X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type.c;h=ac34d3d166fa1377ade876976452aed2b0eed5d1;hb=20a7b862fd7e178b3778b3b9e632299649544efc;hp=8719ec1dbbb3fbfde72c2f491109fb65ff01cf5e;hpb=61bb8cbf62e7ca43ca99859159cc159bdb6c405c;p=cparser diff --git a/type.c b/type.c index 8719ec1..ac34d3d 100644 --- a/type.c +++ b/type.c @@ -1,22 +1,179 @@ +/* + * 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 + #include "type_t.h" +#include "symbol_t.h" #include "type_hash.h" #include "adt/error.h" +#include "lang_features.h" static struct obstack _type_obst; -struct obstack *type_obst = &_type_obst; static FILE *out; -static int type_visited = 0; - -static void intern_print_type_pre(type_t *type); -static void intern_print_type_post(type_t *type); +struct obstack *type_obst = &_type_obst; +static int type_visited = 0; +static bool print_implicit_array_size = false; + +static void intern_print_type_pre(const type_t *type, bool top); +static void intern_print_type_post(const type_t *type, bool top); + +typedef struct atomic_type_properties_t atomic_type_properties_t; +struct atomic_type_properties_t { + unsigned size; /**< type size in bytes */ + unsigned alignment; /**< type alignment in bytes */ + unsigned flags; /**< type flags from atomic_type_flag_t */ +}; + +static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = { + //ATOMIC_TYPE_INVALID = 0, + [ATOMIC_TYPE_VOID] = { + .size = 0, + .alignment = 0, + .flags = ATOMIC_TYPE_FLAG_NONE + }, + [ATOMIC_TYPE_CHAR] = { + .size = 1, + .alignment = 1, + /* signed flag will be set when known */ + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_SCHAR] = { + .size = 1, + .alignment = 1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_UCHAR] = { + .size = 1, + .alignment = 1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_SHORT] = { + .size = 2, + .alignment = 2, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED + }, + [ATOMIC_TYPE_USHORT] = { + .size = 2, + .alignment = 2, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_INT] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_UINT] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_LONG] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_ULONG] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_LONGLONG] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_ULONGLONG] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_BOOL] = { + .size = (unsigned) -1, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC, + }, + [ATOMIC_TYPE_FLOAT] = { + .size = 4, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_DOUBLE] = { + .size = 8, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + [ATOMIC_TYPE_LONG_DOUBLE] = { + .size = 12, + .alignment = (unsigned) -1, + .flags = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC + | ATOMIC_TYPE_FLAG_SIGNED, + }, + /* complex and imaginary types are set in init_types */ +}; void init_types(void) { obstack_init(type_obst); + + atomic_type_properties_t *props = atomic_type_properties; + + if(char_is_signed) { + props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED; + } + + unsigned int_size = machine_size < 32 ? 2 : 4; + unsigned long_size = machine_size < 64 ? 4 : 8; + unsigned llong_size = machine_size < 32 ? 4 : 8; + + props[ATOMIC_TYPE_INT].size = int_size; + props[ATOMIC_TYPE_INT].alignment = int_size; + props[ATOMIC_TYPE_UINT].size = int_size; + props[ATOMIC_TYPE_UINT].alignment = int_size; + props[ATOMIC_TYPE_LONG].size = long_size; + props[ATOMIC_TYPE_LONG].alignment = long_size; + props[ATOMIC_TYPE_ULONG].size = long_size; + props[ATOMIC_TYPE_ULONG].alignment = long_size; + props[ATOMIC_TYPE_LONGLONG].size = llong_size; + props[ATOMIC_TYPE_LONGLONG].alignment = llong_size; + props[ATOMIC_TYPE_ULONGLONG].size = llong_size; + props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size; + + /* TODO: backend specific, need a way to query the backend for this. + * The following are good settings for x86 */ + props[ATOMIC_TYPE_FLOAT].alignment = 4; + props[ATOMIC_TYPE_DOUBLE].alignment = 4; + props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4; + props[ATOMIC_TYPE_LONGLONG].alignment = 4; + props[ATOMIC_TYPE_ULONGLONG].alignment = 4; + + props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UINT]; } void exit_types(void) @@ -41,14 +198,17 @@ void print_type_qualifiers(type_qualifiers_t qualifiers) if(qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out); } +/** + * Prints