Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 767 insertions, 0 deletions

diff --git a/third_party/rust/encoding_rs/src/gb18030.rs b/third_party/rust/encoding_rs/src/gb18030.rs
new file mode 100644
index 0000000000..a0b3bd7f03
--- /dev/null
+++ b/third_party/rust/encoding_rs/src/gb18030.rs
@@ -0,0 +1,767 @@
+// Copyright Mozilla Foundation. See the COPYRIGHT
+// file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use super::*;
+use crate::data::*;
+use crate::handles::*;
+use crate::variant::*;
+// Rust 1.14.0 requires the following despite the asterisk above.
+use super::in_inclusive_range16;
+use super::in_range16;
+
+enum Gb18030Pending {
+    None,
+    One(u8),
+    Two(u8, u8),
+    Three(u8, u8, u8),
+}
+
+impl Gb18030Pending {
+    fn is_none(&self) -> bool {
+        match *self {
+            Gb18030Pending::None => true,
+            _ => false,
+        }
+    }
+
+    fn count(&self) -> usize {
+        match *self {
+            Gb18030Pending::None => 0,
+            Gb18030Pending::One(_) => 1,
+            Gb18030Pending::Two(_, _) => 2,
+            Gb18030Pending::Three(_, _, _) => 3,
+        }
+    }
+}
+
+pub struct Gb18030Decoder {
+    first: Option<u8>,
+    second: Option<u8>,
+    third: Option<u8>,
+    pending: Gb18030Pending,
+    pending_ascii: Option<u8>,
+}
+
+impl Gb18030Decoder {
+    pub fn new() -> VariantDecoder {
+        VariantDecoder::Gb18030(Gb18030Decoder {
+            first: None,
+            second: None,
+            third: None,
+            pending: Gb18030Pending::None,
+            pending_ascii: None,
+        })
+    }
+
+    pub fn in_neutral_state(&self) -> bool {
+        self.first.is_none()
+            && self.second.is_none()
+            && self.third.is_none()
+            && self.pending.is_none()
+            && self.pending_ascii.is_none()
+    }
+
+    fn extra_from_state(&self, byte_length: usize) -> Option<usize> {
+        byte_length.checked_add(
+            self.pending.count()
+                + match self.first {
+                    None => 0,
+                    Some(_) => 1,
+                }
+                + match self.second {
+                    None => 0,
+                    Some(_) => 1,
+                }
+                + match self.third {
+                    None => 0,
+                    Some(_) => 1,
+                }
+                + match self.pending_ascii {
+                    None => 0,
+                    Some(_) => 1,
+                },
+        )
+    }
+
+    pub fn max_utf16_buffer_length(&self, byte_length: usize) -> Option<usize> {
+        // ASCII: 1 to 1 (worst case)
+        // gbk: 2 to 1
+        // ranges: 4 to 1 or 4 to 2
+        checked_add(1, self.extra_from_state(byte_length))
+    }
+
+    pub fn max_utf8_buffer_length_without_replacement(&self, byte_length: usize) -> Option<usize> {
+        // ASCII: 1 to 1
+        // gbk: 2 to 2 or 2 to 3
+        // ranges: 4 to 2, 4 to 3 or 4 to 4
+        // 0x80: 1 to 3 (worst case)
+        self.max_utf8_buffer_length(byte_length)
+    }
+
+    pub fn max_utf8_buffer_length(&self, byte_length: usize) -> Option<usize> {
+        checked_add(1, checked_mul(3, self.extra_from_state(byte_length)))
+    }
+
+    gb18030_decoder_functions!(
+        {
+            // If first is between 0x81 and 0xFE, inclusive,
+            // subtract offset 0x81.
