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);
215 * Prints the name of an atomic type kinds.
217 * @param kind The type kind.
220 void print_atomic_kinds(atomic_type_kind_t kind)
222 const char *s = "INVALIDATOMIC";
224 case ATOMIC_TYPE_INVALID: break;
225 case ATOMIC_TYPE_VOID: s = "void"; break;
226 case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
227 case ATOMIC_TYPE_CHAR: s = "char"; break;
228 case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
229 case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
230 case ATOMIC_TYPE_INT: s = "int"; break;
231 case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
232 case ATOMIC_TYPE_SHORT: s = "short"; break;
233 case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
234 case ATOMIC_TYPE_LONG: s = "long"; break;
235 case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
236 case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
237 case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
238 case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break;
239 case ATOMIC_TYPE_FLOAT: s = "float"; break;
240 case ATOMIC_TYPE_DOUBLE: s = "double"; break;
246 * Prints the name of an atomic type.
248 * @param type The type.
251 void print_atomic_type(const atomic_type_t *type)
253 print_type_qualifiers(type->base.qualifiers);
254 if (type->base.qualifiers != 0)
256 print_atomic_kinds(type->akind);
260 * Prints the name of a complex type.
262 * @param type The type.
265 void print_complex_type(const complex_type_t *type)
267 int empty = type->base.qualifiers == 0;
268 print_type_qualifiers(type->base.qualifiers);
269 fputs(" _Complex " + empty, out);
270 print_atomic_kinds(type->akind);
274 * Prints the name of an imaginary type.
276 * @param type The type.
279 void print_imaginary_type(const imaginary_type_t *type)
281 int empty = type->base.qualifiers == 0;
282 print_type_qualifiers(type->base.qualifiers);
283 fputs(" _Imaginary " + empty, out);
284 print_atomic_kinds(type->akind);
288 * Print the first part (the prefix) of a type.
290 * @param type The type to print.
291 * @param top true, if this is the top type, false if it's an embedded type.
293 static void print_function_type_pre(const function_type_t *type, bool top)
295 print_type_qualifiers(type->base.qualifiers);
296 if (type->base.qualifiers != 0)
300 intern_print_type_pre(type->return_type, false);
302 switch (type->calling_convention) {
304 fputs("__cdecl ", out);
307 fputs("__stdcall ", out);
310 fputs("__fastcall ", out);
313 fputs("__thiscall ", out);
319 /* don't emit parenthesis if we're the toplevel type... */
325 * Print the second part (the postfix) of a type.
327 * @param type The type to print.
328 * @param top true, if this is the top type, false if it's an embedded type.
330 static void print_function_type_post(const function_type_t *type,
331 const scope_t *parameters, bool top)
333 /* don't emit parenthesis if we're the toplevel type... */
339 if (parameters == NULL) {
340 function_parameter_t *parameter = type->parameters;
341 for( ; parameter != NULL; parameter = parameter->next) {
347 print_type(parameter->type);
350 entity_t *parameter = parameters->entities;
351 for( ; parameter != NULL; parameter = parameter->base.next) {
357 assert(is_declaration(parameter));
358 print_type_ext(parameter->declaration.type, parameter->base.symbol,
362 if (type->variadic) {
370 if (first && !type->unspecified_parameters) {
375 intern_print_type_post(type->return_type, false);
379 * Prints the prefix part of a pointer type.
381 * @param type The pointer type.
383 static void print_pointer_type_pre(const pointer_type_t *type)
385 intern_print_type_pre(type->points_to, false);
387 print_type_qualifiers(type->base.qualifiers);
388 if (type->base.qualifiers != 0)
393 * Prints the postfix part of a pointer type.
395 * @param type The pointer type.
397 static void print_pointer_type_post(const pointer_type_t *type)
399 intern_print_type_post(type->points_to, false);
403 * Prints the prefix part of an array type.
405 * @param type The array type.
407 static void print_array_type_pre(const array_type_t *type)
409 intern_print_type_pre(type->element_type, false);
413 * Prints the postfix part of an array type.
415 * @param type The array type.
