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;
; EXPORT DATE: 9/11
;Equates for FASTOPEN.
;FASTOPEN NAME CACHING Subfunctions
FONC_Look_up equ 1
FONC_insert equ 2
FONC_delete equ 3
FONC_update equ 4
FONC_purge equ 5 ;reserved for the future use.
;FASTOPEN EXTENT CACHING Subfunctions
FSK_Open equ 11 ;AN000;
FSK_Close equ 12 ;AN000;
FSK_Delete equ 13 ;AN000;
FSK_Lookup equ 14 ;AN000;
FSK_Insert equ 15 ;AN000;
FSK_Trunc equ 16 ;AN000;
HeaderSize equ 8 ; size of file header (8 bytes) ;AN000;
ExtendSize equ 8 ; size of extend (8 bytes) ;AN000;
Num_Of_Pages equ 1 ; number of pages ;AN000;
Num_Of_Segs equ 2 ; number of frame segments ;AN000;
Stayresident equ 04ch ; terminate and stay resident function code
;Equates used in DOS.
FastOpen_Set equ 00000001B
FastOpen_Reset equ 11111110B
Lookup_Success equ 00000010B
Lookup_Reset equ 11111101B
Special_Fill_Set equ 00000100B
Special_Fill_Reset equ 11111011B
No_Lookup equ 00001000B
Set_For_Search equ 00010000B ;DCR 167
;============= FastOpen Data Structures =====================
Fastopen_Entry STRUC ;Fastopen Entry pointer in DOS
Fastopen_Entry_size dw 4 ;size of the following
Fastopen_Name_Caching dd ?
;Fastopen_FatChain_Caching dd ? ;reserved for future use
Fastopen_Entry ENDS
;
CMPCT_DIR_INFO STRUC ;compact version of Dir Info.
CDI_file_name db 11 dup (' ')
CDI_file_attr db ?
CDI_codepage dw ?
CDI_extcluster dw ?
CDI_attr2 db ?
CDI_time dw ?
CDI_date dw ?
CDI_cluster dw ?
CDI_filesize dd ?
CMPCT_DIR_INFO ENDS
;
ORIG_DIR_INFO STRUC
ODI_head db 17 dup (?)
ODI_skip db 5 dup (0) ;reserved for DOS. FASTOPEN does not
ODI_tail db 10 dup (?) ; use ODI_skip part.
ORIG_DIR_INFO ENDS
;
ODI_head_leng equ 17
ODI_skip_leng equ 5
ODI_tail_leng equ 10
;
FASTOPEN_EXTENDED_INFO STRUC
FEI_dirpos db 0
FEI_dirsec dd 0
FEI_clusnum dw 0
FEI_lastent dw 0 ; for search first
FEI_dirstart dw 0 ; for search first
FASTOPEN_EXTENDED_INFO ENDS
;
NAME_RECORD STRUC
nLRU_ptr dw -1
nMRU_ptr dw -1 ;reverse of nLRU_ptr
nChild_ptr dw -1
nSibling_ptr dw -1
nBackward_ptr dw -1 ;points to preceding node
nCmpct_Dir_Info db size Cmpct_Dir_Info dup (' ')
nExtended_Info db size Fastopen_Extended_Info dup (?)
NAME_RECORD ENDS
;
DRIVE_CACHE_HEADER STRUC ;drive cache header
DCH_LRU_ROOT dw 0 ;Header of the LRU chain of this drive
DCH_MRU_ROOT dw 0 ;offset to the last entry of LRU chain
DCH_Child_ptr dw -1 ;the first child in Name cache seg.
DCH_Sibling_ptr dw -1 ;points to the next drive cache header
DCH_Drive_letter db 'C' ;drive letter
DCH_Num_Entries dw 0 ;Number of entries in the Name cache.
DCH_Name_Buff dw 0 ;pointer to name cahe buffer
DRIVE_CACHE_HEADER ENDS
;
;======== FAST SEEK FUNCTION DATA STRUCTURES =======================
DRIVE_HEADER STRUC ; Drive header structure ;AN000;
Drive_Number dw 0 ; drive number ;AN000;
Extent_Count dw 0 ; reserved for debugging
MRU_Hdr_Ptr dw 0 ; pointer to OPEN Queue
Free_ptr dw 0 ; pointer to FREE buffer ;AN000;
Close_Ptr dw 0 ; pointer to CLOSE Queue ;AN000;
Buff_Size dw 0 ; cache buffer size including header ;AN000;
Free_Size dw 0 ; size of Free area in bytes
Next_Drv_Hdr_Ptr dw 0 ; pointer to next drive header
DRIVE_HEADER ENDS
FILE_HEADER STRUC ; File header structure ;AN000;
FH_Phys_Clus_Num dw 0 ; starting physcial clustnum of file ;AN000;
FH_Refer_Count dw 0 ; reference count ;AN000;
FH_Next_Extn_Ptr dw 0 ; pointer to first extent of the file;AN000;
FH_Next_Hdr_Ptr dw 0 ; pointer to next file header ;AN000;
FH_MRU_Extn_Ptr dw 0 ; pointer to MRU extent
dw 0
dw 0
dw 0
FILE_HEADER ENDS ;AN000;
EXTENT_HEADER STRUC ; extend header structure ;AN000;
EH_Logic_Clus_Num dw 0 ; starting logical clus num of extent;AN000;
EH_Phys_Clus_Num dw 0 ; starting physical clus numof extnt;AN000;
EH_Count dw 0 ; range of logical clusnum in the extnt
EH_Next_Extn_Ptr dw 0 ; pointer to next extent ;AN000;
EH_Prev_Extn_Ptr dw 0 ; pointer to previous extent ;AN000;
EH_Next_LRU_Ptr dw 0 ; pointer to next LRU extent
EH_Prev_LRU_Ptr dw 0 ; pointer tp previous LRU extent
dw 0
EXTENT_HEADER ENDS
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