Index: third_party/protobuf/js/binary/encoder.js |
diff --git a/third_party/protobuf/js/binary/encoder.js b/third_party/protobuf/js/binary/encoder.js |
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+// Protocol Buffers - Google's data interchange format |
+// Copyright 2008 Google Inc. All rights reserved. |
+// https://developers.google.com/protocol-buffers/ |
+// |
+// Redistribution and use in source and binary forms, with or without |
+// modification, are permitted provided that the following conditions are |
+// met: |
+// |
+// * Redistributions of source code must retain the above copyright |
+// notice, this list of conditions and the following disclaimer. |
+// * Redistributions in binary form must reproduce the above |
+// copyright notice, this list of conditions and the following disclaimer |
+// in the documentation and/or other materials provided with the |
+// distribution. |
+// * Neither the name of Google Inc. nor the names of its |
+// contributors may be used to endorse or promote products derived from |
+// this software without specific prior written permission. |
+// |
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ |
+/** |
+ * @fileoverview BinaryEncode defines methods for encoding Javascript values |
+ * into arrays of bytes compatible with the Protocol Buffer wire format. |
+ * |
+ * @author aappleby@google.com (Austin Appleby) |
+ */ |
+ |
+goog.provide('jspb.BinaryEncoder'); |
+ |
+goog.require('goog.asserts'); |
+goog.require('jspb.BinaryConstants'); |
+goog.require('jspb.utils'); |
+ |
+ |
+ |
+/** |
+ * BinaryEncoder implements encoders for all the wire types specified in |
+ * https://developers.google.com/protocol-buffers/docs/encoding. |
+ * |
+ * @constructor |
+ * @struct |
+ */ |
+jspb.BinaryEncoder = function() { |
+ /** @private {!Array.<number>} */ |
+ this.buffer_ = []; |
+}; |
+ |
+ |
+/** |
+ * @return {number} |
+ */ |
+jspb.BinaryEncoder.prototype.length = function() { |
+ return this.buffer_.length; |
+}; |
+ |
+ |
+/** |
+ * @return {!Array.<number>} |
+ */ |
+jspb.BinaryEncoder.prototype.end = function() { |
+ var buffer = this.buffer_; |
+ this.buffer_ = []; |
+ return buffer; |
+}; |
+ |
+ |
+/** |
+ * Encodes a 64-bit integer in 32:32 split representation into its wire-format |
+ * varint representation and stores it in the buffer. |
+ * @param {number} lowBits The low 32 bits of the int. |
+ * @param {number} highBits The high 32 bits of the int. |
+ */ |
+jspb.BinaryEncoder.prototype.writeSplitVarint64 = function(lowBits, highBits) { |
+ goog.asserts.assert(lowBits == Math.floor(lowBits)); |
+ goog.asserts.assert(highBits == Math.floor(highBits)); |
+ goog.asserts.assert((lowBits >= 0) && |
+ (lowBits < jspb.BinaryConstants.TWO_TO_32)); |
+ goog.asserts.assert((highBits >= 0) && |
+ (highBits < jspb.BinaryConstants.TWO_TO_32)); |
+ |
+ // Break the binary representation into chunks of 7 bits, set the 8th bit |
+ // in each chunk if it's not the final chunk, and append to the result. |
+ while (highBits > 0 || lowBits > 127) { |
+ this.buffer_.push((lowBits & 0x7f) | 0x80); |
+ lowBits = ((lowBits >>> 7) | (highBits << 25)) >>> 0; |
+ highBits = highBits >>> 7; |
+ } |
+ this.buffer_.push(lowBits); |
+}; |
+ |
+ |
+/** |
+ * Encodes a 32-bit unsigned integer into its wire-format varint representation |
+ * and stores it in the buffer. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUnsignedVarint32 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && |
+ (value < jspb.BinaryConstants.TWO_TO_32)); |
+ |
+ while (value > 127) { |
+ this.buffer_.push((value & 0x7f) | 0x80); |
+ value = value >>> 7; |
+ } |
+ |
+ this.buffer_.push(value); |
+}; |
+ |
+ |
+/** |
+ * Encodes a 32-bit signed integer into its wire-format varint representation |
+ * and stores it in the buffer. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeSignedVarint32 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_31) && |
+ (value < jspb.BinaryConstants.TWO_TO_31)); |
+ |
+ // Use the unsigned version if the value is not negative. |
+ if (value >= 0) { |
+ this.writeUnsignedVarint32(value); |
+ return; |
+ } |
+ |
+ // Write nine bytes with a _signed_ right shift so we preserve the sign bit. |
+ for (var i = 0; i < 9; i++) { |
+ this.buffer_.push((value & 0x7f) | 0x80); |
