112 lines
5.6 KiB
NASM
112 lines
5.6 KiB
NASM
;*************************************************************************************
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; MODULE: CFILE.ASM DATE: APRIL 27,1997
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; AUTHOR: SEAN M. KESSLER
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; TARGET: 32 BIT LAT MODEL
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; FUNCTION : BUFFERED FILE FUNCTIONS
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;*************************************************************************************
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.386
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.MODEL FLAT
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INCLUDE devioctl.inc
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INCLUDE string.inc
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INCLUDE openfile.inc
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.DATA
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crlf DB 0Dh,0Ah,00h
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.CODE
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_FileOpen proc near ; int FileOpen(char *pathFileName,FileInfo *pFileInfo,int access,int share,int open,int attributes)
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push ebp ; save stack frame
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mov ebp,esp ; create new frame
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push esi ; save source index
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CREATEFILE [ebp+08h],[ebp+10h],[ebp+14h],[ebp+18h],[ebp+1Ch] ; call create file
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mov esi,[ebp+0Ch] ; move FileInfo ptr to esi
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mov [FileInfo ptr [esi]].FileInfo@@mhFileHandle,eax ; store handle
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pop esi ; restore source index
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pop ebp ; restore previous frame
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retn ; return near to caller
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_FileOpen endp
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_FileClose proc near ; int CloseFile(FileInfo *pFileInfo);
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push ebp ; save prior frame
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mov ebp,esp ; create new stack frame
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push esi ; save source index register
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mov esi,[ebp+08h]
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cmp [FileInfo ptr [esi]].FileInfo@@mhFileHandle,INVALID_HANDLE ; check for valid handle
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je @@FileCloseEnd ; handle is not valid
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CLOSEHANDLE [FileInfo ptr[esi]].FileInfo@@mhFileHandle ; close handle
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mov [FileInfo ptr[esi]].FileInfo@@mhFileHandle,INVALID_HANDLE ; set handle to invalid state
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@@FileCloseEnd: ; end sync address
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pop esi ; restore source index
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pop ebp ; restore prior stack frame
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retn ; return near to caller
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_FileClose endp
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_FileRead proc near ; FileRead(FileInfo *pFileInfo,BYTE *ptrByte);
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push ebp ; save stack frame
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mov ebp,esp ; create new stack frame
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push esi ; save source index register
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push edi ; save destination index register
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mov esi,[ebp+08h] ; move pFileInfo to esi register
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mov edi,[ebp+0Ch] ; move ptrByte to destination index register
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FREAD esi,edi ; perform read from disk, or cache
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pop edi ; restore destination index register
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pop esi ; restore source index register
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pop ebp ; restore stack frame
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retn ; return near to caller
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_FileRead endp
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_FileWrite proc near
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push ebp ; save previous stack frame
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mov ebp,esp ; create new stack frame
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pop ebp ; restore previous stack frame
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retn ; return near to caller
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_FileWrite endp
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_FileReadLine proc near ; int FileReadLine(FileInfo *pFileInfo,char *strLine)
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push ebp ; save stack frame
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mov ebp,esp ; create new frame
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push esi ; save source index register
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push edi ; save destination index register
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mov esi,[ebp+08h] ; move (pFileInfo *) to source index register
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mov edi,[ebp+0Ch] ; move strLine to destination index register
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FREADLINE esi,edi ; perform getLine
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pop edi ; restore destination index register
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pop esi ; restore source index register
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pop ebp ; restore previous stack frame
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retn ; return near to caller
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_FileReadLine endp
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_FileWriteLine proc near ; int FileWrite(FileInfo *pFileInfo,char *strLine,int length);
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push ebp ; save previous stack frame
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mov ebp,esp ; create new frame
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push esi ; save source index register
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push edi ; save destination index register
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mov esi,[ebp+08h] ; move pFileInfo to source index register
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mov edi,[ebp+0Ch] ; move strLine to destination index register
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FWRITELINE esi,edi ; write string to file
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lea edi,crlf ; get crlf address to edi register
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FWRITELINE esi,edi ; write string to file
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pop edi ; restore destination index register
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pop esi ; restore source index register
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pop ebp ; restore previous stack frame
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retn ; return near to caller
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_FileWriteLine endp
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_FileFlush proc near
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push ebp ; save previous stack frame
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mov ebp,esp ; create new frame
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push esi ; save source index register
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mov esi,[ebp+08h] ; move pFileInfo to source index register
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FFLUSH esi ; flush cache
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pop esi ; restore source index register
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pop ebp ; restore previous stack frame
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retn ; return near to caller
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_FileFlush endp
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public _FileOpen
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public _FileClose
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public _FileRead
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public _FileWrite
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public _FileReadLine
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public _FileWriteLine
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public _FileFlush
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END
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