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Signed get/set functions for native currency values.

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This commit is contained in:
JoelKatz
2012-05-27 18:29:55 -07:00
parent 959fa8e298
commit 02fd3e2f7a
2 changed files with 28 additions and 4 deletions
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28
src/Amount.cpp
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@@ -272,6 +272,28 @@ STAmount* STAmount::construct(SerializerIterator& sit, const char *name)
return new STAmount(name, currency, value, offset, isNegative);
}
int64 STAmount::getSNValue() const
{ // signed native value
if (!mIsNative) throw std::runtime_error("not native");
if (mIsNegative) return -mValue;
return mValue;
}
void STAmount::setSNValue(int64 v)
{
if (!mIsNative) throw std::runtime_error("not native");
if (v > 0)
{
mIsNegative = false;
mValue = v;
}
else
{
mIsNegative = true;
mValue = -v;
}
}
std::string STAmount::getRaw() const
{ // show raw internal form
if (mValue == 0) return "0";
@@ -771,7 +793,7 @@ STAmount getNeeded(const STAmount& offerOut, const STAmount& offerIn, const STAm
return (ret > offerIn) ? offerIn : ret;
}
static uint64_t muldiv(uint64_t a, uint64_t b, uint64_t c)
static uint64 muldiv(uint64 a, uint64 b, uint64 c)
{ // computes (a*b)/c rounding up - supports values up to 10^18
if (c == 0) throw std::runtime_error("underflow");
if ((a == 0) || (b == 0)) return 0;
@@ -784,12 +806,12 @@ static uint64_t muldiv(uint64_t a, uint64_t b, uint64_t c)
return v.getulong();
}
uint64 convertToDisplayAmount(const STAmount& internalAmount, uint64_t totalNow, uint64_t totalInit)
uint64 convertToDisplayAmount(const STAmount& internalAmount, uint64 totalNow, uint64 totalInit)
{ // Convert an internal ledger/account quantity of native currency to a display amount
return muldiv(internalAmount.getNValue(), totalInit, totalNow);
}
STAmount convertToInternalAmount(uint64_t displayAmount, uint64_t totalNow, uint64_t totalInit,
STAmount convertToInternalAmount(uint64 displayAmount, uint64 totalNow, uint64 totalInit,
const char *name)
{ // Convert a display/request currency amount to an internal amount
return STAmount(name, muldiv(displayAmount, totalNow, totalInit));