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
28 #include "type_hash.h"
29 #include "adt/error.h"
30 #include "lang_features.h"
32 static struct obstack _type_obst;
34 struct obstack *type_obst = &_type_obst;
35 static int type_visited = 0;
36 static bool print_implicit_array_size = false;
38 static void intern_print_type_pre(const type_t *type, bool top);
39 static void intern_print_type_post(const type_t *type, bool top);
41 typedef struct atomic_type_properties_t atomic_type_properties_t;
42 struct atomic_type_properties_t {
43 unsigned size; /**< type size in bytes */
44 unsigned alignment; /**< type alignment in bytes */
45 unsigned flags; /**< type flags from atomic_type_flag_t */
48 static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
49 //ATOMIC_TYPE_INVALID = 0,
50 [ATOMIC_TYPE_VOID] = {
53 .flags = ATOMIC_TYPE_FLAG_NONE
55 [ATOMIC_TYPE_CHAR] = {
58 /* signed flag will be set when known */
59 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
61 [ATOMIC_TYPE_SCHAR] = {
64 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
65 | ATOMIC_TYPE_FLAG_SIGNED,
67 [ATOMIC_TYPE_UCHAR] = {
70 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
72 [ATOMIC_TYPE_SHORT] = {
75 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
76 | ATOMIC_TYPE_FLAG_SIGNED
78 [ATOMIC_TYPE_USHORT] = {
81 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
84 .size = (unsigned) -1,
85 .alignment = (unsigned) -1,
86 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
87 | ATOMIC_TYPE_FLAG_SIGNED,
89 [ATOMIC_TYPE_UINT] = {
90 .size = (unsigned) -1,
91 .alignment = (unsigned) -1,
92 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
94 [ATOMIC_TYPE_LONG] = {
95 .size = (unsigned) -1,
96 .alignment = (unsigned) -1,
97 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
98 | ATOMIC_TYPE_FLAG_SIGNED,
100 [ATOMIC_TYPE_ULONG] = {
101 .size = (unsigned) -1,
102 .alignment = (unsigned) -1,
103 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
105 [ATOMIC_TYPE_LONGLONG] = {
106 .size = (unsigned) -1,
107 .alignment = (unsigned) -1,
108 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
109 | ATOMIC_TYPE_FLAG_SIGNED,
111 [ATOMIC_TYPE_ULONGLONG] = {
112 .size = (unsigned) -1,
113 .alignment = (unsigned) -1,
114 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
116 [ATOMIC_TYPE_BOOL] = {
117 .size = (unsigned) -1,
118 .alignment = (unsigned) -1,
119 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
121 [ATOMIC_TYPE_FLOAT] = {
123 .alignment = (unsigned) -1,
124 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
125 | ATOMIC_TYPE_FLAG_SIGNED,
127 [ATOMIC_TYPE_DOUBLE] = {
129 .alignment = (unsigned) -1,
130 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
131 | ATOMIC_TYPE_FLAG_SIGNED,
133 [ATOMIC_TYPE_LONG_DOUBLE] = {
135 .alignment = (unsigned) -1,
136 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
137 | ATOMIC_TYPE_FLAG_SIGNED,
139 /* complex and imaginary types are set in init_types */
142 void init_types(void)
144 obstack_init(type_obst);
146 atomic_type_properties_t *props = atomic_type_properties;
148 if (char_is_signed) {
149 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
152 unsigned int_size = machine_size < 32 ? 2 : 4;
153 unsigned long_size = machine_size < 64 ? 4 : 8;
154 unsigned llong_size = machine_size < 32 ? 4 : 8;
156 props[ATOMIC_TYPE_INT].size = int_size;
157 props[ATOMIC_TYPE_INT].alignment = int_size;
158 props[ATOMIC_TYPE_UINT].size = int_size;
159 props[ATOMIC_TYPE_UINT].alignment = int_size;
160 props[ATOMIC_TYPE_LONG].size = long_size;
161 props[ATOMIC_TYPE_LONG].alignment = long_size;
162 props[ATOMIC_TYPE_ULONG].size = long_size;
163 props[ATOMIC_TYPE_ULONG].alignment = long_size;
164 props[ATOMIC_TYPE_LONGLONG].size = llong_size;
165 props[ATOMIC_TYPE_LONGLONG].alignment = llong_size;
166 props[ATOMIC_TYPE_ULONGLONG].size = llong_size;
167 props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size;
169 /* TODO: backend specific, need a way to query the backend for this.
