2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include "type_hash.h"
29 #include "adt/error.h"
30 #include "lang_features.h"
32 static struct obstack _type_obst;
34 struct obstack *type_obst = &_type_obst;
35 static int type_visited = 0;
36 static bool print_implicit_array_size = false;
38 static void intern_print_type_pre(const type_t *type, bool top);
39 static void intern_print_type_post(const type_t *type, bool top);
41 typedef struct atomic_type_properties_t atomic_type_properties_t;
42 struct atomic_type_properties_t {
43 unsigned size; /**< type size in bytes */
44 unsigned alignment; /**< type alignment in bytes */
45 unsigned flags; /**< type flags from atomic_type_flag_t */
48 static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
49 //ATOMIC_TYPE_INVALID = 0,
50 [ATOMIC_TYPE_VOID] = {
53 .flags = ATOMIC_TYPE_FLAG_NONE
55 [ATOMIC_TYPE_CHAR] = {
58 /* signed flag will be set when known */
59 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
61 [ATOMIC_TYPE_SCHAR] = {
64 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
65 | ATOMIC_TYPE_FLAG_SIGNED,
67 [ATOMIC_TYPE_UCHAR] = {
70 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
72 [ATOMIC_TYPE_SHORT] = {
75 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
76 | ATOMIC_TYPE_FLAG_SIGNED
78 [ATOMIC_TYPE_USHORT] = {
81 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
84 .size = (unsigned) -1,
85 .alignment = (unsigned) -1,
86 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
87 | ATOMIC_TYPE_FLAG_SIGNED,
89 [ATOMIC_TYPE_UINT] = {
90 .size = (unsigned) -1,
91 .alignment = (unsigned) -1,
92 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
94 [ATOMIC_TYPE_LONG] = {
95 .size = (unsigned) -1,
96 .alignment = (unsigned) -1,
97 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
98 | ATOMIC_TYPE_FLAG_SIGNED,
100 [ATOMIC_TYPE_ULONG] = {
101 .size = (unsigned) -1,
102 .alignment = (unsigned) -1,
103 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
105 [ATOMIC_TYPE_LONGLONG] = {
106 .size = (unsigned) -1,
107 .alignment = (unsigned) -1,
108 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
109 | ATOMIC_TYPE_FLAG_SIGNED,
111 [ATOMIC_TYPE_ULONGLONG] = {
112 .size = (unsigned) -1,
113 .alignment = (unsigned) -1,
114 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
116 [ATOMIC_TYPE_BOOL] = {
117 .size = (unsigned) -1,
118 .alignment = (unsigned) -1,
119 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
121 [ATOMIC_TYPE_FLOAT] = {
123 .alignment = (unsigned) -1,
124 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
125 | ATOMIC_TYPE_FLAG_SIGNED,
127 [ATOMIC_TYPE_DOUBLE] = {
129 .alignment = (unsigned) -1,
130 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
131 | ATOMIC_TYPE_FLAG_SIGNED,
133 [ATOMIC_TYPE_LONG_DOUBLE] = {
135 .alignment = (unsigned) -1,
136 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
137 | ATOMIC_TYPE_FLAG_SIGNED,
139 /* complex and imaginary types are set in init_types */
142 void init_types(void)
144 obstack_init(type_obst);
146 atomic_type_properties_t *props = atomic_type_properties;
148 if (char_is_signed) {
149 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
152 unsigned int_size = machine_size < 32 ? 2 : 4;
153 unsigned long_size = machine_size < 64 ? 4 : 8;
154 unsigned llong_size = machine_size < 32 ? 4 : 8;
156 props[ATOMIC_TYPE_INT].size = int_size;
157 props[ATOMIC_TYPE_INT].alignment = int_size;
158 props[ATOMIC_TYPE_UINT].size = int_size;
159 props[ATOMIC_TYPE_UINT].alignment = int_size;
160 props[ATOMIC_TYPE_LONG].size = long_size;
161 props[ATOMIC_TYPE_LONG].alignment = long_size;
162 props[ATOMIC_TYPE_ULONG].size = long_size;
163 props[ATOMIC_TYPE_ULONG].alignment = long_size;
164 props[ATOMIC_TYPE_LONGLONG].size = llong_size;
165 props[ATOMIC_TYPE_LONGLONG].alignment = llong_size;
166 props[ATOMIC_TYPE_ULONGLONG].size = llong_size;
167 props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size;
169 /* TODO: backend specific, need a way to query the backend for this.