417 static void print_array_type_post(const array_type_t *type)
420 if (type->is_static) {
421 fputs("static ", out);
423 print_type_qualifiers(type->base.qualifiers);
424 if (type->base.qualifiers != 0)
426 if (type->size_expression != NULL
427 && (print_implicit_array_size || !type->has_implicit_size)) {
428 print_expression(type->size_expression);
431 intern_print_type_post(type->element_type, false);
435 * Prints the postfix part of a bitfield type.
437 * @param type The array type.
439 static void print_bitfield_type_post(const bitfield_type_t *type)
442 print_expression(type->size_expression);
443 intern_print_type_post(type->base_type, false);
447 * Prints an enum definition.
449 * @param declaration The enum's type declaration.
451 void print_enum_definition(const enum_t *enume)
457 entity_t *entry = enume->base.next;
458 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
459 entry = entry->base.next) {
462 fprintf(out, "%s", entry->base.symbol->string);
463 if (entry->enum_value.value != NULL) {
466 /* skip the implicit cast */
467 expression_t *expression = entry->enum_value.value;
468 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
469 expression = expression->unary.value;
471 print_expression(expression);
482 * Prints an enum type.
484 * @param type The enum type.
486 static void print_type_enum(const enum_type_t *type)
488 int empty = type->base.qualifiers == 0;
489 print_type_qualifiers(type->base.qualifiers);
490 fputs(" enum " + empty, out);
492 enum_t *enume = type->enume;
493 symbol_t *symbol = enume->base.symbol;
494 if (symbol != NULL) {
495 fputs(symbol->string, out);
497 print_enum_definition(enume);
502 * Print the compound part of a compound type.
504 void print_compound_definition(const compound_t *compound)
509 entity_t *entity = compound->members.entities;
510 for( ; entity != NULL; entity = entity->base.next) {
511 if (entity->kind != ENTITY_COMPOUND_MEMBER)
515 print_entity(entity);
525 * Prints a compound type.
527 * @param type The compound type.
529 static void print_compound_type(const compound_type_t *type)
531 int empty = type->base.qualifiers == 0;
532 print_type_qualifiers(type->base.qualifiers);
534 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
535 fputs(" struct " + empty, out);
537 assert(type->base.kind == TYPE_COMPOUND_UNION);
538 fputs(" union " + empty, out);
541 compound_t *compound = type->compound;
542 symbol_t *symbol = compound->base.symbol;
543 if (symbol != NULL) {
544 fputs(symbol->string, out);
546 print_compound_definition(compound);
551 * Prints the prefix part of a typedef type.
553 * @param type The typedef type.
555 static void print_typedef_type_pre(const typedef_type_t *const type)
557 print_type_qualifiers(type->base.qualifiers);
558 if (type->base.qualifiers != 0)
560 fputs(type->typedefe->base.symbol->string, out);
564 * Prints the prefix part of a typeof type.
566 * @param type The typeof type.
568 static void print_typeof_type_pre(const typeof_type_t *const type)
570 fputs("typeof(", out);
571 if (type->expression != NULL) {
572 assert(type->typeof_type == NULL);
573 print_expression(type->expression);
575 print_type(type->typeof_type);
581 * Prints the prefix part of a type.
583 * @param type The type.
584 * @param top true if we print the toplevel type, false else.
586 static void intern_print_type_pre(const type_t *const type, const bool top)
590 fputs("<error>", out);
593 fputs("<invalid>", out);
596 print_type_enum(&type->enumt);
599 print_atomic_type(&type->atomic);
602 print_complex_type(&type->complex);
605 print_imaginary_type(&type->imaginary);
607 case TYPE_COMPOUND_STRUCT:
608 case TYPE_COMPOUND_UNION:
609 print_compound_type(&type->compound);
612 fputs(type->builtin.symbol->string, out);
615 print_function_type_pre(&type->function, top);
618 print_pointer_type_pre(&type->pointer);
621 intern_print_type_pre(type->bitfield.base_type, top);
624 print_array_type_pre(&type->array);
627 print_typedef_type_pre(&type->typedeft);
630 print_typeof_type_pre(&type->typeoft);
633 fputs("unknown", out);
637 * Prints the postfix part of a type.
639 * @param type The type.
640 * @param top true if we print the toplevel type, false else.