170 * The following are good settings for x86 */
171 props[ATOMIC_TYPE_FLOAT].alignment = 4;
172 props[ATOMIC_TYPE_DOUBLE].alignment = 4;
173 props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
174 props[ATOMIC_TYPE_LONGLONG].alignment = 4;
175 props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
177 /* TODO: make this configurable for platforms which do not use byte sized
179 props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UCHAR];
182 void exit_types(void)
184 obstack_free(type_obst, NULL);
187 void type_set_output(FILE *stream)
192 void inc_type_visited(void)
197 void print_type_qualifiers(type_qualifiers_t qualifiers)
200 if (qualifiers & TYPE_QUALIFIER_CONST) {
201 fputs(" const" + first, out);
204 if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
205 fputs(" volatile" + first, out);
208 if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
209 fputs(" restrict" + first, out);
214 const char *get_atomic_kind_name(atomic_type_kind_t kind)
217 case ATOMIC_TYPE_INVALID: break;
218 case ATOMIC_TYPE_VOID: return "void";
219 case ATOMIC_TYPE_BOOL: return c_mode & _CXX ? "bool" : "_Bool";
220 case ATOMIC_TYPE_CHAR: return "char";
221 case ATOMIC_TYPE_SCHAR: return "signed char";
222 case ATOMIC_TYPE_UCHAR: return "unsigned char";
223 case ATOMIC_TYPE_INT: return "int";
224 case ATOMIC_TYPE_UINT: return "unsigned int";
225 case ATOMIC_TYPE_SHORT: return "short";
226 case ATOMIC_TYPE_USHORT: return "unsigned short";
227 case ATOMIC_TYPE_LONG: return "long";
228 case ATOMIC_TYPE_ULONG: return "unsigned long";
229 case ATOMIC_TYPE_LONGLONG: return "long long";
230 case ATOMIC_TYPE_ULONGLONG: return "unsigned long long";
231 case ATOMIC_TYPE_LONG_DOUBLE: return "long double";
232 case ATOMIC_TYPE_FLOAT: return "float";
233 case ATOMIC_TYPE_DOUBLE: return "double";
235 return "INVALIDATOMIC";
239 * Prints the name of an atomic type kinds.
241 * @param kind The type kind.
243 static void print_atomic_kinds(atomic_type_kind_t kind)
245 const char *s = get_atomic_kind_name(kind);
250 * Prints the name of an atomic type.
252 * @param type The type.
254 static void print_atomic_type(const atomic_type_t *type)
256 print_type_qualifiers(type->base.qualifiers);
257 if (type->base.qualifiers != 0)
259 print_atomic_kinds(type->akind);
263 * Prints the name of a complex type.
265 * @param type The type.
268 void print_complex_type(const complex_type_t *type)
270 int empty = type->base.qualifiers == 0;
271 print_type_qualifiers(type->base.qualifiers);
272 fputs(" _Complex " + empty, out);
273 print_atomic_kinds(type->akind);
277 * Prints the name of an imaginary type.
279 * @param type The type.
282 void print_imaginary_type(const imaginary_type_t *type)
284 int empty = type->base.qualifiers == 0;
285 print_type_qualifiers(type->base.qualifiers);
286 fputs(" _Imaginary " + empty, out);
287 print_atomic_kinds(type->akind);
291 * Print the first part (the prefix) of a type.
293 * @param type The type to print.
294 * @param top true, if this is the top type, false if it's an embedded type.
296 static void print_function_type_pre(const function_type_t *type, bool top)
298 switch (type->linkage) {
299 case LINKAGE_INVALID:
304 fputs("extern \"C\" ", out);
308 if (!(c_mode & _CXX))
309 fputs("extern \"C++\" ", out);
313 print_type_qualifiers(type->base.qualifiers);
314 if (type->base.qualifiers != 0)
317 intern_print_type_pre(type->return_type, false);
319 switch (type->calling_convention) {
320 case CC_CDECL: fputs("__cdecl ", out); break;
321 case CC_STDCALL: fputs("__stdcall ", out); break;
322 case CC_FASTCALL: fputs("__fastcall ", out); break;
323 case CC_THISCALL: fputs("__thiscall ", out); break;
324 case CC_DEFAULT: break;
327 /* don't emit parenthesis if we're the toplevel type... */
333 * Print the second part (the postfix) of a type.
