+/*
+ * This file is part of cparser.
+ * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
+ *
+ * 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 <config.h>
#include <stdio.h>
#include <assert.h>
+
#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 bool print_compound_entries;
+struct obstack *type_obst = &_type_obst;
+static int type_visited = 0;
+static bool print_implicit_array_size = false;
-static void intern_print_type_pre(type_t *type);
-static void intern_print_type_post(type_t *type);
+static void intern_print_type_pre(const type_t *type, bool top);
+static void intern_print_type_post(const type_t *type, bool top);
void init_types(void)
{
out = stream;
}
-void set_print_compound_entries(bool enabled)
-{
- print_compound_entries = enabled;
-}
-
void inc_type_visited(void)
{
type_visited++;
}
-void print_type_qualifiers(unsigned qualifiers)
+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);
}
+/**
+ * Prints the name of a atomic type.
+ *
+ * @param type The type.
+ */
static
-void print_atomic_type(const type_t *type)
-{
- print_type_qualifiers(type->qualifiers);
-
- const char *s;
- switch(type->v.atomic_type.atype) {
- case ATOMIC_TYPE_INVALID: s = "INVALIDATOMIC"; break;
- case ATOMIC_TYPE_VOID: s = "void"; break;
- case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
- case ATOMIC_TYPE_CHAR: s = "char"; break;
- case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
- case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
- case ATOMIC_TYPE_INT: s = "int"; break;
- case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
- case ATOMIC_TYPE_SHORT: s = "short"; break;
- case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
- case ATOMIC_TYPE_LONG: s = "long"; break;
- case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
- case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
- case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
- 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;
+void print_atomic_type(const atomic_type_t *type)
+{
+ print_type_qualifiers(type->type.qualifiers);
+
+ const char *s = "INVALIDATOMIC";
+ switch((atomic_type_kind_t) type->akind) {
+ 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;
+ case ATOMIC_TYPE_SCHAR: s = "signed char"; break;
+ case ATOMIC_TYPE_UCHAR: s = "unsigned char"; break;
+ case ATOMIC_TYPE_INT: s = "int"; break;
+ case ATOMIC_TYPE_UINT: s = "unsigned int"; break;
+ case ATOMIC_TYPE_SHORT: s = "short"; break;
+ case ATOMIC_TYPE_USHORT: s = "unsigned short"; break;
+ case ATOMIC_TYPE_LONG: s = "long"; break;
+ case ATOMIC_TYPE_ULONG: s = "unsigned long"; break;
+ case ATOMIC_TYPE_LONGLONG: s = "long long"; break;
+ case ATOMIC_TYPE_ULONGLONG: s = "unsigned long long"; break;
+ case ATOMIC_TYPE_LONG_DOUBLE: s = "long double"; break;
+ case ATOMIC_TYPE_FLOAT: s = "float"; break;
+ case ATOMIC_TYPE_DOUBLE: s = "double"; break;
+ case ATOMIC_TYPE_FLOAT_COMPLEX: s = "_Complex float"; break;
+ case ATOMIC_TYPE_DOUBLE_COMPLEX: s = "_Complex float"; break;
+ case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX: s = "_Complex float"; break;
+ case ATOMIC_TYPE_FLOAT_IMAGINARY: s = "_Imaginary float"; break;
+ case ATOMIC_TYPE_DOUBLE_IMAGINARY: s = "_Imaginary float"; break;
+ case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY: s = "_Imaginary float"; break;
}
fputs(s, out);
}
-static void print_function_type_pre(const type_t *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->qualifiers);
