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-rw-r--r--src/qt/bitcoinunits.cpp30
1 files changed, 23 insertions, 7 deletions
diff --git a/src/qt/bitcoinunits.cpp b/src/qt/bitcoinunits.cpp
index 7cd50232dd..9a9a4890dc 100644
--- a/src/qt/bitcoinunits.cpp
+++ b/src/qt/bitcoinunits.cpp
@@ -119,17 +119,33 @@ QString BitcoinUnits::formatWithUnit(int unit, qint64 amount, bool plussign)
bool BitcoinUnits::parse(int unit, const QString &value, qint64 *val_out)
{
- if(!valid(unit))
- return false; // Refuse to parse invalid unit
+ if(!valid(unit) || value.isEmpty())
+ return false; // Refuse to parse invalid unit or empty string
int num_decimals = decimals(unit);
QStringList parts = value.split(".");
- if(parts.size() != 2 || parts.at(1).size() > num_decimals)
- return false; // Max num decimals
+
+ if(parts.size() > 2)
+ {
+ return false; // More than one dot
+ }
+ QString whole = parts[0];
+ QString decimals;
+
+ if(parts.size() > 1)
+ {
+ decimals = parts[1];
+ }
+ if(decimals.size() > num_decimals)
+ {
+ return false; // Exceeds max precision
+ }
bool ok = false;
- QString str = parts[0] + parts[1].leftJustified(num_decimals, '0');
- if(str.size()>18)
- return false; // Bounds check
+ QString str = whole + decimals.leftJustified(num_decimals, '0');
+ if(str.size() > 18)
+ {
+ return false; // Longer numbers will exceed 63 bits
+ }
qint64 retvalue = str.toLongLong(&ok);
if(val_out)
{