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-rw-r--r--src/ctype/iswxdigit.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/ctype/iswxdigit.c b/src/ctype/iswxdigit.c
new file mode 100644
index 00000000..229a469f
--- /dev/null
+++ b/src/ctype/iswxdigit.c
@@ -0,0 +1,7 @@
+#include <wchar.h>
+#include <wctype.h>
+
+int iswxdigit(wint_t wc)
+{
+ return (unsigned)(wc-'0') < 10 || (unsigned)((wc|32)-'a') < 6;
+}