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 26/42] sha1-file: add functions for hex empty tree and blob OIDs
Date: Wed, 2 May 2018 00:25:54 +0000 [thread overview]
Message-ID: <20180502002610.915892-27-sandals@crustytoothpaste.net> (raw)
In-Reply-To: <20180502002610.915892-1-sandals@crustytoothpaste.net>
Oftentimes, we'll want to refer to an empty tree or empty blob by its
hex name without having to call oid_to_hex or explicitly refer to
the_hash_algo. Add helper functions that format these values into
static buffers and return them for easy use.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
cache.h | 3 +++
sha1-file.c | 12 ++++++++++++
2 files changed, 15 insertions(+)
diff --git a/cache.h b/cache.h
index 37d081b8e4..7115770fa6 100644
--- a/cache.h
+++ b/cache.h
@@ -1049,6 +1049,9 @@ static inline int is_empty_tree_oid(const struct object_id *oid)
return !oidcmp(oid, the_hash_algo->empty_tree);
}
+const char *empty_tree_oid_hex(void);
+const char *empty_blob_oid_hex(void);
+
/* set default permissions by passing mode arguments to open(2) */
int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
int git_mkstemp_mode(char *pattern, int mode);
diff --git a/sha1-file.c b/sha1-file.c
index 4328c61285..11598b43eb 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -100,6 +100,18 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
},
};
+const char *empty_tree_oid_hex(void)
+{
+ static char buf[GIT_MAX_HEXSZ + 1];
+ return oid_to_hex_r(buf, the_hash_algo->empty_tree);
+}
+
+const char *empty_blob_oid_hex(void)
+{
+ static char buf[GIT_MAX_HEXSZ + 1];
+ return oid_to_hex_r(buf, the_hash_algo->empty_blob);
+}
+
/*
* This is meant to hold a *small* number of objects that you would
* want read_sha1_file() to be able to return, but yet you do not want
next prev parent reply other threads:[~2018-05-02 0:27 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 ` [PATCH v2 24/42] diff: specify abbreviation size in terms of the_hash_algo brian m. carlson
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 ` brian m. carlson [this message]
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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