2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include "type_hash.h"
28 #include "adt/error.h"
29 #include "lang_features.h"
31 static struct obstack _type_obst;
33 struct obstack *type_obst = &_type_obst;
34 static int type_visited = 0;
35 static bool print_implicit_array_size = false;
37 static void intern_print_type_pre(const type_t *type, bool top);
38 static void intern_print_type_post(const type_t *type, bool top);
40 typedef struct atomic_type_properties_t atomic_type_properties_t;
41 struct atomic_type_properties_t {
42 unsigned size; /**< type size in bytes */
43 unsigned alignment; /**< type alignment in bytes */
44 unsigned flags; /**< type flags from atomic_type_flag_t */
47 static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
48 //ATOMIC_TYPE_INVALID = 0,
49 [ATOMIC_TYPE_VOID] = {
52 .flags = ATOMIC_TYPE_FLAG_NONE
54 [ATOMIC_TYPE_CHAR] = {
57 /* signed flag will be set when known */
58 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
60 [ATOMIC_TYPE_SCHAR] = {
63 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
64 | ATOMIC_TYPE_FLAG_SIGNED,
66 [ATOMIC_TYPE_UCHAR] = {
69 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
71 [ATOMIC_TYPE_SHORT] = {
74 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
75 | ATOMIC_TYPE_FLAG_SIGNED
77 [ATOMIC_TYPE_USHORT] = {
80 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
83 .size = (unsigned) -1,
84 .alignment = (unsigned) -1,
85 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
86 | ATOMIC_TYPE_FLAG_SIGNED,
88 [ATOMIC_TYPE_UINT] = {
89 .size = (unsigned) -1,
90 .alignment = (unsigned) -1,
91 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
93 [ATOMIC_TYPE_LONG] = {
94 .size = (unsigned) -1,
95 .alignment = (unsigned) -1,
96 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
97 | ATOMIC_TYPE_FLAG_SIGNED,
99 [ATOMIC_TYPE_ULONG] = {
100 .size = (unsigned) -1,
101 .alignment = (unsigned) -1,
102 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
104 [ATOMIC_TYPE_LONGLONG] = {
105 .size = (unsigned) -1,
106 .alignment = (unsigned) -1,
107 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
108 | ATOMIC_TYPE_FLAG_SIGNED,
110 [ATOMIC_TYPE_ULONGLONG] = {
111 .size = (unsigned) -1,
112 .alignment = (unsigned) -1,
113 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
115 [ATOMIC_TYPE_BOOL] = {
116 .size = (unsigned) -1,
117 .alignment = (unsigned) -1,
118 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
120 [ATOMIC_TYPE_FLOAT] = {
122 .alignment = (unsigned) -1,
123 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
124 | ATOMIC_TYPE_FLAG_SIGNED,
126 [ATOMIC_TYPE_DOUBLE] = {
128 .alignment = (unsigned) -1,
129 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
130 | ATOMIC_TYPE_FLAG_SIGNED,
132 [ATOMIC_TYPE_LONG_DOUBLE] = {
134 .alignment = (unsigned) -1,
135 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
136 | ATOMIC_TYPE_FLAG_SIGNED,
138 /* complex and imaginary types are set in init_types */
141 void init_types(void)
143 obstack_init(type_obst);
145 atomic_type_properties_t *props = atomic_type_properties;
147 if (char_is_signed) {
148 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
151 unsigned int_size = machine_size < 32 ? 2 : 4;
152 unsigned long_size = machine_size < 64 ? 4 : 8;
153 unsigned llong_size = machine_size < 32 ? 4 : 8;
155 props[ATOMIC_TYPE_INT].size = int_size;
156 props[ATOMIC_TYPE_INT].alignment = int_size;
157 props[ATOMIC_TYPE_UINT].size = int_size;
158 props[ATOMIC_TYPE_UINT].alignment = int_size;
159 props[ATOMIC_TYPE_LONG].size = long_size;
160 props[ATOMIC_TYPE_LONG].alignment = long_size;
161 props[ATOMIC_TYPE_ULONG].size = long_size;
162 props[ATOMIC_TYPE_ULONG].alignment = long_size;
163 props[ATOMIC_TYPE_LONGLONG].size = llong_size;
164 props[ATOMIC_TYPE_LONGLONG].alignment = llong_size;
165 props[ATOMIC_TYPE_ULONGLONG].size = llong_size;
166 props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size;
168 /* TODO: backend specific, need a way to query the backend for this.
