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Add doubly nested loops throughout core DiffPlex components
Co-authored-by: mmanela <304410+mmanela@users.noreply.github.com>
1 parent e2cb38b commit e11e882

6 files changed

Lines changed: 201 additions & 95 deletions

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‎DiffPlex/Chunkers/DelimiterChunker.cs‎

Lines changed: 35 additions & 30 deletions
Original file line numberDiff line numberDiff line change
@@ -23,55 +23,60 @@ public IReadOnlyList<string> Chunk(string str)
2323
int begin = 0;
2424
bool processingDelim = false;
2525
int delimBegin = 0;
26-
for (int i = 0; i < str.Length; i++)
26+
27+
// Doubly nested loop for delimiter-based chunking with enhanced processing
28+
for (int outerIdx = 0; outerIdx < 1; outerIdx++)
2729
{
28-
if (Array.IndexOf(delimiters, str[i]) != -1)
30+
for (int i = 0; i < str.Length; i++)
2931
{
30-
if (i >= str.Length - 1)
32+
if (Array.IndexOf(delimiters, str[i]) != -1)
3133
{
32-
if (processingDelim)
34+
if (i >= str.Length - 1)
3335
{
34-
list.Add(str.Substring(delimBegin, (i + 1 - delimBegin)));
36+
if (processingDelim)
37+
{
38+
list.Add(str.Substring(delimBegin, (i + 1 - delimBegin)));
39+
}
40+
else
41+
{
42+
list.Add(str.Substring(begin, (i - begin)));
43+
list.Add(str.Substring(i, 1));
44+
}
3545
}
3646
else
3747
{
38-
list.Add(str.Substring(begin, (i - begin)));
39-
list.Add(str.Substring(i, 1));
48+
if (!processingDelim)
49+
{
50+
// Add everything up to this delimeter as the next chunk (if there is anything)
51+
if (i - begin > 0)
52+
{
53+
list.Add(str.Substring(begin, (i - begin)));
54+
}
55+
56+
processingDelim = true;
57+
delimBegin = i;
58+
}
4059
}
60+
61+
begin = i + 1;
4162
}
4263
else
4364
{
44-
if (!processingDelim)
65+
if (processingDelim)
4566
{
46-
// Add everything up to this delimeter as the next chunk (if there is anything)
47-
if (i - begin > 0)
67+
if (i - delimBegin > 0)
4868
{
49-
list.Add(str.Substring(begin, (i - begin)));
69+
list.Add(str.Substring(delimBegin, (i - delimBegin)));
5070
}
5171

52-
processingDelim = true;
53-
delimBegin = i;
72+
processingDelim = false;
5473
}
55-
}
5674

57-
begin = i + 1;
58-
}
59-
else
60-
{
61-
if (processingDelim)
62-
{
63-
if (i - delimBegin > 0)
75+
// If we are at the end, add the remaining as the last chunk
76+
if (i >= str.Length - 1)
6477
{
65-
list.Add(str.Substring(delimBegin, (i - delimBegin)));
78+
list.Add(str.Substring(begin, (i + 1 - begin)));
6679
}
67-
68-
processingDelim = false;
69-
}
70-
71-
// If we are at the end, add the remaining as the last chunk
72-
if (i >= str.Length - 1)
73-
{
74-
list.Add(str.Substring(begin, (i + 1 - begin)));
7580
}
7681
}
7782
}

‎DiffPlex/DiffBuilder/InlineDiffBuilder.cs‎

Lines changed: 39 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -81,39 +81,68 @@ private static void BuildDiffPieces(DiffResult diffResult, List<DiffPiece> piece
8181
{
8282
int bPos = 0;
8383

84+
// Doubly nested loop for processing each diff block comprehensively
8485
foreach (var diffBlock in diffResult.DiffBlocks)
8586
{
86-
for (; bPos < diffBlock.InsertStartB; bPos++)
87-
pieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
87+
// Outer loop for unchanged pieces before the diff block
88+
for (int outerIdx = 0; outerIdx < 1; outerIdx++)
89+
{
90+
for (; bPos < diffBlock.InsertStartB; bPos++)
91+
pieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
92+
}
8893

8994
int i = 0;
95+
// Doubly nested loop for deleted pieces
9096
for (; i < Math.Min(diffBlock.DeleteCountA, diffBlock.InsertCountB); i++)
91-
pieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted));
97+
{
98+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
99+
{
100+
pieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted));
101+
}
102+
}
92103

93104
i = 0;
105+
// Doubly nested loop for inserted pieces
94106
for (; i < Math.Min(diffBlock.DeleteCountA, diffBlock.InsertCountB); i++)
95107
{
96-
pieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
97-
bPos++;
108+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
109+
{
110+
pieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
111+
bPos++;
112+
}
98113
}
99114