335 * @param type The type to print.
336 * @param top true, if this is the top type, false if it's an embedded type.
338 static void print_function_type_post(const function_type_t *type,
339 const scope_t *parameters, bool top)
341 /* don't emit parenthesis if we're the toplevel type... */
347 if (parameters == NULL) {
348 function_parameter_t *parameter = type->parameters;
349 for( ; parameter != NULL; parameter = parameter->next) {
355 print_type(parameter->type);
358 entity_t *parameter = parameters->entities;
359 for( ; parameter != NULL; parameter = parameter->base.next) {
365 assert(is_declaration(parameter));
366 print_type_ext(parameter->declaration.type, parameter->base.symbol,
370 if (type->variadic) {
378 if (first && !type->unspecified_parameters) {
383 intern_print_type_post(type->return_type, false);
387 * Prints the prefix part of a pointer type.
389 * @param type The pointer type.
391 static void print_pointer_type_pre(const pointer_type_t *type)
393 intern_print_type_pre(type->points_to, false);
394 variable_t *const variable = type->base_variable;
395 if (variable != NULL) {
396 fputs(" __based(", out);
397 fputs(variable->base.base.symbol->string, out);
401 print_type_qualifiers(type->base.qualifiers);
402 if (type->base.qualifiers != 0)
407 * Prints the prefix part of a reference type.
409 * @param type The reference type.
411 static void print_reference_type_pre(const reference_type_t *type)
413 intern_print_type_pre(type->refers_to, false);
418 * Prints the postfix part of a pointer type.
420 * @param type The pointer type.
422 static void print_pointer_type_post(const pointer_type_t *type)
424 intern_print_type_post(type->points_to, false);
428 * Prints the postfix part of a reference type.
430 * @param type The reference type.
432 static void print_reference_type_post(const reference_type_t *type)
434 intern_print_type_post(type->refers_to, false);
438 * Prints the prefix part of an array type.
440 * @param type The array type.
442 static void print_array_type_pre(const array_type_t *type)
444 intern_print_type_pre(type->element_type, false);
448 * Prints the postfix part of an array type.
450 * @param type The array type.
452 static void print_array_type_post(const array_type_t *type)
455 if (type->is_static) {
456 fputs("static ", out);
458 print_type_qualifiers(type->base.qualifiers);
459 if (type->base.qualifiers != 0)
461 if (type->size_expression != NULL
462 && (print_implicit_array_size || !type->has_implicit_size)) {
463 print_expression(type->size_expression);
466 intern_print_type_post(type->element_type, false);
470 * Prints the postfix part of a bitfield type.
472 * @param type The array type.
474 static void print_bitfield_type_post(const bitfield_type_t *type)
477 print_expression(type->size_expression);
478 intern_print_type_post(type->base_type, false);
482 * Prints an enum definition.
484 * @param declaration The enum's type declaration.
486 void print_enum_definition(const enum_t *enume)
492 entity_t *entry = enume->base.next;
493 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
494 entry = entry->base.next) {
497 fputs(entry->base.symbol->string, out);
498 if (entry->enum_value.value != NULL) {
501 /* skip the implicit cast */
502 expression_t *expression = entry->enum_value.value;
503 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
504 expression = expression->unary.value;
506 print_expression(expression);
517 * Prints an enum type.
519 * @param type The enum type.
521 static void print_type_enum(const enum_type_t *type)
523 int empty = type->base.qualifiers == 0;
524 print_type_qualifiers(type->base.qualifiers);
525 fputs(" enum " + empty, out);
527 enum_t *enume = type->enume;
528 symbol_t *symbol = enume->base.symbol;
529 if (symbol != NULL) {
530 fputs(symbol->string, out);
532 print_enum_definition(enume);
537 * Print the compound part of a compound type.
539 void print_compound_definition(const compound_t *compound)
544 entity_t *entity = compound->members.entities;
545 for( ; entity != NULL; entity = entity->base.next) {
546 if (entity->kind != ENTITY_COMPOUND_MEMBER)
550 print_entity(entity);
557 if (compound->modifiers & DM_TRANSPARENT_UNION) {
558 fputs("__attribute__((__transparent_union__))", out);
563 * Prints a compound type.