+            let non_ascii_minus_offset = non_ascii.wrapping_sub(0x81);
+            if non_ascii_minus_offset > (0xFE - 0x81) {
+                if non_ascii == 0x80 {
+                    handle.write_upper_bmp(0x20ACu16);
+                    continue 'outermost;
+                }
+                return (DecoderResult::Malformed(1, 0),
+                        source.consumed(),
+                        handle.written());
+            }
+            non_ascii_minus_offset
+        },
+        {
+            // Two-byte (or error)
+            if first_minus_offset >= 0x20 {
+                // Not the gbk ideograph range above GB2312
+                let trail_minus_offset = second.wrapping_sub(0xA1);
+                if trail_minus_offset <= (0xFE - 0xA1) {
+                    // GB2312
+                    let hanzi_lead = first_minus_offset.wrapping_sub(0x2F);
+                    if hanzi_lead < (0x77 - 0x2F) {
+                        // Level 1 Hanzi, Level 2 Hanzi
+                        // or one of the 5 PUA code
+                        // points in between.
+                        let hanzi_pointer = mul_94(hanzi_lead) + trail_minus_offset as usize;
+                        let upper_bmp = GB2312_HANZI[hanzi_pointer];
+                        handle.write_upper_bmp(upper_bmp)
+                    } else if first_minus_offset == 0x20 {
+                        // Symbols (starting with ideographic space)
+                        let bmp = GB2312_SYMBOLS[trail_minus_offset as usize];
+                        handle.write_bmp_excl_ascii(bmp)
+                    } else if first_minus_offset == 0x25 && ((trail_minus_offset.wrapping_sub(63) as usize) < GB2312_SYMBOLS_AFTER_GREEK.len()) {
+                        handle.write_bmp_excl_ascii(GB2312_SYMBOLS_AFTER_GREEK[trail_minus_offset.wrapping_sub(63) as usize])
+                    } else if first_minus_offset == 0x27 && (trail_minus_offset as usize) < GB2312_PINYIN.len() {
+                        handle.write_bmp_excl_ascii(GB2312_PINYIN[trail_minus_offset as usize])
+                    } else if first_minus_offset > 0x76 {
+                        // Bottom PUA
+                        let pua = (0xE234 + mul_94(first_minus_offset - 0x77) + trail_minus_offset as usize) as u16;
+                        handle.write_upper_bmp(pua)
+                    } else {
+                        let bmp = gb2312_other_decode((mul_94(first_minus_offset - 0x21) + (trail_minus_offset as usize)) as u16);
+                        handle.write_bmp_excl_ascii(bmp)
+                    }
+                } else {
+                    // gbk range on the left
+                    let mut trail_minus_offset = second.wrapping_sub(0x40);
+                    if trail_minus_offset > (0x7E - 0x40) {
+                        let trail_minus_range_start = second.wrapping_sub(0x80);
+                        if trail_minus_range_start > (0xA0 - 0x80) {
+                            if second < 0x80 {
+                                return (DecoderResult::Malformed(1, 0),
+                                        unread_handle_second.unread(),
+                                        handle.written());
+                            }
+                            return (DecoderResult::Malformed(2, 0),
+                                    unread_handle_second.consumed(),
+                                    handle.written());
+                        }
+                        trail_minus_offset = second - 0x41;
+                    }
+                    // Zero-base lead
+                    let left_lead = first_minus_offset - 0x20;
+                    let left_pointer = left_lead as usize * (190 - 94) +
+                                       trail_minus_offset as usize;
+                    let gbk_left_ideograph_pointer = left_pointer.wrapping_sub((0x29 - 0x20) * (190 - 94));
+                    if gbk_left_ideograph_pointer < (((0x7D - 0x29) * (190 - 94)) - 5) {
+                        let upper_bmp = gbk_left_ideograph_decode(gbk_left_ideograph_pointer as u16);
+                        handle.write_upper_bmp(upper_bmp)
+                    } else if left_pointer < ((0x29 - 0x20) * (190 - 94)) {
+                        let bmp = gbk_other_decode(left_pointer as u16);
+                        handle.write_bmp_excl_ascii(bmp)
+                    } else {
+                        let bottom_pointer = left_pointer - (((0x7D - 0x20) * (190 - 94)) - 5);
+                        let upper_bmp = GBK_BOTTOM[bottom_pointer];
+                        handle.write_upper_bmp(upper_bmp)
+                    }
+                }
+            } else {
+                // gbk ideograph range above GB2312
+                let mut trail_minus_offset = second.wrapping_sub(0x40);
+                if trail_minus_offset > (0x7E - 0x40) {
+                    let trail_minus_range_start = second.wrapping_sub(0x80);
+                    if trail_minus_range_start > (0xFE - 0x80) {
+                        if second < 0x80 {
+                            return (DecoderResult::Malformed(1, 0),
+                                    unread_handle_second.unread(),
+                                    handle.written());
+                        }
+                        return (DecoderResult::Malformed(2, 0),
+                                unread_handle_second.consumed(),
+                                handle.written());
+                    }
+                    trail_minus_offset = second - 0x41;
+                }
+                let pointer = first_minus_offset as usize * 190usize +
+                              trail_minus_offset as usize;
+                let upper_bmp = gbk_top_ideograph_decode(pointer as u16);
+                handle.write_upper_bmp(upper_bmp)
+            }
+        },
+        {
+            // If third is between 0x81 and 0xFE, inclusive,
+            // subtract offset 0x81.
