[PATCH v2 14/19] hex: introduce parse_oid_hex

From

brian m. carlson <sandals@crustytoothpaste.net>

Date

Feb 14, 2017, 02:31 UTC

Message-ID

<20170214023141.842922-15-sandals@crustytoothpaste.net>

In-Reply-To

<20170214023141.842922-1-sandals@crustytoothpaste.net>

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