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nethack/win/curses/cursmisc.c
PatR 0e8163e341 curses: ncurses vs Ctrl+Click 
Asking curses to report whether the Ctrl key was being pressed during
a mouse click was sending mouse position reports--even those aren't
being requested--and actual Ctrl+Left_click was reporting a pair of
duplicate Ctrl+Mouse_position_report events when a click was actually
performed.  So turn off Ctrl key reporting.

Mac with one-button mouse can be configured to send "secondary click"
for Ctrl+Click.  A laptop trackpad handles that differently (press the
button while two fingers are on the touchpad to send secondary click)
and doesn't support Ctrl+Click as an alternate way to do that.  If this
would work within curses then they could operate the same regardless
of how the user set the mouse or trackpad configuraiton.  But I wasn't
able to make it work right.
2019-07-09 18:55:10 -07:00

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/* vim:set cin ft=c sw=4 sts=4 ts=8 et ai cino=Ls\:0t0(0 : -*- mode:c;fill-column:80;tab-width:8;c-basic-offset:4;indent-tabs-mode:nil;c-file-style:"k&r" -*-*/
/* NetHack 3.6 cursmisc.c */
/* Copyright (c) Karl Garrison, 2010. */
/* NetHack may be freely redistributed. See license for details. */
#include "curses.h"
#include "hack.h"
#include "wincurs.h"
#include "cursmisc.h"
#include "func_tab.h"
#include "dlb.h"
#include <ctype.h>
/* Misc. curses interface functions */
/* Private declarations */
static int curs_x = -1;
static int curs_y = -1;
static int parse_escape_sequence(void);
/* Macros for Control and Alt keys */
#ifndef M
# ifndef NHSTDC
# define M(c) (0x80 | (c))
# else
# define M(c) ((c) - 128)
# endif/* NHSTDC */
#endif
#ifndef C
# define C(c) (0x1f & (c))
#endif
/* Read a character of input from the user */
int
curses_read_char()
{
int ch, tmpch;
/* cancel message suppression; all messages have had a chance to be read */
curses_got_input();
ch = getch();
tmpch = ch;
ch = curses_convert_keys(ch);
if (ch == 0) {
ch = '\033'; /* map NUL to ESC since nethack doesn't expect NUL */
}
#if defined(ALT_0) && defined(ALT_9) /* PDCurses, maybe others */
if ((ch >= ALT_0) && (ch <= ALT_9)) {
tmpch = (ch - ALT_0) + '0';
ch = M(tmpch);
}
#endif
#if defined(ALT_A) && defined(ALT_Z) /* PDCurses, maybe others */
if ((ch >= ALT_A) && (ch <= ALT_Z)) {
tmpch = (ch - ALT_A) + 'a';
ch = M(tmpch);
}
#endif
#ifdef KEY_RESIZE
/* Handle resize events via get_nh_event, not this code */
if (ch == KEY_RESIZE) {
ch = '\033'; /* NetHack doesn't know what to do with KEY_RESIZE */
}
#endif
if (counting && !isdigit(ch)) { /* Dismiss count window if necissary */
curses_count_window(NULL);
curses_refresh_nethack_windows();
}
return ch;
}
/* Turn on or off the specified color and / or attribute */
void
curses_toggle_color_attr(WINDOW *win, int color, int attr, int onoff)
{
#ifdef TEXTCOLOR
int curses_color;
/* if color is disabled, just show attribute */
if ((win == mapwin) ? !iflags.wc_color
/* statuswin is for #if STATUS_HILITES
but doesn't need to be conditional */
: !(iflags.wc2_guicolor || win == statuswin)) {
#endif
if (attr != NONE) {
if (onoff == ON)
wattron(win, attr);
else
wattroff(win, attr);
}
return;
#ifdef TEXTCOLOR
}
if (color == 0) { /* make black fg visible */
# ifdef USE_DARKGRAY
if (iflags.wc2_darkgray) {
if (can_change_color() && (COLORS > 16)) {
/* colorpair for black is already darkgray */
} else { /* Use bold for a bright black */
wattron(win, A_BOLD);
}
} else
