dcx: complete decompression

Cargo.lock

@@ -1,5 +1,10 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "adler32"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
@@ -55,6 +60,25 @@ dependencies = [
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "flate2"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.10"
@@ -86,6 +110,14 @@ name = "memchr"
 version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "miniz_oxide"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "nodrop"
 version = "0.1.14"
@@ -141,6 +173,7 @@ name = "rusted_iron_ring"
 version = "0.1.0"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "nom 5.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-bigint 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -217,6 +250,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
+"checksum adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5d2e7343e7fc9de883d1b0341e0b13970f764c14101234857d2ddafa1cb1cac2"
 "checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)" = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
 "checksum atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
@@ -224,10 +258,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
 "checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
+"checksum crc32fast 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ba125de2af0df55319f41944744ad91c71113bf74a4646efff39afe1f6842db1"
+"checksum flate2 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "2cfff41391129e0a856d6d822600b8d71179d46879e310417eb9c762eb178b42"
 "checksum hermit-abi 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "725cf19794cf90aa94e65050cb4191ff5d8fa87a498383774c47b332e3af952e"
 "checksum lexical-core 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f86d66d380c9c5a685aaac7a11818bdfa1f733198dfd9ec09c70b762cd12ad6f"
 "checksum libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)" = "dea0c0405123bba743ee3f91f49b1c7cfb684eef0da0a50110f758ccf24cdff0"
 "checksum memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
+"checksum miniz_oxide 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "aa679ff6578b1cddee93d7e82e263b94a575e0bfced07284eb0c037c1d2416a5"
 "checksum nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 "checksum nom 5.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b471253da97532da4b61552249c521e01e736071f71c1a4f7ebbfbf0a06aad6"
 "checksum num-bigint 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"

Cargo.toml

@@ -16,3 +16,4 @@ clap = "2.33"
 nom = "5"
 num-bigint = "0.2"
 num-traits = "0.2"
+flate2 = "1.0"

src/parsers/dcx.rs

@@ -108,6 +108,6 @@ pub fn parse(i: &[u8]) -> IResult<&[u8], Dcx> {
     let pos_dcp = header.ofs_dcp as usize;
     let (_, params) = parse_params(&full_file[pos_dcp..])?;
     let pos_dca = pos_dcp + params.ofs_dca as usize;
-    let (_, archive) = parse_archive(&full_file[pos_dca..])?;
+    let (i, archive) = parse_archive(&full_file[pos_dca..])?;
     Ok((i, Dcx { header, sizes, params, archive }))
 }

src/unpackers/bhd.rs

@@ -11,6 +11,10 @@ use crate::unpackers::errors::{self as unpackers_errors, UnpackError};
 use crate::utils::fs as fs_utils;
 
 /// Parse a BHD file and extract its content.
+///
+/// As names are often a path rather than a simple file name,
+/// output path is used as the BHD root and required subdirs
+/// are automatically created.
 pub fn extract_bhd(
     bhd_path: &str,
     names: &HashMap<String, String>,
@@ -39,7 +43,7 @@ pub fn extract_bhd(
 }
 
 /// Extract files from a BHD/BDT pair.
-pub fn extract_files(
+fn extract_files(
     bhd: &bhd::Bhd,
     bdt_file: &mut fs::File,
     names: &HashMap<String, String>,

src/unpackers/dcx.rs

@@ -1,6 +1,7 @@
 use std::fs;
-use std::io::{Read};
+use std::io::{Read, Write};
 
+use flate2::read::ZlibDecoder;
 use nom::Err::{Error as NomError, Failure as NomFailure};
 
 use crate::parsers::dcx;
@@ -11,8 +12,8 @@ pub fn extract_dcx(dcx_path: &str, output_path: &str) -> Result<(), UnpackError>
     let file_len = dcx_file.metadata()?.len() as usize;
     let mut dcx_data = vec![0u8; file_len];
     dcx_file.read_exact(&mut dcx_data)?;
-    let dcx = match dcx::parse(&dcx_data) {
+    let (data, dcx) = match dcx::parse(&dcx_data) {
-        Ok((_, dcx)) => { dcx }
+        Ok(result) => { result }
         Err(NomError(e)) | Err(NomFailure(e)) => {
             let reason = unpackers_errors::get_nom_error_reason(e.1);
             return Err(UnpackError::Parsing("DCX parsing failed: ".to_owned() + &reason))
@@ -22,12 +23,29 @@ pub fn extract_dcx(dcx_path: &str, output_path: &str) -> Result<(), UnpackError>
         }
     };
 
+    let decomp_data = decompress_dcx(&dcx, data)?;
 
-    println!("{:?}", dcx);
+    let mut output_file = fs::File::create(output_path)?;
+    output_file.write_all(&decomp_data)?;
     Ok(())
 }
 
-pub fn decompress_dcx(dcx: &dcx::Dcx) -> Vec<u8> {
+fn decompress_dcx(dcx: &dcx::Dcx, comp_data: &[u8]) -> Result<Vec<u8>, UnpackError> {
-    let mut data = vec![0u8; dcx.sizes.uncompressed_size as usize];
+    let method: &[u8] = dcx.params.method.as_slice();
-    data
+    if method == b"DFLT" {
+        decompress_dcx_deflate(dcx, comp_data)
+    } else {
+        let method_string = match std::str::from_utf8(method) {
+            Ok(s) => { String::from(s) }
+            Err(_) => { format!("{:?}", method) }
+        };
+        Err(UnpackError::Compression(format!("Unknown method: {}", method_string)))
+    }
+}
+
+fn decompress_dcx_deflate(dcx: &dcx::Dcx, comp_data: &[u8]) -> Result<Vec<u8>, UnpackError> {
+    let mut data = vec![0u8; dcx.sizes.uncompressed_size as usize];
+    let mut deflater = ZlibDecoder::new(comp_data);
+    deflater.read_exact(&mut data)?;
+    Ok(data)
 }

src/unpackers/errors.rs

@@ -4,6 +4,7 @@ use std::io;
 pub enum UnpackError {
     Io(io::Error),
     Parsing(String),
+    Compression(String),
     Unknown(String),
 }