public static bool CheckPathExistance <TLink>(this ILinks <TLink> links, params TLink[] path)
{
var current = path[0];
//EnsureLinkExists(current, "path");
if (!links.Exists(current))
{
return(false);
}
var equalityComparer = EqualityComparer <TLink> .Default;
var constants = links.Constants;
for (var i = 1; i < path.Length; i++)
{
var next = path[i];
var values = links.GetLink(current);
var source = values[constants.SourcePart];
var target = values[constants.TargetPart];
if (equalityComparer.Equals(source, target) && equalityComparer.Equals(source, next))
{
//throw new InvalidOperationException(string.Format("Невозможно выбрать путь, так как и Source и Target совпадают с элементом пути {0}.", next));
return(false);
}
if (!equalityComparer.Equals(next, source) && !equalityComparer.Equals(next, target))
{
//throw new InvalidOperationException(string.Format("Невозможно продолжить путь через элемент пути {0}", next));
return(false);
}
current = next;
}
return(true);
}
public static bool Equals <TLink>(this ILinks <TLink> links, TLink link, TLink source, TLink target)
{
var constants = links.Constants;
var values = links.GetLink(link);
var equalityComparer = EqualityComparer <TLink> .Default;
return(equalityComparer.Equals(values[constants.SourcePart], source) && equalityComparer.Equals(values[constants.TargetPart], target));
}
public static bool IsPartialPoint <TLinkAddress, TConstants>(this ILinks <TLinkAddress, TConstants> links, TLinkAddress link)
where TConstants : LinksConstants <TLinkAddress>
{
if (links.Constants.IsExternalReference(link))
{
return(true);
}
links.EnsureLinkExists(link);
return(Point <TLinkAddress> .IsPartialPoint(links.GetLink(link)));
}
public static TLink GetByKeys <TLink>(this ILinks <TLink> links, TLink root, params int[] path)
{
links.EnsureLinkExists(root, "root");
var currentLink = root;
for (var i = 0; i < path.Length; i++)
{
currentLink = links.GetLink(currentLink)[path[i]];
}
return(currentLink);
}
public static TLink CountUsages <TLink>(this ILinks <TLink> links, TLink link)
{
var constants = links.Constants;
var values = links.GetLink(link);
TLink usagesAsSource = links.Count(new Link <TLink>(constants.Any, link, constants.Any));
var equalityComparer = EqualityComparer <TLink> .Default;
if (equalityComparer.Equals(values[constants.SourcePart], link))
{
usagesAsSource = Arithmetic <TLink> .Decrement(usagesAsSource);
}
TLink usagesAsTarget = links.Count(new Link <TLink>(constants.Any, constants.Any, link));
if (equalityComparer.Equals(values[constants.TargetPart], link))
{
usagesAsTarget = Arithmetic <TLink> .Decrement(usagesAsTarget);
}
return(Arithmetic <TLink> .Add(usagesAsSource, usagesAsTarget));
}
public static TLink GetSquareMatrixSequenceElementByIndex <TLink>(this ILinks <TLink> links, TLink root, ulong size, ulong index)
{
var constants = links.Constants;
var source = constants.SourcePart;
var target = constants.TargetPart;
if (!Platform.Numbers.Math.IsPowerOfTwo(size))
{
throw new ArgumentOutOfRangeException(nameof(size), "Sequences with sizes other than powers of two are not supported.");
}
var path = new BitArray(BitConverter.GetBytes(index));
var length = Bit.GetLowestPosition(size);
links.EnsureLinkExists(root, "root");
var currentLink = root;
for (var i = length - 1; i >= 0; i--)
{
currentLink = links.GetLink(currentLink)[path[i] ? target : source];
}
return(currentLink);
}
private static void AppendPattern(ILinks <ulong> links, LinksConstants <ulong> constants, ulong start, ulong patternMarker, Dictionary <ulong, char> chars, ulong any, ulong @continue, StringBuilder sb, ulong initialPosition, RawNumberToAddressConverter <ulong> rawNumberToAddressConverter)
{
sb.Append('(');
var alternatives = 0;
links.Each(linkParts =>
{
var link = new UInt64Link(linkParts);
