godot/core/variant.h
2020-04-02 13:38:00 +02:00

520 lines
16 KiB
C++

/*************************************************************************/
/* variant.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef VARIANT_H
#define VARIANT_H
#include "core/array.h"
#include "core/callable.h"
#include "core/color.h"
#include "core/dictionary.h"
#include "core/io/ip_address.h"
#include "core/math/aabb.h"
#include "core/math/basis.h"
#include "core/math/face3.h"
#include "core/math/plane.h"
#include "core/math/quat.h"
#include "core/math/transform.h"
#include "core/math/transform_2d.h"
#include "core/math/vector3.h"
#include "core/math/vector3i.h"
#include "core/node_path.h"
#include "core/object_id.h"
#include "core/rid.h"
#include "core/ustring.h"
class Object;
class Node; // helper
class Control; // helper
struct PropertyInfo;
struct MethodInfo;
typedef Vector<uint8_t> PackedByteArray;
typedef Vector<int32_t> PackedInt32Array;
typedef Vector<int64_t> PackedInt64Array;
typedef Vector<float> PackedFloat32Array;
typedef Vector<double> PackedFloat64Array;
typedef Vector<String> PackedStringArray;
typedef Vector<Vector2> PackedVector2Array;
typedef Vector<Vector3> PackedVector3Array;
typedef Vector<Color> PackedColorArray;
// Temporary workaround until c++11 alignas()
#ifdef __GNUC__
#define GCC_ALIGNED_8 __attribute__((aligned(8)))
#else
#define GCC_ALIGNED_8
#endif
class Variant {
public:
// If this changes the table in variant_op must be updated
enum Type {
NIL,
// atomic types
BOOL,
INT,
FLOAT,
STRING,
// math types
VECTOR2,
VECTOR2I,
RECT2,
RECT2I,
VECTOR3,
VECTOR3I,
TRANSFORM2D,
PLANE,
QUAT,
AABB,
BASIS,
TRANSFORM,
// misc types
COLOR,
STRING_NAME,
NODE_PATH,
_RID,
OBJECT,
CALLABLE,
SIGNAL,
DICTIONARY,
ARRAY,
// typed arrays
PACKED_BYTE_ARRAY,
PACKED_INT32_ARRAY,
PACKED_INT64_ARRAY,
PACKED_FLOAT32_ARRAY,
PACKED_FLOAT64_ARRAY,
PACKED_STRING_ARRAY,
PACKED_VECTOR2_ARRAY,
PACKED_VECTOR3_ARRAY,
PACKED_COLOR_ARRAY,
VARIANT_MAX
};
private:
friend struct _VariantCall;
// Variant takes 20 bytes when real_t is float, and 36 if double
// it only allocates extra memory for aabb/matrix.
Type type;
struct ObjData {
ObjectID id;
Object *obj;
};
/* array helpers */
struct PackedArrayRefBase {
SafeRefCount refcount;
_FORCE_INLINE_ PackedArrayRefBase *reference() {
if (this->refcount.ref()) {
return this;
} else {
return nullptr;
}
}
static _FORCE_INLINE_ PackedArrayRefBase *reference_from(PackedArrayRefBase *p_base, PackedArrayRefBase *p_from) {
if (p_base == p_from) {
return p_base; //same thing, do nothing
}
if (p_from->reference()) {
if (p_base->refcount.unref()) {
memdelete(p_base);
}
return p_from;
} else {
return p_base; //keep, could not reference new
}
}
static _FORCE_INLINE_ void destroy(PackedArrayRefBase *p_array) {
if (p_array->refcount.unref()) {
memdelete(p_array);
}
}
_FORCE_INLINE_ virtual ~PackedArrayRefBase() {} //needs virtual destructor, but make inline
};
template <class T>
struct PackedArrayRef : public PackedArrayRefBase {
Vector<T> array;
static _FORCE_INLINE_ PackedArrayRef<T> *create() {
return memnew(PackedArrayRef<T>);
}
static _FORCE_INLINE_ PackedArrayRef<T> *create(const Vector<T> &p_from) {
return memnew(PackedArrayRef<T>(p_from));
}
static _FORCE_INLINE_ const Vector<T> &get_array(PackedArrayRefBase *p_base) {
return static_cast<PackedArrayRef<T> *>(p_base)->array;
}
static _FORCE_INLINE_ Vector<T> *get_array_ptr(const PackedArrayRefBase *p_base) {
return &const_cast<PackedArrayRef<T> *>(static_cast<const PackedArrayRef<T> *>(p_base))->array;
}
