| // 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; |
| |
| enum EucJpPending { |
| None, |
| Jis0208Lead(u8), |
| Jis0212Shift, |
| Jis0212Lead(u8), |
| HalfWidthKatakana, |
| } |
| |
| impl EucJpPending { |
| fn is_none(&self) -> bool { |
| match *self { |
| EucJpPending::None => true, |
| _ => false, |
| } |
| } |
| |
| fn count(&self) -> usize { |
| match *self { |
| EucJpPending::None => 0, |
| EucJpPending::Jis0208Lead(_) |
| | EucJpPending::Jis0212Shift |
| | EucJpPending::HalfWidthKatakana => 1, |
| EucJpPending::Jis0212Lead(_) => 2, |
| } |
| } |
| } |
| |
| pub struct EucJpDecoder { |
| pending: EucJpPending, |
| } |
| |
| impl EucJpDecoder { |
| pub fn new() -> VariantDecoder { |
| VariantDecoder::EucJp(EucJpDecoder { |
| pending: EucJpPending::None, |
| }) |
| } |
| |
| pub fn in_neutral_state(&self) -> bool { |
| self.pending.is_none() |
| } |
| |
| fn plus_one_if_lead(&self, byte_length: usize) -> Option<usize> { |
| byte_length.checked_add(if self.pending.is_none() { 0 } else { 1 }) |
| } |
| |
| pub fn max_utf16_buffer_length(&self, byte_length: usize) -> Option<usize> { |
| self.plus_one_if_lead(byte_length) |
| } |
| |
| pub fn max_utf8_buffer_length_without_replacement(&self, byte_length: usize) -> Option<usize> { |
| // worst case: 2 to 3 |
| let len = self.plus_one_if_lead(byte_length); |
| checked_add(2, checked_add_opt(len, checked_div(checked_add(1, len), 2))) |
| } |
| |
| pub fn max_utf8_buffer_length(&self, byte_length: usize) -> Option<usize> { |
| checked_mul(3, self.plus_one_if_lead(byte_length)) |
| } |
| |
| euc_jp_decoder_functions!( |
| { |
| let trail_minus_offset = byte.wrapping_sub(0xA1); |
| // Fast-track Hiragana (60% according to Lunde) |
| // and Katakana (10% acconding to Lunde). |
| if jis0208_lead_minus_offset == 0x03 && trail_minus_offset < 0x53 { |
| // Hiragana |
| handle.write_upper_bmp(0x3041 + u16::from(trail_minus_offset)) |
| } else if jis0208_lead_minus_offset == 0x04 && trail_minus_offset < 0x56 { |
| // Katakana |
| handle.write_upper_bmp(0x30A1 + u16::from(trail_minus_offset)) |
| } else if trail_minus_offset > (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(), |
| ); |
| } else { |
| let pointer = mul_94(jis0208_lead_minus_offset) + usize::from(trail_minus_offset); |
| let level1_pointer = pointer.wrapping_sub(1410); |
| if level1_pointer < JIS0208_LEVEL1_KANJI.len() { |
| handle.write_upper_bmp(JIS0208_LEVEL1_KANJI[level1_pointer]) |
| } else { |
| let level2_pointer = pointer.wrapping_sub(4418); |
| if level2_pointer < JIS0208_LEVEL2_AND_ADDITIONAL_KANJI.len() { |
| handle.write_upper_bmp(JIS0208_LEVEL2_AND_ADDITIONAL_KANJI[level2_pointer]) |
| } else { |
| let ibm_pointer = pointer.wrapping_sub(8272); |
| if ibm_pointer < IBM_KANJI.len() { |
| handle.write_upper_bmp(IBM_KANJI[ibm_pointer]) |
| } else if let Some(bmp) = jis0208_symbol_decode(pointer) { |
| handle.write_bmp_excl_ascii(bmp) |
| } else if let Some(bmp) = jis0208_range_decode(pointer) { |
| handle.write_bmp_excl_ascii(bmp) |
| } else { |
| return ( |
| DecoderResult::Malformed(2, 0), |
| unread_handle_trail.consumed(), |
| handle.written(), |
| ); |
| } |
| } |
| } |
| } |
| }, |
| { |
| // If lead is between 0xA1 and 0xFE, inclusive, |
| // subtract 0xA1. |