565 * @param type The compound type.
567 static void print_compound_type(const compound_type_t *type)
569 int empty = type->base.qualifiers == 0;
570 print_type_qualifiers(type->base.qualifiers);
572 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
573 fputs(" struct " + empty, out);
575 assert(type->base.kind == TYPE_COMPOUND_UNION);
576 fputs(" union " + empty, out);
579 compound_t *compound = type->compound;
580 symbol_t *symbol = compound->base.symbol;
581 if (symbol != NULL) {
582 fputs(symbol->string, out);
584 print_compound_definition(compound);
589 * Prints the prefix part of a typedef type.
591 * @param type The typedef type.
593 static void print_typedef_type_pre(const typedef_type_t *const type)
595 print_type_qualifiers(type->base.qualifiers);
596 if (type->base.qualifiers != 0)
598 fputs(type->typedefe->base.symbol->string, out);
602 * Prints the prefix part of a typeof type.
604 * @param type The typeof type.
606 static void print_typeof_type_pre(const typeof_type_t *const type)
608 fputs("typeof(", out);
609 if (type->expression != NULL) {
610 assert(type->typeof_type == NULL);
611 print_expression(type->expression);
613 print_type(type->typeof_type);
619 * Prints the prefix part of a type.
621 * @param type The type.
622 * @param top true if we print the toplevel type, false else.
624 static void intern_print_type_pre(const type_t *const type, const bool top)
628 fputs("<error>", out);
631 fputs("<invalid>", out);
634 print_type_enum(&type->enumt);
637 print_atomic_type(&type->atomic);
640 print_complex_type(&type->complex);
643 print_imaginary_type(&type->imaginary);
645 case TYPE_COMPOUND_STRUCT:
646 case TYPE_COMPOUND_UNION:
647 print_compound_type(&type->compound);
650 fputs(type->builtin.symbol->string, out);
653 print_function_type_pre(&type->function, top);
656 print_pointer_type_pre(&type->pointer);
659 print_reference_type_pre(&type->reference);
662 intern_print_type_pre(type->bitfield.base_type, top);
665 print_array_type_pre(&type->array);
668 print_typedef_type_pre(&type->typedeft);
671 print_typeof_type_pre(&type->typeoft);
674 fputs("unknown", out);
678 * Prints the postfix part of a type.
680 * @param type The type.
681 * @param top true if we print the toplevel type, false else.
683 static void intern_print_type_post(const type_t *const type, const bool top)
687 print_function_type_post(&type->function, NULL, top);
690 print_pointer_type_post(&type->pointer);
693 print_reference_type_post(&type->reference);
696 print_array_type_post(&type->array);
699 print_bitfield_type_post(&type->bitfield);
707 case TYPE_COMPOUND_STRUCT:
708 case TYPE_COMPOUND_UNION:
715 if (type->base.modifiers & DM_TRANSPARENT_UNION) {
716 fputs("__attribute__((__transparent_union__))", out);
723 * @param type The type.
725 void print_type(const type_t *const type)
727 print_type_ext(type, NULL, NULL);
730 void print_type_ext(const type_t *const type, const symbol_t *symbol,
731 const scope_t *parameters)
734 fputs("nil type", out);
738 intern_print_type_pre(type, true);
739 if (symbol != NULL) {
741 fputs(symbol->string, out);
743 if (type->kind == TYPE_FUNCTION) {
744 print_function_type_post(&type->function, parameters, true);
746 intern_print_type_post(type, true);
751 * Return the size of a type AST node.
753 * @param type The type.
755 static size_t get_type_size(const type_t *type)
758 case TYPE_ATOMIC: return sizeof(atomic_type_t);
759 case TYPE_COMPLEX: return sizeof(complex_type_t);
760 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
761 case TYPE_COMPOUND_STRUCT:
762 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
763 case TYPE_ENUM: return sizeof(enum_type_t);
764 case TYPE_FUNCTION: return sizeof(function_type_t);
765 case TYPE_POINTER: return sizeof(pointer_type_t);
766 case TYPE_REFERENCE: return sizeof(reference_type_t);
767 case TYPE_ARRAY: return sizeof(array_type_t);
768 case TYPE_BUILTIN: return sizeof(builtin_type_t);
769 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
770 case TYPE_TYPEOF: return sizeof(typeof_type_t);
771 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
772 case TYPE_ERROR: panic("error type found");
773 case TYPE_INVALID: panic("invalid type found");
775 panic("unknown type found");
781 * @param type The type to copy.
