[PATCH 05/15] lib: Drop unnecessary check for hex digit

[Simon Glass]

If we see 0x then we can assume this is the start of a hex value. It
does not seem necessary to check for a hex digit after that since it will
happen when parsing the value anyway.

Drop this check to simplify the code and reduce size. Add a few more test
cases for when a 0x prefix is used.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 lib/strto.c   | 2 +-
 test/str_ut.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/strto.c b/lib/strto.c
index f4fb3faf2fa..ab6867a963f 100644
--- a/lib/strto.c
+++ b/lib/strto.c
@@ -18,7 +18,7 @@ static const char *_parse_integer_fixup_radix(const char *s, unsigned int *base)
 {
 	if (*base == 0) {
 		if (s[0] == '0') {
-			if (tolower(s[1]) == 'x' && isxdigit(s[2]))
+			if (tolower(s[1]) == 'x')
 				*base = 16;
 			else
 				*base = 8;
diff --git a/test/str_ut.c b/test/str_ut.c
index 19f2c127135..8133b213bfa 100644
--- a/test/str_ut.c
+++ b/test/str_ut.c
@@ -84,6 +84,8 @@ static int str_simple_strtoul(struct unit_test_state *uts)
 		/* Base 10 and base 16 */
 		ut_assertok(run_strtoul(uts, str2, 10, 1099, 4, upper));
 		ut_assertok(run_strtoul(uts, str2, 16, 0x1099ab, 6, upper));
+		ut_assertok(run_strtoul(uts, str3, 16, 0xb, 3, upper));
+		ut_assertok(run_strtoul(uts, str3, 10, 0, 1, upper));
 
 		/* Invalid string */
 		ut_assertok(run_strtoul(uts, str1, 10, 0, 0, upper));
-- 
2.32.0.402.g57bb445576-goog