Merge branch 'upstream-PDCurses' into update-pdcurses

# By PDCurses Upstream
* upstream-PDCurses:
  PDCurses 2021-12-08 (f1cd4f45)

1 files changed, 74 insertions, 0 deletions

diff --git a/Utilities/cmpdcurses/pdcurses/beep.c b/Utilities/cmpdcurses/pdcurses/beep.c
new file mode 100644
index 0000000..690c794
--- /dev/null
+++ b/Utilities/cmpdcurses/pdcurses/beep.c
@@ -0,0 +1,74 @@
+/* PDCurses */
+
+#include <curspriv.h>
+
+/*man-start**************************************************************
+
+beep
+----
+
+### Synopsis
+
+    int beep(void);
+    int flash(void);
+
+### Description
+
+   beep() sounds the audible bell on the terminal, if possible; if not,
+   it calls flash().
+
+   flash() "flashes" the screen, by inverting the foreground and
+   background of every cell, pausing, and then restoring the original
+   attributes.
+
+### Return Value
+
+   These functions return ERR if called before initscr(), otherwise OK.
+
+### Portability
+                             X/Open  ncurses  NetBSD
+    beep                        Y       Y       Y
+    flash                       Y       Y       Y
+
+**man-end****************************************************************/
+
+int beep(void)
+{
+    PDC_LOG(("beep() - called\n"));
+
+    if (!SP)
+        return ERR;
+
+    if (SP->audible)
+        PDC_beep();
+    else
+        flash();
+
+    return OK;
+}
+
+int flash(void)
+{
+    int z, y, x;
+
+    PDC_LOG(("flash() - called\n"));
+
+    if (!curscr)
+        return ERR;
+
+    /* Reverse each cell; wait; restore the screen */
+
+    for (z = 0; z < 2; z++)
+    {
+        for (y = 0; y < LINES; y++)
+            for (x = 0; x < COLS; x++)
+                curscr->_y[y][x] ^= A_REVERSE;
+
+        wrefresh(curscr);
+
+        if (!z)
+            napms(50);
+    }
+
+    return OK;
+}