1 /* Scripts of Unicode characters.
2 Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2007.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #include <config.h>
19
20 /* Specification. */
21 #include "unictype.h"
22
23 #include <string.h>
24
25 #include "scripts.h"
26 #include "unictype/scripts_byname.h"
27
28 const uc_script_t *
uc_script(ucs4_t uc)29 uc_script (ucs4_t uc)
30 {
31 unsigned int index1 = uc >> script_header_0;
32 if (index1 < script_header_1)
33 {
34 int lookup1 = u_script.level1[index1];
35 if (lookup1 >= 0)
36 {
37 unsigned int index2 = (uc >> script_header_2) & script_header_3;
38 int lookup2 = u_script.level2[lookup1 + index2];
39 if (lookup2 >= 0)
40 {
41 unsigned int index3 = (uc & script_header_4);
42 unsigned char lookup3 = u_script.level3[lookup2 + index3];
43
44 if (lookup3 != 0xff)
45 return &scripts[lookup3];
46 }
47 }
48 }
49 return NULL;
50 }
51
52 const uc_script_t *
uc_script_byname(const char * script_name)53 uc_script_byname (const char *script_name)
54 {
55 const struct named_script *found;
56
57 found = uc_script_lookup (script_name, strlen (script_name));
58 if (found != NULL)
59 return &scripts[found->index];
60 else
61 return NULL;
62 }
63
64 bool
uc_is_script(ucs4_t uc,const uc_script_t * script)65 uc_is_script (ucs4_t uc, const uc_script_t *script)
66 {
67 return uc_script (uc) == script;
68 }
69
70 void
uc_all_scripts(const uc_script_t ** scriptsp,size_t * countp)71 uc_all_scripts (const uc_script_t **scriptsp, size_t *countp)
72 {
73 *scriptsp = scripts;
74 *countp = sizeof (scripts) / sizeof (scripts[0]);
75 }
76