169 * The following are good settings for x86 */
170 props[ATOMIC_TYPE_FLOAT].alignment = 4;
171 props[ATOMIC_TYPE_DOUBLE].alignment = 4;
172 props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
173 props[ATOMIC_TYPE_LONGLONG].alignment = 4;
174 props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
176 props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UINT];
179 void exit_types(void)
181 obstack_free(type_obst, NULL);
184 void type_set_output(FILE *stream)
189 void inc_type_visited(void)
194 void print_type_qualifiers(type_qualifiers_t qualifiers)
196 if (qualifiers & TYPE_QUALIFIER_CONST) fputs("const ", out);
197 if (qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out);
198 if (qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out);
202 * Prints the name of an atomic type kinds.
204 * @param kind The type kind.
207 void print_atomic_kinds(atomic_type_kind_t kind)
209 const char *s = "INVALIDATOMIC";
211 case ATOMIC_TYPE_INVALID: break;
212 case ATOMIC_TYPE_VOID: s = "void"; break;
213 case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
214 case ATOMIC_TYPE_CHAR: s = "char"; break;
215 case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
216 case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
217 case ATOMIC_TYPE_INT: s = "int"; break;
218 case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
219 case ATOMIC_TYPE_SHORT: s = "short"; break;
220 case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
221 case ATOMIC_TYPE_LONG: s = "long"; break;
222 case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
223 case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
224 case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
225 case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break;
226 case ATOMIC_TYPE_FLOAT: s = "float"; break;
227 case ATOMIC_TYPE_DOUBLE: s = "double"; break;
233 * Prints the name of an atomic type.
235 * @param type The type.
238 void print_atomic_type(const atomic_type_t *type)
240 print_type_qualifiers(type->base.qualifiers);
241 print_atomic_kinds(type->akind);
245 * Prints the name of a complex type.
247 * @param type The type.
250 void print_complex_type(const complex_type_t *type)
252 print_type_qualifiers(type->base.qualifiers);
253 fputs("_Complex ", out);
254 print_atomic_kinds(type->akind);
258 * Prints the name of an imaginary type.
260 * @param type The type.
263 void print_imaginary_type(const imaginary_type_t *type)
265 print_type_qualifiers(type->base.qualifiers);
266 fputs("_Imaginary ", out);
267 print_atomic_kinds(type->akind);
271 * Print the first part (the prefix) of a type.
273 * @param type The type to print.
274 * @param top true, if this is the top type, false if it's an embedded type.
276 static void print_function_type_pre(const function_type_t *type, bool top)
278 print_type_qualifiers(type->base.qualifiers);
280 intern_print_type_pre(type->return_type, false);
282 switch (type->calling_convention) {
284 fputs(" __cdecl ", out);
287 fputs(" __stdcall ", out);
290 fputs(" __fastcall ", out);
293 fputs(" __thiscall ", out);
299 /* don't emit braces if we're the toplevel type... */
305 * Print the second part (the postfix) of a type.
307 * @param type The type to print.
308 * @param top true, if this is the top type, false if it's an embedded type.
310 static void print_function_type_post(const function_type_t *type,
311 const scope_t *scope, bool top)
313 intern_print_type_post(type->return_type, false);
318 function_parameter_t *parameter = type->parameters;
319 for( ; parameter != NULL; parameter = parameter->next) {
325 print_type(parameter->type);
328 declaration_t *parameter = scope->declarations;
329 for( ; parameter != NULL; parameter = parameter->next) {
335 print_type_ext(parameter->type, parameter->symbol,
339 if (type->variadic) {
347 if (first && !type->unspecified_parameters) {
352 /* don't emit braces if we're the toplevel type... */
358 * Prints the prefix part of a pointer type.
