45 lines
3.5 KiB
C++
45 lines
3.5 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(Byte: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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// byte: Tag( 1, String:name, uint16:name_size, byte: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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// float32: Tag( 5, String:name, uint16:name_size, float32:content,4) => 32 bit IEEE754 floating point number, size not stored
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// float64: Tag( 6, String:name, uint16:name_size, float64:content,8) => 64 bit IEEE754 floating point number, size not stored
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// byte[]: Tag( 7, String:name, uint16:name_size, byte[]:content, int32:size) => content stored prefixed with size
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// String: Tag( 8, String:name, uint16:name_size, byte[]: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 "error.h++"
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namespace NBT {
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bool validateRawNBTData(uint8_t* data[], int length);
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}
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