $$ = newLink (SPECIFIER);
216 FUNC_ISOVERLAY($$)=1;
218 | NONBANKED {$$ = newLink (SPECIFIER);
219 FUNC_NONBANKED($$) = 1;
220 if (FUNC_BANKED($$)) {
221 werror(W_BANKED_WITH_NONBANKED);
224 | SHADOWREGS {$$ = newLink (SPECIFIER);
225 FUNC_ISSHADOWREGS($$) = 1;
227 | WPARAM {$$ = newLink (SPECIFIER);
228 FUNC_ISWPARAM($$) = 1;
230 | BANKED {$$ = newLink (SPECIFIER);
232 if (FUNC_NONBANKED($$)) {
233 werror(W_BANKED_WITH_NONBANKED);
236 werror(W_BANKED_WITH_STATIC);
241 $$ = newLink (SPECIFIER) ;
242 FUNC_INTNO($$) = $1 ;
249 | declaration_list compound_statement
251 werror(E_OLD_STYLE,($1 ? $1->name: "")) ;
257 : identifier { $$ = newAst_VALUE(symbolVal($1)); }
258 | CONSTANT { $$ = newAst_VALUE($1); }
260 | '(' expr ')' { $$ = $2 ; }
264 : STRING_LITERAL { $$ = newAst_VALUE($1); }
269 | postfix_expr '[' expr ']' { $$ = newNode ('[', $1, $3) ; }
270 | postfix_expr '(' ')' { $$ = newNode (CALL,$1,NULL);
271 $$->left->funcName = 1;}
272 | postfix_expr '(' argument_expr_list ')'
274 $$ = newNode (CALL,$1,$3) ; $$->left->funcName = 1;
276 | postfix_expr '.' { ignoreTypedefType = 1; } identifier
278 ignoreTypedefType = 0;
279 $4 = newSymbol($4->name,NestLevel);
281 $$ = newNode(PTR_OP,newNode('&',$1,NULL),newAst_VALUE(symbolVal($4)));
282 /* $$ = newNode('.',$1,newAst(EX_VALUE,symbolVal($4))) ; */
284 | postfix_expr PTR_OP { ignoreTypedefType = 1; } identifier
286 ignoreTypedefType = 0;
287 $4 = newSymbol($4->name,NestLevel);
289 $$ = newNode(PTR_OP,$1,newAst_VALUE(symbolVal($4)));
291 | postfix_expr INC_OP
292 { $$ = newNode(INC_OP,$1,NULL);}
293 | postfix_expr DEC_OP
294 { $$ = newNode(DEC_OP,$1,NULL); }
299 | assignment_expr ',' argument_expr_list { $$ = newNode(PARAM,$1,$3); }
304 | INC_OP unary_expr { $$ = newNode(INC_OP,NULL,$2); }
305 | DEC_OP unary_expr { $$ = newNode(DEC_OP,NULL,$2); }
306 | unary_operator cast_expr { $$ = newNode($1,$2,NULL) ; }
307 | SIZEOF unary_expr { $$ = newNode(SIZEOF,NULL,$2); }
308 | SIZEOF '(' type_name ')' { $$ = newAst_VALUE(sizeofOp($3)); }
309 | TYPEOF unary_expr { $$ = newNode(TYPEOF,NULL,$2); }
323 | '(' type_name ')' cast_expr { $$ = newNode(CAST,newAst_LINK($2),$4); }
328 | multiplicative_expr '*' cast_expr { $$ = newNode('*',$1,$3);}
329 | multiplicative_expr '/' cast_expr { $$ = newNode('/',$1,$3);}
330 | multiplicative_expr '%' cast_expr { $$ = newNode('%',$1,$3);}
334 : multiplicative_expr
335 | additive_expr '+' multiplicative_expr { $$=newNode('+',$1,$3);}
336 | additive_expr '-' multiplicative_expr { $$=newNode('-',$1,$3);}
341 | shift_expr LEFT_OP additive_expr { $$ = newNode(LEFT_OP,$1,$3); }
342 | shift_expr RIGHT_OP additive_expr { $$ = newNode(RIGHT_OP,$1,$3); }
347 | relational_expr '<' shift_expr { $$ = newNode('<', $1,$3);}
348 | relational_expr '>' shift_expr { $$ = newNode('>', $1,$3);}
349 | relational_expr LE_OP shift_expr { $$ = newNode(LE_OP,$1,$3);}
350 | relational_expr GE_OP shift_expr { $$ = newNode(GE_OP,$1,$3);}
355 | equality_expr EQ_OP relational_expr { $$ = newNode(EQ_OP,$1,$3);}
356 | equality_expr NE_OP relational_expr { $$ = newNode(NE_OP,$1,$3);}
361 | and_expr '&' equality_expr { $$ = newNode('&',$1,$3);}
366 | exclusive_or_expr '^' and_expr { $$ = newNode('^',$1,$3);}
371 | inclusive_or_expr '|' exclusive_or_expr { $$ = newNode('|',$1,$3);}
