2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 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 typedef struct type_hash_iterator_t type_hash_iterator_t;
40 typedef struct type_hash_t type_hash_t;
42 /* TODO: ^= is a bad way of combining hashes since most addresses are very
45 static unsigned hash_ptr(const void *ptr)
47 unsigned ptr_int = ((char*) ptr - (char*) NULL);
51 static unsigned hash_atomic_type(const atomic_type_t *type)
53 unsigned some_prime = 27644437;
54 unsigned result = type->akind * some_prime;
59 static unsigned hash_pointer_type(const pointer_type_t *type)
61 return hash_ptr(type->points_to) ^ hash_ptr(type->base_variable);
64 static unsigned hash_reference_type(const reference_type_t *type)
66 return hash_ptr(type->refers_to);
69 static unsigned hash_array_type(const array_type_t *type)
71 return hash_ptr(type->element_type);
74 static unsigned hash_compound_type(const compound_type_t *type)
76 return hash_ptr(type->compound);
79 static unsigned hash_function_type(const function_type_t *type)
81 unsigned result = hash_ptr(type->return_type);
83 function_parameter_t *parameter = type->parameters;
84 while (parameter != NULL) {
85 result ^= hash_ptr(parameter->type);
86 parameter = parameter->next;
88 result += type->modifiers;
89 result += type->linkage;
90 result += type->calling_convention;
95 static unsigned hash_enum_type(const enum_type_t *type)
97 return hash_ptr(type->enume);
100 static unsigned hash_typeof_type(const typeof_type_t *type)
102 unsigned result = hash_ptr(type->expression);
103 result ^= hash_ptr(type->typeof_type);
108 static unsigned hash_type(const type_t *type)
112 switch (type->kind) {
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_reference_type(&type->reference);
137 hash = hash_array_type(&type->array);
140 hash = hash_ptr(type->typedeft.typedefe);
143 hash = hash_typeof_type(&type->typeoft);
147 unsigned some_prime = 99991;
148 hash ^= some_prime * type->base.qualifiers;
153 static bool atomic_types_equal(const atomic_type_t *type1,
154 const atomic_type_t *type2)
156 return type1->akind == type2->akind;
159 static bool function_types_equal(const function_type_t *type1,
160 const function_type_t *type2)
162 if (type1->return_type != type2->return_type)
164 if (type1->variadic != type2->variadic)
166 if (type1->unspecified_parameters != type2->unspecified_parameters)
168 if (type1->kr_style_parameters != type2->kr_style_parameters)
170 if (type1->linkage != type2->linkage)
172 if (type1->modifiers != type2->modifiers)
174 if (type1->calling_convention != type2->calling_convention)
177 function_parameter_t *param1 = type1->parameters;
178 function_parameter_t *param2 = type2->parameters;
179 while (param1 != NULL && param2 != NULL) {
180 if (param1->type != param2->type)
182 param1 = param1->next;
183 param2 = param2->next;
185 if (param1 != NULL || param2 != NULL)
191 static bool pointer_types_equal(const pointer_type_t *type1,
192 const pointer_type_t *type2)
194 return type1->points_to == type2->points_to &&
195 type1->base_variable == type2->base_variable;
198 static bool reference_types_equal(const reference_type_t *type1,
199 const reference_type_t *type2)
201 return type1->refers_to == type2->refers_to;
204 static bool array_types_equal(const array_type_t *type1,
205 const array_type_t *type2)
207 if (type1->element_type != type2->element_type)
209 if (type1->is_variable != type2->is_variable)
211 if (type1->is_static != type2->is_static)
213 if (type1->size_constant != type2->size_constant)
216 /* never identify vla types, because we need them for caching calculated
217 * sizes later in ast2firm */
218 if (type1->is_vla || type2->is_vla)
221 /* TODO: compare size expressions for equality... */
226 static bool compound_types_equal(const compound_type_t *type1,
227 const compound_type_t *type2)
229 return type1->compound == type2->compound;
232 static bool enum_types_equal(const enum_type_t *type1,
233 const enum_type_t *type2)
235 return type1->enume == type2->enume;
238 static bool typedef_types_equal(const typedef_type_t *type1,
239 const typedef_type_t *type2)
241 return type1->typedefe == type2->typedefe;
244 static bool typeof_types_equal(const typeof_type_t *type1,
245 const typeof_type_t *type2)
247 if (type1->expression != type2->expression)
249 if (type1->typeof_type != type2->typeof_type)
255 static bool types_equal(const type_t *type1, const type_t *type2)
259 if (type1->kind != type2->kind)
261 if (type1->base.qualifiers != type2->base.qualifiers)
264 switch (type1->kind) {
266 /* Hmm, the error type is never equal */
271 return atomic_types_equal(&type1->atomic, &type2->atomic);
273 return enum_types_equal(&type1->enumt, &type2->enumt);
274 case TYPE_COMPOUND_STRUCT:
275 case TYPE_COMPOUND_UNION:
276 return compound_types_equal(&type1->compound, &type2->compound);
278 return function_types_equal(&type1->function, &type2->function);
280 return pointer_types_equal(&type1->pointer, &type2->pointer);
282 return reference_types_equal(&type1->reference, &type2->reference);
284 return array_types_equal(&type1->array, &type2->array);
286 return typeof_types_equal(&type1->typeoft, &type2->typeoft);
288 return typedef_types_equal(&type1->typedeft, &type2->typedeft);
294 #define HashSet type_hash_t
295 #define HashSetIterator type_hash_iterator_t
296 #define ValueType type_t*
297 #define NullValue NULL
298 #define DeletedValue ((type_t*)-1)
299 #define Hash(this, key) hash_type(key)
300 #define KeysEqual(this,key1,key2) types_equal(key1, key2)
301 #define SetRangeEmpty(ptr,size) memset(ptr, 0, (size) * sizeof(*(ptr)))
303 #define hashset_init _typehash_init
304 #define hashset_init_size _typehash_init_size
305 #define hashset_destroy _typehash_destroy
306 #define hashset_insert _typehash_insert
307 #define hashset_remove typehash_remove
308 #define hashset_find typehash_find
309 #define hashset_size typehash_size
310 #define hashset_iterator_init typehash_iterator_init
311 #define hashset_iterator_next typehash_iterator_next
312 #define hashset_remove_iterator typehash_remove_iterator
313 #define SCALAR_RETURN
315 #include "adt/hashset.c"
317 static type_hash_t typehash;
319 void init_typehash(void)
321 _typehash_init(&typehash);
324 void exit_typehash(void)
326 _typehash_destroy(&typehash);
329 type_t *typehash_insert(type_t *type)
331 return _typehash_insert(&typehash, type);