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Member "src/Common/libzip/zip_utf-8.c" (10 Oct 2018, 7849 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2   zip_utf-8.c -- UTF-8 support functions for libzip
    3   Copyright (C) 2011-2014 Dieter Baron and Thomas Klausner
    4 
    5   This file is part of libzip, a library to manipulate ZIP archives.
    6   The authors can be contacted at <libzip@nih.at>
    7 
    8   Redistribution and use in source and binary forms, with or without
    9   modification, are permitted provided that the following conditions
   10   are met:
   11   1. Redistributions of source code must retain the above copyright
   12      notice, this list of conditions and the following disclaimer.
   13   2. Redistributions in binary form must reproduce the above copyright
   14      notice, this list of conditions and the following disclaimer in
   15      the documentation and/or other materials provided with the
   16      distribution.
   17   3. The names of the authors may not be used to endorse or promote
   18      products derived from this software without specific prior
   19      written permission.
   20 
   21   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
   22   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   25   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   27   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   29   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   31   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32 */
   33 
   34 
   35 #include "zipint.h"
   36 
   37 #include <stdlib.h>
   38 
   39 
   40 static const zip_uint16_t _cp437_to_unicode[256] = {
   41     /* 0x00 - 0x0F */
   42     0x2007, 0x263A, 0x263B, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, 0x25D8, 0x25CB, 0x25D9, 0x2642, 0x2640, 0x266A, 0x266B, 0x263C,
   43 
   44     /* 0x10 - 0x1F */
   45     0x25BA, 0x25C4, 0x2195, 0x203C, 0x00B6, 0x00A7, 0x25AC, 0x21A8, 0x2191, 0x2193, 0x2192, 0x2190, 0x221F, 0x2194, 0x25B2, 0x25BC,
   46 
   47     /* 0x20 - 0x2F */
   48     0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
   49 
   50     /* 0x30 - 0x3F */
   51     0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
   52 
   53     /* 0x40 - 0x4F */
   54     0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x004E, 0x004F,
   55 
   56     /* 0x50 - 0x5F */
   57     0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
   58 
   59     /* 0x60 - 0x6F */
   60     0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
   61 
   62     /* 0x70 - 0x7F */
   63     0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x2302,
   64 
   65     /* 0x80 - 0x8F */
   66     0x00C7, 0x00FC, 0x00E9, 0x00E2, 0x00E4, 0x00E0, 0x00E5, 0x00E7, 0x00EA, 0x00EB, 0x00E8, 0x00EF, 0x00EE, 0x00EC, 0x00C4, 0x00C5,
   67 
   68     /* 0x90 - 0x9F */
   69     0x00C9, 0x00E6, 0x00C6, 0x00F4, 0x00F6, 0x00F2, 0x00FB, 0x00F9, 0x00FF, 0x00D6, 0x00DC, 0x00A2, 0x00A3, 0x00A5, 0x20A7, 0x0192,
   70 
   71     /* 0xA0 - 0xAF */
   72     0x00E1, 0x00ED, 0x00F3, 0x00FA, 0x00F1, 0x00D1, 0x00AA, 0x00BA, 0x00BF, 0x2310, 0x00AC, 0x00BD, 0x00BC, 0x00A1, 0x00AB, 0x00BB,
   73 
   74     /* 0xB0 - 0xBF */
   75     0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
   76 
   77     /* 0xC0 - 0xCF */
   78     0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
   79 
   80     /* 0xD0 - 0xDF */
   81     0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
   82 
   83     /* 0xE0 - 0xEF */
   84     0x03B1, 0x00DF, 0x0393, 0x03C0, 0x03A3, 0x03C3, 0x00B5, 0x03C4, 0x03A6, 0x0398, 0x03A9, 0x03B4, 0x221E, 0x03C6, 0x03B5, 0x2229,
   85 
   86     /* 0xF0 - 0xFF */
   87     0x2261, 0x00B1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00F7, 0x2248, 0x00B0, 0x2219, 0x00B7, 0x221A, 0x207F, 0x00B2, 0x25A0, 0x00A0};
   88 
   89 #define UTF_8_LEN_2_MASK 0xe0
   90 #define UTF_8_LEN_2_MATCH 0xc0
   91 #define UTF_8_LEN_3_MASK 0xf0
   92 #define UTF_8_LEN_3_MATCH 0xe0
   93 #define UTF_8_LEN_4_MASK 0xf8
   94 #define UTF_8_LEN_4_MATCH 0xf0
   95 #define UTF_8_CONTINUE_MASK 0xc0
   96 #define UTF_8_CONTINUE_MATCH 0x80
   97 
   98 
   99 zip_encoding_type_t
  100 _zip_guess_encoding(zip_string_t *str, zip_encoding_type_t expected_encoding) {
