616 lines
23 KiB
JavaScript
616 lines
23 KiB
JavaScript
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/**
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* Cesium - https://github.com/CesiumGS/cesium
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*
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* Copyright 2011-2020 Cesium Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Columbus View (Pat. Pend.)
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*
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* Portions licensed separately.
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* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['exports'], function (exports) { 'use strict';
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var read = function (buffer, offset, isLE, mLen, nBytes) {
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var e, m;
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var eLen = (nBytes * 8) - mLen - 1;
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var eMax = (1 << eLen) - 1;
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var eBias = eMax >> 1;
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var nBits = -7;
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var i = isLE ? (nBytes - 1) : 0;
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var d = isLE ? -1 : 1;
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var s = buffer[offset + i];
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i += d;
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e = s & ((1 << (-nBits)) - 1);
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s >>= (-nBits);
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nBits += eLen;
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for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
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m = e & ((1 << (-nBits)) - 1);
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e >>= (-nBits);
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nBits += mLen;
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for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
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if (e === 0) {
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e = 1 - eBias;
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} else if (e === eMax) {
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return m ? NaN : ((s ? -1 : 1) * Infinity)
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} else {
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m = m + Math.pow(2, mLen);
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e = e - eBias;
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}
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return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
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};
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var write = function (buffer, value, offset, isLE, mLen, nBytes) {
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var e, m, c;
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var eLen = (nBytes * 8) - mLen - 1;
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var eMax = (1 << eLen) - 1;
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var eBias = eMax >> 1;
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var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
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var i = isLE ? 0 : (nBytes - 1);
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var d = isLE ? 1 : -1;
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var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
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value = Math.abs(value);
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if (isNaN(value) || value === Infinity) {
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m = isNaN(value) ? 1 : 0;
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e = eMax;
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} else {
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e = Math.floor(Math.log(value) / Math.LN2);
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if (value * (c = Math.pow(2, -e)) < 1) {
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e--;
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c *= 2;
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}
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if (e + eBias >= 1) {
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value += rt / c;
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} else {
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value += rt * Math.pow(2, 1 - eBias);
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}
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if (value * c >= 2) {
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e++;
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c /= 2;
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}
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if (e + eBias >= eMax) {
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m = 0;
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e = eMax;
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} else if (e + eBias >= 1) {
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m = ((value * c) - 1) * Math.pow(2, mLen);
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e = e + eBias;
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} else {
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m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
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e = 0;
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}
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}
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for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
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e = (e << mLen) | m;
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eLen += mLen;
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for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
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buffer[offset + i - d] |= s * 128;
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};
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var ieee754 = {
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read: read,
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write: write
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};
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function Pbf(buf) {
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this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
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this.pos = 0;
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this.type = 0;
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this.length = this.buf.length;
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}
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Pbf.Varint = 0;
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Pbf.Fixed64 = 1;
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Pbf.Bytes = 2;
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Pbf.Fixed32 = 5;
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var SHIFT_LEFT_32 = (1 << 16) * (1 << 16);
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var SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
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Pbf.prototype = {
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destroy: function() {
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this.buf = null;
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},
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readFields: function(readField, result, end) {
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end = end || this.length;
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while (this.pos < end) {
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var val = this.readVarint(),
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tag = val >> 3,
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startPos = this.pos;
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this.type = val & 0x7;
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readField(tag, result, this);
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if (this.pos === startPos) this.skip(val);
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}
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return result;
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},
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readMessage: function(readField, result) {
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return this.readFields(readField, result, this.readVarint() + this.pos);
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},
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readFixed32: function() {