170 * The following are good settings for x86 */
171 props[ATOMIC_TYPE_FLOAT].alignment = 4;
172 props[ATOMIC_TYPE_DOUBLE].alignment = 4;
173 props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
174 props[ATOMIC_TYPE_LONGLONG].alignment = 4;
175 props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
177 /* TODO: make this configurable for platforms which do not use byte sized
179 props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UCHAR];
182 void exit_types(void)
184 obstack_free(type_obst, NULL);
187 void type_set_output(FILE *stream)
192 void inc_type_visited(void)
197 void print_type_qualifiers(type_qualifiers_t qualifiers)
200 if (qualifiers & TYPE_QUALIFIER_CONST) {
201 fputs(" const" + first, out);
204 if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
205 fputs(" volatile" + first, out);
208 if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
209 fputs(" restrict" + first, out);
214 const char *get_atomic_kind_name(atomic_type_kind_t kind)
217 case ATOMIC_TYPE_INVALID: break;
218 case ATOMIC_TYPE_VOID: return "void";
219 case ATOMIC_TYPE_BOOL: return c_mode & _CXX ? "bool" : "_Bool";
220 case ATOMIC_TYPE_CHAR: return "char";
221 case ATOMIC_TYPE_SCHAR: return "signed char";
222 case ATOMIC_TYPE_UCHAR: return "unsigned char";
223 case ATOMIC_TYPE_INT: return "int";
224 case ATOMIC_TYPE_UINT: return "unsigned int";
225 case ATOMIC_TYPE_SHORT: return "short";
226 case ATOMIC_TYPE_USHORT: return "unsigned short";
227 case ATOMIC_TYPE_LONG: return "long";
228 case ATOMIC_TYPE_ULONG: return "unsigned long";
229 case ATOMIC_TYPE_LONGLONG: return "long long";
230 case ATOMIC_TYPE_ULONGLONG: return "unsigned long long";
231 case ATOMIC_TYPE_LONG_DOUBLE: return "long double";
232 case ATOMIC_TYPE_FLOAT: return "float";
233 case ATOMIC_TYPE_DOUBLE: return "double";
235 return "INVALIDATOMIC";
239 * Prints the name of an atomic type kinds.
241 * @param kind The type kind.
243 static void print_atomic_kinds(atomic_type_kind_t kind)
245 const char *s = get_atomic_kind_name(kind);
250 * Prints the name of an atomic type.
252 * @param type The type.
254 static void print_atomic_type(const atomic_type_t *type)
256 print_type_qualifiers(type->base.qualifiers);
257 if (type->base.qualifiers != 0)
259 print_atomic_kinds(type->akind);
263 * Prints the name of a complex type.
265 * @param type The type.
268 void print_complex_type(const complex_type_t *type)
270 int empty = type->base.qualifiers == 0;
271 print_type_qualifiers(type->base.qualifiers);
272 fputs(" _Complex " + empty, out);
273 print_atomic_kinds(type->akind);
277 * Prints the name of an imaginary type.
279 * @param type The type.
282 void print_imaginary_type(const imaginary_type_t *type)
284 int empty = type->base.qualifiers == 0;
285 print_type_qualifiers(type->base.qualifiers);
286 fputs(" _Imaginary " + empty, out);
287 print_atomic_kinds(type->akind);
291 * Print the first part (the prefix) of a type.
293 * @param type The type to print.
294 * @param top true, if this is the top type, false if it's an embedded type.
296 static void print_function_type_pre(const function_type_t *type, bool top)
298 switch (type->linkage) {
299 case LINKAGE_INVALID:
304 fputs("extern \"C\" ", out);
308 if (!(c_mode & _CXX))
309 fputs("extern \"C++\" ", out);
313 print_type_qualifiers(type->base.qualifiers);
314 if (type->base.qualifiers != 0)
317 intern_print_type_pre(type->return_type, false);
319 switch (type->calling_convention) {
320 case CC_CDECL: fputs("__cdecl ", out); break;
321 case CC_STDCALL: fputs("__stdcall ", out); break;
322 case CC_FASTCALL: fputs("__fastcall ", out); break;
323 case CC_THISCALL: fputs("__thiscall ", out); break;
324 case CC_DEFAULT: break;
327 /* don't emit parenthesis if we're the toplevel type... */
333 * Print the second part (the postfix) of a type.
