1 files changed, 46 insertions, 0 deletions
diff --git a/lib/sh/strcasestr.c b/lib/sh/strcasestr.c
new file mode 100644
index 0000000..c819b3e
--- /dev/null
+++ b/lib/sh/strcasestr.c
@@ -0,0 +1,46 @@
+/* strcasestr.c - Find if one string appears as a substring of another string,
+		  without regard to case. */
+
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Bash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <bashansi.h>
+#include <chartypes.h>
+
+#include <stdc.h>
+
+/* Determine if s2 occurs in s1.  If so, return a pointer to the
+   match in s1.  The compare is case insensitive.  This is a
+   case-insensitive strstr(3). */
+char *
+strcasestr (s1, s2)
+     const char *s1;
+     const char *s2;
+{
+  register int i, l, len, c;
+
+  c = TOLOWER ((unsigned char)s2[0]);
+  len = strlen (s1);
+  l = strlen (s2);
+  for (i = 0; (len - i) >= l; i++)
+    if ((TOLOWER ((unsigned char)s1[i]) == c) && (strncasecmp (s1 + i, s2, l) == 0))
+      return ((char *)s1 + i);
+  return ((char *)0);
+}