1 files changed, 16 insertions, 0 deletions

diff --git a/str_len.c b/str_len.c
new file mode 100644
index 0000000..dedd005
--- /dev/null
+++ b/str_len.c
@@ -0,0 +1,16 @@
+/* Public domain. */
+
+#include "str.h"
+
+unsigned int str_len(const char *s)
+{
+  register const char *t;
+
+  t = s;
+  for (;;) {
+    if (!*t) return t - s; ++t;
+    if (!*t) return t - s; ++t;
+    if (!*t) return t - s; ++t;
+    if (!*t) return t - s; ++t;
+  }
+}