82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
/**
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* (C) 2018 Jordan Sherer <kn4crd@gmail.com> - All Rights Reserved
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**/
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#include "varicode.h"
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const int nalphabet = 41;
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QString alphabet = {"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ+-./?"};
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QVector<bool> Varicode::intToBits(qint64 value, int expected){
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QVector<bool> bits;
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while(value){
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bits.prepend((bool) value & 1);
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value = value >> 1;
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}
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if(expected){
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while(bits.count() < expected){
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bits.prepend((bool) 0);
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}
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}
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return bits;
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}
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qint64 Varicode::bitsToInt(QVector<bool> const value){
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qint64 v = 0;
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foreach(bool bit, value){
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v = (v << 1) + (int)(bit);
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}
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return v;
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}
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qint8 Varicode::unpack5bits(QString const& value){
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return alphabet.indexOf(value.at(0));
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}
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QString Varicode::pack5bits(qint8 packed){
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return alphabet.at(packed % nalphabet);
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}
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qint16 Varicode::unpack16bits(QString const& value){
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int a = alphabet.indexOf(value.at(0));
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int b = alphabet.indexOf(value.at(1));
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int c = alphabet.indexOf(value.at(2));
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return (nalphabet*nalphabet) * a + nalphabet*b + c;
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}
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QString Varicode::pack16bits(qint16 packed){
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QString out;
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qint16 tmp = packed / (nalphabet*nalphabet);
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out.append(alphabet.at(tmp));
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tmp = (packed - (tmp * (nalphabet*nalphabet))) / nalphabet;
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out.append(alphabet.at(tmp));
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tmp = packed % nalphabet;
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out.append(alphabet.at(tmp));
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return out;
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}
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qint32 Varicode::unpack32bits(QString const& value){
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return unpack16bits(value.left(3)) << 16 | unpack16bits(value.right(3));
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}
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QString Varicode::pack32bits(qint32 packed){
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qint16 a = (packed & 0xFFFF0000) >> 16;
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qint16 b = packed & 0xFFFF;
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return pack16bits(a) + pack16bits(b);
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}
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qint64 Varicode::unpack64bits(QString const& value){
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return unpack16bits(value.left(6)) << 32 | unpack16bits(value.right(6));
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}
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QString Varicode::pack64bits(qint64 packed){
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qint32 a = (packed & 0xFFFFFFFF00000000) >> 32;
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qint32 b = packed & 0xFFFFFFFF;
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}
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