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;
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_LONGLONG].alignment = 4;
173 props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
175 props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UINT];
178 void exit_types(void)
180 obstack_free(type_obst, NULL);
183 void type_set_output(FILE *stream)
188 void inc_type_visited(void)
193 void print_type_qualifiers(type_qualifiers_t qualifiers)
195 if(qualifiers & TYPE_QUALIFIER_CONST) fputs("const ", out);
196 if(qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out);
197 if(qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out);
201 * Prints the name of an atomic type kinds.
203 * @param kind The type kind.
206 void print_atomic_kinds(atomic_type_kind_t kind)
208 const char *s = "INVALIDATOMIC";
210 case ATOMIC_TYPE_INVALID: break;
211 case ATOMIC_TYPE_VOID: s = "void"; break;
212 case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
213 case ATOMIC_TYPE_CHAR: s = "char"; break;
214 case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
215 case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
216 case ATOMIC_TYPE_INT: s = "int"; break;
217 case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
218 case ATOMIC_TYPE_SHORT: s = "short"; break;
219 case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
220 case ATOMIC_TYPE_LONG: s = "long"; break;
221 case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
222 case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
223 case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
224 case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break;
225 case ATOMIC_TYPE_FLOAT: s = "float"; break;
226 case ATOMIC_TYPE_DOUBLE: s = "double"; break;
232 * Prints the name of an atomic type.
234 * @param type The type.
237 void print_atomic_type(const atomic_type_t *type)
239 print_type_qualifiers(type->base.qualifiers);
240 print_atomic_kinds(type->akind);
244 * Prints the name of a complex type.
246 * @param type The type.
249 void print_complex_type(const complex_type_t *type)
251 print_type_qualifiers(type->base.qualifiers);
252 fputs("_Complex ", out);
253 print_atomic_kinds(type->akind);
257 * Prints the name of an imaginary type.
259 * @param type The type.
262 void print_imaginary_type(const imaginary_type_t *type)
264 print_type_qualifiers(type->base.qualifiers);
265 fputs("_Imaginary ", out);
266 print_atomic_kinds(type->akind);
270 * Print the first part (the prefix) of a type.
272 * @param type The type to print.
273 * @param top true, if this is the top type, false if it's an embedded type.
275 static void print_function_type_pre(const function_type_t *type, bool top)
277 print_type_qualifiers(type->base.qualifiers);
279 intern_print_type_pre(type->return_type, false);
281 /* don't emit braces if we're the toplevel type... */
287 * Print the second part (the postfix) of a type.
289 * @param type The type to print.
290 * @param top true, if this is the top type, false if it's an embedded type.
292 static void print_function_type_post(const function_type_t *type,
293 const scope_t *scope, bool top)
295 intern_print_type_post(type->return_type, false);
296 /* don't emit braces if we're the toplevel type... */
304 function_parameter_t *parameter = type->parameters;
305 for( ; parameter != NULL; parameter = parameter->next) {
311 print_type(parameter->type);
314 declaration_t *parameter = scope->declarations;
315 for( ; parameter != NULL; parameter = parameter->next) {
321 print_type_ext(parameter->type, parameter->symbol,
333 if(first && !type->unspecified_parameters) {
340 * Prints the prefix part of a pointer type.
342 * @param type The pointer type.
344 static void print_pointer_type_pre(const pointer_type_t *type)
346 intern_print_type_pre(type->points_to, false);
348 print_type_qualifiers(type->base.qualifiers);
352 * Prints the postfix part of a pointer type.
354 * @param type The pointer type.
356 static void print_pointer_type_post(const pointer_type_t *type)
358 intern_print_type_post(type->points_to, false);
362 * Prints the prefix part of an array type.
364 * @param type The array type.
366 static void print_array_type_pre(const array_type_t *type)
368 intern_print_type_pre(type->element_type, false);
372 * Prints the postfix part of an array type.
374 * @param type The array type.
376 static void print_array_type_post(const array_type_t *type)
379 if(type->is_static) {
380 fputs("static ", out);
382 print_type_qualifiers(type->base.qualifiers);
383 if(type->size_expression != NULL
384 && (print_implicit_array_size || !type->has_implicit_size)) {
385 print_expression(type->size_expression);
388 intern_print_type_post(type->element_type, false);
392 * Prints the postfix part of a bitfield type.
394 * @param type The array type.
396 static void print_bitfield_type_post(const bitfield_type_t *type)
399 print_expression(type->size);
400 intern_print_type_post(type->base_type, false);
404 * Prints an enum definition.