the name of an atomic type kinds. + * + * @param kind The type kind. + */ static -void print_atomic_type(const atomic_type_t *type) +void print_atomic_kinds(atomic_type_kind_t kind) { - print_type_qualifiers(type->type.qualifiers); - - const char *s; - switch(type->atype) { - case ATOMIC_TYPE_INVALID: s = "INVALIDATOMIC"; break; + const char *s = "INVALIDATOMIC"; + switch(kind) { + case ATOMIC_TYPE_INVALID: break; case ATOMIC_TYPE_VOID: s = "void"; break; case ATOMIC_TYPE_BOOL: s = "_Bool"; break; case ATOMIC_TYPE_CHAR: s = "char"; break; @@ -65,56 +225,107 @@ void print_atomic_type(const atomic_type_t *type) case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break; case ATOMIC_TYPE_FLOAT: s = "float"; break; case ATOMIC_TYPE_DOUBLE: s = "double"; break; - default: s = "UNKNOWNATOMIC"; break; } fputs(s, out); } -static void print_function_type_pre(const function_type_t *type) +/** + * Prints the name of an atomic type. + * + * @param type The type. + */ +static +void print_atomic_type(const atomic_type_t *type) +{ + print_type_qualifiers(type->base.qualifiers); + print_atomic_kinds(type->akind); +} + +/** + * Prints the name of a complex type. + * + * @param type The type. + */ +static +void print_complex_type(const complex_type_t *type) +{ + print_type_qualifiers(type->base.qualifiers); + fputs("_Complex ", out); + print_atomic_kinds(type->akind); +} + +/** + * Prints the name of an imaginary type. + * + * @param type The type. + */ +static +void print_imaginary_type(const imaginary_type_t *type) { - print_type_qualifiers(type->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); + fputs("_Imaginary ", out); + print_atomic_kinds(type->akind); +} - intern_print_type_pre(type->result_type); +/** + * Print the first part (the prefix) of a type. + * + * @param type The type to print. + * @param top true, if this is the top type, false if it's an embedded type. + */ +static void print_function_type_pre(const function_type_t *type, bool top) +{ + print_type_qualifiers(type->base.qualifiers); - /* TODO: don't emit braces if we're the toplevel type... */ - fputc('(', out); + intern_print_type_pre(type->return_type, false); + + /* don't emit braces if we're the toplevel type... */ + if(!top) + fputc('(', out); } +/** + * Print the second part (the postfix) of a type. + * + * @param type The type to print. + * @param top true, if this is the top type, false if it's an embedded type. + */ static void print_function_type_post(const function_type_t *type, - const context_t *context) + const scope_t *scope, bool top) { - /* TODO: don't emit braces if we're the toplevel type... */ - intern_print_type_post(type->result_type); - fputc(')', out); + intern_print_type_post(type->return_type, false); + /* don't emit braces if we're the toplevel type... */ + if(!top) + fputc(')', out); fputc('(', out); - int first = 1; - if(context == NULL) { + bool first = true; + if(scope == NULL) { function_parameter_t *parameter = type->parameters; for( ; parameter != NULL; parameter = parameter->next) { if(first) { - first = 0; + first = false; } else { fputs(", ", out); } print_type(parameter->type); } } else { - declaration_t *parameter = context->declarations; + declaration_t *parameter = scope->declarations; for( ; parameter != NULL; parameter = parameter->next) { if(first) { - first = 0; + first = false; } else { fputs(", ", out); } print_type_ext(parameter->type, parameter->symbol, - ¶meter->context); + ¶meter->scope); } } if(type->variadic) { if(first) { - first = 0; + first = false; } else { fputs(", ", out); } @@ -126,37 +337,75 @@ static void print_function_type_post(const function_type_t *type, fputc(')', out); } +/** + * Prints the prefix part of a pointer type. + * + * @param type The pointer type. + */ static void print_pointer_type_pre(const pointer_type_t *type) { - intern_print_type_pre(type->points_to); + intern_print_type_pre(type->points_to, false); fputs("*", out); - print_type_qualifiers(type->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); } +/** + * Prints the postfix part of a pointer type. + * + * @param type The pointer type. + */ static void print_pointer_type_post(const pointer_type_t *type) { - intern_print_type_post(type->points_to); + intern_print_type_post(type->points_to, false); } +/** + * Prints the prefix part of an array type. + * + * @param type The array