+ value = value >> 7; |
+ } |
+ |
+ // The above loop writes out 63 bits, so the last byte is always the sign bit |
+ // which is always set for negative numbers. |
+ this.buffer_.push(1); |
+}; |
+ |
+ |
+/** |
+ * Encodes a 64-bit unsigned integer into its wire-format varint representation |
+ * and stores it in the buffer. Integers that are not representable in 64 bits |
+ * will be truncated. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUnsignedVarint64 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && |
+ (value < jspb.BinaryConstants.TWO_TO_64)); |
+ jspb.utils.splitInt64(value); |
+ this.writeSplitVarint64(jspb.utils.split64Low, |
+ jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Encodes a 64-bit signed integer into its wire-format varint representation |
+ * and stores it in the buffer. Integers that are not representable in 64 bits |
+ * will be truncated. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeSignedVarint64 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_63) && |
+ (value < jspb.BinaryConstants.TWO_TO_63)); |
+ jspb.utils.splitInt64(value); |
+ this.writeSplitVarint64(jspb.utils.split64Low, |
+ jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Encodes a JavaScript integer into its wire-format, zigzag-encoded varint |
+ * representation and stores it in the buffer. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeZigzagVarint32 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_31) && |
+ (value < jspb.BinaryConstants.TWO_TO_31)); |
+ this.writeUnsignedVarint32(((value << 1) ^ (value >> 31)) >>> 0); |
+}; |
+ |
+ |
+/** |
+ * Encodes a JavaScript integer into its wire-format, zigzag-encoded varint |
+ * representation and stores it in the buffer. Integers not representable in 64 |
+ * bits will be truncated. |
+ * @param {number} value The integer to convert. |
+ */ |
+jspb.BinaryEncoder.prototype.writeZigzagVarint64 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_63) && |
+ (value < jspb.BinaryConstants.TWO_TO_63)); |
+ jspb.utils.splitZigzag64(value); |
+ this.writeSplitVarint64(jspb.utils.split64Low, |
+ jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a 8-bit unsigned integer to the buffer. Numbers outside the range |
+ * [0,2^8) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUint8 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && (value < 256)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 16-bit unsigned integer to the buffer. Numbers outside the |
+ * range [0,2^16) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUint16 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && (value < 65536)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+ this.buffer_.push((value >>> 8) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 32-bit unsigned integer to the buffer. Numbers outside the |
+ * range [0,2^32) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUint32 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && |
+ (value < jspb.BinaryConstants.TWO_TO_32)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+ this.buffer_.push((value >>> 8) & 0xFF); |
+ this.buffer_.push((value >>> 16) & 0xFF); |
+ this.buffer_.push((value >>> 24) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 64-bit unsigned integer to the buffer. Numbers outside the |
+ * range [0,2^64) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeUint64 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= 0) && |
+ (value < jspb.BinaryConstants.TWO_TO_64)); |
+ jspb.utils.splitUint64(value); |
+ this.writeUint32(jspb.utils.split64Low); |
+ this.writeUint32(jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a 8-bit integer to the buffer. Numbers outside the range |
+ * [-2^7,2^7) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeInt8 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -128) && (value < 128)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 16-bit integer to the buffer. Numbers outside the range |
+ * [-2^15,2^15) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeInt16 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -32768) && (value < 32768)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+ this.buffer_.push((value >>> 8) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 32-bit integer to the buffer. Numbers outside the range |
