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
27 #include "type_hash.h"
28 #include "adt/error.h"
29 #include "lang_features.h"
31 static struct obstack _type_obst;
33 struct obstack *type_obst = &_type_obst;
34 static int type_visited = 0;
35 static bool print_implicit_array_size = false;
37 static void intern_print_type_pre(const type_t *type, bool top);
38 static void intern_print_type_post(const type_t *type, bool top);
40 typedef struct atomic_type_properties_t atomic_type_properties_t;
41 struct atomic_type_properties_t {
42 unsigned size; /**< type size in bytes */
43 unsigned alignment; /**< type alignment in bytes */
44 unsigned flags; /**< type flags from atomic_type_flag_t */
47 static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
48 //ATOMIC_TYPE_INVALID = 0,
49 [ATOMIC_TYPE_VOID] = {
52 .flags = ATOMIC_TYPE_FLAG_NONE
54 [ATOMIC_TYPE_CHAR] = {
57 /* signed flag will be set when known */
58 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
60 [ATOMIC_TYPE_SCHAR] = {
63 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
64 | ATOMIC_TYPE_FLAG_SIGNED,
66 [ATOMIC_TYPE_UCHAR] = {
69 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
71 [ATOMIC_TYPE_SHORT] = {
74 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
75 | ATOMIC_TYPE_FLAG_SIGNED
77 [ATOMIC_TYPE_USHORT] = {
80 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
83 .size = (unsigned) -1,
84 .alignment = (unsigned) -1,
85 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
86 | ATOMIC_TYPE_FLAG_SIGNED,
88 [ATOMIC_TYPE_UINT] = {
89 .size = (unsigned) -1,
90 .alignment = (unsigned) -1,
91 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
93 [ATOMIC_TYPE_LONG] = {
94 .size = (unsigned) -1,
95 .alignment = (unsigned) -1,
96 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
97 | ATOMIC_TYPE_FLAG_SIGNED,
99 [ATOMIC_TYPE_ULONG] = {
100 .size = (unsigned) -1,
101 .alignment = (unsigned) -1,
102 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
104 [ATOMIC_TYPE_LONGLONG] = {
105 .size = (unsigned) -1,
106 .alignment = (unsigned) -1,
107 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
108 | ATOMIC_TYPE_FLAG_SIGNED,
110 [ATOMIC_TYPE_ULONGLONG] = {
111 .size = (unsigned) -1,
112 .alignment = (unsigned) -1,
113 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
115 [ATOMIC_TYPE_BOOL] = {
116 .size = (unsigned) -1,
117 .alignment = (unsigned) -1,
118 .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
120 [ATOMIC_TYPE_FLOAT] = {
122 .alignment = (unsigned) -1,
123 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
124 | ATOMIC_TYPE_FLAG_SIGNED,
126 [ATOMIC_TYPE_DOUBLE] = {
128 .alignment = (unsigned) -1,
129 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
130 | ATOMIC_TYPE_FLAG_SIGNED,
132 [ATOMIC_TYPE_LONG_DOUBLE] = {
134 .alignment = (unsigned) -1,
135 .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
136 | ATOMIC_TYPE_FLAG_SIGNED,
138 /* complex and imaginary types are set in init_types */
141 void init_types(void)
143 obstack_init(type_obst);
145 atomic_type_properties_t *props = atomic_type_properties;
147 if (char_is_signed) {
148 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
151 unsigned int_size = machine_size < 32 ? 2 : 4;
152 unsigned long_size = machine_size < 64 ? 4 : 8;
153 unsigned llong_size = machine_size < 32 ? 4 : 8;
155 props[ATOMIC_TYPE_INT].size = int_size;
156 props[ATOMIC_TYPE_INT].alignment = int_size;
157 props[ATOMIC_TYPE_UINT].size = int_size;
158 props[ATOMIC_TYPE_UINT].alignment = int_size;
159 props[ATOMIC_TYPE_LONG].size = long_size;
160 props[ATOMIC_TYPE_LONG].alignment = long_size;
161 props[ATOMIC_TYPE_ULONG].size = long_size;
162 props[ATOMIC_TYPE_ULONG].alignment = long_size;
163 props[ATOMIC_TYPE_LONGLONG].size = llong_size;
164 props[ATOMIC_TYPE_LONGLONG].alignment = llong_size;
165 props[ATOMIC_TYPE_ULONGLONG].size = llong_size;
166 props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size;
168 /* TODO: backend specific, need a way to query the backend for this.
