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 const type_t *const type = parameter->declaration.type;
368 fputs(parameter->base.symbol->string, out);
370 print_type_ext(type, parameter->base.symbol, NULL);
374 if (type->variadic) {
382 if (first && !type->unspecified_parameters) {
387 intern_print_type_post(type->return_type, false);
391 * Prints the prefix part of a pointer type.
393 * @param type The pointer type.
395 static void print_pointer_type_pre(const pointer_type_t *type)
397 intern_print_type_pre(type->points_to, false);
398 variable_t *const variable = type->base_variable;
399 if (variable != NULL) {
400 fputs(" __based(", out);
401 fputs(variable->base.base.symbol->string, out);
405 print_type_qualifiers(type->base.qualifiers);
406 if (type->base.qualifiers != 0)
411 * Prints the prefix part of a reference type.
413 * @param type The reference type.
415 static void print_reference_type_pre(const reference_type_t *type)
417 intern_print_type_pre(type->refers_to, false);
422 * Prints the postfix part of a pointer type.
424 * @param type The pointer type.
426 static void print_pointer_type_post(const pointer_type_t *type)
428 intern_print_type_post(type->points_to, false);
432 * Prints the postfix part of a reference type.
434 * @param type The reference type.
436 static void print_reference_type_post(const reference_type_t *type)
438 intern_print_type_post(type->refers_to, false);
442 * Prints the prefix part of an array type.
444 * @param type The array type.
446 static void print_array_type_pre(const array_type_t *type)
448 intern_print_type_pre(type->element_type, false);
452 * Prints the postfix part of an array type.
454 * @param type The array type.
456 static void print_array_type_post(const array_type_t *type)
459 if (type->is_static) {
460 fputs("static ", out);
462 print_type_qualifiers(type->base.qualifiers);
463 if (type->base.qualifiers != 0)
465 if (type->size_expression != NULL
466 && (print_implicit_array_size || !type->has_implicit_size)) {
467 print_expression(type->size_expression);
470 intern_print_type_post(type->element_type, false);
474 * Prints the postfix part of a bitfield type.
476 * @param type The array type.
478 static void print_bitfield_type_post(const bitfield_type_t *type)
481 print_expression(type->size_expression);
482 intern_print_type_post(type->base_type, false);
486 * Prints an enum definition.
488 * @param declaration The enum's type declaration.
490 void print_enum_definition(const enum_t *enume)
496 entity_t *entry = enume->base.next;
497 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
498 entry = entry->base.next) {
501 fputs(entry->base.symbol->string, out);
502 if (entry->enum_value.value != NULL) {
505 /* skip the implicit cast */
506 expression_t *expression = entry->enum_value.value;
507 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
508 expression = expression->unary.value;
510 print_expression(expression);
521 * Prints an enum type.
523 * @param type The enum type.
525 static void print_type_enum(const enum_type_t *type)
527 int empty = type->base.qualifiers == 0;
528 print_type_qualifiers(type->base.qualifiers);
529 fputs(" enum " + empty, out);
531 enum_t *enume = type->enume;
532 symbol_t *symbol = enume->base.symbol;
533 if (symbol != NULL) {
534 fputs(symbol->string, out);
536 print_enum_definition(enume);
541 * Print the compound part of a compound type.
543 void print_compound_definition(const compound_t *compound)
548 entity_t *entity = compound->members.entities;
549 for( ; entity != NULL; entity = entity->base.next) {
550 if (entity->kind != ENTITY_COMPOUND_MEMBER)
554 print_entity(entity);
561 if (compound->modifiers & DM_TRANSPARENT_UNION) {
562 fputs("__attribute__((__transparent_union__))", out);
567 * Prints a compound type.
569 * @param type The compound type.
571 static void print_compound_type(const compound_type_t *type)
573 int empty = type->base.qualifiers == 0;
574 print_type_qualifiers(type->base.qualifiers);
576 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
577 fputs(" struct " + empty, out);
579 assert(type->base.kind == TYPE_COMPOUND_UNION);
580 fputs(" union " + empty, out);
583 compound_t *compound = type->compound;
584 symbol_t *symbol = compound->base.symbol;
585 if (symbol != NULL) {
586 fputs(symbol->string, out);
588 print_compound_definition(compound);
593 * Prints the prefix part of a typedef type.
