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Simplify and improve performance of STAmount::createHumanCurrency

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This commit is contained in:
Nik Bougalis
2014-05-04 17:09:42 -07:00
committed by Vinnie Falco
parent 3025d8611b
commit ec0fe312af
1 changed files with 14 additions and 38 deletions
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52
src/ripple_data/protocol/STAmount.cpp
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@@ -219,7 +219,7 @@ STAmount::STAmount (SField::ref n, const Json::Value& v)
std::string STAmount::createHumanCurrency (const uint160& uCurrency)
{
static uint160 const sFiatBits("FFFFFFFFFFFFFFFFFFFFFFFF0000000000000000");
static uint160 const sIsoBits ("FFFFFFFFFFFFFFFFFFFFFFFF000000FFFFFFFFFF");
if (uCurrency.isZero ())
{
@@ -231,46 +231,22 @@ std::string STAmount::createHumanCurrency (const uint160& uCurrency)
return "1";
}
if (CURRENCY_BAD == uCurrency)
if ((uCurrency & sIsoBits).isZero ())
{
return uCurrency.ToString ();
// The offset of the 3 character ISO code in the currency descriptor
int const isoOffset = 12;
std::string const iso(
uCurrency.data () + isoOffset,
uCurrency.data () + isoOffset + 3);
// Specifying the system currency code using ISO-style representation
// is not allowed.
if (iso != SYSTEM_CURRENCY_CODE)
return iso;
}
if ((uCurrency & sFiatBits).isZero ())
{
Serializer s (160 / 8);
s.add160 (uCurrency);
SerializerIterator sit (s);
Blob const vucZeros (sit.getRaw (96 / 8));
Blob const vucIso (sit.getRaw (24 / 8));
Blob const vucVersion (sit.getRaw (16 / 8));
Blob const vucReserved (sit.getRaw (24 / 8));
auto is_zero_filled = [](Blob const& blob)
{
auto ret = std::find_if (blob.cbegin (), blob.cend (),
[](unsigned char c)
{
return c != 0;
});
return ret == blob.cend ();
};
bool bIso = is_zero_filled (vucZeros) // Leading zeros
&& is_zero_filled (vucVersion) // Zero version
&& is_zero_filled (vucReserved); // Reserved is zero.
if (bIso)
return std::string (vucIso.begin (), vucIso.end ());
return uCurrency.ToString ();
}
return uCurrency.GetHex ();
return uCurrency.ToString ();
}
bool STAmount::setValue (const std::string& sAmount)