+            let third_minus_offset = third.wrapping_sub(0x81);
+            if third_minus_offset > (0xFE - 0x81) {
+                // We have an error. Let's inline what's going
+                // to happen when `second` is
+                // reprocessed. (`third` gets unread.)
+                // `second` is guaranteed ASCII, so let's
+                // put it in `pending_ascii`. Recompute
+                // `second` from `second_minus_offset`.
+                self.pending_ascii = Some(second_minus_offset + 0x30);
+                // Now unread `third` and designate the previous
+                // `first` as being in error.
+                return (DecoderResult::Malformed(1, 1),
+                        unread_handle_third.unread(),
+                        handle.written());
+            }
+            third_minus_offset
+        },
+        {
+            // If fourth is between 0x30 and 0x39, inclusive,
+            // subtract offset 0x30.
+            //
+            // If we have an error, we'll inline what's going
+            // to happen when `second` and `third` are
+            // reprocessed. (`fourth` gets unread.)
+            // `second` is guaranteed ASCII, so let's
+            // put it in `pending_ascii`. Recompute
+            // `second` from `second_minus_offset` to
+            // make this block reusable when `second`
+            // is not in scope.
+            //
+            // `third` is guaranteed to be in the range
+            // that makes it become the new `self.first`.
+            //
+            // `fourth` gets unread and the previous
+            // `first` gets designates as being in error.
+            let fourth_minus_offset = fourth.wrapping_sub(0x30);
+            if fourth_minus_offset > (0x39 - 0x30) {
+                self.pending_ascii = Some(second_minus_offset + 0x30);
+                self.pending = Gb18030Pending::One(third_minus_offset);
+                return (DecoderResult::Malformed(1, 2),
+                        unread_handle_fourth.unread(),
+                        handle.written());
+            }
+            let pointer = (first_minus_offset as usize * (10 * 126 * 10)) +
+                          (second_minus_offset as usize * (10 * 126)) +
+                          (third_minus_offset as usize * 10) +
+                          fourth_minus_offset as usize;
+            if pointer <= 39419 {
+                // BMP
+                if pointer == 7457 {
+                    handle.write_upper_bmp(0xE7C7)
+                } else {
+                    handle.write_bmp_excl_ascii(gb18030_range_decode(pointer as u16))
+                }
+            } else if pointer >= 189_000 && pointer <= 1_237_575 {
+                // Astral
+                handle.write_astral((pointer - (189_000usize - 0x1_0000usize)) as u32)
+            } else {
+                return (DecoderResult::Malformed(4, 0),
+                        unread_handle_fourth.consumed(),
+                        handle.written());
+            }
+        },
+        self,
+        non_ascii,
+        first_minus_offset,
+        second,
+        second_minus_offset,
+        unread_handle_second,
+        third,
+        third_minus_offset,
+        unread_handle_third,
+        fourth,
+        fourth_minus_offset,
+        unread_handle_fourth,
+        source,
+        handle,
+        'outermost);
+}
+
+// XXX Experiment with inline directives
+fn gbk_encode_non_unified(bmp: u16) -> Option<(usize, usize)> {
+    // Try ideographic punctuation first as it's the most likely case.
