internal static int HashUChar32(int h, int c)
{
h = Trie2.HashByte(h, c & 255);
h = Trie2.HashByte(h, (c >> 8) & 255);
h = Trie2.HashByte(h, c >> 16);
return(h);
}
/// <summary>
/// Internal constructor.
/// </summary>
internal Trie2CharSequenceEnumerator(Trie2 trie2, ICharSequence t, int index)
{
this.trie2 = trie2;
text = t;
textLength = text.Length;
Set(index);
}
internal static int HashInt(int h, int i)
{
h = Trie2.HashByte(h, i & 255);
h = Trie2.HashByte(h, (i >> 8) & 255);
h = Trie2.HashByte(h, (i >> 16) & 255);
h = Trie2.HashByte(h, (i >> 24) & 255);
return(h);
}
// The normal constructor that configures the iterator to cover the complete
// contents of the Trie2
internal Trie2Enumerator(Trie2 trie2, IValueMapper vm)
{
this.trie2 = trie2;
mapper = vm;
nextStart = 0;
limitCP = 0x110000;
doLeadSurrogates = true;
}
public override int GetHashCode()
{
int h = Trie2.InitHash();
h = Trie2.HashUChar32(h, StartCodePoint);
h = Trie2.HashUChar32(h, EndCodePoint);
h = Trie2.HashInt(h, Value);
h = Trie2.HashByte(h, IsLeadSurrogate ? 1 : 0);
return(h);
}
// An alternate constructor that configures the iterator to cover only the
// code points corresponding to a particular Lead Surrogate value.
internal Trie2Enumerator(Trie2 trie2, char leadSurrogate, IValueMapper vm)
{
if (leadSurrogate < 0xd800 || leadSurrogate > 0xdbff)
{
throw new ArgumentException("Bad lead surrogate value.");
}
this.trie2 = trie2;
mapper = vm;
nextStart = (leadSurrogate - 0xd7c0) << 10;
limitCP = nextStart + 0x400;
doLeadSurrogates = false; // Do not iterate over lead the special lead surrogate
// values after completing iteration over code points.
}
/// <summary>
/// Equals function. Two <see cref="Trie"/>s are equal if their contents are equal.
/// The type need not be the same, so a <see cref="Trie2Writable"/> will be equal to
/// (read-only) <see cref="Trie2_16"/> or <see cref="Trie2_32"/> so long as they are storing the same values.
/// </summary>
public override bool Equals(object other)
{
if (!(other is Trie2))
{
return(false);
}
Trie2 OtherTrie = (Trie2)other;
Trie2Range rangeFromOther;
using (var otherIter = OtherTrie.GetEnumerator())
{
foreach (Trie2Range rangeFromThis in this)
{
if (otherIter.MoveNext() == false)
{
return(false);
}
rangeFromOther = otherIter.Current;
if (!rangeFromThis.Equals(rangeFromOther))
{
return(false);
}
}
if (otherIter.MoveNext())
{
return(false);
}
}
if (errorValue != OtherTrie.errorValue ||
initialValue != OtherTrie.initialValue)
{
return(false);
}
return(true);
}
/// <summary>
/// Create a <see cref="Trie2"/> from its serialized form. Inverse of utrie2_serialize().
/// </summary>
/// <remarks>
/// The serialized format is identical between ICU4C, ICU4J, and ICU4N, so this function
/// will work with serialized <see cref="Trie2"/>s from any.
/// <para/>
/// The serialized <see cref="Trie2"/> in the bytes may be in either little or big endian byte order.
/// This allows using serialized Tries from ICU4C without needing to consider the
/// byte order of the system that created them.
/// </remarks>
/// <param name="bytes">A byte buffer to the serialized form of a <see cref="Trie2"/>.</param>
/// <returns>An unserialized <see cref="Trie2_32"/>, ready for use.</returns>
/// <exception cref="System.ArgumentException">If the buffer does not contain a serialized <see cref="Trie2"/>.</exception>
/// <exception cref="System.IO.IOException">If a read error occurs in the buffer.</exception>
/// <exception cref="System.InvalidCastException">If the bytes contain a serialized <see cref="Trie2_16"/>.</exception>
new public static Trie2_32 CreateFromSerialized(ByteBuffer bytes) // ICU4N TODO: API Create overload that accepts byte[]
{
return((Trie2_32)Trie2.CreateFromSerialized(bytes));
}
