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trader/src/intf.c

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/************************************************************************
* *
* Star Traders: A Game of Interstellar Trading *
* Copyright (C) 1990-2024, John Zaitseff *
* *
************************************************************************/
/*
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
This file, intf.c, contains the actual implementation of basic text
input/output routines as used in Star Traders.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see https://www.gnu.org/licenses/.
*/
#include "trader.h"
/************************************************************************
* Global variable definitions *
************************************************************************/
WINDOW *curwin = NULL; // Top-most (current) window
bool use_color = true; // True to use colour
// Character renditions (attributes) used by Star Traders
chtype attr_root_window; // Root window (behind all others)
chtype attr_game_title; // One-line game title at top
chtype attr_normal_window; // Normal window background
chtype attr_title; // Normal window title
chtype attr_subtitle; // Normal window subtitle
chtype attr_normal; // Normal window text
chtype attr_highlight; // Normal window highlighted string
chtype attr_blink; // Blinking text in normal window
chtype attr_keycode; // Make keycodes like <1> stand out
chtype attr_choice; // Make map/company choices stand out
chtype attr_input_field; // Background for input text field
chtype attr_waitforkey; // "Press any key", normal window
chtype attr_map_window; // Map window background
chtype attr_mapwin_title; // Map window title (player name, turn)
chtype attr_mapwin_highlight; // Map window title highlight
chtype attr_mapwin_blink; // Map window title blinking text
chtype attr_map_empty; // On map, empty space
chtype attr_map_outpost; // On map, outpost
chtype attr_map_star; // On map, star
chtype attr_map_company; // On map, company
chtype attr_map_choice; // On map, a choice of moves
chtype attr_status_window; // Status window background
chtype attr_error_window; // Error message window background
chtype attr_error_title; // Error window title
chtype attr_error_normal; // Error window ordinary text
chtype attr_error_highlight; // Error window highlighted string
chtype attr_error_waitforkey; // "Press any key", error window
/************************************************************************
* Game printing global variable definitions *
************************************************************************/
wchar_t *keycode_company; // Keycodes for each company
wchar_t *printable_map_val; // Printable output for each map value
chtype *chtype_map_val[MAX_COMPANIES + 3]; // as chtype strings
wchar_t *keycode_game_move; // Keycodes for each game move
wchar_t *printable_game_move; // Printable output for each game move
chtype *chtype_game_move[NUMBER_MOVES]; // as chtype strings
/************************************************************************
* Module-specific constants, type declarations and macros *
************************************************************************/
typedef struct txwin {
WINDOW *win; // Pointer to window structure
struct txwin *next; // Next window in stack
struct txwin *prev; // Previous window in stack
} txwin_t;
// Initialisation macros used in init_screen()
#define __stringify(s) #s
#define init_game_str(_var, _default, _checkpos) \
do { \
char *s = gettext(_default); \
if (xmbstowcs(buf, s, BUFSIZE) < (_checkpos) + 1 \
|| buf[_checkpos] != L'|') { \
err_exit(_("%s: string has incorrect format: '%s'"), \
__stringify(_var), s); \
} \
(_var) = xwcsdup(buf); \
(_var)[_checkpos] = L'\0'; \
} while (0)
#define init_game_chstr(_chvar, _var, _attr, _err) \
do { \
chtype *p = chbuf; \
wchar_t c; \
int w, n; \
mbstate_t mbstate; \
\
c = (_var); \
if ((w = wcwidth(c)) < 1) { \
err_exit(_("%s: character has illegal width: '%lc'"), \
__stringify(_err), (wint_t) c); \
} \
\
memset(&mbstate, 0, sizeof(mbstate)); \
n = xwcrtomb(convbuf, c, &mbstate); \
for (int i = 0; i < n; i++) { \
*p++ = (unsigned char) convbuf[i] | (_attr); \
} \
\
if (w == 1) { \
n = xwcrtomb(convbuf, L' ', &mbstate); \
for (int i = 0; i < n; i++) { \
*p++ = (unsigned char) convbuf[i] | attr_map_empty; \
} \
} \
\
