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 */
50 char lbuff[1024]; /* local buffer */
52 /* break & continue stacks */
53 STACK_DCL(continueStack ,symbol *,MAX_NEST_LEVEL)
54 STACK_DCL(breakStack ,symbol *,MAX_NEST_LEVEL)
55 STACK_DCL(forStack ,symbol *,MAX_NEST_LEVEL)
56 STACK_DCL(swStk ,ast *,MAX_NEST_LEVEL)
57 STACK_DCL(blockNum,int,MAX_NEST_LEVEL*3)
59 value *cenum = NULL ; /* current enumeration type chain*/
65 symbol *sym ; /* symbol table pointer */
66 structdef *sdef; /* structure definition */
67 char yychar[SDCC_NAME_MAX+1];
68 sym_link *lnk ; /* declarator or specifier */
69 int yyint; /* integer value returned */
70 value *val ; /* for integer constant */
71 initList *ilist; /* initial list */
72 char *yyinline; /* inlined assembler code */
73 ast *asts; /* expression tree */
76 %token <yychar> IDENTIFIER TYPE_NAME
77 %token <val> CONSTANT STRING_LITERAL
79 %token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
81 %token <yyint> MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
82 %token <yyint> SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
83 %token <yyint> XOR_ASSIGN OR_ASSIGN
84 %token TYPEDEF EXTERN STATIC AUTO REGISTER CODE EEPROM INTERRUPT SFR AT SBIT
85 %token REENTRANT USING XDATA DATA IDATA PDATA VAR_ARGS CRITICAL NONBANKED BANKED
86 %token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE CONST VOLATILE VOID BIT
87 %token STRUCT UNION ENUM ELIPSIS RANGE FAR
88 %token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
89 %token NAKED JAVANATIVE OVERLAY
90 %token <yyinline> INLINEASM
91 %token IFX ADDRESS_OF GET_VALUE_AT_ADDRESS SPIL UNSPIL GETHBIT
92 %token BITWISEAND UNARYMINUS IPUSH IPOP PCALL ENDFUNCTION JUMPTABLE
94 %token CAST CALL PARAM NULLOP BLOCK LABEL RECEIVE SEND ARRAYINIT
96 %type <yyint> Interrupt_storage
97 %type <sym> identifier declarator declarator2 enumerator_list enumerator
98 %type <sym> struct_declarator
99 %type <sym> struct_declarator_list struct_declaration struct_declaration_list
100 %type <sym> declaration init_declarator_list init_declarator
101 %type <sym> declaration_list identifier_list parameter_identifier_list
102 %type <sym> declarator2_function_attributes while do for
103 %type <lnk> pointer type_specifier_list type_specifier type_name
104 %type <lnk> storage_class_specifier struct_or_union_specifier
105 %type <lnk> declaration_specifiers sfr_reg_bit type_specifier2
106 %type <lnk> function_attribute function_attributes enum_specifier
107 %type <lnk> abstract_declarator abstract_declarator2 unqualified_pointer
108 %type <val> parameter_type_list parameter_list parameter_declaration opt_assign_expr
109 %type <sdef> stag opt_stag
110 %type <asts> primary_expr
111 %type <asts> postfix_expr unary_expr cast_expr multiplicative_expr
112 %type <asts> additive_expr shift_expr relational_expr equality_expr
113 %type <asts> and_expr exclusive_or_expr inclusive_or_expr logical_or_expr
114 %type <asts> logical_and_expr conditional_expr assignment_expr constant_expr
115 %type <asts> expr argument_expr_list function_definition expr_opt
116 %type <asts> statement_list statement labeled_statement compound_statement
