99 lines
6.2 KiB
C++
99 lines
6.2 KiB
C++
// Copyright 2022, FOSS-VG Developers and Contributers
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU Affero General Public License as published
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// by the Free Software Foundation, version 3.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// version 3 along with this program.
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// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
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// information taken from https://wiki.vg/NBT
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// This is an attempt at creating a uniform model for all NBT tags to allow for a uniform interface based on subclassing a single NBT tag super class.
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// NBT tags have a type, optionally a name which consists of the name size and the name string, optionally content type, and optionally a payload which can consist of optionally content type, optionally a content size,
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// and the stored content. The format in which they are stored is as follows: <type><name size><name><payload>. All numbers are stored in big endian representation.
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// All tag types:
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// generic representation: Tag(uint8:tag_type, String:name, uint16:name_size, byte[]:content, int32:size)
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// None (compound end): Tag( 0, "", 0, None, 0) => used to determine the end of a compound tag, only the type gets stored
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// int8: Tag( 1, String:name, uint16:name_size, int8:content, 1) => a single signed byte, size not stored
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// int16: Tag( 2, String:name, uint16:name_size, int16:content, 2) => 16 bit signed integer, size not stored
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// int32: Tag( 3, String:name, uint16:name_size, int32:content, 4) => 32 bit signed integer, size not stored
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// int64: Tag( 4, String:name, uint16:name_size, int64:content, 8) => 64 bit signed integer, size not stored
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// float: Tag( 5, String:name, uint16:name_size, float:content, 4) => 32 bit IEEE754 floating point number, size not stored
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// double: Tag( 6, String:name, uint16:name_size, double:content, 8) => 64 bit IEEE754 floating point number, size not stored
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// int8[]: Tag( 7, String:name, uint16:name_size, int8[]:content, int32:size) => content stored prefixed with size
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// String: Tag( 8, String:name, uint16:name_size, String:content, uint16:size) => Java style modified UTF-8 string, content stored prefixed with size
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// Tag[] (list): Tag<Tag:type>( 9, String:name, uint16:name_size, Tag[]:content, int32:size) => list of tags of the same type with tag type and name information omitted prefixed by (in order) content type and size
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// Tag[] (compound): Tag(10, String:name, uint16:name_size, Tag[]:content, int32:size) => list of tags, last tag is always an end tag, size not stored
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// int32[]: Tag(11, String:name, uint16:name_size, int32[]:content,int32:size) => list of 32 bit signed integers prefixed with its size, endianness not verified at this point
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// int64[]: Tag(12, String:name, uint16:name_size, int64[]:content,int32:size) => list of 64 bit signed integers prefixed with its size, endianness not verified at this point
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#pragma once
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#include <cstdint>
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#include <vector>
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#include <tinyutf8/tinyutf8.h>
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#include "error.hpp"
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namespace NBT {
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namespace helper {
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ErrorOr<int8_t> readInt8(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<int16_t> readInt16(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<int32_t> readInt32(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<int64_t> readInt64(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<float> readFloat(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<double> readDouble(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<std::vector<int8_t>> readInt8Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<tiny_utf8::string> readString(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<std::vector<int32_t>> readInt32Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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ErrorOr<std::vector<int64_t>> readInt64Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
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void writeInt8(std::vector<uint8_t>* destination, int8_t data);
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void writeInt16(std::vector<uint8_t>* destination, int16_t data);
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void writeInt32(std::vector<uint8_t>* destination, int32_t data);
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void writeInt64(std::vector<uint8_t>* destination, int64_t data);
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void writeFloat(std::vector<uint8_t>* destination, float data);
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void writeDouble(std::vector<uint8_t>* destination, double data);
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void writeInt8Array(std::vector<uint8_t>* destination, std::vector<int8_t> data);
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void writeInt8Array(std::vector<uint8_t>* destination, int8_t data[], uint32_t dataSize);
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void writeString(std::vector<uint8_t>* destination, tiny_utf8::string data);
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void writeInt32Array(std::vector<uint8_t>* destination, std::vector<int32_t> data);
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void writeInt32Array(std::vector<uint8_t>* destination, int32_t data[], uint32_t dataSize);
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void writeInt64Array(std::vector<uint8_t>* destination, std::vector<int64_t> data);
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void writeInt64Array(std::vector<uint8_t>* destination, int64_t data[], uint32_t dataSize);
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}
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//Generic parent class to make declaration easier
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template <typename T>
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class Tag{
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public:
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uint8_t tagType;
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tiny_utf8::string name;
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uint16_t nameSize;
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T content;
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int32_t size;
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Tag(){}
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Tag(uint8_t tagType, tiny_utf8::string name, uint16_t nameSize, T content, uint32_t size);
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};
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class End: public Tag<uint8_t>{
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public:
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End();
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};
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class Byte: public Tag<int8_t>{
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public:
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Byte(tiny_utf8::string name, uint16_t nameSize, int8_t content);
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Byte(uint8_t data[]);
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bool validate(uint8_t data[]);
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};
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bool validateRawNBTData(uint8_t data[], int length);
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}
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