# endif/* USE_DARKGRAY */
color = CLR_BLUE;
}
curses_color = color + 1;
if (COLORS < 16) {
if (curses_color > 8 && curses_color < 17)
curses_color -= 8;
else if (curses_color > (17 + 16))
curses_color -= 16;
}
if (onoff == ON) { /* Turn on color/attributes */
if (color != NONE) {
if ((((color > 7) && (color < 17)) ||
(color > 17 + 17)) && (COLORS < 16)) {
wattron(win, A_BOLD);
}
wattron(win, COLOR_PAIR(curses_color));
}
if (attr != NONE) {
wattron(win, attr);
}
} else { /* Turn off color/attributes */
if (color != NONE) {
if ((color > 7) && (COLORS < 16)) {
wattroff(win, A_BOLD);
}
# ifdef USE_DARKGRAY
if ((color == 0) && (!can_change_color() || (COLORS <= 16))) {
wattroff(win, A_BOLD);
}
# else
if (iflags.use_inverse) {
wattroff(win, A_REVERSE);
}
# endif/* DARKGRAY */
wattroff(win, COLOR_PAIR(curses_color));
}
if (attr != NONE) {
wattroff(win, attr);
}
}
#else
nhUse(color);
#endif /* TEXTCOLOR */
}
/* clean up and quit - taken from tty port */
void
curses_bail(const char *mesg)
{
clearlocks();
curses_exit_nhwindows(mesg);
nh_terminate(EXIT_SUCCESS);
}
/* Return a winid for a new window of the given type */
winid
curses_get_wid(int type)
{
static winid menu_wid = 20; /* Always even */
static winid text_wid = 21; /* Always odd */
winid ret;
switch (type) {
case NHW_MESSAGE:
return MESSAGE_WIN;
case NHW_MAP:
return MAP_WIN;
case NHW_STATUS:
return STATUS_WIN;
case NHW_MENU:
ret = menu_wid;
break;
case NHW_TEXT:
ret = text_wid;
break;
default:
impossible("curses_get_wid: unsupported window type");
ret = -1;
}
while (curses_window_exists(ret)) {
ret += 2;
if ((ret + 2) > 10000) { /* Avoid "wid2k" problem */
ret -= 9900;
}
}
if (type == NHW_MENU) {
menu_wid += 2;
} else {
text_wid += 2;
}
return ret;
}
/*
* Allocate a copy of the given string. If null, return a string of
* zero length.
*
* This is taken from copy_of() in tty/wintty.c.
*/
char *
curses_copy_of(const char *s)
{
if (!s)
s = "";
return dupstr(s);
}
/* Determine the number of lines needed for a string for a dialog window
of the given width */
int
curses_num_lines(const char *str, int width)
{
int last_space, count;
int curline = 1;
char substr[BUFSZ];
char tmpstr[BUFSZ];
strncpy(substr, str, BUFSZ-1);
substr[BUFSZ-1] = '\0';
while (strlen(substr) > (size_t) width) {
last_space = 0;
for (count = 0; count <= width; count++) {
if (substr[count] == ' ')
last_space = count;
}
if (last_space == 0) { /* No spaces found */
last_space = count - 1;
}
for (count = (last_space + 1); count < (int) strlen(substr); count++) {
tmpstr[count - (last_space + 1)] = substr[count];
}
tmpstr[count - (last_space + 1)] = '\0';
strcpy(substr, tmpstr);
curline++;
}
return curline;
}
/* Break string into smaller lines to fit into a dialog window of the
given width */
char *
curses_break_str(const char *str, int width, int line_num)
{
int last_space, count;
char *retstr;
int curline = 0;
int strsize = (int) strlen(str) + 1;
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
char substr[strsize];
char curstr[strsize];
char tmpstr[strsize];
strcpy(substr, str);
#else
#ifndef BUFSZ
#define BUFSZ 256
#endif
char substr[BUFSZ * 2];
char curstr[BUFSZ * 2];
char tmpstr[BUFSZ * 2];
if (strsize > (BUFSZ * 2) - 1) {
paniclog("curses", "curses_break_str() string too long.");
strncpy(substr, str, (BUFSZ * 2) - 2);
substr[(BUFSZ * 2) - 1] = '\0';
} else
strcpy(substr, str);
#endif
while (curline < line_num) {
if (strlen(substr) == 0) {
break;
}
curline++;
last_space = 0;
for (count = 0; count <= width; count++) {
