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);
310 switch (type->calling_convention) {
311 case CC_CDECL: fputs("__cdecl ", out); break;
312 case CC_STDCALL: fputs("__stdcall ", out); break;
313 case CC_FASTCALL: fputs("__fastcall ", out); break;
314 case CC_THISCALL: fputs("__thiscall ", out); break;
315 case CC_DEFAULT: break;
318 /* don't emit parenthesis if we're the toplevel type... */
324 * Print the second part (the postfix) of a type.
326 * @param type The type to print.
327 * @param top true, if this is the top type, false if it's an embedded type.
329 static void print_function_type_post(const function_type_t *type,
330 const scope_t *parameters, bool top)
332 /* don't emit parenthesis if we're the toplevel type... */
338 if (parameters == NULL) {
339 function_parameter_t *parameter = type->parameters;
340 for( ; parameter != NULL; parameter = parameter->next) {
346 print_type(parameter->type);
349 entity_t *parameter = parameters->entities;
350 for( ; parameter != NULL; parameter = parameter->base.next) {
356 assert(is_declaration(parameter));
357 print_type_ext(parameter->declaration.type, parameter->base.symbol,
361 if (type->variadic) {
369 if (first && !type->unspecified_parameters) {
374 intern_print_type_post(type->return_type, false);
378 * Prints the prefix part of a pointer type.
380 * @param type The pointer type.
382 static void print_pointer_type_pre(const pointer_type_t *type)
384 intern_print_type_pre(type->points_to, false);
386 print_type_qualifiers(type->base.qualifiers);
387 if (type->base.qualifiers != 0)
392 * Prints the postfix part of a pointer type.
394 * @param type The pointer type.
396 static void print_pointer_type_post(const pointer_type_t *type)
398 intern_print_type_post(type->points_to, false);
402 * Prints the prefix part of an array type.
404 * @param type The array type.
406 static void print_array_type_pre(const array_type_t *type)
408 intern_print_type_pre(type->element_type, false);
412 * Prints the postfix part of an array type.
414 * @param type The array type.
416 static void print_array_type_post(const array_type_t *type)
419 if (type->is_static) {
420 fputs("static ", out);
422 print_type_qualifiers(type->base.qualifiers);
423 if (type->base.qualifiers != 0)
425 if (type->size_expression != NULL
426 && (print_implicit_array_size || !type->has_implicit_size)) {
427 print_expression(type->size_expression);
430 intern_print_type_post(type->element_type, false);
434 * Prints the postfix part of a bitfield type.
436 * @param type The array type.
438 static void print_bitfield_type_post(const bitfield_type_t *type)
441 print_expression(type->size_expression);
442 intern_print_type_post(type->base_type, false);
446 * Prints an enum definition.
448 * @param declaration The enum's type declaration.
450 void print_enum_definition(const enum_t *enume)
456 entity_t *entry = enume->base.next;
457 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
458 entry = entry->base.next) {
461 fprintf(out, "%s", entry->base.symbol->string);
462 if (entry->enum_value.value != NULL) {
465 /* skip the implicit cast */
466 expression_t *expression = entry->enum_value.value;
467 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
468 expression = expression->unary.value;
470 print_expression(expression);
481 * Prints an enum type.
483 * @param type The enum type.
485 static void print_type_enum(const enum_type_t *type)
487 int empty = type->base.qualifiers == 0;
488 print_type_qualifiers(type->base.qualifiers);
489 fputs(" enum " + empty, out);
491 enum_t *enume = type->enume;
492 symbol_t *symbol = enume->base.symbol;
493 if (symbol != NULL) {
494 fputs(symbol->string, out);
496 print_enum_definition(enume);
501 * Print the compound part of a compound type.
503 void print_compound_definition(const compound_t *compound)
508 entity_t *entity = compound->members.entities;
509 for( ; entity != NULL; entity = entity->base.next) {
510 if (entity->kind != ENTITY_COMPOUND_MEMBER)
514 print_entity(entity);
524 * Prints a compound type.
