graphs/piscine/null_terminated_arrays/null_terminated_arrays.c


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#include "null_terminated_arrays.h"

#include <assert.h>
#include <stddef.h>
#include <stdio.h>

void reverse_array(const char **arr)
{
    const char **p;
    for (p = arr; *p; p++)
    {
        continue;
    }
    p--;

    while (p > arr)
    {
        const char *tmp = *p;
        *p = *arr;
        *arr = tmp;
        arr++;
        p--;
    }
}

void reverse_matrix(const char ***matrix)
{
    const char ***p;
    for (p = matrix; *p; p++)
    {
        continue;
    }
    p--;

    while (p > matrix)
    {
        reverse_array(*p);
        reverse_array(*matrix);
        const char **tmp = *p;
        *p = *matrix;
        *matrix = tmp;
        matrix++;
        p--;
    }

    if (p == matrix)
    {
        reverse_array(*matrix);
    }
}