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var val = readUInt32(this.buf, this.pos);
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this.pos += 4;
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return val;
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},
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readSFixed32: function() {
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var val = readInt32(this.buf, this.pos);
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this.pos += 4;
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return val;
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},
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readFixed64: function() {
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var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
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this.pos += 8;
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return val;
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},
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readSFixed64: function() {
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var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
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this.pos += 8;
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return val;
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},
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readFloat: function() {
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var val = ieee754.read(this.buf, this.pos, true, 23, 4);
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this.pos += 4;
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return val;
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},
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readDouble: function() {
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var val = ieee754.read(this.buf, this.pos, true, 52, 8);
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this.pos += 8;
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return val;
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},
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readVarint: function(isSigned) {
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var buf = this.buf,
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val, b;
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b = buf[this.pos++]; val = b & 0x7f; if (b < 0x80) return val;
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b = buf[this.pos++]; val |= (b & 0x7f) << 7; if (b < 0x80) return val;
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b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) return val;
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b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) return val;
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b = buf[this.pos]; val |= (b & 0x0f) << 28;
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return readVarintRemainder(val, isSigned, this);
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},
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readVarint64: function() {
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return this.readVarint(true);
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},
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readSVarint: function() {
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var num = this.readVarint();
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return num % 2 === 1 ? (num + 1) / -2 : num / 2;
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},
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readBoolean: function() {
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return Boolean(this.readVarint());
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},
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readString: function() {
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var end = this.readVarint() + this.pos,
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str = readUtf8(this.buf, this.pos, end);
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this.pos = end;
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return str;
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},
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readBytes: function() {
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var end = this.readVarint() + this.pos,
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buffer = this.buf.subarray(this.pos, end);
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this.pos = end;
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return buffer;
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},
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readPackedVarint: function(arr, isSigned) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readVarint(isSigned));
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return arr;
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},
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readPackedSVarint: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readSVarint());
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return arr;
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},
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readPackedBoolean: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readBoolean());
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return arr;
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},
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readPackedFloat: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readFloat());
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return arr;
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},
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readPackedDouble: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readDouble());
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return arr;
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},
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readPackedFixed32: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readFixed32());
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return arr;
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},
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readPackedSFixed32: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readSFixed32());
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return arr;
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},
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readPackedFixed64: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readFixed64());
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return arr;
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},
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readPackedSFixed64: function(arr) {
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var end = readPackedEnd(this);
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arr = arr || [];
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while (this.pos < end) arr.push(this.readSFixed64());
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return arr;
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},
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skip: function(val) {
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var type = val & 0x7;
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if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {}
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else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;
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else if (type === Pbf.Fixed32) this.pos += 4;
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else if (type === Pbf.Fixed64) this.pos += 8;
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else throw new Error('Unimplemented type: ' + type);
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},
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writeTag: function(tag, type) {
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this.writeVarint((tag << 3) | type);
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},
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realloc: function(min) {
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var length = this.length || 16;
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while (length < this.pos + min) length *= 2;
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if (length !== this.length) {
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var buf = new Uint8Array(length);
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buf.set(this.buf);
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this.buf = buf;
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this.length = length;
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}
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},
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finish: function() {
