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From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: <git@vger.kernel.org>
Subject: [RFC PATCH 01/22] hex: introduce parsing variants taking hash algorithms
Date: Mon, 13 Jan 2020 12:47:08 +0000
Message-ID: <20200113124729.3684846-2-sandals@crustytoothpaste.net> (raw)
In-Reply-To: <20200113124729.3684846-1-sandals@crustytoothpaste.net>

Introduce variants of get_oid_hex and parse_oid_hex that parse an
arbitrary hash algorithm, implementing internal functions to avoid
duplication.  These functions can be used in the transport code to parse
refs properly.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 cache.h |  7 +++++++
 hex.c   | 35 +++++++++++++++++++++++++++--------
 2 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/cache.h b/cache.h
index cbfaead23a..493d57febe 100644
--- a/cache.h
+++ b/cache.h
@@ -1480,6 +1480,9 @@ int set_disambiguate_hint_config(const char *var, const char *value);
 int get_sha1_hex(const char *hex, unsigned char *sha1);
 int get_oid_hex(const char *hex, struct object_id *sha1);
 
+/* Like get_oid_hex, but for an arbitrary hash algorithm. */
+int get_oid_hex_algop(const char *hex, struct object_id *oid, const struct git_hash_algo *algop);
+
 /*
  * Read `len` pairs of hexadecimal digits from `hex` and write the
  * values to `binary` as `len` bytes. Return 0 on success, or -1 if
@@ -1515,6 +1518,10 @@ char *oid_to_hex(const struct object_id *oid);						/* same static buffer */
  */
 int parse_oid_hex(const char *hex, struct object_id *oid, const char **end);
 
+/* Like parse_oid_hex, but for an arbitrary hash algorithm. */
+int parse_oid_hex_algop(const char *hex, struct object_id *oid, const char **end,
+			const struct git_hash_algo *algo);
+
 /*
  * This reads short-hand syntax that not only evaluates to a commit
  * object name, but also can act as if the end user spelled the name
diff --git a/hex.c b/hex.c
index fd7f00c43f..10e24dc2e4 100644
--- a/hex.c
+++ b/hex.c
@@ -47,30 +47,49 @@ int hex_to_bytes(unsigned char *binary, const char *hex, size_t len)
 	return 0;
 }
 
-int get_sha1_hex(const char *hex, unsigned char *sha1)
+static int get_hash_hex_algop(const char *hex, unsigned char *hash,
+			      const struct git_hash_algo *algop)
 {
 	int i;
-	for (i = 0; i < the_hash_algo->rawsz; i++) {
+	for (i = 0; i < algop->rawsz; i++) {
 		int val = hex2chr(hex);
 		if (val < 0)
 			return -1;
-		*sha1++ = val;
+		*hash++ = val;
 		hex += 2;
 	}
 	return 0;
 }
 
+int get_sha1_hex(const char *hex, unsigned char *sha1)
+{
+	return get_hash_hex_algop(hex, sha1, the_hash_algo);
+}
+
+int get_oid_hex_algop(const char *hex, struct object_id *oid,
+		      const struct git_hash_algo *algop)
+{
+	return get_hash_hex_algop(hex, oid->hash, algop);
+}
+
 int get_oid_hex(const char *hex, struct object_id *oid)
 {
-	return get_sha1_hex(hex, oid->hash);
+	return get_oid_hex_algop(hex, oid, the_hash_algo);
+}
+
+int parse_oid_hex_algop(const char *hex, struct object_id *oid,
+			const char **end,
+			const struct git_hash_algo *algop)
+{
+	int ret = get_hash_hex_algop(hex, oid->hash, algop);
+	if (!ret)
+		*end = hex + algop->hexsz;
+	return ret;
 }
 
 int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
 {
-	int ret = get_oid_hex(hex, oid);
-	if (!ret)
-		*end = hex + the_hash_algo->hexsz;
-	return ret;
+	return parse_oid_hex_algop(hex, oid, end, the_hash_algo);
 }
 
 char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,

  reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-13 12:47 [RFC PATCH 00/22] SHA-256 stage 4 implementation, part 1/3 brian m. carlson
2020-01-13 12:47 ` brian m. carlson [this message]
2020-01-13 12:47 ` [RFC PATCH 02/22] hex: add functions to parse hex object IDs in any algorithm brian m. carlson
2020-01-15 21:40   ` Junio C Hamano
2020-01-16  0:22     ` brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 03/22] repository: require a build flag to use SHA-256 brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 04/22] t: use hash-specific lookup tables to define test constants brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 05/22] t6300: abstract away SHA-1-specific constants brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 06/22] t6300: make hash algorithm independent brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 07/22] t/helper/test-dump-split-index: initialize git repository brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 08/22] t/helper: initialize repository if necessary brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 09/22] t/helper: make repository tests hash independent brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 10/22] setup: allow check_repository_format to read repository format brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 11/22] builtin/init-db: allow specifying hash algorithm on command line brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 12/22] builtin/init-db: add environment variable for new repo hash brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 13/22] init-db: move writing repo version into a function brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 14/22] worktree: allow repository version 1 brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 15/22] commit: use expected signature header for SHA-256 brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 16/22] gpg-interface: improve interface for parsing tags brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 17/22] tag: store SHA-256 signatures in a header brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 18/22] fast-import: permit reading multiple marks files brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 19/22] fast-import: add helper function for inserting mark object entries brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 20/22] fast-import: make find_marks work on any mark set brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 21/22] fast-import: add a generic function to iterate over marks brian m. carlson
2020-01-13 12:47 ` [RFC PATCH 22/22] fast-import: add options for rewriting submodules brian m. carlson

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