  101     zip_encoding_type_t enc;
  102     const zip_uint8_t *name;
  103     zip_uint32_t i, j, ulen;
  104 
  105     if (str == NULL)
  106     return ZIP_ENCODING_ASCII;
  107 
  108     name = str->raw;
  109 
  110     if (str->encoding != ZIP_ENCODING_UNKNOWN)
  111     enc = str->encoding;
  112     else {
  113     enc = ZIP_ENCODING_ASCII;
  114     for (i = 0; i < str->length; i++) {
  115         if ((name[i] > 31 && name[i] < 128) || name[i] == '\r' || name[i] == '\n' || name[i] == '\t')
  116         continue;
  117 
  118         enc = ZIP_ENCODING_UTF8_GUESSED;
  119         if ((name[i] & UTF_8_LEN_2_MASK) == UTF_8_LEN_2_MATCH)
  120         ulen = 1;
  121         else if ((name[i] & UTF_8_LEN_3_MASK) == UTF_8_LEN_3_MATCH)
  122         ulen = 2;
  123         else if ((name[i] & UTF_8_LEN_4_MASK) == UTF_8_LEN_4_MATCH)
  124         ulen = 3;
  125         else {
  126         enc = ZIP_ENCODING_CP437;
  127         break;
  128         }
  129 
  130         if (i + ulen >= str->length) {
  131         enc = ZIP_ENCODING_CP437;
  132         break;
  133         }
  134 
  135         for (j = 1; j <= ulen; j++) {
  136         if ((name[i + j] & UTF_8_CONTINUE_MASK) != UTF_8_CONTINUE_MATCH) {
  137             enc = ZIP_ENCODING_CP437;
  138             goto done;
  139         }
  140         }
  141         i += ulen;
  142     }
  143     }
  144 
  145 done:
  146     str->encoding = enc;
  147 
  148     if (expected_encoding != ZIP_ENCODING_UNKNOWN) {
  149     if (expected_encoding == ZIP_ENCODING_UTF8_KNOWN && enc == ZIP_ENCODING_UTF8_GUESSED)
  150         str->encoding = enc = ZIP_ENCODING_UTF8_KNOWN;
  151 
  152     if (expected_encoding != enc && enc != ZIP_ENCODING_ASCII)
  153         return ZIP_ENCODING_ERROR;
  154     }
  155 
  156     return enc;
  157 }
  158 
  159 
  160 static zip_uint32_t
  161 _zip_unicode_to_utf8_len(zip_uint32_t codepoint) {
  162     if (codepoint < 0x0080)
  163     return 1;
  164     if (codepoint < 0x0800)
  165     return 2;
  166     if (codepoint < 0x10000)
  167     return 3;
  168     return 4;
  169 }
  170 
  171 
  172 static zip_uint32_t
  173 _zip_unicode_to_utf8(zip_uint32_t codepoint, zip_uint8_t *buf) {
  174     if (codepoint < 0x0080) {
  175     buf[0] = codepoint & 0xff;
  176     return 1;
  177     }
  178     if (codepoint < 0x0800) {
  179     buf[0] = (zip_uint8_t)(UTF_8_LEN_2_MATCH | ((codepoint >> 6) & 0x1f));
  180     buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | (codepoint & 0x3f));
  181     return 2;
  182     }
  183     if (codepoint < 0x10000) {
  184     buf[0] = (zip_uint8_t)(UTF_8_LEN_3_MATCH | ((codepoint >> 12) & 0x0f));
  185     buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f));
  186     buf[2] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | (codepoint & 0x3f));
  187     return 3;
  188     }
  189     buf[0] = (zip_uint8_t)(UTF_8_LEN_4_MATCH | ((codepoint >> 18) & 0x07));
  190     buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 12) & 0x3f));
  191     buf[2] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f));
  192     buf[3] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | (codepoint & 0x3f));
  193     return 4;
  194 }
  195 
  196 
  197 zip_uint8_t *
  198 _zip_cp437_to_utf8(const zip_uint8_t *const _cp437buf, zip_uint32_t len, zip_uint32_t *utf8_lenp, zip_error_t *error) {
  199     zip_uint8_t *cp437buf = (zip_uint8_t *)_cp437buf;
  200     zip_uint8_t *utf8buf;
  201     zip_uint32_t buflen, i, offset;
  202 
  203     if (len == 0) {
  204     if (utf8_lenp)
  205         *utf8_lenp = 0;
  206     return NULL;
  207     }
  208 
  209     buflen = 1;
  210     for (i = 0; i < len; i++)
  211     buflen += _zip_unicode_to_utf8_len(_cp437_to_unicode[cp437buf[i]]);
  212 
  213     if ((utf8buf = (zip_uint8_t *)malloc(buflen)) == NULL) {
  214     zip_error_set(error, ZIP_ER_MEMORY, 0);
  215     return NULL;
  216     }
  217 
  218     offset = 0;
  219     for (i = 0; i < len; i++)
  220     offset += _zip_unicode_to_utf8(_cp437_to_unicode[cp437buf[i]], utf8buf + offset);
  221 
  222     utf8buf[buflen - 1] = 0;
  223     if (utf8_lenp)
  224     *utf8_lenp = buflen - 1;
  225     return utf8buf;
  226 }