if (substr[count] == ' ') {
last_space = count;
} else if (substr[count] == '\0') {
last_space = count;
break;
}
}
if (last_space == 0) { /* No spaces found */
last_space = count - 1;
}
for (count = 0; count < last_space; count++) {
curstr[count] = substr[count];
}
curstr[count] = '\0';
if (substr[count] == '\0') {
break;
}
for (count = (last_space + 1); count < (int) strlen(substr); count++) {
tmpstr[count - (last_space + 1)] = substr[count];
}
tmpstr[count - (last_space + 1)] = '\0';
strcpy(substr, tmpstr);
}
if (curline < line_num) {
return NULL;
}
retstr = curses_copy_of(curstr);
return retstr;
}
/* Return the remaining portion of a string after hacking-off line_num lines */
char *
curses_str_remainder(const char *str, int width, int line_num)
{
int last_space, count;
char *retstr;
int curline = 0;
int strsize = strlen(str) + 1;
#if __STDC_VERSION__ >= 199901L
char substr[strsize];
char curstr[strsize];
char tmpstr[strsize];
strcpy(substr, str);
#else
#ifndef BUFSZ
#define BUFSZ 256
#endif
char substr[BUFSZ * 2];
char curstr[BUFSZ * 2];
char tmpstr[BUFSZ * 2];
if (strsize > (BUFSZ * 2) - 1) {
paniclog("curses", "curses_str_remainder() string too long.");
strncpy(substr, str, (BUFSZ * 2) - 2);
substr[(BUFSZ * 2) - 1] = '\0';
} else
strcpy(substr, str);
#endif
while (curline < line_num) {
if (strlen(substr) == 0) {
break;
}
curline++;
last_space = 0;
for (count = 0; count <= width; count++) {
if (substr[count] == ' ') {
last_space = count;
} else if (substr[count] == '\0') {
last_space = count;
break;
}
}
if (last_space == 0) { /* No spaces found */
last_space = count - 1;
}
for (count = 0; count < last_space; count++) {
curstr[count] = substr[count];
}
curstr[count] = '\0';
if (substr[count] == '\0') {
break;
}
for (count = (last_space + 1); count < (int) strlen(substr); count++) {
tmpstr[count - (last_space + 1)] = substr[count];
}
tmpstr[count - (last_space + 1)] = '\0';
strcpy(substr, tmpstr);
}
if (curline < line_num) {
return NULL;
}
retstr = curses_copy_of(substr);
return retstr;
}
/* Determine if the given NetHack winid is a menu window */
boolean
curses_is_menu(winid wid)
{
if ((wid > 19) && !(wid % 2)) { /* Even number */
return TRUE;
} else {
return FALSE;
}
}
/* Determine if the given NetHack winid is a text window */
boolean
curses_is_text(winid wid)
{
if ((wid > 19) && (wid % 2)) { /* Odd number */
return TRUE;
} else {
return FALSE;
}
}
/* Replace certain characters with portable drawing characters if
cursesgraphics option is enabled */
int
curses_convert_glyph(int ch, int glyph)
{
int symbol;
if (Is_rogue_level(&u.uz)) {
return ch;
}
/* Save some processing time by returning if the glyph represents
an object that we don't have custom characters for */
if (!glyph_is_cmap(glyph)) {
return ch;
}
symbol = glyph_to_cmap(glyph);
/* If user selected a custom character for this object, don't
override this. */
if (((glyph_is_cmap(glyph)) && (ch != showsyms[symbol]))) {
return ch;
}
switch (symbol) {
case S_vwall:
return ACS_VLINE;
case S_hwall:
return ACS_HLINE;
case S_tlcorn:
return ACS_ULCORNER;
case S_trcorn:
return ACS_URCORNER;
case S_blcorn:
return ACS_LLCORNER;
case S_brcorn:
return ACS_LRCORNER;
case S_crwall:
return ACS_PLUS;
case S_tuwall:
return ACS_BTEE;
case S_tdwall:
return ACS_TTEE;
case S_tlwall:
return ACS_RTEE;
case S_trwall:
return ACS_LTEE;
case S_tree:
return ACS_PLMINUS;
case S_corr:
return ACS_CKBOARD;
case S_litcorr:
return ACS_CKBOARD;
}
return ch;
}