+ print_type_qualifiers(type->type.qualifiers);
- intern_print_type_pre(type->v.function_type.result_type);
+ intern_print_type_pre(type->return_type, false);
- /* TODO: don't emit braces if we're the toplevel type... */
- fputc('(', out);
+ /* don't emit braces if we're the toplevel type... */
+ if(!top)
+ fputc('(', out);
}
-static void print_function_type_post(const type_t *type,
- const context_t *context)
+/**
+ * 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 scope_t *scope, bool top)
{
- /* TODO: don't emit braces if we're the toplevel type... */
- intern_print_type_post(type->v.function_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) {
- function_parameter_t *parameter = type->v.function_type.parameters;
+ int first = 1;
+ if(scope == NULL) {
+ function_parameter_t *parameter = type->parameters;
for( ; parameter != NULL; parameter = parameter->next) {
if(first) {
first = 0;
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;
fputs(", ", out);
}
print_type_ext(parameter->type, parameter->symbol,
- ¶meter->context);
+ ¶meter->scope);
}
}
- if(type->v.function_type.variadic) {
+ if(type->variadic) {
if(first) {
first = 0;
} else {
}
fputs("...", out);
}
- if(first && !type->v.function_type.unspecified_parameters) {
+ if(first && !type->unspecified_parameters) {
fputs("void", out);
}
fputc(')', out);
}
-static void print_pointer_type_pre(const type_t *type)
+/**
+ * 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->v.pointer_type.points_to);
+ intern_print_type_pre(type->points_to, false);
fputs("*", out);
- print_type_qualifiers(type->qualifiers);
+ print_type_qualifiers(type->type.qualifiers);
}
-static void print_pointer_type_post(const type_t *type)
+/**
+ * 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->v.pointer_type.points_to);
+ intern_print_type_post(type->points_to, false);
}
-static void print_array_type_pre(const type_t *type)
+/**
+ * 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->v.array_type.element_type);
+ intern_print_type_pre(type->element_type, false);
}
-static void print_array_type_post(const type_t *type)
+/**
+ * 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->v.array_type.is_static) {
+ if(type->is_static) {
fputs("static ", out);
}
- print_type_qualifiers(type->qualifiers);
- if(type->v.array_type.size != NULL) {
- print_expression(type->v.array_type.size);
+ print_type_qualifiers(type->type.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->v.array_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, false);
}
+/**
+ * Prints an enum definition.
+ *
+ * @param declaration The enum's type declaration.
+ */
void print_enum_definition(const declaration_t *declaration)
{
fputs("{\n", out);
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");
}
fputs("}", out);
}
-static void print_type_enum(const type_t *type)
+/**
+ * Prints an enum type.
+ *
+ * @param type The enum type.
+ */
+static void print_type_enum(const enum_type_t *type)
{
- print_type_qualifiers(type->qualifiers);
+ print_type_qualifiers(type->type.qualifiers);
fputs("enum ", out);
- declaration_t *declaration = type->v.enum_type.declaration;
+ declaration_t *declaration = type->declaration;
symbol_t *symbol = declaration->symbol;
if(symbol != NULL) {
fputs(symbol->string, out);
}
}
+/**
+ * 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);
fputs("}", out);
}
-static void print_compound_type(const type_t *type)
+/**
+ * Prints a compound type.
+ *
+ * @param type The compound type.
