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From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: git@vger.kernel.org
Cc: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
	"Junio C Hamano" <gitster@pobox.com>,
	"Eric Sunshine" <sunshine@sunshineco.com>,
	"Martin Ågren" <martin.agren@gmail.com>,
	"SZEDER Gábor" <szeder.dev@gmail.com>
Subject: [PATCH v2 24/42] diff: specify abbreviation size in terms of the_hash_algo
Date: Wed,  2 May 2018 00:25:52 +0000	[thread overview]
Message-ID: <20180502002610.915892-25-sandals@crustytoothpaste.net> (raw)
In-Reply-To: <20180502002610.915892-1-sandals@crustytoothpaste.net>

Instead of using hard-coded 40 constants, refer to the_hash_algo for the
current hash size.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 diff.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/diff.c b/diff.c
index 314c57e3c0..b1666b9b2d 100644
--- a/diff.c
+++ b/diff.c
@@ -3897,13 +3897,14 @@ static void fill_metainfo(struct strbuf *msg,
 		*must_show_header = 0;
 	}
 	if (one && two && oidcmp(&one->oid, &two->oid)) {
-		int abbrev = o->flags.full_index ? 40 : DEFAULT_ABBREV;
+		const unsigned hexsz = the_hash_algo->hexsz;
+		int abbrev = o->flags.full_index ? hexsz : DEFAULT_ABBREV;
 
 		if (o->flags.binary) {
 			mmfile_t mf;
 			if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) ||
 			    (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two)))
-				abbrev = 40;
+				abbrev = hexsz;
 		}
 		strbuf_addf(msg, "%s%sindex %s..%s", line_prefix, set,
 			    diff_abbrev_oid(&one->oid, abbrev),
@@ -4138,6 +4139,11 @@ void diff_setup_done(struct diff_options *options)
 			      DIFF_FORMAT_NAME_STATUS |
 			      DIFF_FORMAT_CHECKDIFF |
 			      DIFF_FORMAT_NO_OUTPUT;
+	/*
+	 * This must be signed because we're comparing against a potentially
+	 * negative value.
+	 */
+	const int hexsz = the_hash_algo->hexsz;
 
 	if (options->set_default)
 		options->set_default(options);
@@ -4218,8 +4224,8 @@ void diff_setup_done(struct diff_options *options)
 			 */
 			read_cache();
 	}
-	if (40 < options->abbrev)
-		options->abbrev = 40; /* full */
+	if (hexsz < options->abbrev)
+		options->abbrev = hexsz; /* full */
 
 	/*
 	 * It does not make sense to show the first hit we happened
@@ -4797,8 +4803,8 @@ int diff_opt_parse(struct diff_options *options,
 		options->abbrev = strtoul(arg, NULL, 10);
 		if (options->abbrev < MINIMUM_ABBREV)
 			options->abbrev = MINIMUM_ABBREV;
-		else if (40 < options->abbrev)
-			options->abbrev = 40;
+		else if (the_hash_algo->hexsz < options->abbrev)
+			options->abbrev = the_hash_algo->hexsz;
 	}
 	else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) {
 		options->a_prefix = optarg;