376 | logical_and_expr AND_OP { seqPointNo++;} inclusive_or_expr
377 { $$ = newNode(AND_OP,$1,$4);}
382 | logical_or_expr OR_OP { seqPointNo++;} logical_and_expr
383 { $$ = newNode(OR_OP,$1,$4); }
388 | logical_or_expr '?' { seqPointNo++;} logical_or_expr ':' conditional_expr
390 $$ = newNode(':',$4,$6) ;
391 $$ = newNode('?',$1,$$) ;
397 | cast_expr assignment_operator assignment_expr
402 $$ = newNode($2,$1,$3);
405 $$ = createRMW($1, '*', $3);
408 $$ = createRMW($1, '/', $3);
411 $$ = createRMW($1, '%', $3);
414 $$ = createRMW($1, '+', $3);
417 $$ = createRMW($1, '-', $3);
420 $$ = createRMW($1, LEFT_OP, $3);
423 $$ = createRMW($1, RIGHT_OP, $3);
426 $$ = createRMW($1, '&', $3);
429 $$ = createRMW($1, '^', $3);
432 /* $$ = newNode('=',$1,newNode('|',removeIncDecOps(copyAst($1)),$3)); */
433 /* $$ = newNode('=',removePostIncDecOps(copyAst($1)),
434 newNode('|',removePreIncDecOps(copyAst($1)),$3)); */
435 $$ = createRMW($1, '|', $3);
460 | expr ',' { seqPointNo++;} assignment_expr { $$ = newNode(',',$1,$4);}
468 : declaration_specifiers ';'
471 werror(W_USELESS_DECL);
475 | declaration_specifiers init_declarator_list ';'
477 /* add the specifier list to the id */
480 for (sym1 = sym = reverseSyms($2);sym != NULL;sym = sym->next) {
481 sym_link *lnk = copyLinkChain($1);
482 if (options.unsigned_char && SPEC_NOUN(lnk) == V_CHAR && !lnk->select.s.b_signed)
484 /* do the pointer stuff */
485 pointerTypes(sym->type,lnk);
486 addDecl (sym,0,lnk) ;
494 declaration_specifiers
495 : storage_class_specifier { $$ = $1; }
496 | storage_class_specifier declaration_specifiers {
497 /* if the decl $2 is not a specifier */
498 /* find the spec and replace it */
501 while (lnk && !IS_SPEC(lnk->next))
503 lnk->next = mergeSpec($1,lnk->next, "storage_class_specifier declaration_specifiers - skipped");
507 $$ = mergeSpec($1,$2, "storage_class_specifier declaration_specifiers");
509 | type_specifier { $$ = $1; }
510 | type_specifier declaration_specifiers {
511 /* if the decl $2 is not a specifier */
512 /* find the spec and replace it */
515 while (lnk && !IS_SPEC(lnk->next))
517 lnk->next = mergeSpec($1,lnk->next, "type_specifier declaration_specifiers - skipped");
521 $$ = mergeSpec($1,$2, "type_specifier declaration_specifiers");
527 | init_declarator_list ',' init_declarator { $3->next = $1 ; $$ = $3;}
531 : declarator { $1->ival = NULL ; }
532 | declarator '=' initializer { $1->ival = $3 ; }
536 storage_class_specifier
538 $$ = newLink (SPECIFIER) ;
539 SPEC_TYPEDEF($$) = 1 ;
542 $$ = newLink(SPECIFIER);
546 $$ = newLink (SPECIFIER);
550 $$ = newLink (SPECIFIER) ;
551 SPEC_SCLS($$) = S_AUTO ;
554 $$ = newLink (SPECIFIER);
555 SPEC_SCLS($$) = S_REGISTER ;
560 : INTERRUPT { $$ = INTNO_UNSPEC ; }
561 | INTERRUPT constant_expr
562 { int intno = (int) floatFromVal(constExprValue($2,TRUE));
563 if ((intno >= 0) && (intno <= INTNO_MAX))
567 werror(E_INT_BAD_INTNO, intno);
575 | type_specifier2 AT constant_expr
577 /* add this to the storage class specifier */
578 SPEC_ABSA($1) = 1; /* set the absolute addr flag */
579 /* now get the abs addr from value */
580 SPEC_ADDR($1) = (unsigned) floatFromVal(constExprValue($3,TRUE)) ;
586 $$=newLink(SPECIFIER);
587 SPEC_NOUN($$) = V_CHAR ;