642 static void intern_print_type_post(const type_t *const type, const bool top)
646 print_function_type_post(&type->function, NULL, top);
649 print_pointer_type_post(&type->pointer);
652 print_array_type_post(&type->array);
655 print_bitfield_type_post(&type->bitfield);
663 case TYPE_COMPOUND_STRUCT:
664 case TYPE_COMPOUND_UNION:
675 * @param type The type.
677 void print_type(const type_t *const type)
679 print_type_ext(type, NULL, NULL);
682 void print_type_ext(const type_t *const type, const symbol_t *symbol,
683 const scope_t *parameters)
686 fputs("nil type", out);
690 intern_print_type_pre(type, true);
691 if (symbol != NULL) {
693 fputs(symbol->string, out);
695 if (type->kind == TYPE_FUNCTION) {
696 print_function_type_post(&type->function, parameters, true);
698 intern_print_type_post(type, true);
703 * Return the size of a type AST node.
705 * @param type The type.
707 static size_t get_type_size(const type_t *type)
710 case TYPE_ATOMIC: return sizeof(atomic_type_t);
711 case TYPE_COMPLEX: return sizeof(complex_type_t);
712 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
713 case TYPE_COMPOUND_STRUCT:
714 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
715 case TYPE_ENUM: return sizeof(enum_type_t);
716 case TYPE_FUNCTION: return sizeof(function_type_t);
717 case TYPE_POINTER: return sizeof(pointer_type_t);
718 case TYPE_ARRAY: return sizeof(array_type_t);
719 case TYPE_BUILTIN: return sizeof(builtin_type_t);
720 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
721 case TYPE_TYPEOF: return sizeof(typeof_type_t);
722 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
723 case TYPE_ERROR: panic("error type found");
724 case TYPE_INVALID: panic("invalid type found");
726 panic("unknown type found");
732 * @param type The type to copy.
733 * @return A copy of the type.
735 * @note This does not produce a deep copy!
737 type_t *duplicate_type(const type_t *type)
739 size_t size = get_type_size(type);
741 type_t *copy = obstack_alloc(type_obst, size);
742 memcpy(copy, type, size);
748 * Returns the unqualified type of a given type.
750 * @param type The type.
751 * @returns The unqualified type.
753 type_t *get_unqualified_type(type_t *type)
755 assert(!is_typeref(type));
757 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
760 type_t *unqualified_type = duplicate_type(type);
761 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
763 type_t *result = typehash_insert(unqualified_type);
764 if (result != unqualified_type) {
765 obstack_free(type_obst, unqualified_type);
771 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
773 type_t *type = skip_typeref(orig_type);
776 if (is_type_array(type)) {
777 /* For array types the element type has to be adjusted */
778 type_t *element_type = type->array.element_type;
779 type_t *qual_element_type = get_qualified_type(element_type, qual);
781 if (qual_element_type == element_type)
784 copy = duplicate_type(type);
785 copy->array.element_type = qual_element_type;
786 } else if (is_type_valid(type)) {
787 if ((type->base.qualifiers & qual) == qual)
790 copy = duplicate_type(type);
791 copy->base.qualifiers |= qual;
796 type = typehash_insert(copy);
798 obstack_free(type_obst, copy);
804 * Check if a type is valid.
806 * @param type The type to check.
807 * @return true if type represents a valid type.
809 bool type_valid(const type_t *type)
811 return type->kind != TYPE_INVALID;
814 static bool test_atomic_type_flag(atomic_type_kind_t kind,
815 atomic_type_flag_t flag)
817 assert(kind <= ATOMIC_TYPE_LAST);
818 return (atomic_type_properties[kind].flags & flag) != 0;
822 * Returns true if the given type is an integer type.
824 * @param type The type to check.
825 * @return True if type is an integer type.
827 bool is_type_integer(const type_t *type)
829 assert(!is_typeref(type));
831 if (type->kind == TYPE_ENUM)
833 if (type->kind == TYPE_BITFIELD)
836 if (type->kind != TYPE_ATOMIC)
839 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
843 * Returns true if the given type is an enum type.
845 * @param type The type to check.
846 * @return True if type is an enum type.
848 bool is_type_enum(const type_t *type)
850 assert(!is_typeref(type));
851 return type->kind == TYPE_ENUM;
855 * Returns true if the given type is an floating point type.
