diff --git a/crates/encoding/src/lib.rs b/crates/encoding/src/lib.rs
index bb8188c..fc32392 100644
--- a/crates/encoding/src/lib.rs
+++ b/crates/encoding/src/lib.rs
@@ -1,6 +1,7 @@
-//! WHATWG Encoding Standard — UTF-8 and UTF-16 codecs, pure Rust.
+//! WHATWG Encoding Standard — UTF-8, UTF-16, and legacy single-byte codecs, pure Rust.
 
 pub mod error;
+mod single_byte;
 mod utf16;
 mod utf8;
 
@@ -17,6 +18,35 @@ pub enum Encoding {
     Utf8,
     Utf16Be,
     Utf16Le,
+    // Single-byte encodings
+    Ibm866,
+    Iso8859_2,
+    Iso8859_3,
+    Iso8859_4,
+    Iso8859_5,
+    Iso8859_6,
+    Iso8859_7,
+    Iso8859_8,
+    Iso8859_8I,
+    Iso8859_10,
+    Iso8859_13,
+    Iso8859_14,
+    Iso8859_15,
+    Iso8859_16,
+    Koi8R,
+    Koi8U,
+    Macintosh,
+    Windows874,
+    Windows1250,
+    Windows1251,
+    Windows1252,
+    Windows1253,
+    Windows1254,
+    Windows1255,
+    Windows1256,
+    Windows1257,
+    Windows1258,
+    XMacCyrillic,
 }
 
 impl Encoding {
@@ -26,6 +56,34 @@ impl Encoding {
             Self::Utf8 => "UTF-8",
             Self::Utf16Be => "UTF-16BE",
             Self::Utf16Le => "UTF-16LE",
+            Self::Ibm866 => "IBM866",
+            Self::Iso8859_2 => "ISO-8859-2",
+            Self::Iso8859_3 => "ISO-8859-3",
+            Self::Iso8859_4 => "ISO-8859-4",
+            Self::Iso8859_5 => "ISO-8859-5",
+            Self::Iso8859_6 => "ISO-8859-6",
+            Self::Iso8859_7 => "ISO-8859-7",
+            Self::Iso8859_8 => "ISO-8859-8",
+            Self::Iso8859_8I => "ISO-8859-8-I",
+            Self::Iso8859_10 => "ISO-8859-10",
+            Self::Iso8859_13 => "ISO-8859-13",
+            Self::Iso8859_14 => "ISO-8859-14",
+            Self::Iso8859_15 => "ISO-8859-15",
+            Self::Iso8859_16 => "ISO-8859-16",
+            Self::Koi8R => "KOI8-R",
+            Self::Koi8U => "KOI8-U",
+            Self::Macintosh => "macintosh",
+            Self::Windows874 => "windows-874",
+            Self::Windows1250 => "windows-1250",
+            Self::Windows1251 => "windows-1251",
+            Self::Windows1252 => "windows-1252",
+            Self::Windows1253 => "windows-1253",
+            Self::Windows1254 => "windows-1254",
+            Self::Windows1255 => "windows-1255",
+            Self::Windows1256 => "windows-1256",
+            Self::Windows1257 => "windows-1257",
+            Self::Windows1258 => "windows-1258",
+            Self::XMacCyrillic => "x-mac-cyrillic",
         }
     }
 }
@@ -55,6 +113,202 @@ const ENCODING_LABELS: &[(&str, Encoding)] = &[
     ("unicodefeff", Encoding::Utf16Le),
     ("utf-16", Encoding::Utf16Le),
     ("utf-16le", Encoding::Utf16Le),
+    // IBM866 labels
+    ("866", Encoding::Ibm866),
+    ("cp866", Encoding::Ibm866),
+    ("csibm866", Encoding::Ibm866),
+    ("ibm866", Encoding::Ibm866),
+    // ISO-8859-2 labels
+    ("csisolatin2", Encoding::Iso8859_2),
+    ("iso-8859-2", Encoding::Iso8859_2),
+    ("iso-ir-101", Encoding::Iso8859_2),
+    ("iso8859-2", Encoding::Iso8859_2),
+    ("iso88592", Encoding::Iso8859_2),
+    ("iso_8859-2", Encoding::Iso8859_2),
+    ("iso_8859-2:1987", Encoding::Iso8859_2),
+    ("l2", Encoding::Iso8859_2),
+    ("latin2", Encoding::Iso8859_2),
+    // ISO-8859-3 labels
+    ("csisolatin3", Encoding::Iso8859_3),
+    ("iso-8859-3", Encoding::Iso8859_3),
+    ("iso-ir-109", Encoding::Iso8859_3),
+    ("iso8859-3", Encoding::Iso8859_3),
+    ("iso88593", Encoding::Iso8859_3),
+    ("iso_8859-3", Encoding::Iso8859_3),
+    ("iso_8859-3:1988", Encoding::Iso8859_3),
+    ("l3", Encoding::Iso8859_3),
+    ("latin3", Encoding::Iso8859_3),
+    // ISO-8859-4 labels
+    ("csisolatin4", Encoding::Iso8859_4),
+    ("iso-8859-4", Encoding::Iso8859_4),
+    ("iso-ir-110", Encoding::Iso8859_4),
+    ("iso8859-4", Encoding::Iso8859_4),
+    ("iso88594", Encoding::Iso8859_4),
+    ("iso_8859-4", Encoding::Iso8859_4),
+    ("iso_8859-4:1988", Encoding::Iso8859_4),
+    ("l4", Encoding::Iso8859_4),
+    ("latin4", Encoding::Iso8859_4),
+    // ISO-8859-5 labels
+    ("csisolatincyrillic", Encoding::Iso8859_5),
+    ("cyrillic", Encoding::Iso8859_5),
+    ("iso-8859-5", Encoding::Iso8859_5),
+    ("iso-ir-144", Encoding::Iso8859_5),
+    ("iso8859-5", Encoding::Iso8859_5),
+    ("iso88595", Encoding::Iso8859_5),
+    ("iso_8859-5", Encoding::Iso8859_5),
+    ("iso_8859-5:1988", Encoding::Iso8859_5),
+    // ISO-8859-6 labels
+    ("arabic", Encoding::Iso8859_6),
+    ("asmo-708", Encoding::Iso8859_6),
+    ("csiso88596e", Encoding::Iso8859_6),
+    ("csiso88596i", Encoding::Iso8859_6),
+    ("csisolatinarabic", Encoding::Iso8859_6),
+    ("ecma-114", Encoding::Iso8859_6),
+    ("iso-8859-6", Encoding::Iso8859_6),
+    ("iso-8859-6-e", Encoding::Iso8859_6),
+    ("iso-8859-6-i", Encoding::Iso8859_6),
+    ("iso-ir-127", Encoding::Iso8859_6),
+    ("iso8859-6", Encoding::Iso8859_6),
+    ("iso88596", Encoding::Iso8859_6),
+    ("iso_8859-6", Encoding::Iso8859_6),
+    ("iso_8859-6:1987", Encoding::Iso8859_6),
+    // ISO-8859-7 labels
+    ("csisolatingreek", Encoding::Iso8859_7),
+    ("ecma-118", Encoding::Iso8859_7),
+    ("elot_928", Encoding::Iso8859_7),
+    ("greek", Encoding::Iso8859_7),
+    ("greek8", Encoding::Iso8859_7),
+    ("iso-8859-7", Encoding::Iso8859_7),
+    ("iso-ir-126", Encoding::Iso8859_7),
+    ("iso8859-7", Encoding::Iso8859_7),
+    ("iso88597", Encoding::Iso8859_7),
+    ("iso_8859-7", Encoding::Iso8859_7),
+    ("iso_8859-7:1987", Encoding::Iso8859_7),
+    ("sun_eu_greek", Encoding::Iso8859_7),
+    // ISO-8859-8 labels
+    ("csiso88598e", Encoding::Iso8859_8),
+    ("csisolatinhebrew", Encoding::Iso8859_8),
+    ("hebrew", Encoding::Iso8859_8),
+    ("iso-8859-8", Encoding::Iso8859_8),
+    ("iso-8859-8-e", Encoding::Iso8859_8),
+    ("iso-ir-138", Encoding::Iso8859_8),
+    ("iso8859-8", Encoding::Iso8859_8),
+    ("iso88598", Encoding::Iso8859_8),
+    ("iso_8859-8", Encoding::Iso8859_8),
+    ("iso_8859-8:1988", Encoding::Iso8859_8),
+    ("visual", Encoding::Iso8859_8),
+    // ISO-8859-8-I labels
+    ("csiso88598i", Encoding::Iso8859_8I),
+    ("iso-8859-8-i", Encoding::Iso8859_8I),
+    ("logical", Encoding::Iso8859_8I),
+    // ISO-8859-10 labels
+    ("csisolatin6", Encoding::Iso8859_10),
+    ("iso-8859-10", Encoding::Iso8859_10),
+    ("iso-ir-157", Encoding::Iso8859_10),
+    ("iso8859-10", Encoding::Iso8859_10),
+    ("iso885910", Encoding::Iso8859_10),
+    ("l6", Encoding::Iso8859_10),
+    ("latin6", Encoding::Iso8859_10),
+    // ISO-8859-13 labels
+    ("iso-8859-13", Encoding::Iso8859_13),
+    ("iso8859-13", Encoding::Iso8859_13),
+    ("iso885913", Encoding::Iso8859_13),
+    // ISO-8859-14 labels
+    ("iso-8859-14", Encoding::Iso8859_14),
+    ("iso8859-14", Encoding::Iso8859_14),
+    ("iso885914", Encoding::Iso8859_14),
+    // ISO-8859-15 labels
+    ("csisolatin9", Encoding::Iso8859_15),
+    ("iso-8859-15", Encoding::Iso8859_15),
+    ("iso8859-15", Encoding::Iso8859_15),
+    ("iso885915", Encoding::Iso8859_15),
+    ("iso_8859-15", Encoding::Iso8859_15),
+    ("l9", Encoding::Iso8859_15),
+    // ISO-8859-16 labels
+    ("iso-8859-16", Encoding::Iso8859_16),
+    // KOI8-R labels
+    ("cskoi8r", Encoding::Koi8R),
+    ("koi", Encoding::Koi8R),
+    ("koi8", Encoding::Koi8R),
+    ("koi8-r", Encoding::Koi8R),
+    ("koi8_r", Encoding::Koi8R),
+    // KOI8-U labels
+    ("koi8-ru", Encoding::Koi8U),
+    ("koi8-u", Encoding::Koi8U),
+    // macintosh labels
+    ("csmacintosh", Encoding::Macintosh),
+    ("mac", Encoding::Macintosh),
+    ("macintosh", Encoding::Macintosh),
+    ("x-mac-roman", Encoding::Macintosh),
+    // windows-874 labels
+    ("dos-874", Encoding::Windows874),
+    ("iso-8859-11", Encoding::Windows874),
+    ("iso8859-11", Encoding::Windows874),
+    ("iso885911", Encoding::Windows874),
+    ("tis-620", Encoding::Windows874),
+    ("windows-874", Encoding::Windows874),
+    // windows-1250 labels
+    ("cp1250", Encoding::Windows1250),
+    ("windows-1250", Encoding::Windows1250),
+    ("x-cp1250", Encoding::Windows1250),
+    // windows-1251 labels
+    ("cp1251", Encoding::Windows1251),
+    ("windows-1251", Encoding::Windows1251),
+    ("x-cp1251", Encoding::Windows1251),
+    // windows-1252 labels (also serves as ISO-8859-1 and US-ASCII per WHATWG)
+    ("ansi_x3.4-1968", Encoding::Windows1252),
+    ("ascii", Encoding::Windows1252),
+    ("cp1252", Encoding::Windows1252),
+    ("cp819", Encoding::Windows1252),
+    ("csisolatin1", Encoding::Windows1252),
+    ("ibm819", Encoding::Windows1252),
+    ("iso-8859-1", Encoding::Windows1252),
+    ("iso-ir-100", Encoding::Windows1252),
+    ("iso8859-1", Encoding::Windows1252),
+    ("iso88591", Encoding::Windows1252),
+    ("iso_8859-1", Encoding::Windows1252),
+    ("iso_8859-1:1987", Encoding::Windows1252),
+    ("l1", Encoding::Windows1252),
+    ("latin1", Encoding::Windows1252),
+    ("us-ascii", Encoding::Windows1252),
+    ("windows-1252", Encoding::Windows1252),
+    ("x-cp1252", Encoding::Windows1252),
+    // windows-1253 labels
+    ("cp1253", Encoding::Windows1253),
+    ("windows-1253", Encoding::Windows1253),
+    ("x-cp1253", Encoding::Windows1253),
+    // windows-1254 labels
+    ("cp1254", Encoding::Windows1254),
+    ("csisolatin5", Encoding::Windows1254),
+    ("iso-8859-9", Encoding::Windows1254),
+    ("iso-ir-148", Encoding::Windows1254),
+    ("iso8859-9", Encoding::Windows1254),
+    ("iso88599", Encoding::Windows1254),
+    ("iso_8859-9", Encoding::Windows1254),
+    ("iso_8859-9:1989", Encoding::Windows1254),
+    ("l5", Encoding::Windows1254),
+    ("latin5", Encoding::Windows1254),
+    ("windows-1254", Encoding::Windows1254),
+    ("x-cp1254", Encoding::Windows1254),
+    // windows-1255 labels
+    ("cp1255", Encoding::Windows1255),
+    ("windows-1255", Encoding::Windows1255),
+    ("x-cp1255", Encoding::Windows1255),
+    // windows-1256 labels
+    ("cp1256", Encoding::Windows1256),
+    ("windows-1256", Encoding::Windows1256),
+    ("x-cp1256", Encoding::Windows1256),
+    // windows-1257 labels
+    ("cp1257", Encoding::Windows1257),
+    ("windows-1257", Encoding::Windows1257),
+    ("x-cp1257", Encoding::Windows1257),
+    // windows-1258 labels
+    ("cp1258", Encoding::Windows1258),
+    ("windows-1258", Encoding::Windows1258),
+    ("x-cp1258", Encoding::Windows1258),
+    // x-mac-cyrillic labels
+    ("x-mac-cyrillic", Encoding::XMacCyrillic),
+    ("x-mac-ukrainian", Encoding::XMacCyrillic),
 ];
 