782 * @return A copy of the type.
784 * @note This does not produce a deep copy!
786 type_t *duplicate_type(const type_t *type)
788 size_t size = get_type_size(type);
790 type_t *copy = obstack_alloc(type_obst, size);
791 memcpy(copy, type, size);
797 * Returns the unqualified type of a given type.
799 * @param type The type.
800 * @returns The unqualified type.
802 type_t *get_unqualified_type(type_t *type)
804 assert(!is_typeref(type));
806 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
809 type_t *unqualified_type = duplicate_type(type);
810 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
812 type_t *result = typehash_insert(unqualified_type);
813 if (result != unqualified_type) {
814 obstack_free(type_obst, unqualified_type);
820 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
822 type_t *type = skip_typeref(orig_type);
825 if (is_type_array(type)) {
826 /* For array types the element type has to be adjusted */
827 type_t *element_type = type->array.element_type;
828 type_t *qual_element_type = get_qualified_type(element_type, qual);
830 if (qual_element_type == element_type)
833 copy = duplicate_type(type);
834 copy->array.element_type = qual_element_type;
835 } else if (is_type_valid(type)) {
836 if ((type->base.qualifiers & qual) == qual)
839 copy = duplicate_type(type);
840 copy->base.qualifiers |= qual;
845 type = typehash_insert(copy);
847 obstack_free(type_obst, copy);
853 * Check if a type is valid.
855 * @param type The type to check.
856 * @return true if type represents a valid type.
858 bool type_valid(const type_t *type)
860 return type->kind != TYPE_INVALID;
863 static bool test_atomic_type_flag(atomic_type_kind_t kind,
864 atomic_type_flag_t flag)
866 assert(kind <= ATOMIC_TYPE_LAST);
867 return (atomic_type_properties[kind].flags & flag) != 0;
871 * Returns true if the given type is an integer type.
873 * @param type The type to check.
874 * @return True if type is an integer type.
876 bool is_type_integer(const type_t *type)
878 assert(!is_typeref(type));
880 if (type->kind == TYPE_ENUM)
882 if (type->kind == TYPE_BITFIELD)
885 if (type->kind != TYPE_ATOMIC)
888 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
892 * Returns true if the given type is an enum type.
894 * @param type The type to check.
895 * @return True if type is an enum type.
897 bool is_type_enum(const type_t *type)
899 assert(!is_typeref(type));
900 return type->kind == TYPE_ENUM;
904 * Returns true if the given type is an floating point type.
906 * @param type The type to check.
907 * @return True if type is a floating point type.
909 bool is_type_float(const type_t *type)
911 assert(!is_typeref(type));
913 if (type->kind != TYPE_ATOMIC)
916 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
920 * Returns true if the given type is an complex type.
922 * @param type The type to check.
923 * @return True if type is a complex type.
925 bool is_type_complex(const type_t *type)
927 assert(!is_typeref(type));
929 if (type->kind != TYPE_ATOMIC)
932 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
936 * Returns true if the given type is a signed type.
938 * @param type The type to check.
939 * @return True if type is a signed type.
941 bool is_type_signed(const type_t *type)
943 assert(!is_typeref(type));
945 /* enum types are int for now */
946 if (type->kind == TYPE_ENUM)
948 if (type->kind == TYPE_BITFIELD)
949 return is_type_signed(type->bitfield.base_type);
951 if (type->kind != TYPE_ATOMIC)
954 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
958 * Returns true if the given type represents an arithmetic type.
960 * @param type The type to check.
961 * @return True if type represents an arithmetic type.
963 bool is_type_arithmetic(const type_t *type)
965 assert(!is_typeref(type));
972 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
974 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
976 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
983 * Returns true if the given type is an integer or float type.
985 * @param type The type to check.
986 * @return True if type is an integer or float type.
988 bool is_type_real(const type_t *type)
991 return is_type_integer(type) || is_type_float(type);
995 * Returns true if the given type represents a scalar type.
997 * @param type The type to check.
