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Update to be more readable and hopefully lose memory problems.
This commit is contained in:
Nicholas Marriott
parent
98642e907a
commit
73d7b70479
6
CHANGES
6
CHANGES
@ -1,3 +1,7 @@
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27 August 2007
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* Change screen.c to work more logically and hopefully fix heap corruption.
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09 July 2007
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* Initial import to CVS. Basic functions are working, albeit with a couple of
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@ -8,5 +12,5 @@
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(including mutt, emacs). No status bar yet and no key remapping or other
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customisation.
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$Id: CHANGES,v 1.2 2007-07-10 10:21:58 nicm Exp $
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$Id: CHANGES,v 1.3 2007-08-27 09:53:38 nicm Exp $
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97
screen.c
97
screen.c
@ -1,4 +1,4 @@
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/* $Id: screen.c,v 1.4 2007-08-27 08:15:39 nicm Exp $ */
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/* $Id: screen.c,v 1.5 2007-08-27 09:53:38 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -25,7 +25,7 @@
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/*
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* Virtual screen and basic ANSI terminal emulator.
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*
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* XXX Most of this file sucks. There be memory corruption somewhere here.
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* XXX Much of this file sucks.
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*/
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size_t screen_store_attributes(struct buffer *, u_char);
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@ -88,7 +88,7 @@ screen_create(struct screen *s, u_int sx, u_int sy)
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s->grid_data = xmalloc(sy * (sizeof *s->grid_data));
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s->grid_attr = xmalloc(sy * (sizeof *s->grid_attr));
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s->grid_colr = xmalloc(sy * (sizeof *s->grid_colr));
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screen_make_lines(s, 0, screen_last_y(s));
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screen_make_lines(s, 0, sy);
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screen_fill_screen(s, SCREEN_DEFDATA, 0, SCREEN_DEFCOLR);
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}
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@ -304,16 +304,16 @@ screen_store_colours(struct buffer *b, u_char colr)
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/* Make a range of lines. */
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void
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screen_make_lines(struct screen *s, u_int uy, u_int ly)
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screen_make_lines(struct screen *s, u_int py, u_int ny)
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{
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u_int i;
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log_debug("making lines %u:%u", uy, ly);
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log_debug("making lines %u,%u", py, ny);
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if (uy > screen_last_y(s) || ly > screen_last_y(s) || ly < uy)
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if (py > screen_last_y(s) || py + ny - 1 > screen_last_y(s))
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fatalx("bad range");
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for (i = uy; i <= ly; i++) {
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for (i = py; i < py + ny; i++) {
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s->grid_data[i] = xmalloc(s->sx);
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s->grid_attr[i] = xmalloc(s->sx);
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s->grid_colr[i] = xmalloc(s->sx);
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@ -322,65 +322,56 @@ screen_make_lines(struct screen *s, u_int uy, u_int ly)
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/* Free a range of lines. */
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void
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screen_free_lines(struct screen *s, u_int uy, u_int ly)
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screen_free_lines(struct screen *s, u_int py, u_int ny)
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{
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u_int i;
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log_debug("freeing lines %u:%u", uy, ly);
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log_debug("freeing lines %u,%u", py, ny);
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if (uy > screen_last_y(s) || ly > screen_last_y(s) || ly < uy)
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if (py > screen_last_y(s) || py + ny - 1 > screen_last_y(s))
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fatalx("bad range");
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for (i = uy; i <= ly; i++) {
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for (i = py; i < py + ny; i++) {
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xfree(s->grid_data[i]);
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s->grid_data[i] = (u_char *) 0xffffffff;
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xfree(s->grid_attr[i]);
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s->grid_attr[i] = (u_char *) 0xffffffff;
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xfree(s->grid_colr[i]);
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s->grid_colr[i] = (u_char *) 0xffffffff;
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}
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}
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/* Move a range of lines. */
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void
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screen_move_lines(struct screen *s, u_int dy, u_int uy, u_int ly)
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screen_move_lines(struct screen *s, u_int dy, u_int py, u_int ny)
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{
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u_int ny;
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log_debug("moving lines %u,%u to %u", py, ny, dy);
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log_debug("moving lines %u:%u to %u", uy, ly, dy);
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ny = (ly - uy) + 1;
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if (uy > screen_last_y(s) || ly > screen_last_y(s) || ly < uy)
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if (py > screen_last_y(s) || py + ny - 1 > screen_last_y(s))
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fatalx("bad range");
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if (dy > screen_last_y(s))
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if (dy > screen_last_y(s) || dy == py)
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fatalx("bad destination");
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if (dy + ny - 1 > screen_last_y(s))
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fatalx("bad size");
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if (dy == uy)
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fatalx("null move");
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memmove(
