.
[glibc/history.git] / iconvdata / cns11643l2.h
blobbdb32dde71b98719c0901efac7a62a561ceb4925
1 /* Access functions for CNS 11643, plane 2 handling.
2 Copyright (C) 1998, 1999, 2001, 2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #include <stdint.h>
22 #include <gconv.h>
24 /* Table for CNS 11643, plane 2 to UCS4 conversion. */
25 extern const uint16_t __cns11643l2_to_ucs4_tab[];
28 static inline uint32_t
29 __attribute ((always_inline))
30 cns11643l2_to_ucs4 (const unsigned char **s, size_t avail,
31 unsigned char offset)
33 unsigned char ch = *(*s);
34 unsigned char ch2;
35 int idx;
37 if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d)
38 return __UNKNOWN_10646_CHAR;
40 if (avail < 2)
41 return 0;
43 ch2 = (*s)[1];
44 if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
45 return __UNKNOWN_10646_CHAR;
47 idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
48 if (idx > 0x1de1)
49 return __UNKNOWN_10646_CHAR;
51 (*s) += 2;
53 return __cns11643l2_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
57 /* The table which contains the CNS 11643 level 2 mappings. */
58 extern const char __cns11643_from_ucs4p0_tab[][3];
61 static inline size_t
62 __attribute ((always_inline))
63 ucs4_to_cns11643l2 (uint32_t wch, unsigned char *s, size_t avail)
65 unsigned int ch = (unsigned int) wch;
66 const char *cp = NULL;
68 if (ch >= 0x4e07 && ch <= 0x9fa4)
70 cp = __cns11643_from_ucs4p0_tab[ch - 0x3400];
71 if (cp[0] == '\2')
72 ++cp;
73 else
74 cp = NULL;
77 if (cp == NULL)
78 return __UNKNOWN_10646_CHAR;
80 if (avail < 2)
81 return 0;
83 s[0] = cp[0];
84 s[1] = cp[1];
86 return 2;