588 ignoreTypedefType = 1;
591 $$=newLink(SPECIFIER);
593 ignoreTypedefType = 1;
596 $$=newLink(SPECIFIER);
597 SPEC_NOUN($$) = V_INT ;
598 ignoreTypedefType = 1;
601 $$=newLink(SPECIFIER);
603 ignoreTypedefType = 1;
606 $$=newLink(SPECIFIER);
607 $$->select.s.b_signed = 1;
608 ignoreTypedefType = 1;
611 $$=newLink(SPECIFIER);
613 ignoreTypedefType = 1;
616 $$=newLink(SPECIFIER);
617 SPEC_NOUN($$) = V_VOID ;
618 ignoreTypedefType = 1;
621 $$=newLink(SPECIFIER);
625 $$=newLink(SPECIFIER);
626 SPEC_VOLATILE($$) = 1 ;
629 $$=newLink(SPECIFIER);
630 SPEC_NOUN($$) = V_FLOAT;
631 ignoreTypedefType = 1;
634 $$=newLink(SPECIFIER);
635 SPEC_NOUN($$) = V_FIXED16X16;
636 ignoreTypedefType = 1;
639 $$ = newLink (SPECIFIER);
640 SPEC_SCLS($$) = S_XDATA ;
643 $$ = newLink (SPECIFIER) ;
644 SPEC_SCLS($$) = S_CODE ;
647 $$ = newLink (SPECIFIER) ;
648 SPEC_SCLS($$) = S_EEPROM ;
651 $$ = newLink (SPECIFIER);
652 SPEC_SCLS($$) = S_DATA ;
655 $$ = newLink (SPECIFIER);
656 SPEC_SCLS($$) = S_IDATA ;
659 $$ = newLink (SPECIFIER);
660 SPEC_SCLS($$) = S_PDATA ;
663 $$=newLink(SPECIFIER);
664 SPEC_NOUN($$) = V_BIT ;
665 SPEC_SCLS($$) = S_BIT ;
668 ignoreTypedefType = 1;
671 | struct_or_union_specifier {
674 ignoreTypedefType = 1;
679 ignoreTypedefType = 1;
686 sym = findSym(TypedefTab,NULL,$1) ;
687 $$ = p = copyLinkChain(sym->type);
688 SPEC_TYPEDEF(getSpec(p)) = 0;
689 ignoreTypedefType = 1;
696 $$ = newLink(SPECIFIER) ;
697 SPEC_NOUN($$) = V_SBIT;
698 SPEC_SCLS($$) = S_SBIT;
701 ignoreTypedefType = 1;
708 $$ = newLink(SPECIFIER) ;
709 FUNC_REGBANK($$) = 0;
710 SPEC_NOUN($$) = V_CHAR;
711 SPEC_SCLS($$) = S_SFR ;
713 ignoreTypedefType = 1;
716 $$ = newLink(SPECIFIER) ;
717 FUNC_REGBANK($$) = 1;
718 SPEC_NOUN($$) = V_CHAR;
719 SPEC_SCLS($$) = S_SFR ;
721 ignoreTypedefType = 1;
727 $$ = newLink(SPECIFIER) ;
728 FUNC_REGBANK($$) = 0;
729 SPEC_NOUN($$) = V_INT;
730 SPEC_SCLS($$) = S_SFR;
732 ignoreTypedefType = 1;
738 $$ = newLink(SPECIFIER) ;
739 FUNC_REGBANK($$) = 0;
740 SPEC_NOUN($$) = V_INT;
741 SPEC_SCLS($$) = S_SFR;
744 ignoreTypedefType = 1;
748 struct_or_union_specifier
749 : struct_or_union opt_stag
758 werror(E_BAD_TAG, $2->tag, $1==STRUCT ? "struct" : "union");
762 '{' struct_declaration_list '}'
767 // check for errors in structure members
768 for (sym=$5; sym; sym=sym->next) {
769 if (IS_ABSOLUTE(sym->etype)) {
770 werrorfl(sym->fileDef, sym->lineDef, E_NOT_ALLOWED, "'at'");
771 SPEC_ABSA(sym->etype) = 0;
773 if (IS_SPEC(sym->etype) && SPEC_SCLS(sym->etype)) {
774 werrorfl(sym->fileDef, sym->lineDef, E_NOT_ALLOWED, "storage class");
775 printTypeChainRaw (sym->type,NULL);
776 SPEC_SCLS(sym->etype) = 0;
778 for (dsym=sym->next; dsym; dsym=dsym->next) {
779 if (*dsym->name && strcmp(sym->name, dsym->name)==0) {
780 werrorfl(sym->fileDef, sym->lineDef, E_DUPLICATE_MEMBER,
781 $1==STRUCT ? "struct" : "union", sym->name);
782 werrorfl(dsym->fileDef, dsym->lineDef, E_PREVIOUS_DEF);
787 /* Create a structdef */
789 sdef->fields = reverseSyms($5) ; /* link the fields */
790 sdef->size = compStructSize($1,sdef); /* update size of */
791 promoteAnonStructs ($1, sdef);
793 /* Create the specifier */
794 $$ = newLink (SPECIFIER) ;
795 SPEC_NOUN($$) = V_STRUCT;
796 SPEC_STRUCT($$)= sdef ;
798 | struct_or_union stag