/* Move text cursor to specified coordinates in the given NetHack window */
void
curses_move_cursor(winid wid, int x, int y)
{
int sx, sy, ex, ey;
int xadj = 0;
int yadj = 0;
#ifndef PDCURSES
WINDOW *win = curses_get_nhwin(MAP_WIN);
#endif
if (wid != MAP_WIN) {
return;
}
#ifdef PDCURSES
/* PDCurses seems to not handle wmove correctly, so we use move and
physical screen coordinates instead */
curses_get_window_xy(wid, &xadj, &yadj);
#endif
curs_x = x + xadj;
curs_y = y + yadj;
curses_map_borders(&sx, &sy, &ex, &ey, x, y);
if (curses_window_has_border(wid)) {
curs_x++;
curs_y++;
}
if (x >= sx && x <= ex && y >= sy && y <= ey) {
/* map column #0 isn't used; shift column #1 to first screen column */
curs_x -= (sx + 1);
curs_y -= sy;
#ifdef PDCURSES
move(curs_y, curs_x);
#else
wmove(win, curs_y, curs_x);
#endif
}
}
/* Perform actions that should be done every turn before nhgetch() */
void
curses_prehousekeeping()
{
#ifndef PDCURSES
WINDOW *win = curses_get_nhwin(MAP_WIN);
#endif /* PDCURSES */
if ((curs_x > -1) && (curs_y > -1)) {
curs_set(1);
#ifdef PDCURSES
/* PDCurses seems to not handle wmove correctly, so we use move
and physical screen coordinates instead */
move(curs_y, curs_x);
#else
wmove(win, curs_y, curs_x);
#endif /* PDCURSES */
curses_refresh_nhwin(MAP_WIN);
}
}
/* Perform actions that should be done every turn after nhgetch() */
void
curses_posthousekeeping()
{
curs_set(0);
/* curses_decrement_highlights(FALSE); */
curses_clear_unhighlight_message_window();
}
void
curses_view_file(const char *filename, boolean must_exist)
{
winid wid;
anything Id;
char buf[BUFSZ];
menu_item *selected = NULL;
dlb *fp = dlb_fopen(filename, "r");
if (fp == NULL) {
if (must_exist)
pline("Cannot open \"%s\" for reading!", filename);
return;
}
wid = curses_get_wid(NHW_MENU);
curses_create_nhmenu(wid);
Id = zeroany;
while (dlb_fgets(buf, BUFSZ, fp) != NULL) {
curses_add_menu(wid, NO_GLYPH, &Id, 0, 0, A_NORMAL, buf, FALSE);
}
dlb_fclose(fp);
curses_end_menu(wid, "");
curses_select_menu(wid, PICK_NONE, &selected);
curses_del_wid(wid);
}
void
curses_rtrim(char *str)
{
char *s;
for (s = str; *s != '\0'; ++s);
for (--s; isspace(*s) && s > str; --s);
if (s == str)
*s = '\0';
else
*(++s) = '\0';
}
/* Read numbers until non-digit is encountered, and return number
in int form. */
int
curses_get_count(int first_digit)
{
long current_count = first_digit;
int current_char;
current_char = curses_read_char();
while (isdigit(current_char)) {
current_count = (current_count * 10) + (current_char - '0');
if (current_count > LARGEST_INT) {
current_count = LARGEST_INT;
}
custompline(SUPPRESS_HISTORY, "Count: %ld", current_count);
current_char = curses_read_char();
}
ungetch(current_char);
if (current_char == '\033') { /* Cancelled with escape */
current_count = -1;
}
return current_count;
}
/* Convert the given NetHack text attributes into the format curses
understands, and return that format mask. */
int
curses_convert_attr(int attr)
{
int curses_attr;
/* first, strip off control flags masked onto the display attributes
(caller should have already done this...) */
attr &= ~(ATR_URGENT | ATR_NOHISTORY);
switch (attr) {
case ATR_NONE:
curses_attr = A_NORMAL;
break;
case ATR_ULINE:
curses_attr = A_UNDERLINE;
break;
case ATR_BOLD:
curses_attr = A_BOLD;
break;
case ATR_DIM:
curses_attr = A_DIM;
break;
case ATR_BLINK:
curses_attr = A_BLINK;
break;
case ATR_INVERSE:
curses_attr = A_REVERSE;
break;
default:
curses_attr = A_NORMAL;
}
return curses_attr;
}
/* Map letter attributes from a string to bitmask. Return mask on
