1 files changed, 210 insertions, 0 deletions

diff --git a/scripts/kconfig/libcurses/touch.c b/scripts/kconfig/libcurses/touch.c
new file mode 100644
index 000000000..7ea0b64b2
--- /dev/null
+++ b/scripts/kconfig/libcurses/touch.c
@@ -0,0 +1,210 @@
+/* PDCurses */
+
+#include "curspriv.h"
+
+/*man-start**************************************************************
+
+touch
+-----
+
+### Synopsis
+
+    int touchwin(WINDOW *win);
+    int touchline(WINDOW *win, int start, int count);
+    int untouchwin(WINDOW *win);
+    int wtouchln(WINDOW *win, int y, int n, int changed);
+    bool is_linetouched(WINDOW *win, int line);
+    bool is_wintouched(WINDOW *win);
+
+    int touchoverlap(const WINDOW *win1, WINDOW *win2);
+
+### Description
+
+   touchwin() and touchline() throw away all information about which
+   parts of the window have been touched, pretending that the entire
+   window has been drawn on. This is sometimes necessary when using
+   overlapping windows, since a change to one window will affect the
+   other window, but the records of which lines have been changed in the
+   other window will not reflect the change.
+
+   untouchwin() marks all lines in the window as unchanged since the
+   last call to wrefresh().
+
+   wtouchln() makes n lines in the window, starting at line y, look as
+   if they have (changed == 1) or have not (changed == 0) been changed
+   since the last call to wrefresh().
+
+   is_linetouched() returns TRUE if the specified line in the specified
+   window has been changed since the last call to wrefresh().
+
+   is_wintouched() returns TRUE if the specified window has been changed
+   since the last call to wrefresh().
+
+   touchoverlap(win1, win2) marks the portion of win2 which overlaps
+   with win1 as modified.
+
+### Return Value
+
+   All functions return OK on success and ERR on error except
+   is_wintouched() and is_linetouched().
+
+### Portability
+
+   Function              | X/Open | ncurses | NetBSD
+   :---------------------|:------:|:-------:|:------:
+   touchwin              |    Y   |    Y    |   Y
+   touchline             |    Y   |    Y    |   Y
+   untouchwin            |    Y   |    Y    |   Y
+   wtouchln              |    Y   |    Y    |   Y
+   is_linetouched        |    Y   |    Y    |   Y
+   is_wintouched         |    Y   |    Y    |   Y
+   touchoverlap          |    -   |    -    |   Y
+
+**man-end****************************************************************/
+
+int touchwin(WINDOW *win)
+{
+    int i;
+
+    PDC_LOG(("touchwin() - called: Win=%x\n", win));
+
+    if (!win)
+        return ERR;
+
+    for (i = 0; i < win->_maxy; i++)
+    {
+        win->_firstch[i] = 0;
+        win->_lastch[i] = win->_maxx - 1;
+    }
+
+    return OK;
+}
+
+int touchline(WINDOW *win, int start, int count)
+{
+    int i;
+
+    PDC_LOG(("touchline() - called: win=%p start %d count %d\n",
+             win, start, count));
+
+    if (!win || start > win->_maxy || start + count > win->_maxy)
+        return ERR;
+
+    for (i = start; i < start + count; i++)
+    {
+        win->_firstch[i] = 0;
+        win->_lastch[i] = win->_maxx - 1;
+    }
+
+    return OK;
+}
+
+int untouchwin(WINDOW *win)
+{
+    int i;
+
+    PDC_LOG(("untouchwin() - called: win=%p", win));
+
+    if (!win)
+        return ERR;
+
+    for (i = 0; i < win->_maxy; i++)
+    {
+        win->_firstch[i] = _NO_CHANGE;
+        win->_lastch[i] = _NO_CHANGE;
+    }
+
+    return OK;
+}
+
+int wtouchln(WINDOW *win, int y, int n, int changed)
+{
+    int i;
+
+    PDC_LOG(("wtouchln() - called: win=%p y=%d n=%d changed=%d\n",
+             win, y, n, changed));
+
+    if (!win || y > win->_maxy || y + n > win->_maxy)
+        return ERR;
+
+    for (i = y; i < y + n; i++)
+    {
+        if (changed)
+        {
+            win->_firstch[i] = 0;
+            win->_lastch[i] = win->_maxx - 1;
+        }
+        else
+        {
+            win->_firstch[i] = _NO_CHANGE;
+            win->_lastch[i] = _NO_CHANGE;
+        }
+    }
+
+    return OK;
+}
+
+bool is_linetouched(WINDOW *win, int line)
+{
+    PDC_LOG(("is_linetouched() - called: win=%p line=%d\n", win, line));
+
+    if (!win || line > win->_maxy || line < 0)
+        return FALSE;
+
+    return (win->_firstch[line] != _NO_CHANGE) ? TRUE : FALSE;
+}
+
+bool is_wintouched(WINDOW *win)
+{
+    int i;
+
+    PDC_LOG(("is_wintouched() - called: win=%p\n", win));
+
+    if (win)
+        for (i = 0; i < win->_maxy; i++)
+            if (win->_firstch[i] != _NO_CHANGE)
+                return TRUE;
+
+    return FALSE;
+}
+
+int touchoverlap(const WINDOW *win1, WINDOW *win2)
+{
+    int y, endy, endx, starty, startx, begy1, begx1, begy2, begx2;
+
+    PDC_LOG(("touchoverlap() - called: win1=%p win2=%p\n", win1, win2));
+
+    if (!win1 || !win2)
+        return ERR;
+
+    begy1 = win1->_begy;
+    begx1 = win1->_begx;
+    begy2 = win2->_begy;
+    begx2 = win2->_begy;
+
+    starty = max(begy1, begy2);
+    startx = max(begx1, begx2);
+    endy = min(win1->_maxy + begy1, win2->_maxy + begy2);
+    endx = min(win1->_maxx + begx1, win2->_maxx + begx2);
+
+    if (starty >= endy || startx >= endx)
+        return OK;
+
+    starty -= begy2;
+    startx -= begx2;
+    endy -= begy2;
+    endx -= begx2;
+    endx -= 1;
+
+    for (y = starty; y < endy; y++)
+    {
+        int first = win2->_firstch[y];
+
+        if (first == _NO_CHANGE || win2->_lastch[y] < endx)
+            win2->_lastch[y] = endx;
+        if (first == _NO_CHANGE || first > startx)
+            win2->_firstch[y] = startx;
+    }
+
+    return OK;
+}