400 lines
12 KiB
C++
400 lines
12 KiB
C++
/*************************************************************************/
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/* packed_data_container.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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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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#include "packed_data_container.h"
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#include "core/core_string_names.h"
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#include "core/io/marshalls.h"
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Variant PackedDataContainer::getvar(const Variant &p_key, bool *r_valid) const {
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bool err = false;
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Variant ret = _key_at_ofs(0, p_key, err);
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if (r_valid) {
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*r_valid = !err;
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}
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if (err) {
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return Object::getvar(p_key, r_valid);
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}
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return ret;
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}
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int PackedDataContainer::size() const {
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return _size(0);
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}
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Variant PackedDataContainer::_iter_init_ofs(const Array &p_iter, uint32_t p_offset) {
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Array ref = p_iter;
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uint32_t size = _size(p_offset);
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if (size == 0 || ref.size() != 1) {
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return false;
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} else {
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ref[0] = 0;
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return true;
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}
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}
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Variant PackedDataContainer::_iter_next_ofs(const Array &p_iter, uint32_t p_offset) {
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Array ref = p_iter;
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int size = _size(p_offset);
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if (ref.size() != 1) {
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return false;
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}
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int pos = ref[0];
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if (pos < 0 || pos >= size) {
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return false;
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}
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pos += 1;
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ref[0] = pos;
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return pos != size;
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}
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Variant PackedDataContainer::_iter_get_ofs(const Variant &p_iter, uint32_t p_offset) {
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int size = _size(p_offset);
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int pos = p_iter;
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if (pos < 0 || pos >= size) {
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return Variant();
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}
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const uint8_t *rd = data.ptr();
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const uint8_t *r = &rd[p_offset];
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uint32_t type = decode_uint32(r);
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bool err = false;
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if (type == TYPE_ARRAY) {
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uint32_t vpos = decode_uint32(rd + p_offset + 8 + pos * 4);
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return _get_at_ofs(vpos, rd, err);
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} else if (type == TYPE_DICT) {
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uint32_t vpos = decode_uint32(rd + p_offset + 8 + pos * 12 + 4);
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return _get_at_ofs(vpos, rd, err);
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} else {
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ERR_FAIL_V(Variant());
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}
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}
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Variant PackedDataContainer::_get_at_ofs(uint32_t p_ofs, const uint8_t *p_buf, bool &err) const {
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uint32_t type = decode_uint32(p_buf + p_ofs);
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if (type == TYPE_ARRAY || type == TYPE_DICT) {
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Ref<PackedDataContainerRef> pdcr = memnew(PackedDataContainerRef);
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Ref<PackedDataContainer> pdc = Ref<PackedDataContainer>((PackedDataContainer *)this);
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pdcr->from = pdc;
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pdcr->offset = p_ofs;
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return pdcr;
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} else {
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Variant v;
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Error rerr = decode_variant(v, p_buf + p_ofs, datalen - p_ofs, nullptr, false);
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if (rerr != OK) {
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err = true;
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ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to decode Variant.");
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}
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return v;
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}
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}
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uint32_t PackedDataContainer::_type_at_ofs(uint32_t p_ofs) const {
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const uint8_t *rd = data.ptr();
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ERR_FAIL_COND_V(!rd, 0);
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const uint8_t *r = &rd[p_ofs];
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uint32_t type = decode_uint32(r);
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return type;
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}
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int PackedDataContainer::_size(uint32_t p_ofs) const {
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const uint8_t *rd = data.ptr();
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ERR_FAIL_COND_V(!rd, 0);
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const uint8_t *r = &rd[p_ofs];
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uint32_t type = decode_uint32(r);
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if (type == TYPE_ARRAY) {
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uint32_t len = decode_uint32(r + 4);
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return len;
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} else if (type == TYPE_DICT) {
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uint32_t len = decode_uint32(r + 4);
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return len;
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}
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return -1;
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}
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Variant PackedDataContainer::_key_at_ofs(uint32_t p_ofs, const Variant &p_key, bool &err) const {
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const uint8_t *rd = data.ptr();
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if (!rd) {