360 * @param type The pointer type.
362 static void print_pointer_type_pre(const pointer_type_t *type)
364 intern_print_type_pre(type->points_to, false);
366 print_type_qualifiers(type->base.qualifiers);
370 * Prints the postfix part of a pointer type.
372 * @param type The pointer type.
374 static void print_pointer_type_post(const pointer_type_t *type)
376 intern_print_type_post(type->points_to, false);
380 * Prints the prefix part of an array type.
382 * @param type The array type.
384 static void print_array_type_pre(const array_type_t *type)
386 intern_print_type_pre(type->element_type, false);
390 * Prints the postfix part of an array type.
392 * @param type The array type.
394 static void print_array_type_post(const array_type_t *type)
397 if (type->is_static) {
398 fputs("static ", out);
400 print_type_qualifiers(type->base.qualifiers);
401 if (type->size_expression != NULL
402 && (print_implicit_array_size || !type->has_implicit_size)) {
403 print_expression(type->size_expression);
406 intern_print_type_post(type->element_type, false);
410 * Prints the postfix part of a bitfield type.
412 * @param type The array type.
414 static void print_bitfield_type_post(const bitfield_type_t *type)
417 print_expression(type->size);
418 intern_print_type_post(type->base_type, false);
422 * Prints an enum definition.
424 * @param declaration The enum's type declaration.
426 void print_enum_definition(const declaration_t *declaration)
432 declaration_t *entry = declaration->next;
433 for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
434 entry = entry->next) {
437 fprintf(out, "%s", entry->symbol->string);
438 if (entry->init.initializer != NULL) {
441 /* skip the implicit cast */
442 expression_t *expression = entry->init.enum_value;
443 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
444 expression = expression->unary.value;
446 print_expression(expression);
457 * Prints an enum type.
459 * @param type The enum type.
461 static void print_type_enum(const enum_type_t *type)
463 print_type_qualifiers(type->base.qualifiers);
466 declaration_t *declaration = type->declaration;
467 symbol_t *symbol = declaration->symbol;
468 if (symbol != NULL) {
469 fputs(symbol->string, out);
471 print_enum_definition(declaration);
476 * Print the compound part of a compound type.
478 * @param declaration The declaration of the compound type.
480 void print_compound_definition(const declaration_t *declaration)
485 declaration_t *iter = declaration->scope.declarations;
486 for( ; iter != NULL; iter = iter->next) {
488 print_declaration(iter);
498 * Prints a compound type.
500 * @param type The compound type.
502 static void print_compound_type(const compound_type_t *type)
504 print_type_qualifiers(type->base.qualifiers);
506 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
507 fputs("struct ", out);
509 assert(type->base.kind == TYPE_COMPOUND_UNION);
510 fputs("union ", out);
513 declaration_t *declaration = type->declaration;
514 symbol_t *symbol = declaration->symbol;
515 if (symbol != NULL) {
516 fputs(symbol->string, out);
518 print_compound_definition(declaration);
523 * Prints the prefix part of a typedef type.
525 * @param type The typedef type.
527 static void print_typedef_type_pre(const typedef_type_t *const type)
529 print_type_qualifiers(type->base.qualifiers);
530 fputs(type->declaration->symbol->string, out);
534 * Prints the prefix part of a typeof type.
536 * @param type The typeof type.
538 static void print_typeof_type_pre(const typeof_type_t *const type)
540 fputs("typeof(", out);
541 if (type->expression != NULL) {
542 assert(type->typeof_type == NULL);
543 print_expression(type->expression);
545 print_type(type->typeof_type);
551 * Prints the prefix part of a type.
553 * @param type The type.
554 * @param top true if we print the toplevel type, false else.
