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 ValueType type_t*
33 #include "adt/hashset.h"
37 typedef struct type_hash_iterator_t type_hash_iterator_t;
38 typedef struct type_hash_t type_hash_t;
40 /* TODO: ^= is a bad way of combining hashes since most addresses are very
43 static unsigned hash_ptr(const void *ptr)
45 unsigned ptr_int = ((char*) ptr - (char*) NULL);
49 static unsigned hash_atomic_type(const atomic_type_t *type)
51 unsigned some_prime = 27644437;
52 unsigned result = type->akind * some_prime;
57 static unsigned hash_pointer_type(const pointer_type_t *type)
59 return hash_ptr(type->points_to) ^ hash_ptr(type->base_variable);
62 static unsigned hash_reference_type(const reference_type_t *type)
64 return hash_ptr(type->refers_to);
67 static unsigned hash_array_type(const array_type_t *type)
69 return hash_ptr(type->element_type);
72 static unsigned hash_compound_type(const compound_type_t *type)
74 return hash_ptr(type->compound);
77 static unsigned hash_function_type(const function_type_t *type)
79 unsigned result = hash_ptr(type->return_type);
81 function_parameter_t *parameter = type->parameters;
82 while (parameter != NULL) {
83 result ^= hash_ptr(parameter->type);
84 parameter = parameter->next;
86 result += type->modifiers;
87 result += type->linkage;
88 result += type->calling_convention;
93 static unsigned hash_enum_type(const enum_type_t *type)
95 return hash_ptr(type->enume);
98 static unsigned hash_typeof_type(const typeof_type_t *type)
100 unsigned result = hash_ptr(type->expression);
101 result ^= hash_ptr(type->typeof_type);
106 static unsigned hash_type(const type_t *type)
110 switch (type->kind) {
116 hash = hash_atomic_type(&type->atomic);
119 hash = hash_enum_type(&type->enumt);
121 case TYPE_COMPOUND_STRUCT:
122 case TYPE_COMPOUND_UNION:
123 hash = hash_compound_type(&type->compound);
126 hash = hash_function_type(&type->function);
129 hash = hash_pointer_type(&type->pointer);
132 hash = hash_reference_type(&type->reference);
135 hash = hash_array_type(&type->array);
138 hash = hash_ptr(type->typedeft.typedefe);
141 hash = hash_typeof_type(&type->typeoft);
145 unsigned some_prime = 99991;
146 hash ^= some_prime * type->base.qualifiers;
151 static bool atomic_types_equal(const atomic_type_t *type1,
152 const atomic_type_t *type2)
154 return type1->akind == type2->akind;
157 static bool function_types_equal(const function_type_t *type1,
158 const function_type_t *type2)
160 if (type1->return_type != type2->return_type)
162 if (type1->variadic != type2->variadic)
164 if (type1->unspecified_parameters != type2->unspecified_parameters)
166 if (type1->kr_style_parameters != type2->kr_style_parameters)
168 if (type1->linkage != type2->linkage)
170 if (type1->modifiers != type2->modifiers)
172 if (type1->calling_convention != type2->calling_convention)
175 function_parameter_t *param1 = type1->parameters;
176 function_parameter_t *param2 = type2->parameters;
177 while (param1 != NULL && param2 != NULL) {
178 if (param1->type != param2->type)
180 param1 = param1->next;
181 param2 = param2->next;
183 if (param1 != NULL || param2 != NULL)
189 static bool pointer_types_equal(const pointer_type_t *type1,
190 const pointer_type_t *type2)
192 return type1->points_to == type2->points_to &&
193 type1->base_variable == type2->base_variable;
196 static bool reference_types_equal(const reference_type_t *type1,
197 const reference_type_t *type2)
199 return type1->refers_to == type2->refers_to;
202 static bool array_types_equal(const array_type_t *type1,
203 const array_type_t *type2)
205 if (type1->element_type != type2->element_type)
207 if (type1->is_variable != type2->is_variable)
209 if (type1->is_static != type2->is_static)
211 if (type1->size_constant != type2->size_constant)
214 /* never identify vla types, because we need them for caching calculated
215 * sizes later in ast2firm */
216 if (type1->is_vla || type2->is_vla)
219 /* TODO: compare size expressions for equality... */
224 static bool compound_types_equal(const compound_type_t *type1,
225 const compound_type_t *type2)
227 return type1->compound == type2->compound;
230 static bool enum_types_equal(const enum_type_t *type1,
231 const enum_type_t *type2)
233 return type1->enume == type2->enume;
236 static bool typedef_types_equal(const typedef_type_t *type1,
237 const typedef_type_t *type2)
239 return type1->typedefe == type2->typedefe;
242 static bool typeof_types_equal(const typeof_type_t *type1,
243 const typeof_type_t *type2)
245 if (type1->expression != type2->expression)
247 if (type1->typeof_type != type2->typeof_type)
253 static bool types_equal(const type_t *type1, const type_t *type2)
257 if (type1->kind != type2->kind)
259 if (type1->base.qualifiers != type2->base.qualifiers)
262 switch (type1->kind) {
264 /* Hmm, the error type is never equal */
269 return atomic_types_equal(&type1->atomic, &type2->atomic);
271 return enum_types_equal(&type1->enumt, &type2->enumt);
272 case TYPE_COMPOUND_STRUCT:
273 case TYPE_COMPOUND_UNION:
274 return compound_types_equal(&type1->compound, &type2->compound);
276 return function_types_equal(&type1->function, &type2->function);
278 return pointer_types_equal(&type1->pointer, &type2->pointer);
280 return reference_types_equal(&type1->reference, &type2->reference);
282 return array_types_equal(&type1->array, &type2->array);
284 return typeof_types_equal(&type1->typeoft, &type2->typeoft);
286 return typedef_types_equal(&type1->typedeft, &type2->typedeft);
292 #define HashSet type_hash_t
293 #define ValueType type_t*
294 #define NullValue NULL
295 #define DeletedValue ((type_t*)-1)
296 #define Hash(this, key) hash_type(key)
297 #define KeysEqual(this,key1,key2) types_equal(key1, key2)
298 #define SetRangeEmpty(ptr,size) memset(ptr, 0, (size) * sizeof(*(ptr)))
300 void _typehash_init(type_hash_t *hash);
301 #define hashset_init _typehash_init
302 void _typehash_destroy(type_hash_t *hash);
303 #define hashset_destroy _typehash_destroy
304 type_t *_typehash_insert(type_hash_t *hash, type_t *type);
305 #define hashset_insert _typehash_insert
306 #define SCALAR_RETURN
308 #include "adt/hashset.c.inl"
310 static type_hash_t typehash;
312 void init_typehash(void)
314 _typehash_init(&typehash);
317 void exit_typehash(void)
319 _typehash_destroy(&typehash);
322 type_t *typehash_insert(type_t *type)
324 return _typehash_insert(&typehash, type);