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Tcl_UtfToUpper(3)	    Tcl	Library	Procedures	     Tcl_UtfToUpper(3)

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NAME
       Tcl_UniCharToUpper,	 Tcl_UniCharToLower,	   Tcl_UniCharToTitle,
       Tcl_UtfToUpper, Tcl_UtfToLower, Tcl_UtfToTitle -	routines  for  manipu-
       lating the case of Unicode characters and UTF-8 strings

SYNOPSIS
       #include	<tcl.h>

       int
       Tcl_UniCharToUpper(ch)

       int
       Tcl_UniCharToLower(ch)

       int
       Tcl_UniCharToTitle(ch)

       Tcl_Size
       Tcl_UtfToUpper(str)

       Tcl_Size
       Tcl_UtfToLower(str)

       Tcl_Size
       Tcl_UtfToTitle(str)

ARGUMENTS
       int ch (in)	       The Unicode character to	be converted.

       char *str (in/out)      Pointer	to  UTF-8  string  to  be converted in
			       place.
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DESCRIPTION
       The first three routines	convert	the case of individual Unicode charac-
       ters:

       If ch represents	a lower-case character,	Tcl_UniCharToUpper returns the
       corresponding upper-case	character.  If no upper-case character is  de-
       fined, it returns the character unchanged.

       If  ch  represents  an upper-case character, Tcl_UniCharToLower returns
       the corresponding lower-case character.	If no lower-case character  is
       defined,	it returns the character unchanged.

       If ch represents	a lower-case character,	Tcl_UniCharToTitle returns the
       corresponding  title-case character.  If	no title-case character	is de-
       fined, it returns the corresponding upper-case character.  If no	upper-
       case character is defined, it returns the character unchanged.	Title-
       case  is	defined	for a small number of characters that have a different
       appearance when they are	at the beginning of a capitalized word.

       The next	three routines convert the case	of UTF-8 strings in  place  in
       memory:

       Tcl_UtfToUpper changes every UTF-8 character in str to upper-case.  Be-
       cause  changing	the  case of a character may change its	size, the byte
       offset of each character	in the resulting string	may  differ  from  its
       original	location.  Tcl_UtfToUpper writes a null	byte at	the end	of the
       converted  string.  Tcl_UtfToUpper returns the new length of the	string
       in bytes.  This new length is guaranteed	to be no longer	than the orig-
       inal string length.

       Tcl_UtfToLower is the same as Tcl_UtfToUpper except it turns each char-
       acter in	the string into	its lower-case equivalent.

       Tcl_UtfToTitle is the same as Tcl_UtfToUpper except it turns the	 first
       character  in the string	into its title-case equivalent and all follow-
       ing characters into their lower-case equivalents.

KEYWORDS
       utf, unicode, toupper, tolower, totitle,	case

Tcl				      8.1		     Tcl_UtfToUpper(3)

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