/* zutil.h -- internal interface and configuration of the compression library * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ /* WARNING: this file should *not* be used by applications. It is part of the implementation of the compression library and is subject to change. Applications should only use zlib.h. */ /* @(#) $Id$ */ #ifndef ZUTIL_H #define ZUTIL_H #ifdef HAVE_HIDDEN # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) #else # define ZLIB_INTERNAL #endif #include "zlib.h" #if defined(STDC) && !defined(Z_SOLO) # if !(defined(_WIN32_WCE) && defined(_MSC_VER)) # include # endif # include # include #endif #ifdef Z_SOLO typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */ #endif #ifndef local # define local static #endif /* since "static" is used to mean two completely different things in C, we define "local" for the non-static meaning of "static", for readability (compile with -Dlocal if your debugger can't find static symbols) */ typedef unsigned char uch; typedef uch FAR uchf; typedef unsigned short ush; typedef ush FAR ushf; typedef unsigned long ulg; extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ /* (size given to avoid silly warnings with Visual C++) */ #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] #define ERR_RETURN(strm,err) \ return (strm->msg = ERR_MSG(err), (err)) /* To be used only when the state is known to be valid */ /* common constants */ #ifndef DEF_WBITS # define DEF_WBITS MAX_WBITS #endif /* default windowBits for decompression. MAX_WBITS is for compression only */ #if MAX_MEM_LEVEL >= 8 # define DEF_MEM_LEVEL 8 #else # define DEF_MEM_LEVEL MAX_MEM_LEVEL #endif /* default memLevel */ #define STORED_BLOCK 0 #define STATIC_TREES 1 #define DYN_TREES 2 /* The three kinds of block type */ #define MIN_MATCH 3 #define MAX_MATCH 258 /* The minimum and maximum match lengths */ #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ /* target dependencies */ #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) # define OS_CODE 0x00 # ifndef Z_SOLO # if defined(__TURBOC__) || defined(__BORLANDC__) # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) /* Allow compilation with ANSI keywords only enabled */ void _Cdecl farfree( void *block ); void *_Cdecl farmalloc( unsigned long nbytes ); # else # include # endif # else /* MSC or DJGPP */ # include # endif # endif #endif #ifdef AMIGA # define OS_CODE 1 #endif #if defined(VAXC) || defined(VMS) # define OS_CODE 2 # define F_OPEN(name, mode) \ fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") #endif #ifdef __370__ # if __TARGET_LIB__ < 0x20000000 # define OS_CODE 4 # elif __TARGET_LIB__ < 0x40000000 # define OS_CODE 11 # else # define OS_CODE 8 # endif #endif #if defined(ATARI) || defined(atarist) # define OS_CODE 5 #endif #ifdef OS2 # define OS_CODE 6 # if defined(M_I86) && !defined(Z_SOLO) # include # endif #endif #if defined(MACOS) || defined(TARGET_OS_MAC) # define OS_CODE 7 # ifndef Z_SOLO # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os # include /* for fdopen */ # else # ifndef fdopen # define fdopen(fd,mode) NULL /* No fdopen() */ # endif # endif # endif #endif #ifdef __acorn # define OS_CODE 13 #endif #if defined(WIN32) && !defined(__CYGWIN__) # define OS_CODE 10 #endif #ifdef _BEOS_ # define OS_CODE 16 #endif #ifdef __TOS_OS400__ # define OS_CODE 18 #endif #ifdef __APPLE__ # define OS_CODE 19 #endif #if defined(_BEOS_) || defined(RISCOS) # define fdopen(fd,mode) NULL /* No fdopen() */ #endif #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX # if defined(_WIN32_WCE) # define fdopen(fd,mode) NULL /* No fdopen() */ # ifndef _PTRDIFF_T_DEFINED typedef int ptrdiff_t; # define _PTRDIFF_T_DEFINED # endif # else # define fdopen(fd,type) _fdopen(fd,type) # endif #endif #if defined(__BORLANDC__) && !defined(MSDOS) #pragma warn -8004 #pragma warn -8008 #pragma warn -8066 #endif /* provide prototypes for these when building zlib without LFS */ #if !defined(_WIN32) && \ (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0) ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); #endif /* common defaults */ #ifndef OS_CODE # define OS_CODE 3 /* assume Unix */ #endif #ifndef F_OPEN # define F_OPEN(name, mode) fopen((name), (mode)) #endif /* functions */ #if defined(pyr) || defined(Z_SOLO) # define NO_MEMCPY #endif #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) /* Use our own functions for small and medium model with MSC <= 5.0. * You may have to use the same strategy for Borland C (untested). * The __SC__ check is for Symantec. */ # define NO_MEMCPY #endif #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) # define HAVE_MEMCPY #endif #ifdef HAVE_MEMCPY # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ # define zmemcpy _fmemcpy # define zmemcmp _fmemcmp # define zmemzero(dest, len) _fmemset(dest, 0, len) # else # define zmemcpy memcpy # define zmemcmp memcmp # define zmemzero(dest, len) memset(dest, 0, len) # endif #else void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len)); #endif /* Diagnostic functions */ #ifdef ZLIB_DEBUG # include extern int ZLIB_INTERNAL z_verbose; extern void ZLIB_INTERNAL z_error OF((char *m)); # define Assert(cond,msg) {if(!(cond)) z_error(msg);} # define Trace(x) {if (z_verbose>=0) fprintf x ;} # define Tracev(x) {if (z_verbose>0) fprintf x ;} # define Tracevv(x) {if (z_verbose>1) fprintf x ;} # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} #else # define Assert(cond,msg) # define Trace(x) # define Tracev(x) # define Tracevv(x) # define Tracec(c,x) # define Tracecv(c,x) #endif #ifndef Z_SOLO voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, unsigned size)); void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); #endif #define ZALLOC(strm, items, size) \ (*((strm)->zalloc))((strm)->opaque, (items), (size)) #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} /* Reverse the bytes in a 32-bit value */ #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) #endif /* ZUTIL_H */ 2' href='#n112'>112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 
/*
  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;
}