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/*************************************************************************/
/* marshalls.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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 MARSHALLS_H
#define MARSHALLS_H
#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 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
};
// 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_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_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);
Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len, bool p_full_objects = false, int p_depth = 0);
#endif // MARSHALLS_H
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