800 $$ = newLink(SPECIFIER) ;
801 SPEC_NOUN($$) = V_STRUCT;
802 SPEC_STRUCT($$) = $2;
811 werror(E_BAD_TAG, $2->tag, $1==STRUCT ? "struct" : "union");
817 : STRUCT { $$ = STRUCT ; }
818 | UNION { $$ = UNION ; }
823 | { /* synthesize a name add to structtable */
824 $$ = newStruct(genSymName(NestLevel)) ;
825 $$->level = NestLevel ;
826 addSym (StructTab, $$, $$->tag,$$->level,currBlockno, 0);
830 : identifier { /* add name to structure table */
831 $$ = findSymWithBlock (StructTab,$1,currBlockno);
833 $$ = newStruct($1->name) ;
834 $$->level = NestLevel ;
835 addSym (StructTab, $$, $$->tag,$$->level,currBlockno,0);
840 struct_declaration_list
842 | struct_declaration_list struct_declaration
846 /* go to the end of the chain */
847 while (sym->next) sym=sym->next;
855 : type_specifier_list struct_declarator_list ';'
857 /* add this type to all the symbols */
859 for ( sym = $2 ; sym != NULL ; sym = sym->next ) {
860 sym_link *btype = copyLinkChain($1);
861 if (options.unsigned_char && SPEC_NOUN(btype) == V_CHAR && !(btype)->select.s.b_signed)
862 SPEC_USIGN(btype) = 1;
864 /* make the symbol one level up */
867 pointerTypes(sym->type,btype);
870 sym->etype = getSpec(sym->type);
873 addDecl (sym,0,btype);
874 /* make sure the type is complete and sane */
875 checkTypeSanity(sym->etype, sym->name);
877 ignoreTypedefType = 0;
882 struct_declarator_list
884 | struct_declarator_list ',' struct_declarator
893 | ':' constant_expr {
894 unsigned int bitsize;
895 $$ = newSymbol (genSymName(NestLevel),NestLevel) ;
896 bitsize= (unsigned int) floatFromVal(constExprValue($2,TRUE));
897 if (bitsize > (port->s.int_size * 8)) {
898 bitsize = port->s.int_size * 8;
899 werror(E_BITFLD_SIZE, bitsize);
902 bitsize = BITVAR_PAD;
903 $$->bitVar = bitsize;
905 | declarator ':' constant_expr
907 unsigned int bitsize;
908 bitsize= (unsigned int) floatFromVal(constExprValue($3,TRUE));
909 if (bitsize > (port->s.int_size * 8)) {
910 bitsize = port->s.int_size * 8;
911 werror(E_BITFLD_SIZE, bitsize);
914 $$ = newSymbol (genSymName(NestLevel),NestLevel) ;
915 $$->bitVar = BITVAR_PAD;
916 werror(W_BITFLD_NAMED);
919 $1->bitVar = bitsize;
921 | { $$ = newSymbol ("", NestLevel) ; }
926 : ENUM '{' enumerator_list '}' {
927 $$ = newEnumType ($3); //copyLinkChain(cenum->type);
928 SPEC_SCLS(getSpec($$)) = 0;
931 | ENUM identifier '{' enumerator_list '}' {
935 csym=findSym(enumTab,$2,$2->name);
936 if ((csym && csym->level == $2->level))
938 werrorfl($2->fileDef, $2->lineDef, E_DUPLICATE_TYPEDEF,csym->name);
939 werrorfl(csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
942 enumtype = newEnumType ($4); //copyLinkChain(cenum->type);
943 SPEC_SCLS(getSpec(enumtype)) = 0;
946 /* add this to the enumerator table */
948 addSym ( enumTab,$2,$2->name,$2->level,$2->block, 0);
949 $$ = copyLinkChain(enumtype);
954 /* check the enumerator table */
955 if ((csym = findSym(enumTab,$2,$2->name)))
956 $$ = copyLinkChain(csym->type);
958 $$ = newLink(SPECIFIER) ;
959 SPEC_NOUN($$) = V_INT ;
966 | enumerator_list ','
967 | enumerator_list ',' enumerator
975 : identifier opt_assign_expr
979 /* make the symbol one level up */
981 // check if the symbol at the same level already exists
982 if ((sym = findSymWithLevel (SymbolTab, $1)) &&
