v4.0/src/INC/DIRENT.INC

   1 ;       SCCSID = @(#)dirent.asm 1.1 85/04/10
   2 ;       SCCSID = @(#)dirent.asm 1.1 85/04/10
   3 Break <Directory entry>
   4
   5 ;
   6 ;       +---------------------------+
   7 ;       |  (12 BYTE) filename/ext   |       0       0
   8 ;       +---------------------------+
   9 ;       |     (BYTE) attributes     |       11      B
  10 ;       +---------------------------+
  11 ;       |    (10 BYTE) reserved     |       12      C
  12 ;       +---------------------------+
  13 ;       | (WORD) time of last write |       22      16
  14 ;       +---------------------------+
  15 ;       | (WORD) date of last write |       24      18
  16 ;       +---------------------------+
  17 ;       |   (WORD) First cluster    |       26      1A
  18 ;       +---------------------------+
  19 ;       |     (DWORD) file size     |       28      1C
  20 ;       +---------------------------+
  21 ;
  22 ;   First byte of filename  = E5 -> free directory entry
  23 ;                           = 00 -> end of allocated directory
  24 ;   Time:   Bits 0-4=seconds/2, bits 5-10=minute, 11-15=hour
  25 ;   Date:   Bits 0-4=day, bits 5-8=month, bits 9-15=year-1980
  26 ;
  27
  28 dir_entry   STRUC
  29 dir_name    DB      11 DUP (?)          ; file name
  30 dir_attr    DB      ?                   ; attribute bits
  31 dir_codepg  dw      ?                   ; code page DOS 4.00
  32 dir_extcluster dw   ?                   ; extended attribute starting cluster
  33 dir_attr2   db      ?                   ; reserved
  34 dir_pad     DB      5  DUP (?)          ; reserved for expansion
  35 dir_time    DW      ?                   ; time of last write
  36 dir_date    DW      ?                   ; date of last write
  37 dir_first   DW      ?                   ; first allocation unit of file
  38 dir_size_l  DW      ?                   ; low 16 bits of file size
  39 dir_size_h  DW      ?                   ; high 16 bits of file size
  40 dir_entry   ENDS
  41
  42 attr_read_only      EQU      1h
  43 attr_hidden         EQU      2h
  44 attr_system         EQU      4h
  45 attr_volume_id      EQU      8h
  46 attr_directory      EQU     10h
  47 attr_archive        EQU     20h
  48 attr_device         EQU     40h         ; This is a VERY special bit.
  49                                         ;   NO directory entry on a disk EVER
  50                                         ;   has this bit set. It is set non-zero
  51                                         ;   when a device is found by GETPATH
  52
  53 attr_all            EQU     attr_hidden+attr_system+attr_directory
  54                                         ; OR of hard attributes for FINDENTRY
  55
  56 attr_ignore         EQU     attr_read_only+attr_archive+attr_device
  57                                         ; ignore this(ese) attribute(s) during
  58                                         ; search first/next
  59
  60 attr_changeable     EQU     attr_read_only+attr_hidden+attr_system+attr_archive
  61                                         ; changeable via CHMOD