998 * @return True if type represents a scalar type.
1000 bool is_type_scalar(const type_t *type)
1002 assert(!is_typeref(type));
1004 switch (type->kind) {
1005 case TYPE_POINTER: return true;
1006 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
1010 return is_type_arithmetic(type);
1014 * Check if a given type is incomplete.
1016 * @param type The type to check.
1017 * @return True if the given type is incomplete (ie. just forward).
1019 bool is_type_incomplete(const type_t *type)
1021 assert(!is_typeref(type));
1023 switch(type->kind) {
1024 case TYPE_COMPOUND_STRUCT:
1025 case TYPE_COMPOUND_UNION: {
1026 const compound_type_t *compound_type = &type->compound;
1027 return !compound_type->compound->complete;
1033 return type->array.size_expression == NULL
1034 && !type->array.size_constant;
1037 return type->atomic.akind == ATOMIC_TYPE_VOID;
1040 return type->complex.akind == ATOMIC_TYPE_VOID;
1042 case TYPE_IMAGINARY:
1043 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1048 case TYPE_REFERENCE:
1055 panic("is_type_incomplete called without typerefs skipped");
1060 panic("invalid type found");
1063 bool is_type_object(const type_t *type)
1065 return !is_type_function(type) && !is_type_incomplete(type);
1069 * Check if two function types are compatible.
1071 static bool function_types_compatible(const function_type_t *func1,
1072 const function_type_t *func2)
1074 const type_t* const ret1 = skip_typeref(func1->return_type);
1075 const type_t* const ret2 = skip_typeref(func2->return_type);
1076 if (!types_compatible(ret1, ret2))
1079 if (func1->linkage != func2->linkage)
1082 if (func1->calling_convention != func2->calling_convention)
1085 /* can parameters be compared? */
1086 if (func1->unspecified_parameters || func2->unspecified_parameters)
1089 if (func1->variadic != func2->variadic)
1092 /* TODO: handling of unspecified parameters not correct yet */
1094 /* all argument types must be compatible */
1095 function_parameter_t *parameter1 = func1->parameters;
1096 function_parameter_t *parameter2 = func2->parameters;
1097 for ( ; parameter1 != NULL && parameter2 != NULL;
1098 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1099 type_t *parameter1_type = skip_typeref(parameter1->type);
1100 type_t *parameter2_type = skip_typeref(parameter2->type);
1102 parameter1_type = get_unqualified_type(parameter1_type);
1103 parameter2_type = get_unqualified_type(parameter2_type);
1105 if (!types_compatible(parameter1_type, parameter2_type))
1108 /* same number of arguments? */
1109 if (parameter1 != NULL || parameter2 != NULL)
1116 * Check if two array types are compatible.
1118 static bool array_types_compatible(const array_type_t *array1,
1119 const array_type_t *array2)
1121 type_t *element_type1 = skip_typeref(array1->element_type);
1122 type_t *element_type2 = skip_typeref(array2->element_type);
1123 if (!types_compatible(element_type1, element_type2))
1126 if (!array1->size_constant || !array2->size_constant)
1129 return array1->size == array2->size;
1133 * Check if two types are compatible.
1135 bool types_compatible(const type_t *type1, const type_t *type2)
1137 assert(!is_typeref(type1));
1138 assert(!is_typeref(type2));
1140 /* shortcut: the same type is always compatible */
1144 if (!is_type_valid(type1) || !is_type_valid(type2))
1147 if (type1->base.qualifiers != type2->base.qualifiers)
1149 if (type1->kind != type2->kind)
1152 switch (type1->kind) {
1154 return function_types_compatible(&type1->function, &type2->function);
1156 return type1->atomic.akind == type2->atomic.akind;
1158 return type1->complex.akind == type2->complex.akind;
1159 case TYPE_IMAGINARY:
1160 return type1->imaginary.akind == type2->imaginary.akind;
1162 return array_types_compatible(&type1->array, &type2->array);
1164 case TYPE_POINTER: {
1165 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1166 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1167 return types_compatible(to1, to2);
1170 case TYPE_REFERENCE: {
1171 const type_t *const to1 = skip_typeref(type1->reference.refers_to);
1172 const type_t *const to2 = skip_typeref(type2->reference.refers_to);
1173 return types_compatible(to1, to2);
1176 case TYPE_COMPOUND_STRUCT:
1177 case TYPE_COMPOUND_UNION:
1180 /* TODO: not implemented */
1184 /* not sure if this makes sense or is even needed, implement it if you
1185 * really need it! */
1186 panic("type compatibility check for bitfield type");
1189 /* Hmm, the error type should be compatible to all other types */
1192 panic("invalid type found in compatible types");
1195 panic("typerefs not skipped in compatible types?!?");
1198 /* TODO: incomplete */
1203 * Skip all typerefs and return the underlying type.
