1 files changed, 73 insertions, 0 deletions

diff --git a/src/lib/libc/string/strxfrm.c b/src/lib/libc/string/strxfrm.c
new file mode 100644
index 0000000000..6b258edecc
--- /dev/null
+++ b/src/lib/libc/string/strxfrm.c
@@ -0,0 +1,73 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$OpenBSD: strxfrm.c,v 1.2 1996/08/19 08:34:29 tholo Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <string.h>
+
+/*
+ * Transform src, storing the result in dst, such that
+ * strcmp() on transformed strings returns what strcoll()
+ * on the original untransformed strings would return.
+ */
+size_t
+strxfrm(dst, src, n)
+        register char *dst;
+        register const char *src;
+        register size_t n;
+{
+        register size_t r = 0;
+        register int c;
+
+        /*
+         * Since locales are unimplemented, this is just a copy.
+         */
+        if (n != 0) {
+                while ((c = *src++) != 0) {
+                        r++;
+                        if (--n == 0) {
+                                while (*src++ != 0)
+                                        r++;
+                                break;
+                        }
+                        *dst++ = c;
+                }
+                *dst = 0;
+        }
+        return (r);
+}