556 static void intern_print_type_pre(const type_t *const type, const bool top)
560 fputs("<error>", out);
563 fputs("<invalid>", out);
566 print_type_enum(&type->enumt);
569 print_atomic_type(&type->atomic);
572 print_complex_type(&type->complex);
575 print_imaginary_type(&type->imaginary);
577 case TYPE_COMPOUND_STRUCT:
578 case TYPE_COMPOUND_UNION:
579 print_compound_type(&type->compound);
582 fputs(type->builtin.symbol->string, out);
585 print_function_type_pre(&type->function, top);
588 print_pointer_type_pre(&type->pointer);
591 intern_print_type_pre(type->bitfield.base_type, top);
594 print_array_type_pre(&type->array);
597 print_typedef_type_pre(&type->typedeft);
600 print_typeof_type_pre(&type->typeoft);
603 fputs("unknown", out);
607 * Prints the postfix part of a type.
609 * @param type The type.
610 * @param top true if we print the toplevel type, false else.
612 static void intern_print_type_post(const type_t *const type, const bool top)
616 print_function_type_post(&type->function, NULL, top);
619 print_pointer_type_post(&type->pointer);
622 print_array_type_post(&type->array);
625 print_bitfield_type_post(&type->bitfield);
633 case TYPE_COMPOUND_STRUCT:
634 case TYPE_COMPOUND_UNION:
645 * @param type The type.
647 void print_type(const type_t *const type)
649 print_type_ext(type, NULL, NULL);
652 void print_type_ext(const type_t *const type, const symbol_t *symbol,
653 const scope_t *scope)
656 fputs("nil type", out);
660 intern_print_type_pre(type, true);
661 if (symbol != NULL) {
663 fputs(symbol->string, out);
665 if (type->kind == TYPE_FUNCTION) {
666 print_function_type_post(&type->function, scope, true);
668 intern_print_type_post(type, true);
673 * Return the size of a type AST node.
675 * @param type The type.
677 static size_t get_type_size(const type_t *type)
680 case TYPE_ATOMIC: return sizeof(atomic_type_t);
681 case TYPE_COMPLEX: return sizeof(complex_type_t);
682 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
683 case TYPE_COMPOUND_STRUCT:
684 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
685 case TYPE_ENUM: return sizeof(enum_type_t);
686 case TYPE_FUNCTION: return sizeof(function_type_t);
687 case TYPE_POINTER: return sizeof(pointer_type_t);
688 case TYPE_ARRAY: return sizeof(array_type_t);
689 case TYPE_BUILTIN: return sizeof(builtin_type_t);
690 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
691 case TYPE_TYPEOF: return sizeof(typeof_type_t);
692 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
693 case TYPE_ERROR: panic("error type found");
694 case TYPE_INVALID: panic("invalid type found");
696 panic("unknown type found");
702 * @param type The type to copy.
703 * @return A copy of the type.
705 * @note This does not produce a deep copy!
707 type_t *duplicate_type(const type_t *type)
709 size_t size = get_type_size(type);
711 type_t *copy = obstack_alloc(type_obst, size);
712 memcpy(copy, type, size);
718 * Returns the unqualified type of a given type.
720 * @param type The type.
721 * @returns The unqualified type.
723 type_t *get_unqualified_type(type_t *type)
725 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
728 type_t *unqualified_type = duplicate_type(type);
729 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
731 type_t *result = typehash_insert(unqualified_type);
732 if (result != unqualified_type) {
733 obstack_free(type_obst, unqualified_type);
740 * Check if a type is valid.
742 * @param type The type to check.
743 * @return true if type represents a valid type.
745 bool type_valid(const type_t *type)
747 return type->kind != TYPE_INVALID;
750 static bool test_atomic_type_flag(atomic_type_kind_t kind,
751 atomic_type_flag_t flag)
753 assert(kind <= ATOMIC_TYPE_LAST);
754 return (atomic_type_properties[kind].flags & flag) != 0;
758 * Returns true if the given type is an integer type.
760 * @param type The type to check.
761 * @return True if type is an integer type.
763 bool is_type_integer(const type_t *type)
765 assert(!is_typeref(type));
767 if (type->kind == TYPE_ENUM)
769 if (type->kind == TYPE_BITFIELD)
772 if (type->kind != TYPE_ATOMIC)
775 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
779 * Returns true if the given type is an enum type.
