Single-Header Print Library

This is a lightweight, format-string based printing library implemented as a single header file. It provides printf-like functionality without depending on the standard C library, making it suitable for use in embedded systems or other environments where the full C standard library is not available.

Features

• Format string based printing similar to printf
• Support for basic types: integers, unsigned integers, hexadecimal, binary, floats, characters, and strings
• Custom type support allowing users to define their own print functions for complex types
• Single header file implementation for easy integration
• No dependencies on the standard C library (except for va_list and basic types)

Usage

1. Copy print.h into your project directory.

2. In one C file in your project, define PRINT_IMPLEMENTATION before including print.h:

   #define PRINT_IMPLEMENTATION
   #include "print.h"

3. In all other C files that use the library, just include print.h:

   #include "print.h"

4. Implement the _putchar function for your specific environment:

   void _putchar(char c) {
       // Implementation depends on your system
       // For example, on Unix-like systems:
       write(STDOUT_FILENO, &c, 1);
   }

5. Use the print function in your code:

   print("Hello, {s}! The answer is {d}.\n", "world", 42);

Custom Types

You can register custom print functions for your own types:

typedef struct {
    int x;
    int y;
} Point;

void print_point(const void* data) {
    const Point* p = (const Point*)data;
    print("({}, {})", p->x, p->y);
}

int main() {
    register_custom_type("Point", print_point);
    Point p = {10, 20};
    print("Point: {:Point}\n", &p);
    return 0;
}

Format Specifiers

• {d} or {}: int
• {u}: unsigned int
• {x}: hexadecimal
• {b}: binary
• {f}: float or double
• {s}: string
• {c}: char
• {p}: pointer
• {:typename}: custom type

License

This library is released under the MIT License. See the LICENSE file for details.