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Huge amount rewrite to support all currency types.

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This commit is contained in:
JoelKatz
2012-05-17 23:45:13 -07:00
parent 5fcc6ba88b
commit 7019a46db1
2 changed files with 372 additions and 113 deletions
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422
src/Amount.cpp
View File

@@ -13,69 +13,124 @@
void STAmount::canonicalize()
{
if (value == 0)
if (!mCurrency)
{
offset = -100;
mIsNative = true;
if (mValue == 0)
{
mOffset = 0;
return;
}
while (mOffset < 0)
{
mValue /= 10;
++mOffset;
}
while (mOffset > 0)
{
mValue *= 10;
--mOffset;
}
assert(mValue <= cMaxNative);
return;
}
while (value < cMinValue)
mIsNative = false;
if (mValue == 0)
{
if (offset <= cMinOffset)
mOffset = -100;
return;
}
while (mValue < cMinValue)
{
if (mOffset <= cMinOffset)
throw std::runtime_error("value overflow");
value *= 10;
--offset;
mValue *= 10;
--mOffset;
}
while (value > cMaxValue)
while (mValue > cMaxValue)
{
if (offset >= cMaxOffset)
if (mOffset >= cMaxOffset)
throw std::runtime_error("value underflow");
value /= 10;
++offset;
mValue /= 10;
++mOffset;
}
assert( (value == 0) || ( (value >= cMinValue) && (value <= cMaxValue) ) );
assert( (value == 0) || ( (offset >= cMinOffset) && (offset <= cMaxOffset) ) );
assert( (value != 0) || (offset != -100) );
assert((mValue == 0) || ((mValue >= cMinValue) && (mValue <= cMaxValue)) );
assert((mValue == 0) || ((mOffset >= cMinOffset) && (mOffset <= cMaxOffset)) );
assert((mValue != 0) || (mOffset != -100) );
}
void STAmount::add(Serializer& s) const
{
if (mIsNative)
{
assert(mOffset == 0);
s.add64(mValue);
return;
}
if (isZero())
s.add64(cNotNative);
else
s.add64(mValue + (static_cast<uint64>(mOffset + 396) << (64 - 9)));
s.add160(mCurrency);
}
STAmount* STAmount::construct(SerializerIterator& sit, const char *name)
{
uint64 value = sit.get64();
int offset = static_cast<int>(value >> (64-8));
value &= ~(255ull << (64-8));
if ((value & cNotNative) == 0)
return new STAmount(name, value);
uint160 currency = sit.get160();
if (!currency)
throw std::runtime_error("invalid native currency");
int offset = static_cast<int>(value >> (64-9));
value &= ~(1023ull << (64-9));
if (value == 0)
{
if (offset != 0)
if (offset != 256)
throw std::runtime_error("invalid currency value");
}
else
{
offset -= 142; // center the range
if ( (value < cMinValue) || (value > cMaxValue) || (offset < cMinOffset) || (offset > cMaxOffset) )
offset -= 396; // center the range and set the "not native" bit
if ((value < cMinValue) || (value > cMaxValue) || (offset < cMinOffset) || (offset > cMaxOffset))
throw std::runtime_error("invalid currency value");
}
return new STAmount(name, value, offset);
return new STAmount(name, currency, value, offset);
}
std::string STAmount::getRaw() const
{ // show raw internal form
if (isZero()) return "0";
return boost::lexical_cast<std::string>(value) + "e" + boost::lexical_cast<std::string>(offset);
if (mValue == 0) return "0";
if (mIsNative) return boost::lexical_cast<std::string>(mValue);
return mCurrency.GetHex() + ": " +
boost::lexical_cast<std::string>(mValue) + "e" + boost::lexical_cast<std::string>(mOffset);
}
std::string STAmount::getText() const
{ // keep full internal accuracy, but make more human friendly if posible
if (isZero()) return "0";
