9. libcgi++ API

All C++ code generated by CGI++ must be linked against libcgi++. In this library there are some routines that you may find useful:

• void write_cgi_encoded(ostream& os, string& s);

  writes cgi encoded value of s into os

• char* sql_quote(const char* s);

  writes s properly quoted for SQL insert into the current stream . Use only in embedded C++ expressions, otherwise the results are unpredictable. Example of proper use:

     char* name = "bobo o'reilly";
     int id = 3;
     SQL_DO("insert into student($id$, '$sql_quote(name)$")
     
  

  The return value is a pointer to an empty string. It is needed only to make the streams happy. This is a trace of a hack, for which I appologize to the lovers of C++ purity. If you can think of a better way to implement the syntax of $sql_quote(s)$ without hurting performance and causing memory leaks, feel free to suggest it, or better, do it and send me a patch.

• char* sql_quote(const string& s);

  Same as the one above, except the parameter type is const string&