Import tmux, a terminal multiplexor allowing (among other things) a single

terminal to be switched between several different windows and programs
displayed on one terminal be detached from one terminal and moved to another.

ok deraadt pirofti

paste.c

@@ -0,0 +1,131 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <string.h>
+
+#include "tmux.h"
+
+void
+paste_init_stack(struct paste_stack *ps)
+{
+	ARRAY_INIT(ps);
+}
+
+void
+paste_free_stack(struct paste_stack *ps)
+{
+	while (paste_free_top(ps) == 0)
+		;
+}
+
+struct paste_buffer *
+paste_walk_stack(struct paste_stack *ps, uint *idx)
+{
+	struct paste_buffer	*pb;
+
+	pb = paste_get_index(ps, *idx);
+	(*idx)++;
+	return (pb);
+}
+
+struct paste_buffer *
+paste_get_top(struct paste_stack *ps)
+{
+	if (ARRAY_LENGTH(ps) == 0)
+		return (NULL);
+	return (ARRAY_FIRST(ps));
+}
+
+struct paste_buffer *
+paste_get_index(struct paste_stack *ps, u_int idx)
+{
+	if (idx >= ARRAY_LENGTH(ps))
+		return (NULL);
+	return (ARRAY_ITEM(ps, idx));
+}
+
+int
+paste_free_top(struct paste_stack *ps)
+{
+	struct paste_buffer	*pb;
+
+	if (ARRAY_LENGTH(ps) == 0)
+		return (-1);
+
+	pb = ARRAY_FIRST(ps);
+	ARRAY_REMOVE(ps, 0);
+
+	xfree(pb->data);
+	xfree(pb);
+
+	return (0);
+}
+
+int
+paste_free_index(struct paste_stack *ps, u_int idx)
+{
+	struct paste_buffer	*pb;
+
+	if (idx >= ARRAY_LENGTH(ps))
+		return (-1);
+
+	pb = ARRAY_ITEM(ps, idx);
+	ARRAY_REMOVE(ps, idx);
+
+	xfree(pb->data);
+	xfree(pb);
+
+	return (0);
+}
+
+void
+paste_add(struct paste_stack *ps, char *data, u_int limit)
+{
+	struct paste_buffer	*pb;
+
+	while (ARRAY_LENGTH(ps) >= limit)
+		ARRAY_TRUNC(ps, 1);
+
+	pb = xmalloc(sizeof *pb);
+	ARRAY_INSERT(ps, 0, pb);
+
+	pb->data = data;
+	if (gettimeofday(&pb->tv, NULL) != 0)
+		fatal("gettimeofday");
+}
+
+int
+paste_replace(struct paste_stack *ps, u_int idx, char *data)
+{
+	struct paste_buffer	*pb;
+
+	if (idx >= ARRAY_LENGTH(ps))
+		return (-1);
+
+	pb = ARRAY_ITEM(ps, idx);
+	xfree(pb->data);
+
+	pb->data = data;
+	if (gettimeofday(&pb->tv, NULL) != 0)
+		fatal("gettimeofday");
+
+	return (0);
+}