117 %type <asts> expression_statement selection_statement iteration_statement
118 %type <asts> jump_statement function_body else_statement string_literal
119 %type <ilist> initializer initializer_list
120 %type <yyint> unary_operator assignment_operator struct_or_union
127 : external_definition
128 | file external_definition
132 : function_definition {
137 && IS_FUNC($1->type))
139 /* The only legal storage classes for
140 * a function prototype (declaration)
141 * are extern and static. extern is the
142 * default. Thus, if this function isn't
143 * explicitly marked static, mark it
147 && IS_SPEC($1->etype)
148 && !SPEC_STAT($1->etype))
150 SPEC_EXTR($1->etype) = 1;
154 allocVariables ($1) ;
155 cleanUpLevel (SymbolTab,1);
160 : declarator function_body { /* function type not specified */
161 /* assume it to be 'int' */
162 addDecl($1,0,newIntLink());
163 $$ = createFunction($1,$2);
165 | declaration_specifiers declarator function_body
167 pointerTypes($2->type,copyLinkChain($1));
169 $$ = createFunction($2,$3);
174 : function_attributes
175 | function_attributes function_attribute { $$ = mergeSpec($1,$2,"function_attribute"); }
180 $$ = newLink(SPECIFIER) ;
181 FUNC_REGBANK($$) = (int) floatFromVal($2);
183 | REENTRANT { $$ = newLink (SPECIFIER);
186 | CRITICAL { $$ = newLink (SPECIFIER);
187 FUNC_ISCRITICAL($$) = 1;
189 | NAKED { $$ = newLink (SPECIFIER);
192 | JAVANATIVE { $$ = newLink (SPECIFIER);
193 FUNC_ISJAVANATIVE($$)=1;
195 | OVERLAY { $$ = newLink (SPECIFIER);
196 FUNC_ISOVERLAY($$)=1;
198 | NONBANKED {$$ = newLink (SPECIFIER);
199 FUNC_NONBANKED($$) = 1;
200 if (FUNC_BANKED($$)) {
201 werror(W_BANKED_WITH_NONBANKED);
204 | BANKED {$$ = newLink (SPECIFIER);
206 if (FUNC_NONBANKED($$)) {
207 werror(W_BANKED_WITH_NONBANKED);
210 werror(W_BANKED_WITH_STATIC);
215 $$ = newLink (SPECIFIER) ;
216 FUNC_INTNO($$) = $1 ;
223 | declaration_list compound_statement
225 werror(E_OLD_STYLE,($1 ? $1->name: "")) ;
231 : identifier { $$ = newAst_VALUE(symbolVal($1)); }
232 | CONSTANT { $$ = newAst_VALUE($1); }
234 | '(' expr ')' { $$ = $2 ; }
238 : STRING_LITERAL { $$ = newAst_VALUE($1); }
243 | postfix_expr '[' expr ']' { $$ = newNode ('[', $1, $3) ; }
244 | postfix_expr '(' ')' { $$ = newNode (CALL,$1,NULL);
245 $$->left->funcName = 1;}
246 | postfix_expr '(' argument_expr_list ')'
248 $$ = newNode (CALL,$1,$3) ; $$->left->funcName = 1;
250 | postfix_expr '.' identifier
252 $3 = newSymbol($3->name,NestLevel);
254 $$ = newNode(PTR_OP,newNode('&',$1,NULL),newAst_VALUE(symbolVal($3)));
255 /* $$ = newNode('.',$1,newAst(EX_VALUE,symbolVal($3))) ; */
257 | postfix_expr PTR_OP identifier
259 $3 = newSymbol($3->name,NestLevel);
261 $$ = newNode(PTR_OP,$1,newAst_VALUE(symbolVal($3)));
263 | postfix_expr INC_OP
264 { $$ = newNode(INC_OP,$1,NULL);}
265 | postfix_expr DEC_OP
266 { $$ = newNode(DEC_OP,$1,NULL); }
271 | assignment_expr ',' argument_expr_list { $$ = newNode(PARAM,$1,$3); }
276 | INC_OP unary_expr { $$ = newNode(INC_OP,NULL,$2); }
277 | DEC_OP unary_expr { $$ = newNode(DEC_OP,NULL,$2); }
278 | unary_operator cast_expr { $$ = newNode($1,$2,NULL) ; }
