/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- _zip_guess_encoding
- _zip_unicode_to_utf8_len
- _zip_unicode_to_utf8
- _zip_cp437_to_utf8
/*
zip_utf-8.c -- UTF-8 support functions for libzip
Copyright (C) 2011-2012 Dieter Baron and Thomas Klausner
This file is part of libzip, a library to manipulate ZIP archives.
The authors can be contacted at <libzip@nih.at>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. The names of the authors may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "zipint.h"
#include <stdlib.h>
static const zip_uint16_t _cp437_to_unicode[256] = {
/* 0x00 - 0x0F */
0x2007, 0x263A, 0x263B, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
0x25D8, 0x25CB, 0x25D9, 0x2642, 0x2640, 0x266A, 0x266B, 0x263C,
/* 0x10 - 0x1F */
0x25BA, 0x25C4, 0x2195, 0x203C, 0x00B6, 0x00A7, 0x25AC, 0x21A8,
0x2191, 0x2193, 0x2192, 0x2190, 0x221F, 0x2194, 0x25B2, 0x25BC,
/* 0x20 - 0x2F */
0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
/* 0x30 - 0x3F */
0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
/* 0x40 - 0x4F */
0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x004E, 0x004F,
/* 0x50 - 0x5F */
0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
0x0058, 0x0059, 0x005A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
/* 0x60 - 0x6F */
0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
/* 0x70 - 0x7F */
0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x2302,
/* 0x80 - 0x8F */
0x00C7, 0x00FC, 0x00E9, 0x00E2, 0x00E4, 0x00E0, 0x00E5, 0x00E7,
0x00EA, 0x00EB, 0x00E8, 0x00EF, 0x00EE, 0x00EC, 0x00C4, 0x00C5,
/* 0x90 - 0x9F */
0x00C9, 0x00E6, 0x00C6, 0x00F4, 0x00F6, 0x00F2, 0x00FB, 0x00F9,
0x00FF, 0x00D6, 0x00DC, 0x00A2, 0x00A3, 0x00A5, 0x20A7, 0x0192,
/* 0xA0 - 0xAF */
0x00E1, 0x00ED, 0x00F3, 0x00FA, 0x00F1, 0x00D1, 0x00AA, 0x00BA,
0x00BF, 0x2310, 0x00AC, 0x00BD, 0x00BC, 0x00A1, 0x00AB, 0x00BB,
/* 0xB0 - 0xBF */
0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
/* 0xC0 - 0xCF */
0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
/* 0xD0 - 0xDF */
0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
/* 0xE0 - 0xEF */
0x03B1, 0x00DF, 0x0393, 0x03C0, 0x03A3, 0x03C3, 0x00B5, 0x03C4,
0x03A6, 0x0398, 0x03A9, 0x03B4, 0x221E, 0x03C6, 0x03B5, 0x2229,
/* 0xF0 - 0xFF */
0x2261, 0x00B1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00F7, 0x2248,
0x00B0, 0x2219, 0x00B7, 0x221A, 0x207F, 0x00B2, 0x25A0, 0x00A0
};
#define UTF_8_LEN_2_MASK 0xe0
#define UTF_8_LEN_2_MATCH 0xc0
#define UTF_8_LEN_3_MASK 0xf0
#define UTF_8_LEN_3_MATCH 0xe0
#define UTF_8_LEN_4_MASK 0xf8
#define UTF_8_LEN_4_MATCH 0xf0
#define UTF_8_CONTINUE_MASK 0xc0
#define UTF_8_CONTINUE_MATCH 0x80
enum zip_encoding_type
_zip_guess_encoding(struct zip_string *str, enum zip_encoding_type expected_encoding)
{
enum zip_encoding_type enc;
