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Assembly Source File  |  1997-01-16  |  1KB  |  67 lines
  1.  
  2. ; *******************************************************
  3. ; *                            *
  4. ; *     Delphi Runtime Library                          *
  5. ; *                            *
  6. ; *    Copyright (c) 1996 Borland International    *
  7. ; *                            *
  8. ; *******************************************************
  9.  
  10.     INCLUDE    SE.ASM
  11.     INCLUDE    FILEIO.ASM
  12.  
  13.     .386
  14.     .MODEL    FLAT
  15.  
  16.     EXTRN    SetFilePointer:NEAR, GetLastError:NEAR
  17.         EXTRN   SetInOutRes:NEAR, InOutError:NEAR
  18.  
  19.     PUBLIC    _FilePos
  20.  
  21.     .CODE
  22.  
  23. ;    PROCEDURE _FilePos( f: File );
  24.  
  25. _FilePos PROC
  26.  
  27. ; ->    EAX    Pointer to file variable
  28.  
  29.     PUSH    EBX
  30.     MOV    EBX,EAX
  31.  
  32.     MOV    EDX,[EBX].Mode        ; check whether file is open
  33.     SUB    EDX,fmInput
  34.     CMP    EDX,fmInOut-fmInput
  35.     JA    @@fileNotOpen
  36.  
  37.     PUSH    FILE_CURRENT
  38.     PUSH    0
  39.     PUSH    0
  40.     PUSH    [EBX].Handle
  41.     CALL    SetFilePointer        ; get current position
  42.     CMP    EAX,-1
  43.     JZ    @@error
  44.  
  45.     XOR    EDX,EDX
  46.         DIV    [EBX].RecSize        ; position is in records
  47.  
  48. @@exit:
  49.     POP    EBX
  50.     RET
  51.  
  52. @@error:
  53.     CALL    InOutError
  54.     OR    EAX,-1
  55.     JMP    @@exit
  56.  
  57. @@fileNotOpen:
  58.     MOV    EAX,103
  59.         CALL    SetInOutRes
  60.     OR    EAX,-1
  61.     JMP    @@exit
  62.  
  63. _FilePos ENDP
  64.  
  65.     END
  66. 
  67.