n = xwcrtomb(convbuf, L'\0', &mbstate); \
for (int i = 0; i < n; i++) { \
*p++ = (unsigned char) convbuf[i]; \
} \
\
(_chvar) = xchstrdup(chbuf); \
} while (0)
// Declarations for argument processing in mkchstr()
#define MAXFMTARGS 8 // Maximum number of positional arguments
enum argument_type {
TYPE_NONE, // No type yet assigned
TYPE_CHAR, // char
TYPE_WCHAR, // wint_t
TYPE_INT, // int
TYPE_LONGINT, // long int
TYPE_DOUBLE, // double
TYPE_STRING, // const char *
TYPE_WSTRING // const wchar_t *
};
struct argument {
enum argument_type a_type;
union a {
char a_char;
wint_t a_wchar;
int a_int;
long int a_longint;
double a_double;
const char *a_string;
const wchar_t *a_wstring;
} a;
};
#define MAXFMTSPECS 16 // Maximum number of conversion specifiers
struct convspec {
wchar_t spec; // Conversion specifier: c d f N s
int arg_num; // Which variable argument to use
ptrdiff_t len; // Length of conversion specifier, 0 = unused
int precision; // Precision value
bool flag_group; // Flag "'" (thousands grouping)
bool flag_nosym; // Flag "!" (omit currency symbol)
bool flag_prec; // Flag "." (precision)
bool flag_long; // Length modifier "l" (long)
};
/************************************************************************
* Module-specific variables *
************************************************************************/
txwin_t *topwin = NULL; // Top-most txwin structure
txwin_t *firstwin = NULL; // First (bottom-most) txwin structure
/************************************************************************
* Module-specific function prototypes *
************************************************************************/
/*
Function: init_title - Draw the main window title
Parameters: (none)
Returns: (nothing)
This function draws the main window game title, "Star Traders", and
clears the rest of the screen. It does NOT call wrefresh().
*/
static void init_title (void);
/*
Function: sigterm_handler - Handle program termination signals
Parameters: sig - Signal number
Returns: (nothing)
This function handles termination signals (like SIGINT, SIGTERM and
SIGQUIT) by clearing the screen, uninstalling itself and reraising the
signal.
*/
static void sigterm_handler (int sig);
/*
Function: txresize - Handle a terminal resize event
Parameters: (none)
Returns: (nothing)
This function handles a SIGWINCH (terminal window size changed) event
by refreshing Curses windows as appropriate.
*/
#ifdef HANDLE_RESIZE_EVENTS
static void txresize (void);
#endif
/*
Function: mkchstr_parse - Parse the format string for mkchstr()
Parameters: format - Format string as described for mkchstr()
format_arg - Pointer to variable arguments array
format_spec - Pointer to conversion specifiers array
args - Variable argument list passed to mkchstr()
Returns: int - 0 if OK, -1 if error (with errno set)
This helper function parses the format string passed to mkchstr(),
setting the format_arg and format_spec arrays appropriately.
*/
static int mkchstr_parse (const wchar_t *restrict format,
struct argument *restrict format_arg,
struct convspec *restrict format_spec,
va_list args);
/*
Function: mkchstr_add - Add one character to the mkchstr() buffers
Parameters: outbuf - Pointer to wchar_t pointer in which to store char
attrbuf - Pointer to chtype pointer in which to store attr
count - Pointer to number of wchar_t elements left in outbuf
attr - Character rendition to use
maxlines - Maximum number of screen lines to use
maxwidth - Maximum width of each line, in column positions
line - Pointer to current line number
width - Pointer to current line width
lastspc - Pointer to wchar_t * pointer to last space
spcattr - Pointer to corresponding place in attrbuf
widthspc - Pointer to width just before last space
widthbuf - Pointer to buffer to store widths of each line
widthbufsize - Number of int elements in widthbuf
str - Pointer to const wchar_t * pointer to string
Returns: int - -1 on error (with errno set), 0 otherwise
This helper function adds one wide character from **str to **outbuf,
and the character rendition attr to **attrbuf, incrementing *str and
*outbuf and decrementing *count. If a string is too long for the
current line, a previous space in the current line is converted to a
new line (if possible), else a new line is inserted into the current
location (if not on the last line). *line, *width, *lastspc, *widthspc
and widthbuf[] are all updated appropriately.
