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 if (type->linkage != NULL) {
299 fputs("extern \"", out);
300 fputs(type->linkage->string, out);
304 print_type_qualifiers(type->base.qualifiers);
305 if (type->base.qualifiers != 0)
308 intern_print_type_pre(type->return_type, false);
311 /* TODO: revive with linkage */
312 switch (type->linkage) {
314 fputs("__cdecl ", out);
317 fputs("__stdcall ", out);
320 fputs("__fastcall ", out);
323 fputs("__thiscall ", out);
330 /* don't emit parenthesis if we're the toplevel type... */
336 * Print the second part (the postfix) of a type.
338 * @param type The type to print.
339 * @param top true, if this is the top type, false if it's an embedded type.
341 static void print_function_type_post(const function_type_t *type,
342 const scope_t *parameters, bool top)
344 /* don't emit parenthesis if we're the toplevel type... */
350 if (parameters == NULL) {
351 function_parameter_t *parameter = type->parameters;
352 for( ; parameter != NULL; parameter = parameter->next) {
358 print_type(parameter->type);
361 entity_t *parameter = parameters->entities;
362 for( ; parameter != NULL; parameter = parameter->base.next) {
368 assert(is_declaration(parameter));
369 print_type_ext(parameter->declaration.type, parameter->base.symbol,
373 if (type->variadic) {
381 if (first && !type->unspecified_parameters) {
386 intern_print_type_post(type->return_type, false);
390 * Prints the prefix part of a pointer type.
392 * @param type The pointer type.
394 static void print_pointer_type_pre(const pointer_type_t *type)
396 intern_print_type_pre(type->points_to, false);
398 print_type_qualifiers(type->base.qualifiers);
399 if (type->base.qualifiers != 0)
404 * Prints the postfix part of a pointer type.
406 * @param type The pointer type.
408 static void print_pointer_type_post(const pointer_type_t *type)
410 intern_print_type_post(type->points_to, false);
414 * Prints the prefix part of an array type.
416 * @param type The array type.
418 static void print_array_type_pre(const array_type_t *type)
420 intern_print_type_pre(type->element_type, false);
424 * Prints the postfix part of an array type.
426 * @param type The array type.
428 static void print_array_type_post(const array_type_t *type)
431 if (type->is_static) {
432 fputs("static ", out);
434 print_type_qualifiers(type->base.qualifiers);
435 if (type->base.qualifiers != 0)
437 if (type->size_expression != NULL
438 && (print_implicit_array_size || !type->has_implicit_size)) {
439 print_expression(type->size_expression);
442 intern_print_type_post(type->element_type, false);
446 * Prints the postfix part of a bitfield type.
448 * @param type The array type.
450 static void print_bitfield_type_post(const bitfield_type_t *type)
453 print_expression(type->size_expression);
454 intern_print_type_post(type->base_type, false);
458 * Prints an enum definition.
460 * @param declaration The enum's type declaration.
462 void print_enum_definition(const enum_t *enume)
468 entity_t *entry = enume->base.next;
469 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
470 entry = entry->base.next) {
473 fprintf(out, "%s", entry->base.symbol->string);
474 if (entry->enum_value.value != NULL) {
477 /* skip the implicit cast */
478 expression_t *expression = entry->enum_value.value;
479 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
480 expression = expression->unary.value;
482 print_expression(expression);
493 * Prints an enum type.
495 * @param type The enum type.
497 static void print_type_enum(const enum_type_t *type)
499 int empty = type->base.qualifiers == 0;
500 print_type_qualifiers(type->base.qualifiers);
501 fputs(" enum " + empty, out);
503 enum_t *enume = type->enume;
504 symbol_t *symbol = enume->base.symbol;
505 if (symbol != NULL) {
506 fputs(symbol->string, out);
508 print_enum_definition(enume);
513 * Print the compound part of a compound type.
