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[PATCH v2 15/42] split-index: convert struct split_index to object_id

From
brian m. carlson <sandals@crustytoothpaste.net>
Date
May 2, 2018, 00:25 UTC
Message-ID
<20180502002610.915892-16-sandals@crustytoothpaste.net>
In-Reply-To
<20180502002610.915892-1-sandals@crustytoothpaste.net>

Convert the base_sha1 member of struct split_index to use struct object_id and rename it base_oid. Include cache.h to make the structure visible.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 builtin/rev-parse.c              |  4 ++--
 read-cache.c                     | 22 +++++++++++-----------
 split-index.c                    | 10 +++++-----
 split-index.h                    |  4 +++-
 t/helper/test-dump-split-index.c |  2 +-
 5 files changed, 22 insertions(+), 20 deletions(-)
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index 36b2087782..55c0b90441 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -887,8 +887,8 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				if (read_cache() < 0)
 					die(_("Could not read the index"));
 				if (the_index.split_index) {
-					const unsigned char *sha1 = the_index.split_index->base_sha1;
-					const char *path = git_path("sharedindex.%s", sha1_to_hex(sha1));
+					const struct object_id *oid = &the_index.split_index->base_oid;
+					const char *path = git_path("sharedindex.%s", oid_to_hex(oid));
 					strbuf_reset(&buf);
 					puts(relative_path(path, prefix, &buf));
 				}
diff --git a/read-cache.c b/read-cache.c
index 10f1c6bb8a..f47666b975 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1878,7 +1878,7 @@ int read_index_from(struct index_state *istate, const char *path,
 	uint64_t start = getnanotime();
 	struct split_index *split_index;
 	int ret;
-	char *base_sha1_hex;
+	char *base_oid_hex;
 	char *base_path;
 
 	/* istate->initialized covers both .git/index and .git/sharedindex.xxx */
@@ -1889,7 +1889,7 @@ int read_index_from(struct index_state *istate, const char *path,
 	trace_performance_since(start, "read cache %s", path);
 
 	split_index = istate->split_index;
-	if (!split_index || is_null_sha1(split_index->base_sha1)) {
+	if (!split_index || is_null_oid(&split_index->base_oid)) {
 		post_read_index_from(istate);
 		return ret;
 	}
@@ -1899,12 +1899,12 @@ int read_index_from(struct index_state *istate, const char *path,
 	else
 		split_index->base = xcalloc(1, sizeof(*split_index->base));
 
-	base_sha1_hex = sha1_to_hex(split_index->base_sha1);
-	base_path = xstrfmt("%s/sharedindex.%s", gitdir, base_sha1_hex);
+	base_oid_hex = oid_to_hex(&split_index->base_oid);
+	base_path = xstrfmt("%s/sharedindex.%s", gitdir, base_oid_hex);
 	ret = do_read_index(split_index->base, base_path, 1);
-	if (hashcmp(split_index->base_sha1, split_index->base->sha1))
+	if (hashcmp(split_index->base_oid.hash, split_index->base->sha1))
 		die("broken index, expect %s in %s, got %s",
-		    base_sha1_hex, base_path,
+		    base_oid_hex, base_path,
 		    sha1_to_hex(split_index->base->sha1));
 
 	freshen_shared_index(base_path, 0);
@@ -2499,7 +2499,7 @@ static int write_shared_index(struct index_state *istate,
 	ret = rename_tempfile(temp,
 			      git_path("sharedindex.%s", sha1_to_hex(si->base->sha1)));
 	if (!ret) {
-		hashcpy(si->base_sha1, si->base->sha1);
+		hashcpy(si->base_oid.hash, si->base->sha1);
 		clean_shared_index_files(sha1_to_hex(si->base->sha1));
 	}
 
