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godot/core/io/packed_data_container.cpp
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

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/**************************************************************************/
/* packed_data_container.cpp */
/**************************************************************************/
/* 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. */
/**************************************************************************/
#include "packed_data_container.h"
#include "core/core_string_names.h"
#include "core/io/marshalls.h"
Variant PackedDataContainer::getvar(const Variant &p_key, bool *r_valid) const {
bool err = false;
Variant ret = _key_at_ofs(0, p_key, err);
if (r_valid) {
*r_valid = !err;
}
if (err) {
return Object::getvar(p_key, r_valid);
}
return ret;
}
int PackedDataContainer::size() const {
return _size(0);
}
Variant PackedDataContainer::_iter_init_ofs(const Array &p_iter, uint32_t p_offset) {
Array ref = p_iter;
uint32_t size = _size(p_offset);
if (size == 0 || ref.size() != 1) {
return false;
} else {
ref[0] = 0;
return true;
}
}
Variant PackedDataContainer::_iter_next_ofs(const Array &p_iter, uint32_t p_offset) {
Array ref = p_iter;
int size = _size(p_offset);
if (ref.size() != 1) {
return false;
}
int pos = ref[0];
if (pos < 0 || pos >= size) {
return false;
}
pos += 1;
ref[0] = pos;
return pos != size;
}
Variant PackedDataContainer::_iter_get_ofs(const Variant &p_iter, uint32_t p_offset) {
int size = _size(p_offset);
int pos = p_iter;
if (pos < 0 || pos >= size) {
return Variant();
}
const uint8_t *rd = data.ptr();
const uint8_t *r = &rd[p_offset];
uint32_t type = decode_uint32(r);
bool err = false;
if (type == TYPE_ARRAY) {
uint32_t vpos = decode_uint32(rd + p_offset + 8 + pos * 4);
return _get_at_ofs(vpos, rd, err);
} else if (type == TYPE_DICT) {
uint32_t vpos = decode_uint32(rd + p_offset + 8 + pos * 12 + 4);
return _get_at_ofs(vpos, rd, err);
} else {
ERR_FAIL_V(Variant());
}
}
Variant PackedDataContainer::_get_at_ofs(uint32_t p_ofs, const uint8_t *p_buf, bool &err) const {
ERR_FAIL_COND_V(p_ofs + 4 > (uint32_t)data.size(), Variant());
uint32_t type = decode_uint32(p_buf + p_ofs);
if (type == TYPE_ARRAY || type == TYPE_DICT) {
Ref<PackedDataContainerRef> pdcr = memnew(PackedDataContainerRef);
Ref<PackedDataContainer> pdc = Ref<PackedDataContainer>(const_cast<PackedDataContainer *>(this));
pdcr->from = pdc;
pdcr->offset = p_ofs;
return pdcr;
} else {
Variant v;
Error rerr = decode_variant(v, p_buf + p_ofs, datalen - p_ofs, nullptr, false);
if (rerr != OK) {
err = true;
ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to decode Variant.");
}
return v;
}
}
uint32_t PackedDataContainer::_type_at_ofs(uint32_t p_ofs) const {
ERR_FAIL_COND_V(p_ofs + 4 > (uint32_t)data.size(), 0);
const uint8_t *rd = data.ptr();
ERR_FAIL_COND_V(!rd, 0);
const uint8_t *r = &rd[p_ofs];
uint32_t type = decode_uint32(r);
return type;
}
int PackedDataContainer::_size(uint32_t p_ofs) const {
ERR_FAIL_COND_V(p_ofs + 4 > (uint32_t)data.size(), 0);
const uint8_t *rd = data.ptr();
ERR_FAIL_COND_V(!rd, 0);
const uint8_t *r = &rd[p_ofs];
uint32_t type = decode_uint32(r);
if (type == TYPE_ARRAY) {
uint32_t len = decode_uint32(r + 4);
