Reduce string allocations by using a writer pattern

src/reg/registry/a2l_reader.rs

@@ -0,0 +1,37 @@
+//-----------------------------------------------------------------------------
+// Module a2l_reader
+// Simplified A2L reader for integration testing
+// Uses a2lfile crate to load A2L file
+
+#![allow(dead_code)]
+
+#[allow(unused_imports)]
+use log::{debug, error, info, trace, warn};
+
+use a2lfile::A2lError;
+
+pub fn a2l_load(filename: &str) -> Result<a2lfile::A2lFile, a2lfile::A2lError> {
+    trace!("Load A2L file {}", filename);
+    let input_filename = &std::ffi::OsString::from(filename);
+    let mut logmsgs = Vec::<A2lError>::new();
+    let res = a2lfile::load(input_filename, None, &mut logmsgs, true);
+    for log_msg in logmsgs {
+        warn!("A2l Loader: {}", log_msg);
+    }
+    match res {
+        Ok(a2l_file) => {
+            // Perform a consistency check
+            let mut logmsgs = Vec::<String>::new();
+            a2l_file.check(&mut logmsgs);
+            for log_msg in logmsgs {
+                warn!("A2l Checker: {}", log_msg);
+            }
+            Ok(a2l_file)
+        }
+
+        Err(e) => {
+            error!("a2lfile::load failed: {:?}", e);
+            Err(e)
+        }
+    }
+}