406 * @param declaration The enum's type declaration.
408 void print_enum_definition(const declaration_t *declaration)
414 declaration_t *entry = declaration->next;
415 for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
416 entry = entry->next) {
419 fprintf(out, "%s", entry->symbol->string);
420 if(entry->init.initializer != NULL) {
423 /* skip the implicit cast */
424 expression_t *expression = entry->init.enum_value;
425 if(expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
426 expression = expression->unary.value;
428 print_expression(expression);
439 * Prints an enum type.
441 * @param type The enum type.
443 static void print_type_enum(const enum_type_t *type)
445 print_type_qualifiers(type->base.qualifiers);
448 declaration_t *declaration = type->declaration;
449 symbol_t *symbol = declaration->symbol;
451 fputs(symbol->string, out);
453 print_enum_definition(declaration);
458 * Print the compound part of a compound type.
460 * @param declaration The declaration of the compound type.
462 void print_compound_definition(const declaration_t *declaration)
467 declaration_t *iter = declaration->scope.declarations;
468 for( ; iter != NULL; iter = iter->next) {
470 print_declaration(iter);
480 * Prints a compound type.
482 * @param type The compound type.
484 static void print_compound_type(const compound_type_t *type)
486 print_type_qualifiers(type->base.qualifiers);
488 if(type->base.kind == TYPE_COMPOUND_STRUCT) {
489 fputs("struct ", out);
491 assert(type->base.kind == TYPE_COMPOUND_UNION);
492 fputs("union ", out);
495 declaration_t *declaration = type->declaration;
496 symbol_t *symbol = declaration->symbol;
498 fputs(symbol->string, out);
500 print_compound_definition(declaration);
505 * Prints the prefix part of a typedef type.
507 * @param type The typedef type.
509 static void print_typedef_type_pre(const typedef_type_t *const type)
511 print_type_qualifiers(type->base.qualifiers);
512 fputs(type->declaration->symbol->string, out);
516 * Prints the prefix part of a typeof type.
518 * @param type The typeof type.
520 static void print_typeof_type_pre(const typeof_type_t *const type)
522 fputs("typeof(", out);
523 if(type->expression != NULL) {
524 assert(type->typeof_type == NULL);
525 print_expression(type->expression);
527 print_type(type->typeof_type);
533 * Prints the prefix part of a type.
535 * @param type The type.
536 * @param top true if we print the toplevel type, false else.
538 static void intern_print_type_pre(const type_t *const type, const bool top)
542 fputs("<error>", out);
544 fputs("<invalid>", out);
547 print_type_enum(&type->enumt);
550 print_atomic_type(&type->atomic);
553 print_complex_type(&type->complex);
556 print_imaginary_type(&type->imaginary);
558 case TYPE_COMPOUND_STRUCT:
559 case TYPE_COMPOUND_UNION:
560 print_compound_type(&type->compound);
563 fputs(type->builtin.symbol->string, out);
566 print_function_type_pre(&type->function, top);
569 print_pointer_type_pre(&type->pointer);
572 intern_print_type_pre(type->bitfield.base_type, top);
575 print_array_type_pre(&type->array);
578 print_typedef_type_pre(&type->typedeft);
581 print_typeof_type_pre(&type->typeoft);
584 fputs("unknown", out);
588 * Prints the postfix part of a type.
590 * @param type The type.
591 * @param top true if we print the toplevel type, false else.
593 static void intern_print_type_post(const type_t *const type, const bool top)
597 print_function_type_post(&type->function, NULL, top);
600 print_pointer_type_post(&type->pointer);
603 print_array_type_post(&type->array);
606 print_bitfield_type_post(&type->bitfield);
614 case TYPE_COMPOUND_STRUCT:
615 case TYPE_COMPOUND_UNION:
626 * @param type The type.
628 void print_type(const type_t *const type)
630 print_type_ext(type, NULL, NULL);
633 void print_type_ext(const type_t *const type, const symbol_t *symbol,
634 const scope_t *scope)
637 fputs("nil type", out);
641 intern_print_type_pre(type, true);
644 fputs(symbol->string, out);
646 if(type->kind == TYPE_FUNCTION) {
647 print_function_type_post(&type->function, scope, true);
649 intern_print_type_post(type, true);
654 * Return the size of a type AST node.
656 * @param type The type.