983 sym->level == $1->level)
985 werrorfl ($1->fileDef, $1->lineDef, E_DUPLICATE_MEMBER, "enum", $1->name);
986 werrorfl (sym->fileDef, sym->lineDef, E_PREVIOUS_DEF);
988 $1->type = copyLinkChain ($2->type);
989 $1->etype= getSpec ($1->type);
990 SPEC_ENUM ($1->etype) = 1;
992 // do this now, so we can use it for the next enums in the list
998 : '=' constant_expr {
1001 val = constExprValue($2,TRUE);
1002 if (!IS_INT(val->type) && !IS_CHAR(val->type))
1004 werror(E_ENUM_NON_INTEGER);
1005 SNPRINTF(lbuff, sizeof(lbuff),
1006 "%d",(int) floatFromVal(val));
1007 val = constVal(lbuff);
1013 SNPRINTF(lbuff, sizeof(lbuff),
1014 "%d",(int) floatFromVal(cenum)+1);
1015 $$ = cenum = constVal(lbuff);
1018 $$ = cenum = constVal("0");
1024 : declarator3 { $$ = $1 ; }
1025 | pointer declarator3
1027 addDecl ($2,0,reverseLink($1));
1033 : declarator2_function_attributes { $$ = $1 ; }
1034 | declarator2 { $$ = $1 ; }
1038 : declarator2_function_attributes { $$ = $1; }
1039 | pointer declarator2_function_attributes
1041 addDecl ($2,0,reverseLink($1));
1046 declarator2_function_attributes
1047 : function_declarator2 { $$ = $1 ; }
1048 | function_declarator2 function_attribute {
1049 // copy the functionAttributes (not the args and hasVargs !!)
1052 sym_link *funcType=$1->type;
1054 while (funcType && !IS_FUNC(funcType))
1055 funcType = funcType->next;
1058 werror (E_FUNC_ATTR);
1061 args=FUNC_ARGS(funcType);
1062 hasVargs=FUNC_HASVARARGS(funcType);
1064 memcpy (&funcType->funcAttrs, &$2->funcAttrs,
1065 sizeof($2->funcAttrs));
1067 FUNC_ARGS(funcType)=args;
1068 FUNC_HASVARARGS(funcType)=hasVargs;
1071 memset (&$2->funcAttrs, 0,
1072 sizeof($2->funcAttrs));
1081 | '(' declarator ')' { $$ = $2; }
1082 | declarator3 '[' ']'
1086 p = newLink (DECLARATOR);
1087 DCL_TYPE(p) = ARRAY ;
1091 | declarator3 '[' constant_expr ']'
1096 tval = constExprValue($3,TRUE);
1097 /* if it is not a constant then Error */
1098 p = newLink (DECLARATOR);
1099 DCL_TYPE(p) = ARRAY ;
1100 if ( !tval || (SPEC_SCLS(tval->etype) != S_LITERAL)) {
1101 werror(E_CONST_EXPECTED) ;
1102 /* Assume a single item array to limit the cascade */
1103 /* of additional errors. */
1107 DCL_ELEM(p) = (int) floatFromVal(tval) ;
1113 function_declarator2
1114 : declarator2 '(' ')' { addDecl ($1,FUNCTION,NULL) ; }
1115 | declarator2 '(' { NestLevel++ ; currBlockno++; }
1116 parameter_type_list ')'
1120 addDecl ($1,FUNCTION,NULL) ;
1122 funcType = $1->type;
1123 while (funcType && !IS_FUNC(funcType))
1124 funcType = funcType->next;
1128 FUNC_HASVARARGS(funcType) = IS_VARG($4);
1129 FUNC_ARGS(funcType) = reverseVal($4);
1131 /* nest level was incremented to take care of the parms */
1135 // if this was a pointer (to a function)
1136 if (!IS_FUNC($1->type))
1137 cleanUpLevel(SymbolTab,NestLevel+1);
1141 | declarator2 '(' identifier_list ')'
1143 werror(E_OLD_STYLE,$1->name) ;
1144 /* assume it returns an int */
1145 $1->type = $1->etype = newIntLink();
1151 : unqualified_pointer { $$ = $1 ;}
1152 | unqualified_pointer type_specifier_list
1157 DCL_PTR_CONST($1) = SPEC_CONST($2);
1158 DCL_PTR_VOLATILE($1) = SPEC_VOLATILE($2);
1161 werror (W_PTR_TYPE_INVALID);
1163 | unqualified_pointer pointer
1167 DCL_TYPE($2)=port->unqualified_pointer;
1169 | unqualified_pointer type_specifier_list pointer
