ft_printf

Ft_printf is a variadic function that recreates much of printf's functionalities.

Contents

Language & Functions Used | Installation & Usage | Format Specification Fields

Language & Functions Used

The ft_printf function is written in C, using only the following functions from the standard C libraries:

• write
• stdarg

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Installation & Usage

Step 1 - clone the repo at the root of your project folder

$ git clone https://github.com/serena-zhu/ft_printf.git

Step 2 - compile library

$ make

The Makefile will compile a static library called libftprintf.a, which can be compiled with your program source files as follows:

$ gcc -Wall -Wextra -Werror -o program_name source_file -L ./ft_printf -lftprintf

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Format Specification Fields

Flags

• #
• 0
• -
• +
• space
• '

Minimum Field Width

• # [given as any hardcoded number e.g. ft_printf("%4d\n", number);]
• * [given as a variable e.g. ft_printf("%*d\n", 4, number); Note: if a negative number is provided, the absolute value will be used and a '-' flag will be added]

Precision

• .# [given as any hardcoded number e.g. ft_printf("%.2f\n", number);]
• .* [given as a variable e.g. ft_printf("%.*f\n", 2, number);]

Length modifiers

• hh
• h
• l
• ll
• j
• z
• L

Conversion Specifiers

• s, S
• p
• d, D, i
• o, O
• u, U
• x, X
• c, C
• e, E
• f, F
• g, G
• n

Color Management

This function includes a color management functionality that is different from printf.

To use: specify colors in between {} and end color with {eoc}. If the closing bracket } is missing, the opening bracket { and the texts that follow will be printed to standard output.

Example:

$ cat main.c

#include "ft_printf.h"

int	main(void)
{
	ft_printf("This will be{red} red text {eoc}and now the text color is back to default.\n");
	return (0);
}
$ gcc -Wall -Wextra -Werror main.c -L ./ft_printf -lftprintf
$ ./a.out

Supported colors are:

• black | red | green | yellow | blue | magenta | cyan | white | gray
• light red | light green | light yellow | light blue | light magenta | light cyan

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