Vendor import of diff from OpenBSD's Game of Treesvendor/got/diff/2023-09-15vendor/got/diff

Repository:	ssh://anonymous@got.gameoftrees.org/diff.git
Commit hash:	b5a9c15f4d68c06ec3bf839529b3ed2def0a6af6
Commit date:	2023-09-15

1 files changed, 14 insertions, 0 deletions

diff --git a/test/test004.left.txt b/test/test004.left.txt
new file mode 100644
index 000000000000..72d95cf6331a
--- /dev/null
+++ b/test/test004.left.txt
@@ -0,0 +1,14 @@
+void Chunk_copy(Chunk *src, size_t src_start, Chunk *dst, size_t dst_start, size_t n)
+{
+    if (!Chunk_bounds_check(src, src_start, n)) return;
+    if (!Chunk_bounds_check(dst, dst_start, n)) return;
+
+    memcpy(dst->data + dst_start, src->data + src_start, n);
+}
+
+int Chunk_bounds_check(Chunk *chunk, size_t start, size_t n)
+{
+    if (chunk == NULL) return 0;
+
+    return start <= chunk->length && n <= chunk->length - start;
+}