allow setting the "*" register as an alternative to nEB

this is more consistent with SciTECO's idea of abstract registers
and allows the currend buffer to be saved on the Q-Register stack.
This allows the idiom: [* ! ...change current buffer... ! ]*

1 files changed, 15 insertions, 7 deletions

diff --git a/src/qregisters.cpp b/src/qregisters.cpp
index 24ca904..846a5a4 100644
--- a/src/qregisters.cpp
+++ b/src/qregisters.cpp
@@ -229,16 +229,24 @@ QRegister::load(const gchar *filename)
 }
 
 tecoInt
-QRegisterBufferInfo::get_integer(void)
+QRegisterBufferInfo::set_integer(tecoInt v)
 {
-	tecoInt id = 1;
+	if (!ring.edit(v))
+		throw Error("Invalid buffer id %" TECO_INTEGER_FORMAT, v);
 
-	for (Buffer *buffer = ring.first();
-	     buffer != ring.current;
-	     buffer = buffer->next())
-		id++;
+	return v;
+}
 
-	return id;
+void
+QRegisterBufferInfo::undo_set_integer(void)
+{
+	current_doc_undo_edit();
+}
+
+tecoInt
+QRegisterBufferInfo::get_integer(void)
+{
+	return ring.get_id();
 }
 
 gchar *