 /// Look up an encoding by its WHATWG label.
@@ -102,6 +356,11 @@ pub fn decode(bytes: &[u8], encoding: Encoding) -> String {
         Encoding::Utf8 => utf8::decode_utf8(bytes, ErrorMode::Replacement).unwrap(),
         Encoding::Utf16Le => utf16::decode_utf16le(bytes, ErrorMode::Replacement).unwrap(),
         Encoding::Utf16Be => utf16::decode_utf16be(bytes, ErrorMode::Replacement).unwrap(),
+        enc => {
+            let table = single_byte::table_for(&enc).unwrap();
+            single_byte::decode_single_byte(bytes, table, enc.name(), ErrorMode::Replacement)
+                .unwrap()
+        }
     }
 }
 
@@ -113,21 +372,22 @@ pub fn decode_strict(bytes: &[u8], encoding: Encoding) -> Result<String> {
         Encoding::Utf8 => utf8::decode_utf8(bytes, ErrorMode::Fatal),
         Encoding::Utf16Le => utf16::decode_utf16le(bytes, ErrorMode::Fatal),
         Encoding::Utf16Be => utf16::decode_utf16be(bytes, ErrorMode::Fatal),
+        enc => {
+            let table = single_byte::table_for(&enc).unwrap();
+            single_byte::decode_single_byte(bytes, table, enc.name(), ErrorMode::Fatal)
+        }
     }
 }
 
 /// Encode a string to bytes using the given encoding.
 ///
-/// Only UTF-8 encoding is supported for encode. Per WHATWG spec, UTF-16
+/// Only UTF-8 encoding is supported for encode. Per WHATWG spec, all other
 /// encodings are decode-only.
 pub fn encode(text: &str, encoding: Encoding) -> Result<Vec<u8>> {
     match encoding {
         Encoding::Utf8 => Ok(utf8::encode_utf8(text)),
-        Encoding::Utf16Be => Err(EncodingError::EncodeNotSupported {
-            encoding: "UTF-16BE",
-        }),
-        Encoding::Utf16Le => Err(EncodingError::EncodeNotSupported {
-            encoding: "UTF-16LE",
+        other => Err(EncodingError::EncodeNotSupported {
+            encoding: other.name(),
         }),
     }
 }
@@ -177,6 +437,10 @@ mod tests {
         assert_eq!(Encoding::Utf8.name(), "UTF-8");
         assert_eq!(Encoding::Utf16Be.name(), "UTF-16BE");
         assert_eq!(Encoding::Utf16Le.name(), "UTF-16LE");
+        assert_eq!(Encoding::Windows1252.name(), "windows-1252");
+        assert_eq!(Encoding::Iso8859_2.name(), "ISO-8859-2");
+        assert_eq!(Encoding::Koi8R.name(), "KOI8-R");
+        assert_eq!(Encoding::Macintosh.name(), "macintosh");
     }
 
     // -- Label lookup --
@@ -203,19 +467,54 @@ mod tests {
         assert_eq!(lookup("iso-10646-ucs-2"), Some(Encoding::Utf16Le));
     }
 
+    #[test]
+    fn lookup_windows_1252_labels() {
+        // windows-1252 is THE most important single-byte encoding
+        assert_eq!(lookup("windows-1252"), Some(Encoding::Windows1252));
+        assert_eq!(lookup("cp1252"), Some(Encoding::Windows1252));
+        assert_eq!(lookup("x-cp1252"), Some(Encoding::Windows1252));
+        // ISO-8859-1 maps to windows-1252 per WHATWG
+        assert_eq!(lookup("iso-8859-1"), Some(Encoding::Windows1252));
+        assert_eq!(lookup("latin1"), Some(Encoding::Windows1252));
+        assert_eq!(lookup("l1"), Some(Encoding::Windows1252));
+        // US-ASCII maps to windows-1252 per WHATWG
+        assert_eq!(lookup("us-ascii"), Some(Encoding::Windows1252));
+        assert_eq!(lookup("ascii"), Some(Encoding::Windows1252));
+    }
+
+    #[test]
+    fn lookup_legacy_labels() {
+        assert_eq!(lookup("iso-8859-2"), Some(Encoding::Iso8859_2));
+        assert_eq!(lookup("latin2"), Some(Encoding::Iso8859_2));
+        assert_eq!(lookup("iso-8859-5"), Some(Encoding::Iso8859_5));
+        assert_eq!(lookup("cyrillic"), Some(Encoding::Iso8859_5));
+        assert_eq!(lookup("iso-8859-7"), Some(Encoding::Iso8859_7));
+        assert_eq!(lookup("greek"), Some(Encoding::Iso8859_7));
+        assert_eq!(lookup("iso-8859-15"), Some(Encoding::Iso8859_15));
+        assert_eq!(lookup("koi8-r"), Some(Encoding::Koi8R));
+        assert_eq!(lookup("koi8-u"), Some(Encoding::Koi8U));
+        assert_eq!(lookup("macintosh"), Some(Encoding::Macintosh));
+        assert_eq!(lookup("ibm866"), Some(Encoding::Ibm866));
+        assert_eq!(lookup("windows-1251"), Some(Encoding::Windows1251));
+        assert_eq!(lookup("windows-874"), Some(Encoding::Windows874));
+        assert_eq!(lookup("iso-8859-9"), Some(Encoding::Windows1254));
+        assert_eq!(lookup("x-mac-cyrillic"), Some(Encoding::XMacCyrillic));
+    }
+
     #[test]
     fn lookup_with_whitespace() {
         assert_eq!(lookup("  utf-8  "), Some(Encoding::Utf8));
         assert_eq!(lookup("\tutf-8\n"), Some(Encoding::Utf8));
         assert_eq!(lookup("\r\nutf-16le\r\n"), Some(Encoding::Utf16Le));
+        assert_eq!(lookup("  windows-1252  "), Some(Encoding::Windows1252));
     }
 
