[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_UTF_8) \ |
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| 29 | || defined (ICONV_FROM_UCS_CES_UTF_8) |
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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 <sys/types.h> |
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| 34 | #include "../lib/local.h" |
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| 35 | #include "../lib/ucsconv.h" |
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| 36 | |
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| 37 | #define UTF8_MB_CUR_MAX 6 |
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| 38 | |
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| 39 | /* |
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| 40 | * UTF-8 CES converter doesn't interpret BOM. Reject overlong sequences, |
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| 41 | * U'FFFF, U'FFFE codes, UTF-16 surrogate codes and all codes > 0x7FFFFFFF. |
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| 42 | */ |
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| 43 | |
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| 44 | #if defined (ICONV_FROM_UCS_CES_UTF_8) |
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| 45 | static size_t |
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| 46 | convert_from_ucs (void *data, |
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| 47 | register ucs4_t in, |
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| 48 | unsigned char **outbuf, |
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| 49 | size_t *outbytesleft) |
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| 50 | { |
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| 51 | register unsigned char *cp; |
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| 52 | register size_t bytes; |
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| 53 | |
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| 54 | if ((in >= 0x0000D800 && in <= 0x0000DFFF) |
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| 55 | || in > 0x7FFFFFFF || in == 0x0000FFFF || in == 0x0000FFFE) |
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| 56 | return (size_t)ICONV_CES_INVALID_CHARACTER; |
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| 57 | |
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| 58 | if (in < 0x80) |
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| 59 | bytes = 1; |
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| 60 | else if (in < 0x800) |
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| 61 | bytes = 2; |
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| 62 | else if (in < 0x10000) |
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| 63 | bytes = 3; |
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| 64 | else if (in < 0x200000) |
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| 65 | bytes = 4; |
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| 66 | else if (in < 0x4000000) |
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| 67 | bytes = 5; |
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| 68 | else |
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| 69 | bytes = 6; |
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| 70 | |
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| 71 | if (*outbytesleft < bytes) |
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| 72 | return (size_t)ICONV_CES_NOSPACE; |
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| 73 | |
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| 74 | cp = *outbuf; |
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| 75 | |
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| 76 | switch (bytes) |
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| 77 | { |
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| 78 | case 1: |
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| 79 | *cp = (unsigned char)in; |
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| 80 | break; |
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| 81 | |
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| 82 | case 2: |
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| 83 | *cp++ = (unsigned char)((in >> 6) | 0x000000C0); |
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| 84 | *cp++ = (unsigned char)((in & 0x0000003F) | 0x00000080); |
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| 85 | break; |
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| 86 | |
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| 87 | case 3: |
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| 88 | *cp++ = (unsigned char)((in >> 12) | 0x000000E0); |
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| 89 | *cp++ = (unsigned char)(((in >> 6) & 0x0000003F) | 0x00000080); |
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| 90 | *cp++ = (unsigned char)((in & 0x0000003F) | 0x00000080); |
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| 91 | break; |
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| 92 | |
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| 93 | case 4: |
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| 94 | *cp++ = (unsigned char)((in >> 18) | 0x000000F0); |
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| 95 | *cp++ = (unsigned char)(((in >> 12) & 0x0000003F) | 0x00000080); |
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| 96 | *cp++ = (unsigned char)(((in >> 6) & 0x0000003F) | 0x00000080); |
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| 97 | *cp++ = (unsigned char)((in & 0x0000003F) | 0x00000080); |
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| 98 | break; |
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| 99 | |
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| 100 | case 5: |
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| 101 | *cp++ = (unsigned char)((in >> 24) | 0x000000F8); |
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| 102 | *cp++ = (unsigned char)(((in >> 18) & 0x0000003F) | 0x00000080); |
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| 103 | *cp++ = (unsigned char)(((in >> 12) & 0x0000003F) | 0x00000080); |
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| 104 | *cp++ = (unsigned char)(((in >> 6) & 0x0000003F) | 0x00000080); |
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| 105 | *cp++ = (unsigned char)((in & 0x0000003F) | 0x00000080); |
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| 106 | break; |
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| 107 | |
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| 108 | case 6: |
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| 109 | *cp++ = (unsigned char)((in >> 30) | 0x000000FC); |
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| 110 | *cp++ = (unsigned char)(((in >> 24) & 0x0000003F) | 0x00000080); |
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| 111 | *cp++ = (unsigned char)(((in >> 18) & 0x0000003F) | 0x00000080); |
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| 112 | *cp++ = (unsigned char)(((in >> 12) & 0x0000003F) | 0x00000080); |