+    // Throwing in the check for full-width currencies and tilde is probably
+    // more size-efficient here than elsewhere.
+    if in_inclusive_range16(bmp, 0x2014, 0x3017) || in_inclusive_range16(bmp, 0xFF04, 0xFFE1) {
+        if let Some(pos) = position(&GB2312_SYMBOLS[..], bmp) {
+            return Some((0xA1, pos + 0xA1));
+        }
+    }
+    // Ext A
+    if in_range16(bmp, 0x3400, 0x4E00) {
+        return position(&GBK_BOTTOM[21..100], bmp).map(|pos| {
+            (
+                0xFE,
+                pos + if pos < (0x3F - 16) {
+                    0x40 + 16
+                } else {
+                    0x41 + 16
+                },
+            )
+        });
+    }
+    // Compatibility ideographs
+    if in_range16(bmp, 0xF900, 0xFB00) {
+        return position(&GBK_BOTTOM[0..21], bmp).map(|pos| {
+            if pos < 5 {
+                // end of second to last row
+                (0xFD, pos + (190 - 94 - 5 + 0x41))
+            } else {
+                // last row
+                (0xFE, pos + (0x40 - 5))
+            }
+        });
+    }
+    // Handle everything below U+02CA, which is in GBK_OTHER.
+    if bmp < 0x02CA {
+        if in_range16(bmp, 0x00E0, 0x0262) && bmp != 0x00F7 {
+            // Pinyin except U+1E3F
+            if let Some(pos) = position(&GB2312_PINYIN[..], bmp) {
+                return Some((0xA8, pos + 0xA1));
+            }
+        } else if in_inclusive_range16(bmp, 0x00A4, 0x00F7)
+            || in_inclusive_range16(bmp, 0x02C7, 0x02C9)
+        {
+            // Diacritics and Latin 1 symbols
+            if let Some(pos) = position(&GB2312_SYMBOLS[3..(0xAC - 0x60)], bmp) {
+                return Some((0xA1, pos + 0xA1 + 3));
+            }
+        }
+        return None;
+    }
+    if bmp >= 0xE794 {
+        // Various brackets, all in PUA or full-width regions
+        if let Some(pos) = position(&GB2312_SYMBOLS_AFTER_GREEK[..], bmp) {
+            return Some((0xA6, pos + (0x9F - 0x60 + 0xA1)));
+        }
+    } else if bmp == 0x1E3F {
+        // The one Pinyin placed elsewhere on the BMP
+        return Some((0xA8, 0x7B - 0x60 + 0xA1));
+    } else if in_range16(bmp, 0xA000, 0xD800) {
+        // Since Korean has usage in China, let's spend a branch to fast-track
+        // Hangul.
+        return None;
+    }
+    // GB2312 other (except bottom PUA and PUA between Hanzi levels).
+    if let Some(other_pointer) = gb2312_other_encode(bmp) {
+        let other_lead = other_pointer as usize / 94;
+        let other_trail = other_pointer as usize % 94;
+        return Some((0xA2 + other_lead, 0xA1 + other_trail));
+    }
+    // At this point, we've handled all mappable characters above U+02D9 but
+    // below U+2010. Let's check for that range in order to let lower BMP
+    // characters used for minority languages in China avoid the subsequent
+    // search that deals mainly with various symbols.
+    if in_range16(bmp, 0x02DA, 0x2010) {
+        return None;
+    }
+    // GBK other (except radicals and PUA in GBK_BOTTOM).
