1 /* Tables for conversion to and from ISO-IR-165.
2 converting from UCS using gaps.
3 Copyright (C) 2000-2015 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
22 #define _ISO_IR_165_H 1
34 /* Table for ISO-IR-165 (CCITT Chinese) to UCS4 conversion. */
35 #define ISOIR165_FROMSIZE 0x2284
36 extern const uint16_t __isoir165_to_tab[ISOIR165_FROMSIZE];
39 /* XXX If we at some point need an offset value to decode the byte
40 sequences another parameter can be added. */
41 static inline uint32_t
42 __attribute ((always_inline))
43 isoir165_to_ucs4 (const unsigned char **s, size_t avail)
45 unsigned char ch = *(*s);
49 if (ch <= 0x20 || ch >= 0x7f)
50 return __UNKNOWN_10646_CHAR;
56 if (ch2 <= 0x20 || ch2 >= 0x7f)
57 return __UNKNOWN_10646_CHAR;
59 res = __isoir165_to_tab[(ch - 0x21) * 94 + (ch2 - 0x21)];
61 return __UNKNOWN_10646_CHAR;
68 /* Tables for ISO-IR-165 (CCITT Chinese) from UCS4 conversion. */
69 extern const struct gap __isoir165_from_idx[];
70 extern const char __isoir165_from_tab[];
73 __attribute ((always_inline))
74 ucs4_to_isoir165 (uint32_t wch, unsigned char *s, size_t avail)
76 unsigned int ch = (unsigned int) wch;
78 const struct gap *rp = __isoir165_from_idx;
81 /* This is an illegal character. */
82 return __UNKNOWN_10646_CHAR;
87 /* This is an illegal character. */
88 return __UNKNOWN_10646_CHAR;
90 /* The two bytes following the index given in this record give the
91 encoding in ISO-IR-165. Unless the bytes are zero. */
92 cp = &__isoir165_from_tab[(ch + rp->idx) * 2];
94 /* This is an illegal character. */
95 return __UNKNOWN_10646_CHAR;
106 #endif /* iso-ir-165.h */