X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type_hash.c;h=03b9f02dfd734057b4ada950ef1abd7b64be91f1;hb=fd16b92f058181088a385c3224c8814831c006d3;hp=3f84c5d4620227a4bb302a013bee24920fbfe76c;hpb=e66a2691d3291916ed2ec07ed1cdead2a95e1a9a;p=cparser diff --git a/type_hash.c b/type_hash.c index 3f84c5d..03b9f02 100644 --- a/type_hash.c +++ b/type_hash.c @@ -1,5 +1,26 @@ +/* + * This file is part of cparser. + * Copyright (C) 2007-2008 Matthias Braun + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ #include +#include + #include "type_hash.h" #include "adt/error.h" @@ -15,217 +36,263 @@ #undef HashSetIterator #undef HashSet -static -unsigned hash_ptr(const void *ptr) +/* TODO: ^= is a bad way of combining hashes since most addresses are very + * similar */ + +static unsigned hash_ptr(const void *ptr) { unsigned ptr_int = ((char*) ptr - (char*) NULL); return ptr_int >> 3; } -static -unsigned hash_atomic_type(const atomic_type_t *type) +static unsigned hash_atomic_type(const atomic_type_t *type) { unsigned some_prime = 27644437; + unsigned result = type->akind * some_prime; - return type->atype * some_prime; + return result; } -static -unsigned hash_pointer_type(const pointer_type_t *type) +static unsigned hash_pointer_type(const pointer_type_t *type) { return hash_ptr(type->points_to); } -static -unsigned hash_compound_type(const compound_type_t *type) +static unsigned hash_array_type(const array_type_t *type) { - unsigned result = hash_ptr(type->symbol); + return hash_ptr(type->element_type); +} - return result; +static unsigned hash_compound_type(const compound_type_t *type) +{ + return hash_ptr(type->declaration); } -static -unsigned hash_type(const type_t *type); +static unsigned hash_type(const type_t *type); -static -unsigned hash_method_type(const method_type_t *type) +static unsigned hash_function_type(const function_type_t *type) { - unsigned result = hash_ptr(type->result_type); + unsigned result = hash_ptr(type->return_type); - declaration_t *parameter = type->parameters; + function_parameter_t *parameter = type->parameters; while(parameter != NULL) { - result ^= hash_ptr(parameter); + result ^= hash_ptr(parameter->type); parameter = parameter->next; } return result; } -static -unsigned hash_enum_type(const enum_type_t *type) +static unsigned hash_enum_type(const enum_type_t *type) +{ + return hash_ptr(type->declaration); +} + +static unsigned hash_typeof_type(const typeof_type_t *type) { - unsigned result = hash_ptr(type->symbol); + unsigned result = hash_ptr(type->expression); + result ^= hash_ptr(type->typeof_type); - /* TODO */ + return result; +} + +static unsigned hash_bitfield_type(const bitfield_type_t *type) +{ + unsigned result = hash_ptr(type->base); + result ^= 27172145; return result; } -static -unsigned hash_type(const type_t *type) +static unsigned hash_type(const type_t *type) { - unsigned hash; + unsigned hash = 0; - switch(type->type) { + switch(type->kind) { case TYPE_INVALID: panic("internalizing void or invalid types not possible"); return 0; + case TYPE_ERROR: + return 0; case TYPE_ATOMIC: - hash = hash_atomic_type((const atomic_type_t*) type); + hash = hash_atomic_type(&type->atomic); break; case TYPE_ENUM: - hash = hash_enum_type((const enum_type_t*) type); + hash = hash_enum_type(&type->enumt); break; case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: - hash = hash_compound_type((const compound_type_t*) type); + hash = hash_compound_type(&type->compound); break; - case TYPE_METHOD: - hash = hash_method_type((const method_type_t*) type); + case TYPE_FUNCTION: + hash = hash_function_type(&type->function); break; case TYPE_POINTER: - hash = hash_pointer_type((const pointer_type_t*) type); + hash = hash_pointer_type(&type->pointer); + break; + case TYPE_ARRAY: + hash = hash_array_type(&type->array); break; case TYPE_BUILTIN: - hash = hash_ptr(((const builtin_type_t*) type)->symbol); + hash = hash_ptr(type->builtin.symbol); + break; + case TYPE_TYPEDEF: + hash = hash_ptr(type->typedeft.declaration); + break; + case TYPE_TYPEOF: + hash = hash_typeof_type(&type->typeoft); + break; + case TYPE_BITFIELD: + hash = hash_bitfield_type(&type->bitfield); break; } unsigned some_prime = 99991; - hash ^= some_prime * type->qualifiers; + hash ^= some_prime * type->base.qualifiers; return hash; } -static -int atomic_types_equal(const atomic_type_t *type1, const atomic_type_t *type2) -{ - return type1->atype == type2->atype; -} - -static -int compound_types_equal(const compound_type_t *type1, - const compound_type_t *type2) +static bool atomic_types_equal(const atomic_type_t *type1, + const atomic_type_t *type2) { - if(type1->type.type != type2->type.type) - return 0; - if(type1->symbol != type2->symbol) - return 0; - - declaration_t *entry1 = type1->context.declarations; - declaration_t *entry2 = type2->context.declarations; - - while(entry1 != NULL && entry2 != NULL) { - if(entry1->type != entry2->type) - return 0; - if(entry1->symbol != entry2->symbol) - return 0; - entry1 = entry1->next; - entry2 = entry2->next; - } - if(entry1 != NULL || entry2 != NULL) - return 0; - - return 1; + return type1->akind == type2->akind; } -static -int method_types_equal(const method_type_t *type1, const method_type_t *type2) +static bool function_types_equal(const function_type_t *type1, + const