if ( (offset < -25) || (offset > -5) )
return boost::lexical_cast<std::string>(value) + "e" + boost::lexical_cast<std::string>(offset);
if (mIsNative)
return boost::lexical_cast<std::string>(mValue);
if ((mOffset < -25) || (mOffset > -5))
return boost::lexical_cast<std::string>(mValue) + "e" + boost::lexical_cast<std::string>(mOffset);
std::string val = "000000000000000000000000000";
val += boost::lexical_cast<std::string>(value);
val += boost::lexical_cast<std::string>(mValue);
val += "00000000000000000000000";
std::string pre = val.substr(0, offset+43);
std::string post = val.substr(offset+43);
std::string pre = val.substr(0, mOffset + 43);
std::string post = val.substr(mOffset + 43);
size_t s_pre = pre.find_first_not_of('0');
if (s_pre == std::string::npos)
@@ -90,57 +145,66 @@ std::string STAmount::getText() const
return pre + "." + post.substr(0, s_post+1);
}
void STAmount::add(Serializer& s) const
bool STAmount::isComparable(const STAmount& t) const
{
if (isZero())
s.add64(0);
else
s.add64(value + (static_cast<uint64>(offset + 142) << (64 - 8)));
if (mIsNative) return t.mIsNative;
if (t.mIsNative) return false;
return mCurrency == t.mCurrency;
}
bool STAmount::isEquivalent(const SerializedType& t) const
{
const STAmount* v = dynamic_cast<const STAmount*>(&t);
if (!v) return false;
return (value == v->value) && (offset == v->offset);
return isComparable(*v) && (mValue == v->mValue) && (mOffset == v->mOffset);
}
void STAmount::throwComparable(const STAmount& t) const
{
if (!isComparable(t))
throw std::runtime_error("amounts are not comparable");
}
bool STAmount::operator==(const STAmount& a) const
{
return (offset == a.offset) && (value == a.value);
return isComparable(a) && (mOffset == a.mOffset) && (mValue == a.mValue);
}
bool STAmount::operator!=(const STAmount& a) const
{
return (offset != a.offset) || (value != a.value);
return (mOffset != a.mOffset) || (mValue != a.mValue) || !isComparable(a);
}
bool STAmount::operator<(const STAmount& a) const
{
if (offset < a.offset) return true;
if (a.offset < offset) return false;
return value < a.value;
throwComparable(a);
if (mOffset < a.mOffset) return true;
if (a.mOffset < mOffset) return false;
return mValue < a.mValue;
}
bool STAmount::operator>(const STAmount& a) const
{
if (offset > a.offset) return true;
if (a.offset > offset) return false;
return value > a.value;
throwComparable(a);
if (mOffset > a.mOffset) return true;
if (a.mOffset > mOffset) return false;
return mValue > a.mValue;
}
bool STAmount::operator<=(const STAmount& a) const
{
if (offset < a.offset) return true;
if (a.offset < offset) return false;
return value <= a.value;
throwComparable(a);
if (mOffset < a.mOffset) return true;
if (a.mOffset < mOffset) return false;
return mValue <= a.mValue;
}
bool STAmount::operator>=(const STAmount& a) const
{
if (offset > a.offset) return true;
if (a.offset > offset) return false;
return value >= a.value;
throwComparable(a);
if (mOffset > a.mOffset) return true;
if (a.mOffset > mOffset) return false;
return mValue >= a.mValue;
}
STAmount& STAmount::operator+=(const STAmount& a)
@@ -157,112 +221,191 @@ STAmount& STAmount::operator-=(const STAmount& a)
STAmount& STAmount::operator=(const STAmount& a)
{
value = a.value;
offset = a.offset;
mValue = a.mValue;
mOffset = a.mOffset;
mCurrency = a.mCurrency;
mIsNative = a.mIsNative;