169 * The following are good settings for x86 */
170 props[ATOMIC_TYPE_FLOAT].alignment = 4;
171 props[ATOMIC_TYPE_DOUBLE].alignment = 4;
172 props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
173 props[ATOMIC_TYPE_LONGLONG].alignment = 4;
174 props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
176 props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UINT];
179 void exit_types(void)
181 obstack_free(type_obst, NULL);
184 void type_set_output(FILE *stream)
189 void inc_type_visited(void)
194 void print_type_qualifiers(type_qualifiers_t qualifiers)
197 if (qualifiers & TYPE_QUALIFIER_CONST) {
198 fputs(" const" + first, out);
201 if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
202 fputs(" volatile" + first, out);
205 if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
206 fputs(" restrict" + first, out);
212 * Prints the name of an atomic type kinds.
214 * @param kind The type kind.
217 void print_atomic_kinds(atomic_type_kind_t kind)
219 const char *s = "INVALIDATOMIC";
221 case ATOMIC_TYPE_INVALID: break;
222 case ATOMIC_TYPE_VOID: s = "void"; break;
223 case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
224 case ATOMIC_TYPE_CHAR: s = "char"; break;
225 case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
226 case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
227 case ATOMIC_TYPE_INT: s = "int"; break;
228 case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
229 case ATOMIC_TYPE_SHORT: s = "short"; break;
230 case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
231 case ATOMIC_TYPE_LONG: s = "long"; break;
232 case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
233 case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
234 case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
235 case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break;
236 case ATOMIC_TYPE_FLOAT: s = "float"; break;
237 case ATOMIC_TYPE_DOUBLE: s = "double"; break;
243 * Prints the name of an atomic type.
245 * @param type The type.
248 void print_atomic_type(const atomic_type_t *type)
250 print_type_qualifiers(type->base.qualifiers);
251 if (type->base.qualifiers != 0)
253 print_atomic_kinds(type->akind);
257 * Prints the name of a complex type.
259 * @param type The type.
262 void print_complex_type(const complex_type_t *type)
264 int empty = type->base.qualifiers == 0;
265 print_type_qualifiers(type->base.qualifiers);
266 fputs(" _Complex " + empty, out);
267 print_atomic_kinds(type->akind);
271 * Prints the name of an imaginary type.
273 * @param type The type.
276 void print_imaginary_type(const imaginary_type_t *type)
278 int empty = type->base.qualifiers == 0;
279 print_type_qualifiers(type->base.qualifiers);
280 fputs(" _Imaginary " + empty, out);
281 print_atomic_kinds(type->akind);
285 * Print the first part (the prefix) of a type.
287 * @param type The type to print.
288 * @param top true, if this is the top type, false if it's an embedded type.
290 static void print_function_type_pre(const function_type_t *type, bool top)
292 print_type_qualifiers(type->base.qualifiers);
293 if (type->base.qualifiers != 0)
297 intern_print_type_pre(type->return_type, false);
299 switch (type->calling_convention) {
301 fputs("__cdecl ", out);
304 fputs("__stdcall ", out);
307 fputs("__fastcall ", out);
310 fputs("__thiscall ", out);
316 /* don't emit parenthesis if we're the toplevel type... */
322 * Print the second part (the postfix) of a type.
324 * @param type The type to print.
325 * @param top true, if this is the top type, false if it's an embedded type.
327 static void print_function_type_post(const function_type_t *type,
328 const scope_t *scope, bool top)
330 /* don't emit parenthesis if we're the toplevel type... */
337 function_parameter_t *parameter = type->parameters;
338 for( ; parameter != NULL; parameter = parameter->next) {
344 print_type(parameter->type);
347 declaration_t *parameter = scope->declarations;
348 for( ; parameter != NULL; parameter = parameter->next) {
354 print_type_ext(parameter->type, parameter->symbol,
358 if (type->variadic) {
366 if (first && !type->unspecified_parameters) {
371 intern_print_type_post(type->return_type, false);
375 * Prints the prefix part of a pointer type.
377 * @param type The pointer type.