+    if let Some(other_pointer) = gbk_other_encode(bmp) {
+        let other_lead = other_pointer as usize / (190 - 94);
+        let other_trail = other_pointer as usize % (190 - 94);
+        let offset = if other_trail < 0x3F { 0x40 } else { 0x41 };
+        return Some((other_lead + (0x81 + 0x20), other_trail + offset));
+    }
+    // CJK Radicals Supplement or PUA in GBK_BOTTOM
+    if in_inclusive_range16(bmp, 0x2E81, 0x2ECA) || in_inclusive_range16(bmp, 0xE816, 0xE864) {
+        if let Some(pos) = position(&GBK_BOTTOM[21..], bmp) {
+            let trail = pos + 16;
+            let offset = if trail < 0x3F { 0x40 } else { 0x41 };
+            return Some((0xFE, trail + offset));
+        }
+    }
+    // GB2312 bottom PUA
+    let bmp_minus_gb2312_bottom_pua = bmp.wrapping_sub(0xE234);
+    if bmp_minus_gb2312_bottom_pua <= (0xE4C5 - 0xE234) {
+        let pua_lead = bmp_minus_gb2312_bottom_pua as usize / 94;
+        let pua_trail = bmp_minus_gb2312_bottom_pua as usize % 94;
+        return Some((0x81 + 0x77 + pua_lead, 0xA1 + pua_trail));
+    }
+    // PUA between Hanzi Levels
+    let bmp_minus_pua_between_hanzi = bmp.wrapping_sub(0xE810);
+    if bmp_minus_pua_between_hanzi < 5 {
+        return Some((0x81 + 0x56, 0xFF - 5 + bmp_minus_pua_between_hanzi as usize));
+    }
+    None
+}
+
+#[cfg(not(feature = "fast-gb-hanzi-encode"))]
+#[inline(always)]
+fn encode_hanzi(bmp: u16, _: u16) -> (u8, u8) {
+    if let Some((lead, trail)) = gb2312_level1_hanzi_encode(bmp) {
+        (lead, trail)
+    } else if let Some(hanzi_pointer) = gb2312_level2_hanzi_encode(bmp) {
+        let hanzi_lead = (hanzi_pointer / 94) + (0xD8);
+        let hanzi_trail = (hanzi_pointer % 94) + 0xA1;
+        (hanzi_lead as u8, hanzi_trail as u8)
+    } else {
+        let (lead, gbk_trail) = if bmp < 0x72DC {
+            // Above GB2312
+            let pointer = gbk_top_ideograph_encode(bmp) as usize;
+            let lead = (pointer / 190) + 0x81;
+            let gbk_trail = pointer % 190;
+            (lead, gbk_trail)
+        } else {
+            // To the left of GB2312
+            let gbk_left_ideograph_pointer = gbk_left_ideograph_encode(bmp) as usize;
+            let lead = (gbk_left_ideograph_pointer / (190 - 94)) + (0x81 + 0x29);
+            let gbk_trail = gbk_left_ideograph_pointer % (190 - 94);
+            (lead, gbk_trail)
+        };
+        let offset = if gbk_trail < 0x3F { 0x40 } else { 0x41 };
+        (lead as u8, (gbk_trail + offset) as u8)
+    }
+}
+
+#[cfg(feature = "fast-gb-hanzi-encode")]
+#[inline(always)]
+fn encode_hanzi(_: u16, bmp_minus_unified_start: u16) -> (u8, u8) {
+    gbk_hanzi_encode(bmp_minus_unified_start)
+}
+
+pub struct Gb18030Encoder {
+    extended: bool,
+}
+
+impl Gb18030Encoder {
+    pub fn new(encoding: &'static Encoding, extended_range: bool) -> Encoder {
+        Encoder::new(
+            encoding,
+            VariantEncoder::Gb18030(Gb18030Encoder {
+                extended: extended_range,
+            }),
+        )
+    }
+
+    pub fn max_buffer_length_from_utf16_without_replacement(
+        &self,
+        u16_length: usize,
+    ) -> Option<usize> {
+        if self.extended {
+            u16_length.checked_mul(4)
+        } else {
+            // Need to add, because space check is done with the four-byte
+            // assumption.
+            checked_add(2, u16_length.checked_mul(2))
+        }
+    }
+
+    pub fn max_buffer_length_from_utf8_without_replacement(
+        &self,
+        byte_length: usize,
+    ) -> Option<usize> {
+        if self.extended {
+            // 1 to 1
+            // 2 to 2
+            // 3 to 2
+            // 2 to 4 (worst)
+            // 3 to 4
+            // 4 to 4
+            checked_add(2, byte_length.checked_mul(2))
+        } else {
+            // 1 to 1
+            // 2 to 2
+            // 3 to 2
+            // Need to add, because space check is done with the four-byte
+            // assumption.
