/* zutil.cpp -- target dependent utility functions for the compression library+
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 * Copyright (C) 1995-2005 Jean-loup Gailly.+
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 * For conditions of distribution and use, see copyright notice in zlib.h+
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 */+
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+
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/* @(#) $Id: zutil.cpp,v 1.1.2.1 2008/08/14 15:26:58 e0222316 Exp $ */+
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+
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#ifdef SYMBIAN_EZLIB_DEVICE+
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  #include <e32base.h>+
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#endif+
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+
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#include "zutil.h"+
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+
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+
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#ifndef NO_DUMMY_DECL+
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struct internal_state      {int dummy;}; /* for buggy compilers */+
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#endif+
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+
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+
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const char * const z_errmsg[10] = {+
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"need dictionary",     /* Z_NEED_DICT       2  */+
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"stream end",          /* Z_STREAM_END      1  */+
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"",                    /* Z_OK              0  */+
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"file error",          /* Z_ERRNO         (-1) */+
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"stream error",        /* Z_STREAM_ERROR  (-2) */+
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"data error",          /* Z_DATA_ERROR    (-3) */+
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"insufficient memory", /* Z_MEM_ERROR     (-4) */+
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"buffer error",        /* Z_BUF_ERROR     (-5) */+
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"incompatible version",/* Z_VERSION_ERROR (-6) */+
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""};+
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+
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+
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#ifdef __SYMBIAN32__+
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EXPORT_C const char *  zlibVersion_r()+
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#else+
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const char * ZEXPORT zlibVersion()+
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#endif //__SYMBIAN32__+
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{+
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    return ZLIB_VERSION;+
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}+
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+
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+
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#ifdef __SYMBIAN32__+
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EXPORT_C uLong  zlibCompileFlags_r()+
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#else+
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uLong ZEXPORT zlibCompileFlags()+
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#endif //__SYMBIAN32__+
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{+
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    uLong flags;+
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+
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    flags = 0;+
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    switch (sizeof(uInt)) {+
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    case 2:     break;+
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    case 4:     flags += 1;     break;+
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    case 8:     flags += 2;     break;+
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    default:    flags += 3;+
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    }+
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    switch (sizeof(uLong)) {+
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    case 2:     break;+
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    case 4:     flags += 1 << 2;        break;+
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    case 8:     flags += 2 << 2;        break;+
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    default:    flags += 3 << 2;+
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    }+
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    switch (sizeof(voidpf)) {+
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    case 2:     break;+
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    case 4:     flags += 1 << 4;        break;+
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    case 8:     flags += 2 << 4;        break;+
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    default:    flags += 3 << 4;+
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    }+
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    switch (sizeof(z_off_t)) {+
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    case 2:     break;+
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    case 4:     flags += 1 << 6;        break;+
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    case 8:     flags += 2 << 6;        break;+
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    default:    flags += 3 << 6;+
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    }+
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#ifdef DEBUG+
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    flags += 1 << 8;+
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#endif+
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#if defined(ASMV) || defined(ASMINF)+
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    flags += 1 << 9;+
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#endif+
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#ifdef ZLIB_WINAPI+
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    flags += 1 << 10;+
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#endif+
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#ifdef BUILDFIXED+
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    flags += 1 << 12;+
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#endif+
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#ifdef DYNAMIC_CRC_TABLE+
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    flags += 1 << 13;+
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#endif+
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#ifdef NO_GZCOMPRESS+
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    flags += 1L << 16;+
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#endif+
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#ifdef NO_GZIP+
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    flags += 1L << 17;+
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#endif+
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#ifdef PKZIP_BUG_WORKAROUND+
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    flags += 1L << 20;+
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#endif+
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#ifdef FASTEST+
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    flags += 1L << 21;+
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#endif+
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#ifdef STDC+
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#  ifdef NO_vsnprintf+
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        flags += 1L << 25;+
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#    ifdef HAS_vsprintf_void+
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        flags += 1L << 26;+
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#    endif+
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#  else+
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#    ifdef HAS_vsnprintf_void+
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        flags += 1L << 26;+
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#    endif+
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#  endif+
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#else+
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        flags += 1L << 24;+
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#  ifdef NO_snprintf+
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        flags += 1L << 25;+
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#    ifdef HAS_sprintf_void+
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        flags += 1L << 26;+
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#    endif+
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#  else+
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#    ifdef HAS_snprintf_void+
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        flags += 1L << 26;+