526 * @param type The compound type.
528 static void print_compound_type(const compound_type_t *type)
530 int empty = type->base.qualifiers == 0;
531 print_type_qualifiers(type->base.qualifiers);
533 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
534 fputs(" struct " + empty, out);
536 assert(type->base.kind == TYPE_COMPOUND_UNION);
537 fputs(" union " + empty, out);
540 compound_t *compound = type->compound;
541 symbol_t *symbol = compound->base.symbol;
542 if (symbol != NULL) {
543 fputs(symbol->string, out);
545 print_compound_definition(compound);
550 * Prints the prefix part of a typedef type.
552 * @param type The typedef type.
554 static void print_typedef_type_pre(const typedef_type_t *const type)
556 print_type_qualifiers(type->base.qualifiers);
557 if (type->base.qualifiers != 0)
559 fputs(type->typedefe->base.symbol->string, out);
563 * Prints the prefix part of a typeof type.
565 * @param type The typeof type.
567 static void print_typeof_type_pre(const typeof_type_t *const type)
569 fputs("typeof(", out);
570 if (type->expression != NULL) {
571 assert(type->typeof_type == NULL);
572 print_expression(type->expression);
574 print_type(type->typeof_type);
580 * Prints the prefix part of a type.
582 * @param type The type.
583 * @param top true if we print the toplevel type, false else.
585 static void intern_print_type_pre(const type_t *const type, const bool top)
589 fputs("<error>", out);
592 fputs("<invalid>", out);
595 print_type_enum(&type->enumt);
598 print_atomic_type(&type->atomic);
601 print_complex_type(&type->complex);
604 print_imaginary_type(&type->imaginary);
606 case TYPE_COMPOUND_STRUCT:
607 case TYPE_COMPOUND_UNION:
608 print_compound_type(&type->compound);
611 fputs(type->builtin.symbol->string, out);
614 print_function_type_pre(&type->function, top);
617 print_pointer_type_pre(&type->pointer);
620 intern_print_type_pre(type->bitfield.base_type, top);
623 print_array_type_pre(&type->array);
626 print_typedef_type_pre(&type->typedeft);
629 print_typeof_type_pre(&type->typeoft);
632 fputs("unknown", out);
636 * Prints the postfix part of a type.
638 * @param type The type.
639 * @param top true if we print the toplevel type, false else.
641 static void intern_print_type_post(const type_t *const type, const bool top)
645 print_function_type_post(&type->function, NULL, top);
648 print_pointer_type_post(&type->pointer);
651 print_array_type_post(&type->array);
654 print_bitfield_type_post(&type->bitfield);
662 case TYPE_COMPOUND_STRUCT:
663 case TYPE_COMPOUND_UNION:
674 * @param type The type.
676 void print_type(const type_t *const type)
678 print_type_ext(type, NULL, NULL);
681 void print_type_ext(const type_t *const type, const symbol_t *symbol,
682 const scope_t *parameters)
685 fputs("nil type", out);
689 intern_print_type_pre(type, true);
690 if (symbol != NULL) {
692 fputs(symbol->string, out);
694 if (type->kind == TYPE_FUNCTION) {
695 print_function_type_post(&type->function, parameters, true);
697 intern_print_type_post(type, true);
702 * Return the size of a type AST node.
704 * @param type The type.
706 static size_t get_type_size(const type_t *type)
709 case TYPE_ATOMIC: return sizeof(atomic_type_t);
710 case TYPE_COMPLEX: return sizeof(complex_type_t);
711 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
712 case TYPE_COMPOUND_STRUCT:
713 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
714 case TYPE_ENUM: return sizeof(enum_type_t);
715 case TYPE_FUNCTION: return sizeof(function_type_t);
716 case TYPE_POINTER: return sizeof(pointer_type_t);
717 case TYPE_ARRAY: return sizeof(array_type_t);
718 case TYPE_BUILTIN: return sizeof(builtin_type_t);
719 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
720 case TYPE_TYPEOF: return sizeof(typeof_type_t);
721 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
722 case TYPE_ERROR: panic("error type found");
723 case TYPE_INVALID: panic("invalid type found");
725 panic("unknown type found");
731 * @param type The type to copy.
