/* zip_utf-8.c -- UTF-8 support functions for libzip Copyright (C) 2011-2021 Dieter Baron and Thomas Klausner This file is part of libzip, a library to manipulate ZIP archives. The authors can be contacted at <info@libzip.org> 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 */ 0x0000, 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 zip_encoding_type_t _zip_guess_encoding(zip_string_t *str, zip_encoding_type_t expected_encoding) { zip_encoding_type_t 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] = (zip_uint8_t)(UTF_8_LEN_2_MATCH | ((codepoint >> 6) & 0x1f)); buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | (codepoint & 0x3f)); return 2; } if (codepoint < 0x10000) { buf[0] = (zip_uint8_t)(UTF_8_LEN_3_MATCH | ((codepoint >> 12) & 0x0f)); buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f)); buf[2] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | (codepoint & 0x3f)); return 3; } buf[0] = (zip_uint8_t)(UTF_8_LEN_4_MATCH | ((codepoint >> 18) & 0x07)); buf[1] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 12) & 0x3f)); buf[2] = (zip_uint8_t)(UTF_8_CONTINUE_MATCH | ((codepoint >> 6) & 0x3f)); buf[3] = (zip_uint8_t)(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, zip_error_t *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; }