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Diffstat (limited to 'frontend-old/node_modules/protobufjs/src/reader.js')
| -rw-r--r-- | frontend-old/node_modules/protobufjs/src/reader.js | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/frontend-old/node_modules/protobufjs/src/reader.js b/frontend-old/node_modules/protobufjs/src/reader.js new file mode 100644 index 0000000..b4fbf29 --- /dev/null +++ b/frontend-old/node_modules/protobufjs/src/reader.js @@ -0,0 +1,416 @@ +"use strict"; +module.exports = Reader; + +var util = require("./util/minimal"); + +var BufferReader; // cyclic + +var LongBits = util.LongBits, + utf8 = util.utf8; + +/* istanbul ignore next */ +function indexOutOfRange(reader, writeLength) { + return RangeError("index out of range: " + reader.pos + " + " + (writeLength || 1) + " > " + reader.len); +} + +/** + * Constructs a new reader instance using the specified buffer. + * @classdesc Wire format reader using `Uint8Array` if available, otherwise `Array`. + * @constructor + * @param {Uint8Array} buffer Buffer to read from + */ +function Reader(buffer) { + + /** + * Read buffer. + * @type {Uint8Array} + */ + this.buf = buffer; + + /** + * Read buffer position. + * @type {number} + */ + this.pos = 0; + + /** + * Read buffer length. + * @type {number} + */ + this.len = buffer.length; +} + +var create_array = typeof Uint8Array !== "undefined" + ? function create_typed_array(buffer) { + if (buffer instanceof Uint8Array || Array.isArray(buffer)) + return new Reader(buffer); + throw Error("illegal buffer"); + } + /* istanbul ignore next */ + : function create_array(buffer) { + if (Array.isArray(buffer)) + return new Reader(buffer); + throw Error("illegal buffer"); + }; + +var create = function create() { + return util.Buffer + ? function create_buffer_setup(buffer) { + return (Reader.create = function create_buffer(buffer) { + return util.Buffer.isBuffer(buffer) + ? new BufferReader(buffer) + /* istanbul ignore next */ + : create_array(buffer); + })(buffer); + } + /* istanbul ignore next */ + : create_array; +}; + +/** + * Creates a new reader using the specified buffer. + * @function + * @param {Uint8Array|Buffer} buffer Buffer to read from + * @returns {Reader|BufferReader} A {@link BufferReader} if `buffer` is a Buffer, otherwise a {@link Reader} + * @throws {Error} If `buffer` is not a valid buffer + */ +Reader.create = create(); + +Reader.prototype._slice = util.Array.prototype.subarray || /* istanbul ignore next */ util.Array.prototype.slice; + +/** + * Reads a varint as an unsigned 32 bit value. + * @function + * @returns {number} Value read + */ +Reader.prototype.uint32 = (function read_uint32_setup() { + var value = 4294967295; // optimizer type-hint, tends to deopt otherwise (?!) + return function read_uint32() { + value = ( this.buf[this.pos] & 127 ) >>> 0; if (this.buf[this.pos++] < 128) return value; + value = (value | (this.buf[this.pos] & 127) << 7) >>> 0; if (this.buf[this.pos++] < 128) return value; + value = (value | (this.buf[this.pos] & 127) << 14) >>> 0; if (this.buf[this.pos++] < 128) return value; + value = (value | (this.buf[this.pos] & 127) << 21) >>> 0; if (this.buf[this.pos++] < 128) return value; + value = (value | (this.buf[this.pos] & 15) << 28) >>> 0; if (this.buf[this.pos++] < 128) return value; + + /* istanbul ignore if */ + if ((this.pos += 5) > this.len) { + this.pos = this.len; + throw indexOutOfRange(this, 10); + } + return value; + }; +})(); + +/** + * Reads a varint as a signed 32 bit value. + * @returns {number} Value read + */ +Reader.prototype.int32 = function read_int32() { + return