*/
static int mkchstr_add (wchar_t *restrict *restrict outbuf,
chtype *restrict *restrict attrbuf,
int *restrict count, chtype attr, int maxlines,
int maxwidth, int *restrict line, int *restrict width,
wchar_t *restrict *restrict lastspc,
chtype *restrict *restrict spcattr,
int *restrict widthspc, int *restrict widthbuf,
int widthbufsize,
const wchar_t *restrict *restrict str);
/*
Function: mkchstr_conv - Convert (wcbuf, attrbuf) to chbuf
Parameters: chbuf - Pointer to chtype buffer in which to store string
chbufsize - Number of chtype elements in chbuf
wcbuf - Wide-character string from which to convert
attrbuf - Associated character rendition array
Returns: (nothing)
This helper function converts the wide-character string in wcbuf and
the array of character renditions in attrbuf to a chtype * string.
*/
static void mkchstr_conv (chtype *restrict chbuf, int chbufsize,
wchar_t *restrict wcbuf, chtype *restrict attrbuf);
/*
Function: getwch - Get a wide character from the keyboard
Parameters: win - Window to use (should be curwin)
wch - Pointer to wide character result
Returns: int - OK, KEY_CODE_YES or ERR
This internal function waits for a complete wide character to be typed
on the keyboard. OK is returned if wch contains an ordinary wide
character, KEY_CODE_YES if a function key or control key, or ERR on
error.
This function is either a wrapper (with modifications) for wget_wch()
from Curses, or an implementation of that function using wgetch().
*/
static int getwch (WINDOW *win, wint_t *restrict wch);
/*
Function: cpos_end - Adjust cpos and st for printing the ending part of buf
Parameters: buf - Pointer to current editing buffer
cpos - Pointer to current cursor position (result)
st - Pointer to current starting offset for buf[] (result)
clen - Current column width of entire string
width - Width of editing field in column spaces
len - Length of string being edited (wchar_t elements)
Returns: (nothing)
This helper function adjusts *cpos and *st so that the cursor is placed
at the end of the current editing buffer buf[].
*/
static void cpos_end (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int clen, int width, int len);
/*
Function: cpos_dec - Adjust cpos and st: scroll to the left by w columns
Parameters: buf - Pointer to current editing buffer
cpos - Pointer to current cursor position (result)
st - Pointer to current starting offset for buf[] (result)
w - Number of columns to scroll left
width - Width of editing field in column spaces
Returns: (nothing)
This helper function adjusts *cpos and *st so that the cursor is moved
to the left by w column positions.
*/
static void cpos_dec (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int w, int width);
/*
Function: cpos_inc - Adjust cpos and st: scroll to the right by w columns
Parameters: buf - Pointer to current editing buffer
cpos - Pointer to current cursor position (result)
st - Pointer to current starting offset for buf[] (result)
w - Number of columns to scroll right
width - Width of editing field in column spaces
Returns: (nothing)
This helper function adjusts *cpos and *st so that the cursor is moved
to the right by w column positions.
*/
static void cpos_inc (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int w, int width);
/*
Function: txinput_fixup - Copy strings with fixup
Parameters: dest - Destination buffer of size BUFSIZE
src - Source buffer of size BUFSIZE
isfloat - True if src contains a floating point number
Returns: (nothing)
This helper function copies the string in src to dest, performing
certain fixups along the way. In particular, thousands separators are
removed and (if isfloat is true) the monetary radix (decimal point) is
replaced by the normal one.
This function is used by gettxdouble() and gettxlong() to share some
common code.