1172 if (IS_SPEC($2) && DCL_TYPE($3) == UPOINTER) {
1173 DCL_PTR_CONST($1) = SPEC_CONST($2);
1174 DCL_PTR_VOLATILE($1) = SPEC_VOLATILE($2);
1175 switch (SPEC_SCLS($2)) {
1177 DCL_TYPE($3) = FPOINTER;
1180 DCL_TYPE($3) = IPOINTER ;
1183 DCL_TYPE($3) = PPOINTER ;
1186 DCL_TYPE($3) = POINTER ;
1189 DCL_TYPE($3) = CPOINTER ;
1192 DCL_TYPE($3) = EEPPOINTER;
1195 // this could be just "constant"
1196 // werror(W_PTR_TYPE_INVALID);
1201 werror (W_PTR_TYPE_INVALID);
1209 $$ = newLink(DECLARATOR);
1210 DCL_TYPE($$)=UPOINTER;
1216 //| type_specifier_list type_specifier { $$ = mergeSpec ($1,$2, "type_specifier_list"); }
1217 | type_specifier_list type_specifier {
1218 /* if the decl $2 is not a specifier */
1219 /* find the spec and replace it */
1220 if ( !IS_SPEC($2)) {
1221 sym_link *lnk = $2 ;
1222 while (lnk && !IS_SPEC(lnk->next))
1224 lnk->next = mergeSpec($1,lnk->next, "type_specifier_list type_specifier skipped");
1228 $$ = mergeSpec($1,$2, "type_specifier_list type_specifier");
1234 | identifier_list ',' identifier
1243 | parameter_list ',' VAR_ARGS { $1->vArgs = 1;}
1247 : parameter_declaration
1248 | parameter_list ',' parameter_declaration
1255 parameter_declaration
1256 : type_specifier_list declarator
1259 pointerTypes($2->type,$1);
1260 if (options.unsigned_char && SPEC_NOUN($1) == V_CHAR && !($1)->select.s.b_signed)
1263 for (loop=$2;loop;loop->_isparm=1,loop=loop->next);
1266 ignoreTypedefType = 0;
1270 if (options.unsigned_char && SPEC_NOUN($1) == V_CHAR && !($1)->select.s.b_signed)
1273 $$->etype = getSpec($$->type);
1274 ignoreTypedefType = 0;
1279 : type_specifier_list { $$ = $1; ignoreTypedefType = 0;}
1280 | type_specifier_list abstract_declarator
1282 /* go to the end of the list */
1284 pointerTypes($2,$1);
1285 for ( p = $2 ; p && p->next ; p=p->next);
1287 werror(E_SYNTAX_ERROR, yytext);
1292 ignoreTypedefType = 0;
1297 : pointer { $$ = reverseLink($1); }
1298 | abstract_declarator2
1299 | pointer abstract_declarator2 { $1 = reverseLink($1); $1->next = $2 ; $$ = $1;
1300 if (IS_PTR($1) && IS_FUNC($2))
1301 DCL_TYPE($1) = CPOINTER;
1305 abstract_declarator2
1306 : '(' abstract_declarator ')' { $$ = $2 ; }
1308 $$ = newLink (DECLARATOR);
1309 DCL_TYPE($$) = ARRAY ;
1312 | '[' constant_expr ']' {
1314 $$ = newLink (DECLARATOR);
1315 DCL_TYPE($$) = ARRAY ;
1316 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($2,TRUE));
1318 | abstract_declarator2 '[' ']' {
1319 $$ = newLink (DECLARATOR);
1320 DCL_TYPE($$) = ARRAY ;
1324 | abstract_declarator2 '[' constant_expr ']'
1327 $$ = newLink (DECLARATOR);
1328 DCL_TYPE($$) = ARRAY ;
1329 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($3,TRUE));
1332 | '(' ')' { $$ = NULL;}
1333 | '(' parameter_type_list ')' { $$ = NULL;}
1334 | abstract_declarator2 '(' ')' {
1335 // $1 must be a pointer to a function
1336 sym_link *p=newLink(DECLARATOR);
1337 DCL_TYPE(p) = FUNCTION;
1339 // ((void (code *) ()) 0) ()
1340 $1=newLink(DECLARATOR);
1341 DCL_TYPE($1)=CPOINTER;
1346 | abstract_declarator2 '(' { NestLevel++ ; currBlockno++; } parameter_type_list ')' {
1347 sym_link *p=newLink(DECLARATOR);
1348 DCL_TYPE(p) = FUNCTION;
1350 FUNC_HASVARARGS(p) = IS_VARG($4);
1351 FUNC_ARGS(p) = reverseVal($4);
