GODOT IS OPEN SOURCE

core/io/marshalls.h

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+/*************************************************************************/
+/*  marshalls.h                                                          */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* 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.                */
+/*************************************************************************/
+#ifndef MARSHALLS_H
+#define MARSHALLS_H
+
+#include "typedefs.h"
+
+#include "variant.h"
+
+/**
+  * Miscelaneous helpers for marshalling 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
+};
+
+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_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 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_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;
+
+}
+
+
+Error decode_variant(Variant& r_variant,const uint8_t *p_buffer, int p_len,int *r_len=NULL);
+Error encode_variant(const Variant& p_variant, uint8_t *r_buffer, int &r_len);
+
+#endif