mirror of
https://github.com/apache/cordova-android.git
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84cb08b23e
This reverts commit5a5f544a48
. Rationale: base64-js update in5a5f544
causes extra base64-js version to be installed under plist (node_modules/plist/node_modules/base64-js), which would need to be committed to satisfy the needs of the deprecated Node.js 4 version. The extra base64-js version in node_modules/plist/node_modules/base64-js was missed at the time5a5f544
was committed. The base64-js update in5a5f544
is now deemed as not wanted due to the extra base64-js version that would need to be committed. The other dependencies updates in5a5f544
may be nice to have but not considered necessary for the patch release. Reverting now to unblock the upcoming 7.1.4 patch release. Note that neither5a5f544
nor this revert will show up in the master branch.
115 lines
3.4 KiB
JavaScript
115 lines
3.4 KiB
JavaScript
'use strict'
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exports.byteLength = byteLength
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exports.toByteArray = toByteArray
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exports.fromByteArray = fromByteArray
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var lookup = []
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var revLookup = []
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var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
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var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
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for (var i = 0, len = code.length; i < len; ++i) {
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lookup[i] = code[i]
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revLookup[code.charCodeAt(i)] = i
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}
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revLookup['-'.charCodeAt(0)] = 62
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revLookup['_'.charCodeAt(0)] = 63
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function placeHoldersCount (b64) {
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var len = b64.length
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if (len % 4 > 0) {
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throw new Error('Invalid string. Length must be a multiple of 4')
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}
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// the number of equal signs (place holders)
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// if there are two placeholders, than the two characters before it
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// represent one byte
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// if there is only one, then the three characters before it represent 2 bytes
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// this is just a cheap hack to not do indexOf twice
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return b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0
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}
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function byteLength (b64) {
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// base64 is 4/3 + up to two characters of the original data
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return b64.length * 3 / 4 - placeHoldersCount(b64)
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}
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function toByteArray (b64) {
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var i, j, l, tmp, placeHolders, arr
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var len = b64.length
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placeHolders = placeHoldersCount(b64)
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arr = new Arr(len * 3 / 4 - placeHolders)
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// if there are placeholders, only get up to the last complete 4 chars
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l = placeHolders > 0 ? len - 4 : len
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var L = 0
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for (i = 0, j = 0; i < l; i += 4, j += 3) {
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tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)]
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arr[L++] = (tmp >> 16) & 0xFF
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arr[L++] = (tmp >> 8) & 0xFF
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arr[L++] = tmp & 0xFF
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}
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if (placeHolders === 2) {
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tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4)
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arr[L++] = tmp & 0xFF
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} else if (placeHolders === 1) {
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tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2)
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arr[L++] = (tmp >> 8) & 0xFF
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arr[L++] = tmp & 0xFF
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}
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return arr
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}
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function tripletToBase64 (num) {
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return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
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}
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function encodeChunk (uint8, start, end) {
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var tmp
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var output = []
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for (var i = start; i < end; i += 3) {
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tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
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output.push(tripletToBase64(tmp))
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}
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return output.join('')
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}
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function fromByteArray (uint8) {
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var tmp
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var len = uint8.length
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var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
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var output = ''
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var parts = []
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var maxChunkLength = 16383 // must be multiple of 3
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// go through the array every three bytes, we'll deal with trailing stuff later
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for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
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parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
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}
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// pad the end with zeros, but make sure to not forget the extra bytes
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if (extraBytes === 1) {
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tmp = uint8[len - 1]
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output += lookup[tmp >> 2]
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output += lookup[(tmp << 4) & 0x3F]
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output += '=='
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} else if (extraBytes === 2) {
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tmp = (uint8[len - 2] << 8) + (uint8[len - 1])
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output += lookup[tmp >> 10]
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output += lookup[(tmp >> 4) & 0x3F]
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output += lookup[(tmp << 2) & 0x3F]
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output += '='
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}
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parts.push(output)
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return parts.join('')
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}
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