188 lines
4.6 KiB
C++
188 lines
4.6 KiB
C++
/*************************************************************************/
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/* marshalls.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef MARSHALLS_H
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#define MARSHALLS_H
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#include "typedefs.h"
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#include "variant.h"
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/**
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* Miscelaneous helpers for marshalling data types, and encoding
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* in an endian independent way
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*/
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union MarshallFloat {
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uint32_t i; ///< int
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float f; ///< float
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};
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union MarshallDouble {
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uint64_t l; ///< long long
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double d; ///< double
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};
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static inline unsigned int encode_uint16(uint16_t p_uint, uint8_t *p_arr) {
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for (int i = 0; i < 2; i++) {
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*p_arr = p_uint & 0xFF;
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p_arr++;
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p_uint >>= 8;
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}
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return sizeof(uint16_t);
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}
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static inline unsigned int encode_uint32(uint32_t p_uint, uint8_t *p_arr) {
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for (int i = 0; i < 4; i++) {
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*p_arr = p_uint & 0xFF;
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p_arr++;
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p_uint >>= 8;
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}
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return sizeof(uint32_t);
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}
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static inline unsigned int encode_float(float p_float, uint8_t *p_arr) {
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MarshallFloat mf;
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mf.f = p_float;
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encode_uint32(mf.i, p_arr);
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return sizeof(uint32_t);
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}
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static inline unsigned int encode_uint64(uint64_t p_uint, uint8_t *p_arr) {
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for (int i = 0; i < 8; i++) {
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*p_arr = p_uint & 0xFF;
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p_arr++;
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p_uint >>= 8;
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}
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return sizeof(uint64_t);
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}
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static inline unsigned int encode_double(double p_double, uint8_t *p_arr) {
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MarshallDouble md;
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md.d = p_double;
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encode_uint64(md.l, p_arr);
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return sizeof(uint64_t);
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}
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static inline int encode_cstring(const char *p_string, uint8_t *p_data) {
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int len = 0;
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while (*p_string) {
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if (p_data) {
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*p_data = (uint8_t)*p_string;
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p_data++;
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}
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p_string++;
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len++;
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};
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if (p_data) *p_data = 0;
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return len + 1;
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}
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static inline uint16_t decode_uint16(const uint8_t *p_arr) {
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uint16_t u = 0;
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for (int i = 0; i < 2; i++) {
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uint16_t b = *p_arr;
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b <<= (i * 8);
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u |= b;
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p_arr++;
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}
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return u;
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}
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static inline uint32_t decode_uint32(const uint8_t *p_arr) {
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uint32_t u = 0;
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for (int i = 0; i < 4; i++) {
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uint32_t b = *p_arr;
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b <<= (i * 8);
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u |= b;
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p_arr++;
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}
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return u;
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}
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static inline float decode_float(const uint8_t *p_arr) {
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MarshallFloat mf;
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mf.i = decode_uint32(p_arr);
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return mf.f;
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}
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static inline uint64_t decode_uint64(const uint8_t *p_arr) {
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uint64_t u = 0;
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for (int i = 0; i < 8; i++) {
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uint64_t b = (*p_arr) & 0xFF;
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b <<= (i * 8);
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u |= b;
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p_arr++;
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}
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return u;
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}
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static inline double decode_double(const uint8_t *p_arr) {
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MarshallDouble md;
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md.l = decode_uint64(p_arr);
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return md.d;
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}
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Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int *r_len = NULL);
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Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len);
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#endif
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