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-rw-r--r--src/qt/bitcoinunits.cpp96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/qt/bitcoinunits.cpp b/src/qt/bitcoinunits.cpp
new file mode 100644
index 0000000000..ff30563f97
--- /dev/null
+++ b/src/qt/bitcoinunits.cpp
@@ -0,0 +1,96 @@
+#include "bitcoinunits.h"
+
+#include <QStringList>
+
+QString BitcoinUnits::name(BitcoinUnits::Unit unit)
+{
+ switch(unit)
+ {
+ case BTC: return "BTC";
+ case mBTC: return "mBTC";
+ case uBTC: return "uBTC";
+ default: return "???";
+ }
+}
+
+QString BitcoinUnits::description(BitcoinUnits::Unit unit)
+{
+ switch(unit)
+ {
+ case BTC: return "Bitcoin";
+ case mBTC: return "Milli-bitcoin";
+ case uBTC: return "Micro-bitcoin";
+ default: return "???";
+ }
+}
+
+qint64 BitcoinUnits::factor(BitcoinUnits::Unit unit)
+{
+ switch(unit)
+ {
+ case BTC: return 100000000;
+ case mBTC: return 100000;
+ case uBTC: return 100;
+ default: return 100000000;
+ }
+}
+
+int BitcoinUnits::decimals(BitcoinUnits::Unit unit)
+{
+ switch(unit)
+ {
+ case BTC: return 8;
+ case mBTC: return 5;
+ case uBTC: return 2;
+ default: return 0;
+ }
+}
+
+QString BitcoinUnits::format(BitcoinUnits::Unit unit, qint64 n, bool fPlus)
+{
+ // Note: not using straight sprintf here because we do NOT want
+ // localized number formatting.
+ qint64 coin = factor(unit);
+ int num_decimals = decimals(unit);
+ qint64 n_abs = (n > 0 ? n : -n);
+ qint64 quotient = n_abs / coin;
+ qint64 remainder = n_abs % coin;
+ QString quotient_str = QString::number(quotient);
+ QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
+
+ // Right-trim excess 0's after the decimal point
+ int nTrim = 0;
+ for (int i = remainder_str.size()-1; i>=2 && (remainder_str.at(i) == '0'); --i)
+ ++nTrim;
+ remainder_str.chop(nTrim);
+
+ if (n < 0)
+ quotient_str.insert(0, '-');
+ else if (fPlus && n > 0)
+ quotient_str.insert(0, '+');
+ return quotient_str + QString(".") + remainder_str;
+}
+
+QString BitcoinUnits::formatWithUnit(BitcoinUnits::Unit unit, qint64 amount, bool plussign)
+{
+ return format(unit, amount, plussign) + QString(" ") + name(unit);
+}
+
+bool BitcoinUnits::parse(BitcoinUnits::Unit unit, const QString &value, qint64 *val_out)
+{
+ int num_decimals = decimals(unit);
+ QStringList parts = value.split(".");
+ if(parts.size() != 2 || parts.at(1).size() > num_decimals)
+ return false; // Max num decimals
+ bool ok = false;
+ QString str = parts[0] + parts[1].leftJustified(num_decimals, '0');
+ if(str.size()>18)
+ return false; // Bounds check
+
+ qint64 retvalue = str.toLongLong(&ok);
+ if(val_out)
+ {
+ *val_out = retvalue;
+ }
+ return ok;
+}