279 | SIZEOF unary_expr { $$ = newNode(SIZEOF,NULL,$2); }
280 | SIZEOF '(' type_name ')' { $$ = newAst_VALUE(sizeofOp($3)); }
281 | TYPEOF unary_expr { $$ = newNode(TYPEOF,NULL,$2); }
295 | '(' type_name ')' cast_expr { $$ = newNode(CAST,newAst_LINK($2),$4); }
300 | multiplicative_expr '*' cast_expr { $$ = newNode('*',$1,$3);}
301 | multiplicative_expr '/' cast_expr { $$ = newNode('/',$1,$3);}
302 | multiplicative_expr '%' cast_expr { $$ = newNode('%',$1,$3);}
306 : multiplicative_expr
307 | additive_expr '+' multiplicative_expr { $$=newNode('+',$1,$3);}
308 | additive_expr '-' multiplicative_expr { $$=newNode('-',$1,$3);}
313 | shift_expr LEFT_OP additive_expr { $$ = newNode(LEFT_OP,$1,$3); }
314 | shift_expr RIGHT_OP additive_expr { $$ = newNode(RIGHT_OP,$1,$3); }
319 | relational_expr '<' shift_expr {
321 newNode('!',newNode(GE_OP,$1,$3),NULL) :
322 newNode('<', $1,$3));
324 | relational_expr '>' shift_expr {
326 newNode('!',newNode(LE_OP,$1,$3),NULL) :
329 | relational_expr LE_OP shift_expr {
331 newNode('!', newNode('>', $1 , $3 ), NULL) :
332 newNode(LE_OP,$1,$3));
334 | relational_expr GE_OP shift_expr {
336 newNode('!', newNode('<', $1 , $3 ), NULL) :
337 newNode(GE_OP,$1,$3));
343 | equality_expr EQ_OP relational_expr {
345 newNode('!',newNode(NE_OP,$1,$3),NULL) :
346 newNode(EQ_OP,$1,$3));
348 | equality_expr NE_OP relational_expr {
350 newNode('!', newNode(EQ_OP,$1,$3), NULL) :
351 newNode(NE_OP,$1,$3));
357 | and_expr '&' equality_expr { $$ = newNode('&',$1,$3);}
362 | exclusive_or_expr '^' and_expr { $$ = newNode('^',$1,$3);}
367 | inclusive_or_expr '|' exclusive_or_expr { $$ = newNode('|',$1,$3);}
372 | logical_and_expr AND_OP inclusive_or_expr
373 { $$ = newNode(AND_OP,$1,$3);}
378 | logical_or_expr OR_OP logical_and_expr
379 { $$ = newNode(OR_OP,$1,$3); }
384 | logical_or_expr '?' logical_or_expr ':' conditional_expr
386 $$ = newNode(':',$3,$5) ;
387 $$ = newNode('?',$1,$$) ;
393 | unary_expr assignment_operator assignment_expr
398 $$ = newNode($2,$1,$3);
401 $$ = newNode('=',$1,newNode('*',removeIncDecOps(copyAst($1)),$3));
404 $$ = newNode('=',$1,newNode('/',removeIncDecOps(copyAst($1)),$3));
407 $$ = newNode('=',$1,newNode('%',removeIncDecOps(copyAst($1)),$3));
410 $$ = newNode('=',$1,newNode('+',removeIncDecOps(copyAst($1)),$3));
413 $$ = newNode('=',$1,newNode('-',removeIncDecOps(copyAst($1)),$3));
416 $$ = newNode('=',$1,newNode(LEFT_OP,removeIncDecOps(copyAst($1)),$3));
419 $$ = newNode('=',$1,newNode(RIGHT_OP,removeIncDecOps(copyAst($1)),$3));
422 $$ = newNode('=',$1,newNode('&',removeIncDecOps(copyAst($1)),$3));
425 $$ = newNode('=',$1,newNode('^',removeIncDecOps(copyAst($1)),$3));
428 $$ = newNode('=',$1,newNode('|',removeIncDecOps(copyAst($1)),$3));
453 | expr ',' assignment_expr { $$ = newNode(',',$1,$3);}
461 : declaration_specifiers ';' { $$ = NULL ; }
462 | declaration_specifiers init_declarator_list ';'
464 /* add the specifier list to the id */
467 for (sym1 = sym = reverseSyms($2);sym != NULL;sym = sym->next) {
468 sym_link *lnk = copyLinkChain($1);
469 /* do the pointer stuff */
470 pointerTypes(sym->type,lnk);
471 addDecl (sym,0,lnk) ;
478 declaration_specifiers