335 * @param type The type to print.
336 * @param top true, if this is the top type, false if it's an embedded type.
338 static void print_function_type_post(const function_type_t *type,
339 const scope_t *parameters, bool top)
341 /* don't emit parenthesis if we're the toplevel type... */
347 if (parameters == NULL) {
348 function_parameter_t *parameter = type->parameters;
349 for( ; parameter != NULL; parameter = parameter->next) {
355 print_type(parameter->type);
358 entity_t *parameter = parameters->entities;
359 for( ; parameter != NULL; parameter = parameter->base.next) {
365 assert(is_declaration(parameter));
366 print_type_ext(parameter->declaration.type, parameter->base.symbol,
370 if (type->variadic) {
378 if (first && !type->unspecified_parameters) {
383 intern_print_type_post(type->return_type, false);
387 * Prints the prefix part of a pointer type.
389 * @param type The pointer type.
391 static void print_pointer_type_pre(const pointer_type_t *type)
393 intern_print_type_pre(type->points_to, false);
394 variable_t *const variable = type->base_variable;
395 if (variable != NULL) {
396 fputs(" __based(", out);
397 fputs(variable->base.base.symbol->string, out);
401 print_type_qualifiers(type->base.qualifiers);
402 if (type->base.qualifiers != 0)
407 * Prints the prefix part of a reference type.
409 * @param type The reference type.
411 static void print_reference_type_pre(const reference_type_t *type)
413 intern_print_type_pre(type->refers_to, false);
418 * Prints the postfix part of a pointer type.
420 * @param type The pointer type.
422 static void print_pointer_type_post(const pointer_type_t *type)
424 intern_print_type_post(type->points_to, false);
428 * Prints the postfix part of a reference type.
430 * @param type The reference type.
432 static void print_reference_type_post(const reference_type_t *type)
434 intern_print_type_post(type->refers_to, false);
438 * Prints the prefix part of an array type.
440 * @param type The array type.
442 static void print_array_type_pre(const array_type_t *type)
444 intern_print_type_pre(type->element_type, false);
448 * Prints the postfix part of an array type.
450 * @param type The array type.
452 static void print_array_type_post(const array_type_t *type)
455 if (type->is_static) {
456 fputs("static ", out);
458 print_type_qualifiers(type->base.qualifiers);
459 if (type->base.qualifiers != 0)
461 if (type->size_expression != NULL
462 && (print_implicit_array_size || !type->has_implicit_size)) {
463 print_expression(type->size_expression);
466 intern_print_type_post(type->element_type, false);
470 * Prints the postfix part of a bitfield type.
472 * @param type The array type.
474 static void print_bitfield_type_post(const bitfield_type_t *type)
477 print_expression(type->size_expression);
478 intern_print_type_post(type->base_type, false);
482 * Prints an enum definition.
484 * @param declaration The enum's type declaration.
486 void print_enum_definition(const enum_t *enume)
492 entity_t *entry = enume->base.next;
493 for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
494 entry = entry->base.next) {
497 fprintf(out, "%s", entry->base.symbol->string);
498 if (entry->enum_value.value != NULL) {
501 /* skip the implicit cast */
502 expression_t *expression = entry->enum_value.value;
503 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
504 expression = expression->unary.value;
506 print_expression(expression);
517 * Prints an enum type.
519 * @param type The enum type.
521 static void print_type_enum(const enum_type_t *type)
523 int empty = type->base.qualifiers == 0;
524 print_type_qualifiers(type->base.qualifiers);
525 fputs(" enum " + empty, out);
527 enum_t *enume = type->enume;
528 symbol_t *symbol = enume->base.symbol;
529 if (symbol != NULL) {
530 fputs(symbol->string, out);
532 print_enum_definition(enume);
537 * Print the compound part of a compound type.
539 void print_compound_definition(const compound_t *compound)
544 entity_t *entity = compound->members.entities;
545 for( ; entity != NULL; entity = entity->base.next) {
546 if (entity->kind != ENTITY_COMPOUND_MEMBER)
550 print_entity(entity);
560 * Prints a compound type.
