/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
-
-
/*
** lib_newwin.c
**
#include <curses.priv.h>
-MODULE_ID("$Id: lib_newwin.c,v 1.21 1999/10/03 00:42:03 tom Exp $")
+MODULE_ID("$Id: lib_newwin.c,v 1.24 2000/04/29 18:49:51 tom Exp $")
-void _nc_freewin(WINDOW *win)
+void
+_nc_freewin(WINDOW *win)
{
-WINDOWLIST *p, *q;
-int i;
-
- if (win != 0) {
- for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
- if (p->win == win) {
- if (q == 0)
- _nc_windows = p->next;
- else
- q->next = p->next;
- free(p);
-
- if (! (win->_flags & _SUBWIN)) {
- for (i = 0; i <= win->_maxy && win->_line[i].text; i++)
- FreeIfNeeded(win->_line[i].text);
- }
- free(win->_line);
- free(win);
-
- if (win == curscr) curscr = 0;
- if (win == stdscr) stdscr = 0;
- if (win == newscr) newscr = 0;
-
- T(("...deleted win=%p", win));
- break;
- }
+ WINDOWLIST *p, *q;
+ int i;
+
+ if (win != 0) {
+ for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
+ if (p->win == win) {
+ if (q == 0)
+ _nc_windows = p->next;
+ else
+ q->next = p->next;
+ free(p);
+
+ if (!(win->_flags & _SUBWIN)) {
+ for (i = 0; i <= win->_maxy; i++)
+ FreeIfNeeded(win->_line[i].text);
}
+ free(win->_line);
+ free(win);
+
+ if (win == curscr)
+ curscr = 0;
+ if (win == stdscr)
+ stdscr = 0;
+ if (win == newscr)
+ newscr = 0;
+
+ T(("...deleted win=%p", win));
+ break;
+ }
}
+ }
}
-WINDOW * newwin(int num_lines, int num_columns, int begy, int begx)
+WINDOW *
+newwin(int num_lines, int num_columns, int begy, int begx)
{
-WINDOW *win;
-chtype *ptr;
-int i;
+ WINDOW *win;
+ chtype *ptr;
+ int i;
- T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
+ T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
- if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
- returnWin(0);
+ if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
+ returnWin(0);
- if (num_lines == 0)
- num_lines = SP->_lines_avail - begy;
- if (num_columns == 0)
- num_columns = screen_columns - begx;
+ if (num_lines == 0)
+ num_lines = SP->_lines_avail - begy;
+ if (num_columns == 0)
+ num_columns = screen_columns - begx;
- if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
- returnWin(0);
+ if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
+ returnWin(0);
- if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
- returnWin(0);
+ if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
+ returnWin(0);
- for (i = 0; i < num_lines; i++) {
- if ((win->_line[i].text = typeCalloc(chtype, (unsigned)num_columns)) == 0) {
- _nc_freewin(win);
- returnWin(0);
- }
- for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; )
- *ptr++ = ' ';
+ for (i = 0; i < num_lines; i++) {
+ win->_line[i].text = typeCalloc(chtype, (unsigned) num_columns);
+ if (win->_line[i].text == 0) {
+ _nc_freewin(win);
+ returnWin(0);
}
+ for (ptr = win->_line[i].text; ptr < win->_line[i].text +
+ num_columns;)
+ *ptr++ = ' ';
+ }
- T(("newwin: returned window is %p", win));
+ T(("newwin: returned window is %p", win));
- returnWin(win);
+ returnWin(win);
}
-WINDOW * derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
+WINDOW *
+derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
{
-WINDOW *win;
-int i;
-int flags = _SUBWIN;
+ WINDOW *win;
+ int i;
+ int flags = _SUBWIN;
- T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns, begy, begx));
+ T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns,
+ begy, begx));
- /*
- ** make sure window fits inside the original one
- */
- if ( begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
- returnWin(0);
- if ( begy + num_lines > orig->_maxy + 1