@@ -2554,13 +2554,13 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
 	if (!si || alternate_index_output ||
 	    (istate->cache_changed & ~EXTMASK)) {
 		if (si)
-			hashclr(si->base_sha1);
+			oidclr(&si->base_oid);
 		ret = do_write_locked_index(istate, lock, flags);
 		goto out;
 	}
 
 	if (getenv("GIT_TEST_SPLIT_INDEX")) {
-		int v = si->base_sha1[0];
+		int v = si->base_oid.hash[0];
 		if ((v & 15) < 6)
 			istate->cache_changed |= SPLIT_INDEX_ORDERED;
 	}
@@ -2575,7 +2575,7 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
 
 		temp = mks_tempfile(git_path("sharedindex_XXXXXX"));
 		if (!temp) {
-			hashclr(si->base_sha1);
+			oidclr(&si->base_oid);
 			ret = do_write_locked_index(istate, lock, flags);
 			goto out;
 		}
@@ -2595,7 +2595,7 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
 	/* Freshen the shared index only if the split-index was written */
 	if (!ret && !new_shared_index) {
 		const char *shared_index = git_path("sharedindex.%s",
-						    sha1_to_hex(si->base_sha1));
+						    oid_to_hex(&si->base_oid));
 		freshen_shared_index(shared_index, 1);
 	}
 
diff --git a/split-index.c b/split-index.c
index 3eb8ff1b43..660c75f31f 100644
--- a/split-index.c
+++ b/split-index.c
@@ -18,12 +18,12 @@ int read_link_extension(struct index_state *istate,
 	struct split_index *si;
 	int ret;
 
-	if (sz < 20)
+	if (sz < the_hash_algo->rawsz)
 		return error("corrupt link extension (too short)");
 	si = init_split_index(istate);
-	hashcpy(si->base_sha1, data);
-	data += 20;
-	sz -= 20;
+	hashcpy(si->base_oid.hash, data);
+	data += the_hash_algo->rawsz;
+	sz -= the_hash_algo->rawsz;
 	if (!sz)
 		return 0;
 	si->delete_bitmap = ewah_new();
@@ -45,7 +45,7 @@ int write_link_extension(struct strbuf *sb,
 			 struct index_state *istate)
 {
 	struct split_index *si = istate->split_index;
-	strbuf_add(sb, si->base_sha1, 20);
+	strbuf_add(sb, si->base_oid.hash, the_hash_algo->rawsz);
 	if (!si->delete_bitmap && !si->replace_bitmap)
 		return 0;
 	ewah_serialize_strbuf(si->delete_bitmap, sb);
diff --git a/split-index.h b/split-index.h
index 43d66826eb..7a435ca2c9 100644
--- a/split-index.h
+++ b/split-index.h
@@ -1,12 +1,14 @@
 #ifndef SPLIT_INDEX_H
 #define SPLIT_INDEX_H
 
+#include "cache.h"
+
 struct index_state;
 struct strbuf;
 struct ewah_bitmap;
 