*/
static void txinput_fixup (wchar_t *restrict dest, const wchar_t *restrict src,
bool isfloat);
/************************************************************************
* Basic text input/output function definitions *
************************************************************************/
/* These functions are documented either in the file "intf.h" or in the
comments above. */
/***********************************************************************/
// init_screen: Initialise the screen (terminal display)
void init_screen (void)
{
struct sigaction sa;
// Initialise signal handlers
sa.sa_handler = sigterm_handler;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGINT);
sigaddset(&sa.sa_mask, SIGTERM);
sigaddset(&sa.sa_mask, SIGQUIT);
if (sigaction(SIGINT, &sa, NULL) == -1) {
errno_exit("sigaction(SIGINT)");
}
if (sigaction(SIGTERM, &sa, NULL) == -1) {
errno_exit("sigaction(SIGTERM)");
}
if (sigaction(SIGQUIT, &sa, NULL) == -1) {
errno_exit("sigaction(SIGQUIT)");
}
// Initialise the screen
initscr();
if (COLS < MIN_COLS || LINES < MIN_LINES) {
err_exit(_("terminal size is too small (%d x %d required)"),
MIN_COLS, MIN_LINES);
}
// Initialise variables controlling the stack of windows
curwin = stdscr;
topwin = NULL;
firstwin = NULL;
noecho();
curs_set(CURS_OFF);
raw();
// Initialise all character renditions used in the game
use_color = ! option_no_color && has_colors();
if (use_color) {
start_color();
init_pair(1, COLOR_BLACK, COLOR_WHITE);
init_pair(2, COLOR_BLUE, COLOR_BLACK);
init_pair(3, COLOR_GREEN, COLOR_BLACK);
init_pair(4, COLOR_CYAN, COLOR_BLUE);
init_pair(5, COLOR_RED, COLOR_BLACK);
init_pair(6, COLOR_YELLOW, COLOR_BLACK);
init_pair(7, COLOR_YELLOW, COLOR_BLUE);
init_pair(8, COLOR_YELLOW, COLOR_CYAN);
init_pair(9, COLOR_WHITE, COLOR_BLACK);
init_pair(10, COLOR_WHITE, COLOR_BLUE);
init_pair(11, COLOR_WHITE, COLOR_RED);
attr_root_window = COLOR_PAIR(9);
attr_game_title = COLOR_PAIR(8) | A_BOLD;
attr_normal_window = COLOR_PAIR(10);
attr_title = COLOR_PAIR(6) | A_BOLD;
attr_subtitle = COLOR_PAIR(9);
attr_normal = attr_normal_window;
attr_highlight = COLOR_PAIR(7) | A_BOLD;
attr_blink = COLOR_PAIR(7) | A_BOLD | A_BLINK;
attr_keycode = COLOR_PAIR(6) | A_BOLD;
attr_choice = COLOR_PAIR(11) | A_BOLD;
attr_input_field = COLOR_PAIR(9);
attr_waitforkey = COLOR_PAIR(4);
attr_map_window = COLOR_PAIR(9);
attr_mapwin_title = COLOR_PAIR(10);
attr_mapwin_highlight = COLOR_PAIR(7) | A_BOLD;
attr_mapwin_blink = COLOR_PAIR(7) | A_BOLD | A_BLINK;
attr_map_empty = COLOR_PAIR(2) | A_BOLD;
attr_map_outpost = COLOR_PAIR(3) | A_BOLD;
attr_map_star = COLOR_PAIR(6) | A_BOLD;
attr_map_company = COLOR_PAIR(5) | A_BOLD;
attr_map_choice = COLOR_PAIR(11) | A_BOLD;
attr_status_window = COLOR_PAIR(1);
attr_error_window = COLOR_PAIR(11);
attr_error_title = COLOR_PAIR(6) | A_BOLD;
attr_error_normal = attr_error_window;
attr_error_highlight = COLOR_PAIR(11) | A_BOLD;
attr_error_waitforkey = COLOR_PAIR(11);
} else {
// No colour is to be used
attr_root_window = A_NORMAL;
attr_game_title = A_REVERSE | A_BOLD;
attr_normal_window = A_NORMAL;
attr_title = A_REVERSE;
attr_subtitle = A_REVERSE;
attr_normal = attr_normal_window;
attr_highlight = A_BOLD;
attr_blink = A_BOLD | A_BLINK;
attr_keycode = A_REVERSE;
attr_choice = A_REVERSE;
attr_input_field = A_BOLD | '_';
attr_waitforkey = A_NORMAL;
attr_map_window = A_NORMAL;
attr_mapwin_title = A_NORMAL;
attr_mapwin_highlight = A_BOLD;
attr_mapwin_blink = A_BOLD | A_BLINK;
attr_map_empty = A_NORMAL;
attr_map_outpost = A_NORMAL;
attr_map_star = A_BOLD;
attr_map_company = A_BOLD;
attr_map_choice = A_REVERSE;
attr_status_window = A_REVERSE;
attr_error_window = A_REVERSE;
attr_error_title = A_BOLD;
attr_error_normal = attr_error_window;
attr_error_highlight = A_REVERSE;
attr_error_waitforkey = A_REVERSE;
}
init_title();
refresh();
/* Initialise strings used for keycode input and map representations.
