bytechange.cpp

#include "bytechange.h"

//16进制转换函数
QByteArray QString2Hex(QString str)
{
    QByteArray senddata;
    int hexdata,lowhexdata;
    int hexdatalen = 0;
    int len = str.length();
    senddata.resize(len/2);
    char lstr,hstr;
    for(int i=0; i<len; )
    {
        hstr=str[i].toLatin1();
        if(hstr == ' ')
        {
            i++;
            continue;
        }
        i++;
        if(i >= len)
            break;
        lstr = str[i].toLatin1();
        hexdata = ConvertHexChar(hstr);
        lowhexdata = ConvertHexChar(lstr);
        if((hexdata == 16) || (lowhexdata == 16))
            break;
        else
            hexdata = hexdata*16+lowhexdata;
        i++;
        senddata[hexdatalen] = (char)hexdata;
        hexdatalen++;
    }
    senddata.resize(hexdatalen);
    return senddata;
}
QString hexToString(QByteArray in)
{
    int i;
    int len = in.size();
    unsigned char inChar,hi,lo;
    QString s;

    for (i=0; i<len; i++)
    {
        inChar = in.at(i);

        hi = (inChar & 0xF0) >> 4;
        if (hi > 9)
            hi = 'A' + (hi - 0x0A);
        else
            hi += 0x30;
        s.append(hi);

        lo = inChar & 0x0F;
        if (lo > 9)
            lo = 'A' + (lo - 0x0A);
        else
            lo += 0x30;
        s.append(lo);

        s.append(0x20);
    }

    return s;
}
char ConvertHexChar(char ch)
{
    if((ch >= '0') && (ch <= '9'))
        return ch-0x30;
    else if((ch >= 'A') && (ch <= 'F'))
        return ch-'A'+10;
    else if((ch >= 'a') && (ch <= 'f'))
        return ch-'a'+10;
    else return (-1);
}