1353 /* nest level was incremented to take care of the parms */
1357 /* ((void (code *) (void)) 0) () */
1358 $1=newLink(DECLARATOR);
1359 DCL_TYPE($1)=CPOINTER;
1364 // remove the symbol args (if any)
1365 cleanUpLevel(SymbolTab,NestLevel+1);
1370 : assignment_expr { $$ = newiList(INIT_NODE,$1); }
1371 | '{' initializer_list '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1372 | '{' initializer_list ',' '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1377 | initializer_list ',' initializer { $3->next = $1; $$ = $3; }
1382 | compound_statement
1383 | expression_statement
1384 | selection_statement
1385 | iteration_statement
1387 | critical_statement
1391 ex = newNode(INLINEASM,NULL,NULL);
1392 ex->values.inlineasm = strdup($1);
1401 STACK_PUSH(continueStack,NULL);
1402 STACK_PUSH(breakStack,NULL);
1408 : critical statement {
1409 STACK_POP(breakStack);
1410 STACK_POP(continueStack);
1412 $$ = newNode(CRITICAL,$2,NULL);
1417 // : identifier ':' statement { $$ = createLabel($1,$3); }
1418 : identifier ':' { $$ = createLabel($1,NULL);
1420 | CASE constant_expr ':'
1422 if (STACK_EMPTY(swStk))
1423 $$ = createCase(NULL,$2,NULL);
1425 $$ = createCase(STACK_PEEK(swStk),$2,NULL);
1427 | DEFAULT { $<asts>$ = newNode(DEFAULT,NULL,NULL); } ':'
1429 if (STACK_EMPTY(swStk))
1430 $$ = createDefault(NULL,$<asts>2,NULL);
1432 $$ = createDefault(STACK_PEEK(swStk),$<asts>2,NULL);
1438 STACK_PUSH(blockNum,currBlockno);
1439 currBlockno = ++blockNo ;
1440 ignoreTypedefType = 0;
1444 end_block : '}' { currBlockno = STACK_POP(blockNum); }
1448 : start_block end_block { $$ = createBlock(NULL, NULL); }
1449 | start_block statement_list end_block { $$ = createBlock(NULL, $2); }
1450 | start_block declaration_list end_block { $$ = createBlock($2, NULL); }
1452 declaration_list statement_list
1453 end_block {$$ = createBlock($2, $3); }
1454 | error ';' { $$ = NULL ; }
1460 /* if this is typedef declare it immediately */
1461 if ( $1 && IS_TYPEDEF($1->etype)) {
1462 allocVariables ($1);
1467 ignoreTypedefType = 0;
1471 | declaration_list declaration
1475 /* if this is a typedef */
1476 if ($2 && IS_TYPEDEF($2->etype)) {
1477 allocVariables ($2);
1481 /* get to the end of the previous decl */
1491 ignoreTypedefType = 0;
1498 | statement_list statement { $$ = newNode(NULLOP,$1,$2) ;}
1501 expression_statement
1503 | expr ';' { $$ = $1; seqPointNo++;}
1507 : ELSE statement { $$ = $2 ; }
1513 : IF '(' expr ')' { seqPointNo++;} statement else_statement
1516 $$ = createIf ($3, $6, $7 );
1519 | SWITCH '(' expr ')' {
1521 static int swLabel = 0 ;
1524 /* create a node for expression */
1525 ex = newNode(SWITCH,$3,NULL);
1526 STACK_PUSH(swStk,ex); /* save it in the stack */
1527 ex->values.switchVals.swNum = swLabel ;
1529 /* now create the label */
1530 SNPRINTF(lbuff, sizeof(lbuff),
1531 "_swBrk_%d",swLabel++);
1532 $<sym>$ = newSymbol(lbuff,NestLevel);
1533 /* put label in the break stack */
1534 STACK_PUSH(breakStack,$<sym>$);
1537 /* get back the switch form the stack */
1538 $$ = STACK_POP(swStk) ;
1539 $$->right = newNode (NULLOP,$6,createLabel($<sym>5,NULL));
1540 STACK_POP(breakStack);
1544 while : WHILE { /* create and push the continue , break & body labels */
1545 static int Lblnum = 0 ;