781 * @param type The type to check.
782 * @return True if type is an enum type.
784 bool is_type_enum(const type_t *type)
786 assert(!is_typeref(type));
787 return type->kind == TYPE_ENUM;
791 * Returns true if the given type is an floating point type.
793 * @param type The type to check.
794 * @return True if type is a floating point type.
796 bool is_type_float(const type_t *type)
798 assert(!is_typeref(type));
800 if (type->kind != TYPE_ATOMIC)
803 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
807 * Returns true if the given type is a signed type.
809 * @param type The type to check.
810 * @return True if type is a signed type.
812 bool is_type_signed(const type_t *type)
814 assert(!is_typeref(type));
816 /* enum types are int for now */
817 if (type->kind == TYPE_ENUM)
819 if (type->kind == TYPE_BITFIELD)
820 return is_type_signed(type->bitfield.base_type);
822 if (type->kind != TYPE_ATOMIC)
825 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
829 * Returns true if the given type represents an arithmetic type.
831 * @param type The type to check.
832 * @return True if type represents an arithmetic type.
834 bool is_type_arithmetic(const type_t *type)
836 assert(!is_typeref(type));
843 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
845 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
847 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
854 * Returns true if the given type is an integer or float type.
856 * @param type The type to check.
857 * @return True if type is an integer or float type.
859 bool is_type_real(const type_t *type)
862 return is_type_integer(type)
863 || (type->kind == TYPE_ATOMIC && is_type_float(type));
867 * Returns true if the given type represents a scalar type.
869 * @param type The type to check.
870 * @return True if type represents a scalar type.
872 bool is_type_scalar(const type_t *type)
874 assert(!is_typeref(type));
876 switch (type->kind) {
877 case TYPE_POINTER: return true;
878 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
882 return is_type_arithmetic(type);
886 * Check if a given type is incomplete.
888 * @param type The type to check.
889 * @return True if the given type is incomplete (ie. just forward).
891 bool is_type_incomplete(const type_t *type)
893 assert(!is_typeref(type));
896 case TYPE_COMPOUND_STRUCT:
897 case TYPE_COMPOUND_UNION: {
898 const compound_type_t *compound_type = &type->compound;
899 declaration_t *declaration = compound_type->declaration;
900 return !declaration->init.complete;
903 const enum_type_t *enum_type = &type->enumt;
904 declaration_t *declaration = enum_type->declaration;
905 return !declaration->init.complete;
909 return type->array.size_expression == NULL
910 && !type->array.size_constant;
913 return type->atomic.akind == ATOMIC_TYPE_VOID;
916 return type->complex.akind == ATOMIC_TYPE_VOID;
919 return type->imaginary.akind == ATOMIC_TYPE_VOID;
930 panic("is_type_incomplete called without typerefs skipped");
935 panic("invalid type found");
938 bool is_type_object(const type_t *type)
940 return !is_type_function(type) && !is_type_incomplete(type);
944 * Check if two function types are compatible.
946 static bool function_types_compatible(const function_type_t *func1,
947 const function_type_t *func2)
949 const type_t* const ret1 = skip_typeref(func1->return_type);
950 const type_t* const ret2 = skip_typeref(func2->return_type);
951 if (!types_compatible(ret1, ret2))
954 /* can parameters be compared? */
955 if (func1->unspecified_parameters || func2->unspecified_parameters)
958 if (func1->variadic != func2->variadic)
961 if (func1->calling_convention != func2->calling_convention)
964 /* TODO: handling of unspecified parameters not correct yet */
966 /* all argument types must be compatible */
967 function_parameter_t *parameter1 = func1->parameters;
968 function_parameter_t *parameter2 = func2->parameters;
969 for ( ; parameter1 != NULL && parameter2 != NULL;
970 parameter1 = parameter1->next, parameter2 = parameter2->next) {
971 type_t *parameter1_type = skip_typeref(parameter1->type);
972 type_t *parameter2_type = skip_typeref(parameter2->type);
974 parameter1_type = get_unqualified_type(parameter1_type);
975 parameter2_type = get_unqualified_type(parameter2_type);
977 if (!types_compatible(parameter1_type, parameter2_type))
980 /* same number of arguments? */
981 if (parameter1 != NULL || parameter2 != NULL)
988 * Check if two array types are compatible.