595 * @param type The typedef type.
597 static void print_typedef_type_pre(const typedef_type_t *const type)
599 print_type_qualifiers(type->base.qualifiers);
600 if (type->base.qualifiers != 0)
602 fputs(type->typedefe->base.symbol->string, out);
606 * Prints the prefix part of a typeof type.
608 * @param type The typeof type.
610 static void print_typeof_type_pre(const typeof_type_t *const type)
612 fputs("typeof(", out);
613 if (type->expression != NULL) {
614 assert(type->typeof_type == NULL);
615 print_expression(type->expression);
617 print_type(type->typeof_type);
623 * Prints the prefix part of a type.
625 * @param type The type.
626 * @param top true if we print the toplevel type, false else.
628 static void intern_print_type_pre(const type_t *const type, const bool top)
632 fputs("<error>", out);
635 fputs("<invalid>", out);
638 print_type_enum(&type->enumt);
641 print_atomic_type(&type->atomic);
644 print_complex_type(&type->complex);
647 print_imaginary_type(&type->imaginary);
649 case TYPE_COMPOUND_STRUCT:
650 case TYPE_COMPOUND_UNION:
651 print_compound_type(&type->compound);
654 fputs(type->builtin.symbol->string, out);
657 print_function_type_pre(&type->function, top);
660 print_pointer_type_pre(&type->pointer);
663 print_reference_type_pre(&type->reference);
666 intern_print_type_pre(type->bitfield.base_type, top);
669 print_array_type_pre(&type->array);
672 print_typedef_type_pre(&type->typedeft);
675 print_typeof_type_pre(&type->typeoft);
678 fputs("unknown", out);
682 * Prints the postfix part of a type.
684 * @param type The type.
685 * @param top true if we print the toplevel type, false else.
687 static void intern_print_type_post(const type_t *const type, const bool top)
691 print_function_type_post(&type->function, NULL, top);
694 print_pointer_type_post(&type->pointer);
697 print_reference_type_post(&type->reference);
700 print_array_type_post(&type->array);
703 print_bitfield_type_post(&type->bitfield);
711 case TYPE_COMPOUND_STRUCT:
712 case TYPE_COMPOUND_UNION:
719 if (type->base.modifiers & DM_TRANSPARENT_UNION) {
720 fputs("__attribute__((__transparent_union__))", out);
727 * @param type The type.
729 void print_type(const type_t *const type)
731 print_type_ext(type, NULL, NULL);
734 void print_type_ext(const type_t *const type, const symbol_t *symbol,
735 const scope_t *parameters)
738 fputs("nil type", out);
742 intern_print_type_pre(type, true);
743 if (symbol != NULL) {
745 fputs(symbol->string, out);
747 if (type->kind == TYPE_FUNCTION) {
748 print_function_type_post(&type->function, parameters, true);
750 intern_print_type_post(type, true);
755 * Return the size of a type AST node.
757 * @param type The type.
759 static size_t get_type_size(const type_t *type)
762 case TYPE_ATOMIC: return sizeof(atomic_type_t);
763 case TYPE_COMPLEX: return sizeof(complex_type_t);
764 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
765 case TYPE_COMPOUND_STRUCT:
766 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
767 case TYPE_ENUM: return sizeof(enum_type_t);
768 case TYPE_FUNCTION: return sizeof(function_type_t);
769 case TYPE_POINTER: return sizeof(pointer_type_t);
770 case TYPE_REFERENCE: return sizeof(reference_type_t);
771 case TYPE_ARRAY: return sizeof(array_type_t);
772 case TYPE_BUILTIN: return sizeof(builtin_type_t);
773 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
774 case TYPE_TYPEOF: return sizeof(typeof_type_t);
775 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
776 case TYPE_ERROR: panic("error type found");
777 case TYPE_INVALID: panic("invalid type found");
779 panic("unknown type found");
785 * @param type The type to copy.
786 * @return A copy of the type.
788 * @note This does not produce a deep copy!
