Add Rate class to support scaling of IOU and XRP amounts

Builds/VisualStudio2015/RippleD.vcxproj

@@ -2799,6 +2799,10 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\src\ripple\protocol\impl\Rate2.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\src\ripple\protocol\impl\RippleAddress.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>
@@ -2921,6 +2925,8 @@
     </ClInclude>
     <ClInclude Include="..\..\src\ripple\protocol\Quality.h">
     </ClInclude>
+    <ClInclude Include="..\..\src\ripple\protocol\Rate.h">
+    </ClInclude>
     <None Include="..\..\src\ripple\protocol\README.md">
     </None>
     <ClInclude Include="..\..\src\ripple\protocol\RippleAddress.h">

Builds/VisualStudio2015/RippleD.vcxproj.filters

@@ -3501,6 +3501,9 @@
     <ClCompile Include="..\..\src\ripple\protocol\impl\Quality.cpp">
       <Filter>ripple\protocol\impl</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\ripple\protocol\impl\Rate2.cpp">
+      <Filter>ripple\protocol\impl</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\ripple\protocol\impl\RippleAddress.cpp">
       <Filter>ripple\protocol\impl</Filter>
     </ClCompile>
@@ -3612,6 +3615,9 @@
     <ClInclude Include="..\..\src\ripple\protocol\Quality.h">
       <Filter>ripple\protocol</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\ripple\protocol\Rate.h">
+      <Filter>ripple\protocol</Filter>
+    </ClInclude>
     <None Include="..\..\src\ripple\protocol\README.md">
       <Filter>ripple\protocol</Filter>
     </None>

src/ripple/protocol/Quality.h

@@ -74,7 +74,7 @@ operator!= (Amounts const& lhs, Amounts const& rhs) noexcept
 //------------------------------------------------------------------------------
 
 // Ripple specific constant used for parsing qualities and other things
-#define QUALITY_ONE         1000000000  // 10e9
+#define QUALITY_ONE 1000000000
 
 /** Represents the logical ratio of output currency to input currency.
     Internally this is stored using a custom floating point representation,

src/ripple/protocol/Rate.h

@@ -0,0 +1,78 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2015 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_PROTOCOL_RATE_H_INCLUDED
+#define RIPPLE_PROTOCOL_RATE_H_INCLUDED
+
+#include <ripple/protocol/STAmount.h>
+#include <beast/utility/noexcept.h>
+#include <boost/operators.hpp>
+#include <cassert>
+#include <cstdint>
+#include <ostream>
+
+namespace ripple {
+
+/** Represents a transfer rate
+
+    Transfer rates are specified as fractions of 1 billion. For example, a
+    transfer rate of 1% is represented as 1010000000.
+*/
+struct Rate
+    : private boost::totally_ordered <Rate>
+{
+    std::uint32_t value;
+
+    Rate () = default;
+
+    Rate (std::uint32_t rate)
+        : value (rate)
+    {
+        assert (rate != 0);
+    }
+};
+
+inline
+bool
+operator== (Rate const& lhs, Rate const& rhs) noexcept
+{
+    return lhs.value == rhs.value;
+}
+
+inline
+bool
+operator< (Rate const& lhs, Rate const& rhs) noexcept
+{
+    return lhs.value < rhs.value;
+}
+
+inline
+std::ostream&
+operator<< (std::ostream& os, Rate const& rate)
+{
+    os << rate.value;
+    return os;
+}
+
+/** A transfer rate signifying a 1:1 exchange */
+extern Rate const parityRate;
+
+}
+
+#endif

src/ripple/protocol/impl/Rate2.cpp

@@ -0,0 +1,28 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2015 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <BeastConfig.h>
+#include <ripple/protocol/Quality.h>
+#include <ripple/protocol/Rate.h>
+
+namespace ripple {
+
+Rate const parityRate (QUALITY_ONE);
+
+}

src/ripple/unity/protocol.cpp

@@ -31,6 +31,7 @@
 #include <ripple/protocol/impl/LedgerFormats.cpp>
 #include <ripple/protocol/impl/PublicKey.cpp>
 #include <ripple/protocol/impl/Quality.cpp>
+#include <ripple/protocol/impl/Rate2.cpp>
 #include <ripple/protocol/impl/RippleAddress.cpp>
 #include <ripple/protocol/impl/SecretKey.cpp>
 #include <ripple/protocol/impl/Serializer.cpp>