Each string must have an ASCII vertical line (U+007C) in the
correct position, followed by context information (such as
"input|Company" and "output|MapVals"). This is done to overcome a
limitation of gettext_noop() and N_() that does NOT allow context
IDs. This vertical line is replaced by a NUL character to
terminate the resulting string. The vertical line MAY appear in
other positions; if so, it is handled correctly. */
wchar_t *buf = xmalloc(BUFSIZE * sizeof(wchar_t));
char convbuf[MB_LEN_MAX + 1];
chtype chbuf[MB_LEN_MAX * 3 + 1];
init_game_str(keycode_company, default_keycode_company, MAX_COMPANIES);
init_game_str(keycode_game_move, default_keycode_game_move, NUMBER_MOVES);
init_game_str(printable_map_val, default_printable_map_val, MAX_COMPANIES + 3);
init_game_str(printable_game_move, default_printable_game_move, NUMBER_MOVES);
/* To save time later, convert each output character to its own
chtype string, with appropriate attributes. */
init_game_chstr(chtype_map_val[MAP_TO_INDEX(MAP_EMPTY)],
printable_map_val[MAP_TO_INDEX(MAP_EMPTY)],
attr_map_empty, MAP_EMPTY);
init_game_chstr(chtype_map_val[MAP_TO_INDEX(MAP_OUTPOST)],
printable_map_val[MAP_TO_INDEX(MAP_OUTPOST)],
attr_map_outpost, MAP_OUTPOST);
init_game_chstr(chtype_map_val[MAP_TO_INDEX(MAP_STAR)],
printable_map_val[MAP_TO_INDEX(MAP_STAR)],
attr_map_star, MAP_STAR);
for (int i = 0; i < MAX_COMPANIES; i++) {
init_game_chstr(chtype_map_val[MAP_TO_INDEX(COMPANY_TO_MAP(i))],
printable_map_val[MAP_TO_INDEX(COMPANY_TO_MAP(i))],
attr_map_company, COMPANY_TO_MAP(i));
}
for (int i = 0; i < NUMBER_MOVES; i++) {
init_game_chstr(chtype_game_move[i], printable_game_move[i],
attr_map_choice, printable_game_move[i]);
}
free(buf);
}
/***********************************************************************/
// end_screen: Deinitialise the screen (terminal display)
void end_screen (void)
{
delalltxwin();
curs_set(CURS_ON);
clear();
refresh();
endwin();
curwin = NULL;
topwin = NULL;
firstwin = NULL;
}
/***********************************************************************/
// init_title: Draw the main window title
void init_title (void)
{
bkgd(attr_root_window);
attrset(attr_root_window);
clear();
mvwhline(stdscr, 0, 0, ' ' | attr_game_title, COLS);
center(stdscr, 0, 0, attr_game_title, 0, 0, 1, _("Star Traders"));
}
/***********************************************************************/
// sigterm_handler: Handle program termination signals
void sigterm_handler (int sig)
{
struct sigaction sa;
/* The following Curses functions are NOT async-signal-safe (ie, are
not reentrant) as they may well call malloc() or free(). However,
it does allow us to terminate with the correct signal without
having convoluted code in the main program. */
curs_set(CURS_ON);
clear();
refresh();
endwin();
// Reraise the same signal, using the system-default handler
sa.sa_handler = SIG_DFL;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(sig, &sa, NULL);
raise(sig);
}
/***********************************************************************/
// newtxwin: Create a new window, inserted into window stack
WINDOW *newtxwin (int nlines, int ncols, int begin_y, int begin_x,
bool dofill, chtype bkgd_attr)
{
WINDOW *win;
txwin_t *nw;
// Centre the window, if required
if (begin_y == WCENTER) {
begin_y = (nlines == 0) ? 0 : (LINES - nlines) / 2;
}
if (begin_x == WCENTER) {
begin_x = (ncols == 0) ? 0 : (COLS - ncols) / 2;
}
assert(nlines > 0);
assert(ncols > 0);
