lib/util: Move mac_buf from nc code to util library

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

3 files changed, 51 insertions, 0 deletions

diff --git a/lib/Makefile.am b/lib/Makefile.am
index b492d69..e3ec2dc 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -43,6 +43,7 @@ libpbcore_la_SOURCES = \
 	system/system.h \
 	url/url.c \
 	url/url.h \
+	util/util.c \
 	util/util.h
 
 MAINTAINERCLEANFILES = Makefile.in
diff --git a/lib/util/util.c b/lib/util/util.c
new file mode 100644
index 0000000..75b1c23
--- /dev/null
+++ b/lib/util/util.c
@@ -0,0 +1,46 @@
+/*
+ *  Copyright (C) 2013 IBM Corporation
+ *
+ *  This program 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; version 2 of the License.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include <util/util.h>
+
+void mac_str(uint8_t *mac, unsigned int maclen, char *buf, unsigned int buflen)
+{
+	unsigned int i;
+	char *pos;
+
+	assert(buflen > sizeof("unknown"));
+
+	if (!maclen || maclen * 3 + 1 > buflen) {
+		strcpy(buf, "unknown");
+		return;
+	}
+
+	pos = buf;
+
+	for (i = 0; i < maclen; i++) {
+		snprintf(pos, 4, "%02x:", mac[i]);
+		pos += 3;
+	}
+
+	*(pos - 1) = '\0';
+
+	return;
+}
diff --git a/lib/util/util.h b/lib/util/util.h
index ba5ea4f..39966d0 100644
--- a/lib/util/util.h
+++ b/lib/util/util.h
@@ -18,6 +18,8 @@
 #ifndef UTIL_H
 #define UTIL_H
 
+#include <stdint.h>
+
 #ifndef container_of
 #define container_of(_ptr, _type, _member) ({ \
 	const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
@@ -47,5 +49,7 @@
 #define build_assert(x) \
 	do { (void)sizeof(char[(x)?1:-1]); } while (0)
 
+void mac_str(uint8_t *mac, unsigned int maclen, char *buf, unsigned int buflen);
+
 #endif /* UTIL_H */