/*
 *  DOS.H
 */

#ifdef NOTDEF
#include "exec/types.h"
#include "exec/memory.h"
#include "libraries/dos.h"
#include "libraries/dosextens.h"
#include "libraries/filehandler.h"
#endif NOTDEF

/*
 *  ACTIONS which do not exist in dosextens.h but which indeed exist on
 *  the Amiga.
 */

#define ACTION_OPENRW       1004
#define ACTION_OPENOLD      1005
#define ACTION_OPENNEW      1006
#define ACTION_CLOSE        1007
#define ACTION_SEEK         1008
#define ACTION_RAWMODE      994
#define ACTION_MORECACHE    18
#define ACTION_FLUSH        27

#define CTOB(x) (void *)(((long)(x))>>2)    /*  BCPL conversion */
#define BTOC(x) (void *)(((long)(x))<<2)

#define bmov(ss,dd,nn) CopyMem(ss,dd,nn)    /*  my habit        */

#define DOS_FALSE   0
#define DOS_TRUE    -1

#define RAMFILE     struct _RAMFILE         /*  less restrictive typedefs   */
#define FENTRY      struct _FENTRY
#define LOCKLINK    struct _LL
#define MYFH        struct _MYFH

typedef unsigned char   ubyte;              /*  unsigned quantities         */
typedef unsigned short  uword;
typedef unsigned long   ulong;

typedef struct Interrupt        INTERRUPT;
typedef struct Task             TASK;
typedef struct FileLock         LOCK;       /*  See LOCKLINK    */
typedef struct FileInfoBlock    FIB;
typedef struct DosPacket        PACKET;
typedef struct Process          PROC;
typedef struct DeviceNode       DEVNODE;
typedef struct DeviceList       DEVLIST;
typedef struct DosInfo          DOSINFO;
typedef struct RootNode         ROOTNODE;
typedef struct FileHandle       FH;
typedef struct MsgPort          PORT;
typedef struct Message          MSG;
typedef struct MinList          LIST;
typedef struct MinNode          NODE;
typedef struct DateStamp        STAMP;
typedef struct InfoData         INFODATA;
typedef struct DosLibrary       DOSLIB;

#define FILE_DIR    1
#define FILE_FILE   -1


RAMFILE {
    NODE    node;
    RAMFILE *parent;
    char    *name;
    char    *comment;
    short   flags;
    short   type;       /*  -1 = file,  1 = dir, 0 = dummy entry    */
    short   locks;      /*  <0:exclusive 0:none >0:shared           */
    ulong   protection;
    ulong   bytes;
    LIST    list;       /*  list of FENTRY's or RAMFILE's   */
    STAMP   date;
};

FENTRY {
    NODE    node;
    ubyte   *buf;
    ulong   bytes;
};

/*
 *  We use this structure to link locks together in a list for internal
 *  usage.  I could have use the link field in the lock structure as a
 *  real linked list, but didn't want to have to sequentially search the
 *  list to remove a node.
 *
 *  NOTE:   You CANNOT simply extend the FileLock (LOCK) structure.  Some
 *  programs assume it is sizeof(LOCK) big and break.  I found this out the
 *  hard way.
 */

LOCKLINK {
    NODE    node;
    LOCK    *lock;
};

MYFH {
    NODE    node;
    RAMFILE *file;      /*  file header     */
    FENTRY  *fentry;
    long    base;       /*  base of FENTRY      */
    long    offset;     /*  offset into FENTRY  */
};

/*
 *  (void *)  in Aztec C means 'pointer to anything'.  I use it
 *  extensively.
 */

extern void *AbsExecBase;

extern void *AllocMem(), *RemHead(), *CreatePort(), *GetMsg();
extern void *FindTask(), *Open(), *OpenLibrary();

extern void   *dosalloc(), *NextNode(), *GetHead();
extern void   freedata(), freeramfile(), ramunlock(), btos(), returnpacket();
extern LOCK *ramlock();
extern RAMFILE *searchpath(), *createramfile(), *getlockfile();

extern char *getpathelement();
extern char *typetostr();

#define PType (packet->dp_Type)
#define PArg1 (packet->dp_Arg1)
#define PArg2 (packet->dp_Arg2)
#define PArg3 (packet->dp_Arg3)
#define PArg4 (packet->dp_Arg4)
#define PRes1 (packet->dp_Res1)
#define PRes2 (packet->dp_Res2)