Add build system scaffolding and libc headers

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/libc/wctype/iswxdigit.c b/lib/libc/wctype/iswxdigit.c
new file mode 100644
index 00000000..fae88730
--- /dev/null
+++ b/lib/libc/wctype/iswxdigit.c
@@ -0,0 +1,12 @@
+#include <libc.h>
+#include <wctype.h>
+
+int iswxdigit(wint_t wc)
+{
+	return (unsigned)(wc - '0') < 10 || (unsigned)((wc | 32) - 'a') < 6;
+}
+
+weak int iswxdigit_l(wint_t wc, locale_t unused locale)
+{
+	return iswxdigit(wc);
+}