790 type_t *duplicate_type(const type_t *type)
792 size_t size = get_type_size(type);
794 type_t *copy = obstack_alloc(type_obst, size);
795 memcpy(copy, type, size);
801 * Returns the unqualified type of a given type.
803 * @param type The type.
804 * @returns The unqualified type.
806 type_t *get_unqualified_type(type_t *type)
808 assert(!is_typeref(type));
810 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
813 type_t *unqualified_type = duplicate_type(type);
814 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
816 type_t *result = typehash_insert(unqualified_type);
817 if (result != unqualified_type) {
818 obstack_free(type_obst, unqualified_type);
824 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
826 type_t *type = skip_typeref(orig_type);
829 if (is_type_array(type)) {
830 /* For array types the element type has to be adjusted */
831 type_t *element_type = type->array.element_type;
832 type_t *qual_element_type = get_qualified_type(element_type, qual);
834 if (qual_element_type == element_type)
837 copy = duplicate_type(type);
838 copy->array.element_type = qual_element_type;
839 } else if (is_type_valid(type)) {
840 if ((type->base.qualifiers & qual) == qual)
843 copy = duplicate_type(type);
844 copy->base.qualifiers |= qual;
849 type = typehash_insert(copy);
851 obstack_free(type_obst, copy);
857 * Check if a type is valid.
859 * @param type The type to check.
860 * @return true if type represents a valid type.
862 bool type_valid(const type_t *type)
864 return type->kind != TYPE_INVALID;
867 static bool test_atomic_type_flag(atomic_type_kind_t kind,
868 atomic_type_flag_t flag)
870 assert(kind <= ATOMIC_TYPE_LAST);
871 return (atomic_type_properties[kind].flags & flag) != 0;
875 * Returns true if the given type is an integer type.
877 * @param type The type to check.
878 * @return True if type is an integer type.
880 bool is_type_integer(const type_t *type)
882 assert(!is_typeref(type));
884 if (type->kind == TYPE_ENUM)
886 if (type->kind == TYPE_BITFIELD)
889 if (type->kind != TYPE_ATOMIC)
892 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
896 * Returns true if the given type is an enum type.
898 * @param type The type to check.
899 * @return True if type is an enum type.
901 bool is_type_enum(const type_t *type)
903 assert(!is_typeref(type));
904 return type->kind == TYPE_ENUM;
908 * Returns true if the given type is an floating point type.
910 * @param type The type to check.
911 * @return True if type is a floating point type.
913 bool is_type_float(const type_t *type)
915 assert(!is_typeref(type));
917 if (type->kind != TYPE_ATOMIC)
920 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
924 * Returns true if the given type is an complex type.
926 * @param type The type to check.
927 * @return True if type is a complex type.
929 bool is_type_complex(const type_t *type)
931 assert(!is_typeref(type));
933 if (type->kind != TYPE_ATOMIC)
936 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
940 * Returns true if the given type is a signed type.
942 * @param type The type to check.
943 * @return True if type is a signed type.
945 bool is_type_signed(const type_t *type)
947 assert(!is_typeref(type));
949 /* enum types are int for now */
950 if (type->kind == TYPE_ENUM)
952 if (type->kind == TYPE_BITFIELD)
953 return is_type_signed(type->bitfield.base_type);
955 if (type->kind != TYPE_ATOMIC)
958 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
962 * Returns true if the given type represents an arithmetic type.
964 * @param type The type to check.
965 * @return True if type represents an arithmetic type.
967 bool is_type_arithmetic(const type_t *type)
969 assert(!is_typeref(type));
976 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
978 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
980 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
987 * Returns true if the given type is an integer or float type.
989 * @param type The type to check.
990 * @return True if type is an integer or float type.
992 bool is_type_real(const type_t *type)
995 return is_type_integer(type) || is_type_float(type);
999 * Returns true if the given type represents a scalar type.
1001 * @param type The type to check.
1002 * @return True if type represents a scalar type.
1004 bool is_type_scalar(const type_t *type)
1006 assert(!is_typeref(type));
1008 switch (type->kind) {
1009 case TYPE_POINTER: return true;
1010 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
1014 return is_type_arithmetic(type);
1018 * Check if a given type is incomplete.
1020 * @param type The type to check.
