Long overdue change to the way we store cells in the grid: now, instead

of storing a full grid_cell with UTF-8 data and everything, store a new
type grid_cell_entry. This can either be the cell itself (for ASCII
cells), or an offset into an extended array (per line) for UTF-8
data.

This avoid a large (8 byte) overhead on non-UTF-8 cells (by far the
majority for most users) without the complexity of the shadow array we
had before. Grid memory without any UTF-8 is about half.

The disadvantage that cells can no longer be modified in place and need
to be copied out of the grid and back but it turned out to be lot less
complicated than I expected.

1 files changed, 0 insertions, 55 deletions

diff --git a/grid-cell.c b/grid-cell.c
deleted file mode 100644
index 09643a9c..00000000
--- a/grid-cell.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* $OpenBSD$ */
-
-/*
- * Copyright (c) 2012 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"
-
-/* Get cell width. */
-u_int
-grid_cell_width(const struct grid_cell *gc)
-{
-	return (gc->xstate >> 4);
-}
-
-/* Get cell data. */
-void
-grid_cell_get(const struct grid_cell *gc, struct utf8_data *ud)
-{
-	ud->size = gc->xstate & 0xf;
-	ud->width = gc->xstate >> 4;
-	memcpy(ud->data, gc->xdata, ud->size);
-}
-
-/* Set cell data. */
-void
-grid_cell_set(struct grid_cell *gc, const struct utf8_data *ud)
-{
-	memcpy(gc->xdata, ud->data, ud->size);
-	gc->xstate = (ud->width << 4) | ud->size;
-}
-
-/* Set a single character as cell data. */
-void
-grid_cell_one(struct grid_cell *gc, u_char ch)
-{
-	*gc->xdata = ch;
-	gc->xstate = (1 << 4) | 1;
-}