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diff --git a/src/s3select/rapidjson/readme.md b/src/s3select/rapidjson/readme.md new file mode 100644 index 000000000..ac683b051 --- /dev/null +++ b/src/s3select/rapidjson/readme.md @@ -0,0 +1,210 @@ + + + + +## A fast JSON parser/generator for C++ with both SAX/DOM style API + +Tencent is pleased to support the open source community by making RapidJSON available. + +Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. + +* [RapidJSON GitHub](https://github.com/Tencent/rapidjson/) +* RapidJSON Documentation + * [English](http://rapidjson.org/) + * [简体中文](http://rapidjson.org/zh-cn/) + * [GitBook](https://www.gitbook.com/book/miloyip/rapidjson/) with downloadable PDF/EPUB/MOBI, without API reference. + +## Build status + +| [Linux][lin-link] | [Windows][win-link] | [Coveralls][cov-link] | +| :---------------: | :-----------------: | :-------------------: | +| ![lin-badge] | ![win-badge] | ![cov-badge] | + +[lin-badge]: https://travis-ci.org/Tencent/rapidjson.svg?branch=master "Travis build status" +[lin-link]: https://travis-ci.org/Tencent/rapidjson "Travis build status" +[win-badge]: https://ci.appveyor.com/api/projects/status/l6qulgqahcayidrf/branch/master?svg=true "AppVeyor build status" +[win-link]: https://ci.appveyor.com/project/miloyip/rapidjson-0fdqj/branch/master "AppVeyor build status" +[cov-badge]: https://coveralls.io/repos/Tencent/rapidjson/badge.svg?branch=master "Coveralls coverage" +[cov-link]: https://coveralls.io/r/Tencent/rapidjson?branch=master "Coveralls coverage" + +## Introduction + +RapidJSON is a JSON parser and generator for C++. It was inspired by [RapidXml](http://rapidxml.sourceforge.net/). + +* RapidJSON is **small** but **complete**. It supports both SAX and DOM style API. The SAX parser is only a half thousand lines of code. + +* RapidJSON is **fast**. Its performance can be comparable to `strlen()`. It also optionally supports SSE2/SSE4.2 for acceleration. + +* RapidJSON is **self-contained** and **header-only**. It does not depend on external libraries such as BOOST. It even does not depend on STL. + +* RapidJSON is **memory-friendly**. Each JSON value occupies exactly 16 bytes for most 32/64-bit machines (excluding text string). By default it uses a fast memory allocator, and the parser allocates memory compactly during parsing. + +* RapidJSON is **Unicode-friendly**. It supports UTF-8, UTF-16, UTF-32 (LE & BE), and their detection, validation and transcoding internally. For example, you can read a UTF-8 file and let RapidJSON transcode the JSON strings into UTF-16 in the DOM. It also supports surrogates and "\u0000" (null character). + +More features can be read [here](doc/features.md). + +JSON(JavaScript Object Notation) is a light-weight data exchange format. RapidJSON should be in full compliance with RFC7159/ECMA-404, with optional support of relaxed syntax. More information about JSON can be obtained at +* [Introducing JSON](http://json.org/) +* [RFC7159: The JavaScript Object Notation (JSON) Data Interchange Format](https://tools.ietf.org/html/rfc7159) +* [Standard ECMA-404: The JSON Data Interchange Format](https://www.ecma-international.org/publications/standards/Ecma-404.htm) + +## Highlights in v1.1 (2016-8-25) + +* Added [JSON Pointer](doc/pointer.md) +* Added [JSON Schema](doc/schema.md) +* Added [relaxed JSON syntax](doc/dom.md) (comment, trailing comma, NaN/Infinity) +* Iterating array/object with [C++11 Range-based for loop](doc/tutorial.md) +* Reduce memory overhead of each `Value` from 24 bytes to 16 bytes in x86-64 architecture. + +For other changes please refer to [change log](CHANGELOG.md). + +## Compatibility + +RapidJSON is cross-platform. Some platform/compiler combinations which have been tested are shown as follows. +* Visual C++ 2008/2010/2013 on Windows (32/64-bit) +* GNU C++ 3.8.x on Cygwin +* Clang 3.4 on Mac OS X (32/64-bit) and iOS +* Clang 3.4 on Android NDK + +Users can build and run the unit tests on their platform/compiler. + +## Installation + +RapidJSON is a header-only C++ library. Just copy the `include/rapidjson` folder to system or project's include path. + +Alternatively, if you are using the [vcpkg](https://github.com/Microsoft/vcpkg/) dependency manager you can download and install rapidjson with CMake integration in a single command: +* vcpkg install rapidjson + +RapidJSON uses following software as its dependencies: +* [CMake](https://cmake.org/) as a general build tool +* (optional) [Doxygen](http://www.doxygen.org) to build documentation +* (optional) [googletest](https://github.com/google/googletest) for unit and performance testing + +To generate user documentation and run tests please proceed with the steps below: + +1. Execute `git submodule update --init` to get the files of thirdparty submodules (google test). +2. Create directory called `build` in rapidjson source directory. +3. Change to `build` directory and run `cmake ..