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/*
** Copyright 2000-2003 Double Precision, Inc.
** See COPYING for distribution information.
**
*/
#include "unicode_config.h"
#include "unicode.h"
extern const unsigned unicode_case_hash;
extern const unicode_char unicode_case_tab[][4];
extern const unsigned unicode_case_offset[];
static unsigned find_case(unicode_char c)
{
unsigned idx= c % unicode_case_hash;
unsigned i=unicode_case_offset[idx];
unicode_char uc;
--i;
do
{
uc=unicode_case_tab[++i][0];
if (uc == c)
return (i);
} while ( (uc % unicode_case_hash) == idx);
return (0);
}
unicode_char unicode_uc(unicode_char c)
{
unsigned i=find_case(c);
return (unicode_case_tab[i][0] != c ? c:unicode_case_tab[i][1]);
}
unicode_char unicode_lc(unicode_char c)
{
unsigned i=find_case(c);
return (unicode_case_tab[i][0] != c ? c:unicode_case_tab[i][2]);
}
unicode_char unicode_tc(unicode_char c)
{
unsigned i;
unicode_char oc=c;
c=unicode_lc(c);
i=find_case(c);
return (unicode_case_tab[i][0] != c ? oc:unicode_case_tab[i][3]);
}
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