479 : storage_class_specifier { $$ = $1; }
480 | storage_class_specifier declaration_specifiers {
481 /* if the decl $2 is not a specifier */
482 /* find the spec and replace it */
485 while (lnk && !IS_SPEC(lnk->next))
487 lnk->next = mergeSpec($1,lnk->next, "storage_class_specifier declaration_specifiers - skipped");
491 $$ = mergeSpec($1,$2, "storage_class_specifier declaration_specifiers");
493 | type_specifier { $$ = $1; }
494 | type_specifier declaration_specifiers {
495 /* if the decl $2 is not a specifier */
496 /* find the spec and replace it */
499 while (lnk && !IS_SPEC(lnk->next))
501 lnk->next = mergeSpec($1,lnk->next, "type_specifier declaration_specifiers - skipped");
505 $$ = mergeSpec($1,$2, "type_specifier declaration_specifiers");
511 | init_declarator_list ',' init_declarator { $3->next = $1 ; $$ = $3;}
515 : declarator { $1->ival = NULL ; }
516 | declarator '=' initializer { $1->ival = $3 ; }
520 storage_class_specifier
522 $$ = newLink (SPECIFIER) ;
523 SPEC_TYPEDEF($$) = 1 ;
526 $$ = newLink(SPECIFIER);
530 $$ = newLink (SPECIFIER);
534 $$ = newLink (SPECIFIER) ;
535 SPEC_SCLS($$) = S_AUTO ;
538 $$ = newLink (SPECIFIER);
539 SPEC_SCLS($$) = S_REGISTER ;
544 : INTERRUPT CONSTANT { $$ = (int) floatFromVal($2) ; }
549 | type_specifier2 AT constant_expr
551 /* add this to the storage class specifier */
552 SPEC_ABSA($1) = 1; /* set the absolute addr flag */
553 /* now get the abs addr from value */
554 SPEC_ADDR($1) = (int) floatFromVal(constExprValue($3,TRUE)) ;
560 $$=newLink(SPECIFIER);
561 SPEC_NOUN($$) = V_CHAR ;
564 $$=newLink(SPECIFIER);
565 $$->select.s._short = 1 ;
568 $$=newLink(SPECIFIER);
569 SPEC_NOUN($$) = V_INT ;
572 $$=newLink(SPECIFIER);
576 $$=newLink(SPECIFIER);
577 $$->select.s._signed = 1;
580 $$=newLink(SPECIFIER);
584 $$=newLink(SPECIFIER);
585 SPEC_NOUN($$) = V_VOID ;
588 $$=newLink(SPECIFIER);
592 $$=newLink(SPECIFIER);
593 SPEC_VOLATILE($$) = 1 ;
596 $$=newLink(SPECIFIER);
597 SPEC_NOUN($$) = V_FLOAT;
600 $$ = newLink (SPECIFIER);
601 SPEC_SCLS($$) = S_XDATA ;
604 $$ = newLink (SPECIFIER) ;
605 SPEC_SCLS($$) = S_CODE ;
608 $$ = newLink (SPECIFIER) ;
609 SPEC_SCLS($$) = S_EEPROM ;
612 $$ = newLink (SPECIFIER);
613 SPEC_SCLS($$) = S_DATA ;
616 $$ = newLink (SPECIFIER);
617 SPEC_SCLS($$) = S_IDATA ;
620 $$ = newLink (SPECIFIER);
621 SPEC_SCLS($$) = S_PDATA ;
624 $$=newLink(SPECIFIER);
625 SPEC_NOUN($$) = V_BIT ;
626 SPEC_SCLS($$) = S_BIT ;
631 | struct_or_union_specifier
640 sym = findSym(TypedefTab,NULL,$1) ;
641 $$ = p = copyLinkChain(sym->type);
642 SPEC_TYPEDEF(getSpec(p)) = 0;
649 $$ = newLink(SPECIFIER) ;
650 SPEC_NOUN($$) = V_SBIT;
651 SPEC_SCLS($$) = S_SBIT;
654 $$ = newLink(SPECIFIER) ;
655 SPEC_NOUN($$) = V_CHAR;
656 SPEC_SCLS($$) = S_SFR ;
661 struct_or_union_specifier
662 : struct_or_union opt_stag '{' struct_declaration_list '}'
666 /* Create a structdef */
668 sdef->fields = reverseSyms($4) ; /* link the fields */
669 sdef->size = compStructSize($1,sdef); /* update size of */
671 /* Create the specifier */
672 $$ = newLink (SPECIFIER) ;
673 SPEC_NOUN($$) = V_STRUCT;
674 SPEC_STRUCT($$)= sdef ;
676 | struct_or_union stag
