1 files changed, 23 insertions, 0 deletions
diff --git a/lib/libc/locale/tolower.c b/lib/libc/locale/tolower.c
new file mode 100644
index 0000000..995cdce
--- /dev/null
+++ b/lib/libc/locale/tolower.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <rune.h>
+
+_BSD_RUNE_T_
+___tolower(c)
+	_BSD_RUNE_T_ c;
+{
+	int x;
+	_RuneRange *rr = &_CurrentRuneLocale->maplower_ext;
+	_RuneEntry *re = rr->ranges;
+
+	if (c == EOF)
+		return(EOF);
+	for (x = 0; x < rr->nranges; ++x, ++re) {
+		if (c < re->min)
+			return(c);
+		if (c <= re->max)
+			return(re->map + c - re->min);
+	}
+	return(c);
+}
+
+