format/commitgraph: Add initial commit-graph support

1 files changed, 9 insertions, 0 deletions

diff --git a/internal/intconv/intconv.go b/internal/intconv/intconv.go
index ab9d5c63..08530265 100644
--- a/internal/intconv/intconv.go
+++ b/internal/intconv/intconv.go
@@ -86,3 +86,12 @@ func Uint32ToUint8(v uint32) (uint8, error) {
 
 	return uint8(v), nil
 }
+
+// Uint32ToInt converts v to int, returning an error if it overflows.
+func Uint32ToInt(v uint32) (int, error) {
+	if uint64(v) > uint64(math.MaxInt) {
+		return 0, fmt.Errorf("intconv: uint32 %d overflows int", v)
+	}
+
+	return int(v), nil
+}