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| Rev | Author | Line No. | Line |
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| 4921 | Serge | 1 | /* Routine to translate from Japanese characters to Unicode */ |
| 2 | |||
| 3 | /* Copyright (c) 2002 Red Hat Incorporated. |
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| 4 | All rights reserved. |
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| 5 | |||
| 6 | Redistribution and use in source and binary forms, with or without |
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| 7 | modification, are permitted provided that the following conditions are met: |
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| 8 | |||
| 9 | Redistributions of source code must retain the above copyright |
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| 10 | notice, this list of conditions and the following disclaimer. |
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| 11 | |||
| 12 | Redistributions in binary form must reproduce the above copyright |
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| 13 | notice, this list of conditions and the following disclaimer in the |
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| 14 | documentation and/or other materials provided with the distribution. |
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| 15 | |||
| 16 | The name of Red Hat Incorporated may not be used to endorse |
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| 17 | or promote products derived from this software without specific |
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| 18 | prior written permission. |
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| 19 | |||
| 20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 21 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | ARE DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY |
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| 24 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 25 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 26 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 27 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 28 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 29 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 30 | */ |
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| 31 | |||
| 32 | #include |
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| 33 | |||
| 34 | #ifdef _MB_CAPABLE |
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| 35 | /* Under Cygwin, the incoming wide character is already given in UTF due |
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| 36 | to the requirements of the underlying OS. */ |
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| 37 | #ifndef __CYGWIN__ |
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| 38 | |||
| 39 | #include <_ansi.h> |
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| 40 | #include |
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| 41 | #include "local.h" |
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| 42 | #include "jp2uc.h" |
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| 43 | |||
| 44 | /* Japanese encoding types supported */ |
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| 45 | #define JP_JIS 1 |
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| 46 | #define JP_SJIS 2 |
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| 47 | #define JP_EUCJP 3 |
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| 48 | |||
| 49 | static wint_t |
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| 50 | _DEFUN (__jp2uc, (c, type), wint_t c _AND int type) |
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| 51 | { |
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| 52 | int index, adj; |
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| 53 | unsigned char byte1, byte2; |
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| 54 | wint_t ret; |
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| 55 | |||
| 56 | /* we actually use tables of EUCJP to Unicode. For JIS, we simply |
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| 57 | note that EUCJP is essentially JIS with the top bits on in each |
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| 58 | byte and translate to EUCJP. For SJIS, we do a translation to EUCJP before |
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| 59 | accessing the tables. */ |
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| 60 | switch (type) |
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| 61 | { |
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| 62 | case JP_JIS: |
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| 63 | byte1 = (c >> 8) + 0x80; |
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| 64 | byte2 = (c & 0xff) + 0x80; |
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| 65 | break; |
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| 66 | case JP_EUCJP: |
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| 67 | byte1 = (c >> 8); |
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| 68 | byte2 = (c & 0xff); |
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| 69 | break; |
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| 70 | case JP_SJIS: |
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| 71 | byte1 = c >> 8; |
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| 72 | byte2 = c & 0xff; |
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| 73 | if (byte2 <= 0x9e) |
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| 74 | { |
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| 75 | adj = 0xa1 - 0x22; |
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| 76 | byte2 = (byte2 - 31) + 0xa1; |
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| 77 | } |
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| 78 | else |
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| 79 | { |
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| 80 | adj = 0xa1 - 0x21; |
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| 81 | byte2 = (byte2 - 126) + 0xa1; |
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| 82 | } |
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| 83 | if (byte1 <= 0x9f) |
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| 84 | byte1 = ((byte1 - 112) << 1) + adj; |
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| 85 | else |
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| 86 | byte1 = ((byte1 - 176) << 1) + adj; |
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| 87 | break; |
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| 88 | default: |
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| 89 | return WEOF; |
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| 90 | } |
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| 91 | |||
| 92 | /* find conversion in jp2uc arrays */ |
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| 93 | |||
| 94 | /* handle larger ranges first */ |
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| 95 | if (byte1 >= 0xb0 && byte1 <= 0xcf && c <= 0xcfd3) |
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| 96 | { |
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| 97 | index = (byte1 - 0xb0) * 0xfe + (byte2 - 0xa1); |
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| 98 | return b02cf[index]; |
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| 99 | } |
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| 100 | else if (byte1 >= 0xd0 && byte1 <= 0xf4 && c <= 0xf4a6) |
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| 101 | { |
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| 102 | index = (byte1 - 0xd0) * 0xfe + (byte2 - 0xa1); |
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| 103 | return d02f4[index]; |
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| 104 | } |
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| 105 | |||
| 106 | /* handle smaller ranges here */ |
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| 107 | switch (byte1) |
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| 108 | { |
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| 109 | case 0xA1: |
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| 110 | return (wint_t)a1[byte2 - 0xa1]; |
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| 111 | case 0xA2: |
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| 112 | ret = a2[byte2 - 0xa1]; |
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| 113 | if (ret != 0) |
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| 114 | return (wint_t)ret; |
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| 115 | break; |
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| 116 | case 0xA3: |
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| 117 | if (a3[byte2 - 0xa1]) |
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| 118 | return (wint_t)(0xff00 + (byte2 - 0xa0)); |
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| 119 | break; |
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| 120 | case 0xA4: |
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| 121 | if (byte2 <= 0xf3) |
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| 122 | return (wint_t)(0x3000 + (byte2 - 0x60)); |
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| 123 | break; |
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| 124 | case 0xA5: |
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| 125 | if (byte2 <= 0xf6) |
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| 126 | return (wint_t)(0x3000 + byte2); |
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| 127 | break; |
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| 128 | case 0xA6: |
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| 129 | ret = 0; |
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| 130 | if (byte2 <= 0xd8) |
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| 131 | ret = (wint_t)a6[byte2 - 0xa1]; |
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| 132 | if (ret != 0) |
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| 133 | return ret; |
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| 134 | break; |
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| 135 | case 0xA7: |
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| 136 | ret = 0; |
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| 137 | if (byte2 <= 0xf1) |
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| 138 | ret = (wint_t)a7[byte2 - 0xa1]; |
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| 139 | if (ret != 0) |
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| 140 | return ret; |
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| 141 | break; |
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| 142 | case 0xA8: |
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| 143 | if (byte2 <= 0xc0) |
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| 144 | return (wint_t)a8[byte2 - 0xa1]; |
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| 145 | break; |
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| 146 | default: |
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| 147 | return WEOF; |
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| 148 | } |
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| 149 | |||
| 150 | return WEOF; |
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| 151 | } |
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| 152 | |||
| 153 | wint_t |
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| 154 | _DEFUN (_jp2uc, (c), wint_t c) |
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| 155 | { |
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| 156 | if (!strcmp (__locale_charset (), "JIS")) |
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| 157 | c = __jp2uc (c, JP_JIS); |
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| 158 | else if (!strcmp (__locale_charset (), "SJIS")) |
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| 159 | c = __jp2uc (c, JP_SJIS); |
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| 160 | else if (!strcmp (__locale_charset (), "EUCJP")) |
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| 161 | c = __jp2uc (c, JP_EUCJP); |
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| 162 | return c; |
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| 163 | } |
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| 164 | |||
| 165 | #endif /* !__CYGWIN__ */ |
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| 166 | #endif /* _MB_CAPABLE */ |