/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf_decimal.c                                :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jguelen <jguelen@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/18 10:52:39 by jguelen           #+#    #+#             */
/*   Updated: 2025/02/04 09:56:04 by jguelen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

static int	ft_display_absint(int fd, int n)
{
	int		i;
	int		calc;
	char	buf[20];
	int		j;

	i = 0;
	calc = n;
	j = 19;
	if (n == 0)
		return (write(fd, "0", 1));
	while (calc != 0)
	{
		buf[j] = (calc % 10) * (1 - 2 * (n < 0)) + '0';
		calc /= 10;
		j--;
		i++;
	}
	return (write(fd, buf + j + 1, i));
}

static int	ft_printf_putint(int fd, t_printf_format *format)
{
	int		i;
	int		calc;

	calc = format->var.i;
	i = ft_int_len(calc, 10);
	if (format->var.i < 0 && write(fd, "-", 1) == -1)
		return (-1);
	while ((format->flags & PRINTF_DOTFLAG) && (i++ < format->precision))
	{
		if (write(fd, "0", 1) == -1)
			return (-1);
	}
	if (((format->flags & PRINTF_DOTFLAG) && (format->precision == 0))
		&& (format->var.i == 0))
		return (0);
	return (ft_display_absint(fd, calc) + (format->var.i < 0));
}

int	ft_printf_int(int fd, t_printf_format *format)
{
	if (format->var.i < 0)
		format->total_len++;
	if ((format->flags & PRINTF_DOTFLAG) && (format->precision == 0)
		&& (format->var.i == 0))
		format->total_len = 0;
	if ((format->flags & ~PRINTF_MINUSFLAG) == format->flags)
	{
		if ((format->flags & ~PRINTF_ZEROFLAG) == format->flags
			&& ft_pad_char(fd, format, " ") == -1)
			return (-1);
		else if (format->flags & PRINTF_ZEROFLAG)
		{
			format->precision = max_int(max_int((int)format->minwidth,
						format->precision), 1) - (format->var.i < 0);
			format->total_len = max_int((int)format->minwidth,
					format->total_len);
			format->flags |= PRINTF_DOTFLAG;
		}
	}
	if (ft_printf_str(fd, format->prefix, INT_MAX) == -1
		|| ft_printf_putint(fd, format) == -1)
		return (-1);
	return (ft_pad_char(fd, format, " "));
}

/*base is presumed to be a valid base and base_len to be its number
of "digits"*/
int	ft_printf_putuint_base(int fd, t_printf_format *format, char *base,
								int base_len)
{
	unsigned int	calc;
	char			buf[20];
	int				i;

	calc = format->var.u;
	i = ft_uint_len(calc, 10);
	while (i++ < format->precision)
	{
		if (write(fd, "0", 1) == -1)
			return (-1);
	}
	i = 19;
	if ((format->flags & PRINTF_DOTFLAG) && (format->precision == 0)
		&& (format->var.u == 0))
		return (0);
	if (calc == 0)
		return (write(fd, "0", 1));
	while (calc)
	{
		buf[i] = base[calc % base_len];
		calc /= base_len;
		i--;
	}
	return (write(fd, buf + i + 1, 19 - i));
}

int	ft_printf_uint(int fd, t_printf_format *format)
{
	if ((format->flags & PRINTF_DOTFLAG) && (format->precision == 0)
		&& (format->var.u == 0))
		format->total_len = 0;
	if ((format->flags & ~PRINTF_MINUSFLAG) == format->flags)
	{
		if ((format->flags & ~PRINTF_ZEROFLAG) == format->flags
			&& ft_pad_char(fd, format, " ") == -1)
			return (-1);
		else if (ft_pad_char(fd, format, "0") == -1)
			return (-1);
	}
	if (ft_printf_putuint_base(fd, format, "0123456789", 10) == -1)
		return (-1);
	return (ft_pad_char(fd, format, " "));
}