X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type.c;h=bd8b50cfd74e52eaac848a2e3fa572e1ae65bfa5;hb=2e89f72ef82f9bf281d9fd62c076e5681dd9643b;hp=9594ae8dce26e8512a5a2a02485d9874466dddca;hpb=62c3fec4c8a371167ad7be3b4cd08c563c21e121;p=cparser diff --git a/type.c b/type.c index 9594ae8..bd8b50c 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; +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) @@ -36,19 +193,32 @@ void inc_type_visited(void) void print_type_qualifiers(type_qualifiers_t qualifiers) { - if(qualifiers & TYPE_QUALIFIER_CONST) fputs("const ", out); - if(qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out); - if(qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out); + int first = 1; + if (qualifiers & TYPE_QUALIFIER_CONST) { + fputs(" const" + first, out); + first = 0; + } + if (qualifiers & TYPE_QUALIFIER_VOLATILE) { + fputs(" volatile" + first, out); + first = 0; + } + if (qualifiers & TYPE_QUALIFIER_RESTRICT) { + fputs(" restrict" + first, out); + first = 0; + } } +/** + * 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->akind) { - 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; @@ -65,107 +235,215 @@ 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); } +/** + * 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); + if (type->base.qualifiers != 0) + fputc(' ', out); + 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) +{ + int empty = type->base.qualifiers == 0; + print_type_qualifiers(type->base.qualifiers); + fputs(" _Complex " + empty, 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) +{ + int empty = type->base.qualifiers == 0; + print_type_qualifiers(type->base.qualifiers); + fputs(" _Imaginary " + empty, out); + print_atomic_kinds(type->akind); +} + +/** + * 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->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); + if (type->base.qualifiers != 0) + fputc(' ', out); + intern_print_type_pre(type->return_type, false); + switch (type->calling_convention) { + case CC_CDECL: + fputs("__cdecl ", out); + break; + case CC_STDCALL: + fputs("__stdcall ", out); + break; + case CC_FASTCALL: + fputs("__fastcall ", out); + break; + case CC_THISCALL: + fputs("__thiscall ", out); + break; + case CC_DEFAULT: + break; + } + /* don't emit braces if we're the toplevel type... */ - if(!top) + 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, bool top) + const scope_t *scope, bool top) { 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; + if (first) { + 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; + if (first) { + first = false; } else { fputs(", ", out); } print_type_ext(parameter->type, parameter->symbol, - ¶meter->context); + ¶meter->scope); } } - if(type->variadic) { - if(first) { - first = 0; + if (type->variadic) { + if (first) { + first = false; } else { fputs(", ", out); } fputs("...", out); } - if(first && !type->unspecified_parameters) { + if (first && !type->unspecified_parameters) { fputs("void", out); } fputc(')', out); + + /* don't emit braces if we're the toplevel type... */ + if (!top) + 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, false); fputs("*", out); - print_type_qualifiers(type->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); + if (type->base.qualifiers != 0) + fputc(' ', out); } +/** + * 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, 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, 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) { + 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->base.qualifiers != 0) + fputc(' ', out); + 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, 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, false); + 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); @@ -178,9 +456,15 @@ void print_enum_definition(const declaration_t *declaration) print_indent(); fprintf(out, "%s", entry->symbol->string); - if(entry->init.initializer != NULL) { + 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"); } @@ -190,26 +474,37 @@ 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); - fputs("enum ", out); + int empty = type->base.qualifiers == 0; + print_type_qualifiers(type->base.qualifiers); + fputs(" enum " + empty, out); declaration_t *declaration = type->declaration; symbol_t *symbol = declaration->symbol; - if(symbol != NULL) { + if (symbol != NULL) { fputs(symbol->string, out); } else { print_enum_definition(declaration); } } +/** + * 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); @@ -221,36 +516,54 @@ 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); + int empty = type->base.qualifiers == 0; + print_type_qualifiers(type->base.qualifiers); - if(type->type.kind == TYPE_COMPOUND_STRUCT) { - fputs("struct ", out); + if (type->base.kind == TYPE_COMPOUND_STRUCT) { + fputs(" struct " + empty, out); } else { - assert(type->type.kind == TYPE_COMPOUND_UNION); - fputs("union ", out); + assert(type->base.kind == TYPE_COMPOUND_UNION); + fputs(" union " + empty, out); } declaration_t *declaration = type->declaration; symbol_t *symbol = declaration->symbol; - if(symbol != NULL) { + if (symbol != NULL) { fputs(symbol->string, out); } else { print_compound_definition(declaration); } } +/** + * 