_FORCE_INLINE_ PackedArrayRef(const Vector<T> &p_from) {
array = p_from;
refcount.init();
}
_FORCE_INLINE_ PackedArrayRef() {
refcount.init();
}
};
/* end of array helpers */
_ALWAYS_INLINE_ ObjData &_get_obj();
_ALWAYS_INLINE_ const ObjData &_get_obj() const;
union {
bool _bool;
int64_t _int;
double _float;
Transform2D *_transform2d;
::AABB *_aabb;
Basis *_basis;
Transform *_transform;
PackedArrayRefBase *packed_array;
void *_ptr; //generic pointer
uint8_t _mem[sizeof(ObjData) > (sizeof(real_t) * 4) ? sizeof(ObjData) : (sizeof(real_t) * 4)];
} _data GCC_ALIGNED_8;
void reference(const Variant &p_variant);
void clear();
public:
_FORCE_INLINE_ Type get_type() const {
return type;
}
static String get_type_name(Variant::Type p_type);
static bool can_convert(Type p_type_from, Type p_type_to);
static bool can_convert_strict(Type p_type_from, Type p_type_to);
bool is_ref() const;
_FORCE_INLINE_ bool is_num() const {
return type == INT || type == FLOAT;
};
_FORCE_INLINE_ bool is_array() const {
return type >= ARRAY;
};
bool is_shared() const;
bool is_zero() const;
bool is_one() const;
bool is_null() const;
operator bool() const;
operator signed int() const;
operator unsigned int() const; // this is the real one
operator signed short() const;
operator unsigned short() const;
operator signed char() const;
operator unsigned char() const;
//operator long unsigned int() const;
operator int64_t() const;
operator uint64_t() const;
#ifdef NEED_LONG_INT
operator signed long() const;
operator unsigned long() const;
#endif
operator ObjectID() const;
operator CharType() const;
operator float() const;
operator double() const;
operator String() const;
operator StringName() const;
operator Vector2() const;
operator Vector2i() const;
operator Rect2() const;
operator Rect2i() const;
operator Vector3() const;
operator Vector3i() const;
operator Plane() const;
operator ::AABB() const;
operator Quat() const;
operator Basis() const;
operator Transform() const;
operator Transform2D() const;
operator Color() const;
operator NodePath() const;
operator RID() const;
operator Object *() const;
operator Node *() const;
operator Control *() const;
operator Callable() const;
operator Signal() const;
operator Dictionary() const;
operator Array() const;
operator Vector<uint8_t>() const;
operator Vector<int32_t>() const;
operator Vector<int64_t>() const;
operator Vector<float>() const;
operator Vector<double>() const;
operator Vector<String>() const;
operator Vector<Vector3>() const;
operator Vector<Color>() const;
operator Vector<Plane>() const;
operator Vector<Face3>() const;
operator Vector<Variant>() const;
operator Vector<StringName>() const;
operator Vector<RID>() const;
operator Vector<Vector2>() const;
// some core type enums to convert to
operator Margin() const;
operator Orientation() const;
operator IP_Address() const;
Object *get_validated_object() const;
Object *get_validated_object_with_check(bool &r_previously_freed) const;
Variant(bool p_bool);
Variant(signed int p_int); // real one
Variant(unsigned int p_int);
#ifdef NEED_LONG_INT
Variant(signed long p_long); // real one
Variant(unsigned long p_long);
//Variant(long unsigned int p_long);
#endif
Variant(signed short p_short); // real one
Variant(unsigned short p_short);
Variant(signed char p_char); // real one
Variant(unsigned char p_char);
Variant(int64_t p_int); // real one
Variant(uint64_t p_int);
Variant(float p_float);
Variant(double p_double);
Variant(const ObjectID &p_id);
Variant(const String &p_string);
Variant(const StringName &p_string);
