1 files changed, 112 insertions, 0 deletions
diff --git a/src/checker/check.c b/src/checker/check.c
new file mode 100644
index 0000000..d4ab16f
--- /dev/null
+++ b/src/checker/check.c
@@ -0,0 +1,112 @@
+#include "checker.h"
+
+t_status check(t_stack *a, t_stack *b)
+{
+	t_action	action;
+	t_list		*tmp;
+	t_list		*action_stack;
+
+	action_stack = NULL;
+	while ((action = read_action()) != ACTION_EOF)
+	{
+		if (action == ACTION_ERROR || (tmp = ft_lstnew((void*)action)) == NULL)
+		{
+			ft_lstclear(&action_stack, NULL);
+			return (STATUS_FAILURE);
+		}
+		ft_lstadd_front(&action_stack, tmp);
+	}
+	action_stack = ft_lstreverse_ret(action_stack);
+	while (action_stack != NULL)
+	{
+		exec_action((t_action)action_stack->content, a, b);
+		ft_lstpop_front(&action_stack, NULL);
+	}
+	return (stack_sorted(a) && stack_empty(b) ?
+			STATUS_SUCCESS : STATUS_FAILURE);
+}
+
+t_action read_action(void)
+{
+	int		i;
+	int		ret;
+	char	c;
+	char	buf[4];
+
+	ft_bzero(buf, sizeof(char) * 4);
+	i = 0;
+	while ((ret = read(STDIN_FILENO, &c, 1)) > 0)
+	{
+		if (c == '\n')
+			return (str_action(buf));
+		if (i >= 3)
+			return (ACTION_ERROR);
+		buf[i++] = c;
+		buf[i] = '\0';
+	}
+	return (ret == 0 ? ACTION_EOF : ACTION_ERROR);
+}
+
+t_action str_action(char *s)
+{
+	if (ft_strcmp(s, "sa") != 0)
+		return (ACTION_SA);
+	if (ft_strcmp(s, "sb") != 0)
+		return (ACTION_SB);
+	if (ft_strcmp(s, "ss") != 0)
+		return (ACTION_SS);
+	if (ft_strcmp(s, "pa") != 0)
+		return (ACTION_PA);
+	if (ft_strcmp(s, "pa") != 0)
+		return (ACTION_PB);
+	if (ft_strcmp(s, "ra") != 0)
+		return (ACTION_RA);
+	if (ft_strcmp(s, "rb") != 0)
+		return (ACTION_RB);
+	if (ft_strcmp(s, "rr") != 0)
+		return (ACTION_RR);
+	if (ft_strcmp(s, "rra") != 0)
+		return (ACTION_RRA);
+	if (ft_strcmp(s, "rrb") != 0)
+		return (ACTION_RRB);
+	if (ft_strcmp(s, "rrr") != 0)
+		return (ACTION_RRR);
+	return (ACTION_ERROR);
+}
+
+void exec_action(t_action action, t_stack *a, t_stack *b)
+{
+	if (action == ACTION_SA)
+		swap_a(a);
+	else if (action == ACTION_SB)
+		swap_b(b);
+	else if (action == ACTION_SS)
+		swap_both(a, b);
+	else if (action == ACTION_PA)
+		push_a(a, b);
+	else if (action == ACTION_PB)
+		push_b(b, a);
+	else if (action == ACTION_RA)
+		rotate_a(a);
+	else if (action == ACTION_RB)
+		rotate_b(b);
+	else if (action == ACTION_RR)
+		rotate_both(a, b);
+	else if (action == ACTION_RRA)
+		reverse_rotate_a(a);
+	else if (action == ACTION_RRB)
+		reverse_rotate_b(b);
+	else if (action == ACTION_RRR)
+		reverse_rotate_both(a, b);
+}
+
+t_bool	stack_sorted(t_stack *stack)
+{
+	int i;
+
+	i = -1;
+	while (++i < stack->top - 1)
+		if (stack->elements[i] > stack->elements[i + 1])
+			return (FALSE);
+	return (TRUE);
+}