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-rw-r--r--stdlib/strtol.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/stdlib/strtol.c b/stdlib/strtol.c
index 97ad23453b..19e4a52880 100644
--- a/stdlib/strtol.c
+++ b/stdlib/strtol.c
@@ -184,6 +184,11 @@ extern int errno;
# define TOUPPER(Ch) towupper (Ch)
# endif
# else
+# if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII)
+# define IN_CTYPE_DOMAIN(c) 1
+# else
+# define IN_CTYPE_DOMAIN(c) isascii(c)
+# endif
# define L_(Ch) Ch
# define UCHAR_TYPE unsigned char
# define STRING_TYPE char
@@ -192,9 +197,9 @@ extern int errno;
# define ISALPHA(Ch) __isalpha_l ((Ch), loc)
# define TOUPPER(Ch) __toupper_l ((Ch), loc)
# else
-# define ISSPACE(Ch) isspace (Ch)
-# define ISALPHA(Ch) isalpha (Ch)
-# define TOUPPER(Ch) toupper (Ch)
+# define ISSPACE(Ch) (IN_CTYPE_DOMAIN (Ch) && isspace (Ch))
+# define ISALPHA(Ch) (IN_CTYPE_DOMAIN (Ch) && isalpha (Ch))
+# define TOUPPER(Ch) (IN_CTYPE_DOMAIN (Ch) ? toupper (Ch) : (Ch))
# endif
#endif