658 static size_t get_type_size(const type_t *type)
661 case TYPE_ATOMIC: return sizeof(atomic_type_t);
662 case TYPE_COMPLEX: return sizeof(complex_type_t);
663 case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
664 case TYPE_COMPOUND_STRUCT:
665 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
666 case TYPE_ENUM: return sizeof(enum_type_t);
667 case TYPE_FUNCTION: return sizeof(function_type_t);
668 case TYPE_POINTER: return sizeof(pointer_type_t);
669 case TYPE_ARRAY: return sizeof(array_type_t);
670 case TYPE_BUILTIN: return sizeof(builtin_type_t);
671 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
672 case TYPE_TYPEOF: return sizeof(typeof_type_t);
673 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
674 case TYPE_ERROR: panic("error type found");
675 case TYPE_INVALID: panic("invalid type found");
677 panic("unknown type found");
683 * @param type The type to copy.
684 * @return A copy of the type.
686 * @note This does not produce a deep copy!
688 type_t *duplicate_type(const type_t *type)
690 size_t size = get_type_size(type);
692 type_t *copy = obstack_alloc(type_obst, size);
693 memcpy(copy, type, size);
699 * Returns the unqualified type of a given type.
701 * @param type The type.
702 * @returns The unqualified type.
704 type_t *get_unqualified_type(type_t *type)
706 if(type->base.qualifiers == TYPE_QUALIFIER_NONE)
709 type_t *unqualified_type = duplicate_type(type);
710 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
712 type_t *result = typehash_insert(unqualified_type);
713 if(result != unqualified_type) {
714 obstack_free(type_obst, unqualified_type);
721 * Check if a type is valid.
723 * @param type The type to check.
724 * @return true if type represents a valid type.
726 bool type_valid(const type_t *type)
728 return type->kind != TYPE_INVALID;
731 static bool test_atomic_type_flag(atomic_type_kind_t kind,
732 atomic_type_flag_t flag)
734 assert(kind <= ATOMIC_TYPE_LAST);
735 return (atomic_type_properties[kind].flags & flag) != 0;
739 * Returns true if the given type is an integer type.
741 * @param type The type to check.
742 * @return True if type is an integer type.
744 bool is_type_integer(const type_t *type)
746 assert(!is_typeref(type));
748 if(type->kind == TYPE_ENUM)
751 if(type->kind != TYPE_ATOMIC)
754 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
758 * Returns true if the given type is an floating point type.
760 * @param type The type to check.
761 * @return True if type is a floating point type.
763 bool is_type_float(const type_t *type)
765 assert(!is_typeref(type));
767 if(type->kind != TYPE_ATOMIC)
770 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
774 * Returns true if the given type is a signed type.
776 * @param type The type to check.
777 * @return True if type is a signed type.
779 bool is_type_signed(const type_t *type)
781 assert(!is_typeref(type));
783 /* enum types are int for now */
784 if(type->kind == TYPE_ENUM)
787 if(type->kind != TYPE_ATOMIC)
790 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
794 * Returns true if the given type represents an arithmetic type.
796 * @param type The type to check.
797 * @return True if type represents an arithmetic type.
799 bool is_type_arithmetic(const type_t *type)
801 assert(!is_typeref(type));
808 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
810 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
812 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
819 * Returns true if the given type represents a scalar type.
821 * @param type The type to check.
822 * @return True if type represents a scalar type.
824 bool is_type_scalar(const type_t *type)
826 assert(!is_typeref(type));
828 switch (type->kind) {
829 case TYPE_POINTER: return true;
830 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
834 return is_type_arithmetic(type);
838 * Check if a given type is incomplete.
840 * @param type The type to check.
841 * @return True if the given type is incomplete (ie. just forward).
843 bool is_type_incomplete(const type_t *type)
845 assert(!is_typeref(type));
848 case TYPE_COMPOUND_STRUCT:
849 case TYPE_COMPOUND_UNION: {
850 const compound_type_t *compound_type = &type->compound;
851 declaration_t *declaration = compound_type->declaration;
852 return !declaration->init.complete;
855 const enum_type_t *enum_type = &type->enumt;
856 declaration_t *declaration = enum_type->declaration;
857 return !declaration->init.complete;
864 return type->array.size_expression == NULL;
867 return type->atomic.akind == ATOMIC_TYPE_VOID;
870 return type->complex.akind == ATOMIC_TYPE_VOID;
873 return type->imaginary.akind == ATOMIC_TYPE_VOID;
882 panic("is_type_incomplete called without typerefs skipped");
887 panic("invalid type found");
891 * Check if two function types are compatible.