     #[test]
     fn lookup_unknown() {
-        assert_eq!(lookup("latin1"), None);
         assert_eq!(lookup(""), None);
         assert_eq!(lookup("   "), None);
         assert_eq!(lookup("utf-99"), None);
+        assert_eq!(lookup("bogus-encoding"), None);
     }
 
     // -- BOM sniffing --
@@ -285,6 +584,41 @@ mod tests {
         assert_eq!(decode(&[0x00, 0x41], Encoding::Utf16Be), "A");
     }
 
+    #[test]
+    fn decode_windows_1252_euro() {
+        assert_eq!(decode(&[0x80], Encoding::Windows1252), "\u{20AC}");
+    }
+
+    #[test]
+    fn decode_windows_1252_cafe() {
+        // "Café" in windows-1252
+        assert_eq!(
+            decode(&[0x43, 0x61, 0x66, 0xE9], Encoding::Windows1252),
+            "Caf\u{00E9}"
+        );
+    }
+
+    #[test]
+    fn decode_iso_8859_2() {
+        // 0xA1 → Ą
+        assert_eq!(decode(&[0xA1], Encoding::Iso8859_2), "\u{0104}");
+    }
+
+    #[test]
+    fn decode_koi8r_cyrillic() {
+        // 0xE1 → А (U+0410)
+        assert_eq!(decode(&[0xE1], Encoding::Koi8R), "\u{0410}");
+    }
+
+    #[test]
+    fn decode_windows_1251_cyrillic() {
+        // 0xC0 → А (U+0410), 0xE0 → а (U+0430)
+        assert_eq!(
+            decode(&[0xC0, 0xE0], Encoding::Windows1251),
+            "\u{0410}\u{0430}"
+        );
+    }
+
     // -- Top-level decode_strict --
 
     #[test]
@@ -297,6 +631,20 @@ mod tests {
         assert!(decode_strict(&[0xFF], Encoding::Utf8).is_err());
     }
 
+    #[test]
+    fn decode_strict_single_byte_unmapped() {
+        // ISO-8859-3 byte 0xA5 is unmapped
+        assert!(decode_strict(&[0xA5], Encoding::Iso8859_3).is_err());
+    }
+
+    #[test]
+    fn decode_strict_single_byte_valid() {
+        assert_eq!(
+            decode_strict(&[0x80], Encoding::Windows1252).unwrap(),
+            "\u{20AC}"
+        );
+    }
+
     // -- Top-level encode --
 
     #[test]
@@ -305,18 +653,18 @@ mod tests {
     }
 
     #[test]
-    fn encode_utf16_not_supported() {
+    fn encode_non_utf8_not_supported() {
         assert!(matches!(
             encode("Hello", Encoding::Utf16Le),
-            Err(EncodingError::EncodeNotSupported {
-                encoding: "UTF-16LE"
-            })
+            Err(EncodingError::EncodeNotSupported { .. })
         ));
         assert!(matches!(
             encode("Hello", Encoding::Utf16Be),
-            Err(EncodingError::EncodeNotSupported {
-                encoding: "UTF-16BE"
-            })
+            Err(EncodingError::EncodeNotSupported { .. })
+        ));
+        assert!(matches!(
+            encode("Hello", Encoding::Windows1252),
+            Err(EncodingError::EncodeNotSupported { .. })
         ));
     }
 
