| 1 | /* Character set conversion.
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| 2 | Copyright (C) 1999-2001, 2007, 2009-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License along
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| 15 | with this program; if not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | #include <config.h>
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| 18 |
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| 19 | /* Specification. */
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| 20 | #include <iconv.h>
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| 21 |
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| 22 | #include <stddef.h>
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| 23 |
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| 24 | #if REPLACE_ICONV_UTF
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| 25 | # include <errno.h>
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| 26 | # include <stdint.h>
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| 27 | # include <stdlib.h>
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| 28 | # include "unistr.h"
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| 29 | # ifndef uintptr_t
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| 30 | # define uintptr_t unsigned long
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| 31 | # endif
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| 32 | #endif
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| 33 |
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| 34 | #if REPLACE_ICONV_UTF
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| 35 |
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| 36 | /* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */
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| 37 |
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| 38 | /* Return code if invalid. (xxx_mbtowc) */
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| 39 | # define RET_ILSEQ -1
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| 40 | /* Return code if no bytes were read. (xxx_mbtowc) */
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| 41 | # define RET_TOOFEW -2
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| 42 |
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| 43 | /* Return code if invalid. (xxx_wctomb) */
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| 44 | # define RET_ILUNI -1
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| 45 | /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
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| 46 | # define RET_TOOSMALL -2
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| 47 |
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| 48 | /*
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| 49 | * UTF-16BE
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| 50 | */
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| 51 |
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| 52 | /* Specification: RFC 2781 */
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| 53 |
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| 54 | static int
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| 55 | utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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| 56 | {
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| 57 | if (n >= 2)
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| 58 | {
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| 59 | ucs4_t wc = (s[0] << 8) + s[1];
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| 60 | if (wc >= 0xd800 && wc < 0xdc00)
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| 61 | {
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| 62 | if (n >= 4)
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| 63 | {
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| 64 | ucs4_t wc2 = (s[2] << 8) + s[3];
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| 65 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
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| 66 | return RET_ILSEQ;
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| 67 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
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| 68 | return 4;
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| 69 | }
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| 70 | }
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| 71 | else if (wc >= 0xdc00 && wc < 0xe000)
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| 72 | {
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| 73 | return RET_ILSEQ;
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| 74 | }
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| 75 | else
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| 76 | {
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| 77 | *pwc = wc;
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| 78 | return 2;
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| 79 | }
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| 80 | }
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| 81 | return RET_TOOFEW;
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| 82 | }
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| 83 |
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| 84 | static int
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| 85 | utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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| 86 | {
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| 87 | if (!(wc >= 0xd800 && wc < 0xe000))
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| 88 | {
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| 89 | if (wc < 0x10000)
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| 90 | {
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| 91 | if (n >= 2)
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| 92 | {
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| 93 | r[0] = (unsigned char) (wc >> 8);
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| 94 | r[1] = (unsigned char) wc;
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| 95 | return 2;
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| 96 | }
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| 97 | else
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| 98 | return RET_TOOSMALL;
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| 99 | }
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| 100 | else if (wc < 0x110000)
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| 101 | {
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| 102 | if (n >= 4)
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| 103 | {
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| 104 | ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
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| 105 | ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
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| 106 | r[0] = (unsigned char) (wc1 >> 8);
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| 107 | r[1] = (unsigned char) wc1;
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| 108 | r[2] = (unsigned char) (wc2 >> 8);
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| 109 | r[3] = (unsigned char) wc2;
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| 110 | return 4;
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| 111 | }
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| 112 | else
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| 113 | return RET_TOOSMALL;
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| 114 | }
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| 115 | }
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| 116 | return RET_ILUNI;
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| 117 | }
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| 118 |
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| 119 | /*
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| 120 | * UTF-16LE
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| 121 | */
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| 122 |
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| 123 | /* Specification: RFC 2781 */
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| 124 |
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| 125 | static int
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| 126 | utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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| 127 | {
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| 128 | if (n >= 2)
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| 129 | {
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| 130 | ucs4_t wc = s[0] + (s[1] << 8);
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| 131 | if (wc >= 0xd800 && wc < 0xdc00)
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| 132 | {
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| 133 | if (n >= 4)
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| 134 | {
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| 135 | ucs4_t wc2 = s[2] + (s[3] << 8);
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| 136 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
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| 137 | return RET_ILSEQ;
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| 138 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
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| 139 | return 4;
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| 140 | }
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| 141 | }
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| 142 | else if (wc >= 0xdc00 && wc < 0xe000)
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| 143 | {
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| 144 | return RET_ILSEQ;
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| 145 | }
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| 146 | else
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| 147 | {
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| 148 | *pwc = wc;
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| 149 | return 2;
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| 150 | }
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| 151 | }
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| 152 | return RET_TOOFEW;
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| 153 | }
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| 154 |
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| 155 | static int
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| 156 | utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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| 157 | {
