mirror of
https://github.com/oven-sh/bun
synced 2026-02-27 12:07:20 +01:00
9fd5b20aa3
## Summary
This PR integrates WebKit's text codec implementations into Bun's
TextDecoder, adding support for 24 additional character encodings beyond
the native UTF-8, UTF-16, and Latin1.
Fixes https://github.com/oven-sh/bun/issues/11564
## What's New
### Supported Encodings (24 total)
- **11 single-byte encodings**: IBM866, ISO-8859-3/6/7/8/8-I, KOI8-U,
windows-874/1253/1255/1257
- **7 CJK encodings**: Big5, EUC-JP, ISO-2022-JP, Shift_JIS, EUC-KR,
GBK, GB18030
- **2 special encodings**: x-user-defined, replacement
### Implementation Details
- Integrated WebKit's text codec C++ implementations
- Generated static encoding tables from WHATWG spec (no ICU dependency)
- Created C++ wrapper for Zig/C++ interop
- All encoding aliases are supported (e.g., `sjis` → `shift_jis`)
- Proper whitespace trimming for encoding labels
## Testing
- ✅ Added comprehensive tests for all supported encodings
- ✅ Passes Web Platform Tests for single-byte decoders
- ✅ Passes Web Platform Tests for encoding labels
- ✅ All 2,227 tests pass
## Test Output
```
bun test v1.2.19 (9feaab47)
2207 pass
0 fail
5012 expect() calls
Ran 2207 tests across 1 file. [899.00ms]
```
## Not Included
The following encodings were not added due to ICU data loading
constraints:
- ISO-8859-2, 4, 5, 10, 13, 14, 15, 16
- Windows-1250, 1251, 1254, 1256, 1258
- KOI8-R, macintosh, x-mac-cyrillic
## Example Usage
```javascript
// CJK encodings
const decoder = new TextDecoder("shift_jis");
const bytes = new Uint8Array([0x82, 0xb1, 0x82, 0xf1]);
console.log(decoder.decode(bytes)); // "こん"
// Single-byte encodings
const greekDecoder = new TextDecoder("iso-8859-7");
const greekBytes = new Uint8Array([0xC3, 0xe5, 0xe9, 0xdc]);
console.log(greekDecoder.decode(greekBytes)); // "Γειά"
```
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
Co-authored-by: Claude <claude@anthropic.ai>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
72 lines
2.8 KiB
C++
72 lines
2.8 KiB
C++
#include "root.h"
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/*
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* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// config.h removed - not needed in Bun
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#include "TextCodec.h"
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#include <unicode/uchar.h>
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#include <wtf/TZoneMallocInlines.h>
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#include <wtf/text/WTFString.h>
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#include <wtf/unicode/CharacterNames.h>
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#include <array>
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#include <cstdio>
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namespace PAL {
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WTF_MAKE_TZONE_ALLOCATED_IMPL(TextCodec);
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std::span<char> TextCodec::getUnencodableReplacement(char32_t codePoint, UnencodableHandling handling, UnencodableReplacementArray& replacement)
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{
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ASSERT(!(codePoint > UCHAR_MAX_VALUE));
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// The Encoding Standard doesn't have surrogate code points in the input, but that would require
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// scanning and potentially manipulating inputs ahead of time. Instead handle them at the last
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// possible point.
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if (U_IS_SURROGATE(codePoint))
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codePoint = replacementCharacter;
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switch (handling) {
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case UnencodableHandling::Entities: {
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int count = SAFE_SPRINTF(std::span { replacement }, "&#%u;", static_cast<unsigned>(codePoint));
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ASSERT(count >= 0);
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return std::span { replacement }.first(std::max<int>(0, count));
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}
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case UnencodableHandling::URLEncodedEntities: {
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int count = SAFE_SPRINTF(std::span { replacement }, "%%26%%23%u%%3B", static_cast<unsigned>(codePoint));
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ASSERT(count >= 0);
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return std::span { replacement }.first(std::max<int>(0, count));
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}
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}
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ASSERT_NOT_REACHED();
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replacement[0] = '\0';
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return std::span { replacement }.first(0);
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}
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} // namespace PAL
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