Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 427 insertions, 0 deletions

diff --git a/third_party/rust/encoding_rs/src/big5.rs b/third_party/rust/encoding_rs/src/big5.rs
new file mode 100644
index 0000000000..5c72c5ef9c
--- /dev/null
+++ b/third_party/rust/encoding_rs/src/big5.rs
@@ -0,0 +1,427 @@
+// 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_range32;
+
+pub struct Big5Decoder {
+    lead: Option<u8>,
+}
+
+impl Big5Decoder {
+    pub fn new() -> VariantDecoder {
+        VariantDecoder::Big5(Big5Decoder { lead: None })
+    }
+
+    pub fn in_neutral_state(&self) -> bool {
+        self.lead.is_none()
+    }
+
+    fn plus_one_if_lead(&self, byte_length: usize) -> Option<usize> {
+        byte_length.checked_add(match self.lead {
+            None => 0,
+            Some(_) => 1,
+        })
+    }
+
+    pub fn max_utf16_buffer_length(&self, byte_length: usize) -> Option<usize> {
+        // If there is a lead but the next byte isn't a valid trail, an
+        // error is generated for the lead (+1). Then another iteration checks
+        // space, which needs +1 to account for the possibility of astral
+        // output or combining pair.
+        checked_add(1, self.plus_one_if_lead(byte_length))
+    }
+
+    pub fn max_utf8_buffer_length_without_replacement(&self, byte_length: usize) -> Option<usize> {
+        // No need to account for REPLACEMENT CHARACTERS.
+        // Cases:
+        // ASCII: 1 to 1
+        // Valid pair: 2 to 2, 2 to 3 or 2 to 4, i.e. worst case 2 to 4
+        // lead set and first byte is trail: 1 to 4 worst case
+        //
+        // When checking for space for the last byte:
+        // no lead: the last byte must be ASCII (or fatal error): 1 to 1
+        // lead set: space for 4 bytes was already checked when reading the
+        // lead, hence the last lead and the last trail together are worst
+        // case 2 to 4.
+        //
+        // If lead set and the input is a single trail byte, the worst-case
+        // output is 4, so we need to add one before multiplying if lead is
+        // set.
+        //
+        // Finally, add two so that if input is non-zero, the output is at
+        // least 4.
+        checked_add(2, checked_mul(2, self.plus_one_if_lead(byte_length)))
+    }
+
+    pub fn max_utf8_buffer_length(&self, byte_length: usize) -> Option<usize> {
+        // If there is a lead but the next byte isn't a valid trail, an
+        // error is generated for the lead (+(1*3)). Then another iteration
+        // checks space, which needs +3 to account for the possibility of astral
+        // output or combining pair. In between start and end, the worst case
+        // is that every byte is bad: *3.
+        checked_add(3, checked_mul(3, self.plus_one_if_lead(byte_length)))
+    }
+
+    ascii_compatible_two_byte_decoder_functions!(
+        {
+            // If lead 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) {
+                return (DecoderResult::Malformed(1, 0),
+                        source.consumed(),
+                        handle.written());
+            }
+            non_ascii_minus_offset
+        },
+        {
+            // If trail is between 0x40 and 0x7E, inclusive,
+            // subtract offset 0x40. Else if trail is
+            // between 0xA1 and 0xFE, inclusive, subtract
+            // offset 0x62.
+            // TODO: Find out which range is more probable.
+            let mut trail_minus_offset =
+                byte.wrapping_sub(0x40);
+            if trail_minus_offset > (0x7E - 0x40) {
+                let trail_minus_range_start =
+                    byte.wrapping_sub(0xA1);
+                if trail_minus_range_start >
+                   (0xFE - 0xA1) {
+                    if byte < 0x80 {
+                        return (DecoderResult::Malformed(1, 0),
+                                unread_handle_trail.unread(),
+                                handle.written());
+                    }
+                    return (DecoderResult::Malformed(2, 0),
+                            unread_handle_trail.consumed(),
+                            handle.written());
+                }
+                trail_minus_offset = byte - 0x62;
+            }
+            let pointer = lead_minus_offset as usize *
+                          157usize +
+                          trail_minus_offset as usize;
+            let rebased_pointer = pointer.wrapping_sub(942);
+            let low_bits = big5_low_bits(rebased_pointer);
+            if low_bits == 0 {
+                match pointer {
+                    1133 => {
+                        handle.write_big5_combination(0x00CAu16,
+                                                      0x0304u16)
+                    }
+                    1135 => {
+                        handle.write_big5_combination(0x00CAu16,
+                                                      0x030Cu16)
+                    }
+                    1164 => {