if (patternMarker == link.Target)
{
if (alternatives > 0)
{
sb.Append('|');
}
alternatives++;
}
else if (!constants.IsExternalReference(link.Target))
{
var charPosition = new UInt64Link(links.GetLink(link.Target));
if (constants.IsExternalReference(charPosition.Source) && chars.TryGetValue(charPosition.Target, out char targetSymbol))
{
var position = rawNumberToAddressConverter.Convert(charPosition.Source) - 10;
if (position == initialPosition)
{
if (alternatives > 0)
{
sb.Append('|');
}
sb.Append(targetSymbol);
AppendPattern(links, constants, link.Target, patternMarker, chars, any, @continue, sb, initialPosition + 1, rawNumberToAddressConverter);
alternatives++;
}
}
}
return(@continue);
}, new UInt64Link(any, start, any));
sb.Append(')');
}
private static string LinkToString(ILinks <ulong> links, LinksConstants <ulong> constants, ulong linkAddress, Dictionary <ulong, char> chars, RawNumberToAddressConverter <ulong> rawNumberToAddressConverter)
{
if (chars.TryGetValue(linkAddress, out char @char))
{
return($"'{@char.ToString()}'");
}
else if (constants.IsExternalReference(linkAddress))
{
return(rawNumberToAddressConverter.Convert(linkAddress).ToString());
}
else
{
var link = new UInt64Link(links.GetLink(linkAddress));
if (constants.IsExternalReference(link.Source) && chars.TryGetValue(link.Target, out char targetChar))
{
return($"[{rawNumberToAddressConverter.Convert(link.Source)}]'{targetChar}'");
}
else
{
return(linkAddress.ToString());
}
}
}
public static TLink GetTarget <TLink>(this ILinks <TLink> links, TLink link) => links.GetLink(link)[links.Constants.TargetPart];
public static TLink GetSource <TLink>(this ILinks <TLink> links, TLink link) => links.GetLink(link)[links.Constants.SourcePart];
public static void TestCRUDOperations<T>(this ILinks<T> links)
{
var constants = links.Constants;
var equalityComparer = EqualityComparer<T>.Default;
var zero = default(T);
var one = Arithmetic.Increment(zero);
// Create Link
Assert.True(equalityComparer.Equals(links.Count(), zero));
var setter = new Setter<T>(constants.Null);
links.Each(constants.Any, constants.Any, setter.SetAndReturnTrue);
Assert.True(equalityComparer.Equals(setter.Result, constants.Null));
var linkAddress = links.Create();
var link = new Link<T>(links.GetLink(linkAddress));
Assert.True(link.Count == 3);
Assert.True(equalityComparer.Equals(link.Index, linkAddress));
Assert.True(equalityComparer.Equals(link.Source, constants.Null));
Assert.True(equalityComparer.Equals(link.Target, constants.Null));
Assert.True(equalityComparer.Equals(links.Count(), one));
// Get first link
setter = new Setter<T>(constants.Null);
links.Each(constants.Any, constants.Any, setter.SetAndReturnFalse);
Assert.True(equalityComparer.Equals(setter.Result, linkAddress));
// Update link to reference itself
links.Update(linkAddress, linkAddress, linkAddress);
link = new Link<T>(links.GetLink(linkAddress));
Assert.True(equalityComparer.Equals(link.Source, linkAddress));
Assert.True(equalityComparer.Equals(link.Target, linkAddress));
// Update link to reference null (prepare for delete)
var updated = links.Update(linkAddress, constants.Null, constants.Null);
Assert.True(equalityComparer.Equals(updated, linkAddress));
link = new Link<T>(links.GetLink(linkAddress));
Assert.True(equalityComparer.Equals(link.Source, constants.Null));
Assert.True(equalityComparer.Equals(link.Target, constants.Null));
// Delete link
links.Delete(linkAddress);
Assert.True(equalityComparer.Equals(links.Count(), zero));
setter = new Setter<T>(constants.Null);
links.Each(constants.Any, constants.Any, setter.SetAndReturnTrue);
Assert.True(equalityComparer.Equals(setter.Result, constants.Null));
}
public static void TestRawNumbersCRUDOperations<T>(this ILinks<T> links)
{
// Constants
var constants = links.Constants;