` command to configure your build. Windows users can do the same with cmake-gui application. +4. On Windows, build the solution found in the build directory. On Linux, run `make` from the build directory. + +On successful build you will find compiled test and example binaries in `bin` +directory. The generated documentation will be available in `doc/html` +directory of the build tree. To run tests after finished build please run `make +test` or `ctest` from your build tree. You can get detailed output using `ctest +-V` command. + +It is possible to install library system-wide by running `make install` command +from the build tree with administrative privileges. This will install all files +according to system preferences. Once RapidJSON is installed, it is possible +to use it from other CMake projects by adding `find_package(RapidJSON)` line to +your CMakeLists.txt. + +## Usage at a glance + +This simple example parses a JSON string into a document (DOM), make a simple modification of the DOM, and finally stringify the DOM to a JSON string. + +~~~~~~~~~~cpp +// rapidjson/example/simpledom/simpledom.cpp` +#include "rapidjson/document.h" +#include "rapidjson/writer.h" +#include "rapidjson/stringbuffer.h" +#include <iostream> + +using namespace rapidjson; + +int main() { + // 1. Parse a JSON string into DOM. + const char* json = "{\"project\":\"rapidjson\",\"stars\":10}"; + Document d; + d.Parse(json); + + // 2. Modify it by DOM. + Value& s = d["stars"]; + s.SetInt(s.GetInt() + 1); + + // 3. Stringify the DOM + StringBuffer buffer; + Writer<StringBuffer> writer(buffer); + d.Accept(writer); + + // Output {"project":"rapidjson","stars":11} + std::cout << buffer.GetString() << std::endl; + return 0; +} +~~~~~~~~~~ + +Note that this example did not handle potential errors. + +The following diagram shows the process. + + + +More [examples](https://github.com/Tencent/rapidjson/tree/master/example) are available: + +* DOM API + * [tutorial](https://github.com/Tencent/rapidjson/blob/master/example/tutorial/tutorial.cpp): Basic usage of DOM API. + +* SAX API + * [simplereader](https://github.com/Tencent/rapidjson/blob/master/example/simplereader/simplereader.cpp): Dumps all SAX events while parsing a JSON by `Reader`. + * [condense](https://github.com/Tencent/rapidjson/blob/master/example/condense/condense.cpp): A command line tool to rewrite a JSON, with all whitespaces removed. + * [pretty](https://github.com/Tencent/rapidjson/blob/master/example/pretty/pretty.cpp): A command line tool to rewrite a JSON with indents and newlines by `PrettyWriter`. + * [capitalize](https://github.com/Tencent/rapidjson/blob/master/example/capitalize/capitalize.cpp): A command line tool to capitalize strings in JSON. + * [messagereader](https://github.com/Tencent/rapidjson/blob/master/example/messagereader/messagereader.cpp): Parse a JSON message with SAX API. + * [serialize](https://github.com/Tencent/rapidjson/blob/master/example/serialize/serialize.cpp): Serialize a C++ object into JSON with SAX API. + * [jsonx](https://github.com/Tencent/rapidjson/blob/master/example/jsonx/jsonx.cpp): Implements a `JsonxWriter` which stringify SAX events into [JSONx](https://www-01.ibm.com/support/knowledgecenter/SS9H2Y_7.1.0/com.ibm.dp.doc/json_jsonx.html) (a kind of XML) format. The example is a command line tool which converts input JSON into JSONx format. + +* Schema + * [schemavalidator](https://github.com/Tencent/rapidjson/blob/master/example/schemavalidator/schemavalidator.cpp) : A command line tool to validate a JSON with a JSON schema. + +* Advanced + * [prettyauto](https://github.com/Tencent/rapidjson/blob/master/example/prettyauto/prettyauto.cpp): A modified version of [pretty](https://github.com/Tencent/rapidjson/blob/master/example/pretty/pretty.cpp) to automatically handle JSON with any UTF encodings. + * [parsebyparts](https://github.com/Tencent/rapidjson/blob/master/example/parsebyparts/parsebyparts.cpp): Implements an `AsyncDocumentParser` which can parse JSON in parts, using C++11 thread. + * [filterkey](https://github.com/Tencent/rapidjson/blob/master/example/filterkey/filterkey.cpp): A command line tool to remove all values with user-specified key. + * [filterkeydom](https://github.com/Tencent/rapidjson/blob/master/example/filterkeydom/filterkeydom.cpp): Same tool as above, but it demonstrates how to use a generator to populate a `Document`. + +## Contributing + +RapidJSON welcomes contributions. When contributing, please follow the code below. + +### Issues + +Feel free to submit issues and enhancement requests. + +Please help us by providing **minimal reproducible examples**, because source code is easier to let other people understand what happens. +For crash problems on certain platforms, please bring stack dump content with the detail of the OS, compiler, etc. + +Please try breakpoint debugging first, tell us what you found, see if we can start exploring based on more information been prepared. + +### Workflow + +In general, we follow the "fork-and-pull" Git workflow. + + 1. **Fork** the repo on GitHub + 2. **Clone** the project to your own machine + 3. **Checkout** a new branch on your fork, start developing on the branch + 4. **Test** the change before commit, Make sure the changes pass all the tests, including `unittest` and `preftest`, please add test case for each new feature or bug-fix if needed. + 5. **Commit** changes to your own branch + 6. **Push** your work back up to your fork + 7. Submit a **Pull request** so that we can review your changes + +NOTE: Be sure to merge the latest from "upstream" before making a pull request! + +### Copyright and Licensing + +You can copy and paste the license summary from below. + +``` +Tencent is pleased to support the open source community by making RapidJSON available. + +Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. + +Licensed under the MIT License (the "License"); you may not use this file except +in compliance with the License. You may obtain a copy of the License at + +http://opensource.org/licenses/MIT + +Unless required by applicable law or agreed to in writing, software distributed +under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR +CONDITIONS OF ANY KIND, either express or implied. See the License for the +specific language governing permissions and limitations under the License. +``` |