This is like get_sha1_hex() but stricter in accepting lowercase letters
only.
Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxxx>
---
cache.h | 3 +++
hex.c | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/cache.h b/cache.h
index b6634c4..4231dfa 100644
--- a/cache.h
+++ b/cache.h
@@ -850,8 +850,11 @@ extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
* Return 0 on success. Reading stops if a NUL is encountered in the
* input, so it is safe to pass this function an arbitrary
* null-terminated string.
+ *
+ * The "low" version accepts numbers and lowercase letters only.
*/
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
+extern int get_sha1_lowhex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern int read_ref_full(const char *refname, unsigned char *sha1,
diff --git a/hex.c b/hex.c
index 9ebc050..1d7eae1 100644
--- a/hex.c
+++ b/hex.c
@@ -56,6 +56,17 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
return 0;
}
+int get_sha1_lowhex(const char *hex, unsigned char *sha1)
+{
+ int i;
+
+ /* uppercase letters (as well as '\0') have bit 5 clear */
+ for (i = 0; i < 20; i++)
+ if (!(hex[i] & 0x20))
+ return -1;
+ return get_sha1_hex(hex, sha1);
+}
+
char *sha1_to_hex(const unsigned char *sha1)
{
static int bufno;
--
1.8.4.38.g317e65b
--
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