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NSIS/Docs/src/usefulfunc.but
rainwater 584d3d2524 Updated docs 
git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@1739 212acab6-be3b-0410-9dea-997c60f758d6
2002-11-15 18:45:47 +00:00

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\A{usefulfunctions} Useful functions
\H{getparent} Get parent directory
\c ; GetParent
\c ; input, top of stack (e.g. C:\Program Files\Poop)
\c ; output, top of stack (replaces, with e.g. C:\Program Files)
\c ; modifies no other variables.
\c ;
\c ; Usage:
\c ; Push "C:\Program Files\Directory\Whatever"
\c ; Call GetParent
\c ; Pop $R0
\c ; ; at this point $R0 will equal "C:\Program Files\Directory"
\c
\c Function GetParent
\c Exch $R0 ; old $R0 is on top of stack
\c Push $R1
\c Push $R2
\c StrCpy $R1 -1
\c loop:
\c StrCpy $R2 $R0 1 $R1
\c StrCmp $R2 "" exit
\c StrCmp $R2 "\" exit
\c IntOp $R1 $R1 - 1
\c Goto loop
\c exit:
\c StrCpy $R0 $R0 $R1
\c Pop $R2
\c Pop $R1
\c Exch $R0 ; put $R0 on top of stack, restore $R0 to original value
\c FunctionEnd
\H{trimnewlines} Trim newlines
\c ; TrimNewlines
\c ; input, top of stack (e.g. whatever$\r$\n)
\c ; output, top of stack (replaces, with e.g. whatever)
\c ; modifies no other variables.
\c
\c Function TrimNewlines
\c Exch $R0
\c Push $R1
\c Push $R2
\c StrCpy $R1 0
\c loop:
\c IntOp $R1 $R1 - 1
\c StrCpy $R2 $R0 1 $R1
\c StrCmp $R2 "$\r" loop
\c StrCmp $R2 "$\n" loop
\c IntOp $R1 $R1 + 1
\c
\c StrCpy $R0 $R0 $R1
\c Pop $R2
\c Pop $R1
\c Exch $R0
\c FunctionEnd
\H{getparameters} Get command line parameters
\c ; GetParameters
\c ; input, none
\c ; output, top of stack (replaces, with e.g. whatever)
\c ; modifies no other variables.
\c
\c Function GetParameters
\c Push $R0
\c Push $R1
\c Push $R2
\c StrCpy $R0 $CMDLINE 1
\c StrCpy $R1 '"'
\c StrCpy $R2 1
\c StrCmp $R0 '"' loop
\c StrCpy $R1 ' ' ; we're scanning for a space instead of a quote
\c loop:
\c StrCpy $R0 $CMDLINE 1 $R2
\c StrCmp $R0 $R1 loop2
\c StrCmp $R0 "" loop2
\c IntOp $R2 $R2 + 1
\c Goto loop
\c loop2:
\c IntOp $R2 $R2 + 1
\c StrCpy $R0 $CMDLINE 1 $R2
\c StrCmp $R0 " " loop2
\c StrCpy $R0 $CMDLINE "" $R2
\c Pop $R2
\c Pop $R1
\c Exch $R0
\c FunctionEnd
\H{strstr} Search in a string
\c ; StrStr
\c ; input, top of stack = string to search for
\c ; top of stack-1 = string to search in
\c ; output, top of stack (replaces with the portion of the string remaining)
\c ; modifies no other variables.