diff --git a/crates/encoding/src/single_byte.rs b/crates/encoding/src/single_byte.rs
new file mode 100644
index 0000000..839e166
--- /dev/null
+++ b/crates/encoding/src/single_byte.rs
@@ -0,0 +1,858 @@
+//! Single-byte encoding decoders per WHATWG Encoding Standard §14.1.
+//!
+//! Each single-byte encoding maps bytes 0x00–0x7F to ASCII and
+//! bytes 0x80–0xFF via a 128-entry lookup table to Unicode codepoints.
+
+use crate::error::{EncodingError, Result};
+use crate::utf8::ErrorMode;
+
+/// Decode bytes using a single-byte encoding lookup table.
+///
+/// Bytes 0x00–0x7F are ASCII. Bytes 0x80–0xFF are looked up in `table`.
+/// Table entries of `0xFFFD` indicate unmapped bytes.
+pub(crate) fn decode_single_byte(
+    bytes: &[u8],
+    table: &[u16; 128],
+    encoding_name: &'static str,
+    mode: ErrorMode,
+) -> Result<String> {
+    let mut output = String::with_capacity(bytes.len());
+    for (i, &byte) in bytes.iter().enumerate() {
+        if byte < 0x80 {
+            output.push(byte as char);
+        } else {
+            let cp = table[(byte - 0x80) as usize];
+            if cp == 0xFFFD {
+                if mode == ErrorMode::Fatal {
+                    return Err(EncodingError::InvalidSequence {
+                        encoding: encoding_name,
+                        position: i,
+                    });
+                }
+                output.push('\u{FFFD}');
+            } else {
+                output.push(char::from_u32(cp as u32).unwrap_or('\u{FFFD}'));
+            }
+        }
+    }
+    Ok(output)
+}
+
+// ---------------------------------------------------------------------------
+// WHATWG single-byte encoding index tables
+// Each table maps bytes 0x80–0xFF (index 0–127) to Unicode codepoints.
+// 0xFFFD = unmapped byte position.
+// ---------------------------------------------------------------------------
+
+/// windows-1252 (WHATWG index)
+/// Also serves as the encoding for labels: iso-8859-1, us-ascii, latin1, etc.
+pub(crate) const WINDOWS_1252: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0x0081, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0x0160, 0x2039,
+    0x0152, 0x008D, 0x017D, 0x008F, // 0x90–0x9F
+    0x0090, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x02DC, 0x2122, 0x0161, 0x203A,
+    0x0153, 0x009D, 0x017E, 0x0178, // 0xA0–0xAF
+    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00AA, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00BA, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00BF, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0x00D0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7, 0x00D8, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x00DD, 0x00DE, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x00EC, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7, 0x00F8, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x00FD, 0x00FE, 0x00FF,
+];
+
+/// ISO-8859-2 (Latin-2, Central European)
+pub(crate) const ISO_8859_2: [u16; 128] = [
+    // 0x80–0x8F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, // 0x90–0x9F: C1 controls
+    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 0x0098, 0x0099, 0x009A, 0x009B,
+    0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0104, 0x02D8, 0x0141, 0x00A4, 0x013D, 0x015A, 0x00A7, 0x00A8, 0x0160, 0x015E, 0x0164,
+    0x0179, 0x00AD, 0x017D, 0x017B, // 0xB0–0xBF
+    0x00B0, 0x0105, 0x02DB, 0x0142, 0x00B4, 0x013E, 0x015B, 0x02C7, 0x00B8, 0x0161, 0x015F, 0x0165,
+    0x017A, 0x02DD, 0x017E, 0x017C, // 0xC0–0xCF
+    0x0154, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x0139, 0x0106, 0x00C7, 0x010C, 0x00C9, 0x0118, 0x00CB,
+    0x011A, 0x00CD, 0x00CE, 0x010E, // 0xD0–0xDF
+    0x0110, 0x0143, 0x0147, 0x00D3, 0x00D4, 0x0150, 0x00D6, 0x00D7, 0x0158, 0x016E, 0x00DA, 0x0170,
+    0x00DC, 0x00DD, 0x0162, 0x00DF, // 0xE0–0xEF
+    0x0155, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x013A, 0x0107, 0x00E7, 0x010D, 0x00E9, 0x0119, 0x00EB,
+    0x011B, 0x00ED, 0x00EE, 0x010F, // 0xF0–0xFF
+    0x0111, 0x0144, 0x0148, 0x00F3, 0x00F4, 0x0151, 0x00F6, 0x00F7, 0x0159, 0x016F, 0x00FA, 0x0171,
+    0x00FC, 0x00FD, 0x0163, 0x02D9,
+];
+
+/// ISO-8859-3 (Latin-3, South European)
+pub(crate) const ISO_8859_3: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0126, 0x02D8, 0x00A3, 0x00A4, 0xFFFD, 0x0124, 0x00A7, 0x00A8, 0x0130, 0x015E, 0x011E,
+    0x0134, 0x00AD, 0xFFFD, 0x017B, // 0xB0–0xBF
+    0x00B0, 0x0127, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x0125, 0x00B7, 0x00B8, 0x0131, 0x015F, 0x011F,
+    0x0135, 0x00BD, 0xFFFD, 0x017C, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0xFFFD, 0x00C4, 0x010A, 0x0108, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0xFFFD, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x0120, 0x00D6, 0x00D7, 0x011C, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x016C, 0x015C, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0xFFFD, 0x00E4, 0x010B, 0x0109, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x00EC, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0xFFFD, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x0121, 0x00F6, 0x00F7, 0x011D, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x016D, 0x015D, 0x02D9,
+];
+
+/// ISO-8859-4 (Latin-4, North European)
+pub(crate) const ISO_8859_4: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0104, 0x0138, 0x0156, 0x00A4, 0x0128, 0x013B, 0x00A7, 0x00A8, 0x0160, 0x0112, 0x0122,
+    0x0166, 0x00AD, 0x017D, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x0105, 0x02DB, 0x0157, 0x00B4, 0x0129, 0x013C, 0x02C7, 0x00B8, 0x0161, 0x0113, 0x0123,
+    0x0167, 0x014A, 0x017E, 0x014B, // 0xC0–0xCF
+    0x0100, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x012E, 0x010C, 0x00C9, 0x0118, 0x00CB,
+    0x0116, 0x00CD, 0x00CE, 0x012A, // 0xD0–0xDF
+    0x0110, 0x0145, 0x014C, 0x0136, 0x00D4, 0x00D5, 0x00D6, 0x00D7, 0x00D8, 0x0172, 0x00DA, 0x00DB,
+    0x00DC, 0x0168, 0x016A, 0x00DF, // 0xE0–0xEF
+    0x0101, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x012F, 0x010D, 0x00E9, 0x0119, 0x00EB,
+    0x0117, 0x00ED, 0x00EE, 0x012B, // 0xF0–0xFF
+    0x0111, 0x0146, 0x014D, 0x0137, 0x00F4, 0x00F5, 0x00F6, 0x00F7, 0x00F8, 0x0173, 0x00FA, 0x00FB,
+    0x00FC, 0x0169, 0x016B, 0x02D9,
+];
+
+/// ISO-8859-5 (Cyrillic)
+pub(crate) const ISO_8859_5: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 0x0408, 0x0409, 0x040A, 0x040B,
+    0x040C, 0x00AD, 0x040E, 0x040F, // 0xB0–0xBF
+    0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 0x0418, 0x0419, 0x041A, 0x041B,
+    0x041C, 0x041D, 0x041E, 0x041F, // 0xC0–0xCF
+    0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 0x0428, 0x0429, 0x042A, 0x042B,
+    0x042C, 0x042D, 0x042E, 0x042F, // 0xD0–0xDF
+    0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, 0x0438, 0x0439, 0x043A, 0x043B,
+    0x043C, 0x043D, 0x043E, 0x043F, // 0xE0–0xEF
+    0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, 0x0448, 0x0449, 0x044A, 0x044B,
+    0x044C, 0x044D, 0x044E, 0x044F, // 0xF0–0xFF
+    0x2116, 0x0451, 0x0452, 0x0453, 0x0454, 0x0455, 0x0456, 0x0457, 0x0458, 0x0459, 0x045A, 0x045B,
+    0x045C, 0x00A7, 0x045E, 0x045F,
+];
+
+/// ISO-8859-6 (Arabic)
+pub(crate) const ISO_8859_6: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0xFFFD, 0xFFFD, 0xFFFD, 0x00A4, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0x060C, 0x00AD, 0xFFFD, 0xFFFD, // 0xB0–0xBF
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0x061B,
+    0xFFFD, 0xFFFD, 0xFFFD, 0x061F, // 0xC0–0xCF
+    0xFFFD, 0x0621, 0x0622, 0x0623, 0x0624, 0x0625, 0x0626, 0x0627, 0x0628, 0x0629, 0x062A, 0x062B,
+    0x062C, 0x062D, 0x062E, 0x062F, // 0xD0–0xDF
+    0x0630, 0x0631, 0x0632, 0x0633, 0x0634, 0x0635, 0x0636, 0x0637, 0x0638, 0x0639, 0x063A, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xE0–0xEF
+    0x0640, 0x0641, 0x0642, 0x0643, 0x0644, 0x0645, 0x0646, 0x0647, 0x0648, 0x0649, 0x064A, 0x064B,
+    0x064C, 0x064D, 0x064E, 0x064F, // 0xF0–0xFF
+    0x0650, 0x0651, 0x0652, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+];