success (might be 0), or -1 if not found. */
int
curses_read_attrs(const char *attrs)
{
int retattr = 0;
if (!attrs || !*attrs)
return A_NORMAL;
if (strchr(attrs, 'b') || strchr(attrs, 'B'))
retattr |= A_BOLD;
if (strchr(attrs, 'i') || strchr(attrs, 'I')) /* inverse */
retattr |= A_REVERSE;
if (strchr(attrs, 'u') || strchr(attrs, 'U'))
retattr |= A_UNDERLINE;
if (strchr(attrs, 'k') || strchr(attrs, 'K'))
retattr |= A_BLINK;
if (strchr(attrs, 'd') || strchr(attrs, 'D'))
retattr |= A_DIM;
#ifdef A_ITALIC
if (strchr(attrs, 't') || strchr(attrs, 'T'))
retattr |= A_ITALIC;
#endif
#ifdef A_LEFTLINE
if (strchr(attrs, 'l') || strchr(attrs, 'L'))
retattr |= A_LEFTLINE;
#endif
#ifdef A_RIGHTLINE
if (strchr(attrs, 'r') || strchr(attrs, 'R'))
retattr |= A_RIGHTLINE;
#endif
if (retattr == 0) {
/* still default; check for none/normal */
if (strchr(attrs, 'n') || strchr(attrs, 'N'))
retattr = A_NORMAL;
else
retattr = -1; /* error */
}
return retattr;
}
/* format iflags.wc2_petattr into "+a+b..." for set bits a, b, ...
(used by core's 'O' command; return value points past leading '+') */
char *
curses_fmt_attrs(outbuf)
char *outbuf;
{
int attr = iflags.wc2_petattr;
outbuf[0] = '\0';
if (attr == A_NORMAL) {
Strcpy(outbuf, "+N(None)");
} else {
if (attr & A_BOLD)
Strcat(outbuf, "+B(Bold)");
if (attr & A_REVERSE)
Strcat(outbuf, "+I(Inverse)");
if (attr & A_UNDERLINE)
Strcat(outbuf, "+U(Underline)");
if (attr & A_BLINK)
Strcat(outbuf, "+K(blinK)");
if (attr & A_DIM)
Strcat(outbuf, "+D(Dim)");
#ifdef A_ITALIC
if (attr & A_ITALIC)
Strcat(outbuf, "+T(iTalic)");
#endif
#ifdef A_LEFTLINE
if (attr & A_LEFTLINE)
Strcat(outbuf, "+L(Left line)");
#endif
#ifdef A_RIGHTLINE
if (attr & A_RIGHTLINE)
Strcat(outbuf, "+R(Right line)");
#endif
}
if (!*outbuf)
Sprintf(outbuf, "+unknown [%d]", attr);
return &outbuf[1];
}
/* Convert special keys into values that NetHack can understand.
Currently this is limited to arrow keys, but this may be expanded. */
int
curses_convert_keys(int key)
{
int ret = key;
if (ret == '\033') {
ret = parse_escape_sequence();
}
/* Handle arrow keys */
switch (key) {
case KEY_BACKSPACE:
/* we can't distinguish between a separate backspace key and
explicit Ctrl+H intended to rush to the left; without this,
a value for ^H greater than 255 is passed back to core's
readchar() and stripping the value down to 0..255 yields ^G! */
ret = C('H');
break;
case KEY_LEFT:
if (iflags.num_pad) {
ret = '4';
} else {
ret = 'h';
}
break;
case KEY_RIGHT:
if (iflags.num_pad) {
ret = '6';
} else {
ret = 'l';
}
break;
case KEY_UP:
if (iflags.num_pad) {
ret = '8';
} else {
ret = 'k';
}
break;
case KEY_DOWN:
if (iflags.num_pad) {
ret = '2';
} else {
ret = 'j';
}
break;
#ifdef KEY_A1
case KEY_A1:
if (iflags.num_pad) {
ret = '7';
} else {
ret = 'y';
}
break;
#endif /* KEY_A1 */
#ifdef KEY_A3
case KEY_A3:
if (iflags.num_pad) {
ret = '9';
} else {
ret = 'u';
}
break;
#endif /* KEY_A3 */
#ifdef KEY_C1
case KEY_C1:
if (iflags.num_pad) {
ret = '1';
} else {
ret = 'b';
}
break;
#endif /* KEY_C1 */
#ifdef KEY_C3
case KEY_C3:
if (iflags.num_pad) {
ret = '3';
} else {
ret = 'n';
}
break;
#endif /* KEY_C3 */
#ifdef KEY_B2
case KEY_B2:
if (iflags.num_pad) {
ret = '5';
} else {
ret = 'g';
}
break;
#endif /* KEY_B2 */
}
return ret;
}
/*
* We treat buttons 2 and 3 as equivalent so that it doesn't matter which
* one is for right-click and which for middle-click. The core uses CLICK_2
* for right-click ("not left"-click) even though 2 might be middle button.