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this.length = this.pos;
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this.pos = 0;
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return this.buf.subarray(0, this.length);
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},
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writeFixed32: function(val) {
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this.realloc(4);
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writeInt32(this.buf, val, this.pos);
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this.pos += 4;
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},
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writeSFixed32: function(val) {
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this.realloc(4);
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writeInt32(this.buf, val, this.pos);
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this.pos += 4;
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},
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writeFixed64: function(val) {
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this.realloc(8);
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writeInt32(this.buf, val & -1, this.pos);
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writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
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this.pos += 8;
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},
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writeSFixed64: function(val) {
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this.realloc(8);
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writeInt32(this.buf, val & -1, this.pos);
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writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
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this.pos += 8;
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},
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writeVarint: function(val) {
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val = +val || 0;
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if (val > 0xfffffff || val < 0) {
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writeBigVarint(val, this);
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return;
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}
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this.realloc(4);
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this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;
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this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;
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this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;
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this.buf[this.pos++] = (val >>> 7) & 0x7f;
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},
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writeSVarint: function(val) {
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this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
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},
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writeBoolean: function(val) {
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this.writeVarint(Boolean(val));
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},
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writeString: function(str) {
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str = String(str);
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this.realloc(str.length * 4);
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this.pos++;
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var startPos = this.pos;
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this.pos = writeUtf8(this.buf, str, this.pos);
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var len = this.pos - startPos;
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if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);
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this.pos = startPos - 1;
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this.writeVarint(len);
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this.pos += len;
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},
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writeFloat: function(val) {
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this.realloc(4);
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ieee754.write(this.buf, val, this.pos, true, 23, 4);
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this.pos += 4;
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},
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writeDouble: function(val) {
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this.realloc(8);
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ieee754.write(this.buf, val, this.pos, true, 52, 8);
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this.pos += 8;
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},
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writeBytes: function(buffer) {
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var len = buffer.length;
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this.writeVarint(len);
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this.realloc(len);
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for (var i = 0; i < len; i++) this.buf[this.pos++] = buffer[i];
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},
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writeRawMessage: function(fn, obj) {
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this.pos++;
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var startPos = this.pos;
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||
|
|
fn(obj, this);
|
||
|
|
var len = this.pos - startPos;
|
||
|
|
if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);
|
||
|
|
this.pos = startPos - 1;
|
||
|
|
this.writeVarint(len);
|
||
|
|
this.pos += len;
|
||
|
|
},
|
||
|
|
writeMessage: function(tag, fn, obj) {
|
||
|
|
this.writeTag(tag, Pbf.Bytes);
|
||
|
|
this.writeRawMessage(fn, obj);
|
||
|
|
},
|
||
|
|
writePackedVarint: function(tag, arr) { this.writeMessage(tag, writePackedVarint, arr); },
|
||
|
|
writePackedSVarint: function(tag, arr) { this.writeMessage(tag, writePackedSVarint, arr); },
|
||
|
|
writePackedBoolean: function(tag, arr) { this.writeMessage(tag, writePackedBoolean, arr); },
|
||
|
|
writePackedFloat: function(tag, arr) { this.writeMessage(tag, writePackedFloat, arr); },
|
||
|
|
writePackedDouble: function(tag, arr) { this.writeMessage(tag, writePackedDouble, arr); },
|
||
|
|
writePackedFixed32: function(tag, arr) { this.writeMessage(tag, writePackedFixed32, arr); },
|
||
|
|
writePackedSFixed32: function(tag, arr) { this.writeMessage(tag, writePackedSFixed32, arr); },
|
||
|
|
writePackedFixed64: function(tag, arr) { this.writeMessage(tag, writePackedFixed64, arr); },
|
||
|
|
writePackedSFixed64: function(tag, arr) { this.writeMessage(tag, writePackedSFixed64, arr); },
|
||
|
|
writeBytesField: function(tag, buffer) {
|
||
|
|
this.writeTag(tag, Pbf.Bytes);
|
||
|
|
this.writeBytes(buffer);
|
||
|
|
},
|
||
|
|
writeFixed32Field: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed32);
|
||
|
|
this.writeFixed32(val);
|
||
|
|
},
|
||
|
|
writeSFixed32Field: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed32);
|
||
|
|
this.writeSFixed32(val);
|
||
|
|
},
|
||
|
|
writeFixed64Field: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed64);
|
||
|
|
this.writeFixed64(val);
|
||
|
|
},
|
||
|
|
writeSFixed64Field: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed64);
|
||
|
|
this.writeSFixed64(val);
|
||
|
|
},
|
||
|
|
writeVarintField: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Varint);
|
||
|
|
this.writeVarint(val);
|
||
|
|
},
|
||
|
|
writeSVarintField: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Varint);
|
||
|
|
this.writeSVarint(val);
|
||
|
|
},
|
||
|
|
writeStringField: function(tag, str) {
|
||
|
|
this.writeTag(tag, Pbf.Bytes);
|
||
|
|
this.writeString(str);
|
||
|
|
},
|
||
|
|
writeFloatField: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed32);
|
||
|
|
this.writeFloat(val);
|
||
|
|
},
|
||
|
|
writeDoubleField: function(tag, val) {
|
||
|
|
this.writeTag(tag, Pbf.Fixed64);
|
||
|
|
this.writeDouble(val);
|
||
|
|
},
|
||
|
|
writeBooleanField: function(tag, val) {
|
||
|
|
this.writeVarintField(tag, Boolean(val));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
function readVarintRemainder(l, s, p) {
|
||
|
|
var buf = p.buf,
|
||
|
|
h, b;
|
||
|
|
b = buf[p.pos++]; h = (b & 0x70) >> 4; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
b = buf[p.pos++]; h |= (b & 0x7f) << 3; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) return toNum(l, h, s);
|
||
|
|
throw new Error('Expected varint not more than 10 bytes');
|
||
|
|
}
|
||
|
|
function readPackedEnd(pbf) {
|
||
|
|
return pbf.type === Pbf.Bytes ?