857 * @param type The type to check.
858 * @return True if type is a floating point type.
860 bool is_type_float(const type_t *type)
862 assert(!is_typeref(type));
864 if (type->kind != TYPE_ATOMIC)
867 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
871 * Returns true if the given type is an complex type.
873 * @param type The type to check.
874 * @return True if type is a complex type.
876 bool is_type_complex(const type_t *type)
878 assert(!is_typeref(type));
880 if (type->kind != TYPE_ATOMIC)
883 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
887 * Returns true if the given type is a signed type.
889 * @param type The type to check.
890 * @return True if type is a signed type.
892 bool is_type_signed(const type_t *type)
894 assert(!is_typeref(type));
896 /* enum types are int for now */
897 if (type->kind == TYPE_ENUM)
899 if (type->kind == TYPE_BITFIELD)
900 return is_type_signed(type->bitfield.base_type);
902 if (type->kind != TYPE_ATOMIC)
905 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
909 * Returns true if the given type represents an arithmetic type.
911 * @param type The type to check.
912 * @return True if type represents an arithmetic type.
914 bool is_type_arithmetic(const type_t *type)
916 assert(!is_typeref(type));
923 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
925 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
927 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
934 * Returns true if the given type is an integer or float type.
936 * @param type The type to check.
937 * @return True if type is an integer or float type.
939 bool is_type_real(const type_t *type)
942 return is_type_integer(type) || is_type_float(type);
946 * Returns true if the given type represents a scalar type.
948 * @param type The type to check.
949 * @return True if type represents a scalar type.
951 bool is_type_scalar(const type_t *type)
953 assert(!is_typeref(type));
955 switch (type->kind) {
956 case TYPE_POINTER: return true;
957 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
961 return is_type_arithmetic(type);
965 * Check if a given type is incomplete.
967 * @param type The type to check.
968 * @return True if the given type is incomplete (ie. just forward).
970 bool is_type_incomplete(const type_t *type)
972 assert(!is_typeref(type));
975 case TYPE_COMPOUND_STRUCT:
976 case TYPE_COMPOUND_UNION: {
977 const compound_type_t *compound_type = &type->compound;
978 return !compound_type->compound->complete;
984 return type->array.size_expression == NULL
985 && !type->array.size_constant;
988 return type->atomic.akind == ATOMIC_TYPE_VOID;
991 return type->complex.akind == ATOMIC_TYPE_VOID;
994 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1005 panic("is_type_incomplete called without typerefs skipped");
1010 panic("invalid type found");
1013 bool is_type_object(const type_t *type)
1015 return !is_type_function(type) && !is_type_incomplete(type);
1019 * Check if two function types are compatible.
1021 static bool function_types_compatible(const function_type_t *func1,
1022 const function_type_t *func2)
1024 const type_t* const ret1 = skip_typeref(func1->return_type);
1025 const type_t* const ret2 = skip_typeref(func2->return_type);
1026 if (!types_compatible(ret1, ret2))
1029 if (func1->calling_convention != func2->calling_convention)
1032 /* can parameters be compared? */
1033 if (func1->unspecified_parameters || func2->unspecified_parameters)
1036 if (func1->variadic != func2->variadic)
1039 /* TODO: handling of unspecified parameters not correct yet */
1041 /* all argument types must be compatible */
1042 function_parameter_t *parameter1 = func1->parameters;
1043 function_parameter_t *parameter2 = func2->parameters;
1044 for ( ; parameter1 != NULL && parameter2 != NULL;
1045 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1046 type_t *parameter1_type = skip_typeref(parameter1->type);
1047 type_t *parameter2_type = skip_typeref(parameter2->type);
1049 parameter1_type = get_unqualified_type(parameter1_type);
1050 parameter2_type = get_unqualified_type(parameter2_type);
1052 if (!types_compatible(parameter1_type, parameter2_type))
1055 /* same number of arguments? */
1056 if (parameter1 != NULL || parameter2 != NULL)
1063 * Check if two array types are compatible.
1065 static bool array_types_compatible(const array_type_t *array1,
1066 const array_type_t *array2)
1068 type_t *element_type1 = skip_typeref(array1->element_type);
1069 type_t *element_type2 = skip_typeref(array2->element_type);
1070 if (!types_compatible(element_type1, element_type2))
1073 if (!array1->size_constant || !array2->size_constant)
1076 return array1->size == array2->size;
1080 * Check if two types are compatible.
