From cecce9bf4a2a2178aa66ee3d9085e0476273c8ca Mon Sep 17 00:00:00 2001
From: JoelKatz <DavidJoelSchwartz@GMail.com>
Date: Fri, 26 Oct 2012 13:37:54 -0700
Subject: [PATCH] add 'isDefault' function.

---
 src/SerializedObject.h |  2 ++
 src/SerializedTypes.h  | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/SerializedObject.h b/src/SerializedObject.h
index 75d9ca64c..00c89ed1e 100644
--- a/src/SerializedObject.h
+++ b/src/SerializedObject.h
@@ -58,6 +58,7 @@ public:
 
 	virtual SerializedTypeID getSType() const { return STI_OBJECT; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const { return mData.empty(); }
 
 	virtual void add(Serializer& s) const	{ add(s, true);	} // just inner elements
 	void add(Serializer& s, bool withSignature) const;
@@ -241,6 +242,7 @@ public:
 
 	virtual SerializedTypeID getSType() const 		{ return STI_ARRAY; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const					{ return value.empty(); }
 };
 
 inline STArray::iterator range_begin(STArray& x)		{ return x.begin(); }
diff --git a/src/SerializedTypes.h b/src/SerializedTypes.h
index 80f5ca110..783411059 100644
--- a/src/SerializedTypes.h
+++ b/src/SerializedTypes.h
@@ -72,6 +72,8 @@ public:
 	{ return (getSType() == t.getSType()) && isEquivalent(t); }
 	bool operator!=(const SerializedType& t) const
 	{ return (getSType() != t.getSType()) || !isEquivalent(t); }
+
+	virtual bool isDefault() const	{ return true; }
 };
 
 inline SerializedType* new_clone(const SerializedType& s) { return s.clone().release(); }
@@ -103,6 +105,7 @@ public:
 
 	operator unsigned char() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value == 0; }
 };
 
 class STUInt16 : public SerializedType
@@ -130,6 +133,7 @@ public:
 
 	operator uint16() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value == 0; }
 };
 
 class STUInt32 : public SerializedType
@@ -157,6 +161,7 @@ public:
 
 	operator uint32() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value == 0; }
 };
 
 class STUInt64 : public SerializedType
@@ -184,6 +189,7 @@ public:
 
 	operator uint64() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value == 0; }
 };
 
 class STAmount : public SerializedType
@@ -295,6 +301,7 @@ public:
 	void setValue(const STAmount &);
 
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return mValue == 0 && mIssuer.isZero() && mCurrency.isZero(); }
 
 	bool operator==(const STAmount&) const;
 	bool operator!=(const STAmount&) const;
@@ -398,6 +405,7 @@ public:
 
 	operator uint128() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value.isZero(); }
 };
 
 class STHash160 : public SerializedType
@@ -428,6 +436,7 @@ public:
 
 	operator uint160() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value.isZero(); }
 };
 
 class STHash256 : public SerializedType
@@ -458,6 +467,7 @@ public:
 
 	operator uint256() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value.isZero(); }
 };
 
 class STVariableLength : public SerializedType
@@ -489,6 +499,7 @@ public:
 
 	operator std::vector<unsigned char>() const { return value; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value.empty(); }
 };
 
 class STAccount : public STVariableLength
@@ -668,6 +679,7 @@ public:
 	void addPath(const STPath& e)						{ value.push_back(e); }
 
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return value.empty(); }
 
 	void printDebug();
 
@@ -735,6 +747,7 @@ public:
 	const std::vector<uint256>& peekValue() const { return mValue; }
 	std::vector<uint256>& peekValue() { return mValue; }
 	virtual bool isEquivalent(const SerializedType& t) const;
+	virtual bool isDefault() const	{ return mValue.empty(); }
 
 	std::vector<uint256> getValue() const			{ return mValue; }
 	bool isEmpty() const							{ return mValue.empty(); }