1 files changed, 60 insertions, 0 deletions
diff --git a/uuid/unparse.c b/uuid/unparse.c
new file mode 100644
index 0000000..3beca91
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+++ b/uuid/unparse.c
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+/*
+ * 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 "uuid.h"
+
+void uuid_unparse(const uuid_t uu, char *out)
+{
+	const uint8_t *uuid_array = (const uint8_t *)uu;
+	int uuid_index;
+	static const char *fmt = "0123456789ABCDEF";
+	
+	for ( uuid_index = 0; uuid_index < sizeof(uuid_t); ++uuid_index ) {
+		// insert '-' after the 4th, 6th, 8th, and 10th uuid byte
+		switch (uuid_index) {
+		case 4:
+		case 6:
+		case 8:
+		case 10:
+			*out++ = '-';
+			break;
+		}
+		// insert uuid byte as two hex characters
+		*out++ = fmt[*uuid_array >> 4];
+		*out++ = fmt[*uuid_array++ & 0xF];
+	}
+	*out = 0;
+}