1082 bool types_compatible(const type_t *type1, const type_t *type2)
1084 assert(!is_typeref(type1));
1085 assert(!is_typeref(type2));
1087 /* shortcut: the same type is always compatible */
1091 if (!is_type_valid(type1) || !is_type_valid(type2))
1094 if (type1->base.qualifiers != type2->base.qualifiers)
1096 if (type1->kind != type2->kind)
1099 switch (type1->kind) {
1101 return function_types_compatible(&type1->function, &type2->function);
1103 return type1->atomic.akind == type2->atomic.akind;
1105 return type1->complex.akind == type2->complex.akind;
1106 case TYPE_IMAGINARY:
1107 return type1->imaginary.akind == type2->imaginary.akind;
1109 return array_types_compatible(&type1->array, &type2->array);
1111 case TYPE_POINTER: {
1112 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1113 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1114 return types_compatible(to1, to2);
1117 case TYPE_COMPOUND_STRUCT:
1118 case TYPE_COMPOUND_UNION:
1121 /* TODO: not implemented */
1125 /* not sure if this makes sense or is even needed, implement it if you
1126 * really need it! */
1127 panic("type compatibility check for bitfield type");
1130 /* Hmm, the error type should be compatible to all other types */
1133 panic("invalid type found in compatible types");
1136 panic("typerefs not skipped in compatible types?!?");
1139 /* TODO: incomplete */
1144 * Skip all typerefs and return the underlying type.
1146 type_t *skip_typeref(type_t *type)
1148 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1149 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1152 switch (type->kind) {
1155 case TYPE_TYPEDEF: {
1156 qualifiers |= type->base.qualifiers;
1157 modifiers |= type->base.modifiers;
1158 const typedef_type_t *typedef_type = &type->typedeft;
1159 if (typedef_type->resolved_type != NULL) {
1160 type = typedef_type->resolved_type;
1163 type = typedef_type->typedefe->type;
1167 const typeof_type_t *typeof_type = &type->typeoft;
1168 if (typeof_type->typeof_type != NULL) {
1169 type = typeof_type->typeof_type;
1171 type = typeof_type->expression->base.type;
1181 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1182 type_t *const copy = duplicate_type(type);
1184 /* for const with typedefed array type the element type has to be
1186 if (is_type_array(copy)) {
1187 type_t *element_type = copy->array.element_type;
1188 element_type = duplicate_type(element_type);
1189 element_type->base.qualifiers |= qualifiers;
1190 element_type->base.modifiers |= modifiers;
1191 copy->array.element_type = element_type;
1193 copy->base.qualifiers |= qualifiers;
1194 copy->base.modifiers |= modifiers;
1197 type = typehash_insert(copy);
1199 obstack_free(type_obst, copy);
1206 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1207 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1210 switch (type->base.kind) {
1212 return TYPE_QUALIFIER_NONE;
1214 qualifiers |= type->base.qualifiers;
1215 const typedef_type_t *typedef_type = &type->typedeft;
1216 if (typedef_type->resolved_type != NULL)
1217 type = typedef_type->resolved_type;
1219 type = typedef_type->typedefe->type;
1222 const typeof_type_t *typeof_type = &type->typeoft;
1223 if (typeof_type->typeof_type != NULL) {
1224 type = typeof_type->typeof_type;
1226 type = typeof_type->expression->base.type;
1231 if (skip_array_type) {
1232 type = type->array.element_type;
1241 return type->base.qualifiers | qualifiers;
1244 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1246 assert(kind <= ATOMIC_TYPE_LAST);
1247 return atomic_type_properties[kind].size;
1250 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1252 assert(kind <= ATOMIC_TYPE_LAST);
1253 return atomic_type_properties[kind].alignment;
1256 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1258 assert(kind <= ATOMIC_TYPE_LAST);
1259 return atomic_type_properties[kind].flags;
1262 atomic_type_kind_t get_intptr_kind(void)
1264 if (machine_size <= 32)
1265 return ATOMIC_TYPE_INT;
1266 else if (machine_size <= 64)
1267 return ATOMIC_TYPE_LONG;
1269 return ATOMIC_TYPE_LONGLONG;
1272 atomic_type_kind_t get_uintptr_kind(void)
1274 if (machine_size <= 32)
1275 return ATOMIC_TYPE_UINT;
1276 else if (machine_size <= 64)
1277 return ATOMIC_TYPE_ULONG;
1279 return ATOMIC_TYPE_ULONGLONG;
1283 * Find the atomic type kind representing a given size (signed).
