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/*
* tclUtf.c --
*
* Routines for manipulating UTF-8 strings.
*
* Copyright (c) 1997-1998 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclUtf.c,v 1.2 1999/04/16 00:46:55 stanton Exp $
* RCS: @(#) $Id: tclUtf.c,v 1.3 1999/04/29 00:04:41 hershey Exp $
*/
#include "tclInt.h"
/*
* Include the static character classification tables and macros.
*/
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#if TCL_UTF_MAX > 5
6,6,6,6
#else
1,1,1,1
#endif
};
/*
* Procedures used only in this module.
*/
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*----------------------------------------------------------------------
*/
int
Tcl_UtfToUpper(str)
char *str; /* String to convert in place. */
{
Tcl_UniChar ch;
Tcl_UniChar ch, upChar;
char *src, *dst;
int bytes;
src += Tcl_UtfToUniChar(src, &ch);
dst += Tcl_UniCharToUtf(Tcl_UniCharToUpper(ch), dst);
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*----------------------------------------------------------------------
*/
int
Tcl_UtfToLower(str)
char *str; /* String to convert in place. */
{
Tcl_UniChar ch;
Tcl_UniChar ch, lowChar;
char *src, *dst;
int bytes;
/*
* Iterate over the string until we hit the terminating null.
*/
src = dst = str;
while (*src) {
src += Tcl_UtfToUniChar(src, &ch);
dst += Tcl_UniCharToUtf(Tcl_UniCharToLower(ch), dst);
bytes = Tcl_UtfToUniChar(src, &ch);
lowChar = Tcl_UniCharToLower(ch);
/*
* To keep badly formed Utf strings from getting inflated by
* the conversion (thereby causing a segfault), only copy the
* lower case char to dst if its size is <= the original char.
*/
if (bytes < UtfCount(lowChar)) {
memcpy(dst, src, (size_t) bytes);
dst += bytes;
} else {
dst += Tcl_UniCharToUtf(lowChar, dst);
}
src += bytes;
}
*dst = '\0';
return (dst - str);
}
/*
*----------------------------------------------------------------------
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