1/* Functions for JISX0213 conversion.
2 Copyright (C) 2002-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _JISX0213_H
20#define _JISX0213_H 1
21
22#include <stdint.h>
23
24extern const uint16_t __jisx0213_to_ucs_combining[][2];
25extern const uint16_t __jisx0213_to_ucs_main[120 * 94];
26extern const uint32_t __jisx0213_to_ucs_pagestart[];
27extern const int16_t __jisx0213_from_ucs_level1[2715];
28extern const uint16_t __jisx0213_from_ucs_level2[];
29
30#define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))
31
32static inline uint32_t
33__attribute ((always_inline))
34jisx0213_to_ucs4 (unsigned int row, unsigned int col)
35{
36 uint32_t val;
37
38 if (row >= 0x121 && row <= 0x17e)
39 row -= 289;
40 else if (row == 0x221)
41 row -= 451;
42 else if (row >= 0x223 && row <= 0x225)
43 row -= 452;
44 else if (row == 0x228)
45 row -= 454;
46 else if (row >= 0x22c && row <= 0x22f)
47 row -= 457;
48 else if (row >= 0x26e && row <= 0x27e)
49 row -= 519;
50 else
51 return 0x0000;
52
53 if (col >= 0x21 && col <= 0x7e)
54 col -= 0x21;
55 else
56 return 0x0000;
57
58 val = __jisx0213_to_ucs_main[row * 94 + col];
59 val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff);
60 if (val == 0xfffd)
61 val = 0x0000;
62 return val;
63}
64
65static inline uint16_t
66__attribute ((always_inline))
67ucs4_to_jisx0213 (uint32_t ucs)
68{
69 if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6)
70 {
71 int index1 = __jisx0213_from_ucs_level1[ucs >> 6];
72 if (index1 >= 0)
73 return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)];
74 }
75 return 0x0000;
76}
77
78static inline int
79__attribute ((always_inline))
80jisx0213_added_in_2004_p (uint16_t val)
81{
82 /* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to
83 plane 1, and plane 2 was left unchanged. See ISO-IR-233. */
84 switch (val >> 8)
85 {
86 case 0x2e:
87 return val == 0x2e21;
88 case 0x2f:
89 return val == 0x2f7e;
90 case 0x4f:
91 return val == 0x4f54 || val == 0x4f7e;
92 case 0x74:
93 return val == 0x7427;
94 case 0x7e:
95 return val >= 0x7e7a && val <= 0x7e7e;
96 default:
97 return 0;
98 }
99}
100
101#endif /* _JISX0213_H */
102