42_libft/ft_isnum.c at master · grignetta/42_libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_isnum.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mmasarov <mmasarov@student.42vienna.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/03 14:12:39 by mmasarov          #+#    #+#             */
/*   Updated: 2024/10/03 14:12:41 by mmasarov         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_isnum(char *str)
{
	int	has_digit;

	has_digit = 0;
	while (ft_isspace(*str))
		str++;
	if (*str == '+' || *str == '-')
		str++;
	while (ft_isdigit(*str))
	{
		has_digit = 1;
		str++;
	}
	if (*str == '.')
	{
		str++;
		while (ft_isdigit(*str))
		{
			has_digit = 1;
			str++;
		}
	}
	while (ft_isspace(*str))
		str++;
	return (*str == '\0' && has_digit);
}