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Diffstat (limited to 'frontend-old/node_modules/protobufjs/src/util/longbits.js')
| -rw-r--r-- | frontend-old/node_modules/protobufjs/src/util/longbits.js | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/frontend-old/node_modules/protobufjs/src/util/longbits.js b/frontend-old/node_modules/protobufjs/src/util/longbits.js new file mode 100644 index 0000000..11bfb1c --- /dev/null +++ b/frontend-old/node_modules/protobufjs/src/util/longbits.js @@ -0,0 +1,200 @@ +"use strict"; +module.exports = LongBits; + +var util = require("../util/minimal"); + +/** + * Constructs new long bits. + * @classdesc Helper class for working with the low and high bits of a 64 bit value. + * @memberof util + * @constructor + * @param {number} lo Low 32 bits, unsigned + * @param {number} hi High 32 bits, unsigned + */ +function LongBits(lo, hi) { + + // note that the casts below are theoretically unnecessary as of today, but older statically + // generated converter code might still call the ctor with signed 32bits. kept for compat. + + /** + * Low bits. + * @type {number} + */ + this.lo = lo >>> 0; + + /** + * High bits. + * @type {number} + */ + this.hi = hi >>> 0; +} + +/** + * Zero bits. + * @memberof util.LongBits + * @type {util.LongBits} + */ +var zero = LongBits.zero = new LongBits(0, 0); + +zero.toNumber = function() { return 0; }; +zero.zzEncode = zero.zzDecode = function() { return this; }; +zero.length = function() { return 1; }; + +/** + * Zero hash. + * @memberof util.LongBits + * @type {string} + */ +var zeroHash = LongBits.zeroHash = "\0\0\0\0\0\0\0\0"; + +/** + * Constructs new long bits from the specified number. + * @param {number} value Value + * @returns {util.LongBits} Instance + */ +LongBits.fromNumber = function fromNumber(value) { + if (value === 0) + return zero; + var sign = value < 0; + if (sign) + value = -value; + var lo = value >>> 0, + hi = (value - lo) / 4294967296 >>> 0; + if (sign) { + hi = ~hi >>> 0; + lo = ~lo >>> 0; + if (++lo > 4294967295) { + lo = 0; + if (++hi > 4294967295) + hi = 0; + } + } + return new LongBits(lo, hi); +}; + +/** + * Constructs new long bits from a number, long or string. + * @param {Long|number|string} value Value + * @returns {util.LongBits} Instance + */ +LongBits.from = function from(value) { + if (typeof value === "number") + return LongBits.fromNumber(value); + if (util.isString(value)) { + /* istanbul ignore else */ + if (util.Long) + value = util.Long.fromString(value); + else + return LongBits.fromNumber(parseInt(value, 10)); + } + return value.low || value.high ? new LongBits(value.low >>> 0, value.high >>> 0) : zero; +}; + +/** + * Converts this long bits to a possibly unsafe JavaScript number. + * @param {boolean} [unsigned=false] Whether unsigned or not + * @returns {number} Possibly unsafe number + */ +LongBits.prototype.toNumber = function toNumber(unsigned) { + if (!unsigned && this.hi >>> 31) { + var lo = ~this.lo + 1 >>> 0, + hi = ~this.hi >>> 0; + if (!lo) + hi = hi + 1 >>> 0; + return -(lo + hi * 4294967296); + } + return this.lo + this.hi * 4294967296; +}; + +/** + * Converts this long bits to a long. + * @param {boolean} [unsigned=false] Whether unsigned or not + * @returns {Long} Long + */ +LongBits.prototype.toLong = function toLong(unsigned) { + return util.Long + ? new util.Long(this.lo | 0, this.hi | 0, Boolean(unsigned)) + /* istanbul ignore next */ + : { low: this.lo | 0, high: this.hi | 0, unsigned: Boolean(unsigned) }; +}; + +var charCodeAt = String.prototype.charCodeAt; + +/** + * Constructs new long bits from the specified 8 characters long hash. + * @param {string} hash Hash + * @returns {util.LongBits} Bits + */ +LongBits.fromHash = function fromHash(hash) { + if (hash === zeroHash) + return zero; + return new LongBits( + ( charCodeAt.call(hash, 0) + | charCodeAt.call(hash, 1) << 8 + | charCodeAt.call(hash, 2) << 16 + | charCodeAt.call(hash, 3) << 24) >>> 0 + , + ( charCodeAt.call(hash, 4) + | charCodeAt.call(hash, 5) << 8 + | charCodeAt.call(hash, 6) << 16 + | charCodeAt.call(hash, 7) << 24) >>> 0 + ); +}; + +/** + * Converts this long bits to a 8 characters long hash. + * @returns {string} Hash + */ +LongBits.prototype.toHash = function toHash() { + return String.fromCharCode( + this.lo & 255, + this.lo >>> 8 & 255, + this.lo >>> 16 & 255, + this.lo >>> 24 , + this.hi & 255, + this.hi >>> 8 & 255, + this.hi >>> 16 & 255, + this.hi >>> 24 + ); +}; + +/** + * Zig-zag encodes this long bits. + * @returns {util.LongBits} `this` + */ +LongBits.prototype.zzEncode = function zzEncode() { + var mask = this.hi >> 31; + this.hi = ((this.hi << 1 | this.lo >>> 31) ^ mask) >>> 0; + this.lo = ( this.lo << 1 ^ mask) >>> 0; + return this; +}; + +/** + * Zig-zag decodes this long bits. + * @returns {util.LongBits} `this` + */ +LongBits.prototype.zzDecode = function zzDecode() { + var mask = -(this.lo & 1); + this.lo = ((this.lo >>> 1 | this.hi << 31) ^ mask) >>> 0; + this.hi = ( this.hi >>> 1 ^ mask) >>> 0; + return this; +}; + +/** + * Calculates the length of this longbits when encoded as a varint. + * @returns {number} Length + */ +LongBits.prototype.length = function length() { + var part0 = this.lo, + part1 = (this.lo >>> 28 | this.hi << 4) >>> 0, + part2 = this.hi >>> 24; + return part2 === 0 + ? part1 === 0 + ? part0 < 16384 + ? part0 < 128 ? 1 : 2 + : part0 < 2097152 ? 3 : 4 + : part1 < 16384 + ? part1 < 128 ? 5 : 6 + : part1 < 2097152 ? 7 : 8 + : part2 < 128 ? 9 : 10; +}; |