lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Functions for JISX0213 conversion. |
| 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Bruno Haible <bruno@clisp.org>, 2002. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef _JISX0213_H |
| 21 | #define _JISX0213_H 1 |
| 22 | |
| 23 | #include <stdint.h> |
| 24 | |
| 25 | extern const uint16_t __jisx0213_to_ucs_combining[][2]; |
| 26 | extern const uint16_t __jisx0213_to_ucs_main[120 * 94]; |
| 27 | extern const uint32_t __jisx0213_to_ucs_pagestart[]; |
| 28 | extern const int16_t __jisx0213_from_ucs_level1[2715]; |
| 29 | extern const uint16_t __jisx0213_from_ucs_level2[]; |
| 30 | |
| 31 | #define NELEMS(arr) (sizeof (arr) / sizeof (arr[0])) |
| 32 | |
| 33 | static inline uint32_t |
| 34 | __attribute ((always_inline)) |
| 35 | jisx0213_to_ucs4 (unsigned int row, unsigned int col) |
| 36 | { |
| 37 | uint32_t val; |
| 38 | |
| 39 | if (row >= 0x121 && row <= 0x17e) |
| 40 | row -= 289; |
| 41 | else if (row == 0x221) |
| 42 | row -= 451; |
| 43 | else if (row >= 0x223 && row <= 0x225) |
| 44 | row -= 452; |
| 45 | else if (row == 0x228) |
| 46 | row -= 454; |
| 47 | else if (row >= 0x22c && row <= 0x22f) |
| 48 | row -= 457; |
| 49 | else if (row >= 0x26e && row <= 0x27e) |
| 50 | row -= 519; |
| 51 | else |
| 52 | return 0x0000; |
| 53 | |
| 54 | if (col >= 0x21 && col <= 0x7e) |
| 55 | col -= 0x21; |
| 56 | else |
| 57 | return 0x0000; |
| 58 | |
| 59 | val = __jisx0213_to_ucs_main[row * 94 + col]; |
| 60 | val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff); |
| 61 | if (val == 0xfffd) |
| 62 | val = 0x0000; |
| 63 | return val; |
| 64 | } |
| 65 | |
| 66 | static inline uint16_t |
| 67 | __attribute ((always_inline)) |
| 68 | ucs4_to_jisx0213 (uint32_t ucs) |
| 69 | { |
| 70 | if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6) |
| 71 | { |
| 72 | int index1 = __jisx0213_from_ucs_level1[ucs >> 6]; |
| 73 | if (index1 >= 0) |
| 74 | return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)]; |
| 75 | } |
| 76 | return 0x0000; |
| 77 | } |
| 78 | |
| 79 | static inline int |
| 80 | __attribute ((always_inline)) |
| 81 | jisx0213_added_in_2004_p (uint16_t val) |
| 82 | { |
| 83 | /* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to |
| 84 | plane 1, and plane 2 was left unchanged. See ISO-IR-233. */ |
| 85 | switch (val >> 8) |
| 86 | { |
| 87 | case 0x2e: |
| 88 | return val == 0x2e21; |
| 89 | case 0x2f: |
| 90 | return val == 0x2f7e; |
| 91 | case 0x4f: |
| 92 | return val == 0x4f54 || val == 0x4f7e; |
| 93 | case 0x74: |
| 94 | return val == 0x7427; |
| 95 | case 0x7e: |
| 96 | return val >= 0x7e7a && val <= 0x7e7e; |
| 97 | default: |
| 98 | return 0; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | #endif /* _JISX0213_H */ |