How to search faster?

[Edwin Knoppert]

I need a faster instr() preferably an asm procedure because of our own created mem. blocks.

We have strings with unique string id's.
We need a very fast lookup method.


??


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[Semen Matusovski]

Edwin --
Pb Instr works fine.
If you will locate a "length" field before string data and will create fictive String Ptr, you can full PB.

   #Compile Exe
   #Dim All

   Declare Function CoTaskMemAlloc Lib "ole32.dll" Alias "CoTaskMemAlloc" (ByVal Dword) As Dword
   Declare Sub CoTaskMemFree Lib "ole32.dll" Alias "CoTaskMemFree" (ByVal Dword)

   Function PbMain

      %nLen = 100000
      
      Dim hMem As Dword Ptr

      hMem = CoTaskMemAlloc(%nLen + 9)

      @hMem = hMem + 8
      @hMem[1] = %nLen

      Local pS As String Ptr
      pS = hMem
      
      MsgBox "Addr = " + "&H" + Hex$(StrPtr(@ps)) + " Len =" + Str$(Len(@ps)),, "Compare with next step"
      
      Lset @ps = "This is a test"
      
      MsgBox "Addr = " + "&H" + Hex$(StrPtr(@ps)) + " Len =" + Str$(Len(@ps)),, "Should be the same"
      
      MsgBox "Instr =" + Str$(Instr(@ps, "test"))
      
      CoTaskMemFree hMem

   End Function

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[This message has been edited by Semen Matusovski (edited December 18, 2000).]

[Edwin Knoppert]

Well, i have to figure this one out too.
It looks as complex as my question about dynamic strings..
But it might indeed be solved by using a simple string ptr.

But why do you use the 'CoTaskMemAlloc' api?
Is this one faster or so?

Thanks,



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[Semen Matusovski]

florent tried to compared http://www.powerbasic.com/support/pb...ead.php?t=2746
speed - maybe a little faster.
i can name a lot of arguments, for example, msdn de-facto also recommends cotask: "the cotaskmemalloc function has the advantage of working well in either c, c++, or visual basic. it is also the only way to share memory in a com-based application, since midl uses cotaskmemalloc and cotaskmemfree to marshal memory.".
but a real reason is - more comfortable than heap.

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[Edwin Knoppert]

The marshalling aspect, did you ever done that?

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