FileReadFromEnd: Difference between revisions
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[[ | [[Category:Text Files Manipulation Functions]] |
Revision as of 12:11, 24 June 2005
Author: Instructor (talk, contrib) |
Links
- Latest version of headers "nsh.zip"
- http://forums.winamp.com/showthread.php?s=&threadid=203228&goto=lastpost
If function used without header then put function in script before call it
The Function
/* ____________________________________________________________________________ FileReadFromEnd v1.2 ____________________________________________________________________________ Read text file from end line by line. Syntax: ${FileReadFromEnd} "[File]" "Function" "[File]" ; Input text file "Function" ; Callback function Function "Function" ; $9 current line ; $8 current line number ; $7 current line negative number ; $R0-$R9 are not used (save data in them). ; ... Push $var ; If $var="StopFileReadFromEnd" Then exit from function FunctionEnd Note: -Error flag if input file isn't exists Example1: Section ${FileReadFromEnd} "C:\a.log" "Example1" IfErrors 0 +2 MessageBox MB_OK "Error" SectionEnd Function Example1 MessageBox MB_OKCANCEL '"Line"=[$9]$\n "#"=[$8]$\n "-#"=[$7]' IDOK +2 StrCpy $0 StopFileReadFromEnd Push $0 FunctionEnd Example2 (Reverse text file): Section GetTempFileName $R0 FileOpen $R1 $R0 w ${FileReadFromEnd} "C:\a.log" "Example2" FileClose $R1 IfErrors 0 +2 MessageBox MB_OK "Error" IDOK +2 Exec '"notepad.exe" "$R0"' SectionEnd Function Example2 StrCmp $7 -1 0 +5 StrCpy $1 $9 1 -1 StrCmp $1 '$\n' +3 StrCmp $1 '$\r' +2 StrCpy $9 '$9$\r$\n' FileWrite $R1 "$9" Push $0 FunctionEnd*/ ;--------------------------------------------------------------------------- Function FileReadFromEnd !define FileReadFromEnd `!insertmacro FileReadFromEndCall` !macro FileReadFromEndCall _FILE _FUNC Push $0 Push `${_FILE}` GetFunctionAddress $0 `${_FUNC}` Push `$0` Call FileReadFromEnd Pop $0 !macroend Exch $1 Exch Exch $0 Exch Push $7 Push $8 Push $9 ClearErrors StrCpy $7 -1 StrCpy $8 0 IfFileExists $0 0 error FileOpen $0 $0 r IfErrors error FileRead $0 $9 IfErrors +4 Push $9 IntOp $8 $8 + 1 goto -4 FileClose $0 nextline: StrCmp $8 0 end Pop $9 Push $1 Push $7 Push $8 Call $1 Pop $0 Pop $8 Pop $7 Pop $1 IntOp $7 $7 - 1 IntOp $8 $8 - 1 IfErrors error StrCmp $0 'StopFileReadFromEnd' clearstack nextline error: SetErrors clearstack: StrCmp $8 0 end Pop $9 IntOp $8 $8 - 1 goto clearstack end: Pop $9 Pop $8 Pop $7 Pop $1 Pop $0 FunctionEnd