893 static bool function_types_compatible(const function_type_t *func1,
894 const function_type_t *func2)
896 const type_t* const ret1 = skip_typeref(func1->return_type);
897 const type_t* const ret2 = skip_typeref(func2->return_type);
898 if (!types_compatible(ret1, ret2))
901 /* can parameters be compared? */
902 if(func1->unspecified_parameters || func2->unspecified_parameters)
905 if(func1->variadic != func2->variadic)
908 /* TODO: handling of unspecified parameters not correct yet */
910 /* all argument types must be compatible */
911 function_parameter_t *parameter1 = func1->parameters;
912 function_parameter_t *parameter2 = func2->parameters;
913 for( ; parameter1 != NULL && parameter2 != NULL;
914 parameter1 = parameter1->next, parameter2 = parameter2->next) {
915 type_t *parameter1_type = skip_typeref(parameter1->type);
916 type_t *parameter2_type = skip_typeref(parameter2->type);
918 parameter1_type = get_unqualified_type(parameter1_type);
919 parameter2_type = get_unqualified_type(parameter2_type);
921 if(!types_compatible(parameter1_type, parameter2_type))
924 /* same number of arguments? */
925 if(parameter1 != NULL || parameter2 != NULL)
932 * Check if two array types are compatible.
934 static bool array_types_compatible(const array_type_t *array1,
935 const array_type_t *array2)
937 type_t *element_type1 = skip_typeref(array1->element_type);
938 type_t *element_type2 = skip_typeref(array2->element_type);
939 if(!types_compatible(element_type1, element_type2))
942 if(!array1->size_constant || !array2->size_constant)
945 return array1->size == array2->size;
949 * Check if two types are compatible.
951 bool types_compatible(const type_t *type1, const type_t *type2)
953 assert(!is_typeref(type1));
954 assert(!is_typeref(type2));
956 /* shortcut: the same type is always compatible */
960 if(type1->base.qualifiers != type2->base.qualifiers)
962 if(type1->kind != type2->kind)
965 switch(type1->kind) {
967 return function_types_compatible(&type1->function, &type2->function);
969 return type1->atomic.akind == type2->atomic.akind;
971 return type1->complex.akind == type2->complex.akind;
973 return type1->imaginary.akind == type2->imaginary.akind;
975 return array_types_compatible(&type1->array, &type2->array);
978 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
979 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
980 return types_compatible(to1, to2);
983 case TYPE_COMPOUND_STRUCT:
984 case TYPE_COMPOUND_UNION:
987 /* TODO: not implemented */
991 /* not sure if this makes sense or is even needed, implement it if you
993 panic("type compatibility check for bitfield type");
996 /* Hmm, the error type should be compatible to all other types */
999 panic("invalid type found in compatible types");
1002 panic("typerefs not skipped in compatible types?!?");
1005 /* TODO: incomplete */
1010 * Check if two pointer types are compatible.
1012 bool pointers_compatible(const type_t *type1, const type_t *type2)
1014 assert(!is_typeref(type1));
1015 assert(!is_typeref(type2));
1017 assert(type1->kind == TYPE_POINTER);
1018 assert(type2->kind == TYPE_POINTER);
1026 * Skip all typerefs and return the underlying type.
1028 type_t *skip_typeref(type_t *type)
1030 unsigned qualifiers = TYPE_QUALIFIER_NONE;
1033 switch(type->kind) {
1036 case TYPE_TYPEDEF: {
1037 qualifiers |= type->base.qualifiers;
1038 const typedef_type_t *typedef_type = &type->typedeft;
1039 if(typedef_type->resolved_type != NULL) {
1040 type = typedef_type->resolved_type;
1043 type = typedef_type->declaration->type;
1047 const typeof_type_t *typeof_type = &type->typeoft;
1048 if(typeof_type->typeof_type != NULL) {
1049 type = typeof_type->typeof_type;
1051 type = typeof_type->expression->base.type;
1061 if (qualifiers != TYPE_QUALIFIER_NONE) {
1062 type_t *const copy = duplicate_type(type);
1063 copy->base.qualifiers |= qualifiers;
1065 type = typehash_insert(copy);
1067 obstack_free(type_obst, copy);
1074 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1076 assert(kind <= ATOMIC_TYPE_LAST);
1077 return atomic_type_properties[kind].size;
1080 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1082 assert(kind <= ATOMIC_TYPE_LAST);
1083 return atomic_type_properties[kind].alignment;
1086 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1088 assert(kind <= ATOMIC_TYPE_LAST);
1089 return atomic_type_properties[kind].flags;
1092 atomic_type_kind_t get_intptr_kind(void)
1094 if(machine_size <= 32)
1095 return ATOMIC_TYPE_INT;
1096 else if(machine_size <= 64)
1097 return ATOMIC_TYPE_LONG;
1099 return ATOMIC_TYPE_LONGLONG;
1102 atomic_type_kind_t get_uintptr_kind(void)
1104 if(machine_size <= 32)
1105 return ATOMIC_TYPE_UINT;
1106 else if(machine_size <= 64)
1107 return ATOMIC_TYPE_ULONG;
1109 return ATOMIC_TYPE_ULONGLONG;
1113 * Find the atomic type kind representing a given size (signed).
