1 files changed, 109 insertions, 0 deletions
diff --git a/contrib/nvi/vi/v_at.c b/contrib/nvi/vi/v_at.c
new file mode 100644
index 0000000..d266f27
--- /dev/null
+++ b/contrib/nvi/vi/v_at.c
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1992, 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)v_at.c	10.8 (Berkeley) 4/27/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+
+#include "../common/common.h"
+#include "vi.h"
+
+/*
+ * v_at -- @
+ *	Execute a buffer.
+ *
+ * PUBLIC: int v_at __P((SCR *, VICMD *));
+ */
+int
+v_at(sp, vp)
+	SCR *sp;
+	VICMD *vp;
+{
+	CB *cbp;
+	CHAR_T name;
+	TEXT *tp;
+	size_t len;
+	char nbuf[20];
+
+	/*
+	 * !!!
+	 * Historically, [@*]<carriage-return> and [@*][@*] executed the most
+	 * recently executed buffer in ex mode.  In vi mode, only @@ repeated
+	 * the last buffer.  We change historic practice and make @* work from
+	 * vi mode as well, it's simpler and more consistent.
+	 *
+	 * My intent is that *[buffer] will, in the future, pass the buffer to
+	 * whatever interpreter is loaded.
+	 */
+	name = F_ISSET(vp, VC_BUFFER) ? vp->buffer : '@';
+	if (name == '@' || name == '*') {
+		if (!F_ISSET(sp, SC_AT_SET)) {
+			ex_emsg(sp, NULL, EXM_NOPREVBUF);
+			return (1);
+		}
+		name = sp->at_lbuf;
+	}
+	F_SET(sp, SC_AT_SET);
+
+	CBNAME(sp, cbp, name);
+	if (cbp == NULL) {
+		ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF);
+		return (1);
+	}
+
+	/* Save for reuse. */
+	sp->at_lbuf = name;
+
+	/*
+	 * The buffer is executed in vi mode, while in vi mode, so simply
+	 * push it onto the terminal queue and continue.
+	 *
+	 * !!!
+	 * Historic practice is that if the buffer was cut in line mode,
+	 * <newlines> were appended to each line as it was pushed onto
+	 * the stack.  If the buffer was cut in character mode, <newlines>
+	 * were appended to all lines but the last one.
+	 *
+	 * XXX
+	 * Historic practice is that execution of an @ buffer could be
+	 * undone by a single 'u' command, i.e. the changes were grouped
+	 * together.  We don't get this right; I'm waiting for the new DB
+	 * logging code to be available.
+	 */
+	for (tp = cbp->textq.cqh_last;
+	    tp != (void *)&cbp->textq; tp = tp->q.cqe_prev)
+		if ((F_ISSET(cbp, CB_LMODE) ||
+		    tp->q.cqe_next != (void *)&cbp->textq) &&
+		    v_event_push(sp, NULL, "\n", 1, 0) ||
+		    v_event_push(sp, NULL, tp->lb, tp->len, 0))
+			return (1);
+
+	/*
+	 * !!!
+	 * If any count was supplied, it applies to the first command in the
+	 * at buffer.
+	 */
+	if (F_ISSET(vp, VC_C1SET)) {
+		len = snprintf(nbuf, sizeof(nbuf), "%lu", vp->count);
+		if (v_event_push(sp, NULL, nbuf, len, 0))
+			return (1);
+	}
+	return (0);
+}