+            byte_length.checked_add(3)
+        }
+    }
+
+    ascii_compatible_encoder_functions!(
+        {
+            let bmp_minus_unified_start = bmp.wrapping_sub(0x4E00);
+            if bmp_minus_unified_start < (0x9FA6 - 0x4E00) {
+                // CJK Unified Ideographs
+                // Can't fail now, since all are
+                // mapped.
+                let (lead, trail) = encode_hanzi(bmp, bmp_minus_unified_start);
+                handle.write_two(lead, trail)
+            } else if bmp == 0xE5E5 {
+                // It's not optimal to check for the unmappable
+                // and for euro at this stage, but getting
+                // the out of the way makes the rest of the
+                // code less messy.
+                return (
+                    EncoderResult::unmappable_from_bmp(bmp),
+                    source.consumed(),
+                    handle.written(),
+                );
+            } else if bmp == 0x20AC && !self.extended {
+                handle.write_one(0x80u8)
+            } else {
+                match gbk_encode_non_unified(bmp) {
+                    Some((lead, trail)) => handle.write_two(lead as u8, trail as u8),
+                    None => {
+                        if !self.extended {
+                            return (
+                                EncoderResult::unmappable_from_bmp(bmp),
+                                source.consumed(),
+                                handle.written(),
+                            );
+                        }
+                        let range_pointer = gb18030_range_encode(bmp);
+                        let first = range_pointer / (10 * 126 * 10);
+                        let rem_first = range_pointer % (10 * 126 * 10);
+                        let second = rem_first / (10 * 126);
+                        let rem_second = rem_first % (10 * 126);
+                        let third = rem_second / 10;
+                        let fourth = rem_second % 10;
+                        handle.write_four(
+                            (first + 0x81) as u8,
+                            (second + 0x30) as u8,
+                            (third + 0x81) as u8,
+                            (fourth + 0x30) as u8,
+                        )
+                    }
+                }
+            }
+        },
+        {
+            if !self.extended {
+                return (
+                    EncoderResult::Unmappable(astral),
+                    source.consumed(),
+                    handle.written(),
+                );
+            }
+            let range_pointer = astral as usize + (189_000usize - 0x1_0000usize);
+            let first = range_pointer / (10 * 126 * 10);
+            let rem_first = range_pointer % (10 * 126 * 10);
+            let second = rem_first / (10 * 126);
+            let rem_second = rem_first % (10 * 126);
+            let third = rem_second / 10;
+            let fourth = rem_second % 10;
+            handle.write_four(
