Linux中的protobuf压缩包，解压即用，不需要自己git clone到Lilnux本地

2019-04-29 version 3.8.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Use std::atomic<int32> in case of myriad2 platform * Always declare enums to be int-sized * Added DebugString() and ShortDebugString() methods on MessageLite * Specialized different parse loop control flows * Make hasbits potentially in register. The or's start forming an obstacle because it's a read modify store on the same mem address on each iteration. * Move to an internal MACRO for parser validity checks. * Improve map parsing performance. * Make MergePartialFromCodedStream non virtual. This allows direct calls, potential inlining and is also a code health improvement * Add an overall limit to parse_context to prevent reading past it. This allows to remove a annoying level of indirection. * Fix a mistake, we shouldn't verify map key/value strings for utf8 in opt mode for proto2. * Further improvements to cut binary size. * Prepare to make MergePartialFromCodedStream non-virtual. * A report on some interesting behavior change in python (caused by b/27494216) made me realize there is a check that needs to be done in case the parse ended on a end group tag. * Add a note of caution to the comments around skip in CodedOutputStream. * Simplify end check. * Add overload for ParseMessage for MessageLite/Message types. If the explicit type is not known inlining won't help de-virtualizing the virtual call. * Reduce linker input. It turns out that ParseMessage is not inlined, producing template instantiations that are used only once and save nothing but cost more. * Improve the parser. * [c++17] Changed proto2::RepeatedPtrField iterators to no longer derive from the deprecated std::iterator class. * Change the default value of case_insensitive_enum_parsing to false for JsonStringToMessage. * Add a warning if a field name doesn't match the style guide. * Fix TextFormat not round-trip correctly when float value is max float. * Added locationed info for some errors at compiler * Python reserved keywords are now working with getattr()/setattr() for most descriptors. * Added AllowUnknownField() in text_format * Append '_' to C++ reserved keywords for message, enum, extension * Fix MSVC warning C4244 in protobuf's parse_context.h. * Updating Iterators to be compatible with C++17 in MSVC. * Use capability annotation in mutex.h * Fix "UndefinedBehaviorSanitizer: cfi-bad-type" * CriticalSectionLock class as a lightweight replacement for std::mutex on Windows platforms. * Removed vestigial wire_format_lite_inl.h C# * Added System.Memory dependency. Java * Make Java protoc code generator ignore optimize_for LITE_RUNTIME. Users should instead use the Java lite protoc plugin. * Change Extension getMessageDefaultInstance() to return Message instead of MessageLite. * Prevent malicious input streams from leaking buffers for ByteString or ByteBuffer parsing. * Release new Javalite runtime. * Show warning in case potential file name conflict. * Allow Java reserved keywords to be used in extensions. * Added setAllowUnknownFields() in text format * Add memoization to ExtensionRegistryLite.getEmptyRegistry() * Improve performance of CodedOutputStream.writeUInt32NoTag * Add an optimized mismatch-finding algorithm to UnsafeUtil. * When serializing uint32 varints, check that we have MAX_VARINT32_SIZE bytes left, not just MAX_VARINT_SIZE. * Minor optimization to RopeByteString.PieceIterator JavaScript * Simplify generated toObject code when the default value is used. Python * Changes implementation of Name() for enums that allow aliases in proto2 in Python to be in line with claims in C++ implementation (to return first value). * Added double_format option in text format printer. * Added iter and __contains__ to extension dict * Added allow_unknown_field option in python text format parser * Fixed Timestamp.ToDatetime() loses precision issue * Support unknown field in text format printer. * Float field will be convert to inf if bigger than struct.unpack('f', b'\xff\xff\x7f\x7f')[0] which is about 3.4028234664e+38, convert to -inf if smaller than -3.4028234664e+38 * Allowed casting str->bytes in Message.__setstate__ Ruby * Helper methods to get enum name for Ruby. 2019-01-24 version 3.7.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Introduced new MOMI (maybe-outside-memory-interval) parser. * Add an option to json_util to parse enum as case-insensitive. In the future, enum parsing in json_util will become case-sensitive. * Added conformance test for enum aliases * Added support for --cpp_out=speed:... * Added use of C++ override keyword where appropriate * Many other cleanups and fixes. Java * Fix illegal reflective access warning in JDK 9+ * Add BOM Python * Added Python 3.7 compatibility. * Modified ParseFromString to return bytes parsed . * Introduce Proto C API. * FindFileContainingSymbol in descriptor pool is now able to find field and enum values. * reflection.MakeClass() and reflection.ParseMessage() are deprecated. * Added DescriptorPool.FindMethodByName() method in pure python (c extension alreay has it) * Flipped proto3 to preserve unknown fields by default. * Added support for memoryview in python3 proto message parsing. * Added MergeFrom for repeated scalar fields in c extension (pure python already has it) * Surrogates are now rejected at setters in python3. * Added public unknown field API. * RecursionLimit is also set to max if allow_oversize_protos is enabled. * Disallow duplicate scalars in proto3 text_format parse. * Fix some segment faults for c extension map field. PHP * Most issues for json encoding/decoding in the c extension have been fixed. There are still some edge cases not fixed. For more details, check conformance/failure_list_php_c.txt. * Supports php 7.3 * Added helper methods to convert between enum values and names. * Allow setting/getting wrapper message fields using primitive values. * Various bug fixes. Ruby * Ruby 2.6 support. * Drops support for ruby < 2.3. * Most issues for json encoding/decoding in the c extension have been fixed. There are still some edge cases not fixed. For more details, check conformance/failure_list_ruby.txt. * Json parsing can specify an option to ignore unknown fields: msg.decode_json(data, {ignore_unknown_fields: true}). * Added support for proto2 syntax (partially). * Various bug fixes. Csharp * More support for FieldMask include merge, intersect and more. * Increasing the default recursion limit to 100. * Support loading FileDescriptors dynamically. * Provide access to comments from descriptors. * Added Any.Is method. * Compatible with C# 6 * Added IComparable and comparison operators on Timestamp. Objective C * Add ability to introspect list of enum values (#4678) * Copy the value when setting message/data fields (#5215) * Support suppressing the objc package prefix checks on a list of files (#5309) * More complete keyword and NSObject method (via categories) checks for field names, can result in more fields being rename, but avoids the collisions at runtime (#5289) * Small fixes to TextFormat generation for extensions (#5362) * Provide more details/context in deprecation messages (#5412) * Array/Dictionary enumeration blocks NS_NOESCAPE annotation for Swift (#5421) * Properly annotate extensions for ARC when their names imply behaviors (#5427) * Enum alias name collision improvements (#5480) 2018-07-27 version 3.6.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Introduced workaround for Windows issue with std::atomic and std::once_flag initialization (#4777, #4773). PHP * Added compatibility with PHP 7.3 (#4898). Ruby * Fixed Ruby crash involving Any encoding (#4718). 2018-06-01 version 3.6.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/