type. + */ static void print_array_type_pre(const array_type_t *type) { - intern_print_type_pre(type->element_type); + intern_print_type_pre(type->element_type, false); } +/** + * Prints the postfix part of an array type. + * + * @param type The array type. + */ static void print_array_type_post(const array_type_t *type) { fputc('[', out); if(type->is_static) { fputs("static ", out); } - print_type_qualifiers(type->type.qualifiers); - if(type->size != NULL) { - print_expression(type->size); + print_type_qualifiers(type->base.qualifiers); + if(type->size_expression != NULL + && (print_implicit_array_size || !type->has_implicit_size)) { + print_expression(type->size_expression); } fputc(']', out); - intern_print_type_post(type->element_type); + intern_print_type_post(type->element_type, false); +} + +/** + * Prints the postfix part of a bitfield type. + * + * @param type The array type. + */ +static void print_bitfield_type_post(const bitfield_type_t *type) +{ + fputs(" : ", out); + print_expression(type->size); + intern_print_type_post(type->base_type, false); } +/** + * Prints an enum definition. + * + * @param declaration The enum's type declaration. + */ void print_enum_definition(const declaration_t *declaration) { fputs("{\n", out); @@ -171,7 +420,13 @@ void print_enum_definition(const declaration_t *declaration) fprintf(out, "%s", entry->symbol->string); if(entry->init.initializer != NULL) { fprintf(out, " = "); - print_expression(entry->init.enum_value); + + /* skip the implicit cast */ + expression_t *expression = entry->init.enum_value; + if(expression->kind == EXPR_UNARY_CAST_IMPLICIT) { + expression = expression->unary.value; + } + print_expression(expression); } fprintf(out, ",\n"); } @@ -181,9 +436,14 @@ void print_enum_definition(const declaration_t *declaration) fputs("}", out); } +/** + * Prints an enum type. + * + * @param type The enum type. + */ static void print_type_enum(const enum_type_t *type) { - print_type_qualifiers(type->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); fputs("enum ", out); declaration_t *declaration = type->declaration; @@ -195,12 +455,17 @@ static void print_type_enum(const enum_type_t *type) } } +/** + * Print the compound part of a compound type. + * + * @param declaration The declaration of the compound type. + */ void print_compound_definition(const declaration_t *declaration) { fputs("{\n", out); change_indent(1); - declaration_t *iter = declaration->context.declarations; + declaration_t *iter = declaration->scope.declarations; for( ; iter != NULL; iter = iter->next) { print_indent(); print_declaration(iter); @@ -212,14 +477,19 @@ void print_compound_definition(const declaration_t *declaration) fputs("}", out); } +/** + * Prints a compound type. + * + * @param type The compound type. + */ static void print_compound_type(const compound_type_t *type) { - print_type_qualifiers(type->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); - if(type->type.type == TYPE_COMPOUND_STRUCT) { + if(type->base.kind == TYPE_COMPOUND_STRUCT) { fputs("struct ", out); } else { - assert(type->type.type == TYPE_COMPOUND_UNION); + assert(type->base.kind == TYPE_COMPOUND_UNION); fputs("union ", out); } @@ -232,12 +502,23 @@ static void print_compound_type(const compound_type_t *type) } } -static void print_typedef_type_pre(typedef_type_t *type) +/** + * Prints the prefix part of a typedef type. + * + * @param type The typedef type. + */ +static void print_typedef_type_pre(const typedef_type_t *const type) { + print_type_qualifiers(type->base.qualifiers); fputs(type->declaration->symbol->string, out); } -static void print_typeof_type_pre(typeof_type_t *type) +/** + * Prints the prefix part of a typeof type. + * + * @param type The typeof type. + */ +static void print_typeof_type_pre(const typeof_type_t *const type) { fputs("typeof(", out); if(type->expression != NULL) { @@ -249,11 +530,19 @@ static void print_typeof_type_pre(typeof_type_t *type) fputc(')', out); } -static void intern_print_type_pre(type_t *type) +/** + * Prints the prefix part of a type. + * + * @param type The type. + * @param top true if we print the toplevel type, false else. + */ +static void intern_print_type_pre(const type_t *const type, const bool top) { - switch(type->type) { + switch(type->kind) { + case TYPE_ERROR: + fputs("", out); case TYPE_INVALID: - fputs("invalid", out); + fputs("", out); return; case TYPE_ENUM: print_type_enum(&type->enumt); @@ -261,6 +550,12 @@ static void intern_print_type_pre(type_t *type) case TYPE_ATOMIC: print_atomic_type(&type->atomic); return; + case TYPE_COMPLEX: + print_complex_type(&type->complex); + return; + case TYPE_IMAGINARY: + print_imaginary_type(&type->imaginary); + return; case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: print_compound_type(&type->compound); @@ -269,11 +564,14 @@ static void intern_print_type_pre(type_t *type) fputs(type->builtin.symbol->string, out); return; case TYPE_FUNCTION: - print_function_type_pre(&type->function); + print_function_type_pre(&type->function, top); return; case TYPE_POINTER: print_pointer_type_pre(&type->pointer); return; + case TYPE_BITFIELD: + intern_print_type_pre(type->bitfield.base_type, top); + return; case TYPE_ARRAY: print_array_type_pre(&type->array); return; @@ -287,11 +585,17 @@ static void intern_print_type_pre(type_t *type) fputs("unknown", out); } -static void intern_print_type_post(type_t *type) +/** + * Prints the postfix part of a type. + * + * @param type The type. + * @param top true if we print the toplevel type, false else. + */ +static void intern_print_type_post(const type_t *const type, const bool top) { - switch(type->type) { + switch(type->kind) { case TYPE_FUNCTION: - print_function_type_post(&type->function, NULL); + print_function_type_post(&type->function, NULL, top); return; case TYPE_POINTER: print_pointer_type_post(&type->pointer); @@ -299,8 +603,14 @@ static void intern_print_type_post(type_t *type) case TYPE_ARRAY: print_array_type_post(&type->array); return; + case TYPE_BITFIELD: + print_bitfield_type_post(&type->bitfield); + return; + case TYPE_ERROR: case TYPE_INVALID: case TYPE_ATOMIC: + case TYPE_COMPLEX: + case TYPE_IMAGINARY: case TYPE_ENUM: case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: @@ -311,183 +621,269 @@ static void intern_print_type_post(type_t *type) } } -void print_type(type_t *type) +/** + * Prints a type. + * + * @param type The type. + */ +void print_type(const type_t *const type) { print_type_ext(type, NULL, NULL); } -void print_type_ext(type_t *type, const symbol_t *symbol, - const context_t *context) +void print_type_ext(const type_t *const type, const symbol_t *symbol, + const scope_t *scope) { if(type == NULL) { fputs("nil type", out); return; } - intern_print_type_pre(type); + intern_print_type_pre(type, true); if(symbol != NULL) { fputc(' ', out); fputs(symbol->string, out); } - if(type->type == TYPE_FUNCTION) { - print_function_type_post((const function_type_t*) type, context); + if(type->kind == TYPE_FUNCTION) { + print_function_type_post(&type->function, scope, true); } else { - intern_print_type_post(type); + intern_print_type_post(type, true); + } +} + +/** + * Return the size of a type AST node. + * + * @param type The type. + */ +static size_t get_type_size(const type_t *type) +{ + switch(type->kind) { + case TYPE_ATOMIC: return sizeof(atomic_type_t); + case TYPE_COMPLEX: return sizeof(complex_type_t); + case TYPE_IMAGINARY: return sizeof(imaginary_type_t); + case TYPE_COMPOUND_STRUCT: + case TYPE_COMPOUND_UNION: return sizeof(compound_type_t); + case TYPE_ENUM: return sizeof(enum_type_t); + case TYPE_FUNCTION: return sizeof(function_type_t); + case TYPE_POINTER: return sizeof(pointer_type_t); + case TYPE_ARRAY: return sizeof(array_type_t); + case TYPE_BUILTIN: return sizeof(builtin_type_t); + case TYPE_TYPEDEF: return sizeof(typedef_type_t); + case TYPE_TYPEOF: return sizeof(typeof_type_t); + case TYPE_BITFIELD: return sizeof(bitfield_type_t); + case TYPE_ERROR: panic("error type found"); + case TYPE_INVALID: panic("invalid type found"); + } + panic("unknown type found"); +} + +/** + * Duplicates a type. + * + * @param type The type to copy. + * @return A copy of the type. + * + * @note This does not produce a deep copy! + */ +type_t *duplicate_type(const type_t *type) +{ + size_t size = get_type_size(type); + + type_t *copy = obstack_alloc(type_obst, size); + memcpy(copy, type, size); + + return copy; +} + +/** + * Returns the unqualified type of a given type. + * + * @param type The type. + * @returns The unqualified type. + */ +type_t *get_unqualified_type(type_t *type) +{ + if(type->base.qualifiers == TYPE_QUALIFIER_NONE) + return type; + + type_t *unqualified_type = duplicate_type(type); + unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE; + + type_t *result = typehash_insert(unqualified_type); + if(result != unqualified_type) { + obstack_free(type_obst, unqualified_type); } + + return result; } +/** + * Check if a type is valid. + * + * @param type The type to check. + * @return true if type represents a valid type. + */ bool type_valid(const type_t *type) { - return type->type != TYPE_INVALID; + return type->kind != TYPE_INVALID; } +static bool test_atomic_type_flag(atomic_type_kind_t kind, + atomic_type_flag_t flag) +{ + assert(kind <= ATOMIC_TYPE_LAST); + return (atomic_type_properties[kind].flags & flag) != 0; +} + +/** + * Returns true if the given type is an integer type. + * + * @param type The type to check. + * @return True if type is an integer type. + */ bool is_type_integer(const type_t *type) { assert(!is_typeref(type)); - if(type->type == TYPE_ENUM) + if(type->kind == TYPE_ENUM) + return true; + if(type->kind == TYPE_BITFIELD) return true; - if(type->type != TYPE_ATOMIC) + if(type->kind != TYPE_ATOMIC) return false; - switch(type->atomic.atype) { - case ATOMIC_TYPE_BOOL: - case ATOMIC_TYPE_CHAR: - case ATOMIC_TYPE_SCHAR: - case ATOMIC_TYPE_UCHAR: - case ATOMIC_TYPE_SHORT: - case ATOMIC_TYPE_USHORT: - case ATOMIC_TYPE_INT: - case ATOMIC_TYPE_UINT: - case ATOMIC_TYPE_LONG: - case ATOMIC_TYPE_ULONG: - case ATOMIC_TYPE_LONGLONG: - case ATOMIC_TYPE_ULONGLONG: - return true; - default: - return false; - } + return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER); } -bool is_type_floating(const type_t *type) +/** + * Returns true if the given type is an floating point type. + * + * @param type The type to check. + * @return True if type is a floating point type. + */ +bool is_type_float(const type_t *type) { assert(!is_typeref(type)); - if(type->type != TYPE_ATOMIC) + if(type->kind != TYPE_ATOMIC) return false; - switch(type->atomic.atype) { - case ATOMIC_TYPE_FLOAT: - case ATOMIC_TYPE_DOUBLE: - case ATOMIC_TYPE_LONG_DOUBLE: -#ifdef PROVIDE_COMPLEX - case ATOMIC_TYPE_FLOAT_COMPLEX: - case ATOMIC_TYPE_DOUBLE_COMPLEX: - case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX: - case ATOMIC_TYPE_FLOAT_IMAGINARY: - case ATOMIC_TYPE_DOUBLE_IMAGINARY: - case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY: -#endif - return true; - default: - return false; - } + return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT); } +/** + * Returns true if the given type is a signed type. + * + * @param type The type to check. + * @return True if type is a signed type. + */ bool is_type_signed(const type_t *type) { assert(!is_typeref(type)); /* enum types are int for now */ - if(type->type == TYPE_ENUM) + if(type->kind == TYPE_ENUM) return true; + if(type->kind == TYPE_BITFIELD) + return is_type_signed(type->bitfield.base_type); - if(type->type != TYPE_ATOMIC) - return false; - - switch(type->atomic.atype) { - case ATOMIC_TYPE_CHAR: - case ATOMIC_TYPE_SCHAR: - case ATOMIC_TYPE_SHORT: - case ATOMIC_TYPE_INT: - case ATOMIC_TYPE_LONG: - case ATOMIC_TYPE_LONGLONG: - case ATOMIC_TYPE_FLOAT: - case ATOMIC_TYPE_DOUBLE: - case ATOMIC_TYPE_LONG_DOUBLE: -#ifdef PROVIDE_COMPLEX - case ATOMIC_TYPE_FLOAT_COMPLEX: - case ATOMIC_TYPE_DOUBLE_COMPLEX: - case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX: - case ATOMIC_TYPE_FLOAT_IMAGINARY: - case ATOMIC_TYPE_DOUBLE_IMAGINARY: - case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY: -#endif - return true; - - case ATOMIC_TYPE_BOOL: - case ATOMIC_TYPE_UCHAR: - case ATOMIC_TYPE_USHORT: - case ATOMIC_TYPE_UINT: - case ATOMIC_TYPE_ULONG: - case ATOMIC_TYPE_ULONGLONG: - return false; - - case ATOMIC_TYPE_INVALID: - case ATOMIC_TYPE_VOID: + if(type->kind != TYPE_ATOMIC) return false; - } - panic("invalid atomic type found"); - return false; + return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED); } +/** + * Returns true if the given type represents an arithmetic type. + * + * @param type The type to check. + * @return True if type represents an arithmetic type. + */ bool is_type_arithmetic(const type_t *type) { assert(!is_typeref(type)); - if(is_type_integer(type) || is_type_floating(type)) - return 1; - - return 0; + switch(type->kind) { + case TYPE_BITFIELD: + case TYPE_ENUM: + return true; + case TYPE_ATOMIC: + return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC); + case TYPE_COMPLEX: + return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC); + case TYPE_IMAGINARY: + return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC); + default: + return false; + } } +/** + * Returns true if the given type represents a scalar type. + * + * @param type The type to check. + * @return True if type represents a scalar type. + */ bool is_type_scalar(const type_t *type) { assert(!is_typeref(type)); - if(type->type == TYPE_POINTER) - return 1; + switch (type->kind) { + case TYPE_POINTER: return true; + case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type); + default: break; + } return is_type_arithmetic(type); } +/** + * Check if a given type is incomplete. + * + * @param type The type to check. + * @return True if the given type is incomplete (ie. just forward). + */ bool is_type_incomplete(const type_t *type) { assert(!is_typeref(type)); - switch(type->type) { + switch(type->kind) { case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: { const compound_type_t *compound_type = &type->compound; declaration_t *declaration = compound_type->declaration; - return !declaration->init.is_defined; + return !declaration->init.complete; + } + case TYPE_ENUM: { + const enum_type_t *enum_type = &type->enumt; + declaration_t *declaration = enum_type->declaration; + return !declaration->init.complete; } - case TYPE_FUNCTION: - return true; case TYPE_ARRAY: - return type->array.size == NULL; + return type->array.size_expression == NULL + && !type->array.size_constant; case TYPE_ATOMIC: + return type->atomic.akind == ATOMIC_TYPE_VOID; + + case TYPE_COMPLEX: + return type->complex.akind == ATOMIC_TYPE_VOID; + + case TYPE_IMAGINARY: + return type->imaginary.akind == ATOMIC_TYPE_VOID; + + case TYPE_BITFIELD: + case TYPE_FUNCTION: case TYPE_POINTER: - case TYPE_ENUM: + case TYPE_BUILTIN: + case TYPE_ERROR: return false; case TYPE_TYPEDEF: case TYPE_TYPEOF: - case TYPE_BUILTIN: panic("is_type_incomplete called without typerefs skipped"); case TYPE_INVALID: break; @@ -496,73 +892,152 @@ bool is_type_incomplete(const type_t *type) panic("invalid type found"); } +/** + * Check if two function types are compatible. + */ +static bool function_types_compatible(const function_type_t *func1, + const function_type_t *func2) +{ + const type_t* const ret1 = skip_typeref(func1->return_type); + const type_t* const ret2 = skip_typeref(func2->return_type); + if (!types_compatible(ret1, ret2)) + return false; + + /* can parameters be compared? */ + if (func1->unspecified_parameters || func2->unspecified_parameters) + return true; + + if (func1->variadic != func2->variadic) + return false; + + /* TODO: handling of unspecified parameters not correct yet */ + + /* all argument types must be compatible */ + function_parameter_t *parameter1 = func1->parameters; + function_parameter_t *parameter2 = func2->parameters; + for ( ; parameter1 != NULL && parameter2 != NULL; + parameter1 = parameter1->next, parameter2 = parameter2->next) { + type_t *parameter1_type = skip_typeref(parameter1->type); + type_t *parameter2_type = skip_typeref(parameter2->type); + + parameter1_type = get_unqualified_type(parameter1_type); + parameter2_type = get_unqualified_type(parameter2_type); + + if (!types_compatible(parameter1_type, parameter2_type)) + return false; + } + /* same number of arguments? */ + if (parameter1 != NULL || parameter2 != NULL) + return false; + + return true; +} + +/** + * Check if two array types are compatible. + */ +static bool array_types_compatible(const array_type_t *array1, + const array_type_t *array2) +{ + type_t *element_type1 = skip_typeref(array1->element_type); + type_t *element_type2 = skip_typeref(array2->element_type); + if(!types_compatible(element_type1, element_type2)) + return false; + + if(!array1->size_constant || !array2->size_constant) + return true; + + return array1->size == array2->size; +} + +/** + * Check if two types are compatible. + */ bool types_compatible(const type_t *type1, const type_t *type2) { assert(!is_typeref(type1)); assert(!is_typeref(type2)); - /* TODO: really incomplete */ + /* shortcut: the same type is always compatible */ if(type1 == type2) return true; - if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) { - return type1->atomic.atype == type2->atomic.atype; + if(type1->base.qualifiers != type2->base.qualifiers) + return false; + if(type1->kind != type2->kind) + return false; + + switch(type1->kind) { + case TYPE_FUNCTION: + return function_types_compatible(&type1->function, &type2->function); + case