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cJSON: Ultralightweight ANSI C JSON Parser and Printer

cJSON is an ultralightweight ANSI C JSON parser and printer. It's designed for embedded systems and situations where resources are constrained, offering a simple and efficient way to handle JSON data in C applications.

C
Added on 2025年7月6日
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cJSON: Ultralightweight ANSI C JSON Parser and Printer preview
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Project Introduction

Summary

cJSON is a robust yet simple library written in ANSI C that provides functions to parse JSON data and generate JSON output. It's single-file, making it incredibly easy to integrate into any C/C++ project with minimal setup.

Problem Solved

Existing JSON libraries in C often have significant dependencies or complex APIs, making them unsuitable for embedded systems or performance-critical applications. cJSON provides a simple, dependency-free, and efficient solution for parsing and printing JSON in pure ANSI C.

Core Features

Easy to Use API

Provides a simple API to parse JSON strings into a C structure and print C structures back into JSON strings.

Full JSON Data Type Support

Supports parsing and printing various JSON data types including objects, arrays, strings, numbers, booleans, and null.

Ultralightweight and Fast

Designed with minimal dependencies and a small memory footprint, making it ideal for resource-constrained environments.

Tech Stack

ANSI C

Use Cases

Due to its minimal footprint and simple API, cJSON is well-suited for various applications, especially where resource constraints are a factor.

Embedded Configuration Parsing

Details

Parsing configuration files stored in JSON format for embedded applications running on microcontrollers or limited hardware.

User Value

Allows flexible application configuration without the need for complex parsing logic or filesystem libraries.

IoT Device Communication

Details

Implementing communication protocols (e.g., MQTT, HTTP) on IoT devices that exchange data in JSON format.

User Value

Enables devices with limited memory/processing power to exchange structured data efficiently.

High-Performance API Integration

Details

Deserializing JSON data received from network APIs or external services directly within high-performance C applications.

User Value

Reduces overhead and latency compared to using other libraries or calling out to scripting languages for JSON handling.

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