1 /* Access functions for JISX0208 conversion.
2 Copyright (C) 1997-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.
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.
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 <https://www.gnu.org/licenses/>. */
26 /* Struct for table with indeces in UCS mapping table. */
27 struct jisx0208_ucs_idx
35 /* Conversion table. */
36 extern const uint16_t __jis0208_to_ucs
[];
38 #define JIS0208_LAT1_MIN 0xa2
39 #define JIS0208_LAT1_MAX 0xf7
40 extern const char __jisx0208_from_ucs4_lat1
[JIS0208_LAT1_MAX
+ 1
41 - JIS0208_LAT1_MIN
][2];
42 extern const char __jisx0208_from_ucs4_greek
[0xc1][2];
43 extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx
[];
44 extern const char __jisx0208_from_ucs_tab
[][2];
47 static inline uint32_t
48 __attribute ((always_inline
))
49 jisx0208_to_ucs4 (const unsigned char **s
, size_t avail
, unsigned char offset
)
51 unsigned char ch
= *(*s
);
55 if (ch
< offset
|| (ch
- offset
) <= 0x20)
56 return __UNKNOWN_10646_CHAR
;
62 if (ch2
< offset
|| (ch2
- offset
) <= 0x20 || (ch2
- offset
) >= 0x7f)
63 return __UNKNOWN_10646_CHAR
;
65 idx
= (ch
- 0x21 - offset
) * 94 + (ch2
- 0x21 - offset
);
67 return __UNKNOWN_10646_CHAR
;
71 return __jis0208_to_ucs
[idx
] ?: ((*s
) -= 2, __UNKNOWN_10646_CHAR
);
76 __attribute ((always_inline
))
77 ucs4_to_jisx0208 (uint32_t wch
, unsigned char *s
, size_t avail
)
79 unsigned int ch
= (unsigned int) wch
;
85 if (ch
>= JIS0208_LAT1_MIN
&& ch
<= JIS0208_LAT1_MAX
)
86 cp
= __jisx0208_from_ucs4_lat1
[ch
- JIS0208_LAT1_MIN
];
87 else if (ch
>= 0x391 && ch
<= 0x451)
88 cp
= __jisx0208_from_ucs4_greek
[ch
- 0x391];
91 const struct jisx0208_ucs_idx
*rp
= __jisx0208_from_ucs_idx
;
94 return __UNKNOWN_10646_CHAR
;
98 cp
= __jisx0208_from_ucs_tab
[rp
->idx
+ ch
- rp
->start
];
100 return __UNKNOWN_10646_CHAR
;
104 return __UNKNOWN_10646_CHAR
;
112 #endif /* jis0208.h */