TYPE_ATOMIC: + return type1->atomic.akind == type2->atomic.akind; + case TYPE_COMPLEX: + return type1->complex.akind == type2->complex.akind; + case TYPE_IMAGINARY: + return type1->imaginary.akind == type2->imaginary.akind; + case TYPE_ARRAY: + return array_types_compatible(&type1->array, &type2->array); + + case TYPE_POINTER: { + const type_t *const to1 = skip_typeref(type1->pointer.points_to); + const type_t *const to2 = skip_typeref(type2->pointer.points_to); + return types_compatible(to1, to2); + } + + case TYPE_COMPOUND_STRUCT: + case TYPE_COMPOUND_UNION: + case TYPE_ENUM: + case TYPE_BUILTIN: + /* TODO: not implemented */ + break; + + case TYPE_BITFIELD: + /* not sure if this makes sense or is even needed, implement it if you + * really need it! */ + panic("type compatibility check for bitfield type"); + + case TYPE_ERROR: + /* Hmm, the error type should be compatible to all other types */ + return true; + case TYPE_INVALID: + panic("invalid type found in compatible types"); + case TYPE_TYPEDEF: + case TYPE_TYPEOF: + panic("typerefs not skipped in compatible types?!?"); } + /* TODO: incomplete */ return false; } +/** + * Check if two pointer types are compatible. + */ bool pointers_compatible(const type_t *type1, const type_t *type2) { assert(!is_typeref(type1)); assert(!is_typeref(type2)); - assert(type1->type == TYPE_POINTER); - assert(type2->type == TYPE_POINTER); + assert(type1->kind == TYPE_POINTER); + assert(type2->kind == TYPE_POINTER); + (void) type1; + (void) type2; /* TODO */ return true; } -static size_t get_type_size(type_t *type) -{ - switch(type->type) { - case TYPE_ATOMIC: return sizeof(atomic_type_t); break; - case TYPE_COMPOUND_STRUCT: - case TYPE_COMPOUND_UNION: return sizeof(compound_type_t); break; - case TYPE_ENUM: return sizeof(enum_type_t); break; - case TYPE_FUNCTION: return sizeof(function_type_t); break; - case TYPE_POINTER: return sizeof(pointer_type_t); break; - case TYPE_ARRAY: return sizeof(array_type_t); break; - case TYPE_BUILTIN: return sizeof(builtin_type_t); break; - case TYPE_TYPEDEF: return sizeof(typedef_type_t); break; - case TYPE_TYPEOF: return sizeof(typeof_type_t); break; - case TYPE_INVALID: panic("invalid type found"); break; - } - panic("unknown type found"); -} - /** - * duplicates a type - * note that this does not produce a deep copy! + * Skip all typerefs and return the underlying type. */ -type_t *duplicate_type(type_t *type) -{ - size_t size = get_type_size(type); - - type_t *copy = obstack_alloc(type_obst, size); - memcpy(copy, type, size); - - (void) duplicate_type; - - return type; -} - type_t *skip_typeref(type_t *type) { - unsigned qualifiers = type->base.qualifiers; + unsigned qualifiers = TYPE_QUALIFIER_NONE; - while(1) { - switch(type->type) { + while(true) { + switch(type->kind) { + case TYPE_ERROR: + return type; case TYPE_TYPEDEF: { qualifiers |= type->base.qualifiers; const typedef_type_t *typedef_type = &type->typedeft; @@ -578,26 +1053,125 @@ type_t *skip_typeref(type_t *type) if(typeof_type->typeof_type != NULL) { type = typeof_type->typeof_type; } else { - type = typeof_type->expression->base.datatype; + type = typeof_type->expression->base.type; } continue; } - case TYPE_BUILTIN: { - const builtin_type_t *builtin_type = &type->builtin; - type = builtin_type->real_type; - continue; - } default: break; } break; } + if (qualifiers != TYPE_QUALIFIER_NONE) { + type_t *const copy = duplicate_type(type); + copy->base.qualifiers |= qualifiers; + + type = typehash_insert(copy); + if (type != copy) { + obstack_free(type_obst, copy); + } + } + return type; } +unsigned get_atomic_type_size(atomic_type_kind_t kind) +{ + assert(kind <= ATOMIC_TYPE_LAST); + return atomic_type_properties[kind].size; +} + +unsigned get_atomic_type_alignment(atomic_type_kind_t kind) +{ + assert(kind <= ATOMIC_TYPE_LAST); + return atomic_type_properties[kind].alignment; +} + +unsigned get_atomic_type_flags(atomic_type_kind_t kind) +{ + assert(kind <= ATOMIC_TYPE_LAST); + return atomic_type_properties[kind].flags; +} + +atomic_type_kind_t get_intptr_kind(void) +{ + if(machine_size <= 32) + return ATOMIC_TYPE_INT; + else if(machine_size <= 64) + return ATOMIC_TYPE_LONG; + else + return ATOMIC_TYPE_LONGLONG; +} +atomic_type_kind_t get_uintptr_kind(void) +{ + if(machine_size <= 32) + return ATOMIC_TYPE_UINT; + else if(machine_size <= 64) + return ATOMIC_TYPE_ULONG; + else + return