return *this;
}
STAmount& STAmount::operator=(uint64 v)
{ // does not copy name
return *this = STAmount(v, 0);
mOffset = 0;
mValue = v;
if (!mIsNative) canonicalize();
return *this;
}
STAmount& STAmount::operator+=(uint64 v)
{
return *this += STAmount(v);
if (mIsNative) mValue += v;
*this += STAmount(mCurrency, v);
return *this;
}
STAmount& STAmount::operator-=(uint64 v)
{
return *this -= STAmount(v);
if (mIsNative)
{
if (v > mValue)
throw std::runtime_error("amount underflow");
mValue -= v;
}
*this -= STAmount(mCurrency, v);
return *this;
}
STAmount::operator double() const
{ // Does not keep the precise value. Not recommended
if (!value)
if (!mValue)
return 0.0;
return static_cast<double>(value) * pow(10.0, offset);
return static_cast<double>(mValue) * pow(10.0, mOffset);
}
STAmount operator+(STAmount v1, STAmount v2)
{ // We can check for precision loss here (value%10)!=0
v1.throwComparable(v2);
if (v1.mIsNative)
return STAmount(v1.mValue + v2.mValue);
if (v1.isZero()) return v2;
if (v2.isZero()) return v1;
while (v1.offset < v2.offset)
while (v1.mOffset < v2.mOffset)
{
v1.value /= 10;
++v1.offset;
v1.mValue /= 10;
++v1.mOffset;
}
while (v2.offset < v1.offset)
while (v2.mOffset < v1.mOffset)
{
v2.value /= 10;
++v2.offset;
v2.mValue /= 10;
++v2.mOffset;
}
// this addition cannot overflow
return STAmount(v1.name, v1.value + v2.value, v1.offset);
return STAmount(v1.name, v1.mCurrency, v1.mValue + v2.mValue, v1.mOffset);
}
STAmount operator-(STAmount v1, STAmount v2)
{
if (v2.isZero()) return v1;
if ( v1.isZero() || (v2.offset > v1.offset) )
throw std::runtime_error("value underflow");
while (v1.offset > v2.offset)
v1.throwComparable(v2);
if (v2.mIsNative)
{
v2.value /= 10;
++v2.offset;
if (v2.mValue > v1.mValue)
throw std::runtime_error("amount underflow");
return STAmount(v1.mValue - v2.mValue);
}
if (v1.value < v2.value)
if (v2.isZero()) return v1;
if ( v1.isZero() || (v2.mOffset > v1.mOffset) )
throw std::runtime_error("value underflow");
return STAmount(v1.name, v1.value - v2.value, v1.offset);
while (v1.mOffset > v2.mOffset)
{
v2.mValue /= 10;
++v2.mOffset;
}
if (v1.mValue < v2.mValue)
throw std::runtime_error("value underflow");
return STAmount(v1.name, v1.mCurrency, v1.mValue - v2.mValue, v1.mOffset);
}
STAmount operator/(const STAmount& num, const STAmount& den)
STAmount divide(const STAmount& num, const STAmount& den, const uint160& currencyOut)
{
if (den.isZero()) throw std::runtime_error("division by zero");
if (num.isZero()) return STAmount();
if (num.isZero()) return STAmount(currencyOut);
uint64 numVal = num.mValue, denVal = den.mValue;
int numOffset = num.mOffset, denOffset = den.mOffset;
if (num.mIsNative)
while (numVal < STAmount::cMinValue)
{
numVal *= 10;
--numOffset;
}
if (den.mIsNative)
while (denVal < STAmount::cMinValue)
{
denVal *= 10;
--denOffset;
}
// Compute (numerator * 10^16) / denominator
CBigNum v;
if ((BN_add_word(&v, num.value) != 1) ||
if ((BN_add_word(&v, numVal) != 1) ||
(BN_mul_word(&v, 10000000000000000ull) != 1) ||
(BN_div_word(&v, den.value) == ((BN_ULONG) - 1)))
(BN_div_word(&v, denVal) == ((BN_ULONG) - 1)))
{
throw std::runtime_error("internal bn error");
}
// 10^15 <= quotient <= 10^17
assert(BN_num_bytes(&v) <= 60);
assert(BN_num_bytes(&v) <= 64);
return STAmount(v.getulong(), num.offset - den.offset - 16);
return STAmount(currencyOut, v.getulong(), numOffset - denOffset - 16);