+
+/// ISO-8859-7 (Greek)
+pub(crate) const ISO_8859_7: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x2018, 0x2019, 0x00A3, 0x20AC, 0x20AF, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x037A, 0x00AB,
+    0x00AC, 0x00AD, 0xFFFD, 0x2015, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x0384, 0x0385, 0x0386, 0x00B7, 0x0388, 0x0389, 0x038A, 0x00BB,
+    0x038C, 0x00BD, 0x038E, 0x038F, // 0xC0–0xCF
+    0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 0x0398, 0x0399, 0x039A, 0x039B,
+    0x039C, 0x039D, 0x039E, 0x039F, // 0xD0–0xDF
+    0x03A0, 0x03A1, 0xFFFD, 0x03A3, 0x03A4, 0x03A5, 0x03A6, 0x03A7, 0x03A8, 0x03A9, 0x03AA, 0x03AB,
+    0x03AC, 0x03AD, 0x03AE, 0x03AF, // 0xE0–0xEF
+    0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7, 0x03B8, 0x03B9, 0x03BA, 0x03BB,
+    0x03BC, 0x03BD, 0x03BE, 0x03BF, // 0xF0–0xFF
+    0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7, 0x03C8, 0x03C9, 0x03CA, 0x03CB,
+    0x03CC, 0x03CD, 0x03CE, 0xFFFD,
+];
+
+/// ISO-8859-8 (Hebrew) — also used for ISO-8859-8-I (logical order)
+pub(crate) const ISO_8859_8: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0xFFFD, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00D7, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00F7, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0xFFFD, // 0xC0–0xCF
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xD0–0xDF
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0x2017, // 0xE0–0xEF
+    0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7, 0x05D8, 0x05D9, 0x05DA, 0x05DB,
+    0x05DC, 0x05DD, 0x05DE, 0x05DF, // 0xF0–0xFF
+    0x05E0, 0x05E1, 0x05E2, 0x05E3, 0x05E4, 0x05E5, 0x05E6, 0x05E7, 0x05E8, 0x05E9, 0x05EA, 0xFFFD,
+    0xFFFD, 0x200E, 0x200F, 0xFFFD,
+];
+
+/// ISO-8859-10 (Latin-6, Nordic)
+pub(crate) const ISO_8859_10: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0104, 0x0112, 0x0122, 0x012A, 0x0128, 0x0136, 0x00A7, 0x013B, 0x0110, 0x0160, 0x0166,
+    0x017D, 0x00AD, 0x016A, 0x014A, // 0xB0–0xBF
+    0x00B0, 0x0105, 0x0113, 0x0123, 0x012B, 0x0129, 0x0137, 0x00B7, 0x013C, 0x0111, 0x0161, 0x0167,
+    0x017E, 0x2015, 0x016B, 0x014B, // 0xC0–0xCF
+    0x0100, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x012E, 0x010C, 0x00C9, 0x0118, 0x00CB,
+    0x0116, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0x00D0, 0x0145, 0x014C, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x0168, 0x00D8, 0x0172, 0x00DA, 0x00DB,
+    0x00DC, 0x00DD, 0x00DE, 0x00DF, // 0xE0–0xEF
+    0x0101, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x012F, 0x010D, 0x00E9, 0x0119, 0x00EB,
+    0x0117, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x00F0, 0x0146, 0x014D, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x0169, 0x00F8, 0x0173, 0x00FA, 0x00FB,
+    0x00FC, 0x00FD, 0x00FE, 0x0138,
+];
+
+/// ISO-8859-13 (Latin-7, Baltic Rim)
+pub(crate) const ISO_8859_13: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x201D, 0x00A2, 0x00A3, 0x00A4, 0x201E, 0x00A6, 0x00A7, 0x00D8, 0x00A9, 0x0156, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00C6, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x201C, 0x00B5, 0x00B6, 0x00B7, 0x00F8, 0x00B9, 0x0157, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00E6, // 0xC0–0xCF
+    0x0104, 0x012E, 0x0100, 0x0106, 0x00C4, 0x00C5, 0x0118, 0x0112, 0x010C, 0x00C9, 0x0179, 0x0116,
+    0x0122, 0x0136, 0x012A, 0x013B, // 0xD0–0xDF
+    0x0160, 0x0143, 0x0145, 0x00D3, 0x014C, 0x00D5, 0x00D6, 0x00D7, 0x0172, 0x0141, 0x015A, 0x016A,
+    0x00DC, 0x017B, 0x017D, 0x00DF, // 0xE0–0xEF
+    0x0105, 0x012F, 0x0101, 0x0107, 0x00E4, 0x00E5, 0x0119, 0x0113, 0x010D, 0x00E9, 0x017A, 0x0117,
+    0x0123, 0x0137, 0x012B, 0x013C, // 0xF0–0xFF
+    0x0161, 0x0144, 0x0146, 0x00F3, 0x014D, 0x00F5, 0x00F6, 0x00F7, 0x0173, 0x0142, 0x015B, 0x016B,
+    0x00FC, 0x017C, 0x017E, 0x2019,
+];
+
+/// ISO-8859-14 (Latin-8, Celtic)
+pub(crate) const ISO_8859_14: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x1E02, 0x1E03, 0x00A3, 0x010A, 0x010B, 0x1E0A, 0x00A7, 0x1E80, 0x00A9, 0x1E82, 0x1E0B,
+    0x1EF2, 0x00AD, 0x00AE, 0x0178, // 0xB0–0xBF
+    0x1E1E, 0x1E1F, 0x0120, 0x0121, 0x1E40, 0x1E41, 0x00B6, 0x1E56, 0x1E81, 0x1E57, 0x1E83, 0x1E60,
+    0x1EF3, 0x1E84, 0x1E85, 0x1E61, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0x0174, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x1E6A, 0x00D8, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x00DD, 0x0176, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x00EC, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x0175, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x1E6B, 0x00F8, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x00FD, 0x0177, 0x00FF,
+];
+
+/// ISO-8859-15 (Latin-9, updated Western European)
+pub(crate) const ISO_8859_15: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
+    // 0xA0–0xAF: Differs from 8859-1 at A4, A6, A8, B4, B8, BC, BD, BE
+    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x20AC, 0x00A5, 0x0160, 0x00A7, 0x0161, 0x00A9, 0x00AA, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x017D, 0x00B5, 0x00B6, 0x00B7, 0x017E, 0x00B9, 0x00BA, 0x00BB,
+    0x0152, 0x0153, 0x0178, 0x00BF, // 0xC0–0xFF: same as ISO-8859-1
+    0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, 0x00D0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7,
+    0x00D8, 0x00D9, 0x00DA, 0x00DB, 0x00DC, 0x00DD, 0x00DE, 0x00DF, 0x00E0, 0x00E1, 0x00E2, 0x00E3,
+    0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB, 0x00EC, 0x00ED, 0x00EE, 0x00EF,
+    0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7, 0x00F8, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x00FD, 0x00FE, 0x00FF,
+];
+
+/// ISO-8859-16 (Latin-10, South-Eastern European)
+pub(crate) const ISO_8859_16: [u16; 128] = [
+    // 0x80–0x9F: C1 controls
+    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008A, 0x008B,
+    0x008C, 0x008D, 0x008E, 0x008F, 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+    0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F, // 0xA0–0xAF
+    0x00A0, 0x0104, 0x0105, 0x0141, 0x20AC, 0x201E, 0x0160, 0x00A7, 0x0161, 0x00A9, 0x0218, 0x00AB,
+    0x0179, 0x00AD, 0x017A, 0x017B, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x010C, 0x0142, 0x017D, 0x201D, 0x00B6, 0x00B7, 0x017E, 0x010D, 0x0219, 0x00BB,
+    0x0152, 0x0153, 0x0178, 0x017C, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x0106, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0x0110, 0x0143, 0x00D2, 0x00D3, 0x00D4, 0x0150, 0x00D6, 0x015A, 0x0170, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x0118, 0x021A, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x0107, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x00EC, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x0111, 0x0144, 0x00F2, 0x00F3, 0x00F4, 0x0151, 0x00F6, 0x015B, 0x0171, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x0119, 0x021B, 0x00FF,
+];
+
+/// KOI8-R (Russian)
+pub(crate) const KOI8_R: [u16; 128] = [
+    // 0x80–0x8F: box drawing
+    0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524, 0x252C, 0x2534, 0x253C, 0x2580,
+    0x2584, 0x2588, 0x258C, 0x2590, // 0x90–0x9F: more box drawing + block elements
+    0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248, 0x2264, 0x2265, 0x00A0, 0x2321,
+    0x00B0, 0x00B2, 0x00B7, 0x00F7, // 0xA0–0xAF
+    0x2550, 0x2551, 0x2552, 0x0451, 0x2553, 0x2554, 0x2555, 0x2556, 0x2557, 0x2558, 0x2559, 0x255A,
+    0x255B, 0x255C, 0x255D, 0x255E, // 0xB0–0xBF
+    0x255F, 0x2560, 0x2561, 0x0401, 0x2562, 0x2563, 0x2564, 0x2565, 0x2566, 0x2567, 0x2568, 0x2569,
+    0x256A, 0x256B, 0x256C, 0x00A9, // 0xC0–0xCF: Cyrillic lowercase
+    0x044E, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433, 0x0445, 0x0438, 0x0439, 0x043A,
+    0x043B, 0x043C, 0x043D, 0x043E, // 0xD0–0xDF
+    0x043F, 0x044F, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432, 0x044C, 0x044B, 0x0437, 0x0448,
+    0x044D, 0x0449, 0x0447, 0x044A, // 0xE0–0xEF: Cyrillic uppercase
