Subject: [PATCH] Alter sha1close() 3rd argument to request flush only

From: Dana How <[email-masked]>
Date: Tue, 08 May 2007 12:59:57 -0700

update=0 suppressed writing the final SHA-1 but was not used.
Now final=0 suppresses SHA-1 finalization, SHA-1 writing,
and closing -- in other words,  only flush the buffer.

Signed-off-by: Dana L. How <[email-masked]>
---
 csum-file.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/csum-file.c b/csum-file.c
index 7c806ad..9913cb5 100644
--- a/csum-file.c
+++ b/csum-file.c
@@ -29,18 +29,20 @@ static void sha1flush(struct sha1file *f, unsigned int count)
 	}
 }
 
-int sha1close(struct sha1file *f, unsigned char *result, int update)
+int sha1close(struct sha1file *f, unsigned char *result, int final)
 {
 	unsigned offset = f->offset;
 	if (offset) {
 		SHA1_Update(&f->ctx, f->buffer, offset);
 		sha1flush(f, offset);
+		f->offset = 0;
 	}
+	if (!final)
+		return 0;	/* only want to flush (no checksum write, no close) */
 	SHA1_Final(f->buffer, &f->ctx);
 	if (result)
 		hashcpy(result, f->buffer);
-	if (update)
-		sha1flush(f, 20);
+	sha1flush(f, 20);
 	if (close(f->fd))
 		die("%s: sha1 file error on close (%s)", f->name, strerror(errno));
 	free(f);
-- 
1.5.2.rc0.787.g0014