}
STAmount operator*(const STAmount &v1, const STAmount &v2)
STAmount multiply(const STAmount& v1, const STAmount& v2, const uint160& currencyOut)
{
if (v1.isZero() || v2.isZero())
return STAmount();
return STAmount(currencyOut);
if (v1.mIsNative && v2.mIsNative)
return STAmount(currencyOut, v1.mValue * v2.mValue);
uint64 value1 = v1.mValue, value2 = v2.mValue;
int offset1 = v1.mOffset, offset2 = v2.mOffset;
if (v1.mIsNative)
{
while (value1 < STAmount::cMinValue)
{
value1 *= 10;
--offset1;
}
}
else
{
value1 *= 10;
value1 += 3;
--offset1;
}
if (v2.mIsNative)
{
while (value2 < STAmount::cMinValue)
{
value2 *= 10;
--offset2;
}
}
else
{
value2 *= 10;
value2 += 3;
--offset2;
}
// Compute (numerator*10 * denominator*10) / 10^18 with rounding
CBigNum v;
if ((BN_add_word(&v, (v1.value*10) + 3) != 1) ||
(BN_mul_word(&v, (v2.value*10) + 3) != 1) ||
if ((BN_add_word(&v, value1) != 1) ||
(BN_mul_word(&v, value2) != 1) ||
(BN_div_word(&v, 1000000000000000000ull) == ((BN_ULONG) - 1)))
{
throw std::runtime_error("internal bn error");
}
// 10^16 <= product <= 10^18
assert(BN_num_bytes(&v) <= 60);
assert(BN_num_bytes(&v) <= 64);
return STAmount(v.getulong(), v1.offset + v2.offset + 16);
return STAmount(currencyOut, v.getulong(), offset1 + offset2 + 14);
}
STAmount getRate(const STAmount& offerOut, const STAmount& offerIn)
uint64 getRate(const STAmount& offerOut, const STAmount& offerIn)
{
// offerOut = how much comes out of the offer, from the offeror to the taker
// offerIn = how much goes into the offer, from the taker to the offeror
// FIXME
return offerOut / offerIn;
}
@@ -322,20 +465,44 @@ static uint64_t muldiv(uint64_t a, uint64_t b, uint64_t c)
return v.getulong();
}
STAmount convertToDisplayAmount(uint64_t internalAmount, uint64_t totalNow, uint64_t totalInit)
uint64 convertToDisplayAmount(const STAmount& internalAmount, uint64_t totalNow, uint64_t totalInit)
{ // Convert an internal ledger/account quantity of native currency to a display amount
return muldiv(internalAmount, totalInit, totalNow);
if (internalAmount.isNative()) throw std::runtime_error("not native curency");
return muldiv(internalAmount.getValue(), totalInit, totalNow);
}
STAmount convertToInternalAmount(uint64_t displayAmount, uint64_t totalNow, uint64_t totalInit)
STAmount convertToInternalAmount(uint64_t displayAmount, uint64_t totalNow, uint64_t totalInit,
const char *name)
{ // Convert a display/request currency amount to an internal amount
return muldiv(displayAmount, totalNow, totalInit);
return STAmount(name, muldiv(displayAmount, totalNow, totalInit));
}
void STAmount::unitTest()
STAmount STAmount::deSerialize(SerializerIterator& it)
{
STAmount *s = construct(it);
STAmount ret(*s);
delete s;
return ret;
}
static STAmount serdes(const STAmount &s)
{
Serializer ser;
s.add(ser);
SerializerIterator sit(ser);
return STAmount::deSerialize(sit);
}
void STAmount::unitTestNC()
{
STAmount zero, one(1), hundred(100);
if (serdes(zero) != zero) throw std::runtime_error("STAmount fail");
if (serdes(one) != one) throw std::runtime_error("STAmount fail");
if (serdes(hundred) != hundred) throw std::runtime_error("STAmount fail");
if (!zero.isNative()) throw std::runtime_error("STAmount fail");
if (!hundred.isNative()) throw std::runtime_error("STAmount fail");
if (!zero.isZero()) throw std::runtime_error("STAmount fail");