515 void print_compound_definition(const compound_t *compound)
520 entity_t *entity = compound->members.entities;
521 for( ; entity != NULL; entity = entity->base.next) {
522 if (entity->kind != ENTITY_COMPOUND_MEMBER)
526 print_entity(entity);
536 * Prints a compound type.
538 * @param type The compound type.
540 static void print_compound_type(const compound_type_t *type)
542 int empty = type->base.qualifiers == 0;
543 print_type_qualifiers(type->base.qualifiers);
545 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
546 fputs(" struct " + empty, out);
548 assert(type->base.kind == TYPE_COMPOUND_UNION);
549 fputs(" union " + empty, out);
552 compound_t *compound = type->compound;
553 symbol_t *symbol = compound->base.symbol;
554 if (symbol != NULL) {
555 fputs(symbol->string, out);
557 print_compound_definition(compound);
562 * Prints the prefix part of a typedef type.
564 * @param type The typedef type.
566 static void print_typedef_type_pre(const typedef_type_t *const type)
568 print_type_qualifiers(type->base.qualifiers);
569 if (type->base.qualifiers != 0)
571 fputs(type->typedefe->base.symbol->string, out);
575 * Prints the prefix part of a typeof type.
577 * @param type The typeof type.
579 static void print_typeof_type_pre(const typeof_type_t *const type)
581 fputs("typeof(", out);
582 if (type->expression != NULL) {
583 assert(type->typeof_type == NULL);
584 print_expression(type->expression);
586 print_type(type->typeof_type);
592 * Prints the prefix part of a type.
594 * @param type The type.
595 * @param top true if we print the toplevel type, false else.
597 static void intern_print_type_pre(const type_t *const type, const bool top)
601 fputs("<error>", out);
604 fputs("<invalid>", out);
607 print_type_enum(&type->enumt);
610 print_atomic_type(&type->atomic);
613 print_complex_type(&type->complex);
616 print_imaginary_type(&type->imaginary);
618 case TYPE_COMPOUND_STRUCT:
619 case TYPE_COMPOUND_UNION:
620 print_compound_type(&type->compound);
623 fputs(type->builtin.symbol->string, out);
626 print_function_type_pre(&type->function, top);
629 print_pointer_type_pre(&type->pointer);
632 intern_print_type_pre(type->bitfield.base_type, top);
635 print_array_type_pre(&type->array);
638 print_typedef_type_pre(&type->typedeft);
641 print_typeof_type_pre(&type->typeoft);
644 fputs("unknown", out);
648 * Prints the postfix part of a type.
650 * @param type The type.
651 * @param top true if we print the toplevel type, false else.
653 static void intern_print_type_post(const type_t *const type, const bool top)
657 print_function_type_post(&type->function, NULL, top);
660 print_pointer_type_post(&type->pointer);
663 print_array_type_post(&type->array);
666 print_bitfield_type_post(&type->bitfield);
674 case TYPE_COMPOUND_STRUCT:
675 case TYPE_COMPOUND_UNION:
686 * @param type The type.
688 void print_type(const type_t *const type)
690 print_type_ext(type, NULL, NULL);
693 void print_type_ext(const type_t *const type, const symbol_t *symbol,
694 const scope_t *parameters)
697 fputs("nil type", out);
701 intern_print_type_pre(type, true);
702 if (symbol != NULL) {
704 fputs(symbol->string, out);
706 if (type->kind == TYPE_FUNCTION) {
707 print_function_type_post(&type->function, parameters, true);
709 intern_print_type_post(type, true);
714 * Return the size of a type AST node.
716 * @param type The type.