- || begx + num_columns > orig->_maxx + 1)
- returnWin(0);
+ /*
+ ** make sure window fits inside the original one
+ */
+ if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
+ returnWin(0);
+ if (begy + num_lines > orig->_maxy + 1
+ || begx + num_columns > orig->_maxx + 1)
+ returnWin(0);
- if (num_lines == 0)
- num_lines = orig->_maxy + 1 - begy;
+ if (num_lines == 0)
+ num_lines = orig->_maxy + 1 - begy;
- if (num_columns == 0)
- num_columns = orig->_maxx + 1 - begx;
+ if (num_columns == 0)
+ num_columns = orig->_maxx + 1 - begx;
- if (orig->_flags & _ISPAD)
- flags |= _ISPAD;
+ if (orig->_flags & _ISPAD)
+ flags |= _ISPAD;
- if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx, flags)) == 0)
- returnWin(0);
+ if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy,
+ orig->_begx + begx, flags)) == 0)
+ returnWin(0);
- win->_pary = begy;
- win->_parx = begx;
- win->_attrs = orig->_attrs;
- win->_bkgd = orig->_bkgd;
+ win->_pary = begy;
+ win->_parx = begx;
+ win->_attrs = orig->_attrs;
+ win->_bkgd = orig->_bkgd;
- for (i = 0; i < num_lines; i++)
- win->_line[i].text = &orig->_line[begy++].text[begx];
+ for (i = 0; i < num_lines; i++)
+ win->_line[i].text = &orig->_line[begy++].text[begx];
- win->_parent = orig;
+ win->_parent = orig;
- T(("derwin: returned window is %p", win));
+ T(("derwin: returned window is %p", win));
- returnWin(win);
+ returnWin(win);
}
-
-WINDOW *subwin(WINDOW *w, int l, int c, int y, int x)
+WINDOW *
+subwin(WINDOW *w, int l, int c, int y, int x)
{
- T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
- T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
+ T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
+ T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
+
+ returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
+}
- returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
+static bool
+dimension_limit(int value)
+{
+ NCURSES_SIZE_T test = value;
+ return (test == value && value > 0);
}
WINDOW *
_nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
{
-int i;
-WINDOWLIST *wp;
-WINDOW *win;
-bool is_pad = (flags & _ISPAD);
-
- T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
-
- if (num_lines <= 0 || num_columns <= 0)
- return 0;
-
- if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
- return 0;
-
- if ((win = typeCalloc(WINDOW, 1)) == 0)
- return 0;
-
- if ((win->_line = typeCalloc(struct ldat, ((unsigned)num_lines))) == 0) {
- free(win);
- return 0;
- }
-
- win->_curx = 0;
- win->_cury = 0;
- win->_maxy = num_lines - 1;
- win->_maxx = num_columns - 1;
- win->_begy = begy;
- win->_begx = begx;
- win->_yoffset = SP->_topstolen;
-
- win->_flags = flags;
- win->_attrs = A_NORMAL;
- win->_bkgd = BLANK;
-
- win->_clear = is_pad ? FALSE : (num_lines == screen_lines && num_columns == screen_columns);
- win->_idlok = FALSE;
- win->_idcok = TRUE;
- win->_scroll = FALSE;
- win->_leaveok = FALSE;
- win->_use_keypad = FALSE;
- win->_delay = -1;
- win->_immed = FALSE;
- win->_sync = 0;
- win->_parx = -1;
- win->_pary = -1;
- win->_parent = 0;
-
- win->_regtop = 0;
- win->_regbottom = num_lines - 1;
-
- win->_pad._pad_y = -1;
- win->_pad._pad_x = -1;
- win->_pad._pad_top = -1;
- win->_pad._pad_bottom = -1;
- win->_pad._pad_left = -1;
- win->_pad._pad_right = -1;
-
- for (i = 0; i < num_lines; i++)
- {
- /*
- * This used to do
- *
- * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
- *
- * which marks the whole window unchanged. That's how
- * SVr1 curses did it, but SVr4 curses marks the whole new
- * window changed.