379 static void print_pointer_type_pre(const pointer_type_t *type)
381 intern_print_type_pre(type->points_to, false);
383 print_type_qualifiers(type->base.qualifiers);
384 if (type->base.qualifiers != 0)
389 * Prints the postfix part of a pointer type.
391 * @param type The pointer type.
393 static void print_pointer_type_post(const pointer_type_t *type)
395 intern_print_type_post(type->points_to, false);
399 * Prints the prefix part of an array type.
401 * @param type The array type.
403 static void print_array_type_pre(const array_type_t *type)
405 intern_print_type_pre(type->element_type, false);
409 * Prints the postfix part of an array type.
411 * @param type The array type.
413 static void print_array_type_post(const array_type_t *type)
416 if (type->is_static) {
417 fputs("static ", out);
419 print_type_qualifiers(type->base.qualifiers);
420 if (type->base.qualifiers != 0)
422 if (type->size_expression != NULL
423 && (print_implicit_array_size || !type->has_implicit_size)) {
424 print_expression(type->size_expression);
427 intern_print_type_post(type->element_type, false);
431 * Prints the postfix part of a bitfield type.
433 * @param type The array type.
435 static void print_bitfield_type_post(const bitfield_type_t *type)
438 print_expression(type->size);
439 intern_print_type_post(type->base_type, false);
443 * Prints an enum definition.
445 * @param declaration The enum's type declaration.
447 void print_enum_definition(const declaration_t *declaration)
453 declaration_t *entry = declaration->next;
454 for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
455 entry = entry->next) {
458 fprintf(out, "%s", entry->symbol->string);
459 if (entry->init.initializer != NULL) {
462 /* skip the implicit cast */
463 expression_t *expression = entry->init.enum_value;
464 if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
465 expression = expression->unary.value;
467 print_expression(expression);
478 * Prints an enum type.
480 * @param type The enum type.
482 static void print_type_enum(const enum_type_t *type)
484 int empty = type->base.qualifiers == 0;
485 print_type_qualifiers(type->base.qualifiers);
486 fputs(" enum " + empty, out);
488 declaration_t *declaration = type->declaration;
489 symbol_t *symbol = declaration->symbol;
490 if (symbol != NULL) {
491 fputs(symbol->string, out);
493 print_enum_definition(declaration);
498 * Print the compound part of a compound type.
500 * @param declaration The declaration of the compound type.
502 void print_compound_definition(const declaration_t *declaration)
507 declaration_t *iter = declaration->scope.declarations;
508 for( ; iter != NULL; iter = iter->next) {
510 print_declaration(iter);
520 * Prints a compound type.
522 * @param type The compound type.
524 static void print_compound_type(const compound_type_t *type)
526 int empty = type->base.qualifiers == 0;
527 print_type_qualifiers(type->base.qualifiers);
529 if (type->base.kind == TYPE_COMPOUND_STRUCT) {
530 fputs(" struct " + empty, out);
532 assert(type->base.kind == TYPE_COMPOUND_UNION);
533 fputs(" union " + empty, out);
536 declaration_t *declaration = type->declaration;
537 symbol_t *symbol = declaration->symbol;
538 if (symbol != NULL) {
539 fputs(symbol->string, out);
541 print_compound_definition(declaration);
546 * Prints the prefix part of a typedef type.
548 * @param type The typedef type.
550 static void print_typedef_type_pre(const typedef_type_t *const type)
552 print_type_qualifiers(type->base.qualifiers);
553 if (type->base.qualifiers != 0)
555 fputs(type->declaration->symbol->string, out);
559 * Prints the prefix part of a typeof type.
561 * @param type The typeof type.
563 static void print_typeof_type_pre(const typeof_type_t *const type)
565 fputs("typeof(", out);
566 if (type->expression != NULL) {
567 assert(type->typeof_type == NULL);
568 print_expression(type->expression);
570 print_type(type->typeof_type);
576 * Prints the prefix part of a type.
578 * @param type The type.
579 * @param top true if we print the toplevel type, false else.