732 * @return A copy of the type.
734 * @note This does not produce a deep copy!
736 type_t *duplicate_type(const type_t *type)
738 size_t size = get_type_size(type);
740 type_t *copy = obstack_alloc(type_obst, size);
741 memcpy(copy, type, size);
747 * Returns the unqualified type of a given type.
749 * @param type The type.
750 * @returns The unqualified type.
752 type_t *get_unqualified_type(type_t *type)
754 assert(!is_typeref(type));
756 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
759 type_t *unqualified_type = duplicate_type(type);
760 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
762 type_t *result = typehash_insert(unqualified_type);
763 if (result != unqualified_type) {
764 obstack_free(type_obst, unqualified_type);
770 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
772 type_t *type = skip_typeref(orig_type);
775 if (is_type_array(type)) {
776 /* For array types the element type has to be adjusted */
777 type_t *element_type = type->array.element_type;
778 type_t *qual_element_type = get_qualified_type(element_type, qual);
780 if (qual_element_type == element_type)
783 copy = duplicate_type(type);
784 copy->array.element_type = qual_element_type;
785 } else if (is_type_valid(type)) {
786 if ((type->base.qualifiers & qual) == qual)
789 copy = duplicate_type(type);
790 copy->base.qualifiers |= qual;
795 type = typehash_insert(copy);
797 obstack_free(type_obst, copy);
803 * Check if a type is valid.
805 * @param type The type to check.
806 * @return true if type represents a valid type.
808 bool type_valid(const type_t *type)
810 return type->kind != TYPE_INVALID;
813 static bool test_atomic_type_flag(atomic_type_kind_t kind,
814 atomic_type_flag_t flag)
816 assert(kind <= ATOMIC_TYPE_LAST);
817 return (atomic_type_properties[kind].flags & flag) != 0;
821 * Returns true if the given type is an integer type.
823 * @param type The type to check.
824 * @return True if type is an integer type.
826 bool is_type_integer(const type_t *type)
828 assert(!is_typeref(type));
830 if (type->kind == TYPE_ENUM)
832 if (type->kind == TYPE_BITFIELD)
835 if (type->kind != TYPE_ATOMIC)
838 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
842 * Returns true if the given type is an enum type.
844 * @param type The type to check.
845 * @return True if type is an enum type.
847 bool is_type_enum(const type_t *type)
849 assert(!is_typeref(type));
850 return type->kind == TYPE_ENUM;
854 * Returns true if the given type is an floating point type.
856 * @param type The type to check.
857 * @return True if type is a floating point type.
859 bool is_type_float(const type_t *type)
861 assert(!is_typeref(type));
863 if (type->kind != TYPE_ATOMIC)
866 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
870 * Returns true if the given type is an complex type.
872 * @param type The type to check.
873 * @return True if type is a complex type.
875 bool is_type_complex(const type_t *type)
877 assert(!is_typeref(type));
879 if (type->kind != TYPE_ATOMIC)
882 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
886 * Returns true if the given type is a signed type.
888 * @param type The type to check.
889 * @return True if type is a signed type.
891 bool is_type_signed(const type_t *type)
893 assert(!is_typeref(type));
895 /* enum types are int for now */
896 if (type->kind == TYPE_ENUM)
898 if (type->kind == TYPE_BITFIELD)
899 return is_type_signed(type->bitfield.base_type);
901 if (type->kind != TYPE_ATOMIC)
904 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
908 * Returns true if the given type represents an arithmetic type.
910 * @param type The type to check.
