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patterns/lcesave: Use Virtual Filesystem + ZLib support + auto endian detection (#309)

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* use Virtual Filesystem + ZLib support + auto endian detection

* fix builtin

* smh how am I only noticing that I just duplicated a function for no reason

* ifdefs to fix actions moment
This commit is contained in:
Dexrn ZacAttack
2024-11-17 04:58:56 -08:00
committed by GitHub
parent 85f5541350
commit bc5a55affe
1 changed files with 36 additions and 9 deletions
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45
patterns/lcesave.hexpat
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@@ -1,17 +1,16 @@
#pragma author DexrnZacAttack
#pragma description Decompressed Minecraft LCE Save File
#pragma endian big
/* ^ switch this to little for Switch, PS4, or Xbox One */
#pragma description Minecraft LCE Save File
// NOTE: This pattern was only tested on Nightly@974c4ba, things may break/not work on older versions.
// ALSO NOTE: SPEGHETTI CODE!
// TODO: re-add nbt pattern
// TODO: clean up getFileType
// NOTE: SPEGHETTI CODE!
import std.string;
import std.mem;
import std.core;
import hex.dec;
#ifdef __IMHEX__
import hex.core;
#endif
#pragma pattern_limit 1000000
#pragma array_limit 1000000
@@ -51,8 +50,12 @@ struct LCEIndex {
if (parent.header.curVersion > 1)
u64 timestamp [[name("File Timestamp")]]; // useless as it writes weirdly, and differently on certain consoles. (e.g using time since last reset, etc)
u8 file[filesize] @ offset [[name(this.filename),comment(getFileType(std::string::to_string(filename))),attribute_name(this.filename)]]; // files in the index
#ifdef __IMHEX__
hex::core::add_virtual_file(std::string::to_string(filename), file);
#endif
} [[name("(" + getFileType(std::string::to_string(filename)) + ") " + std::string::to_string(this.filename))]];
struct LCEHeader {
u32 offset [[name("Index Offset")]]; // where the index is located
u32 count [[name("Index File Count")]]; // amount of files in the index
@@ -60,7 +63,31 @@ struct LCEHeader {
u16 curVersion [[name("Current LCE file version")]]; // Version that the file was written with
};
struct CompressedSave {
be u64 zlibSize;
u8 zlibData[std::mem::size() - 8];
std::mem::Section zlib = std::mem::create_section(std::format("Compressed Save"));
hex::dec::zlib_decompress(zlibData, zlib, 15);
u8 decompressed[zlibSize] @ 0x00 in zlib;
#ifdef __IMHEX__
hex::core::add_virtual_file("save", decompressed);
#endif
std::error("This save is ZLib-compressed, grab the decompressed save from the Virtual Filesystem tab and use this pattern on it.");
};
struct LCESave {
u8 zlibMagic[2] @ 0x08 [[hidden]];
// check if header matches
if (zlibMagic[0] == 0x78 && zlibMagic[1] == 0x9C)
CompressedSave compSave @ 0x00;
// if not we will have continued.
le u16 endianCheck @ 0x0A [[hidden]];
// check if version is bigger than 14
if (endianCheck > 14)
std::core::set_endian(std::mem::Endian::Big);
// rest of the processing
LCEHeader header [[name("Header")]];
if (header.curVersion > 1)
LCEIndex index[header.count] @ header.offset [[name("File Index")]]; // the index