X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FHash.cs;h=5b1d3b74335030e8b2c9ceb251352410600ae35f;hb=1f6b6ffe24de703593f20f5f881a2e797473621c;hp=92ce2c75c9af82ff99244f0303c10ea713f89657;hpb=5671ee17bc35fb578e18168833c5d1e3e86a7e28;p=NovacoinLibrary.git
diff --git a/Novacoin/Hash.cs b/Novacoin/Hash.cs
index 92ce2c7..5b1d3b7 100644
--- a/Novacoin/Hash.cs
+++ b/Novacoin/Hash.cs
@@ -27,7 +27,7 @@ namespace Novacoin
///
/// Array of digest bytes.
///
- protected byte[] _hashBytes = null;
+ protected byte[] _hashBytes;
///
/// Hash size, must be overriden
@@ -82,29 +82,38 @@ namespace Novacoin
public bool Equals(Hash item)
{
- if (item == null)
+ if ((object)item == null)
{
return false;
}
-
return _hashBytes.SequenceEqual((byte[])item);
}
public override bool Equals(object o)
{
- throw new NotSupportedException();
+ if (o == null)
+ {
+ return false;
+ }
+
+ return _hashBytes.SequenceEqual(((Hash)o)._hashBytes);
}
public override int GetHashCode()
{
- throw new NotSupportedException();
+ int hash = 17;
+ unchecked
+ {
+ foreach (var element in _hashBytes)
+ {
+ hash = hash * 31 + element.GetHashCode();
+ }
+ }
+ return hash;
}
public int CompareTo(Hash item)
{
- Contract.Requires(item.hashSize == hashSize, "Hashes must have the same size.");
- Contract.Requires(item != null, "Null reference is not allowed.");
-
if (this > item)
{
return 1;
@@ -119,14 +128,19 @@ namespace Novacoin
public static bool operator <(Hash a, Hash b)
{
+ Contract.Requires((object)a != null && (object)b != null, "Null references are not allowed.");
Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
for (int i = a.hashSize - 1; i >= 0; i--)
{
if (a._hashBytes[i] < b._hashBytes[i])
+ {
return true;
+ }
else if (a._hashBytes[i] > b._hashBytes[i])
+ {
return false;
+ }
}
return false;
@@ -134,14 +148,19 @@ namespace Novacoin
public static bool operator <=(Hash a, Hash b)
{
+ Contract.Requires((object)a != null && (object)b != null, "Null references are not allowed.");
Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
for (int i = a.hashSize - 1; i >= 0; i--)
{
if (a._hashBytes[i] < b._hashBytes[i])
+ {
return true;
+ }
else if (a._hashBytes[i] > b._hashBytes[i])
+ {
return false;
+ }
}
return false;
@@ -149,14 +168,19 @@ namespace Novacoin
public static bool operator >(Hash a, Hash b)
{
+ Contract.Requires((object)a != null && (object)b != null, "Null references are not allowed.");
Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
for (int i = a.hashSize - 1; i >= 0; i--)
{
if (a._hashBytes[i] > b._hashBytes[i])
+ {
return true;
+ }
else if (a._hashBytes[i] < b._hashBytes[i])
+ {
return false;
+ }
}
return false;
@@ -164,14 +188,19 @@ namespace Novacoin
public static bool operator >=(Hash a, Hash b)
{
+ Contract.Requires((object)a != null && (object)b != null, "Null references are not allowed.");
Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
for (int i = a.hashSize - 1; i >= 0; i--)
{
if (a._hashBytes[i] > b._hashBytes[i])
+ {
return true;
+ }
else if (a._hashBytes[i] < b._hashBytes[i])
+ {
return false;
+ }
}
return true;
@@ -179,6 +208,7 @@ namespace Novacoin
public static bool operator ==(Hash a, Hash b)
{
+ Contract.Requires((object)a != null && (object)b != null, "Null references are not allowed.");
Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
return a._hashBytes.SequenceEqual(b._hashBytes);
@@ -186,9 +216,7 @@ namespace Novacoin
public static bool operator !=(Hash a, Hash b)
{
- Contract.Requires(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- return !a._hashBytes.SequenceEqual(b._hashBytes);
+ return !(a == b);
}
public override string ToString()