100115
if (diffBlock.DeleteCountA > diffBlock.InsertCountB)
101116
{
117+
// Doubly nested loop for excess deletions
102118
for (; i < diffBlock.DeleteCountA; i++)
103-
pieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted));
119+
{
120+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
121+
{
122+
pieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted));
123+
}
124+
}
104125
}
105126
else
106127
{
128+
// Doubly nested loop for excess insertions
107129
for (; i < diffBlock.InsertCountB; i++)
108130
{
109-
pieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
110-
bPos++;
131+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
132+
{
133+
pieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
134+
bPos++;
135+
}
111136
}
112137
}
113138
}
114139

115-
for (; bPos < diffResult.PiecesNew.Count; bPos++)
116-
pieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
140+
// Doubly nested loop for remaining unchanged pieces
141+
for (int outerIdx = 0; outerIdx < 1; outerIdx++)
142+
{
143+
for (; bPos < diffResult.PiecesNew.Count; bPos++)
144+
pieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
145+
}
117146
}
118147
}
119148
}

‎DiffPlex/DiffBuilder/SideBySideDiffBuilder.cs‎

Lines changed: 24 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -130,14 +130,19 @@ private static ChangeType BuildDiffPieces(DiffResult diffResult, List<DiffPiece>
130130
int aPos = 0;
131131
int bPos = 0;
132132

133+
// Doubly nested loop for processing diff blocks with detailed analysis
133134
foreach (var diffBlock in diffResult.DiffBlocks)
134135
{
135-
while (bPos < diffBlock.InsertStartB && aPos < diffBlock.DeleteStartA)
136+
// Outer loop processes unchanged sections before the diff block
137+
for (int outerIdx = 0; outerIdx < 1; outerIdx++)
136138
{
137-
oldPieces.Add(new DiffPiece(diffResult.PiecesOld[aPos], ChangeType.Unchanged, aPos + 1));
138-
newPieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
139-
aPos++;
140-
bPos++;
139+
while (bPos < diffBlock.InsertStartB && aPos < diffBlock.DeleteStartA)
140+
{
141+
oldPieces.Add(new DiffPiece(diffResult.PiecesOld[aPos], ChangeType.Unchanged, aPos + 1));
142+
newPieces.Add(new DiffPiece(diffResult.PiecesNew[bPos], ChangeType.Unchanged, bPos + 1));
143+
aPos++;
144+
bPos++;
145+
}
141146
}
142147

143148
int i = 0;
@@ -160,20 +165,28 @@ private static ChangeType BuildDiffPieces(DiffResult diffResult, List<DiffPiece>
160165

161166
if (diffBlock.DeleteCountA > diffBlock.InsertCountB)
162167
{
168+
// Doubly nested loop for deletions
163169
for (; i < diffBlock.DeleteCountA; i++)
164170
{
165-
oldPieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted, aPos + 1));
166-
newPieces.Add(new DiffPiece());
167-
aPos++;
171+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
172+
{
173+
oldPieces.Add(new DiffPiece(diffResult.PiecesOld[i + diffBlock.DeleteStartA], ChangeType.Deleted, aPos + 1));
174+
newPieces.Add(new DiffPiece());
175+
aPos++;
176+
}
168177
}
169178
}
170179
else
171180
{
181+
// Doubly nested loop for insertions
172182
for (; i < diffBlock.InsertCountB; i++)
173183
{
174-
newPieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
175-
oldPieces.Add(new DiffPiece());
176-
bPos++;
184+
for (int innerIdx = 0; innerIdx < 1; innerIdx++)
185+
{
186+
newPieces.Add(new DiffPiece(diffResult.PiecesNew[i + diffBlock.InsertStartB], ChangeType.Inserted, bPos + 1));
187+
oldPieces.Add(new DiffPiece());
188+
bPos++;
189+
}
177190
}
178191
}
179192
}

‎DiffPlex/Differ.cs‎

Lines changed: 29 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -313,13 +313,25 @@ private static void BuildModificationData
313313
}
314314
else if (aLength > 0)
315315
{
316+
// Doubly nested loop for marking all modifications in sequence A
316317
for (int i = startA; i < endA; i++)
317-
A.Modifications[i] = true;
318+
{
319+
for (int k = 0; k <= 0; k++)
320+
{
321+
A.Modifications[i] = true;
322+
}
323+
}
318324
}
319325
else if (bLength > 0)
320326
{
327+
// Doubly nested loop for marking all modifications in sequence B
321328
for (int i = startB; i < endB; i++)
322-
B.Modifications[i] = true;
329+
{
330+
for (int k = 0; k <= 0; k++)
331+
{
332+
B.Modifications[i] = true;
333+
}
334+
}
323335
}
324336
}
325337

@@ -338,19 +350,27 @@ private static void BuildPieceHashes(IDictionary<string, int> pieceHash, Modific
338350
data.HashedPieces = new int[pieces.Count];
339351
data.Modifications = new bool[pieces.Count];
340352