718 static size_t get_type_size(const type_t *type)
721 case TYPE_ATOMIC: return sizeof(atomic_type_t);
722 case TYPE_COMPLEX: return sizeof(complex_type_t);
723 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
724 case TYPE_COMPOUND_STRUCT:
725 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
726 case TYPE_ENUM: return sizeof(enum_type_t);
727 case TYPE_FUNCTION: return sizeof(function_type_t);
728 case TYPE_POINTER: return sizeof(pointer_type_t);
729 case TYPE_ARRAY: return sizeof(array_type_t);
730 case TYPE_BUILTIN: return sizeof(builtin_type_t);
731 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
732 case TYPE_TYPEOF: return sizeof(typeof_type_t);
733 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
734 case TYPE_ERROR: panic("error type found");
735 case TYPE_INVALID: panic("invalid type found");
737 panic("unknown type found");
743 * @param type The type to copy.
744 * @return A copy of the type.
746 * @note This does not produce a deep copy!
748 type_t *duplicate_type(const type_t *type)
750 size_t size = get_type_size(type);
752 type_t *copy = obstack_alloc(type_obst, size);
753 memcpy(copy, type, size);
759 * Returns the unqualified type of a given type.
761 * @param type The type.
762 * @returns The unqualified type.
764 type_t *get_unqualified_type(type_t *type)
766 assert(!is_typeref(type));
768 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
771 type_t *unqualified_type = duplicate_type(type);
772 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
774 type_t *result = typehash_insert(unqualified_type);
775 if (result != unqualified_type) {
776 obstack_free(type_obst, unqualified_type);
782 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
784 type_t *type = skip_typeref(orig_type);
787 if (is_type_array(type)) {
788 /* For array types the element type has to be adjusted */
789 type_t *element_type = type->array.element_type;
790 type_t *qual_element_type = get_qualified_type(element_type, qual);
792 if (qual_element_type == element_type)
795 copy = duplicate_type(type);
796 copy->array.element_type = qual_element_type;
797 } else if (is_type_valid(type)) {
798 if ((type->base.qualifiers & qual) == qual)
801 copy = duplicate_type(type);
802 copy->base.qualifiers |= qual;
807 type = typehash_insert(copy);
809 obstack_free(type_obst, copy);
815 * Check if a type is valid.
817 * @param type The type to check.
818 * @return true if type represents a valid type.
820 bool type_valid(const type_t *type)
822 return type->kind != TYPE_INVALID;
825 static bool test_atomic_type_flag(atomic_type_kind_t kind,
826 atomic_type_flag_t flag)
828 assert(kind <= ATOMIC_TYPE_LAST);
829 return (atomic_type_properties[kind].flags & flag) != 0;
833 * Returns true if the given type is an integer type.
835 * @param type The type to check.
836 * @return True if type is an integer type.
838 bool is_type_integer(const type_t *type)
840 assert(!is_typeref(type));
842 if (type->kind == TYPE_ENUM)
844 if (type->kind == TYPE_BITFIELD)
847 if (type->kind != TYPE_ATOMIC)
850 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
854 * Returns true if the given type is an enum type.
856 * @param type The type to check.
857 * @return True if type is an enum type.
859 bool is_type_enum(const type_t *type)
861 assert(!is_typeref(type));
862 return type->kind == TYPE_ENUM;
866 * Returns true if the given type is an floating point type.
868 * @param type The type to check.
869 * @return True if type is a floating point type.
871 bool is_type_float(const type_t *type)
873 assert(!is_typeref(type));
875 if (type->kind != TYPE_ATOMIC)
878 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
882 * Returns true if the given type is an complex type.
884 * @param type The type to check.
885 * @return True if type is a complex type.
887 bool is_type_complex(const type_t *type)
889 assert(!is_typeref(type));
891 if (type->kind != TYPE_ATOMIC)
894 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
898 * Returns true if the given type is a signed type.
900 * @param type The type to check.
901 * @return True if type is a signed type.
903 bool is_type_signed(const type_t *type)
905 assert(!is_typeref(type));
907 /* enum types are int for now */
908 if (type->kind == TYPE_ENUM)
910 if (type->kind == TYPE_BITFIELD)
911 return is_type_signed(type->bitfield.base_type);
913 if (type->kind != TYPE_ATOMIC)
916 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
920 * Returns true if the given type represents an arithmetic type.
