Performance issues

The case-conversion functions assign the destination character regardless of whether the source character has a case-equivalent character. If no case equivalent for a particular source character exists, the functions return only the source character. Therefore, the following two algorithms perform the same task:

• Calling the case-conversion function regardless of the existence of a case-equivalent character, as follows:

  dst_wc = ifx_gl_towlower(src_wc);

• Calling the case-conversion function only if a case-equivalent character exists, as follows:

  if ( ifx_gl_iswupper(src_wc) )
     dst_wc = ifx_gl_towlower(src_wc);
  else
     dst_wc = src_wc;