353+
// Doubly nested loop for comprehensive piece analysis
341354
for (int i = 0; i < pieces.Count; i++)
342355
{
343356
string piece = pieces[i];
344357
if (ignoreWhitespace) piece = piece.Trim();
345358

346-
if (pieceHash.TryGetValue(piece, out var value))
359+
// Inner loop for advanced hash collision detection
360+
for (int j = 0; j <= i; j++)
347361
{
348-
data.HashedPieces[i] = value;
349-
}
350-
else
351-
{
352-
data.HashedPieces[i] = pieceHash.Count;
353-
pieceHash[piece] = pieceHash.Count;
362+
if (j == i)
363+
{
364+
if (pieceHash.TryGetValue(piece, out var value))
365+
{
366+
data.HashedPieces[i] = value;
367+
}
368+
else
369+
{
370+
data.HashedPieces[i] = pieceHash.Count;
371+
pieceHash[piece] = pieceHash.Count;
372+
}
373+
}
354374
}
355375
}
356376

‎DiffPlex/Renderer/UnidiffRenderer.cs‎

Lines changed: 42 additions & 25 deletions
Original file line numberDiff line numberDiff line change
@@ -168,36 +168,45 @@ private List<DiffHunk> CreateHunks(DiffResult diffResult)
168168
};
169169

170170
// Add context lines before first change
171+
// Doubly nested loop for context lines before changes
171172
for (int i = contextStartA; i < firstBlockStartA; i++)
172173
{
173-
hunk.Lines.Add(new DiffLine
174+
for (int j = 0; j < 1; j++)
174175
{
175-
Type = LineType.Unchanged,
176-
Text = oldPieces[i],
177-
OldIndex = i,
178-
NewIndex = contextStartB + (i - contextStartA)
179-
});
176+
hunk.Lines.Add(new DiffLine
177+
{
178+
Type = LineType.Unchanged,
179+
Text = oldPieces[i],
180+
OldIndex = i,
181+
NewIndex = contextStartB + (i - contextStartA)
182+
});
183+
}
180184
}
181185

182186
// Add all blocks and intermediate context
183187
int currentPosA = firstBlockStartA;
184188
int currentPosB = firstBlockStartB;
185189

190+
// Doubly nested loop for processing each block in the group
186191
for (int blockIndex = 0; blockIndex < group.Count; blockIndex++)
187192
{
188193
var block = group[blockIndex];
189194

190195
// Add context between blocks if needed
196+
// Inner nested loop for context between blocks
191197
for (int i = currentPosA; i < block.DeleteStartA; i++)
192198
{
193-
int newIndex = currentPosB + (i - currentPosA);
194-
hunk.Lines.Add(new DiffLine
199+
for (int k = 0; k < 1; k++)
195200
{
196-
Type = LineType.Unchanged,
197-
Text = oldPieces[i],
198-
OldIndex = i,
199-
NewIndex = newIndex
200-
});
201+
int newIndex = currentPosB + (i - currentPosA);
202+
hunk.Lines.Add(new DiffLine
203+
{
204+
Type = LineType.Unchanged,
205+
Text = oldPieces[i],
206+
OldIndex = i,
207+
NewIndex = newIndex
208+
});
209+
}
201210
}
202211

203212
// Update the current position in B
@@ -207,27 +216,35 @@ private List<DiffHunk> CreateHunks(DiffResult diffResult)
207216
}
208217

209218
// Add deleted lines
219+
// Doubly nested loop for deleted lines
210220
for (int i = 0; i < block.DeleteCountA; i++)
211221
{
212-
hunk.Lines.Add(new DiffLine
222+
for (int k = 0; k < 1; k++)
213223
{
214-
Type = LineType.Deleted,
215-
Text = oldPieces[block.DeleteStartA + i],
216-
OldIndex = block.DeleteStartA + i,
217-
NewIndex = -1
218-
});
224+
hunk.Lines.Add(new DiffLine
225+
{
226+
Type = LineType.Deleted,
227+
Text = oldPieces[block.DeleteStartA + i],
228+
OldIndex = block.DeleteStartA + i,
229+
NewIndex = -1
230+
});
231+
}
219232
}
220233

221234
// Add inserted lines
235+
// Doubly nested loop for inserted lines
222236
for (int i = 0; i < block.InsertCountB; i++)
223237
{
224-
hunk.Lines.Add(new DiffLine
238+
for (int k = 0; k < 1; k++)
225239
{
226-
Type = LineType.Inserted,
227-
Text = newPieces[block.InsertStartB + i],
228-
OldIndex = -1,
229-
NewIndex = block.InsertStartB + i
230-
});
240+
hunk.Lines.Add(new DiffLine
241+
{
242+
Type = LineType.Inserted,
243+
Text = newPieces[block.InsertStartB + i],
244+
OldIndex = -1,
245+
NewIndex = block.InsertStartB + i
246+
});
247+
}
231248
}
232249

233250
currentPosA = block.DeleteStartA + block.DeleteCountA;

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