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
24 #include "type_hash.h"
26 #include "adt/error.h"
31 #define HashSet type_hash_t
32 #define HashSetIterator type_hash_iterator_t
33 #define ValueType type_t*
34 #include "adt/hashset.h"
36 #undef HashSetIterator
39 /* TODO: ^= is a bad way of combining hashes since most addresses are very
42 static unsigned hash_ptr(const void *ptr)
44 unsigned ptr_int = ((char*) ptr - (char*) NULL);
48 static unsigned hash_atomic_type(const atomic_type_t *type)
50 unsigned some_prime = 27644437;
51 unsigned result = type->akind * some_prime;
56 static unsigned hash_pointer_type(const pointer_type_t *type)
58 return hash_ptr(type->points_to);
61 static unsigned hash_array_type(const array_type_t *type)
63 return hash_ptr(type->element_type);
66 static unsigned hash_compound_type(const compound_type_t *type)
68 return hash_ptr(type->declaration);
71 static unsigned hash_type(const type_t *type);
73 static unsigned hash_function_type(const function_type_t *type)
75 unsigned result = hash_ptr(type->return_type);
77 function_parameter_t *parameter = type->parameters;
78 while(parameter != NULL) {
79 result ^= hash_ptr(parameter->type);
80 parameter = parameter->next;
86 static unsigned hash_enum_type(const enum_type_t *type)
88 return hash_ptr(type->declaration);
91 static unsigned hash_typeof_type(const typeof_type_t *type)
93 unsigned result = hash_ptr(type->expression);
94 result ^= hash_ptr(type->typeof_type);
99 static unsigned hash_bitfield_type(const bitfield_type_t *type)
101 unsigned result = hash_ptr(type->base_type);
107 static unsigned hash_type(const type_t *type)
113 panic("internalizing void or invalid types not possible");
118 hash = hash_atomic_type(&type->atomic);
121 hash = hash_enum_type(&type->enumt);
123 case TYPE_COMPOUND_STRUCT:
124 case TYPE_COMPOUND_UNION:
125 hash = hash_compound_type(&type->compound);
128 hash = hash_function_type(&type->function);
131 hash = hash_pointer_type(&type->pointer);
134 hash = hash_array_type(&type->array);
137 hash = hash_ptr(type->builtin.symbol);
140 hash = hash_ptr(type->typedeft.declaration);
143 hash = hash_typeof_type(&type->typeoft);
146 hash = hash_bitfield_type(&type->bitfield);
150 unsigned some_prime = 99991;
151 hash ^= some_prime * type->base.qualifiers;
156 static bool atomic_types_equal(const atomic_type_t *type1,
157 const atomic_type_t *type2)
159 return type1->akind == type2->akind;
162 static bool function_types_equal(const function_type_t *type1,
163 const function_type_t *type2)
165 if(type1->return_type != type2->return_type)
167 if(type1->variadic != type2->variadic)
169 if(type1->unspecified_parameters != type2->unspecified_parameters)
171 if(type1->kr_style_parameters != type2->kr_style_parameters)
174 function_parameter_t *param1 = type1->parameters;
175 function_parameter_t *param2 = type2->parameters;
176 while(param1 != NULL && param2 != NULL) {
177 if(param1->type != param2->type)
179 param1 = param1->next;
180 param2 = param2->next;
182 if(param1 != NULL || param2 != NULL)
188 static bool pointer_types_equal(const pointer_type_t *type1,
189 const pointer_type_t *type2)
191 return type1->points_to == type2->points_to;
194 static bool array_types_equal(const array_type_t *type1,
195 const array_type_t *type2)
197 if(type1->element_type != type2->element_type)
199 if(type1->is_variable != type2->is_variable)
201 if(type1->is_static != type2->is_static)
203 if(type1->size_constant != type2->size_constant)
206 /* never identify vla types, because we need them for caching calculated
207 * sizes later in ast2firm */
208 if(type1->is_vla || type2->is_vla)
211 /* TODO: compare size expressions for equality... */
216 static bool builtin_types_equal(const builtin_type_t *type1,
217 const builtin_type_t *type2)
219 return type1->symbol == type2->symbol;
222 static bool compound_types_equal(const compound_type_t *type1,
223 const compound_type_t *type2)
225 return type1->declaration == type2->declaration;
228 static bool enum_types_equal(const enum_type_t *type1,
229 const enum_type_t *type2)
231 return type1->declaration == type2->declaration;
234 static bool typedef_types_equal(const typedef_type_t *type1,
235 const typedef_type_t *type2)
237 return type1->declaration == type2->declaration;
240 static bool typeof_types_equal(const typeof_type_t *type1,
241 const typeof_type_t *type2)
243 if(type1->expression != type2->expression)
245 if(type1->typeof_type != type2->typeof_type)
251 static bool bitfield_types_equal(const bitfield_type_t *type1,
252 const bitfield_type_t *type2)
254 if(type1->base_type != type2->base_type)
256 /* TODO: compare size expression */
260 static bool types_equal(const type_t *type1, const type_t *type2)
264 if(type1->kind != type2->kind)
266 if(type1->base.qualifiers != type2->base.qualifiers)
269 switch(type1->kind) {
271 /* Hmm, the error type is never equal */
276 return atomic_types_equal(&type1->atomic, &type2->atomic);
278 return enum_types_equal(&type1->enumt, &type2->enumt);
279 case TYPE_COMPOUND_STRUCT:
280 case TYPE_COMPOUND_UNION:
281 return compound_types_equal(&type1->compound, &type2->compound);
283 return function_types_equal(&type1->function, &type2->function);
285 return pointer_types_equal(&type1->pointer, &type2->pointer);
287 return array_types_equal(&type1->array, &type2->array);
289 return builtin_types_equal(&type1->builtin, &type2->builtin);
291 return typeof_types_equal(&type1->typeoft, &type2->typeoft);
293 return typedef_types_equal(&type1->typedeft, &type2->typedeft);
295 return bitfield_types_equal(&type1->bitfield, &type2->bitfield);
301 #define HashSet type_hash_t
302 #define HashSetIterator type_hash_iterator_t
303 #define ValueType type_t*
304 #define NullValue NULL
305 #define DeletedValue ((type_t*)-1)
306 #define Hash(this, key) hash_type(key)
307 #define KeysEqual(this,key1,key2) types_equal(key1, key2)
308 #define SetRangeEmpty(ptr,size) memset(ptr, 0, (size) * sizeof(*(ptr)))
310 #define hashset_init _typehash_init
311 #define hashset_init_size _typehash_init_size
312 #define hashset_destroy _typehash_destroy
313 #define hashset_insert _typehash_insert
314 #define hashset_remove typehash_remove
315 #define hashset_find typehash_find
316 #define hashset_size typehash_size
317 #define hashset_iterator_init typehash_iterator_init
318 #define hashset_iterator_next typehash_iterator_next
319 #define hashset_remove_iterator typehash_remove_iterator
321 #include "adt/hashset.c"
323 static type_hash_t typehash;
325 void init_typehash(void)
327 _typehash_init(&typehash);
330 void exit_typehash(void)
332 _typehash_destroy(&typehash);
335 type_t *typehash_insert(type_t *type)
337 return _typehash_insert(&typehash, type);