1021 * @return True if the given type is incomplete (ie. just forward).
1023 bool is_type_incomplete(const type_t *type)
1025 assert(!is_typeref(type));
1027 switch(type->kind) {
1028 case TYPE_COMPOUND_STRUCT:
1029 case TYPE_COMPOUND_UNION: {
1030 const compound_type_t *compound_type = &type->compound;
1031 return !compound_type->compound->complete;
1037 return type->array.size_expression == NULL
1038 && !type->array.size_constant;
1041 return type->atomic.akind == ATOMIC_TYPE_VOID;
1044 return type->complex.akind == ATOMIC_TYPE_VOID;
1046 case TYPE_IMAGINARY:
1047 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1052 case TYPE_REFERENCE:
1059 panic("is_type_incomplete called without typerefs skipped");
1064 panic("invalid type found");
1067 bool is_type_object(const type_t *type)
1069 return !is_type_function(type) && !is_type_incomplete(type);
1073 * Check if two function types are compatible.
1075 static bool function_types_compatible(const function_type_t *func1,
1076 const function_type_t *func2)
1078 const type_t* const ret1 = skip_typeref(func1->return_type);
1079 const type_t* const ret2 = skip_typeref(func2->return_type);
1080 if (!types_compatible(ret1, ret2))
1083 if (func1->linkage != func2->linkage)
1086 if (func1->calling_convention != func2->calling_convention)
1089 /* can parameters be compared? */
1090 if (func1->unspecified_parameters || func2->unspecified_parameters)
1093 if (func1->variadic != func2->variadic)
1096 /* TODO: handling of unspecified parameters not correct yet */
1098 /* all argument types must be compatible */
1099 function_parameter_t *parameter1 = func1->parameters;
1100 function_parameter_t *parameter2 = func2->parameters;
1101 for ( ; parameter1 != NULL && parameter2 != NULL;
1102 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1103 type_t *parameter1_type = skip_typeref(parameter1->type);
1104 type_t *parameter2_type = skip_typeref(parameter2->type);
1106 parameter1_type = get_unqualified_type(parameter1_type);
1107 parameter2_type = get_unqualified_type(parameter2_type);
1109 if (!types_compatible(parameter1_type, parameter2_type))
1112 /* same number of arguments? */
1113 if (parameter1 != NULL || parameter2 != NULL)
1120 * Check if two array types are compatible.
1122 static bool array_types_compatible(const array_type_t *array1,
1123 const array_type_t *array2)
1125 type_t *element_type1 = skip_typeref(array1->element_type);
1126 type_t *element_type2 = skip_typeref(array2->element_type);
1127 if (!types_compatible(element_type1, element_type2))
1130 if (!array1->size_constant || !array2->size_constant)
1133 return array1->size == array2->size;
1137 * Check if two types are compatible.
1139 bool types_compatible(const type_t *type1, const type_t *type2)
1141 assert(!is_typeref(type1));
1142 assert(!is_typeref(type2));
1144 /* shortcut: the same type is always compatible */
1148 if (!is_type_valid(type1) || !is_type_valid(type2))
1151 if (type1->base.qualifiers != type2->base.qualifiers)
1153 if (type1->kind != type2->kind)
1156 switch (type1->kind) {
1158 return function_types_compatible(&type1->function, &type2->function);
1160 return type1->atomic.akind == type2->atomic.akind;
1162 return type1->complex.akind == type2->complex.akind;
1163 case TYPE_IMAGINARY:
1164 return type1->imaginary.akind == type2->imaginary.akind;
1166 return array_types_compatible(&type1->array, &type2->array);
1168 case TYPE_POINTER: {
1169 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1170 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1171 return types_compatible(to1, to2);
1174 case TYPE_REFERENCE: {
1175 const type_t *const to1 = skip_typeref(type1->reference.refers_to);
1176 const type_t *const to2 = skip_typeref(type2->reference.refers_to);
1177 return types_compatible(to1, to2);
1180 case TYPE_COMPOUND_STRUCT:
1181 case TYPE_COMPOUND_UNION:
1184 /* TODO: not implemented */
1188 /* not sure if this makes sense or is even needed, implement it if you
1189 * really need it! */
1190 panic("type compatibility check for bitfield type");
1193 /* Hmm, the error type should be compatible to all other types */
1196 panic("invalid type found in compatible types");
1199 panic("typerefs not skipped in compatible types?!?");
1202 /* TODO: incomplete */
1207 * Skip all typerefs and return the underlying type.