581 static void intern_print_type_pre(const type_t *const type, const bool top)
585 fputs("<error>", out);
588 fputs("<invalid>", out);
591 print_type_enum(&type->enumt);
594 print_atomic_type(&type->atomic);
597 print_complex_type(&type->complex);
600 print_imaginary_type(&type->imaginary);
602 case TYPE_COMPOUND_STRUCT:
603 case TYPE_COMPOUND_UNION:
604 print_compound_type(&type->compound);
607 fputs(type->builtin.symbol->string, out);
610 print_function_type_pre(&type->function, top);
613 print_pointer_type_pre(&type->pointer);
616 intern_print_type_pre(type->bitfield.base_type, top);
619 print_array_type_pre(&type->array);
622 print_typedef_type_pre(&type->typedeft);
625 print_typeof_type_pre(&type->typeoft);
628 fputs("unknown", out);
632 * Prints the postfix part of a type.
634 * @param type The type.
635 * @param top true if we print the toplevel type, false else.
637 static void intern_print_type_post(const type_t *const type, const bool top)
641 print_function_type_post(&type->function, NULL, top);
644 print_pointer_type_post(&type->pointer);
647 print_array_type_post(&type->array);
650 print_bitfield_type_post(&type->bitfield);
658 case TYPE_COMPOUND_STRUCT:
659 case TYPE_COMPOUND_UNION:
670 * @param type The type.
672 void print_type(const type_t *const type)
674 print_type_ext(type, NULL, NULL);
677 void print_type_ext(const type_t *const type, const symbol_t *symbol,
678 const scope_t *scope)
681 fputs("nil type", out);
685 intern_print_type_pre(type, true);
686 if (symbol != NULL) {
688 fputs(symbol->string, out);
690 if (type->kind == TYPE_FUNCTION) {
691 print_function_type_post(&type->function, scope, true);
693 intern_print_type_post(type, true);
698 * Return the size of a type AST node.
700 * @param type The type.
702 static size_t get_type_size(const type_t *type)
705 case TYPE_ATOMIC: return sizeof(atomic_type_t);
706 case TYPE_COMPLEX: return sizeof(complex_type_t);
707 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
708 case TYPE_COMPOUND_STRUCT:
709 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
710 case TYPE_ENUM: return sizeof(enum_type_t);
711 case TYPE_FUNCTION: return sizeof(function_type_t);
712 case TYPE_POINTER: return sizeof(pointer_type_t);
713 case TYPE_ARRAY: return sizeof(array_type_t);
714 case TYPE_BUILTIN: return sizeof(builtin_type_t);
715 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
716 case TYPE_TYPEOF: return sizeof(typeof_type_t);
717 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
718 case TYPE_ERROR: panic("error type found");
719 case TYPE_INVALID: panic("invalid type found");
721 panic("unknown type found");
727 * @param type The type to copy.
728 * @return A copy of the type.
730 * @note This does not produce a deep copy!
732 type_t *duplicate_type(const type_t *type)
734 size_t size = get_type_size(type);
736 type_t *copy = obstack_alloc(type_obst, size);
737 memcpy(copy, type, size);
743 * Returns the unqualified type of a given type.
745 * @param type The type.
746 * @returns The unqualified type.
748 type_t *get_unqualified_type(type_t *type)
750 if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
753 type_t *unqualified_type = duplicate_type(type);
754 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
756 type_t *result = typehash_insert(unqualified_type);
757 if (result != unqualified_type) {
758 obstack_free(type_obst, unqualified_type);
764 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
766 type_t *type = skip_typeref(orig_type);
769 if (is_type_array(type)) {
770 /* For array types the element type has to be adjusted */
771 type_t *element_type = type->array.element_type;
772 type_t *qual_element_type = get_qualified_type(element_type, qual);
774 if (qual_element_type == element_type)
777 copy = duplicate_type(type);
778 copy->array.element_type = qual_element_type;
779 } else if (is_type_valid(type)) {
780 if ((type->base.qualifiers & qual) == qual)
783 copy = duplicate_type(type);
784 copy->base.qualifiers |= qual;
789 type = typehash_insert(copy);
791 obstack_free(type_obst, copy);
797 * Check if a type is valid.
799 * @param type The type to check.
800 * @return true if type represents a valid type.
802 bool type_valid(const type_t *type)
804 return type->kind != TYPE_INVALID;
807 static bool test_atomic_type_flag(atomic_type_kind_t kind,
808 atomic_type_flag_t flag)
810 assert(kind <= ATOMIC_TYPE_LAST);
811 return (atomic_type_properties[kind].flags & flag) != 0;
815 * Returns true if the given type is an integer type.
817 * @param type The type to check.
818 * @return True if type is an integer type.
