Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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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 64-bit integer in 32:32 split representation into its wire-format
* fixed 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.writeSplitFixed64 = 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));
this.writeUint32(lowBits);
this.writeUint32(highBits);
};
/**
* 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);
};
/**
* Encodes a JavaScript decimal string into its wire-format, zigzag-encoded
* varint representation and stores it in the buffer. Integers not representable
* in 64 bits will be truncated.
* @param {string} value The integer to convert.
*/
jspb.BinaryEncoder.prototype.writeZigzagVarint64String = function(value) {
// TODO(haberman): write lossless 64-bit zig-zag math.
this.writeZigzagVarint64(parseInt(value, 10));
};
/**
* 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.writeSplitFixed64(jspb.utils.split64Low, jspb.utils.split64High);
};
/**
* Writes a 64-bit integer decimal strings to the buffer. Numbers outside the
* range [-2^63,2^63) will be truncated.
* @param {string} value The value to write.
*/
jspb.BinaryEncoder.prototype.writeInt64String = 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.splitHash64(jspb.utils.decimalStringToHash64(value));
this.writeSplitFixed64(jspb.utils.split64Low, 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;
Merge 3.2.x branch into master (#2648) * Down-integrate internal changes to github. * Update conformance test failure list. * Explicitly import used class in nano test to avoid random test fail. * Update _GNUC_VER to use the correct implementation of atomic operation on Mac. * maps_test.js: check whether Symbol is defined before using it (#2524) Symbol is not yet available on older versions of Node.js and so this test fails with them. This change just directly checks whether Symbol is available before we try to use it. * Added well_known_types_embed.cc to CLEANFILES so that it gets cleaned up * Updated Makefile.am to fix out-of-tree builds * Added Bazel genrule for generating well_known_types_embed.cc In pull request #2517 I made this change for the CMake and autotools builds but forgot to do it for the Bazel build. * Update _GNUC_VER to use the correct implementation of atomic operation on Mac. * Add new js file in extra dist. * Bump version number to 3.2.0 * Fixed issue with autoloading - Invalid paths (#2538) * PHP fix int64 decoding (#2516) * fix int64 decoding * fix int64 decoding + tests * Fix int64 decoding on 32-bit machines. * Fix warning in compiler/js/embed.cc embed.cc: In function ‘std::string CEscape(const string&)’: embed.cc:51:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < str.size(); ++i) { ^ * Fix include in auto-generated well_known_types_embed.cc Restore include style fix (e3da722) that has been trampled by auto-generation of well_known_types_embed.cc * Fixed cross compilations with the Autotools build Pull request #2517 caused cross compilations to start failing, because the js_embed binary was being built to run on the target platform instead of on the build machine. This change updates the Autotools build to use the AX_PROG_CXX_FOR_BUILD macro to find a suitable compiler for the build machine and always use that when building js_embed. * Minor fix for autocreated object repeated fields and maps. - If setting/clearing a repeated field/map that was objects, check the class before checking the autocreator. - Just to be paranoid, don’t mutate within copy/mutableCopy for the autocreated classes to ensure there is less chance of issues if someone does something really crazy threading wise. - Some more tests for the internal AutocreatedArray/AutocreatedDictionary classes to ensure things are working as expected. - Add Xcode 8.2 to the full_mac_build.sh supported list. * Fix generation of extending nested messages in JavaScript (#2439) * Fix generation of extending nested messages in JavaScript * Added missing test8.proto to build * Fix generated code when there is no namespace but there is enum definition. * Decoding unknown field should succeed. * Add embed.cc in src/Makefile.am to fix dist check. * Fixed "make distcheck" for the Autotools build To make the test pass I needed to fix out-of-tree builds and update EXTRA_DIST and CLEANFILES. * Remove redundent embed.cc from src/Makefile.am * Update version number to 3.2.0-rc.1 (#2578) * Change protoc-artifacts version to 3.2.0-rc.1 * Update version number to 3.2.0rc2 * Update change logs for 3.2.0 release. * Update php README * Update upb, fixes some bugs (including a hash table problem). (#2611) * Update upb, fixes some bugs (including a hash table problem). * Ruby: added a test for the previous hash table corruption. Verified that this triggers the bug in the currently released version. * Ruby: bugfix for SEGV. * Ruby: removed old code for dup'ing defs. * Reverting deployment target to 7.0 (#2618) The Protobuf library doesn’t require the 7.1 deployment target so reverting it back to 7.0 * Fix typo that breaks builds on big-endian (#2632) * Bump version number to 3.2.0
