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From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: git@vger.kernel.org
Cc: Jeff King <peff@peff.net>, Michael Haggerty <mhagger@alum.mit.edu>
Subject: [PATCH v2 14/19] hex: introduce parse_oid_hex
Date: Tue, 14 Feb 2017 02:31:36 +0000	[thread overview]
Message-ID: <20170214023141.842922-15-sandals@crustytoothpaste.net> (raw)
In-Reply-To: <20170214023141.842922-1-sandals@crustytoothpaste.net>

Introduce a function, parse_oid_hex, which parses a hexadecimal object
ID and if successful, sets a pointer to just beyond the last character.
This allows for simpler, more robust parsing without needing to
hard-code integer values throughout the codebase.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 cache.h | 8 ++++++++
 hex.c   | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/cache.h b/cache.h
index 61fc86e6d7..5dc89a058c 100644
--- a/cache.h
+++ b/cache.h
@@ -1319,6 +1319,14 @@ extern char *oid_to_hex_r(char *out, const struct object_id *oid);
 extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */
 extern char *oid_to_hex(const struct object_id *oid);	/* same static buffer as sha1_to_hex */
 
+/*
+ * Parse a hexadecimal object ID starting from hex, updating the pointer
+ * specified by p when parsing stops.  The resulting object ID is stored in oid.
+ * Returns 0 on success.  Parsing will stop on the first NUL or other invalid
+ * character.
+ */
+extern int parse_oid_hex(const char *hex, struct object_id *oid, const char **p);
+
 extern int interpret_branch_name(const char *str, int len, struct strbuf *);
 extern int get_oid_mb(const char *str, struct object_id *oid);
 
diff --git a/hex.c b/hex.c
index 845b01a874..54252b1445 100644
--- a/hex.c
+++ b/hex.c
@@ -53,6 +53,14 @@ int get_oid_hex(const char *hex, struct object_id *oid)
 	return get_sha1_hex(hex, oid->hash);
 }
 
+int parse_oid_hex(const char *hex, struct object_id *oid, const char **p)
+{
+	int ret = get_oid_hex(hex, oid);
+	if (!ret)
+		*p = hex + GIT_SHA1_HEXSZ;
+	return ret;
+}
+
 char *sha1_to_hex_r(char *buffer, const unsigned char *sha1)
 {
 	static const char hex[] = "0123456789abcdef";
-- 
2.11.0


  parent reply	other threads:[~2017-02-14  2:32 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-14  2:31 [PATCH v2 00/19] object_id part 6 brian m. carlson
2017-02-14  2:31 ` [PATCH v2 01/19] builtin/commit: convert to struct object_id brian m. carlson
2017-02-14  2:31 ` [PATCH v2 02/19] builtin/diff-tree: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 03/19] builtin/describe: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 04/19] builtin/fast-export: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 05/19] builtin/fmt-merge-message: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 06/19] builtin/grep: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 07/19] builtin/branch: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 08/19] builtin/clone: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 09/19] builtin/merge: " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 10/19] Convert remaining callers of resolve_refdup to object_id brian m. carlson
2017-02-14  2:31 ` [PATCH v2 11/19] builtin/replace: convert to struct object_id brian m. carlson
2017-02-17  8:44   ` Michael Haggerty
2017-02-14  2:31 ` [PATCH v2 12/19] reflog-walk: convert struct reflog_info " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 13/19] refs: convert each_reflog_ent_fn " brian m. carlson
2017-02-14  2:31 ` brian m. carlson [this message]
2017-02-17  9:26   ` [PATCH v2 14/19] hex: introduce parse_oid_hex Michael Haggerty
2017-02-14  2:31 ` [PATCH v2 15/19] refs: simplify parsing of reflog entries brian m. carlson
2017-02-17  9:41   ` Michael Haggerty
2017-02-14  2:31 ` [PATCH v2 16/19] sha1_file: introduce an nth_packed_object_oid function brian m. carlson
2017-02-14  2:31 ` [PATCH v2 17/19] Convert object iteration callbacks to struct object_id brian m. carlson
2017-02-14  2:31 ` [PATCH v2 18/19] builtin/merge-base: convert " brian m. carlson
2017-02-14  2:31 ` [PATCH v2 19/19] wt-status: " brian m. carlson
2017-02-14 22:02 ` [PATCH v2 00/19] object_id part 6 Junio C Hamano
2017-02-17  9:55 ` Michael Haggerty
2017-02-17 21:45   ` brian m. carlson

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