const zip_uint8_t *name;
zip_uint32_t i, j, ulen;
if (str == NULL)
return ZIP_ENCODING_ASCII;
name = str->raw;
if (str->encoding != ZIP_ENCODING_UNKNOWN)
enc = str->encoding;
else {
enc = ZIP_ENCODING_ASCII;
for (i=0; i<str->length; i++) {
if ((name[i] > 31 && name[i] < 128) || name[i] == '\r' || name[i] == '\n' || name[i] == '\t')
continue;
enc = ZIP_ENCODING_UTF8_GUESSED;
if ((name[i] & UTF_8_LEN_2_MASK) == UTF_8_LEN_2_MATCH)
ulen = 1;
else if ((name[i] & UTF_8_LEN_3_MASK) == UTF_8_LEN_3_MATCH)
ulen = 2;
else if ((name[i] & UTF_8_LEN_4_MASK) == UTF_8_LEN_4_MATCH)
ulen = 3;
else {
enc = ZIP_ENCODING_CP437;
break;
}
if (i + ulen >= str->length) {
enc = ZIP_ENCODING_CP437;
break;
}
for (j=1; j<=ulen; j++) {
if ((name[i+j] & UTF_8_CONTINUE_MASK) != UTF_8_CONTINUE_MATCH) {
enc = ZIP_ENCODING_CP437;
goto done;
}
}
i += ulen;
}
}
done:
str->encoding = enc;
if (expected_encoding != ZIP_ENCODING_UNKNOWN) {
if (expected_encoding == ZIP_ENCODING_UTF8_KNOWN && enc == ZIP_ENCODING_UTF8_GUESSED)
str->encoding = enc = ZIP_ENCODING_UTF8_KNOWN;
if (expected_encoding != enc && enc != ZIP_ENCODING_ASCII)
return ZIP_ENCODING_ERROR;
}
return enc;
}
static zip_uint32_t
_zip_unicode_to_utf8_len(zip_uint32_t codepoint)
{
if (codepoint < 0x0080)
return 1;
if (codepoint < 0x0800)
return 2;
if (codepoint < 0x10000)
return 3;
return 4;
}
static zip_uint32_t
_zip_unicode_to_utf8(zip_uint32_t codepoint, zip_uint8_t *buf)
{
if (codepoint < 0x0080) {
buf[0] = codepoint & 0xff;
return 1;
}
if (codepoint < 0x0800) {
buf[0] = UTF_8_LEN_2_MATCH | ((codepoint >> 6) & 0x1f);
buf[1] = UTF_8_CONTINUE_MATCH | (codepoint & 0x3f);
return 2;
}
if (codepoint < 0x10000) {
buf[0] = UTF_8_LEN_3_MATCH | ((codepoint >> 12) & 0x0f);
buf[1] = UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f);
buf[2] = UTF_8_CONTINUE_MATCH | (codepoint & 0x3f);
return 3;
}
buf[0] = UTF_8_LEN_4_MATCH | ((codepoint >> 18) & 0x07);
buf[1] = UTF_8_CONTINUE_MATCH | ((codepoint >> 12) & 0x3f);
buf[2] = UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f);
buf[3] = UTF_8_CONTINUE_MATCH | (codepoint & 0x3f);
return 4;
}
zip_uint8_t *
_zip_cp437_to_utf8(const zip_uint8_t * const _cp437buf, zip_uint32_t len,
zip_uint32_t *utf8_lenp, struct zip_error *error)
{
zip_uint8_t *cp437buf = (zip_uint8_t *)_cp437buf;
zip_uint8_t *utf8buf;
zip_uint32_t buflen, i, offset;
if (len == 0) {
if (utf8_lenp)
*utf8_lenp = 0;
return NULL;
}
buflen = 1;
for (i=0; i<len; i++)
buflen += _zip_unicode_to_utf8_len(_cp437_to_unicode[cp437buf[i]]);
if ((utf8buf=(zip_uint8_t*)malloc(buflen)) == NULL) {
_zip_error_set(error, ZIP_ER_MEMORY, 0);
return NULL;
}
offset = 0;
for (i=0; i<len; i++)
offset += _zip_unicode_to_utf8(_cp437_to_unicode[cp437buf[i]],
utf8buf+offset);
utf8buf[buflen-1] = 0;
if (utf8_lenp)
*utf8_lenp = buflen-1;
return utf8buf;
}