562 * @param type The compound type.
564 static void print_compound_type(const compound_type_t *type)
566 int empty = type->base.qualifiers == 0;
567 print_type_qualifiers(type->base.qualifiers);
569 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
570 fputs(" struct " + empty, out);
572 assert(type->base.kind == TYPE_COMPOUND_UNION);
573 fputs(" union " + empty, out);
576 compound_t *compound = type->compound;
577 symbol_t *symbol = compound->base.symbol;
578 if (symbol != NULL) {
579 fputs(symbol->string, out);
581 print_compound_definition(compound);
586 * Prints the prefix part of a typedef type.
588 * @param type The typedef type.
590 static void print_typedef_type_pre(const typedef_type_t *const type)
592 print_type_qualifiers(type->base.qualifiers);
593 if (type->base.qualifiers != 0)
595 fputs(type->typedefe->base.symbol->string, out);
599 * Prints the prefix part of a typeof type.
601 * @param type The typeof type.
603 static void print_typeof_type_pre(const typeof_type_t *const type)
605 fputs("typeof(", out);
606 if (type->expression != NULL) {
607 assert(type->typeof_type == NULL);
608 print_expression(type->expression);
610 print_type(type->typeof_type);
616 * Prints the prefix part of a type.
618 * @param type The type.
619 * @param top true if we print the toplevel type, false else.
621 static void intern_print_type_pre(const type_t *const type, const bool top)
625 fputs("<error>", out);
628 fputs("<invalid>", out);
631 print_type_enum(&type->enumt);
634 print_atomic_type(&type->atomic);
637 print_complex_type(&type->complex);
640 print_imaginary_type(&type->imaginary);
642 case TYPE_COMPOUND_STRUCT:
643 case TYPE_COMPOUND_UNION:
644 print_compound_type(&type->compound);
647 fputs(type->builtin.symbol->string, out);
650 print_function_type_pre(&type->function, top);
653 print_pointer_type_pre(&type->pointer);
656 print_reference_type_pre(&type->reference);
659 intern_print_type_pre(type->bitfield.base_type, top);
662 print_array_type_pre(&type->array);
665 print_typedef_type_pre(&type->typedeft);
668 print_typeof_type_pre(&type->typeoft);
671 fputs("unknown", out);
675 * Prints the postfix part of a type.
677 * @param type The type.
678 * @param top true if we print the toplevel type, false else.
680 static void intern_print_type_post(const type_t *const type, const bool top)
684 print_function_type_post(&type->function, NULL, top);
687 print_pointer_type_post(&type->pointer);
690 print_reference_type_post(&type->reference);
693 print_array_type_post(&type->array);
696 print_bitfield_type_post(&type->bitfield);
704 case TYPE_COMPOUND_STRUCT:
705 case TYPE_COMPOUND_UNION:
716 * @param type The type.
718 void print_type(const type_t *const type)
720 print_type_ext(type, NULL, NULL);
723 void print_type_ext(const type_t *const type, const symbol_t *symbol,
724 const scope_t *parameters)
727 fputs("nil type", out);
731 intern_print_type_pre(type, true);
732 if (symbol != NULL) {
734 fputs(symbol->string, out);
736 if (type->kind == TYPE_FUNCTION) {
737 print_function_type_post(&type->function, parameters, true);
739 intern_print_type_post(type, true);
744 * Return the size of a type AST node.
746 * @param type The type.
748 static size_t get_type_size(const type_t *type)
751 case TYPE_ATOMIC: return sizeof(atomic_type_t);
752 case TYPE_COMPLEX: return sizeof(complex_type_t);
753 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
754 case TYPE_COMPOUND_STRUCT:
755 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
756 case TYPE_ENUM: return sizeof(enum_type_t);
757 case TYPE_FUNCTION: return sizeof(function_type_t);
758 case TYPE_POINTER: return sizeof(pointer_type_t);
759 case TYPE_REFERENCE: return sizeof(reference_type_t);
760 case TYPE_ARRAY: return sizeof(array_type_t);
761 case TYPE_BUILTIN: return sizeof(builtin_type_t);
762 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
763 case TYPE_TYPEOF: return sizeof(typeof_type_t);
764 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
765 case TYPE_ERROR: panic("error type found");
766 case TYPE_INVALID: panic("invalid type found");
768 panic("unknown type found");
774 * @param type The type to copy.