922 * @param type The type to check.
923 * @return True if type represents an arithmetic type.
925 bool is_type_arithmetic(const type_t *type)
927 assert(!is_typeref(type));
934 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
936 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
938 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
945 * Returns true if the given type is an integer or float type.
947 * @param type The type to check.
948 * @return True if type is an integer or float type.
950 bool is_type_real(const type_t *type)
953 return is_type_integer(type) || is_type_float(type);
957 * Returns true if the given type represents a scalar type.
959 * @param type The type to check.
960 * @return True if type represents a scalar type.
962 bool is_type_scalar(const type_t *type)
964 assert(!is_typeref(type));
966 switch (type->kind) {
967 case TYPE_POINTER: return true;
968 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
972 return is_type_arithmetic(type);
976 * Check if a given type is incomplete.
978 * @param type The type to check.
979 * @return True if the given type is incomplete (ie. just forward).
981 bool is_type_incomplete(const type_t *type)
983 assert(!is_typeref(type));
986 case TYPE_COMPOUND_STRUCT:
987 case TYPE_COMPOUND_UNION: {
988 const compound_type_t *compound_type = &type->compound;
989 return !compound_type->compound->complete;
995 return type->array.size_expression == NULL
996 && !type->array.size_constant;
999 return type->atomic.akind == ATOMIC_TYPE_VOID;
1002 return type->complex.akind == ATOMIC_TYPE_VOID;
1004 case TYPE_IMAGINARY:
1005 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1016 panic("is_type_incomplete called without typerefs skipped");
1021 panic("invalid type found");
1024 bool is_type_object(const type_t *type)
1026 return !is_type_function(type) && !is_type_incomplete(type);
1030 * Check if two function types are compatible.
1032 static bool function_types_compatible(const function_type_t *func1,
1033 const function_type_t *func2)
1035 const type_t* const ret1 = skip_typeref(func1->return_type);
1036 const type_t* const ret2 = skip_typeref(func2->return_type);
1037 if (!types_compatible(ret1, ret2))
1040 if (func1->linkage != func2->linkage)
1043 /* can parameters be compared? */
1044 if (func1->unspecified_parameters || func2->unspecified_parameters)
1047 if (func1->variadic != func2->variadic)
1050 /* TODO: handling of unspecified parameters not correct yet */
1052 /* all argument types must be compatible */
1053 function_parameter_t *parameter1 = func1->parameters;
1054 function_parameter_t *parameter2 = func2->parameters;
1055 for ( ; parameter1 != NULL && parameter2 != NULL;
1056 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1057 type_t *parameter1_type = skip_typeref(parameter1->type);
1058 type_t *parameter2_type = skip_typeref(parameter2->type);
1060 parameter1_type = get_unqualified_type(parameter1_type);
1061 parameter2_type = get_unqualified_type(parameter2_type);
1063 if (!types_compatible(parameter1_type, parameter2_type))
1066 /* same number of arguments? */
1067 if (parameter1 != NULL || parameter2 != NULL)
1074 * Check if two array types are compatible.
1076 static bool array_types_compatible(const array_type_t *array1,
1077 const array_type_t *array2)
1079 type_t *element_type1 = skip_typeref(array1->element_type);
1080 type_t *element_type2 = skip_typeref(array2->element_type);
1081 if (!types_compatible(element_type1, element_type2))
1084 if (!array1->size_constant || !array2->size_constant)
1087 return array1->size == array2->size;
1091 * Check if two types are compatible.