+                        handle.write_big5_combination(0x00EAu16,
+                                                      0x0304u16)
+                    }
+                    1166 => {
+                        handle.write_big5_combination(0x00EAu16,
+                                                      0x030Cu16)
+                    }
+                    _ => {
+                        if byte < 0x80 {
+                            return (DecoderResult::Malformed(1, 0),
+                                    unread_handle_trail.unread(),
+                                    handle.written());
+                        }
+                        return (DecoderResult::Malformed(2, 0),
+                                unread_handle_trail.consumed(),
+                                handle.written());
+                    }
+                }
+            } else if big5_is_astral(rebased_pointer) {
+                handle.write_astral(u32::from(low_bits) |
+                                    0x20000u32)
+            } else {
+                handle.write_bmp_excl_ascii(low_bits)
+            }
+        },
+        self,
+        non_ascii,
+        byte,
+        lead_minus_offset,
+        unread_handle_trail,
+        source,
+        handle,
+        'outermost,
+        copy_ascii_from_check_space_astral,
+        check_space_astral,
+        false);
+}
+
+pub struct Big5Encoder;
+
+impl Big5Encoder {
+    pub fn new(encoding: &'static Encoding) -> Encoder {
+        Encoder::new(encoding, VariantEncoder::Big5(Big5Encoder))
+    }
+
+    pub fn max_buffer_length_from_utf16_without_replacement(
+        &self,
+        u16_length: usize,
+    ) -> Option<usize> {
+        // Astral: 2 to 2
+        // ASCII: 1 to 1
+        // Other: 1 to 2
+        u16_length.checked_mul(2)
+    }
+
+    pub fn max_buffer_length_from_utf8_without_replacement(
+        &self,
+        byte_length: usize,
+    ) -> Option<usize> {
+        // Astral: 4 to 2
+        // Upper BMP: 3 to 2
+        // Lower BMP: 2 to 2
+        // ASCII: 1 to 1
+        byte_length.checked_add(1)
+    }
+
+    ascii_compatible_encoder_functions!(
+        {
+            // For simplicity, unified ideographs
+            // in the pointer range 11206...11212 are handled
+            // as Level 1 Hanzi.
+            if let Some((lead, trail)) = big5_level1_hanzi_encode(bmp) {
+                handle.write_two(lead, trail)
+            } else {
+                let pointer = if let Some(pointer) = big5_box_encode(bmp) {
+                    pointer
+                } else if let Some(pointer) = big5_other_encode(bmp) {
+                    pointer
+                } else {
+                    return (
+                        EncoderResult::unmappable_from_bmp(bmp),
+                        source.consumed(),
+                        handle.written(),
+                    );
+                };
+                let lead = pointer / 157 + 0x81;
+                let remainder = pointer % 157;
+                let trail = if remainder < 0x3F {
+                    remainder + 0x40
+                } else {
+                    remainder + 0x62
+                };
+                handle.write_two(lead as u8, trail as u8)
+            }
+        },
+        {
+            if in_inclusive_range32(astral as u32, 0x2008A, 0x2F8A6) {
+                if let Some(rebased_pointer) = big5_astral_encode(astral as u16) {
+                    // big5_astral_encode returns rebased pointer,
+                    // so adding 0x87 instead of 0x81.
+                    let lead = rebased_pointer / 157 + 0x87;
+                    let remainder = rebased_pointer % 157;
+                    let trail = if remainder < 0x3F {
+                        remainder + 0x40
+                    } else {
+                        remainder + 0x62
+                    };
+                    handle.write_two(lead as u8, trail as u8)
+                } else {
+                    return (
+                        EncoderResult::Unmappable(astral),
+                        source.consumed(),
+                        handle.written(),
+                    );
+                }
+            } else {
+                return (
+                    EncoderResult::Unmappable(astral),
+                    source.consumed(),
+                    handle.written(),
+                );
+            }
+        },
+        bmp,
+        astral,
+        self,
+        source,
+        handle,
+        copy_ascii_to_check_space_two,
+        check_space_two,
+        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_big5(bytes: &[u8], expect: &str) {
+        decode(BIG5, bytes, expect);
+    }
+
+    fn encode_big5(string: &str, expect: &[u8]) {
+        encode(BIG5, string, expect);
+    }
+
+    #[test]
+    fn test_big5_decode() {
+        // Empty
+        decode_big5(b"", &"");
+
+        // ASCII
+        decode_big5(&[0x61u8, 0x62u8], &"\u{0061}\u{0062}");