if (one.isZero()) throw std::runtime_error("STAmount fail");
if (hundred.isZero()) throw std::runtime_error("STAmount fail");
@@ -394,8 +561,81 @@ void STAmount::unitTest()
if (!(hundred != one)) throw std::runtime_error("STAmount fail");
if ((hundred != hundred)) throw std::runtime_error("STAmount fail");
if (STAmount().getText() != "0") throw std::runtime_error("STAmount fail");
if (STAmount(31).getText() != "31") throw std::runtime_error("STAmount fail");
if (STAmount(31,1).getText() != "310") throw std::runtime_error("STAmount fail");
if (STAmount(31,-1).getText() != "3.1") throw std::runtime_error("STAmount fail");
if (STAmount(31,-2).getText() != "0.31") throw std::runtime_error("STAmount fail");
if (STAmount(31).getText() != "31") throw std::runtime_error("STAmount fail");
if (STAmount(310).getText() != "310") throw std::runtime_error("STAmount fail");
}
void STAmount::unitTestNNC()
{
uint160 currency(1);
STAmount zero(currency), one(currency, 1), hundred(currency, 100);
if (serdes(zero) != zero) throw std::runtime_error("STAmount fail");
if (serdes(one) != one) throw std::runtime_error("STAmount fail");
if (serdes(hundred) != hundred) throw std::runtime_error("STAmount fail");
if (zero.isNative()) throw std::runtime_error("STAmount fail");
if (hundred.isNative()) throw std::runtime_error("STAmount fail");
if (!zero.isZero()) throw std::runtime_error("STAmount fail");
if (one.isZero()) throw std::runtime_error("STAmount fail");
if (hundred.isZero()) throw std::runtime_error("STAmount fail");
if ((zero < zero)) throw std::runtime_error("STAmount fail");
if (!(zero < one)) throw std::runtime_error("STAmount fail");
if (!(zero < hundred)) throw std::runtime_error("STAmount fail");
if ((one < zero)) throw std::runtime_error("STAmount fail");
if ((one < one)) throw std::runtime_error("STAmount fail");
if (!(one < hundred)) throw std::runtime_error("STAmount fail");
if ((hundred < zero)) throw std::runtime_error("STAmount fail");
if ((hundred < one)) throw std::runtime_error("STAmount fail");
if ((hundred < hundred)) throw std::runtime_error("STAmount fail");
if ((zero > zero)) throw std::runtime_error("STAmount fail");
if ((zero > one)) throw std::runtime_error("STAmount fail");
if ((zero > hundred)) throw std::runtime_error("STAmount fail");
if (!(one > zero)) throw std::runtime_error("STAmount fail");
if ((one > one)) throw std::runtime_error("STAmount fail");
if ((one > hundred)) throw std::runtime_error("STAmount fail");
if (!(hundred > zero)) throw std::runtime_error("STAmount fail");
if (!(hundred > one)) throw std::runtime_error("STAmount fail");
if ((hundred > hundred)) throw std::runtime_error("STAmount fail");
if (!(zero <= zero)) throw std::runtime_error("STAmount fail");
if (!(zero <= one)) throw std::runtime_error("STAmount fail");
if (!(zero <= hundred)) throw std::runtime_error("STAmount fail");
if ((one <= zero)) throw std::runtime_error("STAmount fail");
if (!(one <= one)) throw std::runtime_error("STAmount fail");
if (!(one <= hundred)) throw std::runtime_error("STAmount fail");
if ((hundred <= zero)) throw std::runtime_error("STAmount fail");
if ((hundred <= one)) throw std::runtime_error("STAmount fail");
if (!(hundred <= hundred)) throw std::runtime_error("STAmount fail");
if (!(zero >= zero)) throw std::runtime_error("STAmount fail");
