sistypes.cpp

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/*
 * This file is part of plptools.
 *
 *  Copyright (C) 2002 Daniel Brahneborg <basic.chello@se>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
#include "config.h"
 
#include "sistypes.h"
 
static unsigned int s_crcTable[256];
 
int logLevel = 0;
 
void createCRCTable()
{
    const unsigned int polynomial = 0x1021;
    unsigned int index;
    s_crcTable[0] = 0;
    for (index = 0; index < 128; index++)
        {
        unsigned int carry = s_crcTable[index] & 0x8000;
        unsigned int temp = (s_crcTable[index] << 1) & 0xffff;
        s_crcTable[index * 2 + (carry ? 0 : 1)] = temp ^ polynomial;
        s_crcTable[index * 2 + (carry ? 1 : 0)] = temp;
        }
}
 
uint16_t updateCrc(uint16_t crc, uint8_t value)
{
    return (crc << 8) ^ s_crcTable[((crc >> 8) ^ value) & 0xff];
}
 
uint16_t calcCRC(uint8_t* data, int len)
{
    uint16_t crc = 0;
    for (int i = 0; i < len; ++i)
        {
        uint8_t value = data[i];
        crc = (crc << 8) ^ s_crcTable[((crc >> 8) ^ value) & 0xff];
        }
    return crc;
}
 
uint16_t read16(uint8_t* p)
{
    return p[0] | (p[1] << 8);
}
 
uint32_t read32(uint8_t* p)
{
    return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
 
void write16(uint8_t* p, int val)
{
    p[0] = val & 255;
    p[1] = (val >> 8) & 255;
}
 
LangTableEntry langTable[] =
{
    { 0, "", "Test" },
    { 1, "EN", "UK English" },
    { 2, "FR", "French" },
    { 3, "GE", "German" },
    { 4, "SP", "Spanish" },
    { 5, "IT", "Italian" },
    { 6, "SW", "Swedish" },
    { 7, "DA", "Danish" },
    { 8, "NO", "Norwegian" },
    { 9, "FI", "Finnish" },
    { 10, "AM", "American English" },
    { 11, "SF", "Swiss French" },
    { 12, "SG", "Swiss German" },
    { 13, "PO", "Portuguese" },
    { 14, "TU", "Turkish" },
    { 15, "IC", "Icelandic" },
    { 16, "RU", "Russian" },
    { 17, "HU", "Hungarian" },
    { 18, "DU", "Dutch" },
    { 19, "BL", "Belgian Flemish" },
    { 20, "AU", "Australian English" },
    { 21, "BG", "Belgian French" },
    { 22, "AS", "Austrian German" },
    { 23, "NZ", "New Zealand" },
    { 24, "IF", "International French" },
    { 25, "CS", "Czech" },
    { 26, "SK", "Slovak" },
    { 27, "PL", "Polish" },
    { 28, "SL", "Slovenian" },
    { 29, "TC", "Taiwan Chinese" },
    { 30, "HK", "Hong Kong" },
    { 31, "ZH", "PRC Chinese" },
    { 32, "JA", "Japanese" },
    { 33, "TH", "Thai" },
};