678 $$ = newLink(SPECIFIER) ;
679 SPEC_NOUN($$) = V_STRUCT;
680 SPEC_STRUCT($$) = $2 ;
685 : STRUCT { $$ = STRUCT ; }
686 | UNION { $$ = UNION ; }
691 | { /* synthesize a name add to structtable */
692 $$ = newStruct(genSymName(NestLevel)) ;
693 $$->level = NestLevel ;
694 addSym (StructTab, $$, $$->tag,$$->level,currBlockno, 0);
698 : identifier { /* add name to structure table */
699 $$ = findSymWithBlock (StructTab,$1,currBlockno);
701 $$ = newStruct($1->name) ;
702 $$->level = NestLevel ;
703 addSym (StructTab, $$, $$->tag,$$->level,currBlockno,0);
708 struct_declaration_list
710 | struct_declaration_list struct_declaration
713 /* go to the end of the chain */
714 while (sym->next) sym = sym->next;
722 : type_specifier_list struct_declarator_list ';'
724 /* add this type to all the symbols */
726 for ( sym = $2 ; sym != NULL ; sym = sym->next ) {
728 /* make the symbol one level up */
731 pointerTypes(sym->type,copyLinkChain($1));
733 sym->type = copyLinkChain($1);
734 sym->etype = getSpec(sym->type);
737 addDecl (sym,0,copyLinkChain($1));
738 /* make sure the type is complete and sane */
739 checkTypeSanity(sym->etype, sym->name);
745 struct_declarator_list
747 | struct_declarator_list ',' struct_declarator
756 | ':' constant_expr {
757 $$ = newSymbol (genSymName(NestLevel),NestLevel) ;
758 $$->bitVar = (int) floatFromVal(constExprValue($2,TRUE));
760 | declarator ':' constant_expr
762 $1->bitVar = (int) floatFromVal(constExprValue($3,TRUE));
767 : ENUM '{' enumerator_list '}' {
769 //allocVariables(reverseSyms($3)) ;
770 $$ = copyLinkChain(cenum->type);
772 | ENUM identifier '{' enumerator_list '}' {
775 $2->type = copyLinkChain(cenum->type);
776 $2->etype = getSpec($2->type);
777 /* add this to the enumerator table */
778 if (!(csym=findSym(enumTab,$2,$2->name)) &&
779 (csym && csym->level == $2->level))
780 werror(E_DUPLICATE_TYPEDEF,csym->name);
782 addSym ( enumTab,$2,$2->name,$2->level,$2->block, 0);
784 //allocVariables (reverseSyms($4));
785 $$ = copyLinkChain(cenum->type);
786 SPEC_SCLS(getSpec($$)) = 0 ;
791 /* check the enumerator table */
792 if ((csym = findSym(enumTab,$2,$2->name)))
793 $$ = copyLinkChain(csym->type);
795 $$ = newLink(SPECIFIER) ;
796 SPEC_NOUN($$) = V_INT ;
799 SPEC_SCLS(getSpec($$)) = 0 ;
805 | enumerator_list ',' {
807 | enumerator_list ',' enumerator {
814 : identifier opt_assign_expr
816 /* make the symbol one level up */
818 $1->type = copyLinkChain($2->type);
819 $1->etype= getSpec($1->type);
820 SPEC_ENUM($1->etype) = 1;
822 // do this now, so we can use it for the next enums in the list
828 : '=' constant_expr {
831 val = constExprValue($2,TRUE);
836 SNPRINTF(lbuff, sizeof(lbuff),
837 "%d",(int) floatFromVal(cenum)+1);
838 $$ = cenum = constVal(lbuff);
841 SNPRINTF(lbuff, sizeof(lbuff),
843 $$ = cenum = constVal(lbuff);
849 : declarator2_function_attributes { $$ = $1; }
850 | pointer declarator2_function_attributes
852 addDecl ($2,0,reverseLink($1));
857 declarator2_function_attributes
858 : declarator2 { $$ = $1 ; }
859 | declarator2 function_attribute {
860 // copy the functionAttributes (not the args and hasVargs !!)
