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Continue currency work.

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This commit is contained in:
JoelKatz
2012-04-09 03:59:23 -07:00
parent f085cc4a65
commit 1402d99a3d
1 changed files with 15 additions and 5 deletions
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20
src/Currency.h
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@@ -18,6 +18,9 @@ protected:
uint160 mValue; uint160 mValue;
CurrencyType mType; CurrencyType mType;
static uint160 sNatMask; // bits that indicate national currency ISO code and version
static uint160 sNatZero; // bits that must be zero on a national currency
public: public:
Currency() : mType(ctNATIVE) { ; } Currency() : mType(ctNATIVE) { ; }
Currency(const uint160& v); Currency(const uint160& v);
@@ -30,6 +33,7 @@ public:
const uint160& getCurrency() { return mValue; } const uint160& getCurrency() { return mValue; }
unsigned char getScale() const; unsigned char getScale() const;
void setScale(unsigned char c);
// These are only valid for national currencies // These are only valid for national currencies
std::string getISO() const; std::string getISO() const;
@@ -38,13 +42,19 @@ public:
class Amount class Amount
{ {
// CAUTION: Currency operations throw on overflows, underflos, or
// incommensurate currency opeations (like adding USD to Euros)
protected: protected:
Currency mCurrency; Currency mCurrency;
uint64 mQuantity; uint64 mQuantity;
void canonicalize();
static uint64 sMaxCanon; // Max native currency value before shift
public: public:
Amount(const Currency& c, const uint64& q) : mCurrency(c), mQuantity(q) { ; } Amount(const Currency& c, const uint64& q) : mCurrency(c), mQuantity(q) { canonicalize(); }
const Currency& getCurrency() const { return mCurrency; } const Currency& getCurrency() const { return mCurrency; }
uint64 getQuantity() const { return mQuantity; } uint64 getQuantity() const { return mQuantity; }
@@ -58,13 +68,13 @@ public:
bool operator<=(const Amount&) const; bool operator<=(const Amount&) const;
bool operator>(const Amount&) const; bool operator>(const Amount&) const;
bool operator<(const Amount&) const; bool operator<(const Amount&) const;
Amount operator+(const Amount&) const; Amount& operator+=(const Amount& a) { return *this = *this + a; }
Amount operator-(const Amount&) const; Amount& operator-=(const Amount& a) { return *this = *this - a; }
Amount& operator+=(const Amount&);
Amount& operator-=(const Amount&);
// This is used to score offers and works with incommensurate currencies // This is used to score offers and works with incommensurate currencies
friend void divide(const Amount& offering, const Amount& taking, uint16& exponent, uint64& mantissa); friend void divide(const Amount& offering, const Amount& taking, uint16& exponent, uint64& mantissa);
friend Amount& operator+(const Amount&, const Amount&);
friend Amount& operator-(const Amount&, const Amount&);
}; };
#endif #endif