1205 type_t *skip_typeref(type_t *type)
1207 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1208 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1211 switch (type->kind) {
1214 case TYPE_TYPEDEF: {
1215 qualifiers |= type->base.qualifiers;
1216 modifiers |= type->base.modifiers;
1217 const typedef_type_t *typedef_type = &type->typedeft;
1218 if (typedef_type->resolved_type != NULL) {
1219 type = typedef_type->resolved_type;
1222 type = typedef_type->typedefe->type;
1226 const typeof_type_t *typeof_type = &type->typeoft;
1227 if (typeof_type->typeof_type != NULL) {
1228 type = typeof_type->typeof_type;
1230 type = typeof_type->expression->base.type;
1240 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1241 type_t *const copy = duplicate_type(type);
1243 /* for const with typedefed array type the element type has to be
1245 if (is_type_array(copy)) {
1246 type_t *element_type = copy->array.element_type;
1247 element_type = duplicate_type(element_type);
1248 element_type->base.qualifiers |= qualifiers;
1249 element_type->base.modifiers |= modifiers;
1250 copy->array.element_type = element_type;
1252 copy->base.qualifiers |= qualifiers;
1253 copy->base.modifiers |= modifiers;
1256 type = typehash_insert(copy);
1258 obstack_free(type_obst, copy);
1265 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1266 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1269 switch (type->base.kind) {
1271 return TYPE_QUALIFIER_NONE;
1273 qualifiers |= type->base.qualifiers;
1274 const typedef_type_t *typedef_type = &type->typedeft;
1275 if (typedef_type->resolved_type != NULL)
1276 type = typedef_type->resolved_type;
1278 type = typedef_type->typedefe->type;
1281 const typeof_type_t *typeof_type = &type->typeoft;
1282 if (typeof_type->typeof_type != NULL) {
1283 type = typeof_type->typeof_type;
1285 type = typeof_type->expression->base.type;
1290 if (skip_array_type) {
1291 type = type->array.element_type;
1300 return type->base.qualifiers | qualifiers;
1303 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1305 assert(kind <= ATOMIC_TYPE_LAST);
1306 return atomic_type_properties[kind].size;
1309 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1311 assert(kind <= ATOMIC_TYPE_LAST);
1312 return atomic_type_properties[kind].alignment;
1315 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1317 assert(kind <= ATOMIC_TYPE_LAST);
1318 return atomic_type_properties[kind].flags;
1321 atomic_type_kind_t get_intptr_kind(void)
1323 if (machine_size <= 32)
1324 return ATOMIC_TYPE_INT;
1325 else if (machine_size <= 64)
1326 return ATOMIC_TYPE_LONG;
1328 return ATOMIC_TYPE_LONGLONG;
1331 atomic_type_kind_t get_uintptr_kind(void)
1333 if (machine_size <= 32)
1334 return ATOMIC_TYPE_UINT;
1335 else if (machine_size <= 64)
1336 return ATOMIC_TYPE_ULONG;
1338 return ATOMIC_TYPE_ULONGLONG;
1342 * Find the atomic type kind representing a given size (signed).
1344 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1345 static atomic_type_kind_t kinds[32];
1348 atomic_type_kind_t kind = kinds[size];
1349 if (kind == ATOMIC_TYPE_INVALID) {
1350 static const atomic_type_kind_t possible_kinds[] = {
1355 ATOMIC_TYPE_LONGLONG
1357 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1358 if (get_atomic_type_size(possible_kinds[i]) == size) {
1359 kind = possible_kinds[i];
1369 * Find the atomic type kind representing a given size (signed).
