diff --git a/src/archive/dependency.rs b/src/archive/dependency.rs new file mode 100644 index 0000000..e41c51e --- /dev/null +++ b/src/archive/dependency.rs @@ -0,0 +1,31 @@ +use std::io::{Read, Result, Write}; + +use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; + +use crate::io::FromReader; + +#[allow(dead_code)] +#[derive(Debug, Clone, Copy)] +pub(crate) struct Dependency { + hash: u64, +} + +impl Dependency { + pub(crate) fn new(hash: u64) -> Self { + Self { hash } + } + + pub(crate) fn write(&self, writer: &mut W) -> Result<()> { + writer.write_u64::(self.hash)?; + Ok(()) + } +} +#[warn(dead_code)] + +impl FromReader for Dependency { + fn from_reader(reader: &mut R) -> Result { + Ok(Dependency { + hash: reader.read_u64::()?, + }) + } +} diff --git a/src/archive/file_entry.rs b/src/archive/file_entry.rs new file mode 100644 index 0000000..0506f4a --- /dev/null +++ b/src/archive/file_entry.rs @@ -0,0 +1,84 @@ +use std::io::{Read, Result, Write}; + +use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; + +use crate::io::FromReader; + +#[derive(Debug, Clone, Copy)] +pub(crate) struct FileEntry { + name_hash_64: u64, + timestamp: u64, //SystemTime, + num_inline_buffer_segments: u32, + segments_start: u32, + segments_end: u32, + resource_dependencies_start: u32, + resource_dependencies_end: u32, + sha1_hash: [u8; 20], +} + +impl FileEntry { + pub(crate) fn new( + name_hash_64: u64, + timestamp: u64, + num_inline_buffer_segments: u32, + segments_start: u32, + segments_end: u32, + resource_dependencies_start: u32, + resource_dependencies_end: u32, + sha1_hash: [u8; 20], + ) -> Self { + Self { + name_hash_64, + timestamp, + num_inline_buffer_segments, + segments_start, + segments_end, + resource_dependencies_start, + resource_dependencies_end, + sha1_hash, + } + } + + pub(crate) fn write(&self, writer: &mut W) -> Result<()> { + writer.write_u64::(self.name_hash_64)?; + writer.write_u64::(self.timestamp)?; + writer.write_u32::(self.num_inline_buffer_segments)?; + writer.write_u32::(self.segments_start)?; + writer.write_u32::(self.segments_end)?; + writer.write_u32::(self.resource_dependencies_start)?; + writer.write_u32::(self.resource_dependencies_end)?; + writer.write_all(self.sha1_hash.as_slice())?; + Ok(()) + } + + pub(crate) fn name_hash_64(&self) -> u64 { + self.name_hash_64 + } + + pub(crate) fn segments_start(&self) -> u32 { + self.segments_start + } + + pub(crate) fn segments_end(&self) -> u32 { + self.segments_end + } +} + +impl FromReader for FileEntry { + fn from_reader(reader: &mut R) -> Result { + let mut entry = FileEntry { + name_hash_64: reader.read_u64::()?, + timestamp: reader.read_u64::()?, + num_inline_buffer_segments: reader.read_u32::()?, + segments_start: reader.read_u32::()?, + segments_end: reader.read_u32::()?, + resource_dependencies_start: reader.read_u32::()?, + resource_dependencies_end: reader.read_u32::()?, + sha1_hash: [0; 20], + }; + + reader.read_exact(&mut entry.sha1_hash[..])?; + + Ok(entry) + } +} diff --git a/src/archive/file_segment.rs b/src/archive/file_segment.rs new file mode 100644 index 0000000..e065a74 --- /dev/null +++ b/src/archive/file_segment.rs @@ -0,0 +1,51 @@ +use std::io::{Read, Result, Write}; + +use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; + +use crate::io::FromReader; + +#[derive(Debug, Clone, Copy)] +pub(crate) struct FileSegment { + offset: u64, + z_size: u32, + size: u32, +} + +impl FileSegment { + pub(crate) fn new(offset: u64, z_size: u32, size: u32) -> Self { + Self { + offset, + z_size, + size, + } + } + + pub(crate) fn write(&self, writer: &mut W) -> Result<()> { + writer.write_u64::(self.offset)?; + writer.write_u32::(self.z_size)?; + writer.write_u32::(self.size)?; + Ok(()) + } + + pub(crate) fn offset(&self) -> u64 { + self.offset + } + + pub(crate) fn z_size(&self) -> u32 { + self.z_size + } + + pub(crate) fn size(&self) -> u32 { + self.size + } +} + +impl FromReader for FileSegment { + fn from_reader(reader: &mut R) -> Result { + Ok(FileSegment { + offset: reader.read_u64::()?, + z_size: reader.read_u32::()?, + size: reader.read_u32::()?, + }) + } +} diff --git a/src/archive/header.rs b/src/archive/header.rs new file mode 100644 index 0000000..33d37f3 --- /dev/null +++ b/src/archive/header.rs @@ -0,0 +1,86 @@ +use std::io::{Read, Result, Write}; + +use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; + +use crate::io::FromReader; + +#[derive(Debug, Clone, Copy)] +pub(crate) struct Header { + magic: u32, + version: u32, + index_position: u64, + index_size: u32, + debug_position: u64, + debug_size: u32, + filesize: u64, +} + +impl Header { + pub(crate) fn new( + index_position: u64, + index_size: u32, + debug_position: u64, + debug_size: u32, + filesize: u64, + ) -> Self { + Self { + magic: Header::HEADER_MAGIC, + version: Header::HEADER_VERSION, + index_position, + index_size, + debug_position, + debug_size, + filesize, + } + } + + pub(crate) const HEADER_MAGIC: u32 = 1380009042; + pub(crate) const HEADER_VERSION: u32 = 12; + pub(crate) const HEADER_SIZE: usize = 40; + pub(crate) const HEADER_EXTENDED_SIZE: u64 = 0xAC; + + pub(crate) fn index_position(&self) -> u64 { + self.index_position + } +} + +// impl Default for Header { +// fn default() -> Self { +// Self { +// magic: 1380009042, +// version: 12, +// index_position: Default::default(), +// index_size: Default::default(), +// debug_position: Default::default(), +// debug_size: Default::default(), +// filesize: Default::default(), +// } +// } +// } + +impl FromReader for Header { + fn from_reader(reader: &mut R) -> Result { + Ok(Header { + magic: reader.read_u32::()?, + version: reader.read_u32::()?, + index_position: reader.read_u64::()?, + index_size: reader.read_u32::()?, + debug_position: reader.read_u64::()?, + debug_size: reader.read_u32::()?, + filesize: reader.read_u64::()?, + }) + } +} +impl Header { + pub(crate) fn write(&self, writer: &mut W) -> Result<()> { + writer.write_u32::(self.magic)?; + writer.write_u32::(self.version)?; + writer.write_u64::(self.index_position)?; + writer.write_u32::(self.index_size)?; + writer.write_u64::(self.debug_position)?; + writer.write_u32::(self.debug_size)?; + writer.write_u64::(self.filesize)?; + + Ok(()) + } +} diff --git a/src/archive/index.rs b/src/archive/index.rs new file mode 100644 index 0000000..a4e8796 --- /dev/null +++ b/src/archive/index.rs @@ -0,0 +1,46 @@ +use std::io::{Read, Result}; + +use byteorder::{LittleEndian, ReadBytesExt}; + +use crate::io::FromReader; + +#[derive(Debug, Clone)] +pub(crate) struct Index { + /// Offset from the beginning of this struct, should be 8 + file_table_offset: u32, + /// byte size of the table + file_table_size: u32, + crc: u64, + file_entry_count: u32, + file_segment_count: u32, + resource_dependency_count: u32, +} + +impl Index { + pub(crate) fn file_entry_count(&self) -> u32 { + self.file_entry_count + } + + pub(crate) fn file_segment_count(&self) -> u32 { + self.file_segment_count + } + + pub(crate) fn resource_dependency_count(&self) -> u32 { + self.resource_dependency_count + } +} + +impl FromReader for Index { + fn from_reader(cursor: &mut R) -> Result { + let index = Index { + file_table_offset: cursor.read_u32::()?, + file_table_size: cursor.read_u32::()?, + crc: cursor.read_u64::()?, + file_entry_count: cursor.read_u32::()?, + file_segment_count: cursor.read_u32::()?, + resource_dependency_count: cursor.read_u32::()?, + }; + + Ok(index) + } +} diff --git a/src/archive/lxrs.rs b/src/archive/lxrs.rs new file mode 100644 index 0000000..1ab2636 --- /dev/null +++ b/src/archive/lxrs.rs @@ -0,0 +1,101 @@ +use std::{ + cmp::Ordering, + io::{Cursor, Error, ErrorKind, Read, Result, Write}, +}; + +use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; + +use crate::{io::*, kraken::*}; + +#[derive(Debug, Clone)] +pub(crate) struct LxrsFooter { + files: Vec, +} + +impl LxrsFooter { + pub(crate) fn new(files: Vec) -> Self { + Self { files } + } + + //const MINLEN: u32 = 20; + const MAGIC: u32 = 0x4C585253; + const VERSION: u32 = 1; + + pub(crate) fn write(&self, writer: &mut W) -> Result<()> { + writer.write_u32::(self.files.len() as u32)?; + writer.write_u32::(LxrsFooter::VERSION)?; + + // write strings to buffer + let mut buffer: Vec = Vec::new(); + for f in &self.files { + write_null_terminated_string(&mut buffer, f.to_owned())?; + } + + // compress + let size = buffer.len(); + let compressed_size_needed = get_compressed_buffer_size_needed(size as u64); + let mut compressed_buffer = vec![0; compressed_size_needed as usize]; + let zsize = compress(&buffer, &mut compressed_buffer, CompressionLevel::Normal); + assert!((zsize as u32) <= size as u32); + compressed_buffer.resize(zsize as usize, 0); + + // write to writer + writer.write_all(&compressed_buffer)?; + + Ok(()) + } + + pub(crate) fn files(&self) -> &[String] { + self.files.as_ref() + } +} +impl FromReader for LxrsFooter { + fn from_reader(reader: &mut R) -> Result { + let magic = reader.read_u32::()?; + if magic != LxrsFooter::MAGIC { + return Err(Error::new(ErrorKind::Other, "invalid magic")); + } + let _version = reader.read_u32::()?; + let size = reader.read_u32::()?; + let zsize = reader.read_u32::()?; + let count = reader.read_i32::()?; + + let mut files: Vec = vec![]; + match size.cmp(&zsize) { + Ordering::Greater => { + // buffer is compressed + let mut compressed_buffer = vec![0; zsize as usize]; + reader.read_exact(&mut compressed_buffer[..])?; + let mut output_buffer = vec![]; + let result = decompress(compressed_buffer, &mut output_buffer, size as usize); + assert_eq!(result as u32, size); + + // read from buffer + let mut inner_cursor = Cursor::new(&output_buffer); + for _i in 0..count { + // read NullTerminatedString + if let Ok(string) = read_null_terminated_string(&mut inner_cursor) { + files.push(string); + } + } + } + Ordering::Less => { + // error + return Err(Error::new(ErrorKind::Other, "invalid buffer")); + } + Ordering::Equal => { + // no compression + for _i in 0..count { + // read NullTerminatedString + if let Ok(string) = read_null_terminated_string(reader) { + files.push(string); + } + } + } + } + + let footer = LxrsFooter { files }; + + Ok(footer) + } +} diff --git a/src/archive.rs b/src/archive/mod.rs similarity index 68% rename from src/archive.rs rename to src/archive/mod.rs index 971b5fd..2ffb154 100644 --- a/src/archive.rs +++ b/src/archive/mod.rs @@ -4,7 +4,6 @@ use std::{ borrow::BorrowMut, - cmp::Ordering, collections::{HashMap, HashSet}, fs::{create_dir_all, File}, io::{self, BufWriter, Cursor, Error, ErrorKind, Read, Result, Seek, SeekFrom, Write}, @@ -15,10 +14,18 @@ use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; use strum::IntoEnumIterator; use walkdir::WalkDir; -use crate::fnv1a64_hash_string; -use crate::io::*; use crate::kraken::*; use crate::{cr2w::*, *}; +use crate::{fnv1a64_hash_string, io::FromReader}; + +use self::{dependency::*, file_entry::*, file_segment::*, header::*, index::*, lxrs::*}; + +mod dependency; +mod file_entry; +mod file_segment; +mod header; +mod index; +mod lxrs; ///////////////////////////////////////////////////////////////////////////////////////// // ARCHIVE_FILE @@ -218,16 +225,13 @@ where let mut archive_writer = BufWriter::new(out_stream); // write empty header - let header = Header::default(); - header.serialize(&mut archive_writer)?; + archive_writer.write_all(&[0u8; Header::HEADER_SIZE])?; //write empty header archive_writer.write_all(&[0u8; 132])?; // padding // write custom header let mut custom_data_length = 0; if !custom_paths.is_empty() { - let wfooter = LxrsFooter { - files: custom_paths, - }; + let wfooter = LxrsFooter::new(custom_paths); wfooter.write(&mut archive_writer)?; custom_data_length = archive_writer.stream_position()? - Header::HEADER_EXTENDED_SIZE; } @@ -280,11 +284,7 @@ where archive_writer.write_all(&compressed_buffer)?; // add metadata to archive - segment = Some(FileSegment { - offset: archive_offset, - size, - z_size: zsize as u32, - }); + segment = Some(FileSegment::new(archive_offset, zsize as u32, size)); file_segments_cnt += 1; // write buffers (bytes after the main file) @@ -298,11 +298,7 @@ where archive_writer.write_all(buffer.as_slice())?; // add metadata to archive - buffers.push(FileSegment { - offset: boffset, - size: bsize, - z_size: bzsize, - }); + buffers.push(FileSegment::new(boffset, bzsize, bsize)); file_segments_cnt += 1; } @@ -353,11 +349,7 @@ where } // add metadata to archive - segment = Some(FileSegment { - offset, - size, - z_size: final_zsize, - }); + segment = Some(FileSegment::new(offset, final_zsize, size)); file_segments_cnt += 1; } } @@ -365,16 +357,16 @@ where // update archive metadata let sha1_hash = sha1_hash_file(&file_buffer); - let entry = FileEntry { - name_hash_64: hash, - timestamp: 0, // TODO proper timestamps - num_inline_buffer_segments: flags as u32, - segments_start: firstoffsetidx as u32, - segments_end: lastoffsetidx as u32, - resource_dependencies_start: firstimportidx as u32, - resource_dependencies_end: lastimportidx as u32, + let entry = FileEntry::new( + hash, + 0, + flags as u32, + firstoffsetidx as u32, + lastoffsetidx as u32, + firstimportidx as u32, + lastimportidx as u32, sha1_hash, - }; + ); if let Some(segment) = segment { let wrapped_entry = ZipEntry { @@ -389,37 +381,27 @@ where } // write footers - let archive = ZipArchive { - stream: todo!(), - mode: ArchiveMode::Create, - entries, - dirty: false, - dependencies: imports_hash_set - .iter() - .map(|e| Dependency { - hash: fnv1a64_hash_string(e), - }) - .collect::>(), - }; + let dependencies = imports_hash_set + .iter() + .map(|e| Dependency::new(fnv1a64_hash_string(e))) + .collect::>(); // padding pad_until_page(&mut archive_writer)?; // write tables let tableoffset = archive_writer.stream_position()?; - archive.write_index(&mut archive_writer)?; + write_index(&mut archive_writer, &entries, &dependencies)?; let tablesize = archive_writer.stream_position()? - tableoffset; // padding pad_until_page(&mut archive_writer)?; - let filesize = archive_writer.stream_position()?; // write the header again - header.index_position = tableoffset; - header.index_size = tablesize as u32; - header.filesize = filesize; + let filesize = archive_writer.stream_position()?; + let header = Header::new(tableoffset, tablesize as u32, 0, 0, filesize); archive_writer.seek(SeekFrom::Start(0))?; - header.serialize(&mut archive_writer)?; + header.write(&mut archive_writer)?; archive_writer.write_u32::(custom_data_length as u32)?; Ok(()) @@ -459,17 +441,17 @@ fn decompress_segment( segment: &FileSegment, file_writer: &mut W, ) -> Result<()> { - archive_reader.seek(SeekFrom::Start(segment.offset))?; + archive_reader.seek(SeekFrom::Start(segment.offset()))?; let magic = archive_reader.read_u32::()?; if magic == kraken::MAGIC { // read metadata - let mut size = segment.size; + let mut size = segment.size(); let size_in_header = archive_reader.read_u32::()?; if size_in_header != size { size = size_in_header; } - let mut compressed_buffer = vec![0; segment.z_size as usize - 8]; + let mut compressed_buffer = vec![0; segment.z_size() as usize - 8]; archive_reader.read_exact(&mut compressed_buffer[..])?; let mut output_buffer = vec![]; let result = decompress(compressed_buffer, &mut output_buffer, size as usize); @@ -479,8 +461,8 @@ fn decompress_segment( file_writer.write_all(&output_buffer)?; } else { // incorrect data, fall back to direct copy - archive_reader.seek(SeekFrom::Start(segment.offset))?; - let mut buffer = vec![0; segment.z_size as usize]; + archive_reader.seek(SeekFrom::Start(segment.offset()))?; + let mut buffer = vec![0; segment.z_size() as usize]; archive_reader.read_exact(&mut buffer[..])?; file_writer.write_all(&buffer)?; }; @@ -721,18 +703,18 @@ where let segment = entry.segment; let buffers = entry.buffers.clone(); - if segment.size == segment.z_size { + if segment.size() == segment.z_size() { // just copy - self.reader_mut().seek(SeekFrom::Start(segment.offset))?; - let mut buffer = vec![0; segment.z_size as usize]; + self.reader_mut().seek(SeekFrom::Start(segment.offset()))?; + let mut buffer = vec![0; segment.z_size() as usize]; self.reader_mut().read_exact(&mut buffer[..])?; writer.write_all(&buffer)?; } else { decompress_segment(self.reader_mut(), &segment, &mut writer)?; } for segment in buffers { - self.reader_mut().seek(SeekFrom::Start(segment.offset))?; - let mut buffer = vec![0; segment.z_size as usize]; + self.reader_mut().seek(SeekFrom::Start(segment.offset()))?; + let mut buffer = vec![0; segment.z_size() as usize]; self.reader_mut().read_exact(&mut buffer[..])?; writer.write_all(&buffer)?; } @@ -763,9 +745,9 @@ where reader.seek(io::SeekFrom::Start(Header::HEADER_EXTENDED_SIZE))?; if let Ok(footer) = LxrsFooter::from_reader(&mut reader) { // add files to hashmap - for f in footer.files { - let hash = fnv1a64_hash_string(&f); - file_names.insert(hash, f); + for f in footer.files() { + let hash = fnv1a64_hash_string(f); + file_names.insert(hash, f.to_owned()); } } } @@ -773,24 +755,24 @@ where // read index // move to offset Header.IndexPosition - reader.seek(io::SeekFrom::Start(header.index_position))?; + reader.seek(io::SeekFrom::Start(header.index_position()))?; let index = Index::from_reader(&mut reader)?; // read tables let mut file_entries: HashMap = HashMap::default(); - for _i in 0..index.file_entry_count { + for _i in 0..index.file_entry_count() { let entry = FileEntry::from_reader(&mut reader)?; - file_entries.insert(entry.name_hash_64, entry); + file_entries.insert(entry.name_hash_64(), entry); } let mut file_segments = Vec::default(); - for _i in 0..index.file_segment_count { + for _i in 0..index.file_segment_count() { file_segments.push(FileSegment::from_reader(&mut reader)?); } // dependencies can't be connected to individual files anymore let mut dependencies = Vec::default(); - for _i in 0..index.resource_dependency_count { + for _i in 0..index.resource_dependency_count() { dependencies.push(Dependency::from_reader(&mut reader)?); } @@ -803,8 +785,8 @@ where None }; - let start_index = entry.segments_start; - let next_index = entry.segments_end; + let start_index = entry.segments_start(); + let next_index = entry.segments_end(); if let Some(segment) = file_segments.get(start_index as usize) { let mut buffers: Vec = vec![]; for i in start_index + 1..next_index { @@ -840,58 +822,6 @@ impl ZipArchive { todo!() } - fn write_index(&mut self, writer: &mut W) -> Result<()> { - let file_entry_count = self.entries.len() as u32; - let buffer_counts = self.entries.iter().map(|e| e.1.buffers.len() + 1); - let file_segment_count = buffer_counts.sum::() as u32; - let resource_dependency_count = self.dependencies.len() as u32; - - // todo write table to buffer - let mut buffer: Vec = Vec::new(); - //let mut table_writer = Cursor::new(buffer); - buffer.write_u32::(file_entry_count)?; - buffer.write_u32::(file_segment_count)?; - buffer.write_u32::(resource_dependency_count)?; - let mut entries = self.entries.values().collect::>(); - entries.sort_by_key(|e| e.hash); - // write entries - let mut segments = Vec::default(); - for entry in entries { - entry.entry.write(&mut buffer)?; - // collect offsets - segments.push(entry.segment); - for buffer in &entry.buffers { - segments.push(buffer.clone()); - } - } - // write segments - for segment in segments { - segment.write(&mut buffer)?; - } - - // write dependencies - for dependency in &self.dependencies { - dependency.write(&mut buffer)?; - } - - // write to out stream - let crc = crc64::crc64(0, buffer.as_slice()); - let index = Index { - file_table_offset: 8, - file_table_size: buffer.len() as u32 + 8, - crc, - file_entry_count, - file_segment_count, - resource_dependency_count, - }; - writer.write_u32::(index.file_table_offset)?; - writer.write_u32::(index.file_table_size)?; - writer.write_u64::(index.crc)?; - writer.write_all(buffer.as_slice())?; - - Ok(()) - } - /// Compresses and adds a file to the archive. /// /// # Errors @@ -972,266 +902,52 @@ impl ZipEntry { // INTERNAL ///////////////////////////////////////////////////////////////////////////////////////// -#[derive(Debug, Clone, Copy)] -struct Header { - magic: u32, - version: u32, - index_position: u64, - index_size: u32, - debug_position: u64, - debug_size: u32, - filesize: u64, -} - -impl Header { - //static HEADER_MAGIC: u32 = 1380009042; - //static HEADER_SIZE: i32 = 40; - const HEADER_EXTENDED_SIZE: u64 = 0xAC; -} - -impl Default for Header { - fn default() -> Self { - Self { - magic: 1380009042, - version: 12, - index_position: Default::default(), - index_size: Default::default(), - debug_position: Default::default(), - debug_size: Default::default(), - filesize: Default::default(), +fn write_index( + writer: &mut W, + entries: &HashMap, + dependencies: &[Dependency], +) -> Result<()> { + let file_entry_count = entries.len() as u32; + let buffer_counts = entries.iter().map(|e| e.1.buffers.len() + 1); + let file_segment_count = buffer_counts.sum::() as u32; + let resource_dependency_count = dependencies.len() as u32; + + // todo write table to buffer + let mut buffer: Vec = Vec::new(); + //let mut table_writer = Cursor::new(buffer); + buffer.write_u32::(file_entry_count)?; + buffer.write_u32::(file_segment_count)?; + buffer.write_u32::(resource_dependency_count)?; + let mut entries = entries.values().collect::>(); + entries.sort_by_key(|e| e.hash); + // write entries + let mut segments = Vec::default(); + for entry in entries { + entry.entry.write(&mut buffer)?; + // collect offsets + segments.push(entry.segment); + for buffer in &entry.buffers { + segments.push(buffer.clone()); } } -} - -impl FromReader for Header { - fn from_reader(reader: &mut R) -> Result { - Ok(Header { - magic: reader.read_u32::()?, - version: reader.read_u32::()?, - index_position: reader.read_u64::()?, - index_size: reader.read_u32::()?, - debug_position: reader.read_u64::()?, - debug_size: reader.read_u32::()?, - filesize: reader.read_u64::()?, - }) - } -} -impl Header { - fn serialize(&self, writer: &mut W) -> Result<()> { - writer.write_u32::(self.magic)?; - writer.write_u32::(self.version)?; - writer.write_u64::(self.index_position)?; - writer.write_u32::(self.index_size)?; - writer.write_u64::(self.debug_position)?; - writer.write_u32::(self.debug_size)?; - writer.write_u64::(self.filesize)?; - - Ok(()) - } -} - -#[derive(Debug, Clone)] -struct Index { - /// Offset from the beginning of this struct, should be 8 - file_table_offset: u32, - /// byte size of the table - file_table_size: u32, - crc: u64, - file_entry_count: u32, - file_segment_count: u32, - resource_dependency_count: u32, -} -impl Index {} -impl FromReader for Index { - fn from_reader(cursor: &mut R) -> io::Result { - let index = Index { - file_table_offset: cursor.read_u32::()?, - file_table_size: cursor.read_u32::()?, - crc: cursor.read_u64::()?, - file_entry_count: cursor.read_u32::()?, - file_segment_count: cursor.read_u32::()?, - resource_dependency_count: cursor.read_u32::()?, - }; - - Ok(index) - } -} - -#[derive(Debug, Clone, Copy)] -struct FileSegment { - offset: u64, - z_size: u32, - size: u32, -} - -impl FileSegment { - fn write(&self, writer: &mut W) -> Result<()> { - writer.write_u64::(self.offset)?; - writer.write_u32::(self.z_size)?; - writer.write_u32::(self.size)?; - Ok(()) - } -} - -impl FromReader for FileSegment { - fn from_reader(reader: &mut R) -> io::Result { - Ok(FileSegment { - offset: reader.read_u64::()?, - z_size: reader.read_u32::()?, - size: reader.read_u32::()?, - }) - } -} -#[derive(Debug, Clone, Copy)] -struct FileEntry { - name_hash_64: u64, - timestamp: u64, //SystemTime, - num_inline_buffer_segments: u32, - segments_start: u32, - segments_end: u32, - resource_dependencies_start: u32, - resource_dependencies_end: u32, - sha1_hash: [u8; 20], -} - -impl FileEntry { - fn write(&self, writer: &mut W) -> Result<()> { - writer.write_u64::(self.name_hash_64)?; - writer.write_u64::(self.timestamp)?; - writer.write_u32::(self.num_inline_buffer_segments)?; - writer.write_u32::(self.segments_start)?; - writer.write_u32::(self.segments_end)?; - writer.write_u32::(self.resource_dependencies_start)?; - writer.write_u32::(self.resource_dependencies_end)?; - writer.write_all(self.sha1_hash.as_slice())?; - Ok(()) - } -} - -impl FromReader for FileEntry { - fn from_reader(reader: &mut R) -> io::Result { - let mut entry = FileEntry { - name_hash_64: reader.read_u64::()?, - timestamp: reader.read_u64::()?, - num_inline_buffer_segments: reader.read_u32::()?, - segments_start: reader.read_u32::()?, - segments_end: reader.read_u32::()?, - resource_dependencies_start: reader.read_u32::()?, - resource_dependencies_end: reader.read_u32::()?, - sha1_hash: [0; 20], - }; - - reader.read_exact(&mut entry.sha1_hash[..])