*
* BUTTON_CTRL was enabled at one point but was not working as intended.
* Ctrl+left_click was generating pairs of duplicated events with Ctrl and
* Report_mouse_position bits set (even though Report_mouse_position wasn't
* enabled) but no button click bit set. (It sort of worked because Ctrl+
* Report_mouse_position wasn't a left click so passed along CLICK_2, but
* the duplication made that too annoying to use. Attempting to immediately
* drain the second one wasn't working as intended either.)
*/
#define MOUSEBUTTONS (BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED)
/* Process mouse events. Mouse movement is processed until no further
mouse movement events are available. Returns 0 for a mouse click
event, or the first non-mouse key event in the case of mouse
movement. */
int
curses_get_mouse(int *mousex, int *mousey, int *mod)
{
int key = '\033';
#ifdef NCURSES_MOUSE_VERSION
MEVENT event;
if (getmouse(&event) == OK) { /* True if user has clicked */
if ((event.bstate & MOUSEBUTTONS) != 0) {
/*
* The ncurses man page documents wmouse_trafo() incorrectly.
* It says that last argument 'TRUE' translates from screen
* to window and 'FALSE' translates from window to screen,
* but those are backwards. The mouse_trafo() macro calls
* last argument 'to_screen', suggesting that the backwards
* implementation is the intended behavior and the man page
* is describing it wrong.
*/
/* See if coords are in map window & convert coords */
if (wmouse_trafo(mapwin, &event.y, &event.x, FALSE)) {
key = '\0'; /* core uses this to detect a mouse click */
*mousex = event.x + 1; /* +1: screen 0..78 is map 1..79 */
*mousey = event.y;
if (curses_window_has_border(MAP_WIN)) {
(*mousex)--;
(*mousey)--;
}
*mod = ((event.bstate & (BUTTON1_CLICKED | BUTTON_CTRL))
== BUTTON1_CLICKED) ? CLICK_1 : CLICK_2;
}
}
}
#endif /* NCURSES_MOUSE_VERSION */
return key;
}
void
curses_mouse_support(mode)
int mode; /* 0: off, 1: on, 2: alternate on */
{
#ifdef NCURSES_MOUSE_VERSION
mmask_t result, oldmask, newmask;
if (!mode)
newmask = 0;
else
newmask = MOUSEBUTTONS; /* buttons 1, 2, and 3 */
result = mousemask(newmask, &oldmask);
nhUse(result);
#else
nhUse(mode);
#endif
}
static int
parse_escape_sequence(void)
{
#ifndef PDCURSES
int ret;
timeout(10);
ret = getch();
if (ret != ERR) { /* Likely an escape sequence */
if (((ret >= 'a') && (ret <= 'z')) || ((ret >= '0') && (ret <= '9'))) {
ret |= 0x80; /* Meta key support for most terminals */
} else if (ret == 'O') { /* Numeric keypad */
ret = getch();
if ((ret != ERR) && (ret >= 112) && (ret <= 121)) {
ret = ret - 112 + '0'; /* Convert to number */
} else {
ret = '\033'; /* Escape */
}
}
} else {
ret = '\033'; /* Just an escape character */
}
timeout(-1);
return ret;
#else
return '\033';
#endif /* !PDCURSES */
}
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