assert(begin_y >= 0);
assert(begin_x >= 0);
// Create the new window
win = newwin(nlines, ncols, begin_y, begin_x);
if (win == NULL) {
err_exit_nomem();
}
// Insert the new window into the txwin stack
nw = xmalloc(sizeof(txwin_t));
nw->win = win;
nw->next = NULL;
nw->prev = topwin;
if (topwin != NULL) {
topwin->next = nw;
}
topwin = nw;
curwin = win;
if (firstwin == NULL) {
firstwin = nw;
}
// Paint the background and border, if required
if (dofill) {
wbkgd(win, bkgd_attr);
box(win, 0, 0);
}
if (! use_color) {
wbkgdset(win, A_NORMAL);
}
return win;
}
/***********************************************************************/
// deltxwin: Delete the top-most window in the window stack
int deltxwin (void)
{
txwin_t *cur, *prev;
int ret;
if (topwin == NULL) {
return ERR;
}
// Remove window from the txwin stack
cur = topwin;
prev = topwin->prev;
topwin = prev;
if (prev != NULL) {
prev->next = NULL;
curwin = prev->win;
} else {
firstwin = NULL;
curwin = stdscr;
}
ret = delwin(cur->win);
free(cur);
return ret;
}
/***********************************************************************/
// delalltxwin: Delete all windows in the window stack
int delalltxwin (void)
{
while (topwin != NULL) {
deltxwin();
}
return OK;
}
/***********************************************************************/
// txrefresh: Redraw all windows in the window stack
int txrefresh (void)
{
touchwin(stdscr);
wnoutrefresh(stdscr);
for (txwin_t *p = firstwin; p != NULL; p = p->next) {
touchwin(p->win);
wnoutrefresh(p->win);
}
return doupdate();
}
/***********************************************************************/
// txresize: Handle a terminal resize event
#ifdef HANDLE_RESIZE_EVENTS
void txresize (void)
{
/* The current implementation cannot resize windows per se: a given
window would have to be destroyed and recreated in the new
location, then redrawn, most likely via a call-back function.
We just redraw the game title, refresh all windows and hope for
the best! */
init_title();
txrefresh();
}
#endif // HANDLE_RESIZE_EVENTS
/***********************************************************************/
// txdlgbox: Display a dialog box and wait for any key
int txdlgbox (int maxlines, int ncols, int begin_y, int begin_x,
chtype bkgd_attr, chtype title_attr, chtype norm_attr,
chtype alt1_attr, chtype alt2_attr, chtype keywait_attr,
const char *restrict boxtitle, const char *restrict format, ...)
{
bool usetitle = (boxtitle != NULL);
chtype *chbuf;
int *widthbuf;
int lines;
va_list args;
assert(maxlines > 0);
chbuf = xmalloc(BUFSIZE * sizeof(chtype));
widthbuf = xmalloc(maxlines * sizeof(int));
va_start(args, format);
lines = vmkchstr(chbuf, BUFSIZE, norm_attr, alt1_attr, alt2_attr, maxlines,
ncols - 4, widthbuf, maxlines, format, args);
va_end(args);
newtxwin(usetitle ? lines + 6 : lines + 5, ncols, begin_y, begin_x,
true, bkgd_attr);
if (usetitle) {
center(curwin, 1, 0, title_attr, 0, 0, 1, boxtitle);
}
centerch(curwin, usetitle ? 3 : 2, 0, chbuf, lines, widthbuf);
wait_for_key(curwin, getmaxy(curwin) - 2, keywait_attr);
deltxwin();
free(widthbuf);
free(chbuf);
return OK;
}
/***********************************************************************/
// mkchstr: Prepare a string for printing to screen
int mkchstr (chtype *restrict chbuf, int chbufsize, chtype attr_norm,
chtype attr_alt1, chtype attr_alt2, int maxlines, int maxwidth,
int *restrict widthbuf, int widthbufsize,
const char *restrict format, ...)