+ */
+static void print_compound_type(const compound_type_t *type)
{
- print_type_qualifiers(type->qualifiers);
+ print_type_qualifiers(type->type.qualifiers);
- if(type->type == TYPE_COMPOUND_STRUCT) {
+ if(type->type.kind == TYPE_COMPOUND_STRUCT) {
fputs("struct ", out);
} else {
- assert(type->type == TYPE_COMPOUND_UNION);
+ assert(type->type.kind == TYPE_COMPOUND_UNION);
fputs("union ", out);
}
- declaration_t *declaration = type->v.compound_type.declaration;
+ declaration_t *declaration = type->declaration;
symbol_t *symbol = declaration->symbol;
if(symbol != NULL) {
fputs(symbol->string, out);
}
}
-static void print_typedef_type_pre(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)
{
- fputs(type->v.typedef_type.declaration->symbol->string, out);
+ print_type_qualifiers(type->type.qualifiers);
+ fputs(type->declaration->symbol->string, out);
}
-static void print_typeof_type_pre(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->v.typeof_type.expression != NULL) {
- assert(type->v.typeof_type.typeof_type == NULL);
- print_expression(type->v.typeof_type.expression);
+ if(type->expression != NULL) {
+ assert(type->typeof_type == NULL);
+ print_expression(type->expression);
} else {
- print_type(type->v.typeof_type.typeof_type);
+ print_type(type->typeof_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("<error>", out);
case TYPE_INVALID:
- fputs("invalid", out);
+ fputs("<invalid>", out);
return;
case TYPE_ENUM:
- print_type_enum(type);
+ print_type_enum(&type->enumt);
return;
case TYPE_ATOMIC:
- print_atomic_type(type);
+ print_atomic_type(&type->atomic);
return;
case TYPE_COMPOUND_STRUCT:
case TYPE_COMPOUND_UNION:
- print_compound_type(type);
+ print_compound_type(&type->compound);
return;
case TYPE_BUILTIN:
- fputs(type->v.builtin_type.symbol->string, out);
+ fputs(type->builtin.symbol->string, out);
return;
case TYPE_FUNCTION:
- print_function_type_pre(type);
+ print_function_type_pre(&type->function, top);
return;
case TYPE_POINTER:
- print_pointer_type_pre(type);
+ print_pointer_type_pre(&type->pointer);
+ return;
+ case TYPE_BITFIELD:
+ intern_print_type_pre(type->bitfield.base, top);
return;
case TYPE_ARRAY:
- print_array_type_pre(type);
+ print_array_type_pre(&type->array);
return;
case TYPE_TYPEDEF:
- print_typedef_type_pre(type);
+ print_typedef_type_pre(&type->typedeft);
return;
case TYPE_TYPEOF:
- print_typeof_type_pre(type);
+ print_typeof_type_pre(&type->typeoft);
return;
}
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, NULL);
+ print_function_type_post(&type->function, NULL, top);
return;
case TYPE_POINTER:
- print_pointer_type_post(type);
+ print_pointer_type_post(&type->pointer);
return;
case TYPE_ARRAY:
- print_array_type_post(type);
+ 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_ENUM:
}
}
-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(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_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;
}
+/**
+ * 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)
{
- if(type->type == TYPE_ENUM)
+ assert(!is_typeref(type));
+
+ if(type->kind == TYPE_ENUM)
return true;
- if(type->type != TYPE_ATOMIC)
+ if(type->kind != TYPE_ATOMIC)
return false;
- switch(type->v.atomic_type.atype) {
+ switch((atomic_type_kind_t) type->atomic.akind) {
case ATOMIC_TYPE_BOOL:
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
case ATOMIC_TYPE_LONGLONG:
case ATOMIC_TYPE_ULONGLONG:
return true;
- default:
+
+ case ATOMIC_TYPE_INVALID:
+ case ATOMIC_TYPE_VOID:
+ case ATOMIC_TYPE_FLOAT:
+ case ATOMIC_TYPE_DOUBLE:
+ case ATOMIC_TYPE_LONG_DOUBLE:
+ 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:
return false;
}
+
+ panic("unexpected atomic type kind");
}
-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)
{
- if(type->type != TYPE_ATOMIC)
+ assert(!is_typeref(type));
+
+ if(type->kind != TYPE_ATOMIC)
return false;
- switch(type->v.atomic_type.atype) {
+ switch((atomic_type_kind_t) 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:
+
+ case ATOMIC_TYPE_INVALID:
+ case ATOMIC_TYPE_VOID:
+ 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 false;
}
+
+ panic("unexpected atomic type kind");
