core: add nm_utils_binary_to_hex() utilth/wip/util/nm-utils-binary-to-hexth/util/nm-utils-binary-to-hex

nm_utils_hwaddr_ntoa() is not suitable, because it only
allows up to NM_UTILS_HWADDR_LEN_MAX characters.

Also, let's do lower-case and no separator character.

2 files changed, 29 insertions, 1 deletions

diff --git a/src/nm-core-utils.c b/src/nm-core-utils.c
index 188e4737af..0273f6994b 100644
--- a/src/nm-core-utils.c
+++ b/src/nm-core-utils.c
@@ -2586,7 +2586,33 @@ nm_utils_is_specific_hostname (const char *name)
 	return FALSE;
 }
 
-/******************************************************************/
+/*****************************************************************************/
+
+char *
+nm_utils_binary_to_hex (gconstpointer addr, gsize length)
+{
+	const guint8 *in = addr;
+	char *out, *result;
+	const char *LOOKUP = "0123456789abcdef";
+	guint8 v;
+
+	if (length == 0)
+		return g_strdup ("");
+	if (!addr)
+		g_return_val_if_reached (g_strdup (""));
+
+	result = out = g_malloc (length * 2 + 1);
+	while (length--) {
+		v = *in++;
+		*out++ = LOOKUP[v >> 4];
+		*out++ = LOOKUP[v & 0x0F];
+	}
+
+	*out = 0;
+	return result;
+}
+
+/*****************************************************************************/
 
 /* Returns the "u" (universal/local) bit value for a Modified EUI-64 */
 static gboolean
diff --git a/src/nm-core-utils.h b/src/nm-core-utils.h
index 486942a22a..207cfae173 100644
--- a/src/nm-core-utils.h
+++ b/src/nm-core-utils.h
@@ -307,6 +307,8 @@ const char *nm_utils_ip4_property_path (const char *ifname, const char *property
 
 gboolean nm_utils_is_specific_hostname (const char *name);
 
+char *nm_utils_binary_to_hex (gconstpointer addr, gsize length);
+
 /* IPv6 Interface Identifer helpers */
 
 /**