holbertonschool-printf/_printf.c at main · Weebaay/holbertonschool-printf · GitHub

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#include <unistd.h>
#include <stdarg.h>
#include "main.h"
/**
 * print_number - Helper function to print an integer
 * @n: The integer to print
 */
void print_number(int n)
{
	unsigned int num = n;

	if (n < 0)
	{
		_putchar('-');
		num = -num;
	}
	if (num / 10)
		print_number(num / 10);

	_putchar((num % 10) + '0');
}
/**
 * print_unsigned_number - Helper function to print an unsigned integer
 * @n: The unsigned integer to print
 */
void print_unsigned_number(unsigned int n)
{
	if (n / 10)
		print_unsigned_number(n / 10);

	_putchar((n % 10) + '0');
}
/**
 * handle_specifier - Handles a format specifier
 * @specifier: The format specifier
 * @args: The va_list of arguments
 *
 * Return: The number of characters printed
 */
int handle_specifier(char specifier, va_list args)
{
	char *str;
	int count = 0;
	char c;
	int num;

	if (specifier == 'c')
	{
		c = va_arg(args, int);
		count += _putchar(c);
	}
	else if (specifier == 's')
	{
		str = va_arg(args, char *);
		if (!str)
			str = "(null)";
		while (*str)
			count += _putchar(*str++);
	}
	else if (specifier == '%')
	{
		count += _putchar('%');
	}
	else if (specifier == 'd' || specifier == 'i')
	{
		num = va_arg(args, int);
		print_number(num);
		if (num <= 0)
			count++;
		while (num != 0)
		{
			count++;
			num /= 10;
		}
	}
	else
	{
		count += _putchar('%');
		count += _putchar(specifier);
	}
	return count;
}
/**
 * handle_format - Handles the format string
 * @format: The format string
 * @args: The va_list of arguments
 *
 * Return: The number of characters printed
 */
int handle_format(const char *format, va_list args)
{
	int i = 0, count = 0;

	while (format && format[i])
	{
		if (format[i] == '%')
		{
			i++;
			if (format[i] == '\0')
				return (-1);
			count += handle_specifier(format[i], args);
		}
		else
		{
			count += _putchar(format[i]);
		}
		i++;
	}
	return count;
}
/**
 * _printf - Produces output according to a format
 * @format: The format string containing the characters and the specifiers
 *
 * Return: The number of characters printed (excluding the null byte used to
 * end output to strings)
 */
int _printf(const char *format, ...)
{
	va_list args;
	int count;

	if (!format)
		return (-1);

	va_start(args, format);
	count = handle_format(format, args);
	va_end(args);

	return count;
}