1 files changed, 83 insertions, 0 deletions
diff --git a/src/libfreeswan/ultot.c b/src/libfreeswan/ultot.c
new file mode 100644
index 000000000..edffa4a2d
--- /dev/null
+++ b/src/libfreeswan/ultot.c
@@ -0,0 +1,83 @@
+/*
+ * convert unsigned long to text
+ * Copyright (C) 2000  Henry Spencer.
+ * 
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/lgpl.txt>.
+ * 
+ * This library 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 Library General Public
+ * License for more details.
+ *
+ * RCSID $Id: ultot.c,v 1.1 2004/03/15 20:35:26 as Exp $
+ */
+#include "internal.h"
+#include "freeswan.h"
+
+/*
+ - ultot - convert unsigned long to text
+ */
+size_t				/* length required for full conversion */
+ultot(n, base, dst, dstlen)
+unsigned long n;
+int base;
+char *dst;			/* need not be valid if dstlen is 0 */
+size_t dstlen;
+{
+	char buf[3*sizeof(unsigned long) + 1];
+	char *bufend = buf + sizeof(buf);
+	size_t len;
+	char *p;
+	static char hex[] = "0123456789abcdef";
+#	define	HEX32	(32/4)
+
+	p = bufend;
+	*--p = '\0';
+	switch (base) {
+	case 10:
+	case 'd':
+		do {
+			*--p = n%10 + '0';
+			n /= 10;
+		} while (n != 0);
+		break;
+	case 16:
+	case 17:
+	case 'x':
+		do {
+			*--p = hex[n&0xf];
+			n >>= 4;
+		} while (n != 0);
+		if (base == 17)
+			while (bufend - p < HEX32 + 1)
+				*--p = '0';
+		if (base == 'x') {
+			*--p = 'x';
+			*--p = '0';
+		}
+		break;
+	case 8:
+	case 'o':
+		do {
+			*--p = (n&07) + '0';
+			n >>= 3;
+		} while (n != 0);
+		if (base == 'o')
+			*--p = '0';
+		break;
+	default:
+		return 0;
+		break;
+	}
+
+	len = bufend - p;
+	if (dstlen > 0) {
+		if (len > dstlen)
+			*(p + dstlen - 1) = '\0';
+		strcpy(dst, p);
+	}
+	return len;
+}