Use binutils 2.41 branch in build-many-glibcs.py
[glibc.git] / iconvdata / jis0212.h
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1 /* Access functions for JISX0212 conversion.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
19 #ifndef _JIS0212_H
20 #define _JIS0212_H 1
22 #include <assert.h>
23 #include <gconv.h>
24 #include <stdint.h>
27 /* Struct for table with indices in mapping table. */
28 struct jisx0212_idx
30 uint16_t start;
31 uint16_t end;
32 uint16_t idx;
35 /* Conversion table. */
36 extern const struct jisx0212_idx __jisx0212_to_ucs_idx[];
37 extern const uint16_t __jisx0212_to_ucs[];
39 extern const struct jisx0212_idx __jisx0212_from_ucs_idx[];
40 extern const char __jisx0212_from_ucs[][2];
43 static inline uint32_t
44 __attribute ((always_inline))
45 jisx0212_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
47 const struct jisx0212_idx *rp = __jisx0212_to_ucs_idx;
48 unsigned char ch = *(*s);
49 unsigned char ch2;
50 uint32_t wch = 0;
51 int idx;
53 if (ch < offset || (ch - offset) < 0x22 || (ch - offset) > 0x6d)
54 return __UNKNOWN_10646_CHAR;
56 if (avail < 2)
57 return 0;
59 ch2 = (*s)[1];
60 if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
61 return __UNKNOWN_10646_CHAR;
63 idx = (ch - offset - 0x21) * 94 + (ch2 - offset - 0x21);
65 while (idx > rp->end)
66 ++rp;
67 if (idx >= rp->start)
68 wch = __jisx0212_to_ucs[rp->idx + idx - rp->start];
70 if (wch != L'\0')
71 (*s) += 2;
72 else
73 wch = __UNKNOWN_10646_CHAR;
75 return wch;
79 static inline size_t
80 __attribute ((always_inline))
81 ucs4_to_jisx0212 (uint32_t wch, unsigned char *s, size_t avail)
83 const struct jisx0212_idx *rp = __jisx0212_from_ucs_idx;
84 unsigned int ch = (unsigned int) wch;
85 const char *cp;
87 if (ch >= 0xffff)
88 return __UNKNOWN_10646_CHAR;
89 while (ch > rp->end)
90 ++rp;
91 if (ch >= rp->start)
92 cp = __jisx0212_from_ucs[rp->idx + ch - rp->start];
93 else
94 return __UNKNOWN_10646_CHAR;
96 if (cp[0] == '\0')
97 return __UNKNOWN_10646_CHAR;
99 s[0] = cp[0];
100 assert (cp[1] != '\0');
101 if (avail < 2)
102 return 0;
104 s[1] = cp[1];
105 return 2;
108 #endif /* jis0212.h */