1093 bool types_compatible(const type_t *type1, const type_t *type2)
1095 assert(!is_typeref(type1));
1096 assert(!is_typeref(type2));
1098 /* shortcut: the same type is always compatible */
1102 if (!is_type_valid(type1) || !is_type_valid(type2))
1105 if (type1->base.qualifiers != type2->base.qualifiers)
1107 if (type1->kind != type2->kind)
1110 switch (type1->kind) {
1112 return function_types_compatible(&type1->function, &type2->function);
1114 return type1->atomic.akind == type2->atomic.akind;
1116 return type1->complex.akind == type2->complex.akind;
1117 case TYPE_IMAGINARY:
1118 return type1->imaginary.akind == type2->imaginary.akind;
1120 return array_types_compatible(&type1->array, &type2->array);
1122 case TYPE_POINTER: {
1123 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1124 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1125 return types_compatible(to1, to2);
1128 case TYPE_COMPOUND_STRUCT:
1129 case TYPE_COMPOUND_UNION:
1132 /* TODO: not implemented */
1136 /* not sure if this makes sense or is even needed, implement it if you
1137 * really need it! */
1138 panic("type compatibility check for bitfield type");
1141 /* Hmm, the error type should be compatible to all other types */
1144 panic("invalid type found in compatible types");
1147 panic("typerefs not skipped in compatible types?!?");
1150 /* TODO: incomplete */
1155 * Skip all typerefs and return the underlying type.
1157 type_t *skip_typeref(type_t *type)
1159 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1160 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1163 switch (type->kind) {
1166 case TYPE_TYPEDEF: {
1167 qualifiers |= type->base.qualifiers;
1168 modifiers |= type->base.modifiers;
1169 const typedef_type_t *typedef_type = &type->typedeft;
1170 if (typedef_type->resolved_type != NULL) {
1171 type = typedef_type->resolved_type;
1174 type = typedef_type->typedefe->type;
1178 const typeof_type_t *typeof_type = &type->typeoft;
1179 if (typeof_type->typeof_type != NULL) {
1180 type = typeof_type->typeof_type;
1182 type = typeof_type->expression->base.type;
1192 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1193 type_t *const copy = duplicate_type(type);
1195 /* for const with typedefed array type the element type has to be
1197 if (is_type_array(copy)) {
1198 type_t *element_type = copy->array.element_type;
1199 element_type = duplicate_type(element_type);
1200 element_type->base.qualifiers |= qualifiers;
1201 element_type->base.modifiers |= modifiers;
1202 copy->array.element_type = element_type;
1204 copy->base.qualifiers |= qualifiers;
1205 copy->base.modifiers |= modifiers;
1208 type = typehash_insert(copy);
1210 obstack_free(type_obst, copy);
1217 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1218 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1221 switch (type->base.kind) {
1223 return TYPE_QUALIFIER_NONE;
1225 qualifiers |= type->base.qualifiers;
1226 const typedef_type_t *typedef_type = &type->typedeft;
1227 if (typedef_type->resolved_type != NULL)
1228 type = typedef_type->resolved_type;
1230 type = typedef_type->typedefe->type;
1233 const typeof_type_t *typeof_type = &type->typeoft;
1234 if (typeof_type->typeof_type != NULL) {
1235 type = typeof_type->typeof_type;
1237 type = typeof_type->expression->base.type;
1242 if (skip_array_type) {
1243 type = type->array.element_type;
1252 return type->base.qualifiers | qualifiers;
1255 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1257 assert(kind <= ATOMIC_TYPE_LAST);
1258 return atomic_type_properties[kind].size;
1261 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1263 assert(kind <= ATOMIC_TYPE_LAST);
1264 return atomic_type_properties[kind].alignment;
1267 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1269 assert(kind <= ATOMIC_TYPE_LAST);
1270 return atomic_type_properties[kind].flags;
1273 atomic_type_kind_t get_intptr_kind(void)
1275 if (machine_size <= 32)
1276 return ATOMIC_TYPE_INT;
1277 else if (machine_size <= 64)
1278 return ATOMIC_TYPE_LONG;
1280 return ATOMIC_TYPE_LONGLONG;
1283 atomic_type_kind_t get_uintptr_kind(void)
1285 if (machine_size <= 32)
1286 return ATOMIC_TYPE_UINT;
1287 else if (machine_size <= 64)
1288 return ATOMIC_TYPE_ULONG;
1290 return ATOMIC_TYPE_ULONGLONG;
1294 * Find the atomic type kind representing a given size (signed).