if ((zero >= one)) throw std::runtime_error("STAmount fail");
if ((zero >= hundred)) throw std::runtime_error("STAmount fail");
if (!(one >= zero)) throw std::runtime_error("STAmount fail");
if (!(one >= one)) throw std::runtime_error("STAmount fail");
if ((one >= hundred)) throw std::runtime_error("STAmount fail");
if (!(hundred >= zero)) throw std::runtime_error("STAmount fail");
if (!(hundred >= one)) throw std::runtime_error("STAmount fail");
if (!(hundred >= hundred)) throw std::runtime_error("STAmount fail");
if (!(zero == zero)) throw std::runtime_error("STAmount fail");
if ((zero == one)) throw std::runtime_error("STAmount fail");
if ((zero == hundred)) throw std::runtime_error("STAmount fail");
if ((one == zero)) throw std::runtime_error("STAmount fail");
if (!(one == one)) throw std::runtime_error("STAmount fail");
if ((one == hundred)) throw std::runtime_error("STAmount fail");
if ((hundred == zero)) throw std::runtime_error("STAmount fail");
if ((hundred == one)) throw std::runtime_error("STAmount fail");
if (!(hundred == hundred)) throw std::runtime_error("STAmount fail");
if ((zero != zero)) throw std::runtime_error("STAmount fail");
if (!(zero != one)) throw std::runtime_error("STAmount fail");
if (!(zero != hundred)) throw std::runtime_error("STAmount fail");
if (!(one != zero)) throw std::runtime_error("STAmount fail");
if ((one != one)) throw std::runtime_error("STAmount fail");
if (!(one != hundred)) throw std::runtime_error("STAmount fail");
if (!(hundred != zero)) throw std::runtime_error("STAmount fail");
if (!(hundred != one)) throw std::runtime_error("STAmount fail");
if ((hundred != hundred)) throw std::runtime_error("STAmount fail");
if (STAmount(currency).getText() != "0") throw std::runtime_error("STAmount fail");
if (STAmount(currency,31).getText() != "31") throw std::runtime_error("STAmount fail");
if (STAmount(currency,31,1).getText() != "310") throw std::runtime_error("STAmount fail");
if (STAmount(currency,31,-1).getText() != "3.1") throw std::runtime_error("STAmount fail");
if (STAmount(currency,31,-2).getText() != "0.31") throw std::runtime_error("STAmount fail");
}

63
src/SerializedTypes.h
View File

@@ -188,34 +188,49 @@ class STAmount : public SerializedType
// Low 56 bits are value, legal range is 10^15 to (10^16 - 1) inclusive
protected:
int offset; // These variables *always* hold canonical values on entry/exit
uint64 value;
uint160 mCurrency;
uint64 mValue;
int mOffset;
bool mIsNative;
void canonicalize();
STAmount* duplicate() const { return new STAmount(name, offset, value); }
STAmount* duplicate() const { return new STAmount(name, mCurrency, mOffset, mValue); }
static STAmount* construct(SerializerIterator&, const char *name = NULL);
static const int cMinOffset=-96, cMaxOffset=80;
static const uint64 cMinValue=1000000000000000ull, cMaxValue=9999999999999999ull;
static const int cMinOffset = -96, cMaxOffset = 80;
static const uint64 cMinValue = 1000000000000000ull, cMaxValue = 9999999999999999ull;
static const uint64 cMaxNative = 9000000000000000000ull;
static const uint64 cNotNative = 0x8000000000000000ull;
public:
STAmount(uint64 v = 0, int off = 0) : offset(off), value(v)
{ canonicalize(); } // (1,0)=$1 (1,-2)=$.01 (100,0)=(10000,-2)=$.01
STAmount(const char *n, uint64 v = 0, int off = 0) : SerializedType(n), offset(off), value(v)