{
va_list args;
int lines;
va_start(args, format);
lines = vmkchstr(chbuf, chbufsize, attr_norm, attr_alt1, attr_alt2,
maxlines, maxwidth, widthbuf, widthbufsize, format, args);
va_end(args);
return lines;
}
/***********************************************************************/
// mkchstr_parse: Parse the format string for mkchstr()
int mkchstr_parse (const wchar_t *restrict format,
struct argument *restrict format_arg,
struct convspec *restrict format_spec, va_list args)
{
int num_args = 0; // 0 .. MAXFMTARGS
int arg_num = 0; // Current index into format_arg[]
int specs_left = MAXFMTSPECS; // MAXFMTSPECS .. 0 (counting down)
memset(format_arg, 0, MAXFMTARGS * sizeof(format_arg[0]));
memset(format_spec, 0, MAXFMTSPECS * sizeof(format_spec[0]));
while (*format != L'\0') {
switch (*format++) {
case L'^':
// Switch to a different character rendition
if (*format == L'\0') {
errno = EINVAL;
return -1;
} else {
// Ignore next character for now
format++;
}
break;
case L'%':
// Process a conversion specifier
if (*format == L'\0') {
errno = EINVAL;
return -1;
} else if (*format == L'%') {
// Ignore "%%" specifier for now
format++;
} else {
const wchar_t *start = format;
enum argument_type arg_type;
bool inspec = true;
bool flag_posn = false; // Have we already seen "$"?
bool flag_other = false; // Have we seen something else?
int count = 0;
while (inspec && *format != L'\0') {
wchar_t c = *format++;
switch (c) {
case L'0':
// Zero flag, or part of numeric count
if (count == 0) {
// Zero flag is NOT supported
errno = EINVAL;
return -1;
}
count *= 10;
break;
case L'1':
case L'2':
case L'3':
case L'4':
case L'5':
case L'6':
case L'7':
case L'8':
case L'9':
// Part of some numeric count
count = count * 10 + (c - L'0');
break;
case L'$':
// Fixed-position argument
if (flag_posn || flag_other || count == 0) {
errno = EINVAL;
return -1;
}
if (count > MAXFMTARGS) {
errno = E2BIG;
return -1;
}
flag_posn = true;
arg_num = count - 1;
count = 0;
break;
case L'\'':
// Use locale-specific thousands group separator
if (format_spec->flag_group) {
errno = EINVAL;
return -1;
}
format_spec->flag_group = true;
flag_other = true;
break;
case L'!':
// Omit the locale-specific currency symbol
if (format_spec->flag_nosym) {
errno = EINVAL;
return -1;
}
format_spec->flag_nosym = true;
flag_other = true;
break;
case L'.':
// Precision flag
if (format_spec->flag_prec || count != 0) {
errno = EINVAL;
return -1;
}
format_spec->flag_prec = true;
flag_other = true;
break;
case L'l':
// Long length modifier
if (format_spec->flag_long) {
// "ll" is NOT supported
errno = EINVAL;
return -1;
}
format_spec->flag_long = true;
flag_other = true;
break;
case L'c':
// Insert a character (char or wchar_t)
if (format_spec->flag_group || format_spec->flag_nosym
|| format_spec->flag_prec || count != 0) {
errno = EINVAL;
return -1;
}
arg_type = format_spec->flag_long ?
TYPE_WCHAR : TYPE_CHAR;
goto handlefmt;
case L'd':
// Insert an integer (int or long int)
if (format_spec->flag_nosym || format_spec->flag_prec
|| count != 0) {
errno = EINVAL;
return -1;
}
arg_type = format_spec->flag_long ?
TYPE_LONGINT : TYPE_INT;
goto handlefmt;
case L'f':
// Insert a floating-point number (double)
if (format_spec->flag_nosym || format_spec->flag_long ||
(! format_spec->flag_prec && count != 0)) {
errno = EINVAL;
return -1;
}
format_spec->precision = count;
arg_type = TYPE_DOUBLE;
goto handlefmt;
case L'N':
// Insert a monetary amount (double)
if (format_spec->flag_group || format_spec->flag_prec
|| format_spec->flag_long || count != 0) {
errno = EINVAL;
return -1;
}
arg_type = TYPE_DOUBLE;
goto handlefmt;
case L's':
// Insert a string (const char * or const wchar_t *)
if (format_spec->flag_group || format_spec->flag_nosym
|| format_spec->flag_prec || count != 0) {
errno = EINVAL;
return -1;
}
arg_type = format_spec->flag_long ?