+    0x042E, 0x0410, 0x0411, 0x0426, 0x0414, 0x0415, 0x0424, 0x0413, 0x0425, 0x0418, 0x0419, 0x041A,
+    0x041B, 0x041C, 0x041D, 0x041E, // 0xF0–0xFF
+    0x041F, 0x042F, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412, 0x042C, 0x042B, 0x0417, 0x0428,
+    0x042D, 0x0429, 0x0427, 0x042A,
+];
+
+/// KOI8-U (Ukrainian)
+pub(crate) const KOI8_U: [u16; 128] = [
+    // 0x80–0x8F: box drawing (same as KOI8-R)
+    0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524, 0x252C, 0x2534, 0x253C, 0x2580,
+    0x2584, 0x2588, 0x258C, 0x2590, // 0x90–0x9F
+    0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248, 0x2264, 0x2265, 0x00A0, 0x2321,
+    0x00B0, 0x00B2, 0x00B7, 0x00F7,
+    // 0xA0–0xAF: differs from KOI8-R at A3, A4, A6, A7
+    0x2550, 0x2551, 0x2552, 0x0451, 0x0454, 0x2554, 0x0456, 0x0457, 0x2557, 0x2558, 0x2559, 0x255A,
+    0x255B, 0x0491, 0x255D, 0x255E, // 0xB0–0xBF
+    0x255F, 0x2560, 0x2561, 0x0401, 0x0404, 0x2563, 0x0406, 0x0407, 0x2566, 0x2567, 0x2568, 0x2569,
+    0x256A, 0x0490, 0x256C, 0x00A9, // 0xC0–0xFF: Cyrillic (same as KOI8-R)
+    0x044E, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433, 0x0445, 0x0438, 0x0439, 0x043A,
+    0x043B, 0x043C, 0x043D, 0x043E, 0x043F, 0x044F, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432,
+    0x044C, 0x044B, 0x0437, 0x0448, 0x044D, 0x0449, 0x0447, 0x044A, 0x042E, 0x0410, 0x0411, 0x0426,
+    0x0414, 0x0415, 0x0424, 0x0413, 0x0425, 0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041D, 0x041E,
+    0x041F, 0x042F, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412, 0x042C, 0x042B, 0x0417, 0x0428,
+    0x042D, 0x0429, 0x0427, 0x042A,
+];
+
+/// macintosh (Mac OS Roman)
+pub(crate) const MACINTOSH: [u16; 128] = [
+    // 0x80–0x8F
+    0x00C4, 0x00C5, 0x00C7, 0x00C9, 0x00D1, 0x00D6, 0x00DC, 0x00E1, 0x00E0, 0x00E2, 0x00E4, 0x00E3,
+    0x00E5, 0x00E7, 0x00E9, 0x00E8, // 0x90–0x9F
+    0x00EA, 0x00EB, 0x00ED, 0x00EC, 0x00EE, 0x00EF, 0x00F1, 0x00F3, 0x00F2, 0x00F4, 0x00F6, 0x00F5,
+    0x00FA, 0x00F9, 0x00FB, 0x00FC, // 0xA0–0xAF
+    0x2020, 0x00B0, 0x00A2, 0x00A3, 0x00A7, 0x2022, 0x00B6, 0x00DF, 0x00AE, 0x00A9, 0x2122, 0x00B4,
+    0x00A8, 0x2260, 0x00C6, 0x00D8, // 0xB0–0xBF
+    0x221E, 0x00B1, 0x2264, 0x2265, 0x00A5, 0x00B5, 0x2202, 0x2211, 0x220F, 0x03C0, 0x222B, 0x00AA,
+    0x00BA, 0x2126, 0x00E6, 0x00F8, // 0xC0–0xCF
+    0x00BF, 0x00A1, 0x00AC, 0x221A, 0x0192, 0x2248, 0x2206, 0x00AB, 0x00BB, 0x2026, 0x00A0, 0x00C0,
+    0x00C3, 0x00D5, 0x0152, 0x0153, // 0xD0–0xDF
+    0x2013, 0x2014, 0x201C, 0x201D, 0x2018, 0x2019, 0x00F7, 0x25CA, 0x00FF, 0x0178, 0x2044, 0x20AC,
+    0x2039, 0x203A, 0xFB01, 0xFB02, // 0xE0–0xEF
+    0x2021, 0x00B7, 0x201A, 0x201E, 0x2030, 0x00C2, 0x00CA, 0x00C1, 0x00CB, 0x00C8, 0x00CD, 0x00CE,
+    0x00CF, 0x00CC, 0x00D3, 0x00D4, // 0xF0–0xFF
+    0xF8FF, 0x00D2, 0x00DA, 0x00DB, 0x00D9, 0x0131, 0x02C6, 0x02DC, 0x00AF, 0x02D8, 0x02D9, 0x02DA,
+    0x00B8, 0x02DD, 0x02DB, 0x02C7,
+];
+
+/// IBM866 (DOS Cyrillic)
+pub(crate) const IBM866: [u16; 128] = [
+    // 0x80–0x8F: Cyrillic uppercase А–П
+    0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 0x0418, 0x0419, 0x041A, 0x041B,
+    0x041C, 0x041D, 0x041E, 0x041F, // 0x90–0x9F: Cyrillic uppercase Р–Я
+    0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 0x0428, 0x0429, 0x042A, 0x042B,
+    0x042C, 0x042D, 0x042E, 0x042F, // 0xA0–0xAF: Cyrillic lowercase а–п
+    0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, 0x0438, 0x0439, 0x043A, 0x043B,
+    0x043C, 0x043D, 0x043E, 0x043F, // 0xB0–0xBF: box drawing light
+    0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, 0x2555, 0x2563, 0x2551, 0x2557,
+    0x255D, 0x255C, 0x255B, 0x2510, // 0xC0–0xCF: box drawing
+    0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, 0x255A, 0x2554, 0x2569, 0x2566,
+    0x2560, 0x2550, 0x256C, 0x2567, // 0xD0–0xDF: more box drawing
+    0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, 0x256A, 0x2518, 0x250C, 0x2588,
+    0x2584, 0x258C, 0x2590, 0x2580, // 0xE0–0xEF: Cyrillic lowercase р–я
+    0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, 0x0448, 0x0449, 0x044A, 0x044B,
+    0x044C, 0x044D, 0x044E, 0x044F, // 0xF0–0xFF
+    0x0401, 0x0451, 0x0404, 0x0454, 0x0407, 0x0457, 0x040E, 0x045E, 0x00B0, 0x2219, 0x00B7, 0x221A,
+    0x2116, 0x00A4, 0x25A0, 0x00A0,
+];
+
+/// windows-874 (Thai)
+pub(crate) const WINDOWS_874: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0x2026, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xA0–0xAF
+    0x00A0, 0x0E01, 0x0E02, 0x0E03, 0x0E04, 0x0E05, 0x0E06, 0x0E07, 0x0E08, 0x0E09, 0x0E0A, 0x0E0B,
+    0x0E0C, 0x0E0D, 0x0E0E, 0x0E0F, // 0xB0–0xBF
+    0x0E10, 0x0E11, 0x0E12, 0x0E13, 0x0E14, 0x0E15, 0x0E16, 0x0E17, 0x0E18, 0x0E19, 0x0E1A, 0x0E1B,
+    0x0E1C, 0x0E1D, 0x0E1E, 0x0E1F, // 0xC0–0xCF
+    0x0E20, 0x0E21, 0x0E22, 0x0E23, 0x0E24, 0x0E25, 0x0E26, 0x0E27, 0x0E28, 0x0E29, 0x0E2A, 0x0E2B,
+    0x0E2C, 0x0E2D, 0x0E2E, 0x0E2F, // 0xD0–0xDF
+    0x0E30, 0x0E31, 0x0E32, 0x0E33, 0x0E34, 0x0E35, 0x0E36, 0x0E37, 0x0E38, 0x0E39, 0x0E3A, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0x0E3F, // 0xE0–0xEF
+    0x0E40, 0x0E41, 0x0E42, 0x0E43, 0x0E44, 0x0E45, 0x0E46, 0x0E47, 0x0E48, 0x0E49, 0x0E4A, 0x0E4B,
+    0x0E4C, 0x0E4D, 0x0E4E, 0x0E4F, // 0xF0–0xFF
+    0x0E50, 0x0E51, 0x0E52, 0x0E53, 0x0E54, 0x0E55, 0x0E56, 0x0E57, 0x0E58, 0x0E59, 0x0E5A, 0x0E5B,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
+];
+
+/// windows-1250 (Central European)
+pub(crate) const WINDOWS_1250: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0xFFFD, 0x201E, 0x2026, 0x2020, 0x2021, 0xFFFD, 0x2030, 0x0160, 0x2039,
+    0x015A, 0x0164, 0x017D, 0x0179, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0xFFFD, 0x2122, 0x0161, 0x203A,
+    0x015B, 0x0165, 0x017E, 0x017A, // 0xA0–0xAF
+    0x00A0, 0x02C7, 0x02D8, 0x0141, 0x00A4, 0x0104, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x015E, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x017B, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x02DB, 0x0142, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x0105, 0x015F, 0x00BB,
+    0x013D, 0x02DD, 0x013E, 0x017C, // 0xC0–0xCF
+    0x0154, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x0139, 0x0106, 0x00C7, 0x010C, 0x00C9, 0x0118, 0x00CB,
+    0x011A, 0x00CD, 0x00CE, 0x010E, // 0xD0–0xDF
+    0x0110, 0x0143, 0x0147, 0x00D3, 0x00D4, 0x0150, 0x00D6, 0x00D7, 0x0158, 0x016E, 0x00DA, 0x0170,
+    0x00DC, 0x00DD, 0x0162, 0x00DF, // 0xE0–0xEF
+    0x0155, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x013A, 0x0107, 0x00E7, 0x010D, 0x00E9, 0x0119, 0x00EB,
+    0x011B, 0x00ED, 0x00EE, 0x010F, // 0xF0–0xFF
+    0x0111, 0x0144, 0x0148, 0x00F3, 0x00F4, 0x0151, 0x00F6, 0x00F7, 0x0159, 0x016F, 0x00FA, 0x0171,
+    0x00FC, 0x00FD, 0x0163, 0x02D9,
+];
+
+/// windows-1251 (Cyrillic)
+pub(crate) const WINDOWS_1251: [u16; 128] = [
+    // 0x80–0x8F
+    0x0402, 0x0403, 0x201A, 0x0453, 0x201E, 0x2026, 0x2020, 0x2021, 0x20AC, 0x2030, 0x0409, 0x2039,
+    0x040A, 0x040C, 0x040B, 0x040F, // 0x90–0x9F
+    0x0452, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0xFFFD, 0x2122, 0x0459, 0x203A,
+    0x045A, 0x045C, 0x045B, 0x045F, // 0xA0–0xAF
+    0x00A0, 0x040E, 0x045E, 0x0408, 0x00A4, 0x0490, 0x00A6, 0x00A7, 0x0401, 0x00A9, 0x0404, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x0407, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x0406, 0x0456, 0x0491, 0x00B5, 0x00B6, 0x00B7, 0x0451, 0x2116, 0x0454, 0x00BB,
+    0x0458, 0x0405, 0x0455, 0x0457, // 0xC0–0xCF: А–П
+    0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 0x0418, 0x0419, 0x041A, 0x041B,
+    0x041C, 0x041D, 0x041E, 0x041F, // 0xD0–0xDF: Р–Я
+    0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 0x0428, 0x0429, 0x042A, 0x042B,
+    0x042C, 0x042D, 0x042E, 0x042F, // 0xE0–0xEF: а–п
+    0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, 0x0438, 0x0439, 0x043A, 0x043B,
+    0x043C, 0x043D, 0x043E, 0x043F, // 0xF0–0xFF: р–я
+    0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, 0x0448, 0x0449, 0x044A, 0x044B,