STAmount(uint64 v = 0) : mValue(v), mOffset(0), mIsNative(true)
{ ; }
STAmount(const char *n, uint64 v = 0) : SerializedType(n), mValue(v), mOffset(0), mIsNative(true)
{ ; }
STAmount(const uint160& currency, uint64 v = 0, int off = 0) : mCurrency(currency), mValue(v), mOffset(off)
{ canonicalize(); }
STAmount(const char *n, const uint160& currency, uint64 v = 0, int off = 0) : SerializedType(n),
mCurrency(currency), mValue(v), mOffset(off)
{ canonicalize(); }
static std::auto_ptr<SerializedType> deserialize(SerializerIterator& sit, const char *name)
{ return std::auto_ptr<SerializedType>(construct(sit, name)); }
int getLength() const { return 8; }
int getLength() const { return mIsNative ? 8 : 28; }
SerializedTypeID getSType() const { return STI_AMOUNT; }
std::string getText() const;
std::string getRaw() const;
void add(Serializer& s) const;
int getOffset() const { return offset; }
uint64 getValue() const { return value; }
void zero() { offset = -100; value = 0; }
bool isZero() const { return value == 0; }
int getOffset() const { return mOffset; }
uint64 getValue() const { return mValue; }
bool isNative() const { return mIsNative; }
const uint160& getCurrency() const { return mCurrency; }
void zero() { mOffset = mIsNative ? -100 : 0; mValue = 0; }
bool isZero() const { return mValue == 0; }
virtual bool isEquivalent(const SerializedType& t) const;
@@ -225,6 +240,8 @@ public:
bool operator>(const STAmount&) const;
bool operator<=(const STAmount&) const;
bool operator>=(const STAmount&) const;
bool isComparable(const STAmount&) const;
void throwComparable(const STAmount&) const;
STAmount& operator+=(const STAmount&);
STAmount& operator-=(const STAmount&);
@@ -237,11 +254,12 @@ public:
friend STAmount operator+(STAmount v1, STAmount v2);
friend STAmount operator-(STAmount v1, STAmount v2);
friend STAmount operator/(const STAmount& v1, const STAmount& v2);
friend STAmount operator*(const STAmount& v1, const STAmount& v2);
// Someone is offering X for Y, what is the rate?
friend STAmount getRate(const STAmount& offerOut, const STAmount& offerIn);
friend STAmount divide(const STAmount& v1, const STAmount& v2, const uint160& currencyOut);
friend STAmount multiply(const STAmount& v1, const STAmount& v2, const uint160& currencyOut);
// Someone iis offering X for Y, what is the rate?
friend uint64 getRate(const STAmount& offerOut, const STAmount& offerIn);
// Someone is offering X for Y, I try to pay Z, how much do I get?
// And what's left of the offer? And how much do I actually pay?
@@ -251,12 +269,13 @@ public:
friend STAmount getNeeded(const STAmount& offerOut, const STAmount& offerIn, const STAmount& needed);
// Native currency conversions, to/from display format
friend STAmount convertToDisplayAmount(const STAmount& internalAmount,
const STAmount& totalNow, const STAmount& totalInit);
friend STAmount convertToInternalAmount(const STAmount& displayAmount,
const STAmount& totalNow, const STAmount& totalInit);
friend uint64 convertToDisplayAmount(const STAmount& internalAmount, uint64 totalNow, uint64 totalInit);
friend STAmount convertToInternalAmount(uint64 displayAmount, uint64 totalNow, uint64 totalInit,
const char *name = NULL);
static void unitTest();
static STAmount deSerialize(SerializerIterator&);
static void unitTestNC();
static void unitTestNNC();
};
class STHash128 : public SerializedType