1 files changed, 19 insertions, 0 deletions
diff --git a/lib/str_cmp.c b/lib/str_cmp.c
new file mode 100644
index 0000000..1fa82de
--- /dev/null
+++ b/lib/str_cmp.c
@@ -0,0 +1,19 @@
+int
+str_cmp(s1, s2)
+  char *s1, *s2;
+{
+  int c1, c2, diff;
+
+  do
+  {
+    c1 = *s1++;
+    c2 = *s2++;
+    if (c1 >= 'A' && c1 <= 'Z')
+      c1 |= 0x20;
+    if (c2 >= 'A' && c2 <= 'Z')
+      c2 |= 0x20;
+    if (diff = c1 - c2)
+      return (diff);
+  } while (c1);
+  return 0;
+}