1209 type_t *skip_typeref(type_t *type)
1211 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1212 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1215 switch (type->kind) {
1218 case TYPE_TYPEDEF: {
1219 qualifiers |= type->base.qualifiers;
1220 modifiers |= type->base.modifiers;
1221 const typedef_type_t *typedef_type = &type->typedeft;
1222 if (typedef_type->resolved_type != NULL) {
1223 type = typedef_type->resolved_type;
1226 type = typedef_type->typedefe->type;
1230 const typeof_type_t *typeof_type = &type->typeoft;
1231 if (typeof_type->typeof_type != NULL) {
1232 type = typeof_type->typeof_type;
1234 type = typeof_type->expression->base.type;
1244 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1245 type_t *const copy = duplicate_type(type);
1247 /* for const with typedefed array type the element type has to be
1249 if (is_type_array(copy)) {
1250 type_t *element_type = copy->array.element_type;
1251 element_type = duplicate_type(element_type);
1252 element_type->base.qualifiers |= qualifiers;
1253 element_type->base.modifiers |= modifiers;
1254 copy->array.element_type = element_type;
1256 copy->base.qualifiers |= qualifiers;
1257 copy->base.modifiers |= modifiers;
1260 type = typehash_insert(copy);
1262 obstack_free(type_obst, copy);
1269 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1270 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1273 switch (type->base.kind) {
1275 return TYPE_QUALIFIER_NONE;
1277 qualifiers |= type->base.qualifiers;
1278 const typedef_type_t *typedef_type = &type->typedeft;
1279 if (typedef_type->resolved_type != NULL)
1280 type = typedef_type->resolved_type;
1282 type = typedef_type->typedefe->type;
1285 const typeof_type_t *typeof_type = &type->typeoft;
1286 if (typeof_type->typeof_type != NULL) {
1287 type = typeof_type->typeof_type;
1289 type = typeof_type->expression->base.type;
1294 if (skip_array_type) {
1295 type = type->array.element_type;
1304 return type->base.qualifiers | qualifiers;
1307 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1309 assert(kind <= ATOMIC_TYPE_LAST);
1310 return atomic_type_properties[kind].size;
1313 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1315 assert(kind <= ATOMIC_TYPE_LAST);
1316 return atomic_type_properties[kind].alignment;
1319 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1321 assert(kind <= ATOMIC_TYPE_LAST);
1322 return atomic_type_properties[kind].flags;
1325 atomic_type_kind_t get_intptr_kind(void)
1327 if (machine_size <= 32)
1328 return ATOMIC_TYPE_INT;
1329 else if (machine_size <= 64)
1330 return ATOMIC_TYPE_LONG;
1332 return ATOMIC_TYPE_LONGLONG;
1335 atomic_type_kind_t get_uintptr_kind(void)
1337 if (machine_size <= 32)
1338 return ATOMIC_TYPE_UINT;
1339 else if (machine_size <= 64)
1340 return ATOMIC_TYPE_ULONG;
1342 return ATOMIC_TYPE_ULONGLONG;
1346 * Find the atomic type kind representing a given size (signed).
1348 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1349 static atomic_type_kind_t kinds[32];
1352 atomic_type_kind_t kind = kinds[size];
1353 if (kind == ATOMIC_TYPE_INVALID) {
1354 static const atomic_type_kind_t possible_kinds[] = {
1359 ATOMIC_TYPE_LONGLONG
1361 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1362 if (get_atomic_type_size(possible_kinds[i]) == size) {
1363 kind = possible_kinds[i];
1373 * Find the atomic type kind representing a given size (signed).
