godot/core/io/marshalls.h
Rémi Verschelde c7bc44d5ad Welcome in 2017, dear changelog reader!
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
2017-01-01 22:03:33 +01:00

191 lines
4.5 KiB
C++

/*************************************************************************/
/* marshalls.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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