775 * @return A copy of the type.
777 * @note This does not produce a deep copy!
779 type_t *duplicate_type(const type_t *type)
781 size_t size = get_type_size(type);
783 type_t *copy = obstack_alloc(type_obst, size);
784 memcpy(copy, type, size);
790 * Returns the unqualified type of a given type.
792 * @param type The type.
793 * @returns The unqualified type.
795 type_t *get_unqualified_type(type_t *type)
797 assert(!is_typeref(type));
799 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
802 type_t *unqualified_type = duplicate_type(type);
803 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
805 type_t *result = typehash_insert(unqualified_type);
806 if (result != unqualified_type) {
807 obstack_free(type_obst, unqualified_type);
813 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
815 type_t *type = skip_typeref(orig_type);
818 if (is_type_array(type)) {
819 /* For array types the element type has to be adjusted */
820 type_t *element_type = type->array.element_type;
821 type_t *qual_element_type = get_qualified_type(element_type, qual);
823 if (qual_element_type == element_type)
826 copy = duplicate_type(type);
827 copy->array.element_type = qual_element_type;
828 } else if (is_type_valid(type)) {
829 if ((type->base.qualifiers & qual) == qual)
832 copy = duplicate_type(type);
833 copy->base.qualifiers |= qual;
838 type = typehash_insert(copy);
840 obstack_free(type_obst, copy);
846 * Check if a type is valid.
848 * @param type The type to check.
849 * @return true if type represents a valid type.
851 bool type_valid(const type_t *type)
853 return type->kind != TYPE_INVALID;
856 static bool test_atomic_type_flag(atomic_type_kind_t kind,
857 atomic_type_flag_t flag)
859 assert(kind <= ATOMIC_TYPE_LAST);
860 return (atomic_type_properties[kind].flags & flag) != 0;
864 * Returns true if the given type is an integer type.
866 * @param type The type to check.
867 * @return True if type is an integer type.
869 bool is_type_integer(const type_t *type)
871 assert(!is_typeref(type));
873 if (type->kind == TYPE_ENUM)
875 if (type->kind == TYPE_BITFIELD)
878 if (type->kind != TYPE_ATOMIC)
881 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
885 * Returns true if the given type is an enum type.
887 * @param type The type to check.
888 * @return True if type is an enum type.
890 bool is_type_enum(const type_t *type)
892 assert(!is_typeref(type));
893 return type->kind == TYPE_ENUM;
897 * Returns true if the given type is an floating point type.
899 * @param type The type to check.
900 * @return True if type is a floating point type.
902 bool is_type_float(const type_t *type)
904 assert(!is_typeref(type));
906 if (type->kind != TYPE_ATOMIC)
909 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
913 * Returns true if the given type is an complex type.
915 * @param type The type to check.
916 * @return True if type is a complex type.
918 bool is_type_complex(const type_t *type)
920 assert(!is_typeref(type));
922 if (type->kind != TYPE_ATOMIC)
925 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
929 * Returns true if the given type is a signed type.
931 * @param type The type to check.
932 * @return True if type is a signed type.
934 bool is_type_signed(const type_t *type)
936 assert(!is_typeref(type));
938 /* enum types are int for now */
939 if (type->kind == TYPE_ENUM)
941 if (type->kind == TYPE_BITFIELD)
942 return is_type_signed(type->bitfield.base_type);
944 if (type->kind != TYPE_ATOMIC)
947 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
951 * Returns true if the given type represents an arithmetic type.
953 * @param type The type to check.
954 * @return True if type represents an arithmetic type.
956 bool is_type_arithmetic(const type_t *type)
958 assert(!is_typeref(type));
965 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
967 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
969 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
976 * Returns true if the given type is an integer or float type.
978 * @param type The type to check.
979 * @return True if type is an integer or float type.
981 bool is_type_real(const type_t *type)
984 return is_type_integer(type) || is_type_float(type);
988 * Returns true if the given type represents a scalar type.
990 * @param type The type to check.
991 * @return True if type represents a scalar type.