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->type.qualifiers); + print_type_qualifiers(type->base.qualifiers); + if (type->base.qualifiers != 0) + fputc(' ', out); fputs(type->declaration->symbol->string, out); } +/** + * 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) { + if (type->expression != NULL) { assert(type->typeof_type == NULL); print_expression(type->expression); } else { @@ -259,11 +572,18 @@ static void print_typeof_type_pre(const typeof_type_t *const type) fputc(')', out); } +/** + * 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->kind) { case TYPE_ERROR: fputs("", out); + return; case TYPE_INVALID: fputs("", out); return; @@ -273,6 +593,12 @@ static void intern_print_type_pre(const type_t *const type, const bool top) 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); @@ -287,7 +613,7 @@ static void intern_print_type_pre(const type_t *const type, const bool top) print_pointer_type_pre(&type->pointer); return; case TYPE_BITFIELD: - intern_print_type_pre(type->bitfield.base, top); + intern_print_type_pre(type->bitfield.base_type, top); return; case TYPE_ARRAY: print_array_type_pre(&type->array); @@ -302,6 +628,12 @@ static void intern_print_type_pre(const type_t *const type, const bool top) fputs("unknown", out); } +/** + * 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->kind) { @@ -320,6 +652,8 @@ static void intern_print_type_post(const type_t *const type, const bool top) 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: @@ -330,35 +664,47 @@ static void intern_print_type_post(const type_t *const type, const bool top) } } +/** + * 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(const type_t *const type, const symbol_t *symbol, - const context_t *context) + const scope_t *scope) { - if(type == NULL) { + if (type == NULL) { fputs("nil type", out); return; } intern_print_type_pre(type, true); - if(symbol != NULL) { + if (symbol != NULL) { fputc(' ', out); fputs(symbol->string, out); } - if(type->kind == TYPE_FUNCTION) { - print_function_type_post(&type->function, context, true); + if (type->kind == TYPE_FUNCTION) { + print_function_type_post(&type->function, scope, true); } else { intern_print_type_post(type, true); } } -static size_t get_type_size(type_t *type) +/** + * 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); @@ -376,10 +722,14 @@ static size_t get_type_size(type_t *type) } /** - * duplicates a type - * note that this does not produce a deep copy! + * 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(type_t *type) +type_t *duplicate_type(const type_t *type) { size_t size = get_type_size(type); @@ -389,143 +739,161 @@ type_t *duplicate_type(type_t *type) 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) + 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) { + 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->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->kind == TYPE_ENUM) + if (type->kind == TYPE_ENUM) + return true; + if (type->kind == TYPE_BITFIELD) return true; - if(type->kind != TYPE_ATOMIC) + if (type->kind != TYPE_ATOMIC) return false; - switch(type->atomic.akind) { - 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); +} + +/** + * Returns true if the given type is an enum type. + * + * @param type The type to check. + * @return True if type is an enum type. + */ +bool is_type_enum(const type_t *type) +{ + assert(!is_typeref(type)); + return type->kind == TYPE_ENUM; } -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->kind != TYPE_ATOMIC) + if (type->kind != TYPE_ATOMIC) return false; - switch(type->atomic.akind) { - 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->kind == TYPE_ENUM) - return true; - - if(type->kind != TYPE_ATOMIC) - return false; - - switch(type->atomic.akind) { - 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 + if (type->kind == TYPE_ENUM) return true; + if (type->kind == TYPE_BITFIELD) + return is_type_signed(type->bitfield.base_type); - 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_VOID: - case ATOMIC_TYPE_INVALID: - case ATOMIC_TYPE_LAST: + 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(type->kind == TYPE_BITFIELD) - return true; - - if(is_type_integer(type) || is_type_floating(type)) + 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; + } +} - return false; +/** + * Returns true if the given type is an integer or float type. + * + * @param type The type to check. + * @return True if type is an integer or float type. + */ +bool is_type_real(const type_t *type) +{ + /* 6.2.5.17 */ + return is_type_integer(type) + || (type->kind == TYPE_ATOMIC && is_type_float(type)); } +/** + * 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)); @@ -533,12 +901,18 @@ bool is_type_scalar(const type_t *type) switch (type->kind) { case TYPE_POINTER: return true; case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type); - default: break; + 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)); @@ -548,28 +922,37 @@ bool is_type_incomplete(const type_t *type) 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_BITFIELD: - 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: panic("is_type_incomplete called without typerefs skipped"); - case TYPE_ERROR: - panic("error type found"); case