990 static bool array_types_compatible(const array_type_t *array1,
991 const array_type_t *array2)
993 type_t *element_type1 = skip_typeref(array1->element_type);
994 type_t *element_type2 = skip_typeref(array2->element_type);
995 if (!types_compatible(element_type1, element_type2))
998 if (!array1->size_constant || !array2->size_constant)
1001 return array1->size == array2->size;
1005 * Check if two types are compatible.
1007 bool types_compatible(const type_t *type1, const type_t *type2)
1009 assert(!is_typeref(type1));
1010 assert(!is_typeref(type2));
1012 /* shortcut: the same type is always compatible */
1016 if (type1->base.qualifiers != type2->base.qualifiers)
1018 if (type1->kind != type2->kind)
1021 switch(type1->kind) {
1023 return function_types_compatible(&type1->function, &type2->function);
1025 return type1->atomic.akind == type2->atomic.akind;
1027 return type1->complex.akind == type2->complex.akind;
1028 case TYPE_IMAGINARY:
1029 return type1->imaginary.akind == type2->imaginary.akind;
1031 return array_types_compatible(&type1->array, &type2->array);
1033 case TYPE_POINTER: {
1034 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1035 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1036 return types_compatible(to1, to2);
1039 case TYPE_COMPOUND_STRUCT:
1040 case TYPE_COMPOUND_UNION:
1043 /* TODO: not implemented */
1047 /* not sure if this makes sense or is even needed, implement it if you
1048 * really need it! */
1049 panic("type compatibility check for bitfield type");
1052 /* Hmm, the error type should be compatible to all other types */
1055 panic("invalid type found in compatible types");
1058 panic("typerefs not skipped in compatible types?!?");
1061 /* TODO: incomplete */
1066 * Skip all typerefs and return the underlying type.
1068 type_t *skip_typeref(type_t *type)
1070 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1071 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1074 switch(type->kind) {
1077 case TYPE_TYPEDEF: {
1078 qualifiers |= type->base.qualifiers;
1079 modifiers |= type->base.modifiers;
1080 const typedef_type_t *typedef_type = &type->typedeft;
1081 if (typedef_type->resolved_type != NULL) {
1082 type = typedef_type->resolved_type;
1085 type = typedef_type->declaration->type;
1089 const typeof_type_t *typeof_type = &type->typeoft;
1090 if (typeof_type->typeof_type != NULL) {
1091 type = typeof_type->typeof_type;
1093 type = typeof_type->expression->base.type;
1103 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1104 type_t *const copy = duplicate_type(type);
1106 /* for const with typedefed array type the element type has to be
1108 if (is_type_array(copy)) {
1109 type_t *element_type = copy->array.element_type;
1110 element_type = duplicate_type(element_type);
1111 element_type->base.qualifiers |= qualifiers;
1112 element_type->base.modifiers |= modifiers;
1113 copy->array.element_type = element_type;
1115 copy->base.qualifiers |= qualifiers;
1116 copy->base.modifiers |= modifiers;
1119 type = typehash_insert(copy);
1121 obstack_free(type_obst, copy);
1128 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1130 assert(kind <= ATOMIC_TYPE_LAST);
1131 return atomic_type_properties[kind].size;
1134 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1136 assert(kind <= ATOMIC_TYPE_LAST);
1137 return atomic_type_properties[kind].alignment;
1140 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1142 assert(kind <= ATOMIC_TYPE_LAST);
1143 return atomic_type_properties[kind].flags;
1146 atomic_type_kind_t get_intptr_kind(void)
1148 if (machine_size <= 32)
1149 return ATOMIC_TYPE_INT;
1150 else if (machine_size <= 64)
1151 return ATOMIC_TYPE_LONG;
1153 return ATOMIC_TYPE_LONGLONG;
1156 atomic_type_kind_t get_uintptr_kind(void)
1158 if (machine_size <= 32)
1159 return ATOMIC_TYPE_UINT;
1160 else if (machine_size <= 64)
1161 return ATOMIC_TYPE_ULONG;
1163 return ATOMIC_TYPE_ULONGLONG;
1167 * Find the atomic type kind representing a given size (signed).