911 * @return True if type represents an arithmetic type.
913 bool is_type_arithmetic(const type_t *type)
915 assert(!is_typeref(type));
922 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
924 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
926 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
933 * Returns true if the given type is an integer or float type.
935 * @param type The type to check.
936 * @return True if type is an integer or float type.
938 bool is_type_real(const type_t *type)
941 return is_type_integer(type) || is_type_float(type);
945 * Returns true if the given type represents a scalar type.
947 * @param type The type to check.
948 * @return True if type represents a scalar type.
950 bool is_type_scalar(const type_t *type)
952 assert(!is_typeref(type));
954 switch (type->kind) {
955 case TYPE_POINTER: return true;
956 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
960 return is_type_arithmetic(type);
964 * Check if a given type is incomplete.
966 * @param type The type to check.
967 * @return True if the given type is incomplete (ie. just forward).
969 bool is_type_incomplete(const type_t *type)
971 assert(!is_typeref(type));
974 case TYPE_COMPOUND_STRUCT:
975 case TYPE_COMPOUND_UNION: {
976 const compound_type_t *compound_type = &type->compound;
977 return !compound_type->compound->complete;
983 return type->array.size_expression == NULL
984 && !type->array.size_constant;
987 return type->atomic.akind == ATOMIC_TYPE_VOID;
990 return type->complex.akind == ATOMIC_TYPE_VOID;
993 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1004 panic("is_type_incomplete called without typerefs skipped");
1009 panic("invalid type found");
1012 bool is_type_object(const type_t *type)
1014 return !is_type_function(type) && !is_type_incomplete(type);
1018 * Check if two function types are compatible.
1020 static bool function_types_compatible(const function_type_t *func1,
1021 const function_type_t *func2)
1023 const type_t* const ret1 = skip_typeref(func1->return_type);
1024 const type_t* const ret2 = skip_typeref(func2->return_type);
1025 if (!types_compatible(ret1, ret2))
1028 if (func1->linkage != func2->linkage)
1031 if (func1->calling_convention != func2->calling_convention)
1034 /* can parameters be compared? */
1035 if (func1->unspecified_parameters || func2->unspecified_parameters)
1038 if (func1->variadic != func2->variadic)
1041 /* TODO: handling of unspecified parameters not correct yet */
1043 /* all argument types must be compatible */
1044 function_parameter_t *parameter1 = func1->parameters;
1045 function_parameter_t *parameter2 = func2->parameters;
1046 for ( ; parameter1 != NULL && parameter2 != NULL;
1047 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1048 type_t *parameter1_type = skip_typeref(parameter1->type);
1049 type_t *parameter2_type = skip_typeref(parameter2->type);
1051 parameter1_type = get_unqualified_type(parameter1_type);
1052 parameter2_type = get_unqualified_type(parameter2_type);
1054 if (!types_compatible(parameter1_type, parameter2_type))
1057 /* same number of arguments? */
1058 if (parameter1 != NULL || parameter2 != NULL)
1065 * Check if two array types are compatible.
1067 static bool array_types_compatible(const array_type_t *array1,
1068 const array_type_t *array2)
1070 type_t *element_type1 = skip_typeref(array1->element_type);
1071 type_t *element_type2 = skip_typeref(array2->element_type);
1072 if (!types_compatible(element_type1, element_type2))
1075 if (!array1->size_constant || !array2->size_constant)
1078 return array1->size == array2->size;
1082 * Check if two types are compatible.