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&s->grid_data[dy], &s->grid_data[uy], ny * (sizeof *s->grid_data));
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&s->grid_data[dy], &s->grid_data[py], ny * (sizeof *s->grid_data));
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memmove(
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&s->grid_attr[dy], &s->grid_attr[uy], ny * (sizeof *s->grid_attr));
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&s->grid_attr[dy], &s->grid_attr[py], ny * (sizeof *s->grid_attr));
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memmove(
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&s->grid_colr[dy], &s->grid_colr[uy], ny * (sizeof *s->grid_colr));
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&s->grid_colr[dy], &s->grid_colr[py], ny * (sizeof *s->grid_colr));
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}
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/* Fill a range of lines. */
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void
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screen_fill_lines(
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struct screen *s, u_int uy, u_int ly, u_char data, u_char attr, u_char colr)
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struct screen *s, u_int py, u_int ny, u_char data, u_char attr, u_char colr)
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{
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u_int i;
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log_debug("filling lines %u:%u", uy, ly);
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log_debug("filling lines %u,%u", py, ny);
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if (uy > screen_last_y(s) || ly > screen_last_y(s) || ly < uy)
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if (py > screen_last_y(s) || py + ny - 1 > screen_last_y(s))
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fatalx("bad range");
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for (i = uy; i <= ly; i++)
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for (i = py; i < py + ny; i++)
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screen_fill_line(s, i, data, attr, colr);
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}
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@ -763,13 +754,28 @@ screen_insert_lines(struct screen *s, u_int py, u_int ny)
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ny = screen_last_y(s) - py;
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log_debug("inserting lines: %u,%u", py, ny);
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screen_free_lines(s, (screen_last_y(s) - ny) + 1, screen_last_y(s));
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/*
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* Insert range of ny lines at py:
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* - Free ny lines from end of screen.
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* - Move from py to end of screen - ny to py + ny.
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* - Create ny lines at py.
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*
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* Example: insert 2 lines at 4.
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* sy = 10, py = 4, ny = 2
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* screen_free_lines(s, 8, 2); - delete lines 8,9
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* screen_move_lines(s, 6, 4, 4); - move 4,5,6,7 to 6,7,8,9
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* screen_make_lines(s, 4, 2); - make lines 4,5
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*/
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screen_free_lines(s, s->sy - ny, ny);
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if (py != screen_last_y(s))
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screen_move_lines(s, py + ny, py, screen_last_y(s) - ny);
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screen_move_lines(s, py + ny, py, s->sy - py - ny);
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screen_make_lines(s, py, ny);
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screen_fill_lines(
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s, py, py + ny - 1, SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
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s, py, ny, SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
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}
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/* Delete lines. */
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@ -783,14 +789,27 @@ screen_delete_lines(struct screen *s, u_int py, u_int ny)
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ny = screen_last_y(s) - py;
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log_debug("deleting lines: %u,%u", py, ny);
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screen_free_lines(s, py, py + ny - 1);
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/*
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* Delete range of ny lines at py:
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* - Free ny lines at py.
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* - Move from py + ny to end of screen to py.
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* - Free and recreate last ny lines.
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*
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* Example: delete lines 3,4.
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* sy = 10, py = 3, ny = 2
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* screen_free_lines(s, 3, 2); - delete lines 3,4
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* screen_move_lines(s, 3, 5, 5); - move 5,6,7,8,9 to 3
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* screen_make_lines(s, 8, 2); - make lines 8,9
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*/
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screen_free_lines(s, py, ny);
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if (py != screen_last_y(s))
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screen_move_lines(s, py, py + ny, screen_last_y(s));
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screen_move_lines(s, py, py + ny, s->sy - py - ny);
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screen_make_lines(s, (screen_last_y(s) - ny) + 1, screen_last_y(s));
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screen_fill_lines(s, (screen_last_y(s) - ny) + 1,
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screen_last_y(s), SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
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screen_make_lines(s, s->sy - ny, ny);
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screen_fill_lines(
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s, s->sy - ny, ny, SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
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}
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/* Insert characters. */
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@ -1,4 +1,4 @@
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/* $Id: session.c,v 1.2 2007-07-25 23:13:18 nicm Exp $ */
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/* $Id: session.c,v 1.3 2007-08-27 09:53:38 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -19,6 +19,7 @@
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#include <sys/types.h>
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#include <string.h>
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#include <stdlib.h>
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#include "tmux.h"
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