3 files changed, 47 insertions, 19 deletions

diff --git a/crates/msh-core/Cargo.toml b/crates/msh-core/Cargo.toml
index cdea317..86b0846 100644
--- a/crates/msh-core/Cargo.toml
+++ b/crates/msh-core/Cargo.toml
@@ -4,4 +4,9 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+encoding_rs = "0.8"
 nres = { path = "../nres" }
+
+[dev-dependencies]
+common = { path = "../common" }
+proptest = "1"
diff --git a/crates/msh-core/src/lib.rs b/crates/msh-core/src/lib.rs
index 1a50fb7..bc51357 100644
--- a/crates/msh-core/src/lib.rs
+++ b/crates/msh-core/src/lib.rs
@@ -1,6 +1,7 @@
 pub mod error;
 
 use crate::error::Error;
+use encoding_rs::WINDOWS_1251;
 use std::sync::Arc;
 
 pub type Result<T> = core::result::Result<T, Error>;
@@ -347,13 +348,18 @@ fn parse_res10_names(data: &[u8], node_count: usize) -> Result<Vec<Option<String
         } else {
             slice
         };
-        let decoded = String::from_utf8_lossy(text).to_string();
+        let decoded = decode_cp1251(text);
         out.push(Some(decoded));
         off = end;
     }
     Ok(out)
 }
 
+fn decode_cp1251(bytes: &[u8]) -> String {
+    let (decoded, _, _) = WINDOWS_1251.decode(bytes);
+    decoded.into_owned()
+}
+
 struct RawResource {
     meta: nres::EntryMeta,
     bytes: Vec<u8>,
diff --git a/crates/msh-core/src/tests.rs b/crates/msh-core/src/tests.rs
index 07b05c7..90a7fdc 100644
--- a/crates/msh-core/src/tests.rs
+++ b/crates/msh-core/src/tests.rs
@@ -1,22 +1,10 @@
 use super::*;
+use common::collect_files_recursive;
 use nres::Archive;
+use proptest::prelude::*;
 use std::fs;
 use std::path::{Path, PathBuf};
 
-fn collect_files_recursive(root: &Path, out: &mut Vec<PathBuf>) {
-    let Ok(entries) = fs::read_dir(root) else {
-        return;
-    };
-    for entry in entries.flatten() {
-        let path = entry.path();
-        if path.is_dir() {
-            collect_files_recursive(&path, out);
-        } else if path.is_file() {
-            out.push(path);
-        }
-    }
-}
-
 fn nres_test_files() -> Vec<PathBuf> {
     let root = Path::new(env!("CARGO_MANIFEST_DIR"))
         .join("..")
@@ -169,18 +157,17 @@ fn res13_single_batch(index_start: u32, index_count: u16) -> Vec<u8> {
     batch
 }
 
-fn res10_names(names: &[Option<&str>]) -> Vec<u8> {
+fn res10_names_raw(names: &[Option<&[u8]>]) -> Vec<u8> {
     let mut out = Vec::new();
     for name in names {
         match name {
             Some(name) => {
-                let bytes = name.as_bytes();
                 out.extend_from_slice(
-                    &u32::try_from(bytes.len())
+                    &u32::try_from(name.len())
                         .expect("name size overflow in test")
                         .to_le_bytes(),
                 );
-                out.extend_from_slice(bytes);
+                out.extend_from_slice(name);
                 out.push(0);
             }
             None => out.extend_from_slice(&0u32.to_le_bytes()),
@@ -189,6 +176,11 @@ fn res10_names(names: &[Option<&str>]) -> Vec<u8> {
     out
 }
 
+fn res10_names(names: &[Option<&str>]) -> Vec<u8> {
+    let raw: Vec<Option<&[u8]>> = names.iter().map(|name| name.map(str::as_bytes)).collect();
+    res10_names_raw(&raw)
+}
+
 fn base_synthetic_entries() -> Vec<SyntheticEntry> {
     vec![
         synthetic_entry(RES1_NODE_TABLE, "Res1", 38, res1_stride38_nodes(1, Some(0))),
@@ -340,6 +332,22 @@ fn parse_synthetic_model_with_optional_res4_res5_res10() {
 }
 
 #[test]
+fn parse_res10_names_decodes_cp1251() {
+    let mut entries = base_synthetic_entries();
+    entries[0] = synthetic_entry(RES1_NODE_TABLE, "Res1", 38, res1_stride38_nodes(1, Some(0)));
+    entries.push(synthetic_entry(
+        RES10_NAMES,
+        "Res10",
+        1,
+        res10_names_raw(&[Some(&[0xC0])]),
+    ));
+    let payload = build_nested_nres(&entries);
+
+    let model = parse_model_payload(&payload).expect("failed to parse model with cp1251 name");
+    assert_eq!(model.node_names, Some(vec![Some("А".to_string())]));
+}
+
+#[test]
 fn parse_fails_when_required_resource_missing() {
     let mut entries = base_synthetic_entries();
     entries.retain(|entry| entry.kind != RES13_BATCHES);
@@ -419,3 +427,12 @@ fn parse_fails_for_batch_index_range_out_of_bounds() {
         })
     ));
 }
+
+proptest! {
+    #![proptest_config(ProptestConfig::with_cases(64))]
+
+    #[test]
+    fn parse_model_payload_never_panics_on_random_bytes(data in proptest::collection::vec(any::<u8>(), 0..8192)) {
+        let _ = parse_model_payload(&data);
+    }
+}