修bug，完善功能

chusql-core/storage/tests/ffi_test.rs

@@ -26,16 +26,40 @@ fn maintenance_rejects_invalid_arguments_and_resets_outputs() {
     let mut len = 99;
     // SAFETY: 输出均可写；无效输入应在任何读取之前被拒绝。
     unsafe {
-        assert_eq!(chusql_storage_maintenance(ptr::null(), ptr::null(), 0, &mut out, &mut len), -1);
+        assert_eq!(
+            chusql_storage_maintenance(ptr::null(), ptr::null(), 0, &mut out, &mut len),
+            -1
+        );
         assert!(out.is_null());
         assert_eq!(len, 0);
         len = 99;
-        assert_eq!(chusql_storage_maintenance(ptr::null(), input.as_ptr(), input.len(), ptr::null_mut(), &mut len), -1);
+        assert_eq!(
+            chusql_storage_maintenance(
+                ptr::null(),
+                input.as_ptr(),
+                input.len(),
+                ptr::null_mut(),
+                &mut len
+            ),
+            -1
+        );
         assert_eq!(len, 0);
         out = input.as_ptr() as *mut u8;
-        assert_eq!(chusql_storage_maintenance(ptr::null(), input.as_ptr(), input.len(), &mut out, ptr::null_mut()), -1);
+        assert_eq!(
+            chusql_storage_maintenance(
+                ptr::null(),
+                input.as_ptr(),
+                input.len(),
+                &mut out,
+                ptr::null_mut()
+            ),
+            -1
+        );
         assert!(out.is_null());
-        assert_eq!(chusql_storage_maintenance(ptr::null(), input.as_ptr(), usize::MAX, &mut out, &mut len), -1);
+        assert_eq!(
+            chusql_storage_maintenance(ptr::null(), input.as_ptr(), usize::MAX, &mut out, &mut len),
+            -1
+        );
     }
     assert!(out.is_null());
     assert_eq!(len, 0);
@@ -47,20 +71,36 @@ fn maintenance_rejects_invalid_arguments_and_resets_outputs() {
 fn request_validates_input_and_returns_owned_response() -> Result<(), Box<dyn std::error::Error>> {
     let temp = tempfile::tempdir()?;
     let config = temp.path().join("settings.toml");
-    std::fs::write(&config, format!("[storage]\ndata_dir = '{}'\nlog_files = '{}'\n[log]\nlevel = 'off'\n", temp.path().join("data").display(), temp.path().join("logs").display()))?;
+    std::fs::write(
+        &config,
+        format!(
+            "[storage]\ndata_dir = '{}'\nlog_files = '{}'\n[log]\nlevel = 'off'\n",
+            temp.path().join("data").display(),
+            temp.path().join("logs").display()
+        ),
+    )?;
     let storage = Storage::open(config.to_str())?;
     let input = br#"{"method":"ping"}"#;
     let mut out = ptr::null_mut();
     let mut len = 0;
     // SAFETY: 句柄和实际请求有效；超长长度必须在构造切片前被拒绝。
     unsafe {
-        assert_eq!(chusql_storage_request(&storage, input.as_ptr(), usize::MAX, &mut out, &mut len), -1);
+        assert_eq!(
+            chusql_storage_request(&storage, input.as_ptr(), usize::MAX, &mut out, &mut len),
+            -1
+        );
         assert!(out.is_null());
         assert_eq!(len, 0);
         assert_eq!(last_error(), "invalid argument");
-        assert_eq!(chusql_storage_request(&storage, [0xff].as_ptr(), 1, &mut out, &mut len), -1);
+        assert_eq!(
+            chusql_storage_request(&storage, [0xff].as_ptr(), 1, &mut out, &mut len),
+            -1
+        );
         assert!(last_error().starts_with("request is not valid UTF-8:"));
-        assert_eq!(chusql_storage_request(&storage, input.as_ptr(), input.len(), &mut out, &mut len), 0);
+        assert_eq!(
+            chusql_storage_request(&storage, input.as_ptr(), input.len(), &mut out, &mut len),
+            0
+        );
         assert!(!out.is_null());
         let response = slice::from_raw_parts(out, len).to_vec();
         chusql_storage_free(out, len);
@@ -71,7 +111,10 @@ fn request_validates_input_and_returns_owned_response() -> Result<(), Box<dyn st
     let config = CString::new(config.to_str().unwrap())?;
     // SAFETY: 路径与输出有效；失败不产生需要释放的缓冲。
     unsafe {
-        assert_eq!(chusql_storage_maintenance(config.as_ptr(), [0xff].as_ptr(), 1, &mut out, &mut len), -1);
+        assert_eq!(
+            chusql_storage_maintenance(config.as_ptr(), [0xff].as_ptr(), 1, &mut out, &mut len),
+            -1
+        );
     }
     assert!(out.is_null());
     assert_eq!(len, 0);
@@ -79,7 +122,18 @@ fn request_validates_input_and_returns_owned_response() -> Result<(), Box<dyn st
     let maintenance = br#"{"mode":"reset","user":"root","password_hash":"hash","types":[{"name":"int","base_type":"int","parameterized":false}]}"#;
     // SAFETY: 维护仅使用本测试临时目录；成功响应复制后由配套函数释放。
     unsafe {
-        assert_eq!(chusql_storage_maintenance(config.as_ptr(), maintenance.as_ptr(), maintenance.len(), &mut out, &mut len), 0, "{}", last_error());
+        assert_eq!(
+            chusql_storage_maintenance(
+                config.as_ptr(),
+                maintenance.as_ptr(),
+                maintenance.len(),
+                &mut out,
+                &mut len
+            ),
+            0,
+            "{}",
+            last_error()
+        );
         assert!(!out.is_null());
         let response = slice::from_raw_parts(out, len).to_vec();
         chusql_storage_free(out, len);