var equalityComparer = EqualityComparer<T>.Default;
var zero = default(T);
var one = Arithmetic.Increment(zero);
var two = Arithmetic.Increment(one);
var h106E = new Hybrid<T>(106L, isExternal: true);
var h107E = new Hybrid<T>(-char.ConvertFromUtf32(107)[0]);
var h108E = new Hybrid<T>(-108L);
Assert.Equal(106L, h106E.AbsoluteValue);
Assert.Equal(107L, h107E.AbsoluteValue);
Assert.Equal(108L, h108E.AbsoluteValue);
// Create Link (External -> External)
var linkAddress1 = links.Create();
links.Update(linkAddress1, h106E, h108E);
var link1 = new Link<T>(links.GetLink(linkAddress1));
Assert.True(equalityComparer.Equals(link1.Source, h106E));
Assert.True(equalityComparer.Equals(link1.Target, h108E));
// Create Link (Internal -> External)
var linkAddress2 = links.Create();
links.Update(linkAddress2, linkAddress1, h108E);
var link2 = new Link<T>(links.GetLink(linkAddress2));
Assert.True(equalityComparer.Equals(link2.Source, linkAddress1));
Assert.True(equalityComparer.Equals(link2.Target, h108E));
// Create Link (Internal -> Internal)
var linkAddress3 = links.Create();
links.Update(linkAddress3, linkAddress1, linkAddress2);
var link3 = new Link<T>(links.GetLink(linkAddress3));
Assert.True(equalityComparer.Equals(link3.Source, linkAddress1));
Assert.True(equalityComparer.Equals(link3.Target, linkAddress2));
// Search for created link
var setter1 = new Setter<T>(constants.Null);
links.Each(h106E, h108E, setter1.SetAndReturnFalse);
Assert.True(equalityComparer.Equals(setter1.Result, linkAddress1));
// Search for nonexistent link
var setter2 = new Setter<T>(constants.Null);
links.Each(h106E, h107E, setter2.SetAndReturnFalse);
Assert.True(equalityComparer.Equals(setter2.Result, constants.Null));
// Update link to reference null (prepare for delete)
var updated = links.Update(linkAddress3, constants.Null, constants.Null);
Assert.True(equalityComparer.Equals(updated, linkAddress3));
link3 = new Link<T>(links.GetLink(linkAddress3));
Assert.True(equalityComparer.Equals(link3.Source, constants.Null));
Assert.True(equalityComparer.Equals(link3.Target, constants.Null));
// Delete link
links.Delete(linkAddress3);
Assert.True(equalityComparer.Equals(links.Count(), two));
var setter3 = new Setter<T>(constants.Null);
links.Each(constants.Any, constants.Any, setter3.SetAndReturnTrue);
Assert.True(equalityComparer.Equals(setter3.Result, linkAddress2));
}
private ulong GetFrequency(ulong link) => GetFrequency(_links.GetLink(link));
public static void AppendStructure(this ILinks <ulong> links, StringBuilder sb, HashSet <ulong> visited, ulong linkIndex, Func <Link <ulong>, bool> isElement, Action <StringBuilder, Link <ulong> > appendElement, bool renderIndex = false, bool renderDebug = false)
{
if (sb == null)
{
throw new ArgumentNullException(nameof(sb));
}
if (linkIndex == Constants.Null || linkIndex == Constants.Any || linkIndex == Constants.Itself)
{
return;
}
if (links.Exists(linkIndex))
{
if (visited.Add(linkIndex))
{
sb.Append('(');
var link = new Link <ulong>(links.GetLink(linkIndex));
if (renderIndex)
{
sb.Append(link.Index);
sb.Append(':');
}
if (link.Source == link.Index)
{
sb.Append(link.Index);
}
else
{
var source = new Link <ulong>(links.GetLink(link.Source));
if (isElement(source))
{
appendElement(sb, source);
}
else
{
links.AppendStructure(sb, visited, source.Index, isElement, appendElement, renderIndex);
}
}
sb.Append(' ');
if (link.Target == link.Index)
{
sb.Append(link.Index);
}
else
{
var target = new Link <ulong>(links.GetLink(link.Target));
if (isElement(target))
{
appendElement(sb, target);
}
else
{
links.AppendStructure(sb, visited, target.Index, isElement, appendElement, renderIndex);
}
}
sb.Append(')');
}
else
{
if (renderDebug)
{
sb.Append('*');
}
sb.Append(linkIndex);
}
}
else
{
if (renderDebug)
{
sb.Append('~');
}
sb.Append(linkIndex);
}
}