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err = true;
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ERR_FAIL_COND_V(!rd, Variant());
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}
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const uint8_t *r = &rd[p_ofs];
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uint32_t type = decode_uint32(r);
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if (type == TYPE_ARRAY) {
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if (p_key.is_num()) {
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int idx = p_key;
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int len = decode_uint32(r + 4);
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if (idx < 0 || idx >= len) {
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err = true;
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return Variant();
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}
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uint32_t ofs = decode_uint32(r + 8 + 4 * idx);
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return _get_at_ofs(ofs, rd, err);
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} else {
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err = true;
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return Variant();
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}
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} else if (type == TYPE_DICT) {
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uint32_t hash = p_key.hash();
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uint32_t len = decode_uint32(r + 4);
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bool found = false;
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for (uint32_t i = 0; i < len; i++) {
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uint32_t khash = decode_uint32(r + 8 + i * 12 + 0);
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if (khash == hash) {
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Variant key = _get_at_ofs(decode_uint32(r + 8 + i * 12 + 4), rd, err);
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if (err) {
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return Variant();
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}
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if (key == p_key) {
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//key matches, return value
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return _get_at_ofs(decode_uint32(r + 8 + i * 12 + 8), rd, err);
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}
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found = true;
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} else {
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if (found) {
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break;
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}
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}
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}
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err = true;
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return Variant();
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} else {
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err = true;
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return Variant();
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}
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}
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uint32_t PackedDataContainer::_pack(const Variant &p_data, Vector<uint8_t> &tmpdata, Map<String, uint32_t> &string_cache) {
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switch (p_data.get_type()) {
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case Variant::STRING: {
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String s = p_data;
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if (string_cache.has(s)) {
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return string_cache[s];
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}
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string_cache[s] = tmpdata.size();
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[[fallthrough]];
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}
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case Variant::NIL:
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case Variant::BOOL:
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case Variant::INT:
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case Variant::FLOAT:
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case Variant::VECTOR2:
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case Variant::RECT2:
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case Variant::VECTOR3:
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case Variant::TRANSFORM2D:
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case Variant::PLANE:
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case Variant::QUAT:
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case Variant::AABB:
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case Variant::BASIS:
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case Variant::TRANSFORM3D:
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case Variant::PACKED_BYTE_ARRAY:
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case Variant::PACKED_INT32_ARRAY:
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case Variant::PACKED_INT64_ARRAY:
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case Variant::PACKED_FLOAT32_ARRAY:
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case Variant::PACKED_FLOAT64_ARRAY:
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case Variant::PACKED_STRING_ARRAY:
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case Variant::PACKED_VECTOR2_ARRAY:
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case Variant::PACKED_VECTOR3_ARRAY:
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case Variant::PACKED_COLOR_ARRAY:
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case Variant::STRING_NAME:
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case Variant::NODE_PATH: {
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uint32_t pos = tmpdata.size();
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int len;
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encode_variant(p_data, nullptr, len, false);
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tmpdata.resize(tmpdata.size() + len);
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encode_variant(p_data, &tmpdata.write[pos], len, false);
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return pos;
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} break;
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// misc types
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case Variant::RID:
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case Variant::OBJECT: {
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return _pack(Variant(), tmpdata, string_cache);
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} break;
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case Variant::DICTIONARY: {
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Dictionary d = p_data;
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//size is known, use sort
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uint32_t pos = tmpdata.size();
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int len = d.size();
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tmpdata.resize(tmpdata.size() + len * 12 + 8);
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encode_uint32(TYPE_DICT, &tmpdata.write[pos + 0]);
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encode_uint32(len, &tmpdata.write[pos + 4]);
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List<Variant> keys;
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d.get_key_list(&keys);
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List<DictKey> sortk;
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for (List<Variant>::Element *E = keys.front(); E; E = E->next()) {
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DictKey dk;
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dk.hash = E->get().hash();
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dk.key = E->get();
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sortk.push_back(dk);
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}
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sortk.sort();
