2005
The new year has come, and I received a lot of blessings on December 31, 2004, and I am very grateful to my friends. My training also reported a paragraph. After returning the unit, you should face formal work. The big mouth sent the information yesterday that the brothers of the school have lived very well. Their BOSS also asked them to fall. Oh, I really want to go back to school ~~~ I don't mean in two days, I still have to see book learning. Then then digest the memory map file.
Steps to use the memory map files two steps:
1 Create a memory mapping file object using CreatFilemapping.
Invoke Creatfilemapping, Hfile, LpfilemappingAttributes, Flprotect, Dwmaximumsizehigh, / /
Dwmaximumsizelow, LPNAME
.if EAX
Mov Hfilemap, EAX
.endif
This function determines the purpose of the mapping file: Is the disk file established a memory map or builds a transllection between the memory on the memory page. The above functions can be implemented by setting the value of the first parameter HFile. If the HFile handle is a file that belongs to a already opened, the mapping file is established on this file. If you want to build a memory map file to be shared in the memory file, you specify the HFile as -1.
LPFILEMAPPINGATTRIBUTES: Whether memory map files can be inherited. NULL is not inherited.
FLPROTECT: Memory mapping file protection method, Note To open the file with the CreatFile function to get the HFile handle, you must specify the corresponding flag.
Flprotect, dwmaximumsizehigh / dwmaximumsize :: Specify the length of the 64-bit memory map file. Setting these two parameters to zero, the system automatically adjusts the size of the memory map file to the size of the disk file.
LPNAME: The name of the memory map file. The mapping file must be named when the process is shared.
Use OpenFilemapping to open the bundled memory mapped files that have been created for the process.
Invoke OpenFilemapping, DwdesiredAccess, BinheritHandle, LPNAME
.if EAX
Mov Hfilemap, EAX
.endif
DwdesiredAccess: Specify the protection type.
LPNAME: The name used when creating an object.
BinheritHandle: Inherited handle.
2 Create a view of the memory mapping file. It is equivalent to assigning a line-shaped address space to the memory mapping file and associates the linear address with the contents of the file. This application can access files by accessing threaded addresses.
Invoke MapViewoffile, Hfilemap, DwdesiredAccess, DWFileOffSeth, DwfileOffsetlow, /
Dwnumberofbytestomap
.if EAX
MOV IPMemory, EAX
.endif
Not much to say this function is very simple.
Cancel mapping file: invoke unmapViewoffile, LPMEMory
Close Map: Invoke CloseHandle, HfileMap
Eat :) Ponsed again! ~
Haha, I am coming ~~~ I will sleep in the afternoon, I feel comfortable :) The weather is good! But not at night, otherwise I will learn the monkey to say the last sentence: the moonlight is good, Qingquan stone is flowing ~~~~~~~~~ hiahia
Address: Write the modification of the file to the disk is called this function.
Invoke Flushviewoffile, LPMEMORY, DWFILESIZE
I don't know if your idea is chaos :) Summary now to use the memory map file to read and write the file:
1. Call CreatFile Open the file you want to map and get HFile
2. Call the CreatFileMapping function Generate a memory mapping object based on file objects created in the Creatfile function, get HFILEMAP
3. Call the MapViewOffile function to map a zone or entire area of the entire file to the memory, get the first byte of the first byte of the first byte of the memory. LPMEMory
4. Use this pointer to read and write files
5. Call unmapViewoffile to release file mapping, incoming parameters are LPMEMORY
6. Call CloseHandle to turn off the memory map file, incoming parameters are HFILEMAP
7. Call the CloseHandle to close the file, the incoming function is HFile
Let's take a look at Luo Yunbin's "Windows32 Assess Program Design":
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
; Sample Code for
By Luo Yunbin,
http://asm.yeah.net
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
WordCount.asm
; File Read Write Example - Open text file for word statistics, then create result files
Read and write file operations use the memory map file function.
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
; Compile and link using NMAKE or the following command:
; ML / C / Coff WordCount.asm
RC WordCount.rc
; LINK / SUBSYSTEM: Windows WordCount.obj WordCount.res
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> Folder. 386
.Model flat, stdcall
Option CaseMAP: NONE
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
Include file definition
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
INCLUDE Windows.inc
INCLUDE User32.inc
INCLUDELIB USER32.LIB
INCLUDE KERNEL32.INC
IncludeLib kernel32.lib
INCLUDE COMDLG32.INC
INCLUDELIB COMDLG32.LIB
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
; Equorical definition
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
ICO_MAIN EQU 1000
DLG_MAIN EQU 100
IDC_File EQU 101
IDC_BROWSE EQU 102word_count struct
LPletter DD 26 DUP (?)
DWCOUNT DD?
DwDepth DD?
Word_count ends
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
Data segment
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
.DATA?
Hinstance DD?
HwinMain DD?
SZFILENAME DB MAX_PATH DUP (?)
