Special-case printing of the GUID property

Rather than printing GUIDs as 16 signed decimal integers, print them in
{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} format.

Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/xrandr.c b/xrandr.c
index ddc6c64..0a182c3 100644
--- a/xrandr.c
+++ b/xrandr.c
@@ -2426,6 +2426,25 @@ print_edid(int nitems, const unsigned char *prop)
 }
 
 static void
+print_guid(const unsigned char *prop)
+{
+    int k;
+
+    printf("{");
+
+    for (k = 0; k < 16; k++)
+    {
+	printf("%02" PRIX8, prop[k]);
+	if (k == 3 || k == 5 || k == 7 || k == 9)
+	{
+	    printf("-");
+	}
+    }
+
+    printf("}\n");
+}
+
+static void
 print_output_property(const char *atom_name,
                       int value_format,
                       Atom value_type,
@@ -2444,6 +2463,12 @@ print_output_property(const char *atom_name,
 	print_edid (nitems, prop);
 	return;
     }
+    else if (strcmp (atom_name, "GUID") == 0 && value_format == 8 &&
+	     value_type == XA_INTEGER && nitems == 16)
+    {
+	print_guid (prop);
+	return;
+    }
 
     for (k = 0; k < nitems; k++)
     {