}
+/**
+ * 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->type != TYPE_ATOMIC)
+ if(type->kind != TYPE_ATOMIC)
return false;
- switch(type->v.atomic_type.atype) {
+ switch((atomic_type_kind_t) type->atomic.akind) {
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
case ATOMIC_TYPE_SHORT:
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_ULONGLONG:
return false;
- case ATOMIC_TYPE_INVALID:
case ATOMIC_TYPE_VOID:
+ case ATOMIC_TYPE_INVALID:
return false;
}
return false;
}
+/**
+ * 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)
{
- if(is_type_integer(type) || is_type_floating(type))
- return 1;
+ assert(!is_typeref(type));
+
+ if(type->kind == TYPE_BITFIELD)
+ return true;
+
+ if(is_type_integer(type) || is_type_float(type))
+ return true;
- return 0;
+ 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)
{
- if(type->type == TYPE_POINTER)
- return 1;
+ assert(!is_typeref(type));
+
+ 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)
{
- switch(type->type) {
+ assert(!is_typeref(type));
+
+ switch(type->kind) {
case TYPE_COMPOUND_STRUCT:
case TYPE_COMPOUND_UNION: {
- declaration_t *declaration = type->v.compound_type.declaration;
+ const compound_type_t *compound_type = &type->compound;
+ declaration_t *declaration = compound_type->declaration;
+ return !declaration->init.is_defined;
+ }
+ case TYPE_ENUM: {
+ const enum_type_t *enum_type = &type->enumt;
+ declaration_t *declaration = enum_type->declaration;
return !declaration->init.is_defined;
}
+ case TYPE_BITFIELD:
case TYPE_FUNCTION:
return true;
case TYPE_ARRAY:
- return type->v.array_type.size == NULL;
+ return type->array.size_expression == NULL;
case TYPE_ATOMIC:
+ return type->atomic.akind == ATOMIC_TYPE_VOID;
+
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;
panic("invalid type found");
}
-bool types_compatible(const type_t *type1, const type_t *type2)
+/**
+ * Check if two function types are compatible.
+ */
+static bool function_types_compatible(const function_type_t *func1,
+ const function_type_t *func2)
{
- /* TODO: really incomplete */
- if(type1 == type2)
+ 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(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC)
- return type1->v.atomic_type.atype == type2->v.atomic_type.atype;
+ if(func1->variadic != func2->variadic)
+ return false;
- 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;
}
-bool pointers_compatible(const type_t *type1, const type_t *type2)
+/**
+ * Check if two array types are compatible.
+ */
+static bool array_types_compatible(const array_type_t *array1,
+ const array_type_t *array2)
{
- assert(type1->type == TYPE_POINTER);
- assert(type2->type == TYPE_POINTER);
-#if 0
- return types_compatible(type1->v.pointer_type.points_to,
- type2->v.pointer_type.points_to);
-#endif
- return true;
+ 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;
}
/**
- * duplicates a type
- * note that this does not produce a deep copy!
+ * Check if two types are compatible.
*/
-static type_t *duplicate_type(type_t *type)
+bool types_compatible(const type_t *type1, const type_t *type2)
{
- type_t *copy = obstack_alloc(type_obst, sizeof(*copy));
- memcpy(copy, type, sizeof(*copy));
+ assert(!is_typeref(type1));
+ assert(!is_typeref(type2));
- (void) duplicate_type;
+ /* shortcut: the same type is always compatible */
+ if(type1 == type2)
+ return true;
- return type;
+ 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_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;
}
-type_t *skip_typeref(type_t *type)
+/**
+ * Check if two pointer types are compatible.
+ */
+bool pointers_compatible(const type_t *type1, const type_t *type2)
{
- unsigned qualifiers = type->qualifiers;
+ assert(!is_typeref(type1));
+ assert(!is_typeref(type2));
+
+ assert(type1->kind == TYPE_POINTER);
+ assert(type2->kind == TYPE_POINTER);
+ (void) type1;
+ (void) type2;
+ /* TODO */
+ return true;
+}
- while(1) {
- switch(type->type) {
- case TYPE_TYPEDEF:
- qualifiers |= type->qualifiers;
- if(type->v.typedef_type.resolved_type != NULL) {
- type = type->v.typedef_type.resolved_type;
+/**
+ * Skip all typerefs and return the underlying type.