ATOMIC_TYPE_ULONGLONG; +} + +/** + * Find the atomic type kind representing a given size (signed). + */ +atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) { + static atomic_type_kind_t kinds[32]; + + assert(size < 32); + atomic_type_kind_t kind = kinds[size]; + if(kind == ATOMIC_TYPE_INVALID) { + static const atomic_type_kind_t possible_kinds[] = { + ATOMIC_TYPE_SCHAR, + ATOMIC_TYPE_SHORT, + ATOMIC_TYPE_INT, + ATOMIC_TYPE_LONG, + ATOMIC_TYPE_LONGLONG + }; + for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) { + if(get_atomic_type_size(possible_kinds[i]) == size) { + kind = possible_kinds[i]; + break; + } + } + kinds[size] = kind; + } + return kind; +} +/** + * Find the atomic type kind representing a given size (signed). + */ +atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) { + static atomic_type_kind_t kinds[32]; + + assert(size < 32); + atomic_type_kind_t kind = kinds[size]; + if(kind == ATOMIC_TYPE_INVALID) { + static const atomic_type_kind_t possible_kinds[] = { + ATOMIC_TYPE_UCHAR, + ATOMIC_TYPE_USHORT, + ATOMIC_TYPE_UINT, + ATOMIC_TYPE_ULONG, + ATOMIC_TYPE_ULONGLONG + }; + for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) { + if(get_atomic_type_size(possible_kinds[i]) == size) { + kind = possible_kinds[i]; + break; + } + } + kinds[size] = kind; + } + return kind; +} + +/** + * Hash the given type and return the "singleton" version + * of it. + */ static type_t *identify_new_type(type_t *type) { type_t *result = typehash_insert(type); @@ -607,32 +1181,103 @@ static type_t *identify_new_type(type_t *type) return result; } -type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers) +/** + * Creates a new atomic type. + * + * @param akind The kind of the atomic type. + * @param qualifiers Type qualifiers for the new type. + */ +type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers) { type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t)); memset(type, 0, sizeof(atomic_type_t)); - type->type = TYPE_ATOMIC; + type->kind = TYPE_ATOMIC; + type->base.qualifiers = qualifiers; + type->base.alignment = get_atomic_type_alignment(akind); + type->atomic.akind = akind; + + return identify_new_type(type); +} + +/** + * Creates a new complex type. + * + * @param akind The kind of the atomic type. + * @param qualifiers Type qualifiers for the new type. + */ +type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers) +{ + type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t)); + memset(type, 0, sizeof(complex_type_t)); + + type->kind = TYPE_COMPLEX; type->base.qualifiers = qualifiers; - type->atomic.atype = atype; + type->base.alignment = get_atomic_type_alignment(akind); + type->complex.akind = akind; return identify_new_type(type); } +/** + * Creates a new imaginary type. + * + * @param akind The kind of the atomic type. + * @param qualifiers Type qualifiers for the new type. + */ +type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers) +{ + type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t)); + memset(type, 0, sizeof(imaginary_type_t)); + + type->kind = TYPE_IMAGINARY; + type->base.qualifiers = qualifiers; + type->base.alignment = get_atomic_type_alignment(akind); + type->imaginary.akind = akind; + + return identify_new_type(type); +} + +/** + * Creates a new pointer type. + * + * @param points_to The points-to type for the new type. + * @param qualifiers Type qualifiers for the new type. + */ type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers) { type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t)); memset(type, 0, sizeof(pointer_type_t)); - type->type = TYPE_POINTER; + type->kind = TYPE_POINTER; type->base.qualifiers = qualifiers; + type->base.alignment = 0; type->pointer.points_to = points_to; return identify_new_type(type); } +type_t *make_array_type(type_t *element_type, size_t size, + type_qualifiers_t qualifiers) +{ + type_t *type = obstack_alloc(type_obst, sizeof(array_type_t)); + memset(type, 0, sizeof(array_type_t)); + + type->kind = TYPE_ARRAY; + type->base.qualifiers = qualifiers; + type->base.alignment = 0; + type->array.element_type = element_type; + type->array.size = size; + type->array.size_constant = true; + + return identify_new_type(type); +} + +/** + * Debug helper. Prints the given type to stdout. + */ static __attribute__((unused)) -void dbg_type(type_t *type) +void dbg_type(const type_t *type) { FILE *old_out = out; out = stderr;