return len;
} else if (type == TYPE_DICT) {
uint32_t len = decode_uint32(r + 4);
return len;
}
return -1;
}
Variant PackedDataContainer::_key_at_ofs(uint32_t p_ofs, const Variant &p_key, bool &err) const {
ERR_FAIL_COND_V(p_ofs + 4 > (uint32_t)data.size(), Variant());
const uint8_t *rd = data.ptr();
if (!rd) {
err = true;
ERR_FAIL_COND_V(!rd, Variant());
}
const uint8_t *r = &rd[p_ofs];
uint32_t type = decode_uint32(r);
if (type == TYPE_ARRAY) {
if (p_key.is_num()) {
int idx = p_key;
int len = decode_uint32(r + 4);
if (idx < 0 || idx >= len) {
err = true;
return Variant();
}
uint32_t ofs = decode_uint32(r + 8 + 4 * idx);
return _get_at_ofs(ofs, rd, err);
} else {
err = true;
return Variant();
}
} else if (type == TYPE_DICT) {
uint32_t hash = p_key.hash();
uint32_t len = decode_uint32(r + 4);
bool found = false;
for (uint32_t i = 0; i < len; i++) {
uint32_t khash = decode_uint32(r + 8 + i * 12 + 0);
if (khash == hash) {
Variant key = _get_at_ofs(decode_uint32(r + 8 + i * 12 + 4), rd, err);
if (err) {
return Variant();
}
if (key == p_key) {
//key matches, return value
return _get_at_ofs(decode_uint32(r + 8 + i * 12 + 8), rd, err);
}
found = true;
} else {
if (found) {
break;
}
}
}
err = true;
return Variant();
} else {
err = true;
return Variant();
}
}
uint32_t PackedDataContainer::_pack(const Variant &p_data, Vector<uint8_t> &tmpdata, HashMap<String, uint32_t> &string_cache) {
switch (p_data.get_type()) {
case Variant::STRING: {
String s = p_data;
if (string_cache.has(s)) {
return string_cache[s];
}
string_cache[s] = tmpdata.size();
[[fallthrough]];
}
case Variant::NIL:
case Variant::BOOL:
case Variant::INT:
case Variant::FLOAT:
case Variant::VECTOR2:
case Variant::RECT2:
case Variant::VECTOR3:
case Variant::TRANSFORM2D:
case Variant::PLANE:
case Variant::QUATERNION:
case Variant::AABB:
case Variant::BASIS:
case Variant::TRANSFORM3D:
case Variant::PACKED_BYTE_ARRAY:
case Variant::PACKED_INT32_ARRAY:
case Variant::PACKED_INT64_ARRAY:
case Variant::PACKED_FLOAT32_ARRAY:
case Variant::PACKED_FLOAT64_ARRAY:
case Variant::PACKED_STRING_ARRAY:
case Variant::PACKED_VECTOR2_ARRAY:
case Variant::PACKED_VECTOR3_ARRAY:
case Variant::PACKED_COLOR_ARRAY:
case Variant::STRING_NAME:
case Variant::NODE_PATH: {
uint32_t pos = tmpdata.size();
int len;
encode_variant(p_data, nullptr, len, false);
tmpdata.resize(tmpdata.size() + len);
encode_variant(p_data, &tmpdata.write[pos], len, false);
return pos;
} break;
// misc types
case Variant::RID:
case Variant::OBJECT: {
return _pack(Variant(), tmpdata, string_cache);
} break;
case Variant::DICTIONARY: {
Dictionary d = p_data;
//size is known, use sort
uint32_t pos = tmpdata.size();
int len = d.size();
tmpdata.resize(tmpdata.size() + len * 12 + 8);
encode_uint32(TYPE_DICT, &tmpdata.write[pos + 0]);
encode_uint32(len, &tmpdata.write[pos + 4]);
List<Variant> keys;
d.get_key_list(&keys);
List<DictKey> sortk;
for (const Variant &key : keys) {
DictKey dk;
dk.hash = key.hash();
dk.key = key;
sortk.push_back(dk);
}
sortk.sort();
int idx = 0;
for (const DictKey &E : sortk) {
encode_uint32(E.hash, &tmpdata.write[pos + 8 + idx * 12 + 0]);
uint32_t ofs = _pack(E.key, tmpdata, string_cache);
encode_uint32(ofs, &tmpdata.write[pos + 8 + idx * 12 + 4]);
ofs = _pack(d[E.key], tmpdata, string_cache);