| let jis0212_lead_minus_offset = lead.wrapping_sub(0xA1); |
| if jis0212_lead_minus_offset > (0xFE - 0xA1) { |
| if lead < 0x80 { |
| return ( |
| DecoderResult::Malformed(1, 0), |
| unread_handle_jis0212.unread(), |
| handle.written(), |
| ); |
| } |
| return ( |
| DecoderResult::Malformed(2, 0), |
| unread_handle_jis0212.consumed(), |
| handle.written(), |
| ); |
| } |
| jis0212_lead_minus_offset |
| }, |
| { |
| // If trail is between 0xA1 and 0xFE, inclusive, |
| // subtract 0xA1. |
| let trail_minus_offset = byte.wrapping_sub(0xA1); |
| if trail_minus_offset > (0xFE - 0xA1) { |
| if byte < 0x80 { |
| return ( |
| DecoderResult::Malformed(2, 0), |
| unread_handle_trail.unread(), |
| handle.written(), |
| ); |
| } |
| return ( |
| DecoderResult::Malformed(3, 0), |
| unread_handle_trail.consumed(), |
| handle.written(), |
| ); |
| } |
| let pointer = mul_94(jis0212_lead_minus_offset) + usize::from(trail_minus_offset); |
| let pointer_minus_kanji = pointer.wrapping_sub(1410); |
| if pointer_minus_kanji < JIS0212_KANJI.len() { |
| handle.write_upper_bmp(JIS0212_KANJI[pointer_minus_kanji]) |
| } else if let Some(bmp) = jis0212_accented_decode(pointer) { |
| handle.write_bmp_excl_ascii(bmp) |
| } else { |
| let pointer_minus_upper_cyrillic = pointer.wrapping_sub(597); |
| if pointer_minus_upper_cyrillic <= (607 - 597) { |
| handle.write_mid_bmp(0x0402 + pointer_minus_upper_cyrillic as u16) |
| } else { |
| let pointer_minus_lower_cyrillic = pointer.wrapping_sub(645); |
| if pointer_minus_lower_cyrillic <= (655 - 645) { |
| handle.write_mid_bmp(0x0452 + pointer_minus_lower_cyrillic as u16) |
| } else { |
| return ( |
| DecoderResult::Malformed(3, 0), |
| unread_handle_trail.consumed(), |
| handle.written(), |
| ); |
| } |
| } |
| } |
| }, |
| { |
| // If trail is between 0xA1 and 0xDF, inclusive, |
| // subtract 0xA1 and map to half-width Katakana. |
| let trail_minus_offset = byte.wrapping_sub(0xA1); |
| if trail_minus_offset > (0xDF - 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(), |
| ); |
| } |
| handle.write_upper_bmp(0xFF61 + u16::from(trail_minus_offset)) |
| }, |
| self, |
| non_ascii, |
| jis0208_lead_minus_offset, |
| byte, |
| unread_handle_trail, |
| jis0212_lead_minus_offset, |
| lead, |
| unread_handle_jis0212, |
| source, |
| handle |
| ); |
| } |
| |
| #[cfg(feature = "fast-kanji-encode")] |
| #[inline(always)] |
| fn encode_kanji(bmp: u16) -> Option<(u8, u8)> { |
| jis0208_kanji_euc_jp_encode(bmp) |
| } |
| |
| #[cfg(not(feature = "fast-kanji-encode"))] |
| #[inline(always)] |
| fn encode_kanji(bmp: u16) -> Option<(u8, u8)> { |
| if 0x4EDD == bmp { |
| // Ideograph on the symbol row! |
| Some((0xA1, 0xB8)) |
| } else if let Some((lead, trail)) = jis0208_level1_kanji_euc_jp_encode(bmp) { |
| Some((lead, trail)) |
| } else if let Some(pos) = jis0208_level2_and_additional_kanji_encode(bmp) { |
| let lead = (pos / 94) + 0xD0; |
| let trail = (pos % 94) + 0xA1; |
| Some((lead as u8, trail as u8)) |
| } else if let Some(pos) = position(&IBM_KANJI[..], bmp) { |
| let lead = (pos / 94) + 0xF9; |
| let trail = (pos % 94) + 0xA1; |
| Some((lead as u8, trail as u8)) |
| } else { |
| None |
| } |
| } |
| |
| pub struct EucJpEncoder; |
| |
| impl EucJpEncoder { |
| pub fn new(encoding: &'static Encoding) -> Encoder { |
