Mar 27, 2010

Doing a case insensitive find in C++

Surprisingly the standard C++ library doesn’t provide support for doing a case insensitive search on a string. The boost library might and there is almost certainly a traits class out there that you could use for this but if like me you’re in the embedded world and want a very fast and lightweight solution, you can use the ostringstream class and the uppercase formatter from <ios> for a quick-fix.  Doing it this way you can avoid calling the C library uppercase on every character in the string.  So in addition to the case insensitive find you get a nice ToUpper() method for strings. Sure wish C++  extension methods were here and I could make these look like part of the native string class.


FindInsensitive() just converts both strings to uppercase and then uses the normal find() member function.

About Me

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Tod Gentille (@todgentille) is now a Curriculum Director for Pluralsight. He's been programming professionally since well before you were born and was a software consultant for most of his career. He's also a father, husband, drummer, and windsurfer. He wants to be a guitar player but he just hasn't got the chops for it.