VERIFY_STRING_VALUE

VERIFY_STRING_VALUE( string-value )

This is useful when accepting NULL as the value to an empty or non-existing string parameter.  It will verify that the supplied parameter was a string or NULL.  If not, the macro will signal a SE_RN_BAD_PARAMS error.

Example

/////////////////////////////////////////////////////////////////////////////

//

int _scriptbar( mb_interpreter_t* s, void** l ) //( BOOL bState );

  {

  BEGIN_PARSE( s, l )

     OPT_VALUE( vFolder, MB_EMPTY_VALUE )

     OPT_VALUE( vFileName, MB_EMPTY_VALUE )

     OPT_INT( nWidth, -1 )

  END_PARSE

  VERIFY_STRING_VALUE( vFolder );

  VERIFY_STRING_VALUE( vFileName );

  RETURN_STATUS( g_this->LoadScriptBar( vFolder.value.string, vFileName.value.string, nWidth ) );

  }