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-rw-r--r--lib/regex_internal.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/regex_internal.h b/lib/regex_internal.h
index 0c72e3f7b01..7b50b478114 100644
--- a/lib/regex_internal.h
+++ b/lib/regex_internal.h
@@ -77,6 +77,14 @@
# define isblank(ch) ((ch) == ' ' || (ch) == '\t')
#endif
+/* regex code assumes isascii has its usual numeric meaning,
+ even if the portable character set uses EBCDIC encoding,
+ and even if wint_t is wider than int. */
+#ifndef _LIBC
+# undef isascii
+# define isascii(c) (((c) & ~0x7f) == 0)
+#endif
+
#ifdef _LIBC
# ifndef _RE_DEFINE_LOCALE_FUNCTIONS
# define _RE_DEFINE_LOCALE_FUNCTIONS 1