this.uint32() | 0; +}; + +/** + * Reads a zig-zag encoded varint as a signed 32 bit value. + * @returns {number} Value read + */ +Reader.prototype.sint32 = function read_sint32() { + var value = this.uint32(); + return value >>> 1 ^ -(value & 1) | 0; +}; + +/* eslint-disable no-invalid-this */ + +function readLongVarint() { + // tends to deopt with local vars for octet etc. + var bits = new LongBits(0, 0); + var i = 0; + if (this.len - this.pos > 4) { // fast route (lo) + for (; i < 4; ++i) { + // 1st..4th + bits.lo = (bits.lo | (this.buf[this.pos] & 127) << i * 7) >>> 0; + if (this.buf[this.pos++] < 128) + return bits; + } + // 5th + bits.lo = (bits.lo | (this.buf[this.pos] & 127) << 28) >>> 0; + bits.hi = (bits.hi | (this.buf[this.pos] & 127) >> 4) >>> 0; + if (this.buf[this.pos++] < 128) + return bits; + i = 0; + } else { + for (; i < 3; ++i) { + /* istanbul ignore if */ + if (this.pos >= this.len) + throw indexOutOfRange(this); + // 1st..3th + bits.lo = (bits.lo | (this.buf[this.pos] & 127) << i * 7) >>> 0; + if (this.buf[this.pos++] < 128) + return bits; + } + // 4th + bits.lo = (bits.lo | (this.buf[this.pos++] & 127) << i * 7) >>> 0; + return bits; + } + if (this.len - this.pos > 4) { // fast route (hi) + for (; i < 5; ++i) { + // 6th..10th + bits.hi = (bits.hi | (this.buf[this.pos] & 127) << i * 7 + 3) >>> 0; + if (this.buf[this.pos++] < 128) + return bits; + } + } else { + for (; i < 5; ++i) { + /* istanbul ignore if */ + if (this.pos >= this.len) + throw indexOutOfRange(this); + // 6th..10th + bits.hi = (bits.hi | (this.buf[this.pos] & 127) << i * 7 + 3) >>> 0; + if (this.buf[this.pos++] < 128) + return bits; + } + } + /* istanbul ignore next */ + throw Error("invalid varint encoding"); +} + +/* eslint-enable no-invalid-this */ + +/** + * Reads a varint as a signed 64 bit value. + * @name Reader#int64 + * @function + * @returns {Long} Value read + */ + +/** + * Reads a varint as an unsigned 64 bit value. + * @name Reader#uint64 + * @function + * @returns {Long} Value read + */ + +/** + * Reads a zig-zag encoded varint as a signed 64 bit value. + * @name Reader#sint64 + * @function + * @returns {Long} Value read + */ + +/** + * Reads a varint as a boolean. + * @returns {boolean} Value read + */ +Reader.prototype.bool = function read_bool() { + return this.uint32() !== 0; +}; + +function readFixed32_end(buf, end) { // note that this uses `end`, not `pos` + return (buf[end - 4] + | buf[end - 3] << 8 + | buf[end - 2] << 16 + | buf[end - 1] << 24) >>> 0; +} + +/** + * Reads fixed 32 bits as an unsigned 32 bit integer. + * @returns {number} Value read + */ +Reader.prototype.fixed32 = function read_fixed32() { + + /* istanbul ignore if */ + if (this.pos + 4 > this.len) + throw indexOutOfRange(this, 4); + + return readFixed32_end(this.buf, this.pos += 4); +}; + +/** + * Reads fixed 32 bits as a signed 32 bit integer. + * @returns {number} Value read + */ +Reader.prototype.sfixed32 = function read_sfixed32() { + + /* istanbul ignore if */ + if (this.pos + 4 > this.len) + throw indexOutOfRange(this, 4); + + return readFixed32_end(this.buf, this.pos += 4) | 0; +}; + +/* eslint-disable no-invalid-this */ + +function readFixed64(/* this: Reader */) { + + /* istanbul ignore if */ + if (this.pos + 8 > this.len) + throw indexOutOfRange(this, 8); + + return new LongBits(readFixed32_end(this.buf, this.pos += 4), readFixed32_end(this.buf, this.pos += 4)); +} + +/* eslint-enable no-invalid-this */ + +/** + * Reads fixed 64 bits. + * @name Reader#fixed64 + * @function + * @returns {Long} Value read + */ + +/** + * Reads zig-zag encoded fixed 