git/list[1] front-page[2] threads[3] people[4] search[5] about
 

[PATCH 4/4] write_sha1_file(): do not use a separate sha1[] array

From
Junio C Hamano <gitster@pobox.com>
Date
May 4, 2015, 21:37 UTC
Message-ID
<1430775451-31130-5-git-send-email-gitster@pobox.com>
In-Reply-To
<1430775451-31130-1-git-send-email-gitster@pobox.com>

In the beginning, write_sha1_file() did not have a way to tell the caller the name of the object it wrote to the caller. This was changed in d6d3f9d0 (This implements the new "recursive tree" write-tree., 2005-04-09) by adding the "returnsha1" parameter to the function so that the callers who are interested in the value can optionally pass a pointer to receive it.

It turns out that all callers do want to know the name of the object it just has written. Nobody passes a NULL to this parameter, hence it is not necessary to use a separate sha1[] array to receive the result from write_sha1_file_prepare(), and copy the result to the returnsha1 supplied by the caller.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 * This is something I noticed while in the vicinity.
 sha1_file.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/sha1_file.c b/sha1_file.c
index 0fe3f29..cec0ef2 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2945,9 +2945,8 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	return move_temp_to_file(tmp_file, filename);
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
+int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
 {
-	unsigned char sha1[20];
 	char hdr[32];
 	int hdrlen;
 
@@ -2955,8 +2954,6 @@ int write_sha1_file(const void *buf, unsigned long len, const char *type, unsign
 	 * it out into .git/objects/??/?{38} file.
 	 */
 	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (returnsha1)
-		hashcpy(returnsha1, sha1);
 	if (has_sha1_file(sha1))
 		return 0;
 	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
-- 
2.4.0-302-g6743426
Previous: Junio C Hamano
Message 15 of 15 in “hash-object crash fix and new doc and tests”
  1. 0/3 hash-object crash fix and new doc and testsEric Sunshine, May 4, 2015
  2. 1/3 git-hash-object.txt: document --literally optionEric Sunshine, May 4, 2015
  3. 2/3 t1007: add hash-object --literally testsEric Sunshine, May 4, 2015
  4. 3/3 write_sha1_file_prepare: fix buffer overrun with extra-long object typeEric Sunshine, May 4, 2015
  5. Junio C HamanoMay 4, 2015
  6. Junio C HamanoMay 4, 2015
  7. 0/4 "hash-object --literally" fixesJunio C Hamano, May 4, 2015
  8. 1/4 git-hash-object.txt: document --literally optionJunio C Hamano, May 4, 2015
  9. 2/4 write_sha1_file_prepare: fix buffer overrun with extra-long object typeJunio C Hamano, May 4, 2015
  10. Eric SunshineMay 5, 2015
  11. Junio C HamanoMay 5, 2015
  12. Junio C HamanoMay 5, 2015
  13. Eric SunshineMay 5, 2015
  14. 3/4 t1007: add hash-object --literally testsJunio C Hamano, May 4, 2015
  15. 4/4 write_sha1_file(): do not use a separate sha1[] arrayJunio C Hamano, May 4, 2015

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.