861 sym_link *funcType=$1->etype;
862 struct value *args=FUNC_ARGS(funcType);
863 unsigned hasVargs=FUNC_HASVARARGS(funcType);
865 memcpy (&funcType->funcAttrs, &$2->funcAttrs,
866 sizeof($2->funcAttrs));
868 FUNC_ARGS(funcType)=args;
869 FUNC_HASVARARGS(funcType)=hasVargs;
872 memset (&$2->funcAttrs, 0,
873 sizeof($2->funcAttrs));
881 | '(' declarator ')' { $$ = $2; }
882 | declarator2 '[' ']'
886 p = newLink (DECLARATOR);
887 DCL_TYPE(p) = ARRAY ;
891 | declarator2 '[' constant_expr ']'
896 p = (tval = constExprValue($3,TRUE))->etype;
897 /* if it is not a constant then Error */
898 if ( SPEC_SCLS(p) != S_LITERAL)
899 werror(E_CONST_EXPECTED) ;
901 p = newLink (DECLARATOR);
902 DCL_TYPE(p) = ARRAY ;
903 DCL_ELEM(p) = (int) floatFromVal(tval) ;
907 | declarator2 '(' ')' { addDecl ($1,FUNCTION,NULL) ; }
908 | declarator2 '(' { NestLevel++ ; currBlockno++; } parameter_type_list ')'
911 addDecl ($1,FUNCTION,NULL) ;
913 FUNC_HASVARARGS($1->type) = IS_VARG($4);
914 FUNC_ARGS($1->type) = reverseVal($4);
916 /* nest level was incremented to take care of the parms */
920 // if this was a pointer (to a function)
921 if (IS_PTR($1->type)) {
922 // move the args and hasVargs to the function
923 FUNC_ARGS($1->etype)=FUNC_ARGS($1->type);
924 FUNC_HASVARARGS($1->etype)=FUNC_HASVARARGS($1->type);
925 memset (&$1->type->funcAttrs, 0,
926 sizeof($1->type->funcAttrs));
927 // remove the symbol args (if any)
928 cleanUpLevel(SymbolTab,NestLevel+1);
933 | declarator2 '(' parameter_identifier_list ')'
935 werror(E_OLD_STYLE,$1->name) ;
937 /* assume it returns an int */
938 $1->type = $1->etype = newIntLink();
944 : unqualified_pointer { $$ = $1 ;}
945 | unqualified_pointer type_specifier_list
950 | unqualified_pointer pointer
954 DCL_TYPE($2)=port->unqualified_pointer;
956 | unqualified_pointer type_specifier_list pointer
959 if (IS_SPEC($2) && DCL_TYPE($3) == UPOINTER) {
960 DCL_PTR_CONST($1) = SPEC_CONST($2);
961 DCL_PTR_VOLATILE($1) = SPEC_VOLATILE($2);
962 switch (SPEC_SCLS($2)) {
964 DCL_TYPE($3) = FPOINTER;
967 DCL_TYPE($3) = IPOINTER ;
970 DCL_TYPE($3) = PPOINTER ;
973 DCL_TYPE($3) = POINTER ;
976 DCL_PTR_CONST($3) = 1;
977 DCL_TYPE($3) = CPOINTER ;
980 DCL_TYPE($3) = EEPPOINTER;
983 // this could be just "constant"
984 // werror(W_PTR_TYPE_INVALID);
989 werror (W_PTR_TYPE_INVALID);
997 $$ = newLink(DECLARATOR);
998 DCL_TYPE($$)=UPOINTER;
1004 //| type_specifier_list type_specifier { $$ = mergeSpec ($1,$2, "type_specifier_list"); }
1005 | type_specifier_list type_specifier {
1006 /* if the decl $2 is not a specifier */
1007 /* find the spec and replace it */
1008 if ( !IS_SPEC($2)) {
1009 sym_link *lnk = $2 ;
1010 while (lnk && !IS_SPEC(lnk->next))
1012 lnk->next = mergeSpec($1,lnk->next, "type_specifier_list type_specifier skipped");
1016 $$ = mergeSpec($1,$2, "type_specifier_list type_specifier");
1020 parameter_identifier_list
1022 | identifier_list ',' ELIPSIS
1027 | identifier_list ',' identifier
1036 | parameter_list ',' VAR_ARGS { $1->vArgs = 1;}
1040 : parameter_declaration
1041 | parameter_list ',' parameter_declaration
1048 parameter_declaration
1049 : type_specifier_list declarator
1052 pointerTypes($2->type,$1);
1054 for (loop=$2;loop;loop->_isparm=1,loop=loop->next);
1061 $$->etype = getSpec($$->type);
1066 : type_specifier_list { $$ = $1 ;}
1067 | type_specifier_list abstract_declarator
1069 /* go to the end of the list */
1071 pointerTypes($2,$1);
1072 for ( p = $2 ; p && p->next ; p=p->next);
1074 werror(E_SYNTAX_ERROR, yytext);