1285 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1286 static atomic_type_kind_t kinds[32];
1289 atomic_type_kind_t kind = kinds[size];
1290 if (kind == ATOMIC_TYPE_INVALID) {
1291 static const atomic_type_kind_t possible_kinds[] = {
1296 ATOMIC_TYPE_LONGLONG
1298 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1299 if (get_atomic_type_size(possible_kinds[i]) == size) {
1300 kind = possible_kinds[i];
1310 * Find the atomic type kind representing a given size (signed).
1312 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1313 static atomic_type_kind_t kinds[32];
1316 atomic_type_kind_t kind = kinds[size];
1317 if (kind == ATOMIC_TYPE_INVALID) {
1318 static const atomic_type_kind_t possible_kinds[] = {
1323 ATOMIC_TYPE_ULONGLONG
1325 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1326 if (get_atomic_type_size(possible_kinds[i]) == size) {
1327 kind = possible_kinds[i];
1337 * Hash the given type and return the "singleton" version
1340 static type_t *identify_new_type(type_t *type)
1342 type_t *result = typehash_insert(type);
1343 if (result != type) {
1344 obstack_free(type_obst, type);
1350 * Creates a new atomic type.
1352 * @param akind The kind of the atomic type.
1353 * @param qualifiers Type qualifiers for the new type.
1355 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1357 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1358 memset(type, 0, sizeof(atomic_type_t));
1360 type->kind = TYPE_ATOMIC;
1361 type->base.size = get_atomic_type_size(akind);
1362 type->base.alignment = get_atomic_type_alignment(akind);
1363 type->base.qualifiers = qualifiers;
1364 type->atomic.akind = akind;
1366 return identify_new_type(type);
1370 * Creates a new complex type.
1372 * @param akind The kind of the atomic type.
1373 * @param qualifiers Type qualifiers for the new type.
1375 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1377 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1378 memset(type, 0, sizeof(complex_type_t));
1380 type->kind = TYPE_COMPLEX;
1381 type->base.qualifiers = qualifiers;
1382 type->base.alignment = get_atomic_type_alignment(akind);
1383 type->complex.akind = akind;
1385 return identify_new_type(type);
1389 * Creates a new imaginary type.
1391 * @param akind The kind of the atomic type.
1392 * @param qualifiers Type qualifiers for the new type.
1394 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1396 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1397 memset(type, 0, sizeof(imaginary_type_t));
1399 type->kind = TYPE_IMAGINARY;
1400 type->base.qualifiers = qualifiers;
1401 type->base.alignment = get_atomic_type_alignment(akind);
1402 type->imaginary.akind = akind;
1404 return identify_new_type(type);
1408 * Creates a new pointer type.
1410 * @param points_to The points-to type for the new type.
1411 * @param qualifiers Type qualifiers for the new type.
1413 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1415 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1416 memset(type, 0, sizeof(pointer_type_t));
1418 type->kind = TYPE_POINTER;
1419 type->base.qualifiers = qualifiers;
1420 type->base.alignment = 0;
1421 type->pointer.points_to = points_to;
1423 return identify_new_type(type);
1426 type_t *make_array_type(type_t *element_type, size_t size,
1427 type_qualifiers_t qualifiers)
1429 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1430 memset(type, 0, sizeof(array_type_t));
1432 type->kind = TYPE_ARRAY;
1433 type->base.qualifiers = qualifiers;
1434 type->base.alignment = 0;
1435 type->array.element_type = element_type;
1436 type->array.size = size;
1437 type->array.size_constant = true;
1439 return identify_new_type(type);
1443 * Debug helper. Prints the given type to stdout.
1445 static __attribute__((unused))
1446 void dbg_type(const type_t *type)
1448 FILE *old_out = out;