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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* sorting.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/04/13 15:04:19 by dkaiser #+# #+# */
/* Updated: 2024/04/26 18:35:27 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "push_swap.h"
static int is_sorted(t_stack *stack)
{
int i;
if (stack->size < 2)
return (1);
i = 1;
while (i < stack->size)
{
if (stack->stack[i] < stack->stack[i - 1])
return (0);
i++;
}
return (1);
}
static void sort_three(t_psdata *data)
{
if (data->a->stack[1] > data->a->stack[0]
&& data->a->stack[1] > data->a->stack[2])
run_command(data, RRA);
else if (data->a->stack[0] > data->a->stack[1]
&& data->a->stack[0] > data->a->stack[2])
run_command(data, RA);
if (data->a->stack[0] > data->a->stack[1])
run_command(data, SA);
}
static void ps_radixsort(t_psdata *data, int bit)
{
int i;
int size;
i = 0;
size = data->a->size;
while (i < size)
{
if (data->a->size && ((data->a->stack[0] >> bit) & 1) == 0)
run_command(data, PB);
else if (data->a->size > 1)
run_command(data, RA);
i++;
}
while (data->b->size > 0)
run_command(data, PA);
if (!is_sorted(data->a))
ps_radixsort(data, bit + 1);
}
void stack_sort(t_psdata *data)
{
if (is_sorted(data->a))
return ;
else if (data->a->size == 2)
run_command(data, SA);
else if (data->a->size == 3)
sort_three(data);
else
ps_radixsort(data, 0);
}
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