| Encoder::new(encoding, VariantEncoder::EucJp(EucJpEncoder)) |
| } |
| |
| pub fn max_buffer_length_from_utf16_without_replacement( |
| &self, |
| u16_length: usize, |
| ) -> Option<usize> { |
| u16_length.checked_mul(2) |
| } |
| |
| pub fn max_buffer_length_from_utf8_without_replacement( |
| &self, |
| byte_length: usize, |
| ) -> Option<usize> { |
| byte_length.checked_add(1) |
| } |
| |
| ascii_compatible_bmp_encoder_functions!( |
| { |
| // Lunde says 60% Hiragana, 30% Kanji, 10% Katakana |
| let bmp_minus_hiragana = bmp.wrapping_sub(0x3041); |
| if bmp_minus_hiragana < 0x53 { |
| handle.write_two(0xA4, 0xA1 + bmp_minus_hiragana as u8) |
| } else if in_inclusive_range16(bmp, 0x4E00, 0x9FA0) { |
| if let Some((lead, trail)) = encode_kanji(bmp) { |
| handle.write_two(lead, trail) |
| } else { |
| return ( |
| EncoderResult::unmappable_from_bmp(bmp), |
| source.consumed(), |
| handle.written(), |
| ); |
| } |
| } else { |
| let bmp_minus_katakana = bmp.wrapping_sub(0x30A1); |
| if bmp_minus_katakana < 0x56 { |
| handle.write_two(0xA5, 0xA1 + bmp_minus_katakana as u8) |
| } else { |
| let bmp_minus_space = bmp.wrapping_sub(0x3000); |
| if bmp_minus_space < 3 { |
| // fast-track common punctuation |
| handle.write_two(0xA1, 0xA1 + bmp_minus_space as u8) |
| } else if bmp == 0xA5 { |
| handle.write_one(0x5Cu8) |
| } else if bmp == 0x203E { |
| handle.write_one(0x7Eu8) |
| } else if in_inclusive_range16(bmp, 0xFF61, 0xFF9F) { |
| handle.write_two(0x8Eu8, (bmp - (0xFF61 - 0xA1)) as u8) |
| } else if bmp == 0x2212 { |
| handle.write_two(0xA1u8, 0xDDu8) |
| } else if let Some(pointer) = jis0208_range_encode(bmp) { |
| let lead = (pointer / 94) + 0xA1; |
| let trail = (pointer % 94) + 0xA1; |
| handle.write_two(lead as u8, trail as u8) |
| } else if in_inclusive_range16(bmp, 0xFA0E, 0xFA2D) |
| || bmp == 0xF929 |
| || bmp == 0xF9DC |
| { |
| // Guaranteed to be found in IBM_KANJI |
| let pos = position(&IBM_KANJI[..], bmp).unwrap(); |
| let lead = (pos / 94) + 0xF9; |
| let trail = (pos % 94) + 0xA1; |
| handle.write_two(lead as u8, trail as u8) |
| } else if let Some(pointer) = ibm_symbol_encode(bmp) { |
| let lead = (pointer / 94) + 0xA1; |
| let trail = (pointer % 94) + 0xA1; |
| handle.write_two(lead as u8, trail as u8) |
| } else if let Some(pointer) = jis0208_symbol_encode(bmp) { |
| let lead = (pointer / 94) + 0xA1; |
| let trail = (pointer % 94) + 0xA1; |
| handle.write_two(lead as u8, trail as u8) |
| } else { |
| return ( |
| EncoderResult::unmappable_from_bmp(bmp), |
| source.consumed(), |
| handle.written(), |
| ); |
| } |
| } |
| } |
| }, |
| bmp, |
| 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(test)] |
| mod tests { |
| use super::super::testing::*; |
| use super::super::*; |
| |
| fn decode_euc_jp(bytes: &[u8], expect: &str) { |
| decode(EUC_JP, bytes, expect); |
| } |
| |
| fn encode_euc_jp(string: &str, expect: &[u8]) { |
| encode(EUC_JP, string, expect); |
| } |
| |
| #[test] |
| fn test_euc_jp_decode() { |
| // Empty |
| decode_euc_jp(b"", &""); |
| |
| // ASCII |
| decode_euc_jp(b"\x61\x62", "\u{0061}\u{0062}"); |
| |
| // Half-width |
| decode_euc_jp(b"\x8E\xA1", "\u{FF61}"); |
| decode_euc_jp(b"\x8E\xDF", "\u{FF9F}"); |
| decode_euc_jp(b"\x8E\xA0", "\u{FFFD}"); |
