/*----------------------------------------------------------------------
  File    : stack.h
  Contents: general stack management
  Author  : Christian Borgelt
  History : 20.05.1998 file created
----------------------------------------------------------------------*/
#ifndef __STACK__
#define __STACK__

/*----------------------------------------------------------------------
  Type Definitions
----------------------------------------------------------------------*/
typedef struct stack STACK;     /* a stack */

/*----------------------------------------------------------------------
  Functions
----------------------------------------------------------------------*/
extern STACK* stk_create (void);
extern void   stk_delete (STACK *stk);
extern int    stk_empty  (STACK *stk);
extern int    stk_push   (STACK *stk, void *obj);
extern void*  stk_pop    (STACK *stk, int keep);

#endif