# All files / src base64.ts

50% Statements 45/90
25% Branches 8/32
60% Functions 3/5
49.44% Lines 44/89

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     /* eslint-disable */

    export function utf8Encode(argString: any) {
      // http://kevin.vanzonneveld.net
      // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
      // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // +   improved by: sowberry
      // +    tweaked by: Jack
      // +   bugfixed by: Onno Marsman
      // +   improved by: Yves Sucaet
      // +   bugfixed by: Onno Marsman
      // +   bugfixed by: Ulrich
      // +   bugfixed by: Rafal Kukawski
      // +   improved by: kirilloid
      // +   bugfixed by: kirilloid
      // *     example 1: this.utf8Encode('Kevin van Zonneveld')
      // *     returns 1: 'Kevin van Zonneveld'

      Iif (argString === null || typeof argString === 'undefined') {
        return ''
      }

      let string = argString + '' // .replace(/\r\n/g, '\n').replace(/\r/g, '\n')
      let utftext = '',
        start,
        end,
        stringl = 0

      start = end = 0
      stringl = string.length
      for (let n = 0; n < stringl; n++) {
        let c1 = string.charCodeAt(n)
        let enc = null

        Eif (c1 < 128) {
          end++
        } else if (c1 > 127 && c1 < 2048) {
          enc = String.fromCharCode((c1 >> 6) | 192, (c1 & 63) | 128)
        } else if ((c1 & 0xf800 ^ 0xd800) > 0) {
          enc = String.fromCharCode(
            (c1 >> 12) | 224,
            ((c1 >> 6) & 63) | 128,
            (c1 & 63) | 128
          )
        } else {
          // surrogate pairs
          if ((c1 & 0xfc00 ^ 0xd800) > 0) {
            throw new RangeError('Unmatched trail surrogate at ' + n)
          }
          let c2 = string.charCodeAt(++n)
          if ((c2 & 0xfc00 ^ 0xdc00) > 0) {
            throw new RangeError('Unmatched lead surrogate at ' + (n - 1))
          }
          c1 = ((c1 & 0x3ff) << 10) + (c2 & 0x3ff) + 0x10000
          enc = String.fromCharCode(
            (c1 >> 18) | 240,
            ((c1 >> 12) & 63) | 128,
            ((c1 >> 6) & 63) | 128,
            (c1 & 63) | 128
          )
        }
        Iif (enc !== null) {
          if (end > start) {
            utftext += string.slice(start, end)
          }
          utftext += enc
          start = end = n + 1
        }
      }

      Eif (end > start) {
        utftext += string.slice(start, stringl)
      }

      return utftext
    }

    export function base64Encode(data: any) {
      // http://kevin.vanzonneveld.net
      // +   original by: Tyler Akins (http://rumkin.com)
      // +   improved by: Bayron Guevara
      // +   improved by: Thunder.m
      // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // +   bugfixed by: Pellentesque Malesuada
      // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // -    depends on: this.utf8Encode
      // *     example 1: this.base64Encode('Kevin van Zonneveld')
      // *     returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
      // mozilla has this native
      // - but breaks in 2.0.0.12!
      // if (typeof this.window['atob'] == 'function') {
      //    return atob(data)
      // }
      let b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
      let o1,
        o2,
        o3,
        h1,
        h2,
        h3,
        h4,
        bits,
        i = 0,
        ac = 0,
        enc = '',
        tmp_arr = []

      Iif (!data) {
        return data
      }

      data = utf8Encode(data + '')

      do {
        // pack three octets into four hexets
        o1 = data.charCodeAt(i++)
        o2 = data.charCodeAt(i++)
        o3 = data.charCodeAt(i++)

        bits = (o1 << 16) | (o2 << 8) | o3

        h1 = (bits >> 18) & 0x3f
        h2 = (bits >> 12) & 0x3f
        h3 = (bits >> 6) & 0x3f
        h4 = bits & 0x3f

        // use hexets to index into b64, and append result to encoded string
        tmp_arr[ac++] =
          b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4)
      } while (i < data.length)

      enc = tmp_arr.join('')

      switch (data.length % 3) {
        case 1:
          enc = enc.slice(0, -2) + '=='
          break
        case 2:
          enc = enc.slice(0, -1) + '='
          break
      }

      return enc
    }

    export function base64Decode(data: string) {
      // http://kevin.vanzonneveld.net
      // +   original by: Tyler Akins (http://rumkin.com)
      // +   improved by: Thunder.m
      // +      input by: Aman Gupta
      // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // +   bugfixed by: Onno Marsman
      // +   bugfixed by: Pellentesque Malesuada
      // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // +      input by: Brett Zamir (http://brett-zamir.me)
      // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
      // *     example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==')
      // *     returns 1: 'Kevin van Zonneveld'
      // mozilla has this native
      // - but breaks in 2.0.0.12!
      // if (typeof this.window['atob'] == 'function') {
      //    return atob(data)
      // }
      let b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
      let o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
          ac = 0,
          dec = '',
          tmp_arr = []

      if (!data) {
          return data
      }

      data += ''

      do { // unpack four hexets into three octets using index points in b64
          h1 = b64.indexOf(data.charAt(i++))
          h2 = b64.indexOf(data.charAt(i++))
          h3 = b64.indexOf(data.charAt(i++))
          h4 = b64.indexOf(data.charAt(i++))

          bits = h1 << 18 | h2 << 12 | h3 << 6 | h4

          o1 = bits >> 16 & 0xff
          o2 = bits >> 8 & 0xff
          o3 = bits & 0xff

          if (h3 === 64) {
              tmp_arr[ac++] = String.fromCharCode(o1)
          } else if (h4 === 64) {
              tmp_arr[ac++] = String.fromCharCode(o1, o2)
          } else {
              tmp_arr[ac++] = String.fromCharCode(o1, o2, o3)
          }
      } while (i < data.length)

      dec = tmp_arr.join('')

      return dec
    }

    export function urlSafeBase64Encode(v: any) {
      v = base64Encode(v)
      return v.replace(/\//g, '_').replace(/\+/g, '-')
    }

    export function urlSafeBase64Decode(v: any){
      v = v.replace(/_/g, '/').replace(/-/g, '+')
      return base64Decode(v)
    }