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libft/printf/ft_arglen.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_arglen.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: igarbuz <marvin@42.fr>                     +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/01/24 13:04:12 by igarbuz           #+#    #+#             */
+/*   Updated: 2019/01/24 13:04:16 by igarbuz          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_printf.h"
+
+static int		ft_unbrlen(uintmax_t n)
+{
+	int i;
+
+	i = 1;
+	while (n && n > 9)
+	{
+		n = n / 10;
+		i++;
+	}
+	return (i);
+}
+
+static int		ft_snbrlen(intmax_t n)
+{
+	if (n < 0)
+		return (ft_unbrlen(-n));
+	return (ft_unbrlen(n));
+}
+
+static int		ft_hexlen(uintmax_t x)
+{
+	int i;
+
+	i = 1;
+	while (x > 15)
+	{
+		x = (x >> 4);
+		i++;
+	}
+	return (i);
+}
+
+/*
+** For string length, if an argument is an integer Zero, "(null)" is printed
+** that corresponds to below returned precision of 6;
+*/
+
+int				ft_arg_len(intmax_t arg, char c, t_param *prm)
+{
+	if (c == 'c' || c == '%')
+		return (1);
+	else if (!arg && !prm->prc && c != 'o')
+		return (0);
+	else if (c == 'd' || c == 'i')
+		return (ft_snbrlen((intmax_t)arg));
+	else if (c == 'u')
+		return (ft_unbrlen((uintmax_t)arg));
+	else if (c == 'o')
+		return (ft_arg_len_oct(arg, prm));
+	else if (c == 'x' || c == 'X')
+		return (ft_hexlen((uintmax_t)arg));
+	else if (c == 'p')
+		return (ft_hexlen((uintmax_t)arg));
+	else if (c == 's' && prm->p >> 7 & 1)
+		return (ft_strlen_unicode((wchar_t *)arg));
+	else if (c == 's')
+		return (ft_strlen_printf((char *)arg));
+	return (0);
+}