\c ;
\c ; Usage:
\c ; Push "this is a long ass string"
\c ; Push "ass"
\c ; Call StrStr
\c ; Pop $R0
\c ; ($R0 at this point is "ass string")
\c
\c Function StrStr
\c Exch $R1 ; st=haystack,old$R1, $R1=needle
\c Exch ; st=old$R1,haystack
\c Exch $R2 ; st=old$R1,old$R2, $R2=haystack
\c Push $R3
\c Push $R4
\c Push $R5
\c StrLen $R3 $R1
\c StrCpy $R4 0
\c ; $R1=needle
\c ; $R2=haystack
\c ; $R3=len(needle)
\c ; $R4=cnt
\c ; $R5=tmp
\c loop:
\c StrCpy $R5 $R2 $R3 $R4
\c StrCmp $R5 $R1 done
\c StrCmp $R5 "" done
\c IntOp $R4 $R4 + 1
\c Goto loop
\c done:
\c StrCpy $R1 $R2 "" $R4
\c Pop $R5
\c Pop $R4
\c Pop $R3
\c Pop $R2
\c Exch $R1
\c FunctionEnd
\H{getwindowsversion} Get Windows version
\c ; GetWindowsVersion
\c ;
\c ; Based on Yazno's function, http://yazno.tripod.com/powerpimpit/
\c ; Returns on top of stack
\c ;
\c ; Windows Version (95, 98, ME, NT x.x, 2000, XP, .NET Server)
\c ; or
\c ; '' (Unknown Windows Version)
\c ;
\c ; Usage:
\c ; Call GetWindowsVersion
\c ; Pop $R0
\c ; ; at this point $R0 is "NT 4.0" or whatnot
\c
\c Function GetWindowsVersion
\c Push $R0
\c Push $R1
\c ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows NT\CurrentVersion" CurrentVersion
\c StrCmp $R0 "" 0 lbl_winnt
\c ; we are not NT.
\c ReadRegStr $R0 HKLM SOFTWARE\Microsoft\Windows\CurrentVersion VersionNumber
\c
\c StrCpy $R1 $R0 1
\c StrCmp $R1 '4' 0 lbl_error
\c
\c StrCpy $R1 $R0 3
\c
\c StrCmp $R1 '4.0' lbl_win32_95
\c StrCmp $R1 '4.9' lbl_win32_ME lbl_win32_98
\c
\c lbl_win32_95:
\c StrCpy $R0 '95'
\c Goto lbl_done
\c
\c lbl_win32_98:
\c StrCpy $R0 '98'
\c Goto lbl_done
\c
\c lbl_win32_ME:
\c StrCpy $R0 'ME'
\c Goto lbl_done
\c
\c lbl_winnt:
\c
\c StrCpy $R1 $R0 1
\c
\c StrCmp $R1 '3' lbl_winnt_x
\c StrCmp $R1 '4' lbl_winnt_x
\c
\c StrCpy $R1 $R0 3
\c
\c StrCmp $R1 '5.0' lbl_winnt_2000 lbl_error
\c StrCmp $R1 '5.1' lbl_winnt_XP lbl_error
\c StrCmp $R1 '5.2' lbl_winnt_dotNET lbl_error
\c
\c lbl_winnt_x:
\c StrCpy $R0 "NT $R0" 6
\c Goto lbl_done
\c
\c lbl_winnt_2000:
\c Strcpy $R0 '2000'
\c Goto lbl_done
\c
\c lbl_winnt_XP:
\c Strcpy $R0 'XP'
\c Goto lbl_done
\c
\c lbl_winnt_dotNET:
\c Strcpy $R0 '.NET Server'
\c Goto lbl_done
\c
\c lbl_error:
\c Strcpy $R0 ''
\c lbl_done:
\c Pop $R1
\c Exch $R0
\c FunctionEnd
\H{getieversion} Get Internet Explorer version
\c ; GetIEVersion
\c ;
\c ; Based on Yazno's function, http://yazno.tripod.com/powerpimpit/
\c ; Returns on top of stack
\c ; 1-6 (Installed IE Version)
\c ; or
\c ; '' (IE is not installed)
\c ;
\c ; Usage:
\c ; Call GetIEVersion
\c ; Pop $R0
\c ; ; at this point $R0 is "5" or whatnot
\c
\c Function GetIEVersion
\c Push $R0
\c ClearErrors
\c ReadRegStr $R0 HKLM "Software\Microsoft\Internet Explorer" "Version"
\c IfErrors lbl_123 lbl_456
\c
\c lbl_456: ; ie 4+
\c Strcpy $R0 $R0 1
\c Goto lbl_done
\c
\c lbl_123: ; older ie version
\c ClearErrors
\c ReadRegStr $R0 HKLM "Software\Microsoft\Internet Explorer" "IVer"
\c IfErrors lbl_error
\c
\c StrCpy $R0 $R0 3
\c StrCmp $R0 '100' lbl_ie1
\c StrCmp $R0 '101' lbl_ie2
\c StrCmp $R0 '102' lbl_ie2
\c
\c StrCpy $R0 '3' ; default to ie3 if not 100, 101, or 102.
