rigs completed

internal/adif/parser.go

@@ -25,6 +25,21 @@ type Record map[string]string
 // Returning a non-nil error from fn stops parsing and is propagated.
 // The header (text before <EOH>) is silently discarded.
 func Parse(r io.Reader, fn func(Record) error) error {
+	return parseWith(r, nil, fn)
+}
+
+// ParseWithDecoder is like Parse but applies decodeValue to each field's
+// raw bytes before storing as a string. ADIF field lengths are byte
+// counts in the file's native encoding, so decoding MUST happen after
+// reading exactly N bytes — wrapping the reader in a decoder would shift
+// byte boundaries and chop multibyte chars in half (e.g. "<QTH:7>YAOUNDÉ"
+// in Windows-1252 is 7 bytes; after upfront decoding it'd be 8 bytes of
+// UTF-8 and the parser would only read the first 7, splitting É).
+func ParseWithDecoder(r io.Reader, decodeValue func([]byte) string, fn func(Record) error) error {
+	return parseWith(r, decodeValue, fn)
+}
+
+func parseWith(r io.Reader, decodeValue func([]byte) string, fn func(Record) error) error {
 	br := bufio.NewReaderSize(r, 64*1024)
 
 	rec := Record{}
@@ -69,7 +84,11 @@ func Parse(r io.Reader, fn func(Record) error) error {
 				return fmt.Errorf("read field %s: %w", name, err)
 			}
 			if headerDone && name != "" {
-				rec[name] = string(val)
+				if decodeValue != nil {
+					rec[name] = decodeValue(val)
+				} else {
+					rec[name] = string(val)
+				}
 			}
 		}
 	}