1084 bool types_compatible(const type_t *type1, const type_t *type2)
1086 assert(!is_typeref(type1));
1087 assert(!is_typeref(type2));
1089 /* shortcut: the same type is always compatible */
1093 if (!is_type_valid(type1) || !is_type_valid(type2))
1096 if (type1->base.qualifiers != type2->base.qualifiers)
1098 if (type1->kind != type2->kind)
1101 switch (type1->kind) {
1103 return function_types_compatible(&type1->function, &type2->function);
1105 return type1->atomic.akind == type2->atomic.akind;
1107 return type1->complex.akind == type2->complex.akind;
1108 case TYPE_IMAGINARY:
1109 return type1->imaginary.akind == type2->imaginary.akind;
1111 return array_types_compatible(&type1->array, &type2->array);
1113 case TYPE_POINTER: {
1114 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1115 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1116 return types_compatible(to1, to2);
1119 case TYPE_COMPOUND_STRUCT:
1120 case TYPE_COMPOUND_UNION:
1123 /* TODO: not implemented */
1127 /* not sure if this makes sense or is even needed, implement it if you
1128 * really need it! */
1129 panic("type compatibility check for bitfield type");
1132 /* Hmm, the error type should be compatible to all other types */
1135 panic("invalid type found in compatible types");
1138 panic("typerefs not skipped in compatible types?!?");
1141 /* TODO: incomplete */
1146 * Skip all typerefs and return the underlying type.
1148 type_t *skip_typeref(type_t *type)
1150 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1151 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1154 switch (type->kind) {
1157 case TYPE_TYPEDEF: {
1158 qualifiers |= type->base.qualifiers;
1159 modifiers |= type->base.modifiers;
1160 const typedef_type_t *typedef_type = &type->typedeft;
1161 if (typedef_type->resolved_type != NULL) {
1162 type = typedef_type->resolved_type;
1165 type = typedef_type->typedefe->type;
1169 const typeof_type_t *typeof_type = &type->typeoft;
1170 if (typeof_type->typeof_type != NULL) {
1171 type = typeof_type->typeof_type;
1173 type = typeof_type->expression->base.type;
1183 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1184 type_t *const copy = duplicate_type(type);
1186 /* for const with typedefed array type the element type has to be
1188 if (is_type_array(copy)) {
1189 type_t *element_type = copy->array.element_type;
1190 element_type = duplicate_type(element_type);
1191 element_type->base.qualifiers |= qualifiers;
1192 element_type->base.modifiers |= modifiers;
1193 copy->array.element_type = element_type;
1195 copy->base.qualifiers |= qualifiers;
1196 copy->base.modifiers |= modifiers;
1199 type = typehash_insert(copy);
1201 obstack_free(type_obst, copy);
1208 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1209 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1212 switch (type->base.kind) {
1214 return TYPE_QUALIFIER_NONE;
1216 qualifiers |= type->base.qualifiers;
1217 const typedef_type_t *typedef_type = &type->typedeft;
1218 if (typedef_type->resolved_type != NULL)
1219 type = typedef_type->resolved_type;
1221 type = typedef_type->typedefe->type;
1224 const typeof_type_t *typeof_type = &type->typeoft;
1225 if (typeof_type->typeof_type != NULL) {
1226 type = typeof_type->typeof_type;
1228 type = typeof_type->expression->base.type;
1233 if (skip_array_type) {
1234 type = type->array.element_type;
1243 return type->base.qualifiers | qualifiers;
1246 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1248 assert(kind <= ATOMIC_TYPE_LAST);
1249 return atomic_type_properties[kind].size;
1252 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1254 assert(kind <= ATOMIC_TYPE_LAST);
1255 return atomic_type_properties[kind].alignment;
1258 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1260 assert(kind <= ATOMIC_TYPE_LAST);
1261 return atomic_type_properties[kind].flags;
1264 atomic_type_kind_t get_intptr_kind(void)
1266 if (machine_size <= 32)
1267 return ATOMIC_TYPE_INT;
1268 else if (machine_size <= 64)
1269 return ATOMIC_TYPE_LONG;
1271 return ATOMIC_TYPE_LONGLONG;
1274 atomic_type_kind_t get_uintptr_kind(void)
1276 if (machine_size <= 32)
1277 return ATOMIC_TYPE_UINT;
1278 else if (machine_size <= 64)
1279 return ATOMIC_TYPE_ULONG;
1281 return ATOMIC_TYPE_ULONGLONG;
1285 * Find the atomic type kind representing a given size (signed).