8 years ago
for (var i = 0; i < value.length; i++) {
Merge 3.2.x branch into master (#2648) * Down-integrate internal changes to github. * Update conformance test failure list. * Explicitly import used class in nano test to avoid random test fail. * Update _GNUC_VER to use the correct implementation of atomic operation on Mac. * maps_test.js: check whether Symbol is defined before using it (#2524) Symbol is not yet available on older versions of Node.js and so this test fails with them. This change just directly checks whether Symbol is available before we try to use it. * Added well_known_types_embed.cc to CLEANFILES so that it gets cleaned up * Updated Makefile.am to fix out-of-tree builds * Added Bazel genrule for generating well_known_types_embed.cc In pull request #2517 I made this change for the CMake and autotools builds but forgot to do it for the Bazel build. * Update _GNUC_VER to use the correct implementation of atomic operation on Mac. * Add new js file in extra dist. * Bump version number to 3.2.0 * Fixed issue with autoloading - Invalid paths (#2538) * PHP fix int64 decoding (#2516) * fix int64 decoding * fix int64 decoding + tests * Fix int64 decoding on 32-bit machines. * Fix warning in compiler/js/embed.cc embed.cc: In function ‘std::string CEscape(const string&)’: embed.cc:51:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < str.size(); ++i) { ^ * Fix include in auto-generated well_known_types_embed.cc Restore include style fix (e3da722) that has been trampled by auto-generation of well_known_types_embed.cc * Fixed cross compilations with the Autotools build Pull request #2517 caused cross compilations to start failing, because the js_embed binary was being built to run on the target platform instead of on the build machine. This change updates the Autotools build to use the AX_PROG_CXX_FOR_BUILD macro to find a suitable compiler for the build machine and always use that when building js_embed. * Minor fix for autocreated object repeated fields and maps. - If setting/clearing a repeated field/map that was objects, check the class before checking the autocreator. - Just to be paranoid, don’t mutate within copy/mutableCopy for the autocreated classes to ensure there is less chance of issues if someone does something really crazy threading wise. - Some more tests for the internal AutocreatedArray/AutocreatedDictionary classes to ensure things are working as expected. - Add Xcode 8.2 to the full_mac_build.sh supported list. * Fix generation of extending nested messages in JavaScript (#2439) * Fix generation of extending nested messages in JavaScript * Added missing test8.proto to build * Fix generated code when there is no namespace but there is enum definition. * Decoding unknown field should succeed. * Add embed.cc in src/Makefile.am to fix dist check. * Fixed "make distcheck" for the Autotools build To make the test pass I needed to fix out-of-tree builds and update EXTRA_DIST and CLEANFILES. * Remove redundent embed.cc from src/Makefile.am * Update version number to 3.2.0-rc.1 (#2578) * Change protoc-artifacts version to 3.2.0-rc.1 * Update version number to 3.2.0rc2 * Update change logs for 3.2.0 release. * Update php README * Update upb, fixes some bugs (including a hash table problem). (#2611) * Update upb, fixes some bugs (including a hash table problem). * Ruby: added a test for the previous hash table corruption. Verified that this triggers the bug in the currently released version. * Ruby: bugfix for SEGV. * Ruby: removed old code for dup'ing defs. * Reverting deployment target to 7.0 (#2618) The Protobuf library doesn’t require the 7.1 deployment target so reverting it back to 7.0 * Fix typo that breaks builds on big-endian (#2632) * Bump version number to 3.2.0
8 years ago
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 if (c < 65536) {
// Look for surrogates
if (c >= 0xD800 && c <= 0xDBFF && i + 1 < value.length) {
var second = value.charCodeAt(i + 1);
if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
// http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
c = (c - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
this.buffer_.push((c >> 18) | 240);
this.buffer_.push(((c >> 12) & 63 ) | 128);
this.buffer_.push(((c >> 6) & 63) | 128);
this.buffer_.push((c & 63) | 128);
i++;
}
}
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;
};