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#    endif+
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#  endif+
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#endif+
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    return flags;+
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}+
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+
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#ifdef DEBUG+
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+
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#  ifndef verbose+
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#    define verbose 0+
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#  endif+
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int z_verbose = verbose;+
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+
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void z_error (m)+
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    char *m;+
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{+
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    fprintf(stderr, "%s\n", m);+
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    exit(1);+
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}+
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#endif+
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+
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+
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/* exported to allow conversion of error code to string for compress() and+
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 * uncompress()+
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 */+
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#ifdef __SYMBIAN32__+
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EXPORT_C const char *  zError_r(int err)+
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#else+
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const char * ZEXPORT zError(err)+
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    int err;+
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#endif //__SYMBIAN32__+
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{+
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    return ERR_MSG(err);+
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}+
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+
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+
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#if defined(_WIN32_WCE)+
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    /* The Microsoft C Run-Time Library for Windows CE doesn't have+
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     * errno.  We define it as a global variable to simplify porting.+
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     * Its value is always 0 and should not be used.+
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     */+
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    int errno = 0;+
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#endif+
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+
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#ifndef HAVE_MEMCPY+
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+
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#ifdef __SYMBIAN32__+
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void zmemcpy(    Bytef* dest,const Bytef*  source,uInt  len)+
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#else+
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void zmemcpy(dest, source, len)+
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    Bytef* dest;+
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    const Bytef* source;+
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    uInt  len;+
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#endif //__SYMBIAN32__	+
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{+
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    if (len == 0) return;+
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    do {+
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        *dest++ = *source++; /* ??? to be unrolled */+
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    } while (--len != 0);+
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}+
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+
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#ifdef __SYMBIAN32__+
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int zmemcmp(    const Bytef* s1,    const Bytef*  s2,uInt  len)+
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#else	+
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int zmemcmp(s1, s2, len)+
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    const Bytef* s1;+
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    const Bytef* s2;+
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    uInt  len;+
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#endif //__SYMBIAN32__		+
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{+
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    uInt j;+
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+
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    for (j = 0; j < len; j++) {+
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        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;+
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    }+
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    return 0;+
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}+
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+
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#ifdef __SYMBIAN32__+
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void zmemzero( Bytef* dest,uInt  len)+
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#else	+
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void zmemzero(dest, len)+
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    Bytef* dest;+
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    uInt  len;+
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#endif //__SYMBIAN32__		+
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{+
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    if (len == 0) return;+
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    do {+
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        *dest++ = 0;  /* ??? to be unrolled */+
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    } while (--len != 0);+
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}+
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#endif+
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+
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+
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#ifdef SYS16BIT+
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+
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#ifdef __TURBOC__+
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/* Turbo C in 16-bit mode */+
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+
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#  define MY_ZCALLOC+
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+
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/* Turbo C malloc() does not allow dynamic allocation of 64K bytes+
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 * and farmalloc(64K) returns a pointer with an offset of 8, so we+
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 * must fix the pointer. Warning: the pointer must be put back to its+
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 * original form in order to free it, use zcfree().+
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 */+
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+
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#define MAX_PTR 10+
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/* 10*64K = 640K */+
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+
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local int next_ptr = 0;+
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+
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typedef struct ptr_table_s {+
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    voidpf org_ptr;+
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    voidpf new_ptr;+
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} ptr_table;+
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+
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local ptr_table table[MAX_PTR];+
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/* This table is used to remember the original form of pointers+
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 * to large buffers (64K). Such pointers are normalized with a zero offset.+
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 * Since MSDOS is not a preemptive multitasking OS, this table is not+
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 * protected from concurrent access. This hack doesn't work anyway on+
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 * a protected system like OS/2. Use Microsoft C instead.+
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 */+
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+
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voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)+