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int idx = 0;
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for (List<DictKey>::Element *E = sortk.front(); E; E = E->next()) {
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encode_uint32(E->get().hash, &tmpdata.write[pos + 8 + idx * 12 + 0]);
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uint32_t ofs = _pack(E->get().key, tmpdata, string_cache);
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encode_uint32(ofs, &tmpdata.write[pos + 8 + idx * 12 + 4]);
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ofs = _pack(d[E->get().key], tmpdata, string_cache);
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encode_uint32(ofs, &tmpdata.write[pos + 8 + idx * 12 + 8]);
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idx++;
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}
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return pos;
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} break;
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case Variant::ARRAY: {
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Array a = p_data;
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//size is known, use sort
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uint32_t pos = tmpdata.size();
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int len = a.size();
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tmpdata.resize(tmpdata.size() + len * 4 + 8);
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encode_uint32(TYPE_ARRAY, &tmpdata.write[pos + 0]);
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encode_uint32(len, &tmpdata.write[pos + 4]);
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for (int i = 0; i < len; i++) {
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uint32_t ofs = _pack(a[i], tmpdata, string_cache);
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encode_uint32(ofs, &tmpdata.write[pos + 8 + i * 4]);
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}
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return pos;
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} break;
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default: {
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}
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}
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return OK;
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}
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Error PackedDataContainer::pack(const Variant &p_data) {
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Vector<uint8_t> tmpdata;
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Map<String, uint32_t> string_cache;
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_pack(p_data, tmpdata, string_cache);
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datalen = tmpdata.size();
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data.resize(tmpdata.size());
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uint8_t *w = data.ptrw();
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memcpy(w, tmpdata.ptr(), tmpdata.size());
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return OK;
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}
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void PackedDataContainer::_set_data(const Vector<uint8_t> &p_data) {
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data = p_data;
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datalen = data.size();
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}
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Vector<uint8_t> PackedDataContainer::_get_data() const {
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return data;
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}
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Variant PackedDataContainer::_iter_init(const Array &p_iter) {
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return _iter_init_ofs(p_iter, 0);
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}
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Variant PackedDataContainer::_iter_next(const Array &p_iter) {
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return _iter_next_ofs(p_iter, 0);
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}
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Variant PackedDataContainer::_iter_get(const Variant &p_iter) {
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return _iter_get_ofs(p_iter, 0);
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}
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void PackedDataContainer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("_set_data"), &PackedDataContainer::_set_data);
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ClassDB::bind_method(D_METHOD("_get_data"), &PackedDataContainer::_get_data);
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ClassDB::bind_method(D_METHOD("_iter_init"), &PackedDataContainer::_iter_init);
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ClassDB::bind_method(D_METHOD("_iter_get"), &PackedDataContainer::_iter_get);
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ClassDB::bind_method(D_METHOD("_iter_next"), &PackedDataContainer::_iter_next);
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ClassDB::bind_method(D_METHOD("pack", "value"), &PackedDataContainer::pack);
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ClassDB::bind_method(D_METHOD("size"), &PackedDataContainer::size);
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ADD_PROPERTY(PropertyInfo(Variant::PACKED_BYTE_ARRAY, "__data__"), "_set_data", "_get_data");
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}
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//////////////////
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Variant PackedDataContainerRef::_iter_init(const Array &p_iter) {
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return from->_iter_init_ofs(p_iter, offset);
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}
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Variant PackedDataContainerRef::_iter_next(const Array &p_iter) {
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return from->_iter_next_ofs(p_iter, offset);
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}
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Variant PackedDataContainerRef::_iter_get(const Variant &p_iter) {
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return from->_iter_get_ofs(p_iter, offset);
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}
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bool PackedDataContainerRef::_is_dictionary() const {
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return from->_type_at_ofs(offset) == PackedDataContainer::TYPE_DICT;
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}
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void PackedDataContainerRef::_bind_methods() {
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ClassDB::bind_method(D_METHOD("size"), &PackedDataContainerRef::size);
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ClassDB::bind_method(D_METHOD("_iter_init"), &PackedDataContainerRef::_iter_init);
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ClassDB::bind_method(D_METHOD("_iter_get"), &PackedDataContainerRef::_iter_get);
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ClassDB::bind_method(D_METHOD("_iter_next"), &PackedDataContainerRef::_iter_next);
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ClassDB::bind_method(D_METHOD("_is_dictionary"), &PackedDataContainerRef::_is_dictionary);
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}
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Variant PackedDataContainerRef::getvar(const Variant &p_key, bool *r_valid) const {
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bool err = false;
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Variant ret = from->_key_at_ofs(offset, p_key, err);
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if (r_valid) {
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*r_valid = !err;
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}
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return ret;
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}
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int PackedDataContainerRef::size() const {
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return from->_size(offset);
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}
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