| decode_euc_jp(b"\x8E\xE0", "\u{FFFD}"); |
| decode_euc_jp(b"\x8E\xFF", "\u{FFFD}"); |
| decode_euc_jp(b"\x8E", "\u{FFFD}"); |
| |
| // JIS 0212 |
| decode_euc_jp(b"\x8F\xA1\xA1", "\u{FFFD}"); |
| decode_euc_jp(b"\x8F\xA2\xAF", "\u{02D8}"); |
| decode_euc_jp(b"\x8F\xA2\xFF", "\u{FFFD}"); |
| decode_euc_jp(b"\x8F\xA1", "\u{FFFD}"); |
| decode_euc_jp(b"\x8F", "\u{FFFD}"); |
| |
| // JIS 0208 |
| decode_euc_jp(b"\xA1\xA1", "\u{3000}"); |
| decode_euc_jp(b"\xA1\xA0", "\u{FFFD}"); |
| decode_euc_jp(b"\xFC\xFE", "\u{FF02}"); |
| decode_euc_jp(b"\xFE\xFE", "\u{FFFD}"); |
| decode_euc_jp(b"\xA1", "\u{FFFD}"); |
| |
| // Bad leads |
| decode_euc_jp(b"\xFF\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\xA0\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x80\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x81\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x82\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x83\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x84\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x85\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x86\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x87\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x88\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x89\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x8A\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x8B\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x8C\xA1\xA1", "\u{FFFD}\u{3000}"); |
| decode_euc_jp(b"\x8D\xA1\xA1", "\u{FFFD}\u{3000}"); |
| |
| // Bad ASCII trail |
| decode_euc_jp(b"\xA1\x40", "\u{FFFD}\u{0040}"); |
| } |
| |
| #[test] |
| fn test_euc_jp_encode() { |
| // Empty |
| encode_euc_jp("", b""); |
| |
| // ASCII |
| encode_euc_jp("\u{0061}\u{0062}", b"\x61\x62"); |
| |
| // Exceptional code points |
| encode_euc_jp("\u{00A5}", b"\x5C"); |
| encode_euc_jp("\u{203E}", b"\x7E"); |
| encode_euc_jp("\u{2212}", b"\xA1\xDD"); |
| |
| // Half-width |
| encode_euc_jp("\u{FF61}", b"\x8E\xA1"); |
| encode_euc_jp("\u{FF9F}", b"\x8E\xDF"); |
| |
| // JIS 0212 |
| encode_euc_jp("\u{02D8}", b"˘"); |
| |
| // JIS 0208 |
| encode_euc_jp("\u{3000}", b"\xA1\xA1"); |
| encode_euc_jp("\u{FF02}", b"\xFC\xFE"); |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_jis0208_decode_all() { |
| let input = include_bytes!("test_data/jis0208_in.txt"); |
| let expectation = include_str!("test_data/jis0208_in_ref.txt"); |
| let (cow, had_errors) = EUC_JP.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_jis0208_encode_all() { |
| let input = include_str!("test_data/jis0208_out.txt"); |
| let expectation = include_bytes!("test_data/jis0208_out_ref.txt"); |
| let (cow, encoding, had_errors) = EUC_JP.encode(input); |
| assert!(!had_errors, "Should not have had errors."); |
| assert_eq!(encoding, EUC_JP); |
| assert_eq!(&cow[..], &expectation[..]); |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_jis0212_decode_all() { |
| let input = include_bytes!("test_data/jis0212_in.txt"); |
| let expectation = include_str!("test_data/jis0212_in_ref.txt"); |
| let (cow, had_errors) = EUC_JP.decode_without_bom_handling(input); |
| assert!(had_errors, "Should have had errors."); |
| assert_eq!(&cow[..], expectation); |
| } |
| } |