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| 113 | *cp++ = (unsigned char)(((in >> 6) & 0x0000003F) | 0x00000080); |
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| 114 | *cp++ = (unsigned char)((in & 0x0000003F) | 0x00000080); |
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| 115 | break; |
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| 116 | } |
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| 117 | |
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| 118 | *outbytesleft -= bytes; |
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| 119 | *outbuf += bytes; |
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| 120 | |
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| 121 | return bytes; |
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| 122 | } |
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| 123 | #endif /* ICONV_FROM_UCS_CES_UTF_8 */ |
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| 124 | |
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| 125 | #if defined (ICONV_TO_UCS_CES_UTF_8) |
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| 126 | static ucs4_t |
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| 127 | convert_to_ucs (void *data, |
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| 128 | const unsigned char **inbuf, |
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| 129 | size_t *inbytesleft) |
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| 130 | { |
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| 131 | register const unsigned char *in = *inbuf; |
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| 132 | register size_t bytes; |
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| 133 | ucs4_t res; |
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| 134 | |
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| 135 | if (in[0] >= 0xC0) |
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| 136 | { |
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| 137 | if (in[0] < 0xE0) |
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| 138 | { |
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| 139 | if (*inbytesleft < (bytes = 2)) |
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| 140 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 141 | |
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| 142 | if ( ((in[0] & ~0x1F) == 0xC0) |
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| 143 | && ((in[1] & 0xC0) == 0x80)) |
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| 144 | res = ((ucs4_t)(in[0] & 0x1F) << 6) |
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| 145 | | ((ucs4_t)(in[1] & 0x3F)); |
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| 146 | else |
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| 147 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 148 | |
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| 149 | if (res < 0x00000080) /* Overlong sequence */ |
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| 150 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 151 | } |
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| 152 | |
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| 153 | else if (in[0] < 0xF0) |
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| 154 | { |
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| 155 | if (*inbytesleft < (bytes = 3)) |
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| 156 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 157 | |
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| 158 | if ( ((in[0] & ~0x0F) == 0xE0) |
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| 159 | && ((in[1] & 0xC0) == 0x80) |
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| 160 | && ((in[2] & 0xC0) == 0x80)) |
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| 161 | res = ((ucs4_t)(in[0] & 0x0F) << 12) |
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| 162 | | ((ucs4_t)(in[1] & 0x3F) << 6) |
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| 163 | | ((ucs4_t)(in[2] & 0x3F)); |
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| 164 | else |
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| 165 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 166 | |
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| 167 | if (res < 0x00000800) /* Overlong sequence */ |
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| 168 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 169 | } |
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| 170 | |
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| 171 | else if (in[0] < 0xF8) |
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| 172 | { |
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| 173 | if (*inbytesleft < (bytes = 4)) |
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| 174 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 175 | |
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| 176 | if ( ((in[0] & ~0x07) == 0xF0) |
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| 177 | && ((in[1] & 0xC0) == 0x80) |
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| 178 | && ((in[2] & 0xC0) == 0x80) |
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| 179 | && ((in[3] & 0xC0) == 0x80)) |
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| 180 | res = ((ucs4_t)(in[0] & 0x07) << 18) |
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| 181 | | ((ucs4_t)(in[1] & 0x3F) << 12) |
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| 182 | | ((ucs4_t)(in[2] & 0x3F) << 6) |
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| 183 | | ((ucs4_t)(in[3] & 0x3F)); |
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| 184 | else |
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| 185 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 186 | |
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| 187 | if (res < 0x00010000) /* Overlong sequence */ |
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| 188 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 189 | } |
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| 190 | |
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| 191 | else if (in[0] < 0xFC) |
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| 192 | { |
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| 193 | if (*inbytesleft < (bytes = 5)) |
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| 194 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 195 | |
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| 196 | if ( ((in[0] & ~0x03) == 0xF8) |
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| 197 | && ((in[1] & 0xC0) == 0x80) |
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| 198 | && ((in[2] & 0xC0) == 0x80) |
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| 199 | && ((in[3] & 0xC0) == 0x80) |
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| 200 | && ((in[4] & 0xC0) == 0x80)) |
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| 201 | res = ((ucs4_t)(in[0] & 0x03) << 24) |
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| 202 | | ((ucs4_t)(in[1] & 0x3F) << 18) |
