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path: root/plumbing/format/packfile/diff_delta.go
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-rw-r--r--plumbing/format/packfile/diff_delta.go19
1 files changed, 18 insertions, 1 deletions
diff --git a/plumbing/format/packfile/diff_delta.go b/plumbing/format/packfile/diff_delta.go
index e3438aa..60a04d9 100644
--- a/plumbing/format/packfile/diff_delta.go
+++ b/plumbing/format/packfile/diff_delta.go
@@ -15,6 +15,10 @@ import (
const (
// Standard chunk size used to generate fingerprints
s = 16
+
+ // https://github.com/git/git/blob/f7466e94375b3be27f229c78873f0acf8301c0a5/diff-delta.c#L428
+ // Max size of a copy operation (64KB)
+ maxCopySize = 64 * 1024
)
// GetDelta returns an EncodedObject of type OFSDeltaObject. Base and Target object,
@@ -70,7 +74,20 @@ func DiffDelta(src []byte, tgt []byte) []byte {
ibuf.WriteByte(tgt[i])
} else {
encodeInsertOperation(ibuf, buf)
- buf.Write(encodeCopyOperation(offset, l))
+
+ rl := l
+ aOffset := offset
+ for {
+ if rl < maxCopySize {
+ buf.Write(encodeCopyOperation(aOffset, rl))
+ break
+ }
+
+ buf.Write(encodeCopyOperation(aOffset, maxCopySize))
+ rl -= maxCopySize
+ aOffset += maxCopySize
+ }
+
i += l - 1
}
}