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-rw-r--r--src/ctype/iswalnum.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/ctype/iswalnum.c b/src/ctype/iswalnum.c
new file mode 100644
index 00000000..d3b56674
--- /dev/null
+++ b/src/ctype/iswalnum.c
@@ -0,0 +1,9 @@
+#include <wchar.h>
+#include <wctype.h>
+
+#undef iswalnum
+
+int iswalnum(wint_t wc)
+{
+ return (unsigned)wc-'0' < 10 || iswalpha(wc);
+}