820 bool is_type_integer(const type_t *type)
822 assert(!is_typeref(type));
824 if (type->kind == TYPE_ENUM)
826 if (type->kind == TYPE_BITFIELD)
829 if (type->kind != TYPE_ATOMIC)
832 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
836 * Returns true if the given type is an enum type.
838 * @param type The type to check.
839 * @return True if type is an enum type.
841 bool is_type_enum(const type_t *type)
843 assert(!is_typeref(type));
844 return type->kind == TYPE_ENUM;
848 * Returns true if the given type is an floating point type.
850 * @param type The type to check.
851 * @return True if type is a floating point type.
853 bool is_type_float(const type_t *type)
855 assert(!is_typeref(type));
857 if (type->kind != TYPE_ATOMIC)
860 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
864 * Returns true if the given type is an complex type.
866 * @param type The type to check.
867 * @return True if type is a complex type.
869 bool is_type_complex(const type_t *type)
871 assert(!is_typeref(type));
873 if (type->kind != TYPE_ATOMIC)
876 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
880 * Returns true if the given type is a signed type.
882 * @param type The type to check.
883 * @return True if type is a signed type.
885 bool is_type_signed(const type_t *type)
887 assert(!is_typeref(type));
889 /* enum types are int for now */
890 if (type->kind == TYPE_ENUM)
892 if (type->kind == TYPE_BITFIELD)
893 return is_type_signed(type->bitfield.base_type);
895 if (type->kind != TYPE_ATOMIC)
898 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
902 * Returns true if the given type represents an arithmetic type.
904 * @param type The type to check.
905 * @return True if type represents an arithmetic type.
907 bool is_type_arithmetic(const type_t *type)
909 assert(!is_typeref(type));
916 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
918 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
920 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
927 * Returns true if the given type is an integer or float type.
929 * @param type The type to check.
930 * @return True if type is an integer or float type.
932 bool is_type_real(const type_t *type)
935 return is_type_integer(type)
936 || (type->kind == TYPE_ATOMIC && is_type_float(type));
940 * Returns true if the given type represents a scalar type.
942 * @param type The type to check.
943 * @return True if type represents a scalar type.
945 bool is_type_scalar(const type_t *type)
947 assert(!is_typeref(type));
949 switch (type->kind) {
950 case TYPE_POINTER: return true;
951 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
955 return is_type_arithmetic(type);
959 * Check if a given type is incomplete.
961 * @param type The type to check.
962 * @return True if the given type is incomplete (ie. just forward).
964 bool is_type_incomplete(const type_t *type)
966 assert(!is_typeref(type));
969 case TYPE_COMPOUND_STRUCT:
970 case TYPE_COMPOUND_UNION: {
971 const compound_type_t *compound_type = &type->compound;
972 declaration_t *declaration = compound_type->declaration;
973 return !declaration->init.complete;
976 const enum_type_t *enum_type = &type->enumt;
977 declaration_t *declaration = enum_type->declaration;
978 return !declaration->init.complete;
982 return type->array.size_expression == NULL
983 && !type->array.size_constant;
986 return type->atomic.akind == ATOMIC_TYPE_VOID;
989 return type->complex.akind == ATOMIC_TYPE_VOID;
992 return type->imaginary.akind == ATOMIC_TYPE_VOID;
1003 panic("is_type_incomplete called without typerefs skipped");
1008 panic("invalid type found");
1011 bool is_type_object(const type_t *type)
1013 return !is_type_function(type) && !is_type_incomplete(type);
1017 * Check if two function types are compatible.
1019 static bool function_types_compatible(const function_type_t *func1,
1020 const function_type_t *func2)
1022 const type_t* const ret1 = skip_typeref(func1->return_type);
1023 const type_t* const ret2 = skip_typeref(func2->return_type);
1024 if (!types_compatible(ret1, ret2))
1027 /* can parameters be compared? */
1028 if (func1->unspecified_parameters || func2->unspecified_parameters)
1031 if (func1->variadic != func2->variadic)
1034 if (func1->calling_convention != func2->calling_convention)
1037 /* TODO: handling of unspecified parameters not correct yet */
1039 /* all argument types must be compatible */
1040 function_parameter_t *parameter1 = func1->parameters;
1041 function_parameter_t *parameter2 = func2->parameters;
1042 for ( ; parameter1 != NULL && parameter2 != NULL;
1043 parameter1 = parameter1->next, parameter2 = parameter2->next) {
1044 type_t *parameter1_type = skip_typeref(parameter1->type);
1045 type_t *parameter2_type = skip_typeref(parameter2->type);
1047 parameter1_type = get_unqualified_type(parameter1_type);
1048 parameter2_type = get_unqualified_type(parameter2_type);
1050 if (!types_compatible(parameter1_type, parameter2_type))
1053 /* same number of arguments? */
1054 if (parameter1 != NULL || parameter2 != NULL)
1061 * Check if two array types are compatible.