1371 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1372 static atomic_type_kind_t kinds[32];
1375 atomic_type_kind_t kind = kinds[size];
1376 if (kind == ATOMIC_TYPE_INVALID) {
1377 static const atomic_type_kind_t possible_kinds[] = {
1382 ATOMIC_TYPE_ULONGLONG
1384 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1385 if (get_atomic_type_size(possible_kinds[i]) == size) {
1386 kind = possible_kinds[i];
1396 * Hash the given type and return the "singleton" version
1399 static type_t *identify_new_type(type_t *type)
1401 type_t *result = typehash_insert(type);
1402 if (result != type) {
1403 obstack_free(type_obst, type);
1409 * Creates a new atomic type.
1411 * @param akind The kind of the atomic type.
1412 * @param qualifiers Type qualifiers for the new type.
1414 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1416 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1417 memset(type, 0, sizeof(atomic_type_t));
1419 type->kind = TYPE_ATOMIC;
1420 type->base.size = get_atomic_type_size(akind);
1421 type->base.alignment = get_atomic_type_alignment(akind);
1422 type->base.qualifiers = qualifiers;
1423 type->atomic.akind = akind;
1425 return identify_new_type(type);
1429 * Creates a new complex type.
1431 * @param akind The kind of the atomic type.
1432 * @param qualifiers Type qualifiers for the new type.
1434 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1436 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1437 memset(type, 0, sizeof(complex_type_t));
1439 type->kind = TYPE_COMPLEX;
1440 type->base.qualifiers = qualifiers;
1441 type->base.alignment = get_atomic_type_alignment(akind);
1442 type->complex.akind = akind;
1444 return identify_new_type(type);
1448 * Creates a new imaginary type.
1450 * @param akind The kind of the atomic type.
1451 * @param qualifiers Type qualifiers for the new type.
1453 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1455 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1456 memset(type, 0, sizeof(imaginary_type_t));
1458 type->kind = TYPE_IMAGINARY;
1459 type->base.qualifiers = qualifiers;
1460 type->base.alignment = get_atomic_type_alignment(akind);
1461 type->imaginary.akind = akind;
1463 return identify_new_type(type);
1467 * Creates a new pointer type.
1469 * @param points_to The points-to type for the new type.
1470 * @param qualifiers Type qualifiers for the new type.
1472 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1474 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1475 memset(type, 0, sizeof(pointer_type_t));
1477 type->kind = TYPE_POINTER;
1478 type->base.qualifiers = qualifiers;
1479 type->base.alignment = 0;
1480 type->pointer.points_to = points_to;
1481 type->pointer.base_variable = NULL;
1483 return identify_new_type(type);
1487 * Creates a new reference type.
1489 * @param refers_to The referred-to type for the new type.
1491 type_t *make_reference_type(type_t *refers_to)
1493 type_t *type = obstack_alloc(type_obst, sizeof(reference_type_t));
1494 memset(type, 0, sizeof(reference_type_t));
1496 type->kind = TYPE_REFERENCE;
1497 type->base.qualifiers = 0;
1498 type->base.alignment = 0;
1499 type->reference.refers_to = refers_to;
1501 return identify_new_type(type);
1505 * Creates a new based pointer type.
1507 * @param points_to The points-to type for the new type.
1508 * @param qualifiers Type qualifiers for the new type.
1509 * @param variable The based variable
1511 type_t *make_based_pointer_type(type_t *points_to,
1512 type_qualifiers_t qualifiers, variable_t *variable)
1514 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1515 memset(type, 0, sizeof(pointer_type_t));
1517 type->kind = TYPE_POINTER;
1518 type->base.qualifiers = qualifiers;
1519 type->base.alignment = 0;
1520 type->pointer.points_to = points_to;
1521 type->pointer.base_variable = variable;
1523 return identify_new_type(type);
1527 type_t *make_array_type(type_t *element_type, size_t size,
1528 type_qualifiers_t qualifiers)
1530 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1531 memset(type, 0, sizeof(array_type_t));
1533 type->kind = TYPE_ARRAY;
1534 type->base.qualifiers = qualifiers;
1535 type->base.alignment = 0;
1536 type->array.element_type = element_type;
1537 type->array.size = size;
1538 type->array.size_constant = true;
1540 return identify_new_type(type);
1544 * Debug helper. Prints the given type to stdout.
1546 static __attribute__((unused))
1547 void dbg_type(const type_t *type)
1549 FILE *old_out = out;