1296 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1297 static atomic_type_kind_t kinds[32];
1300 atomic_type_kind_t kind = kinds[size];
1301 if (kind == ATOMIC_TYPE_INVALID) {
1302 static const atomic_type_kind_t possible_kinds[] = {
1307 ATOMIC_TYPE_LONGLONG
1309 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1310 if (get_atomic_type_size(possible_kinds[i]) == size) {
1311 kind = possible_kinds[i];
1321 * Find the atomic type kind representing a given size (signed).
1323 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1324 static atomic_type_kind_t kinds[32];
1327 atomic_type_kind_t kind = kinds[size];
1328 if (kind == ATOMIC_TYPE_INVALID) {
1329 static const atomic_type_kind_t possible_kinds[] = {
1334 ATOMIC_TYPE_ULONGLONG
1336 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1337 if (get_atomic_type_size(possible_kinds[i]) == size) {
1338 kind = possible_kinds[i];
1348 * Hash the given type and return the "singleton" version
1351 static type_t *identify_new_type(type_t *type)
1353 type_t *result = typehash_insert(type);
1354 if (result != type) {
1355 obstack_free(type_obst, type);
1361 * Creates a new atomic type.
1363 * @param akind The kind of the atomic type.
1364 * @param qualifiers Type qualifiers for the new type.
1366 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1368 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1369 memset(type, 0, sizeof(atomic_type_t));
1371 type->kind = TYPE_ATOMIC;
1372 type->base.size = get_atomic_type_size(akind);
1373 type->base.alignment = get_atomic_type_alignment(akind);
1374 type->base.qualifiers = qualifiers;
1375 type->atomic.akind = akind;
1377 return identify_new_type(type);
1381 * Creates a new complex type.
1383 * @param akind The kind of the atomic type.
1384 * @param qualifiers Type qualifiers for the new type.
1386 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1388 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1389 memset(type, 0, sizeof(complex_type_t));
1391 type->kind = TYPE_COMPLEX;
1392 type->base.qualifiers = qualifiers;
1393 type->base.alignment = get_atomic_type_alignment(akind);
1394 type->complex.akind = akind;
1396 return identify_new_type(type);
1400 * Creates a new imaginary type.
1402 * @param akind The kind of the atomic type.
1403 * @param qualifiers Type qualifiers for the new type.
1405 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1407 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1408 memset(type, 0, sizeof(imaginary_type_t));
1410 type->kind = TYPE_IMAGINARY;
1411 type->base.qualifiers = qualifiers;
1412 type->base.alignment = get_atomic_type_alignment(akind);
1413 type->imaginary.akind = akind;
1415 return identify_new_type(type);
1419 * Creates a new pointer type.
1421 * @param points_to The points-to type for the new type.
1422 * @param qualifiers Type qualifiers for the new type.
1424 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1426 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1427 memset(type, 0, sizeof(pointer_type_t));
1429 type->kind = TYPE_POINTER;
1430 type->base.qualifiers = qualifiers;
1431 type->base.alignment = 0;
1432 type->pointer.points_to = points_to;
1434 return identify_new_type(type);
1437 type_t *make_array_type(type_t *element_type, size_t size,
1438 type_qualifiers_t qualifiers)
1440 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1441 memset(type, 0, sizeof(array_type_t));
1443 type->kind = TYPE_ARRAY;
1444 type->base.qualifiers = qualifiers;
1445 type->base.alignment = 0;
1446 type->array.element_type = element_type;
1447 type->array.size = size;
1448 type->array.size_constant = true;
1450 return identify_new_type(type);
1454 * Debug helper. Prints the given type to stdout.
1456 static __attribute__((unused))
1457 void dbg_type(const type_t *type)
1459 FILE *old_out = out;