function_type_t *type2) { - if(type1->result_type != type2->result_type) - return 0; - - declaration_t *param1 = type1->parameters; - declaration_t *param2 = type2->parameters; + if(type1->return_type != type2->return_type) + return false; + if(type1->variadic != type2->variadic) + return false; + if(type1->unspecified_parameters != type2->unspecified_parameters) + return false; + if(type1->kr_style_parameters != type2->kr_style_parameters) + return false; + + function_parameter_t *param1 = type1->parameters; + function_parameter_t *param2 = type2->parameters; while(param1 != NULL && param2 != NULL) { if(param1->type != param2->type) - return 0; + return false; param1 = param1->next; param2 = param2->next; } if(param1 != NULL || param2 != NULL) - return 0; + return false; - return 1; + return true; } -static -int pointer_types_equal(const pointer_type_t *type1, - const pointer_type_t *type2) +static bool pointer_types_equal(const pointer_type_t *type1, + const pointer_type_t *type2) { return type1->points_to == type2->points_to; } -static -int enum_types_equal(const enum_type_t *type1, const enum_type_t *type2) +static bool array_types_equal(const array_type_t *type1, + const array_type_t *type2) { - if(type1->symbol != NULL && type1->symbol == type2->symbol) - return 1; - - enum_entry_t *entry1 = type1->entries; - enum_entry_t *entry2 = type2->entries; - while(entry1 != NULL && entry2 != NULL) { - if(entry1->symbol != entry2->symbol) - return 0; - /* TODO: compare expressions */ - entry1 = entry1->next; - entry2 = entry2->next; - } - if(entry1 != NULL || entry2 != NULL) - return 0; - - return 1; + if(type1->element_type != type2->element_type) + return false; + if(type1->is_variable != type2->is_variable) + return false; + if(type1->is_static != type2->is_static) + return false; + if(type1->size_constant != type2->size_constant) + return false; + + /* never identify vla types, because we need them for caching calculated + * sizes later in ast2firm */ + if(type1->is_vla || type2->is_vla) + return false; + + /* TODO: compare size expressions for equality... */ + + return false; } -static -int builtin_types_equal(const builtin_type_t *type1, - const builtin_type_t *type2) +static bool builtin_types_equal(const builtin_type_t *type1, + const builtin_type_t *type2) { return type1->symbol == type2->symbol; } -static -int types_equal(const type_t *type1, const type_t *type2) +static bool compound_types_equal(const compound_type_t *type1, + const compound_type_t *type2) { - if(type1 == type2) - return 1; - if(type1->type != type2->type) - return 0; - if(type1->qualifiers != type2->qualifiers) - return 0; + return type1->declaration == type2->declaration; +} + +static bool enum_types_equal(const enum_type_t *type1, + const enum_type_t *type2) +{ + return type1->declaration == type2->declaration; +} + +static bool typedef_types_equal(const typedef_type_t *type1, + const typedef_type_t *type2) +{ + return type1->declaration == type2->declaration; +} + +static bool typeof_types_equal(const typeof_type_t *type1, + const typeof_type_t *type2) +{ + if(type1->expression != type2->expression) + return false; + if(type1->typeof_type != type2->typeof_type) + return false; + + return true; +} + +static bool bitfield_types_equal(const bitfield_type_t *type1, + const bitfield_type_t *type2) +{ + if(type1->base != type2->base) + return false; + /* TODO: compare size expression */ + return false; +} - switch(type1->type) { +static bool types_equal(const type_t *type1, const type_t *type2) +{ + if(type1 == type2) + return true; + if(type1->kind != type2->kind) + return false; + if(type1->base.qualifiers != type2->base.qualifiers) + return false; + + switch(type1->kind) { + case TYPE_ERROR: + /* Hmm, the error type is never equal */ + return false; case TYPE_INVALID: - return 0; + return false; case TYPE_ATOMIC: - return atomic_types_equal((const atomic_type_t*) type1, - (const atomic_type_t*) type2); + return atomic_types_equal(&type1->atomic, &type2->atomic); + case TYPE_ENUM: + return enum_types_equal(&type1->enumt, &type2->enumt); case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: - return compound_types_equal((const compound_type_t*) type1, - (const compound_type_t*) type2); - case TYPE_ENUM: - return enum_types_equal((const enum_type_t*) type1, - (const enum_type_t*) type2); - case TYPE_METHOD: - return method_types_equal((const method_type_t*) type1, - (const method_type_t*) type2); + return compound_types_equal(&type1->compound, &type2->compound); + case TYPE_FUNCTION: + return function_types_equal(&type1->function, &type2->function); case TYPE_POINTER: - return pointer_types_equal((const pointer_type_t*) type1, - (const pointer_type_t*) type2); + return pointer_types_equal(&type1->pointer, &type2->pointer); + case TYPE_ARRAY: + return array_types_equal(&type1->array, &type2->array); case TYPE_BUILTIN: - return builtin_types_equal((const builtin_type_t*) type1, - (const builtin_type_t*) type2); + return builtin_types_equal(&type1->builtin, &type2->builtin); + case TYPE_TYPEOF: + return typeof_types_equal(&type1->typeoft, &type2->typeoft); + case TYPE_TYPEDEF: + return typedef_types_equal(&type1->typedeft, &type2->typedeft); + case TYPE_BITFIELD: + return bitfield_types_equal(&type1->bitfield, &type2->bitfield); } abort();