+
+        // Edge cases
+        decode_big5(&[0x87u8, 0x40u8], &"\u{43F0}");
+        decode_big5(&[0xFEu8, 0xFEu8], &"\u{79D4}");
+        decode_big5(&[0xFEu8, 0xFDu8], &"\u{2910D}");
+        decode_big5(&[0x88u8, 0x62u8], &"\u{00CA}\u{0304}");
+        decode_big5(&[0x88u8, 0x64u8], &"\u{00CA}\u{030C}");
+        decode_big5(&[0x88u8, 0x66u8], &"\u{00CA}");
+        decode_big5(&[0x88u8, 0xA3u8], &"\u{00EA}\u{0304}");
+        decode_big5(&[0x88u8, 0xA5u8], &"\u{00EA}\u{030C}");
+        decode_big5(&[0x88u8, 0xA7u8], &"\u{00EA}");
+        decode_big5(&[0x99u8, 0xD4u8], &"\u{8991}");
+        decode_big5(&[0x99u8, 0xD5u8], &"\u{27967}");
+        decode_big5(&[0x99u8, 0xD6u8], &"\u{8A29}");
+
+        // Edge cases surrounded with ASCII
+        decode_big5(
+            &[0x61u8, 0x87u8, 0x40u8, 0x62u8],
+            &"\u{0061}\u{43F0}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0xFEu8, 0xFEu8, 0x62u8],
+            &"\u{0061}\u{79D4}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0xFEu8, 0xFDu8, 0x62u8],
+            &"\u{0061}\u{2910D}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0x62u8, 0x62u8],
+            &"\u{0061}\u{00CA}\u{0304}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0x64u8, 0x62u8],
+            &"\u{0061}\u{00CA}\u{030C}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0x66u8, 0x62u8],
+            &"\u{0061}\u{00CA}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0xA3u8, 0x62u8],
+            &"\u{0061}\u{00EA}\u{0304}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0xA5u8, 0x62u8],
+            &"\u{0061}\u{00EA}\u{030C}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x88u8, 0xA7u8, 0x62u8],
+            &"\u{0061}\u{00EA}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x99u8, 0xD4u8, 0x62u8],
+            &"\u{0061}\u{8991}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x99u8, 0xD5u8, 0x62u8],
+            &"\u{0061}\u{27967}\u{0062}",
+        );
+        decode_big5(
+            &[0x61u8, 0x99u8, 0xD6u8, 0x62u8],
+            &"\u{0061}\u{8A29}\u{0062}",
+        );
+
+        // Bad sequences
+        decode_big5(&[0x80u8, 0x61u8], &"\u{FFFD}\u{0061}");
+        decode_big5(&[0xFFu8, 0x61u8], &"\u{FFFD}\u{0061}");
+        decode_big5(&[0xFEu8, 0x39u8], &"\u{FFFD}\u{0039}");
+        decode_big5(&[0x87u8, 0x66u8], &"\u{FFFD}\u{0066}");
+        decode_big5(&[0x81u8, 0x40u8], &"\u{FFFD}\u{0040}");
+        decode_big5(&[0x61u8, 0x81u8], &"\u{0061}\u{FFFD}");
+    }
+
+    #[test]
+    fn test_big5_encode() {
+        // Empty
+        encode_big5("", b"");
+
+        // ASCII
+        encode_big5("\u{0061}\u{0062}", b"\x61\x62");
+
+        if !cfg!(miri) {
+            // Miri is too slow
+            // Edge cases
+            encode_big5("\u{9EA6}\u{0061}", b"&#40614;\x61");
+            encode_big5("\u{2626B}\u{0061}", b"&#156267;\x61");
+            encode_big5("\u{3000}", b"\xA1\x40");
+            encode_big5("\u{20AC}", b"\xA3\xE1");
+            encode_big5("\u{4E00}", b"\xA4\x40");
+            encode_big5("\u{27607}", b"\xC8\xA4");
+            encode_big5("\u{FFE2}", b"\xC8\xCD");
+            encode_big5("\u{79D4}", b"\xFE\xFE");
+
+            // Not in index
+            encode_big5("\u{2603}\u{0061}", b"&#9731;\x61");
+        }
+
+        // duplicate low bits
+        encode_big5("\u{203B5}", b"\xFD\x6A");
+        encode_big5("\u{25605}", b"\xFE\x46");
+
+        // prefer last
+        encode_big5("\u{2550}", b"\xF9\xF9");
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)] // Miri is too slow
+    fn test_big5_decode_all() {
+        let input = include_bytes!("test_data/big5_in.txt");
+        let expectation = include_str!("test_data/big5_in_ref.txt");
+        let (cow, had_errors) = BIG5.decode_without_bom_handling(input);
+        assert!(had_errors, "Should have had errors.");
+        assert_eq!(&cow[..], expectation);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)] // Miri is too slow
+    fn test_big5_encode_all() {
+        let input = include_str!("test_data/big5_out.txt");
+        let expectation = include_bytes!("test_data/big5_out_ref.txt");
+        let (cow, encoding, had_errors) = BIG5.encode(input);
+        assert!(!had_errors, "Should not have had errors.");
+        assert_eq!(encoding, BIG5);
+        assert_eq!(&cow[..], &expectation[..]);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)] // Miri is too slow
+    fn test_big5_encode_from_two_low_surrogates() {
+        let expectation = b"&#65533;&#65533;";
+        let mut output = [0u8; 40];
+        let mut encoder = BIG5.new_encoder();
+        let (result, read, written, had_errors) =
+            encoder.encode_from_utf16(&[0xDC00u16, 0xDEDEu16], &mut output[..], true);
+        assert_eq!(result, CoderResult::InputEmpty);
+        assert_eq!(read, 2);
+        assert_eq!(written, expectation.len());
+        assert!(had_errors);
+        assert_eq!(&output[..written], expectation);
+    }
+}