1375 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1376 static atomic_type_kind_t kinds[32];
1379 atomic_type_kind_t kind = kinds[size];
1380 if (kind == ATOMIC_TYPE_INVALID) {
1381 static const atomic_type_kind_t possible_kinds[] = {
1386 ATOMIC_TYPE_ULONGLONG
1388 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1389 if (get_atomic_type_size(possible_kinds[i]) == size) {
1390 kind = possible_kinds[i];
1400 * Hash the given type and return the "singleton" version
1403 static type_t *identify_new_type(type_t *type)
1405 type_t *result = typehash_insert(type);
1406 if (result != type) {
1407 obstack_free(type_obst, type);
1413 * Creates a new atomic type.
1415 * @param akind The kind of the atomic type.
1416 * @param qualifiers Type qualifiers for the new type.
1418 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1420 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1421 memset(type, 0, sizeof(atomic_type_t));
1423 type->kind = TYPE_ATOMIC;
1424 type->base.size = get_atomic_type_size(akind);
1425 type->base.alignment = get_atomic_type_alignment(akind);
1426 type->base.qualifiers = qualifiers;
1427 type->atomic.akind = akind;
1429 return identify_new_type(type);
1433 * Creates a new complex type.
1435 * @param akind The kind of the atomic type.
1436 * @param qualifiers Type qualifiers for the new type.
1438 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1440 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1441 memset(type, 0, sizeof(complex_type_t));
1443 type->kind = TYPE_COMPLEX;
1444 type->base.qualifiers = qualifiers;
1445 type->base.alignment = get_atomic_type_alignment(akind);
1446 type->complex.akind = akind;
1448 return identify_new_type(type);
1452 * Creates a new imaginary type.
1454 * @param akind The kind of the atomic type.
1455 * @param qualifiers Type qualifiers for the new type.
1457 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1459 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1460 memset(type, 0, sizeof(imaginary_type_t));
1462 type->kind = TYPE_IMAGINARY;
1463 type->base.qualifiers = qualifiers;
1464 type->base.alignment = get_atomic_type_alignment(akind);
1465 type->imaginary.akind = akind;
1467 return identify_new_type(type);
1471 * Creates a new pointer type.
1473 * @param points_to The points-to type for the new type.
1474 * @param qualifiers Type qualifiers for the new type.
1476 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1478 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1479 memset(type, 0, sizeof(pointer_type_t));
1481 type->kind = TYPE_POINTER;
1482 type->base.qualifiers = qualifiers;
1483 type->base.alignment = 0;
1484 type->pointer.points_to = points_to;
1485 type->pointer.base_variable = NULL;
1487 return identify_new_type(type);
1491 * Creates a new reference type.
1493 * @param refers_to The referred-to type for the new type.
1495 type_t *make_reference_type(type_t *refers_to)
1497 type_t *type = obstack_alloc(type_obst, sizeof(reference_type_t));
1498 memset(type, 0, sizeof(reference_type_t));
1500 type->kind = TYPE_REFERENCE;
1501 type->base.qualifiers = 0;
1502 type->base.alignment = 0;
1503 type->reference.refers_to = refers_to;
1505 return identify_new_type(type);
1509 * Creates a new based pointer type.
1511 * @param points_to The points-to type for the new type.
1512 * @param qualifiers Type qualifiers for the new type.
1513 * @param variable The based variable
1515 type_t *make_based_pointer_type(type_t *points_to,
1516 type_qualifiers_t qualifiers, variable_t *variable)
1518 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1519 memset(type, 0, sizeof(pointer_type_t));
1521 type->kind = TYPE_POINTER;
1522 type->base.qualifiers = qualifiers;
1523 type->base.alignment = 0;
1524 type->pointer.points_to = points_to;
1525 type->pointer.base_variable = variable;
1527 return identify_new_type(type);
1531 type_t *make_array_type(type_t *element_type, size_t size,
1532 type_qualifiers_t qualifiers)
1534 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1535 memset(type, 0, sizeof(array_type_t));
1537 type->kind = TYPE_ARRAY;
1538 type->base.qualifiers = qualifiers;
1539 type->base.alignment = 0;
1540 type->array.element_type = element_type;
1541 type->array.size = size;
1542 type->array.size_constant = true;
1544 return identify_new_type(type);
1548 * Debug helper. Prints the given type to stdout.
1550 static __attribute__((unused))
1551 void dbg_type(const type_t *type)
1553 FILE *old_out = out;