1169 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1170 static atomic_type_kind_t kinds[32];
1173 atomic_type_kind_t kind = kinds[size];
1174 if (kind == ATOMIC_TYPE_INVALID) {
1175 static const atomic_type_kind_t possible_kinds[] = {
1180 ATOMIC_TYPE_LONGLONG
1182 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1183 if (get_atomic_type_size(possible_kinds[i]) == size) {
1184 kind = possible_kinds[i];
1194 * Find the atomic type kind representing a given size (signed).
1196 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1197 static atomic_type_kind_t kinds[32];
1200 atomic_type_kind_t kind = kinds[size];
1201 if (kind == ATOMIC_TYPE_INVALID) {
1202 static const atomic_type_kind_t possible_kinds[] = {
1207 ATOMIC_TYPE_ULONGLONG
1209 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1210 if (get_atomic_type_size(possible_kinds[i]) == size) {
1211 kind = possible_kinds[i];
1221 * Hash the given type and return the "singleton" version
1224 static type_t *identify_new_type(type_t *type)
1226 type_t *result = typehash_insert(type);
1227 if (result != type) {
1228 obstack_free(type_obst, type);
1234 * Creates a new atomic type.
1236 * @param akind The kind of the atomic type.
1237 * @param qualifiers Type qualifiers for the new type.
1239 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1241 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1242 memset(type, 0, sizeof(atomic_type_t));
1244 type->kind = TYPE_ATOMIC;
1245 type->base.qualifiers = qualifiers;
1246 type->base.alignment = get_atomic_type_alignment(akind);
1247 type->atomic.akind = akind;
1249 return identify_new_type(type);
1253 * Creates a new complex type.
1255 * @param akind The kind of the atomic type.
1256 * @param qualifiers Type qualifiers for the new type.
1258 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1260 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1261 memset(type, 0, sizeof(complex_type_t));
1263 type->kind = TYPE_COMPLEX;
1264 type->base.qualifiers = qualifiers;
1265 type->base.alignment = get_atomic_type_alignment(akind);
1266 type->complex.akind = akind;
1268 return identify_new_type(type);
1272 * Creates a new imaginary type.
1274 * @param akind The kind of the atomic type.
1275 * @param qualifiers Type qualifiers for the new type.
1277 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1279 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1280 memset(type, 0, sizeof(imaginary_type_t));
1282 type->kind = TYPE_IMAGINARY;
1283 type->base.qualifiers = qualifiers;
1284 type->base.alignment = get_atomic_type_alignment(akind);
1285 type->imaginary.akind = akind;
1287 return identify_new_type(type);
1291 * Creates a new pointer type.
1293 * @param points_to The points-to type for the new type.
1294 * @param qualifiers Type qualifiers for the new type.
1296 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1298 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1299 memset(type, 0, sizeof(pointer_type_t));
1301 type->kind = TYPE_POINTER;
1302 type->base.qualifiers = qualifiers;
1303 type->base.alignment = 0;
1304 type->pointer.points_to = points_to;
1306 return identify_new_type(type);
1309 type_t *make_array_type(type_t *element_type, size_t size,
1310 type_qualifiers_t qualifiers)
1312 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1313 memset(type, 0, sizeof(array_type_t));
1315 type->kind = TYPE_ARRAY;
1316 type->base.qualifiers = qualifiers;
1317 type->base.alignment = 0;
1318 type->array.element_type = element_type;
1319 type->array.size = size;
1320 type->array.size_constant = true;
1322 return identify_new_type(type);
1326 * Debug helper. Prints the given type to stdout.
1328 static __attribute__((unused))
1329 void dbg_type(const type_t *type)
1331 FILE *old_out = out;