|
||
|
|
pbf.readVarint() + pbf.pos : pbf.pos + 1;
|
||
|
|
}
|
||
|
|
function toNum(low, high, isSigned) {
|
||
|
|
if (isSigned) {
|
||
|
|
return high * 0x100000000 + (low >>> 0);
|
||
|
|
}
|
||
|
|
return ((high >>> 0) * 0x100000000) + (low >>> 0);
|
||
|
|
}
|
||
|
|
function writeBigVarint(val, pbf) {
|
||
|
|
var low, high;
|
||
|
|
if (val >= 0) {
|
||
|
|
low = (val % 0x100000000) | 0;
|
||
|
|
high = (val / 0x100000000) | 0;
|
||
|
|
} else {
|
||
|
|
low = ~(-val % 0x100000000);
|
||
|
|
high = ~(-val / 0x100000000);
|
||
|
|
if (low ^ 0xffffffff) {
|
||
|
|
low = (low + 1) | 0;
|
||
|
|
} else {
|
||
|
|
low = 0;
|
||
|
|
high = (high + 1) | 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
|
||
|
|
throw new Error('Given varint doesn\'t fit into 10 bytes');
|
||
|
|
}
|
||
|
|
pbf.realloc(10);
|
||
|
|
writeBigVarintLow(low, high, pbf);
|
||
|
|
writeBigVarintHigh(high, pbf);
|
||
|
|
}
|
||
|
|
function writeBigVarintLow(low, high, pbf) {
|
||
|
|
pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
|
||
|
|
pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
|
||
|
|
pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
|
||
|
|
pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
|
||
|
|
pbf.buf[pbf.pos] = low & 0x7f;
|
||
|
|
}
|
||
|
|
function writeBigVarintHigh(high, pbf) {
|
||
|
|
var lsb = (high & 0x07) << 4;
|
||
|
|
pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0); if (!high) return;
|
||
|
|
pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;
|
||
|
|
pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;
|
||
|
|
pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;
|
||
|
|
pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;
|
||
|
|
pbf.buf[pbf.pos++] = high & 0x7f;
|
||
|
|
}
|
||
|
|
function makeRoomForExtraLength(startPos, len, pbf) {
|
||
|
|
var extraLen =
|
||
|
|
len <= 0x3fff ? 1 :
|
||
|
|
len <= 0x1fffff ? 2 :
|
||
|
|
len <= 0xfffffff ? 3 : Math.ceil(Math.log(len) / (Math.LN2 * 7));
|
||
|
|
pbf.realloc(extraLen);
|
||
|
|
for (var i = pbf.pos - 1; i >= startPos; i--) pbf.buf[i + extraLen] = pbf.buf[i];
|
||
|
|
}
|
||
|
|
function writePackedVarint(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeVarint(arr[i]); }
|
||
|
|
function writePackedSVarint(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSVarint(arr[i]); }
|
||
|
|
function writePackedFloat(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFloat(arr[i]); }
|
||
|
|
function writePackedDouble(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeDouble(arr[i]); }
|
||
|
|
function writePackedBoolean(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeBoolean(arr[i]); }
|
||
|
|
function writePackedFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFixed32(arr[i]); }
|
||
|
|
function writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed32(arr[i]); }
|
||
|
|
function writePackedFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFixed64(arr[i]); }
|
||
|
|
function writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed64(arr[i]); }
|
||
|
|
function readUInt32(buf, pos) {
|
||
|
|
return ((buf[pos]) |
|
||
|
|
(buf[pos + 1] << 8) |
|
||
|
|
(buf[pos + 2] << 16)) +
|
||
|
|
(buf[pos + 3] * 0x1000000);
|
||
|
|
}
|
||
|
|
function writeInt32(buf, val, pos) {
|
||
|
|
buf[pos] = val;
|
||
|
|
buf[pos + 1] = (val >>> 8);
|
||
|
|
buf[pos + 2] = (val >>> 16);
