ft_printf - Custom C Implementation of printf

The ft_printf project involves creating a simplified, custom implementation of the standard printf function in C. This library is designed to reproduce some of the core functionalities of printf, allowing for formatted output that closely mirrors the behavior of the original C library function. This project is part of the 42 School curriculum.

Project Overview

This repository includes the implementation of ft_printf, a C function that mimics the behavior of the standard printf, with the following key features and limitations:

• Function Name: ft_printf
• Prototype: int ft_printf(const char *, ...);
• Supported Conversions:
  • %c: Prints a single character.
  • %s: Prints a string.
  • %p: Prints a pointer address in hexadecimal.
  • %d: Prints a decimal (base 10) number.
  • %i: Prints an integer in base 10.
  • %u: Prints an unsigned decimal (base 10) number.
  • %x: Prints a hexadecimal number in lowercase.
  • %X: Prints a hexadecimal number in uppercase.
  • %%: Prints a percent sign.

Common Instructions

• Coding Standards: The project is implemented in C according to the 42 School’s Norm, which enforces strict formatting, structure, and error-handling conventions.
• Error Handling: Functions must avoid unexpected exits due to segmentation faults, double frees, and other common memory errors (excluding undefined behavior).
• Memory Management: All allocated memory must be properly freed, and memory leaks are not tolerated.
• Makefile Requirements:
  • The project includes a Makefile with targets: all, clean, fclean, re, and bonus.
  • Compilation flags are set to -Wall -Wextra -Werror, and the compiler used is cc.

Implementation Details

1. Library Creation: The ft_printf library, libftprintf.a, is created using the ar command (use of libtool is prohibited).
2. Project Structure: All files are located at the root level, and no unused files are included.
3. Bonus Part: Additional features may be implemented in bonus files, following 42’s guidelines (e.g., naming files _bonus.c).

External Functions Used

• The implementation is allowed to use: malloc, free, write, and the variadic argument functions (va_start, va_arg, va_copy, va_end).