encode_uint32(ofs, &tmpdata.write[pos + 8 + idx * 12 + 8]);
idx++;
}
return pos;
} break;
case Variant::ARRAY: {
Array a = p_data;
//size is known, use sort
uint32_t pos = tmpdata.size();
int len = a.size();
tmpdata.resize(tmpdata.size() + len * 4 + 8);
encode_uint32(TYPE_ARRAY, &tmpdata.write[pos + 0]);
encode_uint32(len, &tmpdata.write[pos + 4]);
for (int i = 0; i < len; i++) {
uint32_t ofs = _pack(a[i], tmpdata, string_cache);
encode_uint32(ofs, &tmpdata.write[pos + 8 + i * 4]);
}
return pos;
} break;
default: {
}
}
return OK;
}
Error PackedDataContainer::pack(const Variant &p_data) {
Vector<uint8_t> tmpdata;
HashMap<String, uint32_t> string_cache;
_pack(p_data, tmpdata, string_cache);
datalen = tmpdata.size();
data.resize(tmpdata.size());
uint8_t *w = data.ptrw();
memcpy(w, tmpdata.ptr(), tmpdata.size());
return OK;
}
void PackedDataContainer::_set_data(const Vector<uint8_t> &p_data) {
data = p_data;
datalen = data.size();
}
Vector<uint8_t> PackedDataContainer::_get_data() const {
return data;
}
Variant PackedDataContainer::_iter_init(const Array &p_iter) {
return _iter_init_ofs(p_iter, 0);
}
Variant PackedDataContainer::_iter_next(const Array &p_iter) {
return _iter_next_ofs(p_iter, 0);
}
Variant PackedDataContainer::_iter_get(const Variant &p_iter) {
return _iter_get_ofs(p_iter, 0);
}
void PackedDataContainer::_bind_methods() {
ClassDB::bind_method(D_METHOD("_set_data", "data"), &PackedDataContainer::_set_data);
ClassDB::bind_method(D_METHOD("_get_data"), &PackedDataContainer::_get_data);
ClassDB::bind_method(D_METHOD("_iter_init"), &PackedDataContainer::_iter_init);
ClassDB::bind_method(D_METHOD("_iter_get"), &PackedDataContainer::_iter_get);
ClassDB::bind_method(D_METHOD("_iter_next"), &PackedDataContainer::_iter_next);
ClassDB::bind_method(D_METHOD("pack", "value"), &PackedDataContainer::pack);
ClassDB::bind_method(D_METHOD("size"), &PackedDataContainer::size);
ADD_PROPERTY(PropertyInfo(Variant::PACKED_BYTE_ARRAY, "__data__"), "_set_data", "_get_data");
}
//////////////////
Variant PackedDataContainerRef::_iter_init(const Array &p_iter) {
return from->_iter_init_ofs(p_iter, offset);
}
Variant PackedDataContainerRef::_iter_next(const Array &p_iter) {
return from->_iter_next_ofs(p_iter, offset);
}
Variant PackedDataContainerRef::_iter_get(const Variant &p_iter) {
return from->_iter_get_ofs(p_iter, offset);
}
bool PackedDataContainerRef::_is_dictionary() const {
return from->_type_at_ofs(offset) == PackedDataContainer::TYPE_DICT;
}
void PackedDataContainerRef::_bind_methods() {
ClassDB::bind_method(D_METHOD("size"), &PackedDataContainerRef::size);
ClassDB::bind_method(D_METHOD("_iter_init"), &PackedDataContainerRef::_iter_init);
ClassDB::bind_method(D_METHOD("_iter_get"), &PackedDataContainerRef::_iter_get);
ClassDB::bind_method(D_METHOD("_iter_next"), &PackedDataContainerRef::_iter_next);
ClassDB::bind_method(D_METHOD("_is_dictionary"), &PackedDataContainerRef::_is_dictionary);
}
Variant PackedDataContainerRef::getvar(const Variant &p_key, bool *r_valid) const {
bool err = false;
Variant ret = from->_key_at_ofs(offset, p_key, err);
if (r_valid) {
*r_valid = !err;
}
return ret;
}
int PackedDataContainerRef::size() const {
return from->_size(offset);
}
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