1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/as_crc.cpp Fri Nov 28 11:21:08 2008 +0100
1.3 @@ -0,0 +1,148 @@
1.4 +//
1.5 +// OSSP asgui - Accounting system graphical user interface
1.6 +// Copyright (c) 2002-2004 The OSSP Project (http://www.ossp.org/)
1.7 +// Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>
1.8 +// Copyright (c) 2002-2004 Michael Schloh von Bennewitz <michael@schloh.com>
1.9 +// Copyright (c) 2002-2004 Cable & Wireless Telecommunications Services GmbH
1.10 +//
1.11 +// This file is part of OSSP asgui, an accounting system graphical user
1.12 +// interface which can be found at http://www.ossp.org/pkg/tool/asgui/.
1.13 +//
1.14 +// Permission to use, copy, modify, and distribute this software for
1.15 +// any purpose with or without fee is hereby granted, provided that
1.16 +// the above copyright notice and this permission notice appear in all
1.17 +// copies.
1.18 +//
1.19 +// THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
1.20 +// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
1.21 +// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1.22 +// IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
1.23 +// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.24 +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
1.25 +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
1.26 +// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
1.27 +// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
1.28 +// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
1.29 +// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.30 +// SUCH DAMAGE.
1.31 +//
1.32 +// as_crc.cpp: ISO C++ implementation
1.33 +//
1.34 +
1.35 +#include "as_crc.h"
1.36 +
1.37 +
1.38 +//
1.39 +// Calculate a CRC32 value, as devised by Mark ADLER
1.40 +// Returns 0xffffffff on empty or zero length strings
1.41 +//
1.42 +U32 Qualistring::getCrc(void)
1.43 +{
1.44 + U32 Hash = 0xffffffff;
1.45 + unsigned int unLen = 0;
1.46 + const char *pText = this->ascii();
1.47 +
1.48 + unLen = this->length();
1.49 +
1.50 + while (unLen-- > 0)
1.51 + Hash = m_pkHash[(Hash ^ *pText++) & 0xff] ^ (Hash >> 8);
1.52 +
1.53 + Hash ^= 0xffffffff;
1.54 + return Hash;
1.55 +}
1.56 +
1.57 +//
1.58 +// Overloaded equals operator, use with regular QString objects
1.59 +//
1.60 +Qualistring &Qualistring::operator=(const QString &Convertin)
1.61 +{
1.62 + this->setAscii((const char *)Convertin); // This hack is a big loop
1.63 + return *this; // to move data inefficiently
1.64 +}
1.65 +
1.66 +//
1.67 +// Reflect the bits of Ref, just like a mirror
1.68 +//
1.69 +U32 Qualistring::mirrorBits(U32 Ref, U8 Bytes)
1.70 +{
1.71 + U32 unMirror = 0;
1.72 +
1.73 + // Swap bits starting at 1 and moving up to Bytes
1.74 + for(int nIter = 1; nIter < (Bytes + 1); nIter++) {
1.75 + if (Ref & 1)
1.76 + unMirror |= 1 << (Bytes - nIter);
1.77 + Ref >>= 1;
1.78 + }
1.79 + return unMirror;
1.80 +}
1.81 +
1.82 +//
1.83 +// Initialize the hash table for fast CRC32 value generation
1.84 +//
1.85 +void Qualistring::initCrc(void)
1.86 +{
1.87 + const unsigned long unPolynomial = 0x04c11db7;
1.88 +
1.89 + // Match 256 values representing the ASCII character codes
1.90 + for(int nOuter = 0; nOuter <= 0xFF; nOuter++) {
1.91 + m_pkHash[nOuter] = mirrorBits(nOuter, 8) << 24;
1.92 + for (int nInner = 0; nInner < 8; nInner++)
1.93 + m_pkHash[nOuter] = (m_pkHash[nOuter] << 1) ^ (m_pkHash[nOuter] & (1 << 31) ? unPolynomial : 0);
1.94 + m_pkHash[nOuter] = mirrorBits(m_pkHash[nOuter], 32);
1.95 + }
1.96 +
1.97 +/* m_pkHash[256] = {
1.98 + 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
1.99 + 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
1.100 + 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
1.101 + 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
1.102 + 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
1.103 + 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
1.104 + 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
1.105 + 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
1.106 + 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
1.107 + 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
1.108 + 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
1.109 + 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
1.110 + 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
1.111 + 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
1.112 + 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
1.113 + 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
1.114 + 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
1.115 + 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
1.116 + 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
1.117 + 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
1.118 + 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
1.119 + 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
1.120 + 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
1.121 + 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
1.122 + 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
1.123 + 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
1.124 + 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
1.125 + 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
1.126 + 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
1.127 + 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
1.128 + 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
1.129 + 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
1.130 + 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
1.131 + 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
1.132 + 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
1.133 + 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
1.134 + 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
1.135 + 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
1.136 + 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
1.137 + 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
1.138 + 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
1.139 + 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
1.140 + 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
1.141 + 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
1.142 + 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
1.143 + 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
1.144 + 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
1.145 + 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
1.146 + 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
1.147 + 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
1.148 + 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
1.149 + 0x2d02ef8dL
1.150 + };*/
1.151 +}