993 bool is_type_scalar(const type_t *type)
995 assert(!is_typeref(type));
997 switch (type->kind) {
998 case TYPE_POINTER: return true;
999 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
1003 return is_type_arithmetic(type);
1007 * Check if a given type is incomplete.
1009 * @param type The type to check.
1010 * @return True if the given type is incomplete (ie. just forward).
1012 bool is_type_incomplete(const type_t *type)
1014 assert(!is_typeref(type));
1016 switch(type->kind) {
1017 case TYPE_COMPOUND_STRUCT:
1018 case TYPE_COMPOUND_UNION: {
1019 const compound_type_t *compound_type = &type->compound;
1020 return !compound_type->compound->complete;
1026 return type->array.size_expression == NULL
1027 && !type->array.size_constant;
1030 return type->atomic.akind == ATOMIC_TYPE_VOID;
1033 return type->complex.akind == ATOMIC_TYPE_VOID;
1035 case TYPE_IMAGINARY:
1036 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1041 case TYPE_REFERENCE:
1048 panic("is_type_incomplete called without typerefs skipped");
1053 panic("invalid type found");
1056 bool is_type_object(const type_t *type)
1058 return !is_type_function(type) && !is_type_incomplete(type);
1062 * Check if two function types are compatible.
1064 static bool function_types_compatible(const function_type_t *func1,
1065 const function_type_t *func2)
1067 const type_t* const ret1 = skip_typeref(func1->return_type);
1068 const type_t* const ret2 = skip_typeref(func2->return_type);
1069 if (!types_compatible(ret1, ret2))
1072 if (func1->linkage != func2->linkage)
1075 if (func1->calling_convention != func2->calling_convention)
1078 /* can parameters be compared? */
1079 if (func1->unspecified_parameters || func2->unspecified_parameters)
1082 if (func1->variadic != func2->variadic)
1085 /* TODO: handling of unspecified parameters not correct yet */
1087 /* all argument types must be compatible */
1088 function_parameter_t *parameter1 = func1->parameters;
1089 function_parameter_t *parameter2 = func2->parameters;
1090 for ( ; parameter1 != NULL && parameter2 != NULL;
1091 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1092 type_t *parameter1_type = skip_typeref(parameter1->type);
1093 type_t *parameter2_type = skip_typeref(parameter2->type);
1095 parameter1_type = get_unqualified_type(parameter1_type);
1096 parameter2_type = get_unqualified_type(parameter2_type);
1098 if (!types_compatible(parameter1_type, parameter2_type))
1101 /* same number of arguments? */
1102 if (parameter1 != NULL || parameter2 != NULL)
1109 * Check if two array types are compatible.
1111 static bool array_types_compatible(const array_type_t *array1,
1112 const array_type_t *array2)
1114 type_t *element_type1 = skip_typeref(array1->element_type);
1115 type_t *element_type2 = skip_typeref(array2->element_type);
1116 if (!types_compatible(element_type1, element_type2))
1119 if (!array1->size_constant || !array2->size_constant)
1122 return array1->size == array2->size;
1126 * Check if two types are compatible.
1128 bool types_compatible(const type_t *type1, const type_t *type2)
1130 assert(!is_typeref(type1));
1131 assert(!is_typeref(type2));
1133 /* shortcut: the same type is always compatible */
1137 if (!is_type_valid(type1) || !is_type_valid(type2))
1140 if (type1->base.qualifiers != type2->base.qualifiers)
1142 if (type1->kind != type2->kind)
1145 switch (type1->kind) {
1147 return function_types_compatible(&type1->function, &type2->function);
1149 return type1->atomic.akind == type2->atomic.akind;
1151 return type1->complex.akind == type2->complex.akind;
1152 case TYPE_IMAGINARY:
1153 return type1->imaginary.akind == type2->imaginary.akind;
1155 return array_types_compatible(&type1->array, &type2->array);
1157 case TYPE_POINTER: {
1158 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1159 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1160 return types_compatible(to1, to2);
1163 case TYPE_REFERENCE: {
1164 const type_t *const to1 = skip_typeref(type1->reference.refers_to);
1165 const type_t *const to2 = skip_typeref(type2->reference.refers_to);
1166 return types_compatible(to1, to2);
1169 case TYPE_COMPOUND_STRUCT:
1170 case TYPE_COMPOUND_UNION:
1173 /* TODO: not implemented */
1177 /* not sure if this makes sense or is even needed, implement it if you
1178 * really need it! */
1179 panic("type compatibility check for bitfield type");
1182 /* Hmm, the error type should be compatible to all other types */
1185 panic("invalid type found in compatible types");
1188 panic("typerefs not skipped in compatible types?!?");
1191 /* TODO: incomplete */
1196 * Skip all typerefs and return the underlying type.
