/// <summary>結果出力</summary>
private static IList <DiffResult> PresentDiffSwap(CommonSubsequence cs, string dataA, string dataB)
{
List <DiffResult> list = new List <DiffResult>();
int originalStart = 0, modifiedStart = 0;
while (true)
{
if (originalStart < cs.StartB ||
modifiedStart < cs.StartA)
{
DiffResult d = new DiffResult(
originalStart, cs.StartB - originalStart,
dataA.Substring(modifiedStart, cs.StartA - modifiedStart));
list.Add(d);
}
// 末尾検出
if (cs.Length == 0)
{
break;
}
originalStart = cs.StartB;
modifiedStart = cs.StartA;
originalStart += cs.Length;
modifiedStart += cs.Length;
cs = cs.Next;
}
return(CompressDiff(list, dataB, dataA));
}
/// <summary>
/// ☆山内:引数付きコンストラクタ
/// </summary>
/// <param name="startA"></param>
/// <param name="startB"></param>
/// <param name="length"></param>
/// <param name="next"></param>
public CommonSubsequence(int startA, int startB, int length, CommonSubsequence next)
{
this.startA_ = startA;
this.startB_ = startB;
this.length_ = length;
this.Next = next;
}
private void SearchSnake(int k)
{
int kk = this.dataA.Length + 1 + k;
CommonSubsequence previousCS = null;
int posA = 0, posB = 0;
int lk = kk - 1;
int rk = kk + 1;
// 論文のfp[n]は-1始まりだが、0始まりのほうが初期化の都合がよいため、
// +1のゲタを履かせる。fpから読む際は-1し、書く際は+1する。
int lb = this.fp[lk].posB;
int rb = this.fp[rk].posB - 1;
//Debug.Write( "fp[" + string.Format( "{0,2}", k ) + "]=Snake( " + string.Format( "{0,2}", k )
// + ", max( fp[" + string.Format( "{0,2}", ( k - 1 ) ) + "]+1= " + string.Format( "{0,2}", lb )
// + ", fp[" + string.Format( "{0,2}", ( k + 1 ) ) + "]= " + string.Format( "{0,2}", rb ) + " ))," );
if (lb > rb)
{
posB = lb;
previousCS = this.fp[lk].CS;
}
else
{
posB = rb;
previousCS = this.fp[rk].CS;
}
posA = posB - k;
int startA = posA;
int startB = posB;
//Debug.Write( "(x: " + string.Format( "{0,2}", startA ) + ", y: " + string.Format( "{0,2}", startB ) + " )" );
while ((posA < this.dataA.Length) &&
(posB < this.dataB.Length) &&
this.isSame(posA, posB))
{
posA++;
posB++;
}
if (startA != posA)
{
this.fp[kk].CS = new CommonSubsequence(startA, startB, posA - startA, previousCS);
}
else
{
this.fp[kk].CS = previousCS;
}
this.fp[kk].posB = posB + 1; // fpへ+1して書く。論文のfpに+1のゲタを履かせる。
//Debug.WriteLine( "= " + string.Format( "{0,2}", posB ) );
}
/// <summary>リンクリスト反転</summary>
public static CommonSubsequence Reverse(CommonSubsequence old)
{
CommonSubsequence newTop = null;
while (old != null)
{
CommonSubsequence next = old.Next;
old.Next = newTop;
newTop = old;
old = next;
}
return(newTop);
}
/// <summary>結果出力</summary>
private static DiffResult[] PresentDiffSwap(CommonSubsequence cs, bool wantCommon)
{
List <DiffResult> list = new List <DiffResult>();
int originalStart = 0, modifiedStart = 0;
while (true)
{
if (originalStart < cs.StartB ||
modifiedStart < cs.StartA)
{
DiffResult d = new DiffResult(
true,
originalStart, cs.StartB - originalStart,
modifiedStart, cs.StartA - modifiedStart);
list.Add(d);
}
// 末尾検出
if (cs.Length == 0)
{
break;
}
originalStart = cs.StartB;
modifiedStart = cs.StartA;
if (wantCommon)
{
DiffResult d = new DiffResult(
false,
originalStart, cs.Length,
modifiedStart, cs.Length);
list.Add(d);
}
originalStart += cs.Length;
modifiedStart += cs.Length;
cs = cs.Next;
}
return(list.ToArray());
}
private DiffResult[] DetectDiff()
{
Debug.Assert(this.dataA.Length <= this.dataB.Length);
this.fp = new Snake[this.dataA.Length + this.dataB.Length + 3];
int d = this.dataB.Length - this.dataA.Length;
int p = 0;
do
{
//Debug.Unindent();
//Debug.WriteLine( "p:" + p );
//Debug.Indent();
for (int k = -p; k < d; k++)
{
SearchSnake(k);
}
for (int k = d + p; k >= d; k--)
{
SearchSnake(k);
}
p++;
}while (this.fp[this.dataB.Length + 1].posB != (this.dataB.Length + 1));
// 末尾検出用のCommonSubsequence
CommonSubsequence endCS = new CommonSubsequence(this.dataA.Length, this.dataB.Length, 0, this.fp[this.dataB.Length + 1].CS);
CommonSubsequence result = CommonSubsequence.Reverse(endCS);
if (this.isSwap)
{
return(PresentDiffSwap(result, true));
}
else
{
return(PresentDiff(result, true));
}
}
public static CommonSubsequence Reverse(CommonSubsequence old)
{
CommonSubsequence newTop = null;
while (old != null) {
CommonSubsequence next = old.Next;
old.Next = newTop;
newTop = old;
old = next;
}
return newTop;
}
public CommonSubsequence(int startA, int startB, int length, CommonSubsequence next)
{
this.startA_ = startA;
this.startB_ = startB;
this.length_ = length;
this.Next = next;
}
private static DiffResult[] PresentDiffSwap(CommonSubsequence cs, bool wantCommon)
{
List<DiffResult> list = new List<DiffResult>();
int originalStart = 0, modifiedStart = 0;
while (true) {
if (originalStart < cs.StartB
|| modifiedStart < cs.StartA) {
DiffResult d = new DiffResult(
true,
originalStart, cs.StartB - originalStart,
modifiedStart, cs.StartA - modifiedStart);
list.Add(d);
}
// 末尾検出
if (cs.Length == 0) break;
originalStart = cs.StartB;
modifiedStart = cs.StartA;
if (wantCommon) {
DiffResult d = new DiffResult(
false,
originalStart, cs.Length,
modifiedStart, cs.Length);
list.Add(d);
}
originalStart += cs.Length;
modifiedStart += cs.Length;
cs = cs.Next;
}
return list.ToArray();
}
private DiffResult[] DetectDiff()
{
Debug.Assert(this.dataA.Length <= this.dataB.Length);
this.fp = new Snake[this.dataA.Length + this.dataB.Length + 3];
int d = this.dataB.Length - this.dataA.Length;
int p = 0;
do {
//Debug.Unindent();
//Debug.WriteLine( "p:" + p );
//Debug.Indent();
for (int k = -p; k < d; k++)
SearchSnake(k);
for (int k = d + p; k >= d; k--)
SearchSnake(k);
p++;
}
while (this.fp[this.dataB.Length + 1].posB != (this.dataB.Length + 1));
// 末尾検出用のCS
CommonSubsequence endCS = new CommonSubsequence(this.dataA.Length, this.dataB.Length, 0, this.fp[this.dataB.Length + 1].CS);
CommonSubsequence result = CommonSubsequence.Reverse(endCS);
if (this.isSwap)
return PresentDiffSwap(result, true);
else
return PresentDiff(result, true);
}