+                (first + 0x81) as u8,
+                (second + 0x30) as u8,
+                (third + 0x81) as u8,
+                (fourth + 0x30) as u8,
+            )
+        },
+        bmp,
+        astral,
+        self,
+        source,
+        handle,
+        copy_ascii_to_check_space_four,
+        check_space_four,
+        false
+    );
+}
+
+// Any copyright to the test code below this comment is dedicated to the
+// Public Domain. http://creativecommons.org/publicdomain/zero/1.0/
+
+#[cfg(all(test, feature = "alloc"))]
+mod tests {
+    use super::super::testing::*;
+    use super::super::*;
+
+    fn decode_gb18030(bytes: &[u8], expect: &str) {
+        decode(GB18030, bytes, expect);
+    }
+
+    fn encode_gb18030(string: &str, expect: &[u8]) {
+        encode(GB18030, string, expect);
+    }
+
+    fn encode_gbk(string: &str, expect: &[u8]) {
+        encode(GBK, string, expect);
+    }
+
+    #[test]
+    fn test_gb18030_decode() {
+        // Empty
+        decode_gb18030(b"", &"");
+
+        // ASCII
+        decode_gb18030(b"\x61\x62", "\u{0061}\u{0062}");
+
+        // euro
+        decode_gb18030(b"\x80", "\u{20AC}");
+        decode_gb18030(b"\xA2\xE3", "\u{20AC}");
+
+        // two bytes
+        decode_gb18030(b"\x81\x40", "\u{4E02}");
+        decode_gb18030(b"\x81\x7E", "\u{4E8A}");
+        decode_gb18030(b"\x81\x7F", "\u{FFFD}\u{007F}");
+        decode_gb18030(b"\x81\x80", "\u{4E90}");
+        decode_gb18030(b"\x81\xFE", "\u{4FA2}");
+        decode_gb18030(b"\xFE\x40", "\u{FA0C}");
+        decode_gb18030(b"\xFE\x7E", "\u{E843}");
+        decode_gb18030(b"\xFE\x7F", "\u{FFFD}\u{007F}");
+        decode_gb18030(b"\xFE\x80", "\u{4723}");
+        decode_gb18030(b"\xFE\xFE", "\u{E4C5}");
+
+        // The difference from the original GB18030
+        decode_gb18030(b"\xA3\xA0", "\u{3000}");
+        decode_gb18030(b"\xA1\xA1", "\u{3000}");
+
+        // 0xFF
+        decode_gb18030(b"\xFF\x40", "\u{FFFD}\u{0040}");
+        decode_gb18030(b"\xE3\xFF\x9A\x33", "\u{FFFD}\u{FFFD}"); // not \u{FFFD}\u{FFFD}\u{0033} !
+        decode_gb18030(b"\xFF\x32\x9A\x33", "\u{FFFD}\u{0032}\u{FFFD}"); // not \u{FFFD}\u{0032}\u{FFFD}\u{0033} !
+        decode_gb18030(b"\xFF\x40\x00", "\u{FFFD}\u{0040}\u{0000}");
+        decode_gb18030(b"\xE3\xFF\x9A\x33\x00", "\u{FFFD}\u{FFFD}\u{0033}\u{0000}");
+        decode_gb18030(
+            b"\xFF\x32\x9A\x33\x00",
+            "\u{FFFD}\u{0032}\u{FFFD}\u{0033}\u{0000}",
+        );
+
+        // Four bytes
+        decode_gb18030(b"\x81\x30\x81\x30", "\u{0080}");
+        decode_gb18030(b"\x81\x35\xF4\x37", "\u{E7C7}");
+        decode_gb18030(b"\x81\x37\xA3\x30", "\u{2603}");
+        decode_gb18030(b"\x94\x39\xDA\x33", "\u{1F4A9}");
+        decode_gb18030(b"\xE3\x32\x9A\x35", "\u{10FFFF}");
+        decode_gb18030(b"\xE3\x32\x9A\x36\x81\x30", "\u{FFFD}\u{FFFD}");
+        decode_gb18030(b"\xE3\x32\x9A\x36\x81\x40", "\u{FFFD}\u{4E02}");
+        decode_gb18030(b"\xE3\x32\x9A", "\u{FFFD}"); // not \u{FFFD}\u{0032}\u{FFFD} !