+ */
+type_t *skip_typeref(type_t *type)
+{
+ unsigned qualifiers = TYPE_QUALIFIER_NONE;
+
+ 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;
+ if(typedef_type->resolved_type != NULL) {
+ type = typedef_type->resolved_type;
break;
}
- type = type->v.typedef_type.declaration->type;
+ type = typedef_type->declaration->type;
continue;
- case TYPE_TYPEOF:
- if(type->v.typeof_type.typeof_type != NULL) {
- type = type->v.typeof_type.typeof_type;
+ }
+ case TYPE_TYPEOF: {
+ const typeof_type_t *typeof_type = &type->typeoft;
+ if(typeof_type->typeof_type != NULL) {
+ type = typeof_type->typeof_type;
} else {
- type = type->v.typeof_type.expression->datatype;
+ type = typeof_type->expression->base.type;
}
continue;
- case TYPE_BUILTIN:
- type = type->v.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)
+{
+ switch(kind) {
+ case ATOMIC_TYPE_CHAR:
+ case ATOMIC_TYPE_SCHAR:
+ case ATOMIC_TYPE_UCHAR:
+ return 1;
+
+ case ATOMIC_TYPE_SHORT:
+ case ATOMIC_TYPE_USHORT:
+ return 2;
+
+ case ATOMIC_TYPE_BOOL:
+ case ATOMIC_TYPE_INT:
+ case ATOMIC_TYPE_UINT:
+ return machine_size >> 3;
+
+ case ATOMIC_TYPE_LONG:
+ case ATOMIC_TYPE_ULONG:
+ return machine_size > 16 ? machine_size >> 3 : 4;
+
+ case ATOMIC_TYPE_LONGLONG:
+ case ATOMIC_TYPE_ULONGLONG:
+ return machine_size > 16 ? 8 : 4;
+
+ case ATOMIC_TYPE_FLOAT_IMAGINARY:
+ case ATOMIC_TYPE_FLOAT:
+ return 4;
+
+ case ATOMIC_TYPE_DOUBLE_IMAGINARY:
+ case ATOMIC_TYPE_DOUBLE:
+ return 8;
+
+ case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
+ case ATOMIC_TYPE_LONG_DOUBLE:
+ return 12;
+
+ case ATOMIC_TYPE_VOID:
+ return 1;
+
+ case ATOMIC_TYPE_FLOAT_COMPLEX:
+ return 2 * get_atomic_type_size(ATOMIC_TYPE_FLOAT);
+
+ case ATOMIC_TYPE_DOUBLE_COMPLEX:
+ return 2 * get_atomic_type_size(ATOMIC_TYPE_DOUBLE);
+
+ case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
+ return 2 * get_atomic_type_size(ATOMIC_TYPE_LONG_DOUBLE);
+
+ case ATOMIC_TYPE_INVALID:
+ break;
+ }
+ panic("Trying to determine size of invalid atomic type");
+}
+
+/**
+ * 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);
return result;
}
-type_t *make_atomic_type(atomic_type_type_t type, 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 atype, type_qualifiers_t qualifiers)
{
- type_t *atomic_type = obstack_alloc(type_obst, sizeof(atomic_type[0]));
- memset(atomic_type, 0, sizeof(atomic_type[0]));
- atomic_type->type = TYPE_ATOMIC;
- atomic_type->qualifiers = qualifiers;
- atomic_type->v.atomic_type.atype = type;
+ type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
+ memset(type, 0, sizeof(atomic_type_t));
- return identify_new_type(atomic_type);
+ type->kind = TYPE_ATOMIC;
+ type->base.qualifiers = qualifiers;
+ type->base.alignment = 0;
+ type->atomic.akind = atype;
+
+ /* TODO: set the alignment depending on the atype here */
+
+ 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 *pointer_type = obstack_alloc(type_obst, sizeof(pointer_type[0]));
- memset(pointer_type, 0, sizeof(pointer_type[0]));
- pointer_type->type = TYPE_POINTER;
- pointer_type->qualifiers = qualifiers;
- pointer_type->v.pointer_type.points_to = points_to;
+ type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
+ memset(type, 0, sizeof(pointer_type_t));
- return identify_new_type(pointer_type);
+ 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;
projects / cparser / blobdiff