projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04be94a8 UD |
1 | /* Access functions for JISX0212 conversion. |
| 2 | Copyright (C) 1997 Free Software Foundation, Inc. | |
| 3 | This file is part of the GNU C Library. | |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Library General Public License as | |
| 8 | published by the Free Software Foundation; either version 2 of the | |
| 9 | 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 | Library General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Library General Public | |
| 17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 | Boston, MA 02111-1307, USA. */ | |
| 20 | ||
| 21 | #ifndef _JIS0212_H | |
| 22 | #define _JIS0212_H 1 | |
| 23 | ||
| 24 | #include <gconv.h> | |
| 25 | #include <inttypes.h> | |
| 26 | ||
| 27 | ||
| 28 | /* Struct for table with indeces in mapping table. */ | |
| 29 | struct jisx0212_idx | |
| 30 | { | |
| 31 | uint16_t start; | |
| 32 | uint16_t end; | |
| 33 | uint16_t idx; | |
| 34 | }; | |
| 35 | ||
| 36 | /* Conversion table. */ | |
| 37 | extern const struct jisx0212_idx jisx0212_to_ucs_idx[]; | |
| 38 | extern const uint16_t jisx0212_to_ucs[]; | |
| 39 | ||
| 40 | extern const struct jisx0212_idx jisx0212_from_ucs_idx[]; | |
| 41 | extern const char jisx0212_from_ucs[][2]; | |
| 42 | ||
| 43 | ||
| 44 | static inline wchar_t | |
| 45 | jisx0212_to_ucs4 (char **s, size_t avail) | |
| 46 | { | |
| 47 | const struct jisx0212_idx *rp = jisx0212_to_ucs_idx; | |
| 48 | unsigned char ch = *(*s); | |
| 49 | unsigned char ch2; | |
| 50 | wchar_t wch = L'\0'; | |
| 51 | int idx; | |
| 52 | ||
| 53 | if (ch <= 0x6d || ch > 0xea) | |
| 54 | return UNKNOWN_10646_CHAR; | |
| 55 | ||
| 56 | if (avail < 2) | |
| 57 | return 0; | |
| 58 | ||
| 59 | ch2 = (*s)[1]; | |
| 60 | if (ch2 <= 0x20 || ch2 >= 0x7f) | |
| 61 | return UNKNOWN_10646_CHAR; | |
| 62 | ||
| 63 | idx = (ch - 0x21) * 94 + (ch2 - 0x21); | |
| 64 | ||
| 65 | while (idx < rp->start) | |
| 66 | ++rp; | |
| 67 | if (idx <= rp->end) | |
| 68 | wch = jisx0212_to_ucs[rp->idx + idx - rp->start]; | |
| 69 | ||
| 70 | if (wch != L'\0') | |
| 71 | (*s) += 2; | |
| 72 | else | |
| 73 | wch = UNKNOWN_10646_CHAR; | |
| 74 | ||
| 75 | return wch; | |
| 76 | } | |
| 77 | ||
| 78 | ||
| 79 | static inline size_t | |
| 80 | ucs4_to_jisx0212 (wchar_t wch, char **s, size_t avail) | |
| 81 | { | |
| 82 | const struct jisx0212_idx *rp = jisx0212_from_ucs_idx; | |
| 83 | unsigned int ch = (unsigned int) wch; | |
| 84 | const char *cp = NULL; | |
| 85 | ||
| 86 | while (ch > rp->end) | |
| 87 | ++rp; | |
| 88 | if (ch >= rp->start) | |
| 89 | cp = jisx0212_from_ucs[rp->idx + ch - rp->start]; | |
| 90 | ||
| 91 | if (cp == NULL || cp[0] == '\0') | |
| 92 | return UNKNOWN_10646_CHAR; | |
| 93 | ||
| 94 | **s = cp[0]; | |
| 95 | if (cp[1] != '\0') | |
| 96 | { | |
| 97 | if (avail < 2) | |
| 98 | return 0; | |
| 99 | ||
| 100 | *++(*s) = cp[1]; | |
| 101 | } | |
| 102 | ++(*s); | |
| 103 | ||
| 104 | return 2; | |
| 105 | } | |
| 106 | ||
| 107 | #endif /* jis0212.h */ |