+        decode_gb18030(b"\xE3\x32\x9A\x00", "\u{FFFD}\u{0032}\u{FFFD}\u{0000}");
+    }
+
+    #[test]
+    fn test_gb18030_encode() {
+        // Empty
+        encode_gb18030("", b"");
+
+        // ASCII
+        encode_gb18030("\u{0061}\u{0062}", b"\x61\x62");
+
+        // euro
+        encode_gb18030("\u{20AC}", b"\xA2\xE3");
+
+        // two bytes
+        encode_gb18030("\u{4E02}", b"\x81\x40");
+        encode_gb18030("\u{4E8A}", b"\x81\x7E");
+        if !cfg!(miri) {
+            // Miri is too slow
+            encode_gb18030("\u{4E90}", b"\x81\x80");
+            encode_gb18030("\u{4FA2}", b"\x81\xFE");
+            encode_gb18030("\u{FA0C}", b"\xFE\x40");
+            encode_gb18030("\u{E843}", b"\xFE\x7E");
+            encode_gb18030("\u{4723}", b"\xFE\x80");
+            encode_gb18030("\u{E4C5}", b"\xFE\xFE");
+        }
+
+        // The difference from the original GB18030
+        encode_gb18030("\u{E5E5}", b"&#58853;");
+        encode_gb18030("\u{3000}", b"\xA1\xA1");
+
+        // Four bytes
+        encode_gb18030("\u{0080}", b"\x81\x30\x81\x30");
+        encode_gb18030("\u{E7C7}", b"\x81\x35\xF4\x37");
+        if !cfg!(miri) {
+            // Miri is too slow
+            encode_gb18030("\u{2603}", b"\x81\x37\xA3\x30");
+            encode_gb18030("\u{1F4A9}", b"\x94\x39\xDA\x33");
+            encode_gb18030("\u{10FFFF}", b"\xE3\x32\x9A\x35");
+        }
+
+        // Edge cases
+        encode_gb18030("\u{00F7}", b"\xA1\xC2");
+    }
+
+    #[test]
+    fn test_gbk_encode() {
+        // Empty
+        encode_gbk("", b"");
+
+        // ASCII
+        encode_gbk("\u{0061}\u{0062}", b"\x61\x62");
+
+        // euro
+        encode_gbk("\u{20AC}", b"\x80");
+
+        // two bytes
+        encode_gbk("\u{4E02}", b"\x81\x40");
+        encode_gbk("\u{4E8A}", b"\x81\x7E");
+        if !cfg!(miri) {
+            // Miri is too slow
+            encode_gbk("\u{4E90}", b"\x81\x80");
+            encode_gbk("\u{4FA2}", b"\x81\xFE");
+            encode_gbk("\u{FA0C}", b"\xFE\x40");
+            encode_gbk("\u{E843}", b"\xFE\x7E");
+            encode_gbk("\u{4723}", b"\xFE\x80");
+            encode_gbk("\u{E4C5}", b"\xFE\xFE");
+        }
+
+        // The difference from the original gb18030
+        encode_gbk("\u{E5E5}", b"&#58853;");
+        encode_gbk("\u{3000}", b"\xA1\xA1");
+
+        // Four bytes
+        encode_gbk("\u{0080}", b"&#128;");
+        encode_gbk("\u{E7C7}", b"&#59335;");
+        if !cfg!(miri) {
+            // Miri is too slow
+            encode_gbk("\u{2603}", b"&#9731;");
+            encode_gbk("\u{1F4A9}", b"&#128169;");
+            encode_gbk("\u{10FFFF}", b"&#1114111;");
+        }
+
+        // Edge cases
+        encode_gbk("\u{00F7}", b"\xA1\xC2");
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)] // Miri is too slow
+    fn test_gb18030_decode_all() {
+        let input = include_bytes!("test_data/gb18030_in.txt");
+        let expectation = include_str!("test_data/gb18030_in_ref.txt");
+        let (cow, had_errors) = GB18030.decode_without_bom_handling(input);
+        assert!(!had_errors, "Should not have had errors.");
+        assert_eq!(&cow[..], expectation);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)] // Miri is too slow
+    fn test_gb18030_encode_all() {
+        let input = include_str!("test_data/gb18030_out.txt");
+        let expectation = include_bytes!("test_data/gb18030_out_ref.txt");
+        let (cow, encoding, had_errors) = GB18030.encode(input);
+        assert!(!had_errors, "Should not have had errors.");
+        assert_eq!(encoding, GB18030);
+        assert_eq!(&cow[..], &expectation[..]);
+    }
+
+    #[test]
+    fn test_gb18030_encode_from_utf16_max_length() {
+        let mut output = [0u8; 20];
+        let mut encoder = GB18030.new_encoder();
+        {
+            let needed = encoder
+                .max_buffer_length_from_utf16_without_replacement(1)
+                .unwrap();
+            let (result, read, written) = encoder.encode_from_utf16_without_replacement(
+                &[0x3000],
+                &mut output[..needed],
+                true,
+            );
+            assert_eq!(result, EncoderResult::InputEmpty);
+            assert_eq!(read, 1);
+            assert_eq!(written, 2);
+            assert_eq!(output[0], 0xA1);
+            assert_eq!(output[1], 0xA1);
+        }
+    }
+}