diff options
Diffstat (limited to 'testing/web-platform/tests/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-decoder.js')
| -rw-r--r-- | testing/web-platform/tests/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-decoder.js | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/testing/web-platform/tests/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-decoder.js b/testing/web-platform/tests/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-decoder.js new file mode 100644 index 0000000000..f4bcd863ef --- /dev/null +++ b/testing/web-platform/tests/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-decoder.js @@ -0,0 +1,206 @@ +function dec2char(n) { + // converts a decimal number to a Unicode character + // n: the dec codepoint value to be converted + if (n <= 0xffff) { + out = String.fromCharCode(n); + } else if (n <= 0x10ffff) { + n -= 0x10000; + out = + String.fromCharCode(0xd800 | (n >> 10)) + + String.fromCharCode(0xdc00 | (n & 0x3ff)); + } else out = "dec2char error: Code point out of range: " + n; + return out; +} + +function getIndexPtr(cp, index) { + for (p = 0; p < index.length; p++) { + if (index[p] == cp) { + return p; + } + } + return null; +} + +function iso2022jpDecoder(stream) { + stream = stream.replace(/%/g, " "); + stream = stream.replace(/[\s]+/g, " ").trim(); + var bytes = stream.split(" "); + for (var i = 0; i < bytes.length; i++) bytes[i] = parseInt(bytes[i], 16); + var endofstream = 2000000; + //bytes.push(endofstream) + var out = ""; + var decState = "ascii"; + var outState = "ascii"; + var isoLead = 0x00; + var outFlag = false; + var cp, ptr, lead; + + var finished = false; + while (!finished) { + if (bytes.length == 0) byte = endofstream; + else var byte = bytes.shift(); + //byte = bytes.shift() + + switch (decState) { + case "ascii": + if (byte == 0x1b) { + decState = "escStart"; + continue; + } else if ( + byte >= 0x00 && + byte <= 0x7f && + byte !== 0x0e && + byte !== 0x0f && + byte !== 0x1b + ) { + outFlag = false; + out += dec2char(byte); + continue; + } else if (byte == endofstream) { + finished = true; + continue; + } else { + outFlag = false; + out += "�"; + continue; + } + break; + case "roman": + if (byte == 0x1b) { + decState = "escStart"; + continue; + } else if (byte == 0x5c) { + outFlag = false; + out += dec2char(0xa5); + continue; + } else if (byte == 0x7e) { + outFlag = false; + out += dec2char(0x203e); + continue; + } else if ( + byte >= 0x00 && + byte <= 0x7f && + byte !== 0x0e && + byte !== 0x0f && + byte !== 0x1b && + byte !== 0x5c && + byte !== 0x7e + ) { + outFlag = false; + out += dec2char(byte); + continue; + } else if (byte == endofstream) { + finished = true; + continue; + } else { + outFlag = false; + out += "�"; + continue; + } + break; + case "katakana": + if (byte == 0x1b) { + decState = "escStart"; + continue; + } else if (byte >= 0x21 && byte <= 0x5f) { + outFlag = false; + out += dec2char(0xff61 + byte - 0x21); + continue; + } else if (byte == endofstream) { + finished = true; + continue; + } else { + outFlag = false; + out += "�"; + continue; + } + break; + case "leadbyte": + if (byte == 0x1b) { + decState = "escStart"; + continue; + } else if (byte >= 0x21 && byte <= 0x7e) { + outFlag = false; + isoLead = byte; + decState = "trailbyte"; + continue; + } else if (byte == endofstream) { + finished = true; + continue; + } else { + outFlag = false; + out += "�"; + continue; + } + break; + case "trailbyte": + if (byte == 0x1b) { + decState = "escStart"; + out += "�"; + continue; + } else if (byte >= 0x21 && byte <= 0x7e) { + decState = "leadbyte"; + ptr = (isoLead - 0x21) * 94 + byte - 0x21; + cp = jis0208[ptr]; + if (cp == null) { + out += "�"; + continue; + } + out += dec2char(cp); + continue; + } else if (byte == endofstream) { + decState = "leadbyte"; + bytes.unshift(byte); + out += "�"; + continue; + } else { + decState = "leadbyte"; + out += "�"; + continue; + } + break; + case "escStart": + if (byte == 0x24 || byte == 0x28) { + isoLead = byte; + decState = "escape"; + continue; + } else { + bytes.unshift(byte); + outFlag = false; + decState = outState; + out += "�"; + continue; + } + break; + case "escape": + lead = isoLead; + isoLead = 0x00; + var state = null; + if (lead == 0x28 && byte == 0x42) state = "ascii"; + if (lead == 0x28 && byte == 0x4a) state = "roman"; + if (lead == 0x28 && byte == 0x49) state = "katakana"; + if (lead == 0x24 && (byte == 0x40 || byte == 0x42)) + state = "leadbyte"; + if (state != null) { + decState = state; + outState = state; + var outputflag = false; + outputflag = outFlag; + outFlag = true; + if (outputflag == false) continue; + else { + out += "�"; + continue; + } + } + // Prepend the sequence (lead, byte) to the stream + bytes.unshift(lead, byte); + outFlag = false; + decState = outState; + out += "�"; + continue; + break; + } + } + return out; +} |