- *
- * With the old SVr1-like code, say you have stdscr full of
- * characters, then create a new window with newwin(),
- * then do a printw(win, "foo ");, the trailing spaces are
- * completely ignored by the following refreshes. So, you
- * get "foojunkjunk" on the screen instead of "foo " as
- * you actually intended.
- *
- * SVr4 doesn't do this. Instead the spaces are actually written.
- * So that's how we want ncurses to behave.
- */
- win->_line[i].firstchar = 0;
- win->_line[i].lastchar = num_columns-1;
-
- if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
- }
-
- if (!is_pad && (begx + num_columns == screen_columns)) {
- win->_flags |= _ENDLINE;
-
- if (begx == 0 && num_lines == screen_lines && begy == 0)
- win->_flags |= _FULLWIN;
-
- if (begy + num_lines == screen_lines)
- win->_flags |= _SCROLLWIN;
- }
-
- wp->next = _nc_windows;
- wp->win = win;
- _nc_windows = wp;
-
- T((T_CREATE("window %p"), win));
-
- return(win);
+ int i;
+ WINDOWLIST *wp;
+ WINDOW *win;
+ bool is_pad = (flags & _ISPAD);
+
+ T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
+
+ if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
+ return 0;
+
+ if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
+ return 0;
+
+ if ((win = typeCalloc(WINDOW, 1)) == 0)
+ return 0;
+
+ if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
+ free(win);
+ return 0;
+ }
+
+ win->_curx = 0;
+ win->_cury = 0;
+ win->_maxy = num_lines - 1;
+ win->_maxx = num_columns - 1;
+ win->_begy = begy;
+ win->_begx = begx;
+ win->_yoffset = SP->_topstolen;
+
+ win->_flags = flags;
+ win->_attrs = A_NORMAL;
+ win->_bkgd = BLANK;
+
+ win->_clear = is_pad ? FALSE : (num_lines == screen_lines && num_columns
+ == screen_columns);
+ win->_idlok = FALSE;
+ win->_idcok = TRUE;
+ win->_scroll = FALSE;
+ win->_leaveok = FALSE;
+ win->_use_keypad = FALSE;
+ win->_delay = -1;
+ win->_immed = FALSE;
+ win->_sync = 0;
+ win->_parx = -1;
+ win->_pary = -1;
+ win->_parent = 0;
+
+ win->_regtop = 0;
+ win->_regbottom = num_lines - 1;
+
+ win->_pad._pad_y = -1;
+ win->_pad._pad_x = -1;
+ win->_pad._pad_top = -1;
+ win->_pad._pad_bottom = -1;
+ win->_pad._pad_left = -1;
+ win->_pad._pad_right = -1;
+
+ for (i = 0; i < num_lines; i++) {
+ /*
+ * This used to do
+ *
+ * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
+ *
+ * which marks the whole window unchanged. That's how
+ * SVr1 curses did it, but SVr4 curses marks the whole new
+ * window changed.
+ *
+ * With the old SVr1-like code, say you have stdscr full of
+ * characters, then create a new window with newwin(),
+ * then do a printw(win, "foo ");, the trailing spaces are
+ * completely ignored by the following refreshes. So, you
+ * get "foojunkjunk" on the screen instead of "foo " as
+ * you actually intended.
+ *
+ * SVr4 doesn't do this. Instead the spaces are actually written.
+ * So that's how we want ncurses to behave.
+ */
+ win->_line[i].firstchar = 0;
+ win->_line[i].lastchar = num_columns - 1;
+
+ if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
+ }
+
+ if (!is_pad && (begx + num_columns == screen_columns)) {
+ win->_flags |= _ENDLINE;
+
+ if (begx == 0 && num_lines == screen_lines && begy == 0)
+ win->_flags |= _FULLWIN;
+
+ if (begy + num_lines == screen_lines)
+ win->_flags |= _SCROLLWIN;
+ }
+
+ wp->next = _nc_windows;
+ wp->win = win;
+ _nc_windows = wp;
+
+ T((T_CREATE("window %p"), win));
+
+ return (win);
}
projects / ncurses.git / blobdiff