struct obstack *type_obst = &_type_obst;
static FILE *out;
static int type_visited = 0;
-static bool print_compound_entries;
-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);
fputs(s, out);
}
-static void print_function_type_pre(const function_type_t *type)
+static void print_function_type_pre(const function_type_t *type, bool top)
{
print_type_qualifiers(type->type.qualifiers);
- intern_print_type_pre(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 function_type_t *type,
- const context_t *context)
+ const context_t *context, 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);
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);
}
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);
}
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);
}
static void print_array_type_post(const array_type_t *type)
print_expression(type->size);
}
fputc(']', out);
- intern_print_type_post(type->element_type);
+ intern_print_type_post(type->element_type, false);
+}
+
+static void print_bitfield_type_post(const bitfield_type_t *type)
+{
+ fputs(" : ", out);
+ print_expression(type->size);
+ intern_print_type_post(type->base, false);
}
void print_enum_definition(const declaration_t *declaration)
{
print_type_qualifiers(type->type.qualifiers);
- if(type->type.type == TYPE_COMPOUND_STRUCT) {
+ if(type->type.kind == TYPE_COMPOUND_STRUCT) {
fputs("struct ", out);
} else {
- assert(type->type.type == TYPE_COMPOUND_UNION);
+ assert(type->type.kind == TYPE_COMPOUND_UNION);
fputs("union ", out);
}
}
}
-static void print_typedef_type_pre(typedef_type_t *type)
+static void print_typedef_type_pre(const typedef_type_t *const type)
{
fputs(type->declaration->symbol->string, out);
}
-static void print_typeof_type_pre(typeof_type_t *type)
+static void print_typeof_type_pre(const typeof_type_t *const type)
{
fputs("typeof(", out);
if(type->expression != NULL) {
fputc(')', out);
}
-static void intern_print_type_pre(type_t *type)
+static void intern_print_type_pre(const type_t *const type, const bool top)
{
- switch(type->type) {
+ switch(type->kind) {
case TYPE_INVALID:
fputs("invalid", out);
return;
case TYPE_ENUM:
- print_type_enum((enum_type_t*) type);
+ print_type_enum(&type->enumt);
return;
case TYPE_ATOMIC:
- print_atomic_type((atomic_type_t*) type);
+ print_atomic_type(&type->atomic);
return;
case TYPE_COMPOUND_STRUCT:
case TYPE_COMPOUND_UNION:
- print_compound_type((compound_type_t*) type);
+ print_compound_type(&type->compound);
return;
case TYPE_BUILTIN:
- fputs(((builtin_type_t*) type)->symbol->string, out);
+ fputs(type->builtin.symbol->string, out);
return;
case TYPE_FUNCTION:
- print_function_type_pre((function_type_t*) type);
+ print_function_type_pre(&type->function, top);
return;
case TYPE_POINTER:
- print_pointer_type_pre((pointer_type_t*) 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((array_type_t*) type);
+ print_array_type_pre(&type->array);
return;
case TYPE_TYPEDEF:
- print_typedef_type_pre((typedef_type_t*) type);
+ print_typedef_type_pre(&type->typedeft);
return;
case TYPE_TYPEOF:
- print_typeof_type_pre((typeof_type_t*) type);
+ print_typeof_type_pre(&type->typeoft);
return;
}
fputs("unknown", out);
}
-static void intern_print_type_post(type_t *type)
+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((const function_type_t*) type, NULL);
+ print_function_type_post(&type->function, NULL, top);
return;
case TYPE_POINTER:
- print_pointer_type_post((const pointer_type_t*) type);
+ print_pointer_type_post(&type->pointer);
return;
case TYPE_ARRAY:
- print_array_type_post((const array_type_t*) type);
+ print_array_type_post(&type->array);
+ return;
+ case TYPE_BITFIELD:
+ print_bitfield_type_post(&type->bitfield);
return;
case TYPE_INVALID:
case TYPE_ATOMIC:
}
}
-void print_type(type_t *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,
+void print_type_ext(const type_t *const type, const symbol_t *symbol,
const context_t *context)
{
if(type == NULL) {
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, context, true);
} else {
- intern_print_type_post(type);
+ intern_print_type_post(type, true);
+ }
+}
+
+static size_t get_type_size(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_INVALID: panic("invalid type found");
+ }
+ panic("unknown type found");
+}
+
+/**
+ * duplicates a type
+ * note that this does not produce a deep copy!
