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93a568aa | 1 | /* Functions for JISX0213 conversion. |
6d7e8eda | 2 | Copyright (C) 2002-2023 Free Software Foundation, Inc. |
93a568aa | 3 | This file is part of the GNU C Library. |
93a568aa UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
93a568aa UD |
18 | |
19 | #ifndef _JISX0213_H | |
20 | #define _JISX0213_H 1 | |
21 | ||
22 | #include <stdint.h> | |
23 | ||
24 | extern const uint16_t __jisx0213_to_ucs_combining[][2]; | |
25 | extern const uint16_t __jisx0213_to_ucs_main[120 * 94]; | |
26 | extern const uint32_t __jisx0213_to_ucs_pagestart[]; | |
27 | extern const int16_t __jisx0213_from_ucs_level1[2715]; | |
28 | extern const uint16_t __jisx0213_from_ucs_level2[]; | |
29 | ||
30 | #define NELEMS(arr) (sizeof (arr) / sizeof (arr[0])) | |
31 | ||
32 | static inline uint32_t | |
dd9423a6 | 33 | __attribute ((always_inline)) |
93a568aa UD |
34 | jisx0213_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 | ||
65 | static inline uint16_t | |
dd9423a6 | 66 | __attribute ((always_inline)) |
93a568aa UD |
67 | ucs4_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 | ||
5d32be9a UD |
78 | static inline int |
79 | __attribute ((always_inline)) | |
80 | jisx0213_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: | |
9e365fe7 | 91 | return val == 0x4f54 || val == 0x4f7e; |
5d32be9a UD |
92 | case 0x74: |
93 | return val == 0x7427; | |
94 | case 0x7e: | |
95 | return val >= 0x7e7a && val <= 0x7e7e; | |
96 | default: | |
97 | return 0; | |
98 | } | |
99 | } | |
100 | ||
93a568aa | 101 | #endif /* _JISX0213_H */ |