[PATCH 1/3] csum-file: add hashwrite_be64()

From: René Scharfe <l.s.r@web.de>
Date: Nov 12, 2020, 12:20 UTC
Message-ID: <16932ced-8bcd-89bd-b927-cae1bce0365a@web.de>

Add a helper function for hashing and writing 64-bit integers in network byte order. It returns the number of written bytes. This simplifies callers that keep track of the file offset, even though this number is a constant.

Suggested-by: Derrick Stolee <dstolee@microsoft.com>
Original-patch-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
---
 csum-file.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/csum-file.h b/csum-file.h
index f9cbd317fb..e54d53d1d0 100644
--- a/csum-file.h
+++ b/csum-file.h
@@ -62,4 +62,11 @@ static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
 	hashwrite(f, &data, sizeof(data));
 }

+static inline size_t hashwrite_be64(struct hashfile *f, uint64_t data)
+{
+	data = htonll(data);
+	hashwrite(f, &data, sizeof(data));
+	return sizeof(data);
+}
+
 #endif
--
2.29.2