debut ecritures fonctions clean et error

srcs/pushswap.c

@@ -0,0 +1,32 @@
+
+#include "pushswap.h"
+
+void	is_valid(int ac, char **av)
+{
+	if (ac < 2)
+		ps_error(1);
+	(void)av;
+}
+
+t_stack	*init_stack(int ac, char **av)
+{
+	(void)ac;
+	(void)av;
+	t_stack		*start;
+
+	if (!(start = ft_calloc(1, sizeof(t_stack))))
+		ps_clean(start, 2);
+	return (start);
+}
+
+int		main(int ac, char **av)
+{
+	t_stack		*stack;
+	//t_list		*result;
+
+	is_valid(ac, av); // check if usage and list are correct
+	stack = init_stack(ac, av);
+	// result = sort_algo(stack);
+	return(0);
+}
+