 struct split_index {
-	unsigned char base_sha1[20];
+	struct object_id base_oid;
 	struct index_state *base;
 	struct ewah_bitmap *delete_bitmap;
 	struct ewah_bitmap *replace_bitmap;
diff --git a/t/helper/test-dump-split-index.c b/t/helper/test-dump-split-index.c
index 4e2fdb5e30..754e9bb624 100644
--- a/t/helper/test-dump-split-index.c
+++ b/t/helper/test-dump-split-index.c
@@ -20,7 +20,7 @@ int cmd__dump_split_index(int ac, const char **av)
 		printf("not a split index\n");
 		return 0;
 	}
-	printf("base %s\n", sha1_to_hex(si->base_sha1));
+	printf("base %s\n", oid_to_hex(&si->base_oid));
 	for (i = 0; i < the_index.cache_nr; i++) {
 		struct cache_entry *ce = the_index.cache[i];
 		printf("%06o %s %d\t%s\n", ce->ce_mode,
Previous: brian m. carlsonNext: brian m. carlson
Message 10 of 45 in “object_id part 13”
  1. 00/42 object_id part 13brian m. carlson, May 2, 2018
  2. 01/42 cache: add a function to read an object ID from a bufferbrian m. carlson, May 2, 2018
  3. 02/42 server-info: remove unused members from struct pack_infobrian m. carlson, May 2, 2018
  4. 06/42 sha1-file: convert freshen functions to object_idbrian m. carlson, May 2, 2018
  5. 07/42 packfile: convert find_pack_entry to object_idbrian m. carlson, May 2, 2018
  6. 11/42 tree-walk: avoid hard-coded 20 constantbrian m. carlson, May 2, 2018
  7. 05/42 packfile: convert has_sha1_pack to object_idbrian m. carlson, May 2, 2018
  8. 13/42 fsck: convert static functions to struct object_idbrian m. carlson, May 2, 2018
  9. 17/42 pack-redundant: convert linked lists to use struct object_idbrian m. carlson, May 2, 2018
  10. 15/42 split-index: convert struct split_index to object_idbrian m. carlson, May 2, 2018
  11. 14/42 submodule-config: convert structures to object_idbrian m. carlson, May 2, 2018
  12. 18/42 index-pack: abstract away hash function constantbrian m. carlson, May 2, 2018
  13. 12/42 tree-walk: convert get_tree_entry_follow_symlinks to object_idbrian m. carlson, May 2, 2018
  14. 10/42 pack-redundant: abstract away hash algorithmbrian m. carlson, May 2, 2018
  15. 09/42 pack-objects: abstract away hash algorithmbrian m. carlson, May 2, 2018
  16. 27/42 builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algobrian m. carlson, May 2, 2018
  17. 28/42 builtin/merge: switch tree functions to use object_idbrian m. carlson, May 2, 2018
  18. 25/42 builtin/receive-pack: avoid hard-coded constants for push certsbrian m. carlson, May 2, 2018
  19. 35/42 sha1_file: convert cached object code to struct object_idbrian m. carlson, May 2, 2018
  20. 38/42 dir: use the_hash_algo for empty blob object IDbrian m. carlson, May 2, 2018
  21. 37/42 sequencer: use the_hash_algo for empty tree object IDbrian m. carlson, May 2, 2018
  22. 36/42 cache-tree: use is_empty_tree_oidbrian m. carlson, May 2, 2018
  23. 41/42 add--interactive: compute the empty tree valuebrian m. carlson, May 2, 2018
  24. 39/42 sha1_file: only expose empty object constants through git_hash_algobrian m. carlson, May 2, 2018
  25. 26/42 sha1-file: add functions for hex empty tree and blob OIDsbrian m. carlson, May 2, 2018
  26. 42/42 merge-one-file: compute empty blob object IDbrian m. carlson, May 2, 2018
  27. 40/42 Update shell scripts to compute empty tree object IDbrian m. carlson, May 2, 2018
  28. 34/42 builtin/reset: convert use of EMPTY_TREE_SHA1_BINbrian m. carlson, May 2, 2018
  29. 33/42 builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEXbrian m. carlson, May 2, 2018
  30. 32/42 wt-status: convert two uses of EMPTY_TREE_SHA1_HEXbrian m. carlson, May 2, 2018
  31. 31/42 submodule: convert several uses of EMPTY_TREE_SHA1_HEXbrian m. carlson, May 2, 2018
  32. 30/42 sequencer: convert one use of EMPTY_TREE_SHA1_HEXbrian m. carlson, May 2, 2018
  33. 29/42 merge: convert empty tree constant to the_hash_algobrian m. carlson, May 2, 2018
  34. 23/42 upload-pack: replace use of several hard-coded constantsbrian m. carlson, May 2, 2018
  35. 22/42 revision: replace use of hard-coded constantsbrian m. carlson, May 2, 2018
  36. 24/42 diff: specify abbreviation size in terms of the_hash_algobrian m. carlson, May 2, 2018
  37. 16/42 Update struct index_state to use struct object_idbrian m. carlson, May 2, 2018
  38. 21/42 http: eliminate hard-coded constantsbrian m. carlson, May 2, 2018
  39. 20/42 dir: convert struct untracked_cache_dir to object_idbrian m. carlson, May 2, 2018
  40. 19/42 commit: convert uses of get_sha1_hex to get_oid_hexbrian m. carlson, May 2, 2018
  41. 08/42 packfile: abstract away hash constant valuesbrian m. carlson, May 2, 2018
  42. 04/42 packfile: remove unused member from struct pack_entrybrian m. carlson, May 2, 2018
  43. 03/42 Remove unused member in struct object_contextbrian m. carlson, May 2, 2018
  44. Duy NguyenMay 2, 2018
  45. brian m. carlsonMay 2, 2018

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