1115 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1116 static atomic_type_kind_t kinds[32];
1119 atomic_type_kind_t kind = kinds[size];
1120 if(kind == ATOMIC_TYPE_INVALID) {
1121 static const atomic_type_kind_t possible_kinds[] = {
1126 ATOMIC_TYPE_LONGLONG
1128 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1129 if(get_atomic_type_size(possible_kinds[i]) == size) {
1130 kind = possible_kinds[i];
1140 * Find the atomic type kind representing a given size (signed).
1142 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1143 static atomic_type_kind_t kinds[32];
1146 atomic_type_kind_t kind = kinds[size];
1147 if(kind == ATOMIC_TYPE_INVALID) {
1148 static const atomic_type_kind_t possible_kinds[] = {
1153 ATOMIC_TYPE_ULONGLONG
1155 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1156 if(get_atomic_type_size(possible_kinds[i]) == size) {
1157 kind = possible_kinds[i];
1167 * Hash the given type and return the "singleton" version
1170 static type_t *identify_new_type(type_t *type)
1172 type_t *result = typehash_insert(type);
1173 if(result != type) {
1174 obstack_free(type_obst, type);
1180 * Creates a new atomic type.
1182 * @param akind The kind of the atomic type.
1183 * @param qualifiers Type qualifiers for the new type.
1185 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1187 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1188 memset(type, 0, sizeof(atomic_type_t));
1190 type->kind = TYPE_ATOMIC;
1191 type->base.qualifiers = qualifiers;
1192 type->base.alignment = get_atomic_type_alignment(akind);
1193 type->atomic.akind = akind;
1195 return identify_new_type(type);
1199 * Creates a new complex type.
1201 * @param akind The kind of the atomic type.
1202 * @param qualifiers Type qualifiers for the new type.
1204 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1206 type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1207 memset(type, 0, sizeof(complex_type_t));
1209 type->kind = TYPE_COMPLEX;
1210 type->base.qualifiers = qualifiers;
1211 type->base.alignment = get_atomic_type_alignment(akind);
1212 type->complex.akind = akind;
1214 return identify_new_type(type);
1218 * Creates a new imaginary type.
1220 * @param akind The kind of the atomic type.
1221 * @param qualifiers Type qualifiers for the new type.
1223 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1225 type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1226 memset(type, 0, sizeof(imaginary_type_t));
1228 type->kind = TYPE_IMAGINARY;
1229 type->base.qualifiers = qualifiers;
1230 type->base.alignment = get_atomic_type_alignment(akind);
1231 type->imaginary.akind = akind;
1233 return identify_new_type(type);
1237 * Creates a new pointer type.
1239 * @param points_to The points-to type for the new type.
1240 * @param qualifiers Type qualifiers for the new type.
1242 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1244 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1245 memset(type, 0, sizeof(pointer_type_t));
1247 type->kind = TYPE_POINTER;
1248 type->base.qualifiers = qualifiers;
1249 type->base.alignment = 0;
1250 type->pointer.points_to = points_to;
1252 return identify_new_type(type);
1255 type_t *make_array_type(type_t *element_type, size_t size,
1256 type_qualifiers_t qualifiers)
1258 type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1259 memset(type, 0, sizeof(array_type_t));
1261 type->kind = TYPE_ARRAY;
1262 type->base.qualifiers = qualifiers;
1263 type->base.alignment = 0;
1264 type->array.element_type = element_type;
1265 type->array.size = size;
1266 type->array.size_constant = true;
1268 return identify_new_type(type);
1272 * Debug helper. Prints the given type to stdout.
1274 static __attribute__((unused))
1275 void dbg_type(const type_t *type)
1277 FILE *old_out = out;