ft_printf/unicode.c at master · StToupin/ft_printf · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   unicode.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: stoupin <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/04/24 11:55:10 by stoupin           #+#    #+#             */
/*   Updated: 2017/04/24 12:23:09 by stoupin          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

static void		split_uint(int i, char q[4])
{
	int j;

	j = 0;
	while (j < 4)
	{
		q[j] = i & 0x3f;
		i >>= 6;
		j++;
	}
}

int				buf_put_unicode_char(t_buf *buffer, int uc)
{
	int		len;
	char	q[4];

	split_uint(uc, q);
	len = 0;
	if (uc <= 0x007f)
		len = buf_putchar(buffer, q[0] + q[1] * 0x40);
	else if (uc >= 0x0080 && uc <= 0x07ff)
		len = buf_putchar(buffer, 0xc0 + q[1])
				+ buf_putchar(buffer, 0x80 + q[0]);
	else if (uc >= 0x0800 && uc <= 0xffff)
		len = buf_putchar(buffer, 0xe0 + q[2])
				+ buf_putchar(buffer, 0x80 + q[1])
				+ buf_putchar(buffer, 0x80 + q[0]);
	else if (uc >= 0x10000 && uc <= 0x10ffff)
		len = buf_putchar(buffer, 0xf0 + q[3])
				+ buf_putchar(buffer, 0x80 + q[2])
				+ buf_putchar(buffer, 0x80 + q[1])
				+ buf_putchar(buffer, 0x80 + q[0]);
	return (len);
}

int				ft_charlen_u(int uc)
{
	if (uc <= 0x007f)
		return (1);
	else if (uc >= 0x0080 && uc <= 0x07ff)
		return (2);
	else if (uc >= 0x0800 && uc <= 0xffff)
		return (3);
	else if (uc >= 0x10000 && uc <= 0x10ffff)
		return (4);
	return (1);
}

int				ft_strlen_u(int *uc)
{
	int	len;
	int	i;

	len = 0;
	i = 0;
	while (uc[i] != 0)
	{
		len += ft_charlen_u(uc[i]);
		i++;
	}
	return (len);
}