+ */
+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);
+
+ return copy;
+}
+
+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;
}
bool type_valid(const type_t *type)
{
- return type->type != TYPE_INVALID;
+ return type->kind != TYPE_INVALID;
}
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->type != TYPE_ATOMIC)
+ if(type->kind != TYPE_ATOMIC)
return false;
- atomic_type_t *atomic_type = (atomic_type_t*) type;
- switch(atomic_type->atype) {
+ switch(type->atomic.atype) {
case ATOMIC_TYPE_BOOL:
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
{
assert(!is_typeref(type));
- if(type->type != TYPE_ATOMIC)
+ if(type->kind != TYPE_ATOMIC)
return false;
- atomic_type_t *atomic_type = (atomic_type_t*) type;
- switch(atomic_type->atype) {
+ switch(type->atomic.atype) {
case ATOMIC_TYPE_FLOAT:
case ATOMIC_TYPE_DOUBLE:
case ATOMIC_TYPE_LONG_DOUBLE:
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;
- atomic_type_t *atomic_type = (atomic_type_t*) type;
- switch(atomic_type->atype) {
+ switch(type->atomic.atype) {
case ATOMIC_TYPE_CHAR:
case ATOMIC_TYPE_SCHAR:
case ATOMIC_TYPE_SHORT:
case ATOMIC_TYPE_ULONGLONG:
return false;
- case ATOMIC_TYPE_INVALID:
case ATOMIC_TYPE_VOID:
+ case ATOMIC_TYPE_INVALID:
+ case ATOMIC_TYPE_LAST:
return false;
}
{
assert(!is_typeref(type));
+ if(type->kind == TYPE_BITFIELD)
+ return true;
+
if(is_type_integer(type) || is_type_floating(type))
- return 1;
+ return true;
- return 0;
+ return false;
}
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);
}
{
assert(!is_typeref(type));
- switch(type->type) {
+ switch(type->kind) {
case TYPE_COMPOUND_STRUCT:
case TYPE_COMPOUND_UNION: {
- const compound_type_t *compound_type
- = (const compound_type_t*) type;
- declaration_t *declaration = compound_type->declaration;
+ const compound_type_t *compound_type = &type->compound;
+ declaration_t *declaration = compound_type->declaration;
return !declaration->init.is_defined;
}
+ case TYPE_BITFIELD:
case TYPE_FUNCTION:
return true;
- case TYPE_ARRAY: {
- const array_type_t *array_type = (const array_type_t*) type;
-
- return array_type->size == NULL;
- }
+ case TYPE_ARRAY:
+ return type->array.size == NULL;
case TYPE_ATOMIC:
+ return type->atomic.atype == ATOMIC_TYPE_VOID;
+
case TYPE_POINTER:
case TYPE_ENUM:
+ case TYPE_BUILTIN:
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)
+static bool function_types_compatible(const function_type_t *func1,
+ const function_type_t *func2)
{
- assert(!is_typeref(type1));
- assert(!is_typeref(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;
- /* TODO: really incomplete */
- if(type1 == type2)
+ /* can parameters be compared? */
+ if(func1->unspecified_parameters || func2->unspecified_parameters)
return true;
- if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) {
- const atomic_type_t *atomic1 = (const atomic_type_t*) type1;
- const atomic_type_t *atomic2 = (const atomic_type_t*) type2;
+ 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);
- return atomic1->atype == atomic2->atype;
+ 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 false;
+ return true;
}
-bool pointers_compatible(const type_t *type1, const type_t *type2)
+static bool array_types_compatible(const array_type_t *array1,
+ const array_type_t *array2)
{
- assert(!is_typeref(type1));
- assert(!is_typeref(type2));
+ 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 != NULL && array2->size != NULL) {
+ /* TODO: check if size expression evaluate to the same value
+ * if they are constant */
+ }
- assert(type1->type == TYPE_POINTER);
- assert(type2->type == TYPE_POINTER);
-#if 0
- pointer_type_t *pointer_type1 = (pointer_type_t*) type1;
- pointer_type_t *pointer_type2 = (pointer_type_t*) type2;
- return types_compatible(pointer_type1->points_to,
- pointer_type2->points_to);
-#endif
return true;
}
-static size_t get_type_size(type_t *type)
+bool types_compatible(const type_t *type1, const type_t *type2)
{
- switch(type->type) {
- case TYPE_ATOMIC: return sizeof(atomic_type_t); break;
+ assert(!is_typeref(type1));
+ assert(!is_typeref(type2));
+
+ /* shortcut: the same type is always compatible */
+ if(type1 == type2)
+ return true;
+
+ 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.atype == type2->atomic.atype;
+ 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: 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;
+ 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_INVALID:
+ panic("invalid type found in compatible types");
+ case TYPE_TYPEDEF:
+ case TYPE_TYPEOF:
+ panic("typerefs not skipped in compatible types?!?");
}
- panic("unknown type found");
+
+ /* TODO: incomplete */
+ return false;
}
-/**
- * duplicates a type
- * note that this does not produce a deep copy!
