start implementing SGD

Cargo.lock

@@ -44,6 +44,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "equivalent"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+
 [[package]]
 name = "fot-save-edit"
 version = "0.1.0"
@@ -52,10 +58,27 @@ dependencies = [
  "byteorder",
  "deflate",
  "encoding_rs",
+ "indexmap",
  "inflate",
  "memmem",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
+
+[[package]]
+name = "indexmap"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5477fe2230a79769d8dc68e0eabf5437907c0457a5614a9e8dddb67f65eb65d"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
 [[package]]
 name = "inflate"
 version = "0.4.5"

Cargo.toml

@@ -10,5 +10,6 @@ anyhow = "1.0.75"
 byteorder = "1.4.3"
 deflate = "1.0.0"
 encoding_rs = "0.8.33"
+indexmap = "2.0.0"
 inflate = "0.4.5"
 memmem = "0.1.1"

src/fot.rs

@@ -2,6 +2,7 @@ mod decoder;
 mod fstring;
 mod raw;
 pub mod save;
+mod sgd;
 mod stream;
 mod tag;
 mod world;

src/fot/fstring.rs

@@ -7,13 +7,13 @@ use std::io::Cursor;
 
 // FString - Fallout
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug, Hash, PartialEq, Eq)]
 pub enum FStringEncoding {
     ANSI,
     WCS2,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Hash, PartialEq, Eq)]
 pub struct FString {
     pub encoding: FStringEncoding,
     pub enc_len: usize,

src/fot/sgd.rs

@@ -0,0 +1,57 @@
+use super::decoder::Decoder;
+use super::fstring::FString;
+use super::raw::Raw;
+use super::stream::{ReadStream, WriteStream};
+use super::tag::Tag;
+use anyhow::Result;
+use indexmap::IndexMap;
+
+pub struct SGD {
+    tag: Tag,
+    unk1: Vec<u8>,
+    pub dialogs: IndexMap<FString, Vec<FString>>,
+    enc_size: usize,
+}
+
+impl Decoder for SGD {
+    fn decode(raw: &Raw, offset: usize, size: usize) -> Result<Self> {
+        let mut rd = ReadStream::new(raw, offset);
+        let tag: Tag = rd.read(0)?;
+        let unk1 = rd.read_bytes(0x48)?;
+        let mut dialogs: IndexMap<FString, Vec<FString>> = IndexMap::new();
+
+        let n = rd.read_u32()? as usize;
+        let mut names: Vec<FString> = Vec::with_capacity(n);
+        for _ in 0..n {
+            names.push(rd.read::<FString>(0)?);
+        }
+
+        let m = rd.read_u32()? as usize;
+        assert!(m == n, "SGD m != n");
+        for _ in 0..m {
+            let k = rd.read_u32()? as usize;
+            let mut lines: Vec<FString> = Vec::with_capacity(k);
+            for _ in 0..k {
+                lines.push(rd.read::<FString>(0)?);
+            }
+
+            dialogs.insert(names.remove(m), lines);
+        }
+
+        let enc_size = rd.offset() - offset;
+        Ok(SGD {
+            tag,
+            unk1,
+            dialogs,
+            enc_size,
+        })
+    }
+
+    fn encode(&self) -> Result<Raw> {
+        todo!();
+    }
+
+    fn get_enc_size(&self) -> usize {
+        todo!()
+    }
+}

src/fot/stream.rs

@@ -1,5 +1,6 @@
 use super::decoder::Decoder;
 use super::raw::Raw;
+use anyhow::anyhow;
 use anyhow::Result;
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 use std::io::Cursor;
@@ -10,9 +11,9 @@ pub struct ReadStream<'a> {
 }
 
 impl<'a> ReadStream<'a> {
-    pub fn new(raw: &Raw, start: usize) -> ReadStream {
+    pub fn new(raw: &Raw, offset: usize) -> ReadStream {
         let mut rdr = Cursor::new(&raw.mem[..]);
-        rdr.set_position(start as u64);
+        rdr.set_position(offset as u64);
         ReadStream { raw: raw, rdr: rdr }
     }
 
@@ -24,6 +25,14 @@ impl<'a> ReadStream<'a> {
         self.rdr.set_position(self.rdr.position() + size as u64);
     }
 
+    pub fn read_bytes(&mut self, size: usize) -> Result<Vec<u8>> {
+        if self.offset() + size > self.raw.mem.len() {
+            Err(anyhow!("read_bytes size is bigger than buffer"))
+        } else {
+            Ok(self.raw.mem[self.offset()..self.offset() + size].to_vec())
+        }
+    }
+
     pub fn read<T: Decoder>(&mut self, size: usize) -> Result<T> {
         let val = T::decode(&self.raw, self.offset(), size)?;
         self.skip(val.get_enc_size());

src/fot/tag.rs

@@ -1,6 +1,6 @@
-use super::stream::{ReadStream, WriteStream};
 use super::decoder::Decoder;
 use super::raw::Raw;
+use super::stream::{ReadStream, WriteStream};
 use anyhow::Result;
 
 #[derive(Debug)]