TYPE_INVALID: break; } @@ -577,6 +960,14 @@ bool is_type_incomplete(const type_t *type) panic("invalid type found"); } +bool is_type_object(const type_t *type) +{ + return !is_type_function(type) && !is_type_incomplete(type); +} + +/** + * Check if two function types are compatible. + */ static bool function_types_compatible(const function_type_t *func1, const function_type_t *func2) { @@ -586,10 +977,13 @@ static bool function_types_compatible(const function_type_t *func1, return false; /* can parameters be compared? */ - if(func1->unspecified_parameters || func2->unspecified_parameters) + if (func1->unspecified_parameters || func2->unspecified_parameters) return true; - if(func1->variadic != func2->variadic) + if (func1->variadic != func2->variadic) + return false; + + if (func1->calling_convention != func2->calling_convention) return false; /* TODO: handling of unspecified parameters not correct yet */ @@ -597,7 +991,7 @@ static bool function_types_compatible(const function_type_t *func1, /* all argument types must be compatible */ function_parameter_t *parameter1 = func1->parameters; function_parameter_t *parameter2 = func2->parameters; - for( ; parameter1 != NULL && parameter2 != NULL; + 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); @@ -605,44 +999,48 @@ static bool function_types_compatible(const function_type_t *func1, parameter1_type = get_unqualified_type(parameter1_type); parameter2_type = get_unqualified_type(parameter2_type); - if(!types_compatible(parameter1_type, parameter2_type)) + if (!types_compatible(parameter1_type, parameter2_type)) return false; } /* same number of arguments? */ - if(parameter1 != NULL || parameter2 != NULL) + 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)) + if (!types_compatible(element_type1, element_type2)) return false; - if(array1->size != NULL && array2->size != NULL) { - /* TODO: check if size expression evaluate to the same value - * if they are constant */ - } + if (!array1->size_constant || !array2->size_constant) + return true; - 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)); /* shortcut: the same type is always compatible */ - if(type1 == type2) + if (type1 == type2) return true; - if(type1->base.qualifiers != type2->base.qualifiers) + if (type1->base.qualifiers != type2->base.qualifiers) return false; - if(type1->kind != type2->kind) + if (type1->kind != type2->kind) return false; switch(type1->kind) { @@ -650,6 +1048,10 @@ bool types_compatible(const type_t *type1, const type_t *type2) 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); @@ -685,23 +1087,13 @@ bool types_compatible(const type_t *type1, const type_t *type2) return false; } -bool pointers_compatible(const type_t *type1, const type_t *type2) -{ - assert(!is_typeref(type1)); - assert(!is_typeref(type2)); - - assert(type1->kind == TYPE_POINTER); - assert(type2->kind == TYPE_POINTER); - /* TODO */ - return true; -} - /** * Skip all typerefs and return the underlying type. */ type_t *skip_typeref(type_t *type) { - unsigned qualifiers = TYPE_QUALIFIER_NONE; + type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE; + type_modifiers_t modifiers = TYPE_MODIFIER_NONE; while(true) { switch(type->kind) { @@ -709,8 +1101,9 @@ type_t *skip_typeref(type_t *type) return type; case TYPE_TYPEDEF: { qualifiers |= type->base.qualifiers; + modifiers |= type->base.modifiers; const typedef_type_t *typedef_type = &type->typedeft; - if(typedef_type->resolved_type != NULL) { + if (typedef_type->resolved_type != NULL) { type = typedef_type->resolved_type; break; } @@ -719,10 +1112,10 @@ type_t *skip_typeref(type_t *type) } case TYPE_TYPEOF: { const typeof_type_t *typeof_type = &type->typeoft; - if(typeof_type->typeof_type != NULL) { + 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; } @@ -732,9 +1125,21 @@ type_t *skip_typeref(type_t *type) break; } - if (qualifiers != TYPE_QUALIFIER_NONE) { - type_t *const copy = duplicate_type(type); - copy->base.qualifiers |= qualifiers; + if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) { + type_t *const copy = duplicate_type(type); + + /* for const with typedefed array type the element type has to be + * adjusted */ + if (is_type_array(copy)) { + type_t *element_type = copy->array.element_type; + element_type = duplicate_type(element_type); + element_type->base.qualifiers |= qualifiers; + element_type->base.modifiers |= modifiers; + copy->array.element_type = element_type; + } else { + copy->base.qualifiers |= qualifiers; + copy->base.modifiers |= modifiers; + } type = typehash_insert(copy); if (type != copy) { @@ -745,29 +1150,174 @@ type_t *skip_typeref(type_t *type) 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); - if(result != type) { + if (result != type) { obstack_free(type_obst, type); } return result; } -type_t *make_atomic_type(atomic_type_kind_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->kind = TYPE_ATOMIC; type->base.qualifiers = qualifiers; - type->atomic.akind = atype; + 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->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)); @@ -775,13 +1325,33 @@ type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers) 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;