  parent reply	other threads:[~2018-05-02  0:28 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02  0:25 [PATCH v2 00/42] object_id part 13 brian m. carlson
2018-05-02  0:25 ` [PATCH v2 01/42] cache: add a function to read an object ID from a buffer brian m. carlson
2018-05-02  0:25 ` [PATCH v2 02/42] server-info: remove unused members from struct pack_info brian m. carlson
2018-05-02  0:25 ` [PATCH v2 03/42] Remove unused member in struct object_context brian m. carlson
2018-05-02  0:25 ` [PATCH v2 04/42] packfile: remove unused member from struct pack_entry brian m. carlson
2018-05-02  0:25 ` [PATCH v2 05/42] packfile: convert has_sha1_pack to object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 06/42] sha1-file: convert freshen functions " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 07/42] packfile: convert find_pack_entry " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 08/42] packfile: abstract away hash constant values brian m. carlson
2018-05-02  0:25 ` [PATCH v2 09/42] pack-objects: abstract away hash algorithm brian m. carlson
2018-05-02  0:25 ` [PATCH v2 10/42] pack-redundant: " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 11/42] tree-walk: avoid hard-coded 20 constant brian m. carlson
2018-05-02  0:25 ` [PATCH v2 12/42] tree-walk: convert get_tree_entry_follow_symlinks to object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 13/42] fsck: convert static functions to struct object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 14/42] submodule-config: convert structures to object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 15/42] split-index: convert struct split_index " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 16/42] Update struct index_state to use struct object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 17/42] pack-redundant: convert linked lists " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 18/42] index-pack: abstract away hash function constant brian m. carlson
2018-05-02  0:25 ` [PATCH v2 19/42] commit: convert uses of get_sha1_hex to get_oid_hex brian m. carlson
2018-05-02  0:25 ` [PATCH v2 20/42] dir: convert struct untracked_cache_dir to object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 21/42] http: eliminate hard-coded constants brian m. carlson
2018-05-02  0:25 ` [PATCH v2 22/42] revision: replace use of " brian m. carlson
2018-05-02  0:25 ` [PATCH v2 23/42] upload-pack: replace use of several " brian m. carlson
2018-05-02  0:25 ` brian m. carlson [this message]
2018-05-02  0:25 ` [PATCH v2 25/42] builtin/receive-pack: avoid hard-coded constants for push certs brian m. carlson
2018-05-02  0:25 ` [PATCH v2 26/42] sha1-file: add functions for hex empty tree and blob OIDs brian m. carlson
2018-05-02  0:25 ` [PATCH v2 27/42] builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo brian m. carlson
2018-05-02  0:25 ` [PATCH v2 28/42] builtin/merge: switch tree functions to use object_id brian m. carlson
2018-05-02  0:25 ` [PATCH v2 29/42] merge: convert empty tree constant to the_hash_algo brian m. carlson
2018-05-02  0:25 ` [PATCH v2 30/42] sequencer: convert one use of EMPTY_TREE_SHA1_HEX brian m. carlson
2018-05-02  0:25 ` [PATCH v2 31/42] submodule: convert several uses " brian m. carlson
2018-05-02  0:26 ` [PATCH v2 32/42] wt-status: convert two " brian m. carlson
2018-05-02  0:26 ` [PATCH v2 33/42] builtin/receive-pack: convert one use " brian m. carlson
2018-05-02  0:26 ` [PATCH v2 34/42] builtin/reset: convert use of EMPTY_TREE_SHA1_BIN brian m. carlson
2018-05-02  0:26 ` [PATCH v2 35/42] sha1_file: convert cached object code to struct object_id brian m. carlson
2018-05-02  0:26 ` [PATCH v2 36/42] cache-tree: use is_empty_tree_oid brian m. carlson
2018-05-02  0:26 ` [PATCH v2 37/42] sequencer: use the_hash_algo for empty tree object ID brian m. carlson
2018-05-02  0:26 ` [PATCH v2 38/42] dir: use the_hash_algo for empty blob " brian m. carlson
2018-05-02  0:26 ` [PATCH v2 39/42] sha1_file: only expose empty object constants through git_hash_algo brian m. carlson
2018-05-02  0:26 ` [PATCH v2 40/42] Update shell scripts to compute empty tree object ID brian m. carlson
2018-05-02  0:26 ` [PATCH v2 41/42] add--interactive: compute the empty tree value brian m. carlson
2018-05-02  0:26 ` [PATCH v2 42/42] merge-one-file: compute empty blob object ID brian m. carlson
2018-05-02 15:32 ` [PATCH v2 00/42] object_id part 13 Duy Nguyen
2018-05-02 23:42   ` brian m. carlson

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