1 files changed, 74 insertions, 0 deletions
diff --git a/libuuid/src/unparse.c b/libuuid/src/unparse.c
new file mode 100644
index 0000000..631514e
--- /dev/null
+++ b/libuuid/src/unparse.c
@@ -0,0 +1,74 @@
+/*
+ * unparse.c -- convert a UUID to string
+ *
+ * Copyright (C) 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * 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, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 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. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
+ * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR 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 NOT ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+
+#include "uuidP.h"
+
+static char const hexdigits_lower[16] = "0123456789abcdef";
+static char const hexdigits_upper[16] = "0123456789ABCDEF";
+
+static void uuid_fmt(const uuid_t uuid, char *buf, char const fmt[restrict])
+{
+	char *p = buf;
+
+	for (int i = 0; i < 16; i++) {
+		if (i == 4 || i == 6 || i == 8 || i == 10) {
+			*p++ = '-';
+		}
+		size_t tmp = uuid[i];
+		*p++ = fmt[tmp >> 4];
+		*p++ = fmt[tmp & 15];
+	}
+	*p = '\0';
+}
+
+void uuid_unparse_lower(const uuid_t uu, char *out)
+{
+	uuid_fmt(uu, out, hexdigits_lower);
+}
+
+void uuid_unparse_upper(const uuid_t uu, char *out)
+{
+	uuid_fmt(uu, out, hexdigits_upper);
+}
+
+void uuid_unparse(const uuid_t uu, char *out)
+{
+#ifdef UUID_UNPARSE_DEFAULT_UPPER
+	uuid_fmt(uu, out, hexdigits_upper);
+#else
+	uuid_fmt(uu, out, hexdigits_lower);
+#endif
+}