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godot/core/packed_data_container.cpp

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/*************************************************************************/
/* packed_data_container.cpp */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#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;
}
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();
}
PoolVector<uint8_t>::Read rd = data.read();
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.ptr() + p_offset + 8 + pos * 4);
return _get_at_ofs(vpos, rd.ptr(), err);
} else if (type == TYPE_DICT) {
uint32_t vpos = decode_uint32(rd.ptr() + p_offset + 8 + pos * 12 + 4);
return _get_at_ofs(vpos, rd.ptr(), 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>((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);
PoolVector<uint8_t>::Read rd = data.read();
ERR_FAIL_COND_V(!rd.ptr(), 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);
PoolVector<uint8_t>::Read rd = data.read();
ERR_FAIL_COND_V(!rd.ptr(), 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());
PoolVector<uint8_t>::Read rd = data.read();
if (!rd.ptr()) {
err = true;
ERR_FAIL_COND_V(!rd.ptr(), 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.ptr(), 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.ptr(), 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.ptr(), 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, Map<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::REAL:
case Variant::VECTOR2:
case Variant::RECT2:
case Variant::VECTOR3:
case Variant::TRANSFORM2D:
case Variant::PLANE:
case Variant::QUAT:
case Variant::AABB:
case Variant::BASIS:
case Variant::TRANSFORM:
case Variant::POOL_BYTE_ARRAY:
case Variant::POOL_INT_ARRAY:
case Variant::POOL_REAL_ARRAY:
case Variant::POOL_STRING_ARRAY:
case Variant::POOL_VECTOR2_ARRAY:
case Variant::POOL_VECTOR3_ARRAY:
case Variant::POOL_COLOR_ARRAY:
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 (List<Variant>::Element *E = keys.front(); E; E = E->next()) {
DictKey dk;
dk.hash = E->get().hash();
dk.key = E->get();
sortk.push_back(dk);
}
sortk.sort();
int idx = 0;
for (List<DictKey>::Element *E = sortk.front(); E; E = E->next()) {
encode_uint32(E->get().hash, &tmpdata.write[pos + 8 + idx * 12 + 0]);
uint32_t ofs = _pack(E->get().key, tmpdata, string_cache);
encode_uint32(ofs, &tmpdata.write[pos + 8 + idx * 12 + 4]);
ofs = _pack(d[E->get().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;
Map<String, uint32_t> string_cache;
_pack(p_data, tmpdata, string_cache);
datalen = tmpdata.size();
data.resize(tmpdata.size());
PoolVector<uint8_t>::Write w = data.write();
memcpy(w.ptr(), tmpdata.ptr(), tmpdata.size());
return OK;
}
void PackedDataContainer::_set_data(const PoolVector<uint8_t> &p_data) {
data = p_data;
datalen = data.size();
}
PoolVector<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"), &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::POOL_BYTE_ARRAY, "__data__"), "_set_data", "_get_data");
}
PackedDataContainer::PackedDataContainer() {
datalen = 0;
}
//////////////////
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);
};
PackedDataContainerRef::PackedDataContainerRef() {
}
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