isnum_from_str.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   isnum_from_str.c                                   :+:      :+:    :+:   */
/*                                                     +:+ +:+         +:+    */
/*   By: rmikhayl <rmikhayl@student.42london.ac.uk>  +#+  +:+       +#+       */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/12/17 17:25:27 by rmikhayl          #+#    #+#             */
/*   Updated: 2024/04/15 16:46:47 by rocky            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "libft.h"
 
int isnum_from_str(const char *str)
{
    if (!str || *str == '\0')
        return (0);
    if (*str == '-' || *str == '+')
    {
        str++;
        if (*str == '\0')
            return (0);
    }
    while (*str)
    {
        if (*str < '0' || *str > '9')
            return (0);
        str++;
    }
    return (1);
}