1547 SNPRINTF (lbuff, sizeof(lbuff), "_whilecontinue_%d",Lblnum);
1548 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1550 SNPRINTF (lbuff, sizeof(lbuff), "_whilebreak_%d",Lblnum);
1551 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1553 SNPRINTF (lbuff, sizeof(lbuff), "_whilebody_%d",Lblnum++);
1554 $$ = newSymbol(lbuff,NestLevel);
1558 do : DO { /* create and push the continue , break & body Labels */
1559 static int Lblnum = 0 ;
1562 SNPRINTF(lbuff, sizeof(lbuff), "_docontinue_%d",Lblnum);
1563 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1565 SNPRINTF(lbuff, sizeof(lbuff), "_dobreak_%d",Lblnum);
1566 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1568 SNPRINTF(lbuff, sizeof(lbuff), "_dobody_%d",Lblnum++);
1569 $$ = newSymbol (lbuff,NestLevel);
1573 for : FOR { /* create & push continue, break & body labels */
1574 static int Lblnum = 0 ;
1577 SNPRINTF(lbuff, sizeof(lbuff), "_forcontinue_%d",Lblnum);
1578 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1580 SNPRINTF(lbuff, sizeof(lbuff), "_forbreak_%d",Lblnum);
1581 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1583 SNPRINTF(lbuff, sizeof(lbuff), "_forbody_%d",Lblnum);
1584 $$ = newSymbol(lbuff,NestLevel);
1586 SNPRINTF(lbuff, sizeof(lbuff), "_forcond_%d",Lblnum++);
1587 STACK_PUSH(forStack,newSymbol(lbuff,NestLevel));
1592 : while '(' expr ')' { seqPointNo++;} statement
1595 $$ = createWhile ( $1, STACK_POP(continueStack),
1596 STACK_POP(breakStack), $3, $6 );
1597 $$->lineno = $1->lineDef ;
1600 | do statement WHILE '(' expr ')' ';'
1604 $$ = createDo ( $1 , STACK_POP(continueStack),
1605 STACK_POP(breakStack), $5, $2);
1606 $$->lineno = $1->lineDef ;
1609 | for '(' expr_opt ';' expr_opt ';' expr_opt ')' statement
1613 /* if break or continue statement present
1614 then create a general case loop */
1615 if (STACK_PEEK(continueStack)->isref ||
1616 STACK_PEEK(breakStack)->isref) {
1617 $$ = createFor ($1, STACK_POP(continueStack),
1618 STACK_POP(breakStack) ,
1619 STACK_POP(forStack) ,
1622 $$ = newNode(FOR,$9,NULL);
1623 AST_FOR($$,trueLabel) = $1;
1624 AST_FOR($$,continueLabel) = STACK_POP(continueStack);
1625 AST_FOR($$,falseLabel) = STACK_POP(breakStack);
1626 AST_FOR($$,condLabel) = STACK_POP(forStack) ;
1627 AST_FOR($$,initExpr) = $3;
1628 AST_FOR($$,condExpr) = $5;
1629 AST_FOR($$,loopExpr) = $7;
1637 : { $$ = NULL ; seqPointNo++; }
1638 | expr { $$ = $1 ; seqPointNo++; }
1642 : GOTO identifier ';' {
1644 $$ = newAst_VALUE(symbolVal($2));
1645 $$ = newNode(GOTO,$$,NULL);
1648 /* make sure continue is in context */
1649 if (STACK_EMPTY(continueStack) || STACK_PEEK(continueStack) == NULL) {
1650 werror(E_BREAK_CONTEXT);
1654 $$ = newAst_VALUE(symbolVal(STACK_PEEK(continueStack)));
1655 $$ = newNode(GOTO,$$,NULL);
1656 /* mark the continue label as referenced */
1657 STACK_PEEK(continueStack)->isref = 1;
1661 if (STACK_EMPTY(breakStack) || STACK_PEEK(breakStack) == NULL) {
1662 werror(E_BREAK_CONTEXT);
1665 $$ = newAst_VALUE(symbolVal(STACK_PEEK(breakStack)));
1666 $$ = newNode(GOTO,$$,NULL);
1667 STACK_PEEK(breakStack)->isref = 1;
1673 werror(E_INVALID_CRITICAL);
1676 $$ = newNode(RETURN,NULL,NULL);
1682 werror(E_INVALID_CRITICAL);
1685 $$ = newNode(RETURN,NULL,$2);
1691 : IDENTIFIER { $$ = newSymbol ($1,NestLevel) ; }