+ * [-2^31,2^31) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeInt32 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_31) && |
+ (value < jspb.BinaryConstants.TWO_TO_31)); |
+ this.buffer_.push((value >>> 0) & 0xFF); |
+ this.buffer_.push((value >>> 8) & 0xFF); |
+ this.buffer_.push((value >>> 16) & 0xFF); |
+ this.buffer_.push((value >>> 24) & 0xFF); |
+}; |
+ |
+ |
+/** |
+ * Writes a 64-bit integer to the buffer. Numbers outside the range |
+ * [-2^63,2^63) will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeInt64 = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_63) && |
+ (value < jspb.BinaryConstants.TWO_TO_63)); |
+ jspb.utils.splitInt64(value); |
+ this.writeUint32(jspb.utils.split64Low); |
+ this.writeUint32(jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a single-precision floating point value to the buffer. Numbers |
+ * requiring more than 32 bits of precision will be truncated. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeFloat = function(value) { |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.FLOAT32_MAX) && |
+ (value <= jspb.BinaryConstants.FLOAT32_MAX)); |
+ jspb.utils.splitFloat32(value); |
+ this.writeUint32(jspb.utils.split64Low); |
+}; |
+ |
+ |
+/** |
+ * Writes a double-precision floating point value to the buffer. As this is |
+ * the native format used by JavaScript, no precision will be lost. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeDouble = function(value) { |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.FLOAT64_MAX) && |
+ (value <= jspb.BinaryConstants.FLOAT64_MAX)); |
+ jspb.utils.splitFloat64(value); |
+ this.writeUint32(jspb.utils.split64Low); |
+ this.writeUint32(jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a boolean value to the buffer as a varint. |
+ * @param {boolean} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeBool = function(value) { |
+ goog.asserts.assert(goog.isBoolean(value)); |
+ this.buffer_.push(value ? 1 : 0); |
+}; |
+ |
+ |
+/** |
+ * Writes an enum value to the buffer as a varint. |
+ * @param {number} value The value to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeEnum = function(value) { |
+ goog.asserts.assert(value == Math.floor(value)); |
+ goog.asserts.assert((value >= -jspb.BinaryConstants.TWO_TO_31) && |
+ (value < jspb.BinaryConstants.TWO_TO_31)); |
+ this.writeSignedVarint32(value); |
+}; |
+ |
+ |
+/** |
+ * Writes an arbitrary byte array to the buffer. |
+ * @param {!Uint8Array} bytes The array of bytes to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeBytes = function(bytes) { |
+ this.buffer_.push.apply(this.buffer_, bytes); |
+}; |
+ |
+ |
+/** |
+ * Writes a 64-bit hash string (8 characters @ 8 bits of data each) to the |
+ * buffer as a varint. |
+ * @param {string} hash The hash to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeVarintHash64 = function(hash) { |
+ jspb.utils.splitHash64(hash); |
+ this.writeSplitVarint64(jspb.utils.split64Low, |
+ jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a 64-bit hash string (8 characters @ 8 bits of data each) to the |
+ * buffer as a fixed64. |
+ * @param {string} hash The hash to write. |
+ */ |
+jspb.BinaryEncoder.prototype.writeFixedHash64 = function(hash) { |
+ jspb.utils.splitHash64(hash); |
+ this.writeUint32(jspb.utils.split64Low); |
+ this.writeUint32(jspb.utils.split64High); |
+}; |
+ |
+ |
+/** |
+ * Writes a UTF16 Javascript string to the buffer encoded as UTF8. |
+ * TODO(aappleby): Add support for surrogate pairs, reject unpaired surrogates. |
+ * @param {string} value The string to write. |
+ * @return {number} The number of bytes used to encode the string. |
+ */ |
+jspb.BinaryEncoder.prototype.writeString = function(value) { |
+ var oldLength = this.buffer_.length; |
+ |
+ // UTF16 to UTF8 conversion loop swiped from goog.crypt.stringToUtf8ByteArray. |
+ for (var i = 0; i < value.length; i++) { |
+ var c = value.charCodeAt(i); |
+ if (c < 128) { |
+ this.buffer_.push(c); |
+ } else if (c < 2048) { |
+ this.buffer_.push((c >> 6) | 192); |
+ this.buffer_.push((c & 63) | 128); |
+ } else { |
+ this.buffer_.push((c >> 12) | 224); |
+ this.buffer_.push(((c >> 6) & 63) | 128); |
+ this.buffer_.push((c & 63) | 128); |
+ } |
+ } |
+ |
+ var length = this.buffer_.length - oldLength; |
+ return length; |
+}; |