1063 static bool array_types_compatible(const array_type_t *array1,
1064 const array_type_t *array2)
1066 type_t *element_type1 = skip_typeref(array1->element_type);
1067 type_t *element_type2 = skip_typeref(array2->element_type);
1068 if (!types_compatible(element_type1, element_type2))
1071 if (!array1->size_constant || !array2->size_constant)
1074 return array1->size == array2->size;
1078 * Check if two types are compatible.
1080 bool types_compatible(const type_t *type1, const type_t *type2)
1082 assert(!is_typeref(type1));
1083 assert(!is_typeref(type2));
1085 /* shortcut: the same type is always compatible */
1089 if (!is_type_valid(type1) || !is_type_valid(type2))
1092 if (type1->base.qualifiers != type2->base.qualifiers)
1094 if (type1->kind != type2->kind)
1097 switch (type1->kind) {
1099 return function_types_compatible(&type1->function, &type2->function);
1101 return type1->atomic.akind == type2->atomic.akind;
1103 return type1->complex.akind == type2->complex.akind;
1104 case TYPE_IMAGINARY:
1105 return type1->imaginary.akind == type2->imaginary.akind;
1107 return array_types_compatible(&type1->array, &type2->array);
1109 case TYPE_POINTER: {
1110 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1111 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1112 return types_compatible(to1, to2);
1115 case TYPE_COMPOUND_STRUCT:
1116 case TYPE_COMPOUND_UNION:
1119 /* TODO: not implemented */
1123 /* not sure if this makes sense or is even needed, implement it if you
1124 * really need it! */
1125 panic("type compatibility check for bitfield type");
1128 /* Hmm, the error type should be compatible to all other types */
1131 panic("invalid type found in compatible types");
1134 panic("typerefs not skipped in compatible types?!?");
1137 /* TODO: incomplete */
1142 * Skip all typerefs and return the underlying type.
1144 type_t *skip_typeref(type_t *type)
1146 type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1147 type_modifiers_t modifiers = TYPE_MODIFIER_NONE;
1150 switch (type->kind) {
1153 case TYPE_TYPEDEF: {
1154 qualifiers |= type->base.qualifiers;
1155 modifiers |= type->base.modifiers;
1156 const typedef_type_t *typedef_type = &type->typedeft;
1157 if (typedef_type->resolved_type != NULL) {
1158 type = typedef_type->resolved_type;
1161 type = typedef_type->declaration->type;
1165 const typeof_type_t *typeof_type = &type->typeoft;
1166 if (typeof_type->typeof_type != NULL) {
1167 type = typeof_type->typeof_type;
1169 type = typeof_type->expression->base.type;
1179 if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1180 type_t *const copy = duplicate_type(type);
1182 /* for const with typedefed array type the element type has to be
1184 if (is_type_array(copy)) {
1185 type_t *element_type = copy->array.element_type;
1186 element_type = duplicate_type(element_type);
1187 element_type->base.qualifiers |= qualifiers;
1188 element_type->base.modifiers |= modifiers;
1189 copy->array.element_type = element_type;
1191 copy->base.qualifiers |= qualifiers;
1192 copy->base.modifiers |= modifiers;
1195 type = typehash_insert(copy);
1197 obstack_free(type_obst, copy);
1204 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1206 assert(kind <= ATOMIC_TYPE_LAST);
1207 return atomic_type_properties[kind].size;
1210 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1212 assert(kind <= ATOMIC_TYPE_LAST);
1213 return atomic_type_properties[kind].alignment;
1216 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1218 assert(kind <= ATOMIC_TYPE_LAST);
1219 return atomic_type_properties[kind].flags;
1222 atomic_type_kind_t get_intptr_kind(void)
1224 if (machine_size <= 32)
1225 return ATOMIC_TYPE_INT;
1226 else if (machine_size <= 64)
1227 return ATOMIC_TYPE_LONG;
1229 return ATOMIC_TYPE_LONGLONG;
1232 atomic_type_kind_t get_uintptr_kind(void)
1234 if (machine_size <= 32)
1235 return ATOMIC_TYPE_UINT;
1236 else if (machine_size <= 64)
1237 return ATOMIC_TYPE_ULONG;
1239 return ATOMIC_TYPE_ULONGLONG;
1243 * Find the atomic type kind representing a given size (signed).