SZBuffer DB 4096 DUP (?)
STWORDCOUNT WORD_COUNT <>
DWCOUNT DD?
DWOPTION DD?
F_counting EQU 00000001H
F_filend EQU 00000002H
.const
SZFILEXT DB 'All File', 0, '*. *', 0, 0
SzloGext db '.log', 0
Szerropenfile db 'can't open the file!', 0
SzerrcreateFile DB 'Unable to establish a record file!', 0
SZFMTWORD DB '% 5d (% 3D ‰)% s', 0DH, 0AH, 0
Szsuccees DB 'is successful, please check the record file% s', 0
Szsucceescap DB 'statistics success', 0
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
Code segment
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Folder
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
Traverse the tree and output the result
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
_WalkTree Proc_hfile, _lpwc, _lpsz
Local @dwtemp
Local @szword [52]: Byte
Pushhad
Mov ESI, _LPWC
Assume ESI
Tr word_count
.IF [ESI] .dwdepth && [ESI] .dwcount
*********************************************************** *******************
; Calculate percentage and write to log files
*********************************************************** *******************
MOV Eax, [ESI] .dwcount
MOV ECX, 1000
Mul ECX
Mov ECX, DWCOUNT
.IF ECX
Div ECX
.lse
MOV EAX, 0
.endif
Invoke WSPrintf, Addr Szbuffer, Addr Szfmtword, [ESI] .dwcount, Eax, _lpsz
Invoke lstrlen, Addr Szbuffer
MOV ECX, EAX
Invoke Writefile, _HFILE, AddR Szbuffer, ECX, Addr @ dwtemp, null
.endif
*********************************************************** *******************
If there is a lower node, please call
*********************************************************** *******************
Mov @ dwtemp, 0
.while @dwtemp <26
MOV EBX, @ dwtempmov EBX, DWORD PTR [ESI EBX * 4]
.IF EBX
Invoke lstrcpy, addr @ szword, _lpsz
Invoke lstrlen, addr @SZWORD
Lea ECX, @ Szword
Add ECX, EAX
MOV Eax, @ dwtemp
Add Al, 'A'
Mov Word PTR [ECX], AX
Invoke _walktree, _hfile, ebx, addr @szword
.endif
INC @dwtemp
.endw
*********************************************************** *******************
Release node
*********************************************************** *******************
.IF [ESI] .dwdepth
Invoke Globalfree, ESI
.endif
Popad
Assume ESI
Tr word_count
RET
_WalkTree Endp
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
; Establish a tree node or increase node count based on data
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
_Countletter Proc_dwletter
Local @dwindex
Assume EDI
Tr word_count
OR Al, 20H; Convert to lowercase letters
.IF (Al> = 'a') && (al <= 'z'); letters
*********************************************************** *******************
If it is a letter, press the EDI pointer to continue to search for the next node, find the update pointer,
Did not find a new node
*********************************************************** *******************
SUB Al, 'A'
Movzx Eax, Al
.IF DWORD PTR [EDI EAX * 4]
MOV EDI, DWORD PTR [EDI EAX * 4]
.lse
MOV EBX, [EDI] .dwdepth
EBX <50push EAX
Invoke GlobalLoc, GPTR, SIZEOF WORD_COUNT
POP ECX
.if EAX
MOV DWORD PTR [EDI ECX * 4], EAX
Mov Edi, EAX
Inc EBX
MOV [EDI] .dwdepth, EBX
.endif
.endif
.endif
.lse
*********************************************************** *******************
Not the letter indicating that a word has ended, increasing the word count
*********************************************************** *******************
INC [EDI] .dwcount
.IF [EDI] .dwdepth
Inc dwcount
.endif
Mov Edi, Offset StwordCount
.endif
Assume EDI: Nothing
RET
_Countletter Endp
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
_CoucentWord Proc
Local @ hfile, @ hfilemap, @ lpMemory, @ dwfilesis
Local @szlogfile [max_path]: Byte
Local @szbuffer
Invoke RTLZERMEMORY, AddR Stwordcount, Sizeof Stwordcount
*********************************************************** *******************
; open a file
*********************************************************** *******************
Invoke createfile, addr szfilename, generic_read, file_share_read, 0, /
Open_EXISTING, FILE_ATTRIBUTE_NORMAL, 0
.IF eax == invalid_handle_value
JMP_ERROR
.endif
Mov @ Hfile, EAX
Invoke getFilesize, @ hfile, null
Mov @ dwfilesize, eax
*********************************************************** *******************
Establish memory map files and process each byte