1083 : pointer { $$ = reverseLink($1); }
1084 | abstract_declarator2
1085 | pointer abstract_declarator2 { $1 = reverseLink($1); $1->next = $2 ; $$ = $1;}
1088 abstract_declarator2
1089 : '(' abstract_declarator ')' { $$ = $2 ; }
1091 $$ = newLink (DECLARATOR);
1092 DCL_TYPE($$) = ARRAY ;
1095 | '[' constant_expr ']' {
1097 $$ = newLink (DECLARATOR);
1098 DCL_TYPE($$) = ARRAY ;
1099 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($2,TRUE));
1101 | abstract_declarator2 '[' ']' {
1102 $$ = newLink (DECLARATOR);
1103 DCL_TYPE($$) = ARRAY ;
1107 | abstract_declarator2 '[' constant_expr ']'
1110 $$ = newLink (DECLARATOR);
1111 DCL_TYPE($$) = ARRAY ;
1112 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($3,TRUE));
1115 | '(' ')' { $$ = NULL;}
1116 | '(' parameter_type_list ')' { $$ = NULL;}
1117 | abstract_declarator2 '(' ')' {
1118 // $1 must be a pointer to a function
1119 sym_link *p=newLink(DECLARATOR);
1120 DCL_TYPE(p) = FUNCTION;
1122 // ((void (code *) ()) 0) ()
1123 $1=newLink(DECLARATOR);
1124 DCL_TYPE($1)=CPOINTER;
1129 | abstract_declarator2 '(' parameter_type_list ')' {
1130 if (!IS_VOID($3->etype)) {
1131 // this is nonsense, so let's just burp something
1132 werror(E_TOO_FEW_PARMS);
1134 // $1 must be a pointer to a function
1135 sym_link *p=newLink(DECLARATOR);
1136 DCL_TYPE(p) = FUNCTION;
1138 // ((void (code *) (void)) 0) ()
1139 $1=newLink(DECLARATOR);
1140 DCL_TYPE($1)=CPOINTER;
1149 : assignment_expr { $$ = newiList(INIT_NODE,$1); }
1150 | '{' initializer_list '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1151 | '{' initializer_list ',' '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1156 | initializer_list ',' initializer { $3->next = $1; $$ = $3; }
1161 | compound_statement
1162 | expression_statement
1163 | selection_statement
1164 | iteration_statement
1167 ast *ex = newNode(INLINEASM,NULL,NULL);
1168 ex->values.inlineasm = strdup($1);
1174 // : identifier ':' statement { $$ = createLabel($1,$3); }
1175 : identifier ':' { $$ = createLabel($1,NULL); }
1176 | CASE constant_expr ':' statement { $$ = createCase(STACK_PEEK(swStk),$2,$4); }
1177 | DEFAULT ':' statement { $$ = createDefault(STACK_PEEK(swStk),$3); }
1180 start_block : '{' { STACK_PUSH(blockNum,currBlockno); currBlockno = ++blockNo ; }
1183 end_block : '}' { currBlockno = STACK_POP(blockNum); }
1187 : start_block end_block { $$ = createBlock(NULL,NULL); }
1188 | start_block statement_list end_block { $$ = createBlock(NULL,$2) ; }
1190 declaration_list { addSymChain($2); }
1191 end_block { $$ = createBlock($2,NULL) ; }
1193 declaration_list { addSymChain ($2); }
1195 end_block {$$ = createBlock($2,$4) ; }
1196 | error ';' { $$ = NULL ; }
1202 /* if this is typedef declare it immediately */
1203 if ( $1 && IS_TYPEDEF($1->etype)) {
1204 allocVariables ($1);
1211 | declaration_list declaration
1215 /* if this is a typedef */
1216 if ($2 && IS_TYPEDEF($2->etype)) {
1217 allocVariables ($2);
1221 /* get to the end of the previous decl */
1236 | statement_list statement { $$ = newNode(NULLOP,$1,$2) ;}
1239 expression_statement
1245 : ELSE statement { $$ = $2 ; }
1251 : IF '(' expr ')' statement else_statement { noLineno++ ; $$ = createIf ($3, $5, $6 ); noLineno--;}
1252 | SWITCH '(' expr ')' {
1254 static int swLabel = 0 ;
1256 /* create a node for expression */
1257 ex = newNode(SWITCH,$3,NULL);
1258 STACK_PUSH(swStk,ex); /* save it in the stack */
1259 ex->values.switchVals.swNum = swLabel ;
1261 /* now create the label */
1262 SNPRINTF(lbuff, sizeof(lbuff),