\c Goto lbl_done
\c lbl_ie1:
\c StrCpy $R0 '1'
\c Goto lbl_done
\c lbl_ie2:
\c StrCpy $R0 '2'
\c Goto lbl_done
\c lbl_error:
\c StrCpy $R0 ''
\c lbl_done:
\c Exch $R0
\c FunctionEnd
\H{isflashinstalled} Is Macromedia Flash Player installed?
\c ; IsFlashInstalled
\c ;
\c ; By Yazno, http://yazno.tripod.com/powerpimpit/
\c ; Returns on top of stack
\c ; 0 (Flash is not installed)
\c ; or
\c ; 1 (Flash is installed)
\c ;
\c ; Usage:
\c ; Call IsFlashInstalled
\c ; Pop $R0
\c ; ; $R0 at this point is "1" or "0"
\c
\c Function IsFlashInstalled
\c Push $R0
\c ClearErrors
\c ReadRegStr $R0 HKCR "CLSID\{D27CDB6E-AE6D-11cf-96B8-444553540000}" ""
\c IfErrors lbl_na
\c StrCpy $R0 1
\c Goto lbl_end
\c lbl_na:
\c StrCpy $R0 0
\c lbl_end:
\c Exch $R0
\c FunctionEnd
\H{addshareddll} Add a shared DLL
\c ; AddSharedDLL
\c ;
\c ; Increments a shared DLLs reference count.
\c ; Use by passing one item on the stack (the full path of the DLL).
\c ;
\c ; Usage:
\c ; Push $SYSDIR\myDll.dll
\c ; Call AddSharedDLL
\c ;
\c
\c Function AddSharedDLL
\c Exch $R1
\c Push $R0
\c ReadRegDword $R0 HKLM Software\Microsoft\Windows\CurrentVersion\SharedDLLs $R1
\c IntOp $R0 $R0 + 1
\c WriteRegDWORD HKLM Software\Microsoft\Windows\CurrentVersion\SharedDLLs $R1 $R0
\c Pop $R0
\c Pop $R1
\c FunctionEnd
\H{unremovesharedll} Remove a shared DLL
\c ; un.RemoveSharedDLL
\c ;
\c ; Decrements a shared DLLs reference count, and removes if necessary.
\c ; Use by passing one item on the stack (the full path of the DLL).
\c ; Note: for use in the main installer (not the uninstaller), rename the
\c ; function to RemoveSharedDLL.
\c ;
\c ; Usage:
\c ; Push $SYSDIR\myDll.dll
\c ; Call un.RemoveSharedDLL
\c ;
\c
\c Function un.RemoveSharedDLL
\c Exch $R1
\c Push $R0
\c ReadRegDword $R0 HKLM Software\Microsoft\Windows\CurrentVersion\SharedDLLs $R1
\c StrCmp $R0 "" remove
\c IntOp $R0 $R0 - 1
\c IntCmp $R0 0 rk rk uk
\c rk:
\c DeleteRegValue HKLM Software\Microsoft\Windows\CurrentVersion\SharedDLLs $R1
\c goto Remove
\c uk:
\c WriteRegDWORD HKLM Software\Microsoft\Windows\CurrentVersion\SharedDLLs $R1 $R0
\c Goto noremove
\c remove:
\c Delete /REBOOTOK $R1
\c noremove:
\c Pop $R0
\c Pop $R1
\c FunctionEnd
\H{upgradedll} Upgrade a DLL (macro)
\c ; Macro - Upgrade DLL File
\c ; Written by Joost Verburg
\c ; ------------------------
\c ;
\c ; Example of usage:
\c ; !insertmacro UpgradeDLL "dllname.dll" "$SYSDIR\dllname.dll"
\c ;
\c ; !define UPGRADEDLL_NOREGISTER if you want to upgrade a DLL which cannot be registered
\c ;
\c ; Note that this macro sets overwrite to TRY. Change it back to whatever you want after
\c ; you insert the macro.
