initial commit, 4.5 stable

core/io/marshalls.h

@@ -0,0 +1,227 @@
+/**************************************************************************/
+/*  marshalls.h                                                           */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "core/math/math_defs.h"
+#include "core/object/ref_counted.h"
+#include "core/typedefs.h"
+#include "core/variant/variant.h"
+
+// uintr_t is only for pairing with real_t, and we only need it in here.
+#ifdef REAL_T_IS_DOUBLE
+typedef uint64_t uintr_t;
+#else
+typedef uint32_t uintr_t;
+#endif
+
+/**
+ * Miscellaneous helpers for marshaling data types, and encoding
+ * in an endian independent way
+ */
+
+union MarshallFloat {
+	uint32_t i; ///< int
+	float f; ///< float
+};
+
+union MarshallDouble {
+	uint64_t l; ///< long long
+	double d; ///< double
+};
+
+// Behaves like one of the above, depending on compilation setting.
+union MarshallReal {
+	uintr_t i;
+	real_t r;
+};
+
+static inline unsigned int encode_uint16(uint16_t p_uint, uint8_t *p_arr) {
+	for (int i = 0; i < 2; i++) {
+		*p_arr = p_uint & 0xFF;
+		p_arr++;
+		p_uint >>= 8;
+	}
+
+	return sizeof(uint16_t);
+}
+
+static inline unsigned int encode_uint32(uint32_t p_uint, uint8_t *p_arr) {
+	for (int i = 0; i < 4; i++) {
+		*p_arr = p_uint & 0xFF;
+		p_arr++;
+		p_uint >>= 8;
+	}
+
+	return sizeof(uint32_t);
+}
+
+static inline unsigned int encode_half(float p_float, uint8_t *p_arr) {
+	encode_uint16(Math::make_half_float(p_float), p_arr);
+
+	return sizeof(uint16_t);
+}
+
+static inline unsigned int encode_float(float p_float, uint8_t *p_arr) {
+	MarshallFloat mf;
+	mf.f = p_float;
+	encode_uint32(mf.i, p_arr);
+
+	return sizeof(uint32_t);
+}
+
+static inline unsigned int encode_uint64(uint64_t p_uint, uint8_t *p_arr) {
+	for (int i = 0; i < 8; i++) {
+		*p_arr = p_uint & 0xFF;
+		p_arr++;
+		p_uint >>= 8;
+	}
+
+	return sizeof(uint64_t);
+}
+
+static inline unsigned int encode_double(double p_double, uint8_t *p_arr) {
+	MarshallDouble md;
+	md.d = p_double;
+	encode_uint64(md.l, p_arr);
+
+	return sizeof(uint64_t);
+}
+
+static inline unsigned int encode_uintr(uintr_t p_uint, uint8_t *p_arr) {
+	for (size_t i = 0; i < sizeof(uintr_t); i++) {
+		*p_arr = p_uint & 0xFF;
+		p_arr++;
+		p_uint >>= 8;
+	}
+
+	return sizeof(uintr_t);
+}
+
+static inline unsigned int encode_real(real_t p_real, uint8_t *p_arr) {
+	MarshallReal mr;
+	mr.r = p_real;
+	encode_uintr(mr.i, p_arr);
+
+	return sizeof(uintr_t);
+}
+
+static inline int encode_cstring(const char *p_string, uint8_t *p_data) {
+	int len = 0;
+
+	while (*p_string) {
+		if (p_data) {
+			*p_data = (uint8_t)*p_string;
+			p_data++;
+		}
+		p_string++;
+		len++;
+	}
+
+	if (p_data) {
+		*p_data = 0;
+	}
+	return len + 1;
+}
+
+static inline uint16_t decode_uint16(const uint8_t *p_arr) {
+	uint16_t u = 0;
+
+	for (int i = 0; i < 2; i++) {
+		uint16_t b = *p_arr;
+		b <<= (i * 8);
+		u |= b;
+		p_arr++;
+	}
+
+	return u;
+}
+
+static inline uint32_t decode_uint32(const uint8_t *p_arr) {
+	uint32_t u = 0;
+
+	for (int i = 0; i < 4; i++) {
+		uint32_t b = *p_arr;
+		b <<= (i * 8);
+		u |= b;
+		p_arr++;
+	}
+
+	return u;
+}
+
+static inline float decode_half(const uint8_t *p_arr) {
+	return Math::half_to_float(decode_uint16(p_arr));
+}
+
+static inline float decode_float(const uint8_t *p_arr) {
+	MarshallFloat mf;
+	mf.i = decode_uint32(p_arr);
+	return mf.f;
+}
+
+static inline uint64_t decode_uint64(const uint8_t *p_arr) {
+	uint64_t u = 0;
+
+	for (int i = 0; i < 8; i++) {
+		uint64_t b = (*p_arr) & 0xFF;
+		b <<= (i * 8);
+		u |= b;
+		p_arr++;
+	}
+
+	return u;
+}
+
+static inline double decode_double(const uint8_t *p_arr) {
+	MarshallDouble md;
+	md.l = decode_uint64(p_arr);
+	return md.d;
+}
+
+class EncodedObjectAsID : public RefCounted {
+	GDCLASS(EncodedObjectAsID, RefCounted);
+
+	ObjectID id;
+
+protected:
+	static void _bind_methods();
+
+public:
+	void set_object_id(ObjectID p_id);
+	ObjectID get_object_id() const;
+
+	EncodedObjectAsID() {}
+};
+
+Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int *r_len = nullptr, bool p_allow_objects = false, int p_depth = 0);
+Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len, bool p_full_objects = false, int p_depth = 0);
+
+Vector<float> vector3_to_float32_array(const Vector3 *vecs, size_t count);