iterate_flags.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   iterate_flags.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: abkssiba <abkssiba@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/12/04 12:54:05 by abkssiba          #+#    #+#             */
/*   Updated: 2019/12/13 17:41:07 by abkssiba         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

int		is_specifier(char c)
{
	if (c == 'c' || c == 's' || c == '%')
		return (1);
	if (c == 'p' || c == 'd' || c == 'i' || c == 'u'
			|| c == 'x' || c == 'X')
		return (1);
	return (0);
}

int		is_not_specifier(char c)
{
	char	*tmp;
	int		i;

	i = 0;
	tmp = "abefghjklmnoqrtvwyz%";
	while (tmp[i])
	{
		if (tmp[i] == c)
			return (1);
		i++;
	}
	return (0);
}

void	initialize_flags(t_flags *flg)
{
	flg->minus = 0;
	flg->zero = 0;
	flg->width = 0;
	flg->precision = -1;
	flg->specifier = 0;
	flg->skip_flags = 0;
}

void	manage_flag(const char *str, t_flags *flg, char c, int i)
{
	if (is_not_specifier(str[i]))
		flg->specifier = str[i];
	flg->skip_flags = i;
	if (flg->minus && flg->zero)
		flg->zero = 0;
	if (is_specifier(c))
		flg->specifier = c;
	if (flg->specifier == 's')
		flg->zero = 0;
	if (flg->width < 0)
	{
		flg->width *= -1;
		flg->minus = 1;
	}
	if ((flg->precision >= 0 && flg->specifier == 'c') || flg->specifier == 'p')
		flg->precision = -1;
	if ((flg->precision == -1 && flg->zero && flg->width) &&
			(flg->specifier == 'x' || flg->specifier == 'x'))
		flg->precision = flg->width;
}

int	g_i;

void	get_flags(const char *str, va_list *arg, t_flags *flg)
{
	g_i = 1;
	while (!is_specifier(str[g_i]) && !is_not_specifier(str[g_i]) && str[g_i])
	{
		if (str[g_i] == '-')
			flg->minus = 1;
		else if (str[g_i] == '0' && str[g_i - 1] == '%')
			flg->zero = 1;
		else if ((str[g_i] == '*' && (str[g_i - 1] == '%' || str[g_i - 1] == '-'
				|| str[g_i - 1] == '0' || ft_isdigit(str[g_i - 1])))
				|| (str[g_i] == '*' && str[g_i + 1] == '.'))
			flg->width = va_arg(*arg, int);
		else if (str[g_i] == '*' && str[g_i - 1] == '.')
			flg->precision = va_arg(*arg, int);
		else if (str[g_i] == '.' && str[g_i + 1] != '*')
			flg->precision = ft_atoi(str + g_i + 1);
		else if (((!flg->width) && (str[g_i - 1] == '%' || str[g_i - 1] == '-'
	|| str[g_i - 1] == '0')) || (!flg->width && ft_isdigit(str[g_i])
	&& str[g_i - 1] != '.') || (str[g_i - 1] == '*' && ft_isdigit(str[g_i])))
			flg->width = ft_atoi(str + g_i);
		if (flg->width < 0 && flg->minus == 0)
			flg->minus = 1;
		g_i++;
	}
	manage_flag(str, flg, str[g_i], g_i);
}