-pub fn encoding_from_hints(encoding: Option<&str>, codepage: Option<u32>) -> Option<&str> {
- if encoding.is_some() {
+use thiserror::Error as ThisError;
+
+#[derive(ThisError, Debug)]
+pub enum Error {
+ #[error("This system file does not indicate its own character encoding. For best results, specify an encoding explicitly. Use SYSFILE INFO with ENCODING=\"DETECT\" to analyze the possible encodings.")]
+ NoEncoding,
+
+ #[error("This system file encodes text strings with unknown code page {0}.")]
+ UnknownCodepage(i32),
+
+ #[error("This system file encodes text strings with unknown encoding {0}.")]
+ UnknownEncoding(String),
+
+ #[error("This system file is encoded in EBCDIC, which is not supported.")]
+ Ebcdic,
+}
+
+pub fn default_encoding() -> &'static Encoding {
+ lazy_static! {
+ static ref DEFAULT_ENCODING: &'static Encoding =
+ Encoding::for_label(locale_charset().as_bytes()).unwrap_or(&UTF_8);
+ }
+ &DEFAULT_ENCODING
+}
+
+pub fn get_encoding(
+ encoding: Option<&str>,
+ character_code: Option<i32>,
+) -> Result<&'static Encoding, Error> {
+ let label = if let Some(encoding) = encoding {