+    0x044C, 0x044D, 0x044E, 0x044F,
+];
+
+/// windows-1253 (Greek)
+pub(crate) const WINDOWS_1253: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0xFFFD, 0x2030, 0xFFFD, 0x2039,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0xFFFD, 0x2122, 0xFFFD, 0x203A,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xA0–0xAF
+    0x00A0, 0x0385, 0x0386, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0xFFFD, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x2015, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x0384, 0x00B5, 0x00B6, 0x00B7, 0x0388, 0x0389, 0x038A, 0x00BB,
+    0x038C, 0x00BD, 0x038E, 0x038F, // 0xC0–0xCF
+    0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 0x0398, 0x0399, 0x039A, 0x039B,
+    0x039C, 0x039D, 0x039E, 0x039F, // 0xD0–0xDF
+    0x03A0, 0x03A1, 0xFFFD, 0x03A3, 0x03A4, 0x03A5, 0x03A6, 0x03A7, 0x03A8, 0x03A9, 0x03AA, 0x03AB,
+    0x03AC, 0x03AD, 0x03AE, 0x03AF, // 0xE0–0xEF
+    0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7, 0x03B8, 0x03B9, 0x03BA, 0x03BB,
+    0x03BC, 0x03BD, 0x03BE, 0x03BF, // 0xF0–0xFF
+    0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7, 0x03C8, 0x03C9, 0x03CA, 0x03CB,
+    0x03CC, 0x03CD, 0x03CE, 0xFFFD,
+];
+
+/// windows-1254 (Turkish)
+pub(crate) const WINDOWS_1254: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0x0160, 0x2039,
+    0x0152, 0xFFFD, 0xFFFD, 0xFFFD, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x02DC, 0x2122, 0x0161, 0x203A,
+    0x0153, 0xFFFD, 0xFFFD, 0x0178, // 0xA0–0xAF
+    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00AA, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00BA, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00BF, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x00CC, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF: differs from 1252 at D0, DD, DE
+    0x011E, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7, 0x00D8, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x0130, 0x015E, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x00EC, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF: differs from 1252 at F0, FD, FE
+    0x011F, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7, 0x00F8, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x0131, 0x015F, 0x00FF,
+];
+
+/// windows-1255 (Hebrew)
+pub(crate) const WINDOWS_1255: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0xFFFD, 0x2039,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x02DC, 0x2122, 0xFFFD, 0x203A,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xA0–0xAF
+    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x20AA, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00D7, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00F7, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00BF, // 0xC0–0xCF
+    0x05B0, 0x05B1, 0x05B2, 0x05B3, 0x05B4, 0x05B5, 0x05B6, 0x05B7, 0x05B8, 0x05B9, 0x05BA, 0x05BB,
+    0x05BC, 0x05BD, 0x05BE, 0x05BF, // 0xD0–0xDF
+    0x05C0, 0x05C1, 0x05C2, 0x05C3, 0x05F0, 0x05F1, 0x05F2, 0x05F3, 0x05F4, 0xFFFD, 0xFFFD, 0xFFFD,
+    0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, // 0xE0–0xEF
+    0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7, 0x05D8, 0x05D9, 0x05DA, 0x05DB,
+    0x05DC, 0x05DD, 0x05DE, 0x05DF, // 0xF0–0xFF
+    0x05E0, 0x05E1, 0x05E2, 0x05E3, 0x05E4, 0x05E5, 0x05E6, 0x05E7, 0x05E8, 0x05E9, 0x05EA, 0xFFFD,
+    0xFFFD, 0x200E, 0x200F, 0xFFFD,
+];
+
+/// windows-1256 (Arabic)
+pub(crate) const WINDOWS_1256: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0x067E, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0x0679, 0x2039,
+    0x0152, 0x0686, 0x0698, 0x0688, // 0x90–0x9F
+    0x06AF, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x06A9, 0x2122, 0x0691, 0x203A,
+    0x0153, 0x200C, 0x200D, 0x06BA, // 0xA0–0xAF
+    0x00A0, 0x060C, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x06BE, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x061B, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x061F, // 0xC0–0xCF
+    0x06C1, 0x0621, 0x0622, 0x0623, 0x0624, 0x0625, 0x0626, 0x0627, 0x0628, 0x0629, 0x062A, 0x062B,
+    0x062C, 0x062D, 0x062E, 0x062F, // 0xD0–0xDF
+    0x0630, 0x0631, 0x0632, 0x0633, 0x0634, 0x0635, 0x0636, 0x00D7, 0x0637, 0x0638, 0x0639, 0x063A,
+    0x0640, 0x0641, 0x0642, 0x0643, // 0xE0–0xEF
+    0x00E0, 0x0644, 0x00E2, 0x0645, 0x0646, 0x0647, 0x0648, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x0649, 0x064A, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x064B, 0x064C, 0x064D, 0x064E, 0x00F4, 0x064F, 0x0650, 0x00F7, 0x0651, 0x00F9, 0x0652, 0x00FB,
+    0x00FC, 0x200E, 0x200F, 0x06D2,
+];
+
+/// windows-1257 (Baltic)
+pub(crate) const WINDOWS_1257: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0xFFFD, 0x201E, 0x2026, 0x2020, 0x2021, 0xFFFD, 0x2030, 0xFFFD, 0x2039,
+    0xFFFD, 0x00A8, 0x02C7, 0x00B8, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0xFFFD, 0x2122, 0xFFFD, 0x203A,
+    0xFFFD, 0x00AF, 0x02DB, 0xFFFD, // 0xA0–0xAF
+    0x00A0, 0xFFFD, 0x00A2, 0x00A3, 0x00A4, 0xFFFD, 0x00A6, 0x00A7, 0x00D8, 0x00A9, 0x0156, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00C6, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00F8, 0x00B9, 0x0157, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00E6, // 0xC0–0xCF
+    0x0104, 0x012E, 0x0100, 0x0106, 0x00C4, 0x00C5, 0x0118, 0x0112, 0x010C, 0x00C9, 0x0179, 0x0116,
+    0x0122, 0x0136, 0x012A, 0x013B, // 0xD0–0xDF
+    0x0160, 0x0143, 0x0145, 0x00D3, 0x014C, 0x00D5, 0x00D6, 0x00D7, 0x0172, 0x0141, 0x015A, 0x016A,
+    0x00DC, 0x017B, 0x017D, 0x00DF, // 0xE0–0xEF
+    0x0105, 0x012F, 0x0101, 0x0107, 0x00E4, 0x00E5, 0x0119, 0x0113, 0x010D, 0x00E9, 0x017A, 0x0117,
+    0x0123, 0x0137, 0x012B, 0x013C, // 0xF0–0xFF
+    0x0161, 0x0144, 0x0146, 0x00F3, 0x014D, 0x00F5, 0x00F6, 0x00F7, 0x0173, 0x0142, 0x015B, 0x016B,
+    0x00FC, 0x017C, 0x017E, 0x02D9,
+];
+
+/// windows-1258 (Vietnamese)
+pub(crate) const WINDOWS_1258: [u16; 128] = [
+    // 0x80–0x8F
+    0x20AC, 0xFFFD, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0xFFFD, 0x2039,
+    0x0152, 0xFFFD, 0xFFFD, 0xFFFD, // 0x90–0x9F
+    0xFFFD, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x02DC, 0x2122, 0xFFFD, 0x203A,
+    0x0153, 0xFFFD, 0xFFFD, 0x0178, // 0xA0–0xAF
+    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00AA, 0x00AB,
+    0x00AC, 0x00AD, 0x00AE, 0x00AF, // 0xB0–0xBF
+    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00BA, 0x00BB,
+    0x00BC, 0x00BD, 0x00BE, 0x00BF, // 0xC0–0xCF
+    0x00C0, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB,
+    0x0300, 0x00CD, 0x00CE, 0x00CF, // 0xD0–0xDF
+    0x0110, 0x00D1, 0x0309, 0x00D3, 0x00D4, 0x01A0, 0x00D6, 0x00D7, 0x00D8, 0x00D9, 0x00DA, 0x00DB,
+    0x00DC, 0x01AF, 0x0303, 0x00DF, // 0xE0–0xEF
+    0x00E0, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB,
+    0x0301, 0x00ED, 0x00EE, 0x00EF, // 0xF0–0xFF
+    0x0111, 0x00F1, 0x0323, 0x00F3, 0x00F4, 0x01A1, 0x00F6, 0x00F7, 0x00F8, 0x00F9, 0x00FA, 0x00FB,
+    0x00FC, 0x01B0, 0x20AB, 0x00FF,
+];
+
+/// x-mac-cyrillic
+pub(crate) const X_MAC_CYRILLIC: [u16; 128] = [
+    // 0x80–0x8F
+    0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 0x0418, 0x0419, 0x041A, 0x041B,
+    0x041C, 0x041D, 0x041E, 0x041F, // 0x90–0x9F
+    0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 0x0428, 0x0429, 0x042A, 0x042B,
+    0x042C, 0x042D, 0x042E, 0x042F, // 0xA0–0xAF
+    0x2020, 0x00B0, 0x0490, 0x00A3, 0x00A7, 0x2022, 0x00B6, 0x0406, 0x00AE, 0x00A9, 0x2122, 0x0402,
+    0x0452, 0x2260, 0x0403, 0x0453, // 0xB0–0xBF
+    0x221E, 0x00B1, 0x2264, 0x2265, 0x0456, 0x00B5, 0x0491, 0x0408, 0x0404, 0x0454, 0x0407, 0x0457,
+    0x0409, 0x0459, 0x040A, 0x045A, // 0xC0–0xCF
+    0x0458, 0x0405, 0x00AC, 0x221A, 0x0192, 0x2248, 0x2206, 0x00AB, 0x00BB, 0x2026, 0x00A0, 0x040B,
+    0x045B, 0x040C, 0x045C, 0x0455, // 0xD0–0xDF
+    0x2013, 0x2014, 0x201C, 0x201D, 0x2018, 0x2019, 0x00F7, 0x201E, 0x040E, 0x045E, 0x040F, 0x045F,
+    0x2116, 0x0401, 0x0451, 0x044F, // 0xE0–0xEF
