Frozen

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frozen is a Coding & Development tool that provides a JSON parser and generator for C/C++ with a scanf/printf-like interface. It targets embedded systems with a small footprint and no dependencies.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Yes

Skill level

Technical

About

What is frozen?

frozen is a robust JSON parser and generator specifically designed for C/C++ applications, emphasizing efficiency and a minimal footprint. It offers a familiar scanf/printf-like interface for easy integration and use, making it particularly suitable for embedded systems where resources are often constrained. The tool is ISO C and ISO C++ compliant, ensuring broad compatibility. Key functionalities include `json_scanf()` for parsing JSON strings into C/C++ variables, `json_printf()` for generating JSON output, and `json_setf()` for modifying existing JSON strings. It also supports reading and writing JSON to files, and includes built-in base64 encoding/decoding. With 100% test coverage and no external dependencies, frozen provides a reliable and lightweight solution for JSON manipulation in performance-critical environments.

Best used for

Ideal for developers who need to efficiently parse and generate JSON data in C/C++ applications, especially for embedded systems. It is valuable for tasks like handling configuration files, serializing data for communication, and dynamically modifying JSON structures with a familiar interface.

Common actions

parse JSON

generate JSON

manipulate JSON data

serialize C/C++ data

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Capabilities

Key features

JSON parser
JSON generator
scanf/printf-like interface
Small footprint
No dependencies
Base64 encoder/decoder
File I/O

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What are the core differences between json_scanf() and json_walk()?

json_scanf() provides a high-level, scanf-like interface for direct conversion of JSON strings into C/C++ variables. In contrast, json_walk() offers a low-level, callback-based API that processes JSON tokens sequentially, similar to SAX parsers, allowing for custom handling of each element.

Can frozen be used to modify existing JSON strings?

Yes, frozen includes the `json_setf()` function, which allows you to update a given JSON string by changing the value at a specified JSON path. It can also add missing keys or push values to arrays if the path is not present.

Does frozen support binary data within JSON?

Yes, frozen provides built-in support for handling binary data. It includes functionalities for base64 encoding and decoding, allowing you to embed and extract binary information within your JSON structures efficiently.

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