1198 type_t *skip_typeref(type_t *type)
1200 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1201 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1204 switch (type->kind) {
1207 case TYPE_TYPEDEF: {
1208 qualifiers |= type->base.qualifiers;
1209 modifiers |= type->base.modifiers;
1210 const typedef_type_t *typedef_type = &type->typedeft;
1211 if (typedef_type->resolved_type != NULL) {
1212 type = typedef_type->resolved_type;
1215 type = typedef_type->typedefe->type;
1219 const typeof_type_t *typeof_type = &type->typeoft;
1220 if (typeof_type->typeof_type != NULL) {
1221 type = typeof_type->typeof_type;
1223 type = typeof_type->expression->base.type;
1233 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1234 type_t *const copy = duplicate_type(type);
1236 /* for const with typedefed array type the element type has to be
1238 if (is_type_array(copy)) {
1239 type_t *element_type = copy->array.element_type;
1240 element_type = duplicate_type(element_type);
1241 element_type->base.qualifiers |= qualifiers;
1242 element_type->base.modifiers |= modifiers;
1243 copy->array.element_type = element_type;
1245 copy->base.qualifiers |= qualifiers;
1246 copy->base.modifiers |= modifiers;
1249 type = typehash_insert(copy);
1251 obstack_free(type_obst, copy);
1258 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1259 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1262 switch (type->base.kind) {
1264 return TYPE_QUALIFIER_NONE;
1266 qualifiers |= type->base.qualifiers;
1267 const typedef_type_t *typedef_type = &type->typedeft;
1268 if (typedef_type->resolved_type != NULL)
1269 type = typedef_type->resolved_type;
1271 type = typedef_type->typedefe->type;
1274 const typeof_type_t *typeof_type = &type->typeoft;
1275 if (typeof_type->typeof_type != NULL) {
1276 type = typeof_type->typeof_type;
1278 type = typeof_type->expression->base.type;
1283 if (skip_array_type) {
1284 type = type->array.element_type;
1293 return type->base.qualifiers | qualifiers;
1296 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1298 assert(kind <= ATOMIC_TYPE_LAST);
1299 return atomic_type_properties[kind].size;
1302 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1304 assert(kind <= ATOMIC_TYPE_LAST);
1305 return atomic_type_properties[kind].alignment;
1308 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1310 assert(kind <= ATOMIC_TYPE_LAST);
1311 return atomic_type_properties[kind].flags;
1314 atomic_type_kind_t get_intptr_kind(void)
1316 if (machine_size <= 32)
1317 return ATOMIC_TYPE_INT;
1318 else if (machine_size <= 64)
1319 return ATOMIC_TYPE_LONG;
1321 return ATOMIC_TYPE_LONGLONG;
1324 atomic_type_kind_t get_uintptr_kind(void)
1326 if (machine_size <= 32)
1327 return ATOMIC_TYPE_UINT;
1328 else if (machine_size <= 64)
1329 return ATOMIC_TYPE_ULONG;
1331 return ATOMIC_TYPE_ULONGLONG;
1335 * Find the atomic type kind representing a given size (signed).
1337 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1338 static atomic_type_kind_t kinds[32];
1341 atomic_type_kind_t kind = kinds[size];
1342 if (kind == ATOMIC_TYPE_INVALID) {
1343 static const atomic_type_kind_t possible_kinds[] = {
1348 ATOMIC_TYPE_LONGLONG
1350 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1351 if (get_atomic_type_size(possible_kinds[i]) == size) {
1352 kind = possible_kinds[i];
1362 * Find the atomic type kind representing a given size (signed).
