[PATCH 09/38] introduce get_sha1_lowhex()
From: Nicolas Pitre <nico@fluxnic.net>
Date: 2016-06-15 22:58:38
Subsystem:
the rest · Maintainer:
Linus Torvalds
This is like get_sha1_hex() but stricter in accepting lowercase letters only. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> --- 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