[Rd] string comparison

Kjell Konis kjell.konis at epfl.ch
Thu Aug 7 16:03:15 CEST 2008


I have a package where I do things like this a lot:

   if(strncmp(CHAR(asChar(Scategory)), "chance", 6) == 0)
     category = h_category_chance;
   else if(strncmp(CHAR(asChar(Scategory)), "utility", 7) == 0)
     category = h_category_utility;
   else if(strncmp(CHAR(asChar(Scategory)), "decision", 8) == 0)
     category = h_category_decision;
   else if(strncmp(CHAR(asChar(Scategory)), "instance", 8) == 0)
     category = h_category_instance;
     category = h_category_error;

I would like to replace the strncmps with pointer comparisons so I set  
up some global variables in the R_init_myDLL function like this:

   charChance = install("chance")

but I can't seem to get the comparison to work. I want to do something  

   if(CHAR(asChar(Scategory)) == charChance)
     category = h_category_chance;

but category always ends up being h_category_error. Any pointers would  
be appreciated.


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