1 files changed, 20 insertions, 0 deletions
diff --git a/strings/strcmp.c b/strings/strcmp.c
new file mode 100644
index 00000000000..d911b2daa17
--- /dev/null
+++ b/strings/strcmp.c
@@ -0,0 +1,20 @@
+/*  File   : strcmp.c
+    Author : Richard A. O'Keefe.
+    Updated: 10 April 1984
+    Defines: strcmp()
+
+    strcmp(s, t) returns > 0, = 0,  or < 0  when s > t, s = t,	or s < t
+    according  to  the	ordinary  lexicographical  order.   To	test for
+    equality, the macro streql(s,t) is clearer than  !strcmp(s,t).  Note
+    that  if the string contains characters outside the range 0..127 the
+    result is machine-dependent; PDP-11s and  VAXen  use  signed  bytes,
+    some other machines use unsigned bytes.
+*/
+
+#include "strings.h"
+
+int strcmp(register const char *s, register const char *t)
+{
+  while (*s == *t++) if (!*s++) return 0;
+  return s[0]-t[-1];
+}