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| 203 | | ((ucs4_t)(in[2] & 0x3F) << 12) |
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| 204 | | ((ucs4_t)(in[3] & 0x3F) << 6) |
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| 205 | | ((ucs4_t)(in[4] & 0x3F)); |
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| 206 | else |
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| 207 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 208 | |
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| 209 | if (res < 0x00200000) /* Overlong sequence */ |
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| 210 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 211 | } |
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| 212 | |
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| 213 | else if (in[0] <= 0xFD) |
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| 214 | { |
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| 215 | if (*inbytesleft < (bytes = 6)) |
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| 216 | return (ucs4_t)ICONV_CES_BAD_SEQUENCE; |
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| 217 | |
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| 218 | if ( ((in[0] & ~0x01) == 0xFC) |
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| 219 | && ((in[1] & 0xC0) == 0x80) |
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| 220 | && ((in[2] & 0xC0) == 0x80) |
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| 221 | && ((in[3] & 0xC0) == 0x80) |
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| 222 | && ((in[4] & 0xC0) == 0x80) |
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| 223 | && ((in[5] & 0xC0) == 0x80)) |
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| 224 | res = ((ucs4_t)(in[0] & 0x1) << 30) |
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| 225 | | ((ucs4_t)(in[1] & 0x3F) << 24) |
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| 226 | | ((ucs4_t)(in[2] & 0x3F) << 18) |
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| 227 | | ((ucs4_t)(in[3] & 0x3F) << 12) |
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| 228 | | ((ucs4_t)(in[4] & 0x3F) << 6) |
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| 229 | | ((ucs4_t)(in[5] & 0x3F)); |
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| 230 | else |
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| 231 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 232 | |
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| 233 | if (res < 0x04000000) /* Overlong sequence */ |
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| 234 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 235 | } |
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| 236 | |
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| 237 | else |
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| 238 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 239 | } |
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| 240 | else if (in[0] & 0x80) |
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| 241 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 242 | else |
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| 243 | { |
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| 244 | res = (ucs4_t)in[0]; |
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| 245 | bytes = 1; |
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| 246 | } |
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| 247 | |
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| 248 | if ( (res >= 0x0000D800 && res <= 0x0000DFFF) |
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| 249 | || res > 0x7FFFFFFF || res == 0x0000FFFF || res == 0x0000FFFE) |
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| 250 | return (ucs4_t)ICONV_CES_INVALID_CHARACTER; |
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| 251 | |
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| 252 | *inbytesleft -= bytes; |
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| 253 | *inbuf += bytes; |
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| 254 | |
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| 255 | return res; |
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| 256 | } |
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| 257 | #endif /* ICONV_TO_UCS_CES_UTF_8 */ |
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| 258 | |
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| 259 | static int |
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| 260 | get_mb_cur_max (void *data) |
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| 261 | { |
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| 262 | return UTF8_MB_CUR_MAX; |
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| 263 | } |
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| 264 | |
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| 265 | #if defined (ICONV_TO_UCS_CES_UTF_8) |
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| 266 | const iconv_to_ucs_ces_handlers_t |
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| 267 | _iconv_to_ucs_ces_handlers_utf_8 = |
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| 268 | { |
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| 269 | NULL, |
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| 270 | NULL, |
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| 271 | get_mb_cur_max, |
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| 272 | NULL, |
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| 273 | NULL, |
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| 274 | NULL, |
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| 275 | convert_to_ucs |
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| 276 | }; |
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| 277 | #endif |
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| 278 | |
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| 279 | #if defined (ICONV_FROM_UCS_CES_UTF_8) |
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| 280 | const iconv_from_ucs_ces_handlers_t |
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| 281 | _iconv_from_ucs_ces_handlers_utf_8 = |
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| 282 | { |
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| 283 | NULL, |
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| 284 | NULL, |
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| 285 | get_mb_cur_max, |
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| 286 | NULL, |
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| 287 | NULL, |
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| 288 | NULL, |
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| 289 | convert_from_ucs |
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| 290 | }; |
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| 291 | #endif |
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| 292 | |
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| 293 | #endif /* ICONV_TO_UCS_CES_UTF_8 || ICONV_FROM_UCS_CES_UTF_8 */ |
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| 294 | |
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