\c
\c !macro UpgradeDLL LOCALFILE DESTFILE
\c
\c Push $R0
\c Push $R1
\c Push $R2
\c Push $R3
\c
\c ;------------------------
\c ;Check file and version
\c
\c IfFileExists "${DESTFILE}" "" "copy_${LOCALFILE}"
\c
\c ClearErrors
\c GetDLLVersionLocal "${LOCALFILE}" $R0 $R1
\c GetDLLVersion "${DESTFILE}" $R2 $R3
\c IfErrors "upgrade_${LOCALFILE}"
\c
\c IntCmpU $R0 $R2 "" "done_${LOCALFILE}" "upgrade_${LOCALFILE}"
\c IntCmpU $R1 $R3 "done_${LOCALFILE}" "done_${LOCALFILE}" "upgrade_${LOCALFILE}"
\c
\c ;------------------------
\c ;Let's upgrade the DLL!
\c
\c SetOverwrite try
\c
\c "upgrade_${LOCALFILE}:"
\c !ifndef UPGRADEDLL_NOREGISTER
\c ;Unregister the DLL
\c UnRegDLL "${DESTFILE}"
\c !endif
\c
\c ;------------------------
\c ;Try to copy the DLL directly
\c
\c ClearErrors
\c StrCpy $R0 "${DESTFILE}"
\c Call ":file_${LOCALFILE}"
\c IfErrors "" "noreboot_${LOCALFILE}"
\c
\c ;------------------------
\c ;DLL is in use. Copy it to a temp file and Rename it on reboot.
\c
\c GetTempFileName $R0
\c Call ":file_${LOCALFILE}"
\c Rename /REBOOTOK $R0 "${DESTFILE}"
\c
\c ;------------------------
\c ;Register the DLL on reboot
\c
\c !ifndef UPGRADEDLL_NOREGISTER
\c WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\RunOnce" \
\c "Register ${DESTFILE}" '"$SYSDIR\rundll32.exe" "${DESTFILE},DllRegisterServer"'
\c !endif
\c
\c Goto "done_${LOCALFILE}"
\c
\c ;------------------------
\c ;DLL does not exist - just extract
\c
\c "copy_${LOCALFILE}:"
\c StrCpy $R0 "${DESTFILE}"
\c Call ":file_${LOCALFILE}"
\c
\c ;------------------------
\c ;Register the DLL
\c
\c "noreboot_${LOCALFILE}:"
\c !ifndef UPGRADEDLL_NOREGISTER
\c RegDLL "${DESTFILE}"
\c !endif
\c
\c ;------------------------
\c ;Done
\c
\c "done_${LOCALFILE}:"
\c
\c Pop $R3
\c Pop $R2
\c Pop $R1
\c Pop $R0
\c
\c ;------------------------
\c ;End
\c
\c Goto "end_${LOCALFILE}"
\c
\c ;------------------------
\c ;Called to extract the DLL
\c
\c "file_${LOCALFILE}:"
\c File /oname=$R0 "${LOCALFILE}"
\c Return
\c
\c "end_${LOCALFILE}:"
\c
\c !macroend
\H{morefuncs} More
You can find more useful functions at \W{http://www.clantpa.co.uk/nsis/wiki/}{Sunjammer's NSIS Archive}, \W{http://forums.winamp.com/forumdisplay.php?s=&forumid=65}{the NSIS forum} and \W{http://nsis.sourceforge.net/}{NSIS development page}.
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