1364 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1365 static atomic_type_kind_t kinds[32];
1368 atomic_type_kind_t kind = kinds[size];
1369 if (kind == ATOMIC_TYPE_INVALID) {
1370 static const atomic_type_kind_t possible_kinds[] = {
1375 ATOMIC_TYPE_ULONGLONG
1377 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1378 if (get_atomic_type_size(possible_kinds[i]) == size) {
1379 kind = possible_kinds[i];
1389 * Hash the given type and return the "singleton" version
1392 static type_t *identify_new_type(type_t *type)
1394 type_t *result = typehash_insert(type);
1395 if (result != type) {
1396 obstack_free(type_obst, type);
1402 * Creates a new atomic type.
1404 * @param akind The kind of the atomic type.
1405 * @param qualifiers Type qualifiers for the new type.
1407 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1409 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1410 memset(type, 0, sizeof(atomic_type_t));
1412 type->kind = TYPE_ATOMIC;
1413 type->base.size = get_atomic_type_size(akind);
1414 type->base.alignment = get_atomic_type_alignment(akind);
1415 type->base.qualifiers = qualifiers;
1416 type->atomic.akind = akind;
1418 return identify_new_type(type);
1422 * Creates a new complex type.
1424 * @param akind The kind of the atomic type.
1425 * @param qualifiers Type qualifiers for the new type.
1427 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1429 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1430 memset(type, 0, sizeof(complex_type_t));
1432 type->kind = TYPE_COMPLEX;
1433 type->base.qualifiers = qualifiers;
1434 type->base.alignment = get_atomic_type_alignment(akind);
1435 type->complex.akind = akind;
1437 return identify_new_type(type);
1441 * Creates a new imaginary type.
1443 * @param akind The kind of the atomic type.
1444 * @param qualifiers Type qualifiers for the new type.
1446 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1448 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1449 memset(type, 0, sizeof(imaginary_type_t));
1451 type->kind = TYPE_IMAGINARY;
1452 type->base.qualifiers = qualifiers;
1453 type->base.alignment = get_atomic_type_alignment(akind);
1454 type->imaginary.akind = akind;
1456 return identify_new_type(type);
1460 * Creates a new pointer type.
1462 * @param points_to The points-to type for the new type.
1463 * @param qualifiers Type qualifiers for the new type.
1465 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1467 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1468 memset(type, 0, sizeof(pointer_type_t));
1470 type->kind = TYPE_POINTER;
1471 type->base.qualifiers = qualifiers;
1472 type->base.alignment = 0;
1473 type->pointer.points_to = points_to;
1474 type->pointer.base_variable = NULL;
1476 return identify_new_type(type);
1480 * Creates a new reference type.
1482 * @param refers_to The referred-to type for the new type.
1484 type_t *make_reference_type(type_t *refers_to)
1486 type_t *type = obstack_alloc(type_obst, sizeof(reference_type_t));
1487 memset(type, 0, sizeof(reference_type_t));
1489 type->kind = TYPE_REFERENCE;
1490 type->base.qualifiers = 0;
1491 type->base.alignment = 0;
1492 type->reference.refers_to = refers_to;
1494 return identify_new_type(type);
1498 * Creates a new based pointer type.
1500 * @param points_to The points-to type for the new type.
1501 * @param qualifiers Type qualifiers for the new type.
1502 * @param variable The based variable
1504 type_t *make_based_pointer_type(type_t *points_to,
1505 type_qualifiers_t qualifiers, variable_t *variable)
1507 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1508 memset(type, 0, sizeof(pointer_type_t));
1510 type->kind = TYPE_POINTER;
1511 type->base.qualifiers = qualifiers;
1512 type->base.alignment = 0;
1513 type->pointer.points_to = points_to;
1514 type->pointer.base_variable = variable;
1516 return identify_new_type(type);
1520 type_t *make_array_type(type_t *element_type, size_t size,
1521 type_qualifiers_t qualifiers)
1523 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1524 memset(type, 0, sizeof(array_type_t));
1526 type->kind = TYPE_ARRAY;
1527 type->base.qualifiers = qualifiers;
1528 type->base.alignment = 0;
1529 type->array.element_type = element_type;
1530 type->array.size = size;
1531 type->array.size_constant = true;
1533 return identify_new_type(type);
1537 * Debug helper. Prints the given type to stdout.
1539 static __attribute__((unused))
1540 void dbg_type(const type_t *type)
1542 FILE *old_out = out;