Initial import to CVS. Basic functions are working, albeit with a couple of showstopper memory bugs and many missing features. Detaching, reattaching, creating new sessions, listing sessions work acceptably for using with shells. Simple curses programs (top, systat, tetris) and more complicated ones (mutt, emacs) that don't require scrolling regions (ESC[r) mostly work fine (including mutt, emacs). No status bar yet and no key remapping or other customisation.

buffer.c

@@ -0,0 +1,181 @@
+/* $Id: buffer.c,v 1.1.1.1 2007-07-09 19:03:33 nicm Exp $ */
+
+/*
+ * 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 <string.h>
+
+#include "tmux.h"
+
+/* Create a buffer. */
+struct buffer *
+buffer_create(size_t size)
+{
+	struct buffer	*b;
+
+	if (size == 0)
+		log_fatalx("buffer_create: zero size");
+
+	b = xcalloc(1, sizeof *b);
+
+	b->base = xmalloc(size);
+	b->space = size;
+
+	return (b);
+}
+
+/* Destroy a buffer. */
+void
+buffer_destroy(struct buffer *b)
+{
+	xfree(b->base);
+	xfree(b);
+}
+
+/* Empty a buffer. */
+void
+buffer_clear(struct buffer *b)
+{
+	b->size = 0;
+	b->off = 0;
+}
+
+/* Ensure free space for size in buffer. */
+void
+buffer_ensure(struct buffer *b, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_ensure: zero size");
+
+	if (BUFFER_FREE(b) >= size)
+		return;
+
+	if (b->off > 0) {
+		if (b->size > 0)
+			memmove(b->base, b->base + b->off, b->size);
+		b->off = 0;
+	}
+
+	ENSURE_FOR(b->base, b->space, b->size, size);
+}
+
+/* Adjust buffer after data appended. */
+void
+buffer_add(struct buffer *b, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_add: zero size");
+	if (size > b->space - b->size)
+		log_fatalx("buffer_add: overflow");
+
+	b->size += size;
+}
+
+/* Reverse buffer add. */
+void
+buffer_reverse_add(struct buffer *b, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_reverse_add: zero size");
+	if (size > b->size)
+		log_fatalx("buffer_reverse_add: underflow");
+
+	b->size -= size;
+}
+
+/* Adjust buffer after data removed. */
+void
+buffer_remove(struct buffer *b, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_remove: zero size");
+	if (size > b->size)
+		log_fatalx("buffer_remove: underflow");
+
+	b->size -= size;
+	b->off += size;
+}
+
+/* Reverse buffer remove. */
+void
+buffer_reverse_remove(struct buffer *b, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_reverse_remove: zero size");
+	if (size > b->off)
+		log_fatalx("buffer_reverse_remove: overflow");
+
+	b->size += size;
+	b->off -= size;
+}
+
+/* Insert a section into the buffer. */
+void
+buffer_insert_range(struct buffer *b, size_t base, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_insert_range: zero size");
+	if (base > b->size)
+		log_fatalx("buffer_insert_range: range overflows buffer");
+
+	buffer_ensure(b, size);
+	memmove(b->base + b->off + base + size,
+	    b->base + b->off + base, b->size - base);
+	b->size += size;
+}
+
+/* Delete a section from the buffer. */
+void
+buffer_delete_range(struct buffer *b, size_t base, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_delete_range: zero size");
+	if (size > b->size)
+		log_fatalx("buffer_delete_range: size too big");
+	if (base + size > b->size)
+		log_fatalx("buffer_delete_range: range overflows buffer");
+
+	memmove(b->base + b->off + base,
+	    b->base + b->off + base + size, b->size - base - size);
+	b->size -= size;
+}
+
+/* Copy data into a buffer. */
+void
+buffer_write(struct buffer *b, const void *data, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_write: zero size");
+
+	buffer_ensure(b, size);
+	memcpy(BUFFER_IN(b), data, size);
+	buffer_add(b, size);
+}
+
+/* Copy data out of a buffer. */
+void
+buffer_read(struct buffer *b, void *data, size_t size)
+{
+	if (size == 0)
+		log_fatalx("buffer_read: zero size");
+	if (size > b->size)
+		log_fatalx("buffer_read: underflow");
+
+	memcpy(data, BUFFER_OUT(b), size);
+	buffer_remove(b, size);
+}