ft_printf/ft_printf_unicode.c at master · mfrisby/ft_printf · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf_unicode.c                                :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mfrisby <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/07/11 13:15:21 by mfrisby           #+#    #+#             */
/*   Updated: 2017/07/11 13:15:22 by mfrisby          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libftprintf.h"

static void	ft_printf_uni2(unsigned char *const buf, const unsigned int code)
{
	buf[0] = 0xF0 | (code >> 18);
	buf[1] = 0x80 | ((code >> 12) & 0x3F);
	buf[2] = 0x80 | ((code >> 6) & 0x3F);
	buf[3] = 0x80 | (code & 0x3F);
}

size_t		ft_printf_unicode(unsigned char *const buf, const unsigned int code)
{
	if (code <= 127)
	{
		buf[0] = code;
		return (1);
	}
	if (code <= 0x7FF)
	{
		buf[0] = 0xC0 | (code >> 6);
		buf[1] = 0x80 | (code & 0x3F);
		return (2);
	}
	if (code <= 0xFFFF)
	{
		buf[0] = 0xE0 | (code >> 12);
		buf[1] = 0x80 | ((code >> 6) & 0x3F);
		buf[2] = 0x80 | (code & 0x3F);
		return (3);
	}
	if (code <= 0x10FFFF)
	{
		ft_printf_uni2(buf, code);
		return (4);
	}
	return (0);
}