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{+
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    voidpf buf = opaque; /* just to make some compilers happy */+
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    ulg bsize = (ulg)items*size;+
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+
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    /* If we allocate less than 65520 bytes, we assume that farmalloc+
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     * will return a usable pointer which doesn't have to be normalized.+
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     */+
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    if (bsize < 65520L) {+
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        buf = farmalloc(bsize);+
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        if (*(ush*)&buf != 0) return buf;+
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    } else {+
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        buf = farmalloc(bsize + 16L);+
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    }+
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    if (buf == NULL || next_ptr >= MAX_PTR) return NULL;+
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    table[next_ptr].org_ptr = buf;+
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+
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    /* Normalize the pointer to seg:0 */+
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    *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;+
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    *(ush*)&buf = 0;+
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    table[next_ptr++].new_ptr = buf;+
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    return buf;+
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}+
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+
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void  zcfree (voidpf opaque, voidpf ptr)+
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{+
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    int n;+
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    if (*(ush*)&ptr != 0) { /* object < 64K */+
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        farfree(ptr);+
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        return;+
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    }+
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    /* Find the original pointer */+
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    for (n = 0; n < next_ptr; n++) {+
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        if (ptr != table[n].new_ptr) continue;+
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+
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        farfree(table[n].org_ptr);+
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        while (++n < next_ptr) {+
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            table[n-1] = table[n];+
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        }+
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        next_ptr--;+
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        return;+
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    }+
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    ptr = opaque; /* just to make some compilers happy */+
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    Assert(0, "zcfree: ptr not found");+
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}+
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+
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#endif /* __TURBOC__ */+
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+
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+
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#ifdef M_I86+
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/* Microsoft C in 16-bit mode */+
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+
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#  define MY_ZCALLOC+
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+
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#if (!defined(_MSC_VER) || (_MSC_VER <= 600))+
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#  define _halloc  halloc+
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#  define _hfree   hfree+
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#endif+
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+
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voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)+
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{+
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    if (opaque) opaque = 0; /* to make compiler happy */+
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    return _halloc((long)items, size);+
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}+
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+
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void  zcfree (voidpf opaque, voidpf ptr)+
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{+
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    if (opaque) opaque = 0; /* to make compiler happy */+
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    _hfree(ptr);+
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}+
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+
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#endif /* M_I86 */+
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+
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#endif /* SYS16BIT */+
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+
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+
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+
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#ifndef MY_ZCALLOC /* Any system without a special alloc function */+
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+
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#ifndef STDC+
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extern voidp  malloc OF((uInt size));+
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extern voidp  calloc OF((uInt items, uInt size));+
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extern void   free   OF((voidpf ptr));+
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#endif+
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+
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#ifdef __SYMBIAN32__+
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voidpf zcalloc (voidpf opaque,unsigned  items, unsigned size)+
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#else 	+
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voidpf zcalloc (opaque, items, size)+
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    voidpf opaque;+
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    unsigned items;+
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    unsigned size;+
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#endif //__SYMBIAN32__	+
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{+
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    if (opaque) items += size - size; /* make compiler happy */+
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#ifndef SYMBIAN_EZLIB_DEVICE+
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  return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) : (voidpf)calloc(items, size);+
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#else+
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	TInt bytes = items*size;+
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	TAny *ptr = User::AllocZ(bytes); // Symbian Native memory allocation API+
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	return (voidpf) ptr;+
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#endif //SYMBIAN_EZLIB_DEVICE+
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}+
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+
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#ifdef __SYMBIAN32__+
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void  zcfree (voidpf opaque,voidpf  ptr)+
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#else 	+
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void  zcfree (opaque, ptr)+
−
    voidpf opaque;+
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    voidpf ptr;+
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#endif //__SYMBIAN32__	+
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{+
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#ifndef SYMBIAN_EZLIB_DEVICE+
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  free(ptr);+
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#else+
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	User::Free(ptr); // Symbian Native memory deallocation API+
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#endif //SYMBIAN_EZLIB_DEVICE+
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    if (opaque) return; /* make compiler happy */+
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}+
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+
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#endif /* MY_ZCALLOC */+
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+
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+
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