使用 Homebrew, apk, dnf, MacPorts, Nix, pacman, zypper, apt 安装 yajl

项目链接

• 主页
• 仓库
• 上游文档
• 软件包管理器页面

命令和别名

• json_reformat
• json_verify

项目历史

Lloyd Hilaiel's README dates the original motivation to July 2007: existing C JSON parsers did not meet his requirements for portability, robustness, useful contextual errors, incremental stream parsing, simplicity, speed, and small size. That origin explains why YAJL is callback-driven and data-representation independent rather than centered on a single DOM-like tree type.

The public GitHub repository was created in December 2008. YAJL 2 later became the main line, while the repository points legacy users to the 1.x branch. The project site publishes generated Doxygen documentation for both v2.1.0 and the previous stable v1.0.12 line.

采用历史

YAJL spread because C programs and language bindings needed a permissively licensed JSON parser that could handle large inputs, streaming data, and low-memory environments. The project site explicitly lists sample command-line tools, `json_reformat` and `json_verify`, which made the library visible to users who needed JSON validation or pretty-printing without writing C code.

Its package-manager footprint is typical of infrastructure libraries: many users encounter it indirectly through bindings, older applications, or distribution dependencies, while maintainers care about ABI stability, small binaries, and predictable parser behavior.

使用方式

Programmatic users register callbacks for JSON events, feed buffers to the parser, and build whatever in-memory representation their application wants. The generator side emits valid JSON, and the included tools reformat or verify JSON from the shell.

YAJL is especially useful where JSON arrives as a stream or where holding both the textual input and a full parsed tree would waste memory. Its design is less convenient than a high-level JSON object library, but that is the point: it is a parser core and filter substrate.

为什么软件包爱好者会关心

YAJL is package-nerd infrastructure from the early JSON boom: tiny C, callback API, command-line validators, and enough portability to show up across Unix-like distributions. It is a good example of a library whose significance is larger than its own CLI because it sits below many higher-level language bindings and tools.

时间线

• 2007-07: The README's original note explains the requirements that led Lloyd Hilaiel to create YAJL.
• 2008-12: The public GitHub repository was created.
• 2014-03: The 2.1.0 tag was committed, matching the version documented on the project site.
• YAJL 2 era: The README identifies YAJL 2 as the main line and keeps the 1.x branch for legacy users.

Related projects

• YAJL belongs with other C JSON libraries such as jansson and json-c, but differs by emphasizing SAX-style incremental parsing. Bindings such as yajl-ruby expose the same parser to higher-level languages.

来源

• https://api.github.com/repos/lloyd/yajl
• https://github.com/lloyd/yajl
• https://github.com/lloyd/yajl/blob/master/README
• https://lloyd.github.io/yajl/