- */
-static type_t *duplicate_type(type_t *type)
+bool pointers_compatible(const type_t *type1, const type_t *type2)
{
- size_t size = get_type_size(type);
-
- type_t *copy = obstack_alloc(type_obst, size);
- memcpy(copy, type, size);
-
- (void) duplicate_type;
+ assert(!is_typeref(type1));
+ assert(!is_typeref(type2));
- return type;
+ assert(type1->kind == TYPE_POINTER);
+ assert(type2->kind == TYPE_POINTER);
+ /* TODO */
+ return true;
}
type_t *skip_typeref(type_t *type)
{
- unsigned qualifiers = type->qualifiers;
+ unsigned qualifiers = type->base.qualifiers;
- while(1) {
- switch(type->type) {
+ while(true) {
+ switch(type->kind) {
case TYPE_TYPEDEF: {
- qualifiers |= type->qualifiers;
- const typedef_type_t *typedef_type = (const typedef_type_t*) type;
+ qualifiers |= type->base.qualifiers;
+ const typedef_type_t *typedef_type = &type->typedeft;
if(typedef_type->resolved_type != NULL) {
type = typedef_type->resolved_type;
break;
continue;
}
case TYPE_TYPEOF: {
- const typeof_type_t *typeof_type = (const typeof_type_t *) type;
+ const typeof_type_t *typeof_type = &type->typeoft;
if(typeof_type->typeof_type != NULL) {
type = typeof_type->typeof_type;
} else {
- type = typeof_type->expression->datatype;
+ type = typeof_type->expression->base.datatype;
}
continue;
}
- case TYPE_BUILTIN: {
- const builtin_type_t *builtin_type = (const builtin_type_t*) type;
- type = builtin_type->real_type;
- continue;
- }
default:
break;
}
return result;
}
-type_t *make_atomic_type(atomic_type_type_t type, type_qualifiers_t qualifiers)
+type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers)
{
- atomic_type_t *atomic_type
- = obstack_alloc(type_obst, sizeof(atomic_type[0]));
- memset(atomic_type, 0, sizeof(atomic_type[0]));
- atomic_type->type.type = TYPE_ATOMIC;
- atomic_type->type.qualifiers = qualifiers;
- atomic_type->atype = type;
+ 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;
- return identify_new_type((type_t*) atomic_type);
+ return identify_new_type(type);
}
type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
{
- pointer_type_t *pointer_type
- = obstack_alloc(type_obst, sizeof(pointer_type[0]));
- memset(pointer_type, 0, sizeof(pointer_type[0]));
- pointer_type->type.type = TYPE_POINTER;
- pointer_type->type.qualifiers = qualifiers;
- pointer_type->points_to = points_to;
+ type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
+ memset(type, 0, sizeof(pointer_type_t));
+
+ type->kind = TYPE_POINTER;
+ type->base.qualifiers = qualifiers;
+ type->pointer.points_to = points_to;
- return identify_new_type((type_t*) pointer_type);
+ return identify_new_type(type);
}
static __attribute__((unused))
projects / cparser / blobdiff