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/* Scripts of Unicode characters.
Copyright (C) 2007, 2009-2022 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2007.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "unictype.h"
#include <string.h>
#include "scripts.h"
#include "unictype/scripts_byname.h"
const uc_script_t *
uc_script (ucs4_t uc)
{
unsigned int index1 = uc >> script_header_0;
if (index1 < script_header_1)
{
int lookup1 = u_script.level1[index1];
if (lookup1 >= 0)
{
unsigned int index2 = (uc >> script_header_2) & script_header_3;
int lookup2 = u_script.level2[lookup1 + index2];
if (lookup2 >= 0)
{
unsigned int index3 = (uc & script_header_4);
unsigned char lookup3 = u_script.level3[lookup2 + index3];
if (lookup3 != 0xff)
return &scripts[lookup3];
}
}
}
return NULL;
}
const uc_script_t *
uc_script_byname (const char *script_name)
{
const struct named_script *found;
found = uc_script_lookup (script_name, strlen (script_name));
if (found != NULL)
return &scripts[found->index];
else
return NULL;
}
bool
uc_is_script (ucs4_t uc, const uc_script_t *script)
{
return uc_script (uc) == script;
}
void
uc_all_scripts (const uc_script_t **scriptsp, size_t *countp)
{
*scriptsp = scripts;
*countp = sizeof (scripts) / sizeof (scripts[0]);
}
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