1287 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1288 static atomic_type_kind_t kinds[32];
1291 atomic_type_kind_t kind = kinds[size];
1292 if (kind == ATOMIC_TYPE_INVALID) {
1293 static const atomic_type_kind_t possible_kinds[] = {
1298 ATOMIC_TYPE_LONGLONG
1300 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1301 if (get_atomic_type_size(possible_kinds[i]) == size) {
1302 kind = possible_kinds[i];
1312 * Find the atomic type kind representing a given size (signed).
1314 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1315 static atomic_type_kind_t kinds[32];
1318 atomic_type_kind_t kind = kinds[size];
1319 if (kind == ATOMIC_TYPE_INVALID) {
1320 static const atomic_type_kind_t possible_kinds[] = {
1325 ATOMIC_TYPE_ULONGLONG
1327 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1328 if (get_atomic_type_size(possible_kinds[i]) == size) {
1329 kind = possible_kinds[i];
1339 * Hash the given type and return the "singleton" version
1342 static type_t *identify_new_type(type_t *type)
1344 type_t *result = typehash_insert(type);
1345 if (result != type) {
1346 obstack_free(type_obst, type);
1352 * Creates a new atomic type.
1354 * @param akind The kind of the atomic type.
1355 * @param qualifiers Type qualifiers for the new type.
1357 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1359 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1360 memset(type, 0, sizeof(atomic_type_t));
1362 type->kind = TYPE_ATOMIC;
1363 type->base.size = get_atomic_type_size(akind);
1364 type->base.alignment = get_atomic_type_alignment(akind);
1365 type->base.qualifiers = qualifiers;
1366 type->atomic.akind = akind;
1368 return identify_new_type(type);
1372 * Creates a new complex type.
1374 * @param akind The kind of the atomic type.
1375 * @param qualifiers Type qualifiers for the new type.
1377 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1379 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1380 memset(type, 0, sizeof(complex_type_t));
1382 type->kind = TYPE_COMPLEX;
1383 type->base.qualifiers = qualifiers;
1384 type->base.alignment = get_atomic_type_alignment(akind);
1385 type->complex.akind = akind;
1387 return identify_new_type(type);
1391 * Creates a new imaginary type.
1393 * @param akind The kind of the atomic type.
1394 * @param qualifiers Type qualifiers for the new type.
1396 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1398 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1399 memset(type, 0, sizeof(imaginary_type_t));
1401 type->kind = TYPE_IMAGINARY;
1402 type->base.qualifiers = qualifiers;
1403 type->base.alignment = get_atomic_type_alignment(akind);
1404 type->imaginary.akind = akind;
1406 return identify_new_type(type);
1410 * Creates a new pointer type.
1412 * @param points_to The points-to type for the new type.
1413 * @param qualifiers Type qualifiers for the new type.
1415 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1417 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1418 memset(type, 0, sizeof(pointer_type_t));
1420 type->kind = TYPE_POINTER;
1421 type->base.qualifiers = qualifiers;
1422 type->base.alignment = 0;
1423 type->pointer.points_to = points_to;
1425 return identify_new_type(type);
1428 type_t *make_array_type(type_t *element_type, size_t size,
1429 type_qualifiers_t qualifiers)
1431 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1432 memset(type, 0, sizeof(array_type_t));
1434 type->kind = TYPE_ARRAY;
1435 type->base.qualifiers = qualifiers;
1436 type->base.alignment = 0;
1437 type->array.element_type = element_type;
1438 type->array.size = size;
1439 type->array.size_constant = true;
1441 return identify_new_type(type);
1445 * Debug helper. Prints the given type to stdout.
1447 static __attribute__((unused))
1448 void dbg_type(const type_t *type)
1450 FILE *old_out = out;