sudoku GOTY Edition

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   main.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: squiana <[email protected]>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/07/14 19:50:13 by squiana           #+#    #+#             */
/*   Updated: 2019/07/14 22:37:21 by squiana          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <unistd.h>

int     test_symbol(int n, char **tab);
int     sudoky(int place, char **tab);
void    display(char **tab);
int     only_one(char **tab);

int     main(int argc, char **argv)
{
    if (test_symbol(argc, argv) + only_one(argv) == 2)
    {
        if (sudoky(9, argv))
            display(argv);
        else
            write(1, "Error\n", 6);
    }
    else
        write(1, "Error\n", 6);
    return (0);
}
/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   test.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: squiana <[email protected]>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/07/14 20:44:39 by squiana           #+#    #+#             */
/*   Updated: 2019/07/14 22:55:30 by squiana          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

int     test_line(char **tab, char nb, int i)
{
    int j;

    j = 0;
    while (j < 9)
    {
        if (tab[i][j] == nb)
            return (0);
        j++;
    }
    return (1);
}

int     test_column(char **tab, char nb, int j)
{
    int i;

    i = 1;
    while (i <= 9)
    {
        if (tab[i][j] == nb)
            return (0);
        i++;
    }
    return (1);
}

int     test_block(char **tab, int i, int j, char nb)
{
    int x;
    int y;

    x = -1;
    if (i <= 3)
        i = 1;
    else if (i <= 6)
        i = 4;
    else if (i <= 9)
        i = 7;
    j = j - (j % 3);
    while (++x < 3)
    {
        y = -1;
        while (++y < 3)
        {
            if (tab[i][j] == nb)
                return (0);
            j++;
        }
        j = j - 3;
        i++;
    }
    return (1);
}

int     test_symbol(int n, char **tab)
{
    int i;
    int j;

    i = 0;
    if (n == 10)
    {
        while (++i <= 9)
        {
            j = 0;
            while (tab[i][j])
            {
                if ((tab[i][j] <= 48 || tab[i][j] > 57) && tab[i][j] != 46)
                    return (0);
                j++;
            }
            if (j != 9)
                return (0);
        }
        return (1);
    }
    else
        return (0);
}
/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   sudoky.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: squiana <[email protected]>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/07/14 20:46:01 by squiana           #+#    #+#             */
/*   Updated: 2019/07/14 22:55:34 by squiana          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <unistd.h>

int     test_line(char **tab, char nb, int i);
int     test_column(char **tab, char nb, int j);
int     test_block(char **tab, int i, int j, char nb);

void    ft_putchar(char c)
{
    write(1, &c, 1);
}

void    display(char **tab)
{
    int i;
    int j;

    i = 1;
    while (i <= 9)
    {
        j = 0;
        while (tab[i][j] != '\0')
        {
            ft_putchar(tab[i][j]);
            if (j != 8)
                ft_putchar(' ');
            j++;
        }
        ft_putchar('\n');
        i++;
    }
}

int     sudoky(int place, char **tab)
{
    int     i;
    int     j;
    char    nb;

    nb = '0';
    i = place / 9;
    j = place % 9;
    if (place == 90)
        return (1);
    if (tab[i][j] != '.')
        return (sudoky(place + 1, tab));
    while (++nb <= '9')
    {
        if (test_line(tab, nb, i) + test_column(tab, nb, j) +
        test_block(tab, i, j, nb) == 3)
        {
            tab[i][j] = nb;
            if (sudoky(place + 1, tab))
                return (1);
        }
    }
    tab[i][j] = '.';
    return (0);
}

int     only_one(char **tab)
{
    int l;
    int i;
    int j;

    l = 0;
    i = 1;
    while (i <= 9)
    {
        j = 0;
        while (tab[i][j] != '\0')
        {
            if ((tab[i][j] >= 49 && tab[i][j] <= 57))
            {
                l++;
                j++;
            }
            else
                j++;
        }
        i++;
    }
    if ((l < 17) || (l == 81))
        return (0);
    else
        return (1);
}