Detect Drives: Difference between revisions
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[[{{ns:14}}:Disk, Path & File Functions]] |
Revision as of 05:45, 1 May 2005
Author: deguix (talk, contrib) |
Description
Superseded by: GetDrives function.
Requires: System plugin.
This function detects available drives and return their letters (with colon and foward slash, like C:/).
Function Call
Push "([Hard Drives][CDROM Drives][Diskette Drives][RAM Drives][Network Drives]|All Drives|All Local Drives|Basic Drives|Disk Needed Drives)" ; Drive types used for the search. See "Drive Types". Push $0 GetFunctionAddress $0 "CallbackFunction" ; Custom callback function name. Exch $0 Call DetectDrives
Drive Types
- Hard Drives
- CDROM Drives
- Diskette Drives
- RAM Drives
- Network Drives
You can format the string as you like, but have to be the above strings to work. Some examples:
- Hard Drives and worst but useful Diskette Drives.
- CDROM DrivesDiskette Drives.
- Essential Network Drives and the really needed Hard Drives.
You can also use:
- All Drives (= Hard Drives, CDROM Drives, Diskette Drives, RAM Drives, Network Drives)
- All Local Drives (= Hard Drives, CDROM Drives, Diskette Drives, RAM Drives)
- Basic Drives (= Hard Drives, CDROM Drives, Diskette Drives)
- Disk Needed Drives (= CDROM Drives, Diskette Drives)
How to Use Callback Function
- You have to push "Stop" to stop, or anything to continue the search, if you don't push, will occur the stack corruption.
- Do not push values on the stack without poping them later unless it's the return value.
- You can use any variables, but $R0 has function result, the drive letter detected.
Function Code
;---------------------------------------------------------------------------- ; Superseded by : GetDrives function. ;---------------------------------------------------------------------------- ; Title : Detect drives ; Short Name : DetectDrives ; Last Changed : 22/Feb/2005 ; Code Type : Function ; Code Sub-Type : One-way Input, Callback Dependant ;---------------------------------------------------------------------------- ; Required : System plugin. ; Description : Detects available drives and return their letters ; (with colon and foward slash, like C:/). ;---------------------------------------------------------------------------- ; Function Call : Push "([Hard Drives][CDROM Drives][Diskette Drives] ; [RAM Drives][Network Drives]|All Drives|All Local ; Drives|Basic Drives|Disk Needed Drives)" ; Drive types used for the search. ; ; Push $0 ; ; GetFunctionAddress $0 "CallbackFunction" ; Custom callback function name where the search is ; returned to. ; ; Exch $0 ; Call DetectDrives ;---------------------------------------------------------------------------- ; Callback Variables: $R0 - Drive letter detected with ":/" (like C:/). ;---------------------------------------------------------------------------- ; Author : Diego Pedroso ; Author Reg. Name : deguix ;---------------------------------------------------------------------------- Function DetectDrives Exch Exch $R0 Exch Exch $R1 Push $R2 Push $R3 Push $R4 Push $R5 Push $0 Push $1 StrCpy $R4 $R1 # Drives Conversion StrCmp $R0 "All Drives" 0 +2 StrCpy $R0 "Hard Drives, CDROM Drives, Diskette Drives, RAM Drives, \ Network Drives" StrCmp $R0 "All Local Drives" 0 +2 StrCpy $R0 "Hard Drives, CDROM Drives, Diskette Drives, RAM Drives" StrCmp $R0 "Basic Drives" 0 +2 StrCpy $R0 "Hard Drives, CDROM Drives, Diskette Drives" StrCmp $R0 "Disk Needed Drives" 0 +2 StrCpy $R0 "CDROM Drives, Diskette Drives" # Memory for paths System::Alloc 1024 Pop $R1 # Get drives System::Call 'kernel32::GetLogicalDriveStringsA(i, i) i(1024, R1)' enumok: # One more drive? System::Call 'kernel32::lstrlenA(t) i(i R1) .R2' IntCmp $R2 0 enumex # Now, search for drives according to user conditions System::Call 'kernel32::GetDriveTypeA(t) i (i R1) .R3' StrCpy $2 0 Search: IntOp $2 $2 + 1 StrCmp $2 1 0 +3 StrCpy $0 "Hard Drives" StrCpy $1 3 StrCmp $2 2 0 +3 StrCpy $0 "CDROM Drives" StrCpy $1 5 StrCmp $2 3 0 +3 StrCpy $0 "Diskette Drives" StrCpy $1 2 StrCmp $2 4 0 +3 StrCpy $0 "RAM Drives" StrCpy $1 6 StrCmp $2 5 0 +3 StrCpy $0 "Network Drives" StrCpy $1 4 IntCmp $2 6 enumnext 0 enumnext Push $R1 Push $R2 Push $R3 Push $R4 Push $R5 StrLen $R3 $0 StrCpy $R4 0 loop: StrCpy $R5 $R0 $R3 $R4 StrCmp $R5 $0 done StrCmp $R5 "" done IntOp $R4 $R4 + 1 Goto loop done: StrCpy $R1 $R0 "" $R4 StrCmp $R1 "" 0 +7 Pop $R5 Pop $R4 Pop $R3 Pop $R2 Pop $R1 Goto Search Pop $R5 Pop $R4 Pop $R3 Pop $R2 Pop $R1 StrCmp $R3 $1 0 Search # Get drive path string System::Call '*$R1(&t1024 .R3)' # Prepare variables for the Callback function Push $R4 Push $R3 Push $R2 Push $R1 Push $R0 StrCpy $R0 $R3 # Call the Callback function Call $R4 # Return variables Push $R5 Exch Pop $R5 Exch Pop $R0 Exch Pop $R1 Exch Pop $R2 Exch Pop $R3 Exch Pop $R4 StrCmp $R5 "Stop" 0 +3 Pop $R5 Goto enumex Pop $R5 enumnext: # Next drive path IntOp $R1 $R1 + $R2 IntOp $R1 $R1 + 1 goto enumok # End Search enumex: # Free memory used for paths System::Free $R1 # Return original user variables Pop $0 Pop $1 Pop $R5 Pop $R4 Pop $R3 Pop $R2 Pop $R1 Pop $R0 FunctionEnd