[444] | 1 | /* |
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| 2 | * Copyright (c) 2003-2004, Artem B. Bityuckiy |
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| 3 | * Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * |
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 24 | * SUCH DAMAGE. |
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| 25 | */ |
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| 26 | #include "cesbi.h" |
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| 27 | |
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| 28 | #if defined (ICONV_TO_UCS_CES_UCS_2) \ |
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| 29 | || defined (ICONV_FROM_UCS_CES_UCS_2) |
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| 30 | |
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| 31 | #include <_ansi.h> |
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| 32 | #include <reent.h> |
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| 33 | #include <stdlib.h> |
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| 34 | #include <string.h> |
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| 35 | #include <sys/types.h> |
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| 36 | #include "../lib/local.h" |
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| 37 | #include "../lib/ucsconv.h" |
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| 38 | #include "../lib/endian.h" |
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| 39 | |
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| 40 | /* |
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| 41 | * BOM isn't supported. UCS-2 is Big Endian. Bad codes are rejected. |
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| 42 | * Bad codes: 0xFFFF, 0xFFFE, 0xD800-0xDFFF. |
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| 43 | */ |
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| 44 | |
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| 45 | #define UCS_2_BIG_ENDIAN 0 |
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| 46 | #define UCS_2_LITTLE_ENDIAN 1 |
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| 47 | |
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| 48 | #define UCS_2 "ucs_2" |
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| 49 | #define UCS_2BE "ucs_2be" |
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| 50 | #define UCS_2LE "ucs_2le" |
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| 51 | |
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| 52 | static void * |
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| 53 | ucs_2_init (struct _reent *rptr, |
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| 54 | const char *encoding) |
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| 55 | { |
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| 56 | int *data; |
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| 57 | |
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| 58 | if ((data = (int *) _malloc_r(rptr, sizeof (int))) == NULL) |
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| 59 | return (void *)NULL; |
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| 60 | |
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| 61 | if (strcmp (encoding, UCS_2LE) == 0) |
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| 62 | *data = UCS_2_LITTLE_ENDIAN; |
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| 63 | else |
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| 64 | *data = UCS_2_BIG_ENDIAN; |
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| 65 | |
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| 66 | return (void *)data; |
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| 67 | } |
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| 68 | |
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| 69 | static size_t |
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| 70 | ucs_2_close (struct _reent *rptr, |
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| 71 | void *data) |
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| 72 | { |
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| 73 | _free_r (rptr, data); |
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| 74 | return 0; |
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| 75 | } |
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| 76 | |
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| 77 | #if defined (ICONV_FROM_UCS_CES_UCS_2) |
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| 78 | static size_t |
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| 79 | ucs_2_convert_from_ucs (void *data, |
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| 80 | ucs4_t in, |
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| 81 | unsigned char **outbuf, |
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| 82 | size_t *outbytesleft) |
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| 83 | { |
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| 84 | if ((in >= 0x0000D800 && in <= 0x0000DFFF) /* Surrogate character */ |
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| 85 | || in >= 0x0000FFFE) |
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| 86 | return (size_t)ICONV_CES_INVALID_CHARACTER; |
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| 87 | |
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| 88 | if (*outbytesleft < sizeof (ucs2_t)) |
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| 89 | return (size_t)ICONV_CES_NOSPACE; |
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| 90 | |
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| 91 | if (*((int *)data) == UCS_2_BIG_ENDIAN) |
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| 92 | *((ucs2_t *)(*outbuf)) = ICONV_HTOBES ((ucs2_t)in); |
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| 93 | else |
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| 94 | *((ucs2_t *)(*outbuf)) = ICONV_HTOLES ((ucs2_t)in); |
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| 95 | |
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| 96 | *outbuf += sizeof (ucs2_t); |
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| 97 | *outbytesleft -= sizeof (ucs2_t); |
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| 98 | |
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| 99 | return sizeof (ucs2_t); |
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| 100 | } |
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| 101 | #endif /* ICONV_FROM_UCS_CES_UCS_2 */ |
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| 102 | |
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| 103 | #if defined (ICONV_TO_UCS_CES_UCS_2) |
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| 104 | static ucs4_t |
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| 105 | ucs_2_convert_to_ucs (void *data, |
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| 106 | const unsigned char **inbuf, |
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| 107 | size_t *inbytesleft) |
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| 108 | { |
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| 109 | ucs4_t res; |
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| 110 | |
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| 111 | if (*inbytesleft < sizeof (ucs2_t)) |
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| 112 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 113 | |
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| 114 | if (*((int *)data) == UCS_2_BIG_ENDIAN) |
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| 115 | res = (ucs4_t)ICONV_BETOHS (*((ucs2_t *)(*inbuf))); |
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| 116 | else |
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| 117 | res = (ucs4_t)ICONV_LETOHS (*((ucs2_t *)(*inbuf))); |
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| 118 | |
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| 119 | if ((res >= 0x0000D800 && res <= 0x0000DFFF) /* Surrogate character */ |
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| 120 | || res >= 0x0000FFFE) |
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| 121 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 122 | |
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| 123 | *inbytesleft -= sizeof (ucs2_t); |
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| 124 | *inbuf += sizeof (ucs2_t); |
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| 125 | |
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| 126 | return res; |
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| 127 | } |
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| 128 | #endif /* ICONV_TO_UCS_CES_UCS_2 */ |
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| 129 | |
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| 130 | static int |
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| 131 | ucs_2_get_mb_cur_max (void *data) |
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| 132 | { |
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| 133 | return 2; |
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| 134 | } |
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| 135 | |
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| 136 | #if defined (ICONV_TO_UCS_CES_UCS_2) |
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| 137 | const iconv_to_ucs_ces_handlers_t |
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| 138 | _iconv_to_ucs_ces_handlers_ucs_2 = |
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| 139 | { |
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| 140 | ucs_2_init, |
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| 141 | ucs_2_close, |
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| 142 | ucs_2_get_mb_cur_max, |
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| 143 | NULL, |
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| 144 | NULL, |
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| 145 | NULL, |
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| 146 | ucs_2_convert_to_ucs |
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| 147 | }; |
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| 148 | #endif |
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| 149 | |
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| 150 | #if defined (ICONV_FROM_UCS_CES_UCS_2) |
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| 151 | const iconv_from_ucs_ces_handlers_t |
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| 152 | _iconv_from_ucs_ces_handlers_ucs_2 = |
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| 153 | { |
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| 154 | ucs_2_init, |
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| 155 | ucs_2_close, |
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| 156 | ucs_2_get_mb_cur_max, |
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| 157 | NULL, |
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| 158 | NULL, |
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| 159 | NULL, |
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| 160 | ucs_2_convert_from_ucs |
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| 161 | }; |
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| 162 | #endif |
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| 163 | |
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| 164 | #endif /* ICONV_TO_UCS_CES_UCS_2 || ICONV_FROM_UCS_CES_UCS_2 */ |
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| 165 | |
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