mpaland/printf
Printf
This project is a lightweight C string formatting library and low-level text formatter designed for embedded systems and bare-metal hardware environments. It provides a minimal formatting engine for converting numeric types and variables into formatted text using standard specifier notation in environments that lack a full C runtime or standard library.
The library features a custom stream output utility that routes formatted text strings to user-defined callback functions. This allows for flexible output destinations and character-level writing, enabling formatted debug messages and logging on hardware without a standard system console.
The formatting capabilities cover template string generation and variable-to-text conversion, including support for integers, floating-point values, and exponential notation. It maps sequential arguments to format placeholders within a template string to produce a final text representation.
Features
- Template Formatting Engines - Provides a minimal formatting engine that uses template strings and specifiers to produce formatted text.
- Callback-Driven Output Rendering - Sends formatted output to a specific callback function to support flexible output destinations.
- Callback-Based Routing - Provides a custom stream utility to route formatted text to user-defined callback functions.
- Stream Output Management - Provides a system for directing formatted text streams to specific callback destinations.
- String Formatting Utilities - Converts numbers and variables into formatted strings using specifiers for integers and floating point.
- Template String Interpolation - Parses strings with placeholders and replaces them with numeric or string arguments.
- Bare Metal Logging - Enables the creation of formatted debug messages and logs for bare-metal embedded devices.
- Embedded Print Engines - Ships a minimal formatting engine designed for hardware environments without a standard output or runtime.
- Embedded Text Formatting - Formats variables and numbers into strings specifically for hardware environments without a standard C library.
- Low-Level Text Formatters - Provides low-level conversion of numeric types and variables into formatted text using specifier notation.
- C String Formatting Libraries - Implements a lightweight C library for formatted string printing and variable conversion.
- Format Specifier Mappings - Implements the core logic for mapping input arguments to format placeholders in template strings.
- Base Conversion Utilities - Transforms integers and numeric values between different bases using predefined specifier rules.
- Callback Stream Routing - Directs formatted text output to user-defined callback functions instead of the standard system console.
- Character-Level Writing - Enables character-level writing through low-level functions for use in resource-constrained environments.
- Formatted String Output - Provides low-level routines for converting raw data and numeric types into human-readable text.
- Formatting and Logging - Tiny, fast, and dependency-free printf implementation.
