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Tcl_UtfToUpper C API

Routines for manipulating the case of Unicode characters and UTF-8 strings

Also documents Tcl_UniCharToUpper, Tcl_UniCharToLower, Tcl_UniCharToTitle, Tcl_UtfToLower, Tcl_UtfToTitle

literal type exactly as shown argument replace with your value ?optional? may be omitted

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 the TUTF-8 byte sequence to be converted in place.

Description#

N.B. Refer to the Tcl_UniChar documentation page for a description of the TUTF-8 encoding and related terms referenced here.

The first three routines convert the case of individual Unicode characters:

If ch represents a lower-case character, Tcl_UniCharToUpper returns the corresponding upper-case character. If no upper-case character is defined, 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 defined, 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 null-terminated TUTF-8 byte sequences in place in memory:

Tcl_UtfToUpper changes every TUTF-8 encoded character in str to upper-case. Because 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 original string length.

Tcl_UtfToLower is the same as Tcl_UtfToUpper except it turns each character 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 following characters into their lower-case equivalents.

Keywords#

utf · unicode · toupper · tolower · totitle · case

Copyright#

• Copyright © 1997 Sun Microsystems, Inc