97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
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#include "bitcoinunits.h"
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#include <QStringList>
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QString BitcoinUnits::name(BitcoinUnits::Unit unit)
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{
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switch(unit)
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{
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case BTC: return "BTC";
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case mBTC: return "mBTC";
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case uBTC: return "uBTC";
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default: return "???";
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}
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}
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QString BitcoinUnits::description(BitcoinUnits::Unit unit)
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{
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switch(unit)
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{
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case BTC: return "Bitcoin";
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case mBTC: return "Milli-bitcoin";
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case uBTC: return "Micro-bitcoin";
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default: return "???";
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}
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}
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qint64 BitcoinUnits::factor(BitcoinUnits::Unit unit)
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{
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switch(unit)
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{
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case BTC: return 100000000;
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case mBTC: return 100000;
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case uBTC: return 100;
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default: return 100000000;
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}
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}
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int BitcoinUnits::decimals(BitcoinUnits::Unit unit)
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{
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switch(unit)
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{
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case BTC: return 8;
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case mBTC: return 5;
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case uBTC: return 2;
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default: return 0;
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}
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}
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QString BitcoinUnits::format(BitcoinUnits::Unit unit, qint64 n, bool fPlus)
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{
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// Note: not using straight sprintf here because we do NOT want
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// localized number formatting.
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qint64 coin = factor(unit);
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int num_decimals = decimals(unit);
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qint64 n_abs = (n > 0 ? n : -n);
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qint64 quotient = n_abs / coin;
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qint64 remainder = n_abs % coin;
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QString quotient_str = QString::number(quotient);
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QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
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// Right-trim excess 0's after the decimal point
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int nTrim = 0;
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for (int i = remainder_str.size()-1; i>=2 && (remainder_str.at(i) == '0'); --i)
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++nTrim;
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remainder_str.chop(nTrim);
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if (n < 0)
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quotient_str.insert(0, '-');
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else if (fPlus && n > 0)
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quotient_str.insert(0, '+');
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return quotient_str + QString(".") + remainder_str;
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}
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QString BitcoinUnits::formatWithUnit(BitcoinUnits::Unit unit, qint64 amount, bool plussign)
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{
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return format(unit, amount, plussign) + QString(" ") + name(unit);
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}
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bool BitcoinUnits::parse(BitcoinUnits::Unit unit, const QString &value, qint64 *val_out)
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{
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int num_decimals = decimals(unit);
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QStringList parts = value.split(".");
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if(parts.size() != 2 || parts.at(1).size() > num_decimals)
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return false; // Max num decimals
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bool ok = false;
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QString str = parts[0] + parts[1].leftJustified(num_decimals, '0');
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if(str.size()>18)
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return false; // Bounds check
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qint64 retvalue = str.toLongLong(&ok);
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if(val_out)
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{
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*val_out = retvalue;
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}
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return ok;
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}
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