*********************************************************** *******************
Invoke createfilemapping, @ hfile, null, page_readonly, 0, 0, null
.if EAX
Mov @ HfileMap, EAX
Invoke MapViewoffile, EAX, File_Map_read, 0,0,0.if Eax
Mov @ lpmemory, EAX
JMP @f
.endif
Invoke Closehandle, @ hfilemap
.endif
JMP_ERROR
@@:
XOR EAX, EAX
Mov dwcount, EAX
Mov ESI, @ lpmemory
Mov Edi, Offset StwordCount
.while @dwfilesize
Lodsb
Dec @dwfilesize
Invoke _countletter, EAX
.endw
INVOKE _COUNTLETTER, 0
*********************************************************** *******************
Close the memory map file
*********************************************************** *******************
Invoke unmapviewoffile, @ lpmemory
Invoke Closehandle, @ hfilemap
Invoke closehandle, @ hfile
*********************************************************** *******************
Output record file
*********************************************************** *******************
Invoke lstrcpy, addr @ szlogfile, addr szfilename
Invoke lstrcat, addr @ szlogfile, addr szlogext
Invoke createfile, addr @ szlogfile, generic_write, file_share_read, /
0, create_always, file_attribute_normal, 0
.IF EAX! = INVALID_HANDLE_VALUE
Mov @ Hfile, EAX
Mov @ SZBuffer, 0
Mov Edi, Offset StwordCount
Invoke _walktree, @ hfile, edi, addr @szbuffer
Invoke closehandle, @ hfile
Invoke WSPrintf, Addr Szbuffer, Addr Szsuccees, Addr @Szlogfile
Invoke Messagebox, HwinMain, Addr Szbuffer, AddR Szsuckcescap, MB_OK or MB_ICONITIONMATION
.lse
Invoke Messagebox, Hwinmain, Addr Szerrcreatefile, NULL, MB_OK OR MB_ICONEXCLAMATION
.endif
RET
_ERROR:
Invoke Messagebox, HwinMain, Addr Szerropenfile, Null, MB_OK or MB_ICONEXCLAMATION
RET
_CountWord Endp
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> EDI ESI HWND, WMSG, WPARAM, LPARAM
Local @stopenfilename: OpenFileName
MOV EAX, WMSG
.IF EAX == WM_Close
.IF! (dwoption & f_counting)
Invoke EndDialog, Hwnd, Null
.endif
*********************************************************** *******************
.ELSEIF EAX == WM_INITDIALOG
Push hwnd
POP HwinMain
INVOKE LOADICON, HINSTANCE, ICO_MAIN
Invoke SendMessage, Hwnd, WM_SETICON, ICON_BIG, EAX
Invoke Senddlgitemmessage, HWnd, IDC_File, EM_SETLIMITTEXT, MAX_PATH, 0
*********************************************************** *******************
.ELSEIF EAX == WM_COMMAND
Mov Eax, WPARAM
.IF AX == IDC_BROWSE
*********************************************************** *******************
Invoke RTLZERMEMORY, AddR @ StopenFileName, Sizeof OpenFileName
Mov @ stopenfilename.lstructsize, sizeof @stopenfilename
Mov @ stopenfilename.flags, OFN_FILEMUSTEXIST or OFN_PATHMUSTEXIST
Push hwinmain
POP @ stopenfilename.hwndowner
Mov @ stopenfilename.lpstrfilter, Offset SzfileExt
Mov @ stopenfilename.lpstrfile, offset szfilename
Mov @ stopenfilename.nmaxfile, max_path
Invoke GetopenFileName, Addr @stopenFileName
.if EAX
Invoke setdlgitemtext, hwnd, idc_file, addr szfilename
.endif
*********************************************************** *******************
.ELSEIF AX == IDC_File
Invoke getdlgitemtext, hwnd, idc_file, addr szfilename, max_pathmov EBX, EAX
Invoke Getdlgitem, HWnd, IDOK
Invoke EnableWindow, EAX, EBX
*********************************************************** *******************
.ELSEIF AX == IDOK
Invoke getdlgitem, hwnd, idc_file
Invoke EnableWindow, EAX, FALSE
Invoke getdlgitem, hwnd, idc_browse
Invoke EnableWindow, EAX, FALSE
Invoke Getdlgitem, HWnd, IDOK
Invoke EnableWindow, EAX, FALSE
OR dwoption, f_counting
Call_countword
And dwoption, not (f_counting or f_filend)
Invoke getdlgitem, hwnd, idc_file
Invoke EnableWindow, Eax, True
Invoke getdlgitem, hwnd, idc_browse
Invoke EnableWindow, Eax, True
Invoke Getdlgitem, HWnd, IDOK
Invoke EnableWindow, Eax, True
.endif
*********************************************************** *******************
.lse
Mov Eax, False
RET
.endif
Mov Eax, True
RET
_PrOCDLGMain ENDP
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
Start:
Invoke getModuleHandle, NULL
Mov Hinstance, EAX
Invoke Dialogboxparam, Hinstance, DLG_MAIN, NULL, OFFSET _PROCDLGMAIN, NULL
Invoke EXITPROCESS, NULL
; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>
End Start
