[hackers] [scc] [libc] Add strlen() || Roberto E. Vargas Caballero

[git]

commit ff12208b737305ea29849e5ef65abcc37119229a
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Thu Feb 16 21:11:49 2017 +0100
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Thu Feb 16 21:11:49 2017 +0100

    [libc] Add strlen()

diff --git a/libc/src/Makefile b/libc/src/Makefile
index 78fc9ae..8a863fa 100644
--- a/libc/src/Makefile
+++ b/libc/src/Makefile
@@ -1,7 +1,7 @@
 # See LICENSE file for copyright and license details.
 .POSIX:
 
-LIBCOBJ = assert.o strcpy.o strcmp.o
+LIBCOBJ = assert.o strcpy.o strcmp.o strlen.o
 
 all: libc.a
 
diff --git a/libc/src/strlen.c b/libc/src/strlen.c
new file mode 100644
index 0000000..685ac62
--- /dev/null
+++ b/libc/src/strlen.c
@@ -0,0 +1,13 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string.h>
+
+size_t
+strlen(const char *s)
+{
+       const char *t;
+
+       for (t = s; *t; ++t)
+               /* nothing */;
+       return t - s;
+}