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@xxxxxxxxxxxxxxxxxxxx>
---
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