1263 "_swBrk_%d",swLabel++);
1264 $<sym>$ = newSymbol(lbuff,NestLevel);
1265 /* put label in the break stack */
1266 STACK_PUSH(breakStack,$<sym>$);
1269 /* get back the switch form the stack */
1270 $$ = STACK_POP(swStk) ;
1271 $$->right = newNode (NULLOP,$6,createLabel($<sym>5,NULL));
1272 STACK_POP(breakStack);
1276 while : WHILE { /* create and push the continue , break & body labels */
1277 static int Lblnum = 0 ;
1279 SNPRINTF (lbuff, sizeof(lbuff), "_whilecontinue_%d",Lblnum);
1280 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1282 SNPRINTF (lbuff, sizeof(lbuff), "_whilebreak_%d",Lblnum);
1283 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1285 SNPRINTF (lbuff, sizeof(lbuff), "_whilebody_%d",Lblnum++);
1286 $$ = newSymbol(lbuff,NestLevel);
1290 do : DO { /* create and push the continue , break & body Labels */
1291 static int Lblnum = 0 ;
1294 SNPRINTF(lbuff, sizeof(lbuff), "_docontinue_%d",Lblnum);
1295 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1297 SNPRINTF(lbuff, sizeof(lbuff), "_dobreak_%d",Lblnum);
1298 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1300 SNPRINTF(lbuff, sizeof(lbuff), "_dobody_%d",Lblnum++);
1301 $$ = newSymbol (lbuff,NestLevel);
1305 for : FOR { /* create & push continue, break & body labels */
1306 static int Lblnum = 0 ;
1309 SNPRINTF(lbuff, sizeof(lbuff), "_forcontinue_%d",Lblnum);
1310 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1312 SNPRINTF(lbuff, sizeof(lbuff), "_forbreak_%d",Lblnum);
1313 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1315 SNPRINTF(lbuff, sizeof(lbuff), "_forbody_%d",Lblnum);
1316 $$ = newSymbol(lbuff,NestLevel);
1318 SNPRINTF(lbuff, sizeof(lbuff), "_forcond_%d",Lblnum++);
1319 STACK_PUSH(forStack,newSymbol(lbuff,NestLevel));
1324 : while '(' expr ')' statement
1327 $$ = createWhile ( $1, STACK_POP(continueStack),
1328 STACK_POP(breakStack), $3, $5 );
1329 $$->lineno = $1->lineDef ;
1332 | do statement WHILE '(' expr ')' ';'
1335 $$ = createDo ( $1 , STACK_POP(continueStack),
1336 STACK_POP(breakStack), $5, $2);
1337 $$->lineno = $1->lineDef ;
1340 | for '(' expr_opt ';' expr_opt ';' expr_opt ')' statement
1344 /* if break or continue statement present
1345 then create a general case loop */
1346 if (STACK_PEEK(continueStack)->isref ||
1347 STACK_PEEK(breakStack)->isref) {
1348 $$ = createFor ($1, STACK_POP(continueStack),
1349 STACK_POP(breakStack) ,
1350 STACK_POP(forStack) ,
1353 $$ = newNode(FOR,$9,NULL);
1354 AST_FOR($$,trueLabel) = $1;
1355 AST_FOR($$,continueLabel) = STACK_POP(continueStack);
1356 AST_FOR($$,falseLabel) = STACK_POP(breakStack);
1357 AST_FOR($$,condLabel) = STACK_POP(forStack) ;
1358 AST_FOR($$,initExpr) = $3;
1359 AST_FOR($$,condExpr) = $5;
1360 AST_FOR($$,loopExpr) = $7;
1373 : GOTO identifier ';' {
1375 $$ = newAst_VALUE(symbolVal($2));
1376 $$ = newNode(GOTO,$$,NULL);
1379 /* make sure continue is in context */
1380 if (STACK_PEEK(continueStack) == NULL) {
1381 werror(E_BREAK_CONTEXT);
1385 $$ = newAst_VALUE(symbolVal(STACK_PEEK(continueStack)));
1386 $$ = newNode(GOTO,$$,NULL);
1387 /* mark the continue label as referenced */
1388 STACK_PEEK(continueStack)->isref = 1;
1392 if (STACK_PEEK(breakStack) == NULL) {
1393 werror(E_BREAK_CONTEXT);
1396 $$ = newAst_VALUE(symbolVal(STACK_PEEK(breakStack)));
1397 $$ = newNode(GOTO,$$,NULL);
1398 STACK_PEEK(breakStack)->isref = 1;
1401 | RETURN ';' { $$ = newNode(RETURN,NULL,NULL) ; }
1402 | RETURN expr ';' { $$ = newNode(RETURN,NULL,$2) ; }
1406 : IDENTIFIER { $$ = newSymbol ($1,NestLevel) ; }