?; - - Ok(entry) - } -} - -#[allow(dead_code)] -#[derive(Debug, Clone, Copy)] -struct Dependency { - hash: u64, -} - -impl Dependency { - fn write(&self, writer: &mut W) -> Result<()> { - writer.write_u64::(self.hash)?; - Ok(()) - } -} -#[warn(dead_code)] - -impl FromReader for Dependency { - fn from_reader(reader: &mut R) -> io::Result { - Ok(Dependency { - hash: reader.read_u64::()?, - }) + // write segments + for segment in segments { + segment.write(&mut buffer)?; } -} - -#[derive(Debug, Clone)] -struct LxrsFooter { - files: Vec, -} - -impl LxrsFooter { - //const MINLEN: u32 = 20; - const MAGIC: u32 = 0x4C585253; - const VERSION: u32 = 1; - fn write(&self, writer: &mut W) -> Result<()> { - writer.write_u32::(self.files.len() as u32)?; - writer.write_u32::(LxrsFooter::VERSION)?; - - // write strings to buffer - let mut buffer: Vec = Vec::new(); - for f in &self.files { - write_null_terminated_string(&mut buffer, f.to_owned())?; - } - - // compress - let size = buffer.len(); - let compressed_size_needed = get_compressed_buffer_size_needed(size as u64); - let mut compressed_buffer = vec![0; compressed_size_needed as usize]; - let zsize = compress(&buffer, &mut compressed_buffer, CompressionLevel::Normal); - assert!((zsize as u32) <= size as u32); - compressed_buffer.resize(zsize as usize, 0); - - // write to writer - writer.write_all(&compressed_buffer)?; - - Ok(()) + // write dependencies + for dependency in dependencies { + dependency.write(&mut buffer)?; } -} -impl FromReader for LxrsFooter { - fn from_reader(reader: &mut R) -> io::Result { - let magic = reader.read_u32::()?; - if magic != LxrsFooter::MAGIC { - return Err(io::Error::new(io::ErrorKind::Other, "invalid magic")); - } - let _version = reader.read_u32::()?; - let size = reader.read_u32::()?; - let zsize = reader.read_u32::()?; - let count = reader.read_i32::()?; - - let mut files: Vec = vec![]; - match size.cmp(&zsize) { - Ordering::Greater => { - // buffer is compressed - let mut compressed_buffer = vec![0; zsize as usize]; - reader.read_exact(&mut compressed_buffer[..])?; - let mut output_buffer = vec![]; - let result = decompress(compressed_buffer, &mut output_buffer, size as usize); - assert_eq!(result as u32, size); - - // read from buffer - let mut inner_cursor = io::Cursor::new(&output_buffer); - for _i in 0..count { - // read NullTerminatedString - if let Ok(string) = read_null_terminated_string(&mut inner_cursor) { - files.push(string); - } - } - } - Ordering::Less => { - // error - return Err(io::Error::new(io::ErrorKind::Other, "invalid buffer")); - } - Ordering::Equal => { - // no compression - for _i in 0..count { - // read NullTerminatedString - if let Ok(string) = read_null_terminated_string(reader) { - files.push(string); - } - } - } - } - let footer = LxrsFooter { files }; + // write to out stream + let crc = crc64::crc64(0, buffer.as_slice()); + writer.write_u32::(8)?; + writer.write_u32::(buffer.len() as u32 + 8)?; + writer.write_u64::(crc)?; + writer.write_all(buffer.as_slice())?; - Ok(footer) - } + Ok(()) } ///////////////////////////////////////////////////////////////////////////////////////// diff --git a/src/io.rs b/src/io.rs index 4bf5194..cacd754 100644 --- a/src/io.rs +++ b/src/io.rs @@ -5,7 +5,7 @@ use std::io::{self, Read, Write}; use byteorder::WriteBytesExt; -pub trait FromReader: Sized { +pub(crate) trait FromReader: Sized { fn from_reader(reader: &mut R) -> io::Result; }