#ifndef	EXEC_LIBRARIES_H
#define	EXEC_LIBRARIES_H
/*
**
**	Definitions for use when creating or using Exec libraries	
**
**	(C) Copyright 1985,1986,1987,1988,1989 Commodore-Amiga, Inc.
**	    All Rights Reserved
*/

#ifndef EXEC_NODES_H
#include "exec/nodes.h"
#endif !EXEC_NODES_H


/*------ Special Constants ---------------------------------------*/
#define LIB_VECTSIZE    6	/* Each library entry takes 6 bytes */
#define LIB_RESERVED    4	/* Exec reserves the first 4 vectors */
#define LIB_BASE        (-LIB_VECTSIZE)
#define LIB_USERDEF     (LIB_BASE-(LIB_RESERVED*LIB_VECTSIZE))
#define LIB_NONSTD      (LIB_USERDEF)

/*------ Standard Functions --------------------------------------*/
#define LIB_OPEN        (-6)
#define LIB_CLOSE       (-12)
#define LIB_EXPUNGE     (-18)
#define LIB_EXTFUNC     (-24)	/* for future expansion */

/*------ Library Base Structure ----------------------------------*/
/* Also used for Devices and some Resources */
struct Library {
    struct  Node lib_Node;
    UBYTE   lib_Flags;
    UBYTE   lib_pad;
    UWORD   lib_NegSize;            /* number of bytes before library */
    UWORD   lib_PosSize;            /* number of bytes after library */
    UWORD   lib_Version;	    /* major */
    UWORD   lib_Revision;	    /* minor */
    APTR    lib_IdString;	    /* ASCII identification */
    ULONG   lib_Sum;                /* the checksum itself */
    UWORD   lib_OpenCnt;            /* number of current opens */
};	/* Warning: size is not a longword multiple! */

/* lib_Flags bit definitions (all others are system reserved) */
#define LIBF_SUMMING    (1<<0)      /* we are currently checksumming */
#define LIBF_CHANGED    (1<<1)      /* we have just changed the lib */
#define LIBF_SUMUSED    (1<<2)      /* set if we should bother to sum */
#define LIBF_DELEXP     (1<<3)      /* delayed expunge */


/* Temporary Compatibility */
#define lh_Node         lib_Node
#define lh_Flags        lib_Flags
#define lh_pad          lib_pad
#define lh_NegSize      lib_NegSize
#define lh_PosSize      lib_PosSize
#define lh_Version      lib_Version
#define lh_Revision     lib_Revision
#define lh_IdString     lib_IdString
#define lh_Sum          lib_Sum
#define lh_OpenCnt      lib_OpenCnt

#endif	/* EXEC_LIBRARIES_H */