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| 158 | if (!(wc >= 0xd800 && wc < 0xe000))
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| 159 | {
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| 160 | if (wc < 0x10000)
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| 161 | {
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| 162 | if (n >= 2)
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| 163 | {
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| 164 | r[0] = (unsigned char) wc;
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| 165 | r[1] = (unsigned char) (wc >> 8);
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| 166 | return 2;
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| 167 | }
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| 168 | else
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| 169 | return RET_TOOSMALL;
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| 170 | }
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| 171 | else if (wc < 0x110000)
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| 172 | {
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| 173 | if (n >= 4)
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| 174 | {
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| 175 | ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
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| 176 | ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
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| 177 | r[0] = (unsigned char) wc1;
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| 178 | r[1] = (unsigned char) (wc1 >> 8);
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| 179 | r[2] = (unsigned char) wc2;
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| 180 | r[3] = (unsigned char) (wc2 >> 8);
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| 181 | return 4;
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| 182 | }
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| 183 | else
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| 184 | return RET_TOOSMALL;
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| 185 | }
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| 186 | }
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| 187 | return RET_ILUNI;
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| 188 | }
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| 189 |
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| 190 | /*
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| 191 | * UTF-32BE
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| 192 | */
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| 193 |
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| 194 | /* Specification: Unicode 3.1 Standard Annex #19 */
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| 195 |
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| 196 | static int
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| 197 | utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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| 198 | {
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| 199 | if (n >= 4)
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| 200 | {
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| 201 | ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3];
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| 202 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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| 203 | {
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| 204 | *pwc = wc;
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| 205 | return 4;
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| 206 | }
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| 207 | else
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| 208 | return RET_ILSEQ;
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| 209 | }
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| 210 | return RET_TOOFEW;
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| 211 | }
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| 212 |
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| 213 | static int
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| 214 | utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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| 215 | {
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| 216 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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| 217 | {
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| 218 | if (n >= 4)
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| 219 | {
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| 220 | r[0] = 0;
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| 221 | r[1] = (unsigned char) (wc >> 16);
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| 222 | r[2] = (unsigned char) (wc >> 8);
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| 223 | r[3] = (unsigned char) wc;
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| 224 | return 4;
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| 225 | }
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| 226 | else
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| 227 | return RET_TOOSMALL;
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| 228 | }
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| 229 | return RET_ILUNI;
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| 230 | }
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| 231 |
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| 232 | /*
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| 233 | * UTF-32LE
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| 234 | */
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| 235 |
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| 236 | /* Specification: Unicode 3.1 Standard Annex #19 */
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| 237 |
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| 238 | static int
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| 239 | utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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| 240 | {
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| 241 | if (n >= 4)
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| 242 | {
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| 243 | ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24);
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| 244 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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| 245 | {
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| 246 | *pwc = wc;
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| 247 | return 4;
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| 248 | }
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| 249 | else
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| 250 | return RET_ILSEQ;
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| 251 | }
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| 252 | return RET_TOOFEW;
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| 253 | }
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| 254 |
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| 255 | static int
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| 256 | utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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| 257 | {
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| 258 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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| 259 | {
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| 260 | if (n >= 4)
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| 261 | {
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| 262 | r[0] = (unsigned char) wc;
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| 263 | r[1] = (unsigned char) (wc >> 8);
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| 264 | r[2] = (unsigned char) (wc >> 16);
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| 265 | r[3] = 0;
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| 266 | return 4;
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| 267 | }
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| 268 | else
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| 269 | return RET_TOOSMALL;
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| 270 | }
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| 271 | return RET_ILUNI;
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| 272 | }
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| 273 |
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| 274 | #endif
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| 275 |
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| 276 | size_t
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| 277 | rpl_iconv (iconv_t cd,
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| 278 | ICONV_CONST char **inbuf, size_t *inbytesleft,
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| 279 | char **outbuf, size_t *outbytesleft)
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| 280 | #undef iconv
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| 281 | {
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| 282 | #if REPLACE_ICONV_UTF
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| 283 | switch ((uintptr_t) cd)
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| 284 | {
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| 285 | {
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| 286 | int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t);
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| 287 |
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| 288 | case (uintptr_t) _ICONV_UTF8_UTF16BE:
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| 289 | xxx_wctomb = utf16be_wctomb;
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| 290 | goto loop_from_utf8;
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| 291 | case (uintptr_t) _ICONV_UTF8_UTF16LE:
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| 292 | xxx_wctomb = utf16le_wctomb;
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| 293 | goto loop_from_utf8;
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| 294 | case (uintptr_t) _ICONV_UTF8_UTF32BE:
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| 295 | xxx_wctomb = utf32be_wctomb;
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| 296 | goto loop_from_utf8;
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| 297 | case (uintptr_t) _ICONV_UTF8_UTF32LE:
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| 298 | xxx_wctomb = utf32le_wctomb;
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| 299 | goto loop_from_utf8;
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| 300 |
