Implement yank/paste in visual bit editor ##visual

libr/core/vmenus.c

@@ -475,6 +475,8 @@ R_API bool r_core_visual_bit_editor(RCore *core) {
 	const int nbits = sizeof (ut64) * 8;
 	bool colorBits = false;
 	int analopType;
+	ut8 yankBuffer[8] = {0};
+	int yankSize = 0;
 	int i, j, x = 0;
 	RAnalOp analop;
 	ut8 buf[sizeof (ut64)];
@@ -856,6 +858,28 @@ R_API bool r_core_visual_bit_editor(RCore *core) {
 		case 'b':
 			bitsInLine = !bitsInLine;
 			break;
+		case 'y': // yank
+			{
+				const int nbyte = x / 8;
+				const int last = R_MIN (nbyte + wordsize, 8);
+				yankSize = last - nbyte + 1;
+				int i;
+				for (i = nbyte; i < last; i++) {
+					yankBuffer[i - nbyte] = buf[i];
+				}
+			}
+			break;
+		case 'Y': // paste
+			{
+				const int nbyte = x / 8;
+				const int last = R_MIN (nbyte + wordsize, yankSize + nbyte);
+				int i;
+				int j = 0;
+				for (i = nbyte; i < last; i++) {
+					buf[i] = yankBuffer[j++];
+				}
+			}
+			break;
 		case '?':
 			r_cons_clear00 ();
 			r_cons_printf (
@@ -868,6 +892,7 @@ R_API bool r_core_visual_bit_editor(RCore *core) {
 			" J/K   - next/prev instruction (so+1,so-1)\n"
 			" h/l   - select next/previous bit\n"
 			" w/W   - increment 2 or 4 the wordsize\n"
+			" y/Y   - yank/paste selected bits\n"
 			" +/-   - increment or decrement byte value\n"
 			" </>   - rotate left/right byte value\n"
 			" i     - insert numeric value of byte\n"