在mac

Question

我正在尝试将文本转换为十六进制字符，以便在mac上构建dmg 由于十六进制似乎没有在mac和windows上引用ascii字符的相同字符，因此我被烧毁了。 127.似乎基本的javascript函数只给出了“windows”翻译 我需要将“mac”翻译为十六进制......

到目前为止，我正在这样做：

const fileData = await parseJson(readFile(item.file, "utf-8"))
const buttonsStr = labelToHex(fileData.lang)

function labelToHex(label: string) {
  return hexEncode(label).toString().toUpperCase()
}

function hexEncode(str: string) {
  let i
  let result = ""

  for (i = 0; i < str.length; i++) {
    result += unicodeToHex(str.charCodeAt(i))
  }

  return result
}

function unicodeToHex(unicode: number) {
  const hex = unicode.toString(16)
  return ("0" + hex).slice(-2)
}

如果我传入：Françaiséàè
我明白了： 46 72 61 6e e7 61 69 73 e9 e0 e8
但当我读回来时，我得到了：FranÀaisÈ‡Ë 我期待得到： 46 72 61 6e 8d 61 69 73 8E 88 8f
以便回读： 46 72 61 6e e7 61 69 73 e9 e0 e8

这对应于那些表：
https://academic.evergreen.edu/projects/biophysics/technotes/program/ascii_ext-mac.htm https://academic.evergreen.edu/projects/biophysics/technotes/program/ascii_ext-pc.htm

尽管如此，我还是找不到基于操作系统转换为十六进制的npm软件包，或者我还没有发现一些模糊不清的js函数？ 我的想法已经用完了，而且即将开始：

function unicodeToHex(unicode: number) {
  if (unicode < 128) {
    const hex = unicode.toString(16)
    return ("0" + hex).slice(-2)
  }

  if (unicode === 233) { return "8E" }//é
  if (unicode === 224) { return "88" }//à
  if (unicode === 232) { return "8F" }//è

  return "3F" //?
}

但我真的想避免这样......

Answer 1

我已经找到了办法，感谢代码页，正如@Keith所述

const cptable = require("codepage")
function hexEncode(str: string, lang: string, langWithRegion: string) {
  let code
  let hex
  let i
  const macCodePages = getMacCodePage(lang, langWithRegion)
  let result = ""

  for (i = 0; i < str.length; i++) {
    try {
      code = getMacCharCode(str, i, macCodePages)
      if (code === undefined) {
        hex = "3F" //?
      } else {
        hex = code.toString(16)
      }

      result += hex
    } catch (e) {
      debug("there was a problem while trying to convert a char to hex: " + e)
      result += "3F" //?
    }
  }

  return result
}

function getMacCodePage(lang: string, langWithRegion: string) {
  switch (lang) {
    case "ja": //japanese
      return [10001] //Apple Japanese
    case "zh": //chinese
      if (langWithRegion === "zh_CN") {
        return [10008] //Apple Simplified Chinese (GB 2312)
      }
      return [10002] //Apple Traditional Chinese (Big5)
    case "ko": //korean
      return [10003] //Apple Korean
    case "ar": //arabic
    case "ur": //urdu
      return [10004] //Apple Arabic
    case "he": //hebrew
      return [10005] //Apple Hebrew
    case "el": //greek
    case "elc": //greek
      return [10006] //Apple Greek
    case "ru": //russian
    case "be": //belarussian
    case "sr": //serbian
    case "bg": //bulgarian
    case "uz": //uzbek
      return [10007] //Apple Macintosh Cyrillic
    case "ro": //romanian
      return [10010] //Apple Romanian
    case "uk": //ukrainian
      return [10017] //Apple Ukrainian
    case "th": //thai
      return [10021] //Apple Thai
    case "et": //estonian
    case "lt": //lithuanian
    case "lv": //latvian
    case "pl": //polish
    case "hu": //hungarian
    case "cs": //czech
    case "sk": //slovak
      return [10029] //Apple Macintosh Central Europe
    case "is": //icelandic
    case "fo": //faroese
      return [10079] //Apple Icelandic
    case "tr": //turkish
      return [10081] //Apple Turkish
    case "hr": //croatian
    case "sl": //slovenian
      return [10082] //Apple Croatian
    default:
      return [10000] //Apple Macintosh Roman
  }
}

function getMacCharCode(str: string, i: number, macCodePages: any) {
  let code = str.charCodeAt(i)
  let j
  if (code < 128) {
    code = str.charCodeAt(i)
  }
  else if (code < 256) {
    //codepage 10000 = mac OS Roman
    code = cptable[10000].enc[str[i]]
  }
  else {
    for (j = 0; j < macCodePages.length; j++) {
      code = cptable[macCodePages[j]].enc[str[i]]
      if (code !== undefined) {
        break
      }
    }
  }

  return code
}