1245 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1246 static atomic_type_kind_t kinds[32];
1249 atomic_type_kind_t kind = kinds[size];
1250 if (kind == ATOMIC_TYPE_INVALID) {
1251 static const atomic_type_kind_t possible_kinds[] = {
1256 ATOMIC_TYPE_LONGLONG
1258 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1259 if (get_atomic_type_size(possible_kinds[i]) == size) {
1260 kind = possible_kinds[i];
1270 * Find the atomic type kind representing a given size (signed).
1272 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1273 static atomic_type_kind_t kinds[32];
1276 atomic_type_kind_t kind = kinds[size];
1277 if (kind == ATOMIC_TYPE_INVALID) {
1278 static const atomic_type_kind_t possible_kinds[] = {
1283 ATOMIC_TYPE_ULONGLONG
1285 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1286 if (get_atomic_type_size(possible_kinds[i]) == size) {
1287 kind = possible_kinds[i];
1297 * Hash the given type and return the "singleton" version
1300 static type_t *identify_new_type(type_t *type)
1302 type_t *result = typehash_insert(type);
1303 if (result != type) {
1304 obstack_free(type_obst, type);
1310 * Creates a new atomic type.
1312 * @param akind The kind of the atomic type.
1313 * @param qualifiers Type qualifiers for the new type.
1315 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1317 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1318 memset(type, 0, sizeof(atomic_type_t));
1320 type->kind = TYPE_ATOMIC;
1321 type->base.size = get_atomic_type_size(akind);
1322 type->base.alignment = get_atomic_type_alignment(akind);
1323 type->base.qualifiers = qualifiers;
1324 type->atomic.akind = akind;
1326 return identify_new_type(type);
1330 * Creates a new complex type.
1332 * @param akind The kind of the atomic type.
1333 * @param qualifiers Type qualifiers for the new type.
1335 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1337 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1338 memset(type, 0, sizeof(complex_type_t));
1340 type->kind = TYPE_COMPLEX;
1341 type->base.qualifiers = qualifiers;
1342 type->base.alignment = get_atomic_type_alignment(akind);
1343 type->complex.akind = akind;
1345 return identify_new_type(type);
1349 * Creates a new imaginary type.
1351 * @param akind The kind of the atomic type.
1352 * @param qualifiers Type qualifiers for the new type.
1354 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1356 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1357 memset(type, 0, sizeof(imaginary_type_t));
1359 type->kind = TYPE_IMAGINARY;
1360 type->base.qualifiers = qualifiers;
1361 type->base.alignment = get_atomic_type_alignment(akind);
1362 type->imaginary.akind = akind;
1364 return identify_new_type(type);
1368 * Creates a new pointer type.
1370 * @param points_to The points-to type for the new type.
1371 * @param qualifiers Type qualifiers for the new type.
1373 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1375 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1376 memset(type, 0, sizeof(pointer_type_t));
1378 type->kind = TYPE_POINTER;
1379 type->base.qualifiers = qualifiers;
1380 type->base.alignment = 0;
1381 type->pointer.points_to = points_to;
1383 return identify_new_type(type);
1386 type_t *make_array_type(type_t *element_type, size_t size,
1387 type_qualifiers_t qualifiers)
1389 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1390 memset(type, 0, sizeof(array_type_t));
1392 type->kind = TYPE_ARRAY;
1393 type->base.qualifiers = qualifiers;
1394 type->base.alignment = 0;
1395 type->array.element_type = element_type;
1396 type->array.size = size;
1397 type->array.size_constant = true;
1399 return identify_new_type(type);
1403 * Debug helper. Prints the given type to stdout.
1405 static __attribute__((unused))
1406 void dbg_type(const type_t *type)
1408 FILE *old_out = out;