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| 301 | loop_from_utf8:
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| 302 | if (inbuf == NULL || *inbuf == NULL)
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| 303 | return 0;
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| 304 | {
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| 305 | ICONV_CONST char *inptr = *inbuf;
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| 306 | size_t inleft = *inbytesleft;
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| 307 | char *outptr = *outbuf;
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| 308 | size_t outleft = *outbytesleft;
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| 309 | size_t res = 0;
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| 310 | while (inleft > 0)
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| 311 | {
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| 312 | ucs4_t uc;
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| 313 | int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft);
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| 314 | if (m <= 0)
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| 315 | {
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| 316 | if (m == -1)
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| 317 | {
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| 318 | errno = EILSEQ;
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| 319 | res = (size_t)(-1);
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| 320 | break;
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| 321 | }
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| 322 | if (m == -2)
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| 323 | {
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| 324 | errno = EINVAL;
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| 325 | res = (size_t)(-1);
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| 326 | break;
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| 327 | }
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| 328 | abort ();
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| 329 | }
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| 330 | else
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| 331 | {
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| 332 | int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft);
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| 333 | if (n < 0)
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| 334 | {
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| 335 | if (n == RET_ILUNI)
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| 336 | {
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| 337 | errno = EILSEQ;
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| 338 | res = (size_t)(-1);
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| 339 | break;
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| 340 | }
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| 341 | if (n == RET_TOOSMALL)
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| 342 | {
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| 343 | errno = E2BIG;
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| 344 | res = (size_t)(-1);
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| 345 | break;
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| 346 | }
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| 347 | abort ();
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| 348 | }
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| 349 | else
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| 350 | {
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| 351 | inptr += m;
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| 352 | inleft -= m;
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| 353 | outptr += n;
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| 354 | outleft -= n;
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| 355 | }
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| 356 | }
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| 357 | }
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| 358 | *inbuf = inptr;
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| 359 | *inbytesleft = inleft;
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| 360 | *outbuf = outptr;
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| 361 | *outbytesleft = outleft;
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| 362 | return res;
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| 363 | }
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| 364 | }
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| 365 |
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| 366 | {
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| 367 | int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t);
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| 368 |
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| 369 | case (uintptr_t) _ICONV_UTF16BE_UTF8:
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| 370 | xxx_mbtowc = utf16be_mbtowc;
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| 371 | goto loop_to_utf8;
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| 372 | case (uintptr_t) _ICONV_UTF16LE_UTF8:
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| 373 | xxx_mbtowc = utf16le_mbtowc;
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| 374 | goto loop_to_utf8;
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| 375 | case (uintptr_t) _ICONV_UTF32BE_UTF8:
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| 376 | xxx_mbtowc = utf32be_mbtowc;
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| 377 | goto loop_to_utf8;
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| 378 | case (uintptr_t) _ICONV_UTF32LE_UTF8:
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| 379 | xxx_mbtowc = utf32le_mbtowc;
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| 380 | goto loop_to_utf8;
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| 381 |
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| 382 | loop_to_utf8:
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| 383 | if (inbuf == NULL || *inbuf == NULL)
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| 384 | return 0;
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| 385 | {
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| 386 | ICONV_CONST char *inptr = *inbuf;
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| 387 | size_t inleft = *inbytesleft;
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| 388 | char *outptr = *outbuf;
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| 389 | size_t outleft = *outbytesleft;
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| 390 | size_t res = 0;
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| 391 | while (inleft > 0)
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| 392 | {
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| 393 | ucs4_t uc;
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| 394 | int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft);
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| 395 | if (m <= 0)
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| 396 | {
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| 397 | if (m == RET_ILSEQ)
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| 398 | {
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| 399 | errno = EILSEQ;
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| 400 | res = (size_t)(-1);
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| 401 | break;
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| 402 | }
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| 403 | if (m == RET_TOOFEW)
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| 404 | {
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| 405 | errno = EINVAL;
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| 406 | res = (size_t)(-1);
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| 407 | break;
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| 408 | }
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| 409 | abort ();
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| 410 | }
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| 411 | else
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| 412 | {
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| 413 | int n = u8_uctomb ((uint8_t *) outptr, uc, outleft);
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| 414 | if (n < 0)
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| 415 | {
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| 416 | if (n == -1)
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| 417 | {
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| 418 | errno = EILSEQ;
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| 419 | res = (size_t)(-1);
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| 420 | break;
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| 421 | }
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| 422 | if (n == -2)
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| 423 | {
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| 424 | errno = E2BIG;
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| 425 | res = (size_t)(-1);
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| 426 | break;
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| 427 | }
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| 428 | abort ();
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| 429 | }
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| 430 | else
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| 431 | {
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| 432 | inptr += m;
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| 433 | inleft -= m;
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| 434 | outptr += n;
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| 435 | outleft -= n;
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| 436 | }
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| 437 | }
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| 438 | }
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|---|
| 439 | *inbuf = inptr;
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|---|
| 440 | *inbytesleft = inleft;
|
|---|
| 441 | *outbuf = outptr;
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|---|
| 442 | *outbytesleft = outleft;
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|---|
| 443 | return res;
|
|---|
| 444 | }
|
|---|
| 445 | }
|
|---|
| 446 | }
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|---|
| 447 | #endif
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|---|
| 448 | return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft);
|
|---|
| 449 | }
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|---|