+    0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, 0x0438, 0x0439, 0x043A, 0x043B,
+    0x043C, 0x043D, 0x043E, 0x043F, // 0xF0–0xFF
+    0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, 0x0448, 0x0449, 0x044A, 0x044B,
+    0x044C, 0x044D, 0x044E, 0x20AC,
+];
+
+/// Return the lookup table for a single-byte encoding variant.
+pub(crate) fn table_for(encoding: &crate::Encoding) -> Option<&'static [u16; 128]> {
+    use crate::Encoding::*;
+    match encoding {
+        Windows1252 => Some(&WINDOWS_1252),
+        Iso8859_2 => Some(&ISO_8859_2),
+        Iso8859_3 => Some(&ISO_8859_3),
+        Iso8859_4 => Some(&ISO_8859_4),
+        Iso8859_5 => Some(&ISO_8859_5),
+        Iso8859_6 => Some(&ISO_8859_6),
+        Iso8859_7 => Some(&ISO_8859_7),
+        Iso8859_8 | Iso8859_8I => Some(&ISO_8859_8),
+        Iso8859_10 => Some(&ISO_8859_10),
+        Iso8859_13 => Some(&ISO_8859_13),
+        Iso8859_14 => Some(&ISO_8859_14),
+        Iso8859_15 => Some(&ISO_8859_15),
+        Iso8859_16 => Some(&ISO_8859_16),
+        Koi8R => Some(&KOI8_R),
+        Koi8U => Some(&KOI8_U),
+        Macintosh => Some(&MACINTOSH),
+        Ibm866 => Some(&IBM866),
+        Windows874 => Some(&WINDOWS_874),
+        Windows1250 => Some(&WINDOWS_1250),
+        Windows1251 => Some(&WINDOWS_1251),
+        Windows1253 => Some(&WINDOWS_1253),
+        Windows1254 => Some(&WINDOWS_1254),
+        Windows1255 => Some(&WINDOWS_1255),
+        Windows1256 => Some(&WINDOWS_1256),
+        Windows1257 => Some(&WINDOWS_1257),
+        Windows1258 => Some(&WINDOWS_1258),
+        XMacCyrillic => Some(&X_MAC_CYRILLIC),
+        _ => None,
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::error::EncodingError;
+
+    fn decode_replace(bytes: &[u8], table: &[u16; 128]) -> String {
+        decode_single_byte(bytes, table, "test", ErrorMode::Replacement).unwrap()
+    }
+
+    // -- Basic ASCII passthrough --
+
+    #[test]
+    fn ascii_passthrough() {
+        assert_eq!(
+            decode_replace(b"Hello, world!", &WINDOWS_1252),
+            "Hello, world!"
+        );
+    }
+
+    #[test]
+    fn empty_input() {
+        assert_eq!(decode_replace(b"", &WINDOWS_1252), "");
+    }
+
+    #[test]
+    fn null_byte() {
+        assert_eq!(decode_replace(&[0x00], &WINDOWS_1252), "\0");
+    }
+
+    // -- Windows-1252 --
+
+    #[test]
+    fn windows_1252_euro() {
+        // 0x80 → U+20AC (€)
+        assert_eq!(decode_replace(&[0x80], &WINDOWS_1252), "\u{20AC}");
+    }
+
+    #[test]
+    fn windows_1252_smart_quotes() {
+        // 0x93 → U+201C (") and 0x94 → U+201D (")
+        assert_eq!(
+            decode_replace(&[0x93, 0x94], &WINDOWS_1252),
+            "\u{201C}\u{201D}"
+        );
+    }
+
+    #[test]
+    fn windows_1252_trademark() {
+        // 0x99 → U+2122 (™)
+        assert_eq!(decode_replace(&[0x99], &WINDOWS_1252), "\u{2122}");
+    }
+
+    #[test]
+    fn windows_1252_high_latin() {
+        // 0xE9 → U+00E9 (é)
+        assert_eq!(decode_replace(&[0xE9], &WINDOWS_1252), "\u{00E9}");
+    }
+
+    #[test]
+    fn windows_1252_mixed() {
+        // "Caf" + 0xE9 → "Café"
+        assert_eq!(
+            decode_replace(&[0x43, 0x61, 0x66, 0xE9], &WINDOWS_1252),
+            "Caf\u{00E9}"
+        );
+    }
+
+    // -- ISO-8859-2 (Central European) --
+
+    #[test]
+    fn iso_8859_2_polish() {
+        // 0xA1 → U+0104 (Ą), 0xB1 → U+0105 (ą)
+        assert_eq!(decode_replace(&[0xA1], &ISO_8859_2), "\u{0104}");
+        assert_eq!(decode_replace(&[0xB1], &ISO_8859_2), "\u{0105}");
+    }
+
+    #[test]
+    fn iso_8859_2_czech() {
+        // 0xC8 → U+010C (Č), 0xE8 → U+010D (č)
+        assert_eq!(decode_replace(&[0xC8], &ISO_8859_2), "\u{010C}");
+        assert_eq!(decode_replace(&[0xE8], &ISO_8859_2), "\u{010D}");
+    }
+
+    // -- ISO-8859-5 (Cyrillic) --
+
+    #[test]
+    fn iso_8859_5_cyrillic() {
+        // 0xB0 → U+0410 (А), 0xD0 → U+0430 (а)
+        assert_eq!(decode_replace(&[0xB0], &ISO_8859_5), "\u{0410}");
+        assert_eq!(decode_replace(&[0xD0], &ISO_8859_5), "\u{0430}");
+    }
+
+    // -- ISO-8859-7 (Greek) --
+
+    #[test]
+    fn iso_8859_7_greek() {
+        // 0xC1 → U+0391 (Α), 0xE1 → U+03B1 (α)
+        assert_eq!(decode_replace(&[0xC1], &ISO_8859_7), "\u{0391}");
+        assert_eq!(decode_replace(&[0xE1], &ISO_8859_7), "\u{03B1}");
+    }
+
+    // -- ISO-8859-15 (Latin-9) --
+
+    #[test]
+    fn iso_8859_15_euro() {
+        // 0xA4 → U+20AC (€) — differs from ISO-8859-1
+        assert_eq!(decode_replace(&[0xA4], &ISO_8859_15), "\u{20AC}");
+    }
+
+    #[test]
+    fn iso_8859_15_oe_ligature() {
+        // 0xBC → U+0152 (Œ), 0xBD → U+0153 (œ)
+        assert_eq!(decode_replace(&[0xBC], &ISO_8859_15), "\u{0152}");
+        assert_eq!(decode_replace(&[0xBD], &ISO_8859_15), "\u{0153}");
+    }
+
+    // -- KOI8-R (Russian) --
+
+    #[test]
+    fn koi8_r_cyrillic() {
+        // 0xC1 → U+0430 (а), 0xE1 → U+0410 (А)
+        assert_eq!(decode_replace(&[0xC1], &KOI8_R), "\u{0430}");
+        assert_eq!(decode_replace(&[0xE1], &KOI8_R), "\u{0410}");
+    }
+
+    #[test]
+    fn koi8_r_copyright() {
+        // 0xBF → U+00A9 (©)
+        assert_eq!(decode_replace(&[0xBF], &KOI8_R), "\u{00A9}");
+    }
+
+    // -- Windows-1251 (Cyrillic) --
+
+    #[test]
+    fn windows_1251_cyrillic() {
+        // 0xC0 → U+0410 (А), 0xE0 → U+0430 (а)
+        assert_eq!(decode_replace(&[0xC0], &WINDOWS_1251), "\u{0410}");
+        assert_eq!(decode_replace(&[0xE0], &WINDOWS_1251), "\u{0430}");
+    }
+
+    #[test]
+    fn windows_1251_euro() {
+        // 0x88 → U+20AC (€)
+        assert_eq!(decode_replace(&[0x88], &WINDOWS_1251), "\u{20AC}");
+    }
+
+    // -- macintosh --
+
+    #[test]
+    fn macintosh_special() {
+        // 0x80 → U+00C4 (Ä), 0xCA → U+00A0 (NBSP)
+        assert_eq!(decode_replace(&[0x80], &MACINTOSH), "\u{00C4}");
+        assert_eq!(decode_replace(&[0xCA], &MACINTOSH), "\u{00A0}");
+    }
+
+    // -- IBM866 --
+
+    #[test]
+    fn ibm866_cyrillic() {
+        // 0x80 → U+0410 (А), 0xA0 → U+0430 (а)
+        assert_eq!(decode_replace(&[0x80], &IBM866), "\u{0410}");
+        assert_eq!(decode_replace(&[0xA0], &IBM866), "\u{0430}");
+    }
+
+    // -- Unmapped bytes --
+
+    #[test]
+    fn unmapped_replacement() {
+        // ISO-8859-3 has unmapped bytes, e.g. 0xA5
+        assert_eq!(decode_replace(&[0xA5], &ISO_8859_3), "\u{FFFD}");
+    }
+
+    #[test]
+    fn unmapped_fatal() {
+        let err = decode_single_byte(&[0x41, 0xA5], &ISO_8859_3, "ISO-8859-3", ErrorMode::Fatal)
+            .unwrap_err();
+        assert!(matches!(
+            err,
+            EncodingError::InvalidSequence {
+                encoding: "ISO-8859-3",
+                position: 1
+            }
+        ));
+    }
+
+    // -- Table sizes --
+
+    #[test]
+    fn all_tables_128_entries() {
+        assert_eq!(WINDOWS_1252.len(), 128);
+        assert_eq!(ISO_8859_2.len(), 128);
+        assert_eq!(ISO_8859_3.len(), 128);
+        assert_eq!(ISO_8859_4.len(), 128);
+        assert_eq!(ISO_8859_5.len(), 128);
+        assert_eq!(ISO_8859_6.len(), 128);
+        assert_eq!(ISO_8859_7.len(), 128);
+        assert_eq!(ISO_8859_8.len(), 128);
+        assert_eq!(ISO_8859_10.len(), 128);
+        assert_eq!(ISO_8859_13.len(), 128);
+        assert_eq!(ISO_8859_14.len(), 128);
+        assert_eq!(ISO_8859_15.len(), 128);
+        assert_eq!(ISO_8859_16.len(), 128);
+        assert_eq!(KOI8_R.len(), 128);
+        assert_eq!(KOI8_U.len(), 128);
+        assert_eq!(MACINTOSH.len(), 128);
+        assert_eq!(IBM866.len(), 128);
+        assert_eq!(WINDOWS_874.len(), 128);
+        assert_eq!(WINDOWS_1250.len(), 128);
+        assert_eq!(WINDOWS_1251.len(), 128);
+        assert_eq!(WINDOWS_1253.len(), 128);
+        assert_eq!(WINDOWS_1254.len(), 128);
+        assert_eq!(WINDOWS_1255.len(), 128);
+        assert_eq!(WINDOWS_1256.len(), 128);
+        assert_eq!(WINDOWS_1257.len(), 128);
+        assert_eq!(WINDOWS_1258.len(), 128);
+        assert_eq!(X_MAC_CYRILLIC.len(), 128);
+    }
+}