Variant(const char *const p_cstring);
Variant(const CharType *p_wstring);
Variant(const Vector2 &p_vector2);
Variant(const Vector2i &p_vector2i);
Variant(const Rect2 &p_rect2);
Variant(const Rect2i &p_rect2i);
Variant(const Vector3 &p_vector3);
Variant(const Vector3i &p_vector3i);
Variant(const Plane &p_plane);
Variant(const ::AABB &p_aabb);
Variant(const Quat &p_quat);
Variant(const Basis &p_matrix);
Variant(const Transform2D &p_transform);
Variant(const Transform &p_transform);
Variant(const Color &p_color);
Variant(const NodePath &p_node_path);
Variant(const RID &p_rid);
Variant(const Object *p_object);
Variant(const Callable &p_callable);
Variant(const Signal &p_signal);
Variant(const Dictionary &p_dictionary);
Variant(const Array &p_array);
Variant(const Vector<Plane> &p_array); // helper
Variant(const Vector<uint8_t> &p_byte_array);
Variant(const Vector<int32_t> &p_int32_array);
Variant(const Vector<int64_t> &p_int64_array);
Variant(const Vector<float> &p_float32_array);
Variant(const Vector<double> &p_float64_array);
Variant(const Vector<String> &p_string_array);
Variant(const Vector<Vector3> &p_vector3_array);
Variant(const Vector<Color> &p_color_array);
Variant(const Vector<Face3> &p_face_array);
Variant(const Vector<Variant> &p_array);
Variant(const Vector<StringName> &p_array);
Variant(const Vector<RID> &p_array); // helper
Variant(const Vector<Vector2> &p_array); // helper
Variant(const IP_Address &p_address);
// If this changes the table in variant_op must be updated
enum Operator {
//comparison
OP_EQUAL,
OP_NOT_EQUAL,
OP_LESS,
OP_LESS_EQUAL,
OP_GREATER,
OP_GREATER_EQUAL,
//mathematic
OP_ADD,
OP_SUBTRACT,
OP_MULTIPLY,
OP_DIVIDE,
OP_NEGATE,
OP_POSITIVE,
OP_MODULE,
OP_STRING_CONCAT,
//bitwise
OP_SHIFT_LEFT,
OP_SHIFT_RIGHT,
OP_BIT_AND,
OP_BIT_OR,
OP_BIT_XOR,
OP_BIT_NEGATE,
//logic
OP_AND,
OP_OR,
OP_XOR,
OP_NOT,
//containment
OP_IN,
OP_MAX
};
static String get_operator_name(Operator p_op);
static void evaluate(const Operator &p_op, const Variant &p_a, const Variant &p_b, Variant &r_ret, bool &r_valid);
static _FORCE_INLINE_ Variant evaluate(const Operator &p_op, const Variant &p_a, const Variant &p_b) {
bool valid = true;
Variant res;
evaluate(p_op, p_a, p_b, res, valid);
return res;
}
void zero();
Variant duplicate(bool deep = false) const;
static void blend(const Variant &a, const Variant &b, float c, Variant &r_dst);
static void interpolate(const Variant &a, const Variant &b, float c, Variant &r_dst);
void call_ptr(const StringName &p_method, const Variant **p_args, int p_argcount, Variant *r_ret, Callable::CallError &r_error);
Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error);
Variant call(const StringName &p_method, const Variant &p_arg1 = Variant(), const Variant &p_arg2 = Variant(), const Variant &p_arg3 = Variant(), const Variant &p_arg4 = Variant(), const Variant &p_arg5 = Variant());
static String get_call_error_text(Object *p_base, const StringName &p_method, const Variant **p_argptrs, int p_argcount, const Callable::CallError &ce);
static String get_callable_error_text(const Callable &p_callable, const Variant **p_argptrs, int p_argcount, const Callable::CallError &ce);
static Variant construct(const Variant::Type, const Variant **p_args, int p_argcount, Callable::CallError &r_error, bool p_strict = true);
void get_method_list(List<MethodInfo> *p_list) const;
bool has_method(const StringName &p_method) const;
static Vector<Variant::Type> get_method_argument_types(Variant::Type p_type, const StringName &p_method);