|
||
|
|
buf[pos + 3] = (val >>> 24);
|
||
|
|
}
|
||
|
|
function readInt32(buf, pos) {
|
||
|
|
return ((buf[pos]) |
|
||
|
|
(buf[pos + 1] << 8) |
|
||
|
|
(buf[pos + 2] << 16)) +
|
||
|
|
(buf[pos + 3] << 24);
|
||
|
|
}
|
||
|
|
function readUtf8(buf, pos, end) {
|
||
|
|
var str = '';
|
||
|
|
var i = pos;
|
||
|
|
while (i < end) {
|
||
|
|
var b0 = buf[i];
|
||
|
|
var c = null;
|
||
|
|
var bytesPerSequence =
|
||
|
|
b0 > 0xEF ? 4 :
|
||
|
|
b0 > 0xDF ? 3 :
|
||
|
|
b0 > 0xBF ? 2 : 1;
|
||
|
|
if (i + bytesPerSequence > end) break;
|
||
|
|
var b1, b2, b3;
|
||
|
|
if (bytesPerSequence === 1) {
|
||
|
|
if (b0 < 0x80) {
|
||
|
|
c = b0;
|
||
|
|
}
|
||
|
|
} else if (bytesPerSequence === 2) {
|
||
|
|
b1 = buf[i + 1];
|
||
|
|
if ((b1 & 0xC0) === 0x80) {
|
||
|
|
c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);
|
||
|
|
if (c <= 0x7F) {
|
||
|
|
c = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if (bytesPerSequence === 3) {
|
||
|
|
b1 = buf[i + 1];
|
||
|
|
b2 = buf[i + 2];
|
||
|
|
if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
|
||
|
|
c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);
|
||
|
|
if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {
|
||
|
|
c = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if (bytesPerSequence === 4) {
|
||
|
|
b1 = buf[i + 1];
|
||
|
|
b2 = buf[i + 2];
|
||
|
|
b3 = buf[i + 3];
|
||
|
|
if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
|
||
|
|
c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);
|
||
|
|
if (c <= 0xFFFF || c >= 0x110000) {
|
||
|
|
c = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (c === null) {
|
||
|
|
c = 0xFFFD;
|
||
|
|
bytesPerSequence = 1;
|
||
|
|
} else if (c > 0xFFFF) {
|
||
|
|
c -= 0x10000;
|
||
|
|
str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
|
||
|
|
c = 0xDC00 | c & 0x3FF;
|
||
|
|
}
|
||
|
|
str += String.fromCharCode(c);
|
||
|
|
i += bytesPerSequence;
|
||
|
|
}
|
||
|
|
return str;
|
||
|
|
}
|
||
|
|
function writeUtf8(buf, str, pos) {
|
||
|
|
for (var i = 0, c, lead; i < str.length; i++) {
|
||
|
|
c = str.charCodeAt(i);
|
||
|
|
if (c > 0xD7FF && c < 0xE000) {
|
||
|
|
if (lead) {
|
||
|
|
if (c < 0xDC00) {
|
||
|
|
buf[pos++] = 0xEF;
|
||
|
|
buf[pos++] = 0xBF;
|
||
|
|
buf[pos++] = 0xBD;
|
||
|
|
lead = c;
|
||
|
|
continue;
|
||
|
|
} else {
|
||
|
|
c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
|
||
|
|
lead = null;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (c > 0xDBFF || (i + 1 === str.length)) {
|
||
|
|
buf[pos++] = 0xEF;
|
||
|
|
buf[pos++] = 0xBF;
|
||
|
|
buf[pos++] = 0xBD;
|
||
|
|
} else {
|
||
|
|
lead = c;
|
||
|
|
}
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
} else if (lead) {
|
||
|
|
buf[pos++] = 0xEF;
|
||
|
|
buf[pos++] = 0xBF;
|
||
|
|
buf[pos++] = 0xBD;
|
||
|
|
lead = null;
|
||
|
|
}
|
||
|
|
if (c < 0x80) {
|
||
|
|
buf[pos++] = c;
|
||
|
|
} else {
|
||
|
|
if (c < 0x800) {
|
||
|
|
buf[pos++] = c >> 0x6 | 0xC0;
|
||
|
|
} else {
|
||
|
|
if (c < 0x10000) {
|
||
|
|
buf[pos++] = c >> 0xC | 0xE0;
|
||
|
|
} else {
|
||
|
|
buf[pos++] = c >> 0x12 | 0xF0;
|
||
|
|
buf[pos++] = c >> 0xC & 0x3F | 0x80;
|
||
|
|
}
|
||
|
|
buf[pos++] = c >> 0x6 & 0x3F | 0x80;
|
||
|
|
}
|
||
|
|
buf[pos++] = c & 0x3F | 0x80;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.Protobuf = Pbf;
|
||
|
|
|
||
|
|
});
|