64 bits. + * @name Reader#sfixed64 + * @function + * @returns {Long} Value read + */ + +/** + * Reads a float (32 bit) as a number. + * @function + * @returns {number} Value read + */ +Reader.prototype.float = function read_float() { + + /* istanbul ignore if */ + if (this.pos + 4 > this.len) + throw indexOutOfRange(this, 4); + + var value = util.float.readFloatLE(this.buf, this.pos); + this.pos += 4; + return value; +}; + +/** + * Reads a double (64 bit float) as a number. + * @function + * @returns {number} Value read + */ +Reader.prototype.double = function read_double() { + + /* istanbul ignore if */ + if (this.pos + 8 > this.len) + throw indexOutOfRange(this, 4); + + var value = util.float.readDoubleLE(this.buf, this.pos); + this.pos += 8; + return value; +}; + +/** + * Reads a sequence of bytes preceeded by its length as a varint. + * @returns {Uint8Array} Value read + */ +Reader.prototype.bytes = function read_bytes() { + var length = this.uint32(), + start = this.pos, + end = this.pos + length; + + /* istanbul ignore if */ + if (end > this.len) + throw indexOutOfRange(this, length); + + this.pos += length; + if (Array.isArray(this.buf)) // plain array + return this.buf.slice(start, end); + + if (start === end) { // fix for IE 10/Win8 and others' subarray returning array of size 1 + var nativeBuffer = util.Buffer; + return nativeBuffer + ? nativeBuffer.alloc(0) + : new this.buf.constructor(0); + } + return this._slice.call(this.buf, start, end); +}; + +/** + * Reads a string preceeded by its byte length as a varint. + * @returns {string} Value read + */ +Reader.prototype.string = function read_string() { + var bytes = this.bytes(); + return utf8.read(bytes, 0, bytes.length); +}; + +/** + * Skips the specified number of bytes if specified, otherwise skips a varint. + * @param {number} [length] Length if known, otherwise a varint is assumed + * @returns {Reader} `this` + */ +Reader.prototype.skip = function skip(length) { + if (typeof length === "number") { + /* istanbul ignore if */ + if (this.pos + length > this.len) + throw indexOutOfRange(this, length); + this.pos += length; + } else { + do { + /* istanbul ignore if */ + if (this.pos >= this.len) + throw indexOutOfRange(this); + } while (this.buf[this.pos++] & 128); + } + return this; +}; + +/** + * Skips the next element of the specified wire type. + * @param {number} wireType Wire type received + * @returns {Reader} `this` + */ +Reader.prototype.skipType = function(wireType) { + switch (wireType) { + case 0: + this.skip(); + break; + case 1: + this.skip(8); + break; + case 2: + this.skip(this.uint32()); + break; + case 3: + while ((wireType = this.uint32() & 7) !== 4) { + this.skipType(wireType); + } + break; + case 5: + this.skip(4); + break; + + /* istanbul ignore next */ + default: + throw Error("invalid wire type " + wireType + " at offset " + this.pos); + } + return this; +}; + +Reader._configure = function(BufferReader_) { + BufferReader = BufferReader_; + Reader.create = create(); + BufferReader._configure(); + + var fn = util.Long ? "toLong" : /* istanbul ignore next */ "toNumber"; + util.merge(Reader.prototype, { + + int64: function read_int64() { + return readLongVarint.call(this)[fn](false); + }, + + uint64: function read_uint64() { + return readLongVarint.call(this)[fn](true); + }, + + sint64: function read_sint64() { + return readLongVarint.call(this).zzDecode()[fn](false); + }, + + fixed64: function read_fixed64() { + return readFixed64.call(this)[fn](true); + }, + + sfixed64: function read_sfixed64() { + return readFixed64.call(this)[fn](false); + } + + }); +}; |