static Vector<Variant> get_method_default_arguments(Variant::Type p_type, const StringName &p_method);
static Variant::Type get_method_return_type(Variant::Type p_type, const StringName &p_method, bool *r_has_return = nullptr);
static Vector<StringName> get_method_argument_names(Variant::Type p_type, const StringName &p_method);
static bool is_method_const(Variant::Type p_type, const StringName &p_method);
void set_named(const StringName &p_index, const Variant &p_value, bool *r_valid = nullptr);
Variant get_named(const StringName &p_index, bool *r_valid = nullptr) const;
void set(const Variant &p_index, const Variant &p_value, bool *r_valid = nullptr);
Variant get(const Variant &p_index, bool *r_valid = nullptr) const;
bool in(const Variant &p_index, bool *r_valid = nullptr) const;
bool iter_init(Variant &r_iter, bool &r_valid) const;
bool iter_next(Variant &r_iter, bool &r_valid) const;
Variant iter_get(const Variant &r_iter, bool &r_valid) const;
void get_property_list(List<PropertyInfo> *p_list) const;
//argsVariant call()
bool operator==(const Variant &p_variant) const;
bool operator!=(const Variant &p_variant) const;
bool operator<(const Variant &p_variant) const;
uint32_t hash() const;
bool hash_compare(const Variant &p_variant) const;
bool booleanize() const;
String stringify(List<const void *> &stack) const;
void static_assign(const Variant &p_variant);
static void get_constructor_list(Variant::Type p_type, List<MethodInfo> *p_list);
static void get_constants_for_type(Variant::Type p_type, List<StringName> *p_constants);
static bool has_constant(Variant::Type p_type, const StringName &p_value);
static Variant get_constant_value(Variant::Type p_type, const StringName &p_value, bool *r_valid = nullptr);
typedef String (*ObjectDeConstruct)(const Variant &p_object, void *ud);
typedef void (*ObjectConstruct)(const String &p_text, void *ud, Variant &r_value);
String get_construct_string() const;
static void construct_from_string(const String &p_string, Variant &r_value, ObjectConstruct p_obj_construct = nullptr, void *p_construct_ud = nullptr);
void operator=(const Variant &p_variant); // only this is enough for all the other types
Variant(const Variant &p_variant);
_FORCE_INLINE_ Variant() {
type = NIL;
}
_FORCE_INLINE_ ~Variant() {
if (type != Variant::NIL) clear();
}
};
//typedef Dictionary Dictionary; no
//typedef Array Array;
Vector<Variant> varray();
Vector<Variant> varray(const Variant &p_arg1);
Vector<Variant> varray(const Variant &p_arg1, const Variant &p_arg2);
Vector<Variant> varray(const Variant &p_arg1, const Variant &p_arg2, const Variant &p_arg3);
Vector<Variant> varray(const Variant &p_arg1, const Variant &p_arg2, const Variant &p_arg3, const Variant &p_arg4);
Vector<Variant> varray(const Variant &p_arg1, const Variant &p_arg2, const Variant &p_arg3, const Variant &p_arg4, const Variant &p_arg5);
struct VariantHasher {
static _FORCE_INLINE_ uint32_t hash(const Variant &p_variant) { return p_variant.hash(); }
};
struct VariantComparator {
static _FORCE_INLINE_ bool compare(const Variant &p_lhs, const Variant &p_rhs) { return p_lhs.hash_compare(p_rhs); }
};
Variant::ObjData &Variant::_get_obj() {
return *reinterpret_cast<ObjData *>(&_data._mem[0]);
}
const Variant::ObjData &Variant::_get_obj() const {
return *reinterpret_cast<const ObjData *>(&_data._mem[0]);
}
String vformat(const String &p_text, const Variant &p1 = Variant(), const Variant &p2 = Variant(), const Variant &p3 = Variant(), const Variant &p4 = Variant(), const Variant &p5 = Variant());
#endif // VARIANT_H