RE: How to define the expression to check if a big char st ring contai ns small char string

From: Borse, Ganesh <ganesh.borse_at_credit-suisse.com>
Date: Thu, 29 Nov 2007 16:41:54 +0800

Hi,

It could be possible that the Compile function is resolving this to the Tformula version of strstr. But I want to use the normal C++ version - which is declared in <string.h>

Yes, I making it aware to the formula about these 'variables'. If you see my code below, before calling the Define function, I cam doing "gHaVars->Define("listClients",listClients);" & "gHaVars->Define("ordClient",ordClient);"

This defines these variables.

I think this is the problem of ambiguity between the OS strstr & Tformula strstr. How do we rsolve it? Should I define one cut for strstr & add it here? I just now emailed my test program. May be some more information could be found from it.

Thanks,
Ganesh

-----Original Message-----
From: Philippe Canal [mailto:pcanal_at_fnal.gov] Sent: 29 November 2007 16:34
To: 'Borse, Ganesh'; roottalk_at_lxbuild091.cern.ch Subject: RE: [ROOT] How to define the expression to check if a big char string contai ns small char string

> For this, I am using strstr() library function in C++.
 

Are you sure it is the C++ version (as opposed to the TFormula version)?  

> Error in <THaCut::Compile>: strstr requires 2 string arguments

This sounds like the type of error message TFormula (or TTreeFormula) would issue.

If it is from TFormula/TTreeFormula, you need to make sure that the formula knows the 'variables' (listClients,ordClient) and that the formula knows that they are strings.

Cheers,
Philippe.

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From: owner-roottalk_at_root.cern.ch [mailto:owner-roottalk_at_root.cern.ch] On Behalf Of Borse, Ganesh Sent: Wednesday, November 28, 2007 10:05 PM To: 'roottalk_at_lxbuild091.cern.ch'
Subject: [ROOT] How to define the expression to check if a big char string contai ns small char string

Hi,

I am trying to "Define" an expression to check whether a long char string contains another small char string. For this, I am using strstr() library function in C++.

Expression is like this:

    THaVarList * gHaVars = new THaVarList();     THaCutList * gHaCuts = new THaCutList(gHaVars);     const char* listClients="ABCD,EFGH,HIJK,NEWONE,JUNK,DONE";     const char* ordClient = "DONE";

    gHaVars->Define("listClients",listClients); 
    gHaVars->Define("ordClient",ordClient); 
    gHaCuts->Define("Expr","((size < 1000) && (vol < (0.001 * ADV)) && (prod == value) && strstr(listClients,ordClient) )");

Program compiles fine, but when I run this program, the Define() function call fails with an error message: Error in <THaCut::Compile>: strstr requires 2 string arguments Error in <THaCutList::Define>: expression error, cut not created: Expr ((size < 1000) && (vol < (0.001 * ADV)) && (prod == value) && strstr((listClients),(ordClient)) ) block: Default

I have given the correct number & type of input parameters to strstr, but then why is the "::Compile" still failing? How can we achieve this type of checks?

Please help.

Thanks and Regards,
Ganesh

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Received on Thu Nov 29 2007 - 09:43:21 CET