#include "adt/error.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 = true;
static void intern_print_type_pre(const type_t *type, bool top);
static void intern_print_type_post(const type_t *type, bool top);
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 atomic_type_t *type)
{
print_type_qualifiers(type->type.qualifiers);
const char *s;
- switch(type->atype) {
+ switch(type->akind) {
case ATOMIC_TYPE_INVALID: s = "INVALIDATOMIC"; break;
case ATOMIC_TYPE_VOID: s = "void"; break;
case ATOMIC_TYPE_BOOL: s = "_Bool"; break;
fputs(s, out);
}
+/**
+ * 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);
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... */
fputc('(', out);
- int first = 1;
- if(context == NULL) {
+ int first = 1;
+ if(scope == NULL) {
function_parameter_t *parameter = type->parameters;
for( ; parameter != NULL; parameter = parameter->next) {
if(first) {
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->variadic) {
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);
print_type_qualifiers(type->type.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, 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);
fputs("static ", out);
}
print_type_qualifiers(type->type.qualifiers);
- if(type->size != NULL) {
- print_expression(type->size);
+ 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);
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);
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 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);
}
+/**
+ * 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);
}
}
+/**
+ * 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);
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);
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("<error>", out);
case TYPE_INVALID:
- fputs("invalid", out);
+ fputs("<invalid>", out);
return;
case TYPE_ENUM:
print_type_enum(&type->enumt);
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) {
case TYPE_BITFIELD:
print_bitfield_type_post(&type->bitfield);
return;
+ case TYPE_ERROR:
case TYPE_INVALID:
case TYPE_ATOMIC:
case TYPE_ENUM:
}
}
+/**
+ * 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) {
fputs("nil type", out);
fputs(symbol->string, out);
}
if(type->kind == TYPE_FUNCTION) {
- print_function_type_post(&type->function, context, true);
+ 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_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
- * 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);
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 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;
}
+/**
+ * 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_ATOMIC)
return false;
- switch(type->atomic.atype) {
+ switch(type->atomic.akind) {
case ATOMIC_TYPE_BOOL:
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
}
}
-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)
return false;
- switch(type->atomic.atype) {
+ switch(type->atomic.akind) {
case ATOMIC_TYPE_FLOAT:
case ATOMIC_TYPE_DOUBLE:
case ATOMIC_TYPE_LONG_DOUBLE:
}
}
+/**
+ * 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));
if(type->kind != TYPE_ATOMIC)
return false;
- switch(type->atomic.atype) {
+ switch(type->atomic.akind) {
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
case ATOMIC_TYPE_SHORT:
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)
{
assert(!is_typeref(type));
if(type->kind == TYPE_BITFIELD)
return true;
- if(is_type_integer(type) || is_type_floating(type))
+ if(is_type_integer(type) || is_type_float(type))
return true;
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));
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));
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->array.size == NULL;
+ return type->array.size_expression == NULL;
case TYPE_ATOMIC:
- return type->atomic.atype == ATOMIC_TYPE_VOID;
+ return type->atomic.akind == ATOMIC_TYPE_VOID;
case TYPE_POINTER:
- case TYPE_ENUM:
case TYPE_BUILTIN:
+ case TYPE_ERROR:
return false;
case TYPE_TYPEDEF:
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)
{
return true;
}
+/**
+ * Check if two array types are compatible.
+ */
static bool array_types_compatible(const array_type_t *array1,
const array_type_t *array2)
{
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));
case TYPE_FUNCTION:
return function_types_compatible(&type1->function, &type2->function);
case TYPE_ATOMIC:
- return type1->atomic.atype == type2->atomic.atype;
+ return type1->atomic.akind == type2->atomic.akind;
case TYPE_ARRAY:
return array_types_compatible(&type1->array, &type2->array);
* 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:
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(type1->kind == TYPE_POINTER);
assert(type2->kind == TYPE_POINTER);
+ (void) type1;
+ (void) type2;
/* TODO */
return true;
}
+/**
+ * Skip all typerefs and return the underlying type.
+ */
type_t *skip_typeref(type_t *type)
{
- unsigned qualifiers = type->base.qualifiers;
+ 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(typeof_type->typeof_type != NULL) {
type = typeof_type->typeof_type;
} else {
- type = typeof_type->expression->base.datatype;
+ type = typeof_type->expression->base.type;
}
continue;
}
break;
}
- return type;
-}
+ 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;
+}
+/**
+ * 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 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 atype, 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.atype = atype;
+ type->atomic.akind = atype;
return identify_new_type(type);
}
+/**
+ * Creates a new pointer type.
+ *
+ * @param points_to The points-to type for teh 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));
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->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;