Question

example: “select * from somewhere where x = 1“

I want to find the whitespace-delimited “where“, but not the “where” within “somewhere“. In the example “where” is delimited by spaces, but it could be carriage returns, tabs etc.

Note: I know regex would make it easy to do (the regex equivalent would be “\bwhere\b“), but I don’t want to add a regex library to my project just to do this.

Answer 1

If you wanted to use the pure MFC method of string manipulation, then this should work:

CString strSql = _T("select * from somewhere where x = 1");

int nTokenPos = 0;
CString strToken = strSql.Tokenize(_T(" \r\n\t"), nTokenPos);

while (!strToken.IsEmpty())
{
    if (strToken.Trim().CompareNoCase(_T("where")) == 0)
        return TRUE; // found
    strToken = strSql.Tokenize(_T(" \r\n\t"), nTokenPos);
}

return FALSE; // not found