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-rw-r--r--src/string.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/src/string.c b/src/string.c
index 63c0e4573..5eaed533a 100644
--- a/src/string.c
+++ b/src/string.c
@@ -1854,13 +1854,10 @@ mrb_cstr_to_inum(mrb_state *mrb, const char *str, int base, int badcheck)
unsigned long n = 0;
mrb_int val;
-#undef ISDIGIT
-#define ISDIGIT(c) ('0' <= (c) && (c) <= '9')
#define conv_digit(c) \
- (!ISASCII(c) ? -1 : \
- isdigit(c) ? ((c) - '0') : \
- islower(c) ? ((c) - 'a' + 10) : \
- isupper(c) ? ((c) - 'A' + 10) : \
+ (ISDIGIT(c) ? ((c) - '0') : \
+ ISLOWER(c) ? ((c) - 'a' + 10) : \
+ ISUPPER(c) ? ((c) - 'A' + 10) : \
-1)
if (!str) {