TYPE_WSTRING : TYPE_STRING;
handlefmt:
if (arg_num >= MAXFMTARGS || specs_left == 0) {
errno = E2BIG;
return -1;
}
if (format_arg[arg_num].a_type == TYPE_NONE) {
format_arg[arg_num].a_type = arg_type;
} else if (format_arg[arg_num].a_type != arg_type) {
errno = EINVAL;
return -1;
}
format_spec->len = format - start;
format_spec->arg_num = arg_num;
format_spec->spec = c;
arg_num++;
num_args = MAX(num_args, arg_num);
format_spec++;
specs_left--;
inspec = false;
break;
default:
errno = EINVAL;
return -1;
}
}
if (inspec) {
errno = EINVAL;
return -1;
}
}
break;
default:
// Process an ordinary character: do nothing for now
;
}
}
for (int i = 0; i < num_args; format_arg++, i++) {
switch (format_arg->a_type) {
case TYPE_CHAR:
format_arg->a.a_char = (char) va_arg(args, int);
break;
case TYPE_WCHAR:
format_arg->a.a_wchar =
(wint_t) (sizeof(wint_t) < sizeof(int) ?
va_arg(args, int) :
va_arg(args, wint_t));
break;
case TYPE_INT:
format_arg->a.a_int = va_arg(args, int);
break;
case TYPE_LONGINT:
format_arg->a.a_longint = va_arg(args, long int);
break;
case TYPE_DOUBLE:
format_arg->a.a_double = va_arg(args, double);
break;
case TYPE_STRING:
format_arg->a.a_string = va_arg(args, const char *);
break;
case TYPE_WSTRING:
format_arg->a.a_wstring = va_arg(args, const wchar_t *);
break;
default:
/* Cannot allow unused arguments, as we have no way of
knowing how much space they take (cf. int vs. long long
int). */
errno = EINVAL;
return -1;
}
}
return 0;
}
/***********************************************************************/
// mkchstr_add: Add a character to the mkchstr buffer
int mkchstr_add (wchar_t *restrict *restrict outbuf,
chtype *restrict *restrict attrbuf, int *restrict count,
chtype attr, int maxlines, int maxwidth, int *restrict line,
int *restrict width, wchar_t *restrict *restrict lastspc,
chtype *restrict *restrict spcattr, int *restrict widthspc,
int *restrict widthbuf,
int widthbufsize __attribute__((unused)),
const wchar_t *restrict *restrict str)
{
int w, wspc;
if (*line < 0) {
// First character in buffer: start line 0
*line = 0;
}
if (**str == L'\n') {
// Start a new line
if (*line < maxlines - 1) {
*(*outbuf)++ = L'\n';
*(*attrbuf)++ = 0;
(*count)--;
}
widthbuf[*line] = *width;
*width = 0;
*lastspc = NULL;
*spcattr = NULL;
*widthspc = 0;
(*line)++;
(*str)++;
} else {
w = wcwidth(**str);
if (w < 0) {
// We don't support control or non-printable characters
errno = EILSEQ;
return -1;
}
if (*width + w > maxwidth) {
// Current line would be too long to fit in **str
if (! iswspace(**str) && *lastspc != NULL && *line < maxlines - 1) {
// Break on the last space in this line
wspc = wcwidth(**lastspc);
**lastspc = L'\n';
**spcattr = 0;
widthbuf[*line] = *widthspc;
*width -= *widthspc + wspc;
*lastspc = NULL;
*spcattr = NULL;
*widthspc = 0;
(*line)++;
} else {
// Insert a new-line character (if not on last line)
if (*line < maxlines - 1) {
*(*outbuf)++ = L'\n';
*(*attrbuf)++ = 0;
(*count)--;
}
widthbuf[*line] = *width;
*width = 0;
*lastspc = NULL;
*spcattr = NULL;
*widthspc = 0;
(*line)++;
/* Skip any following spaces. This assumes that no-one
will ever have combining diacritical marks following a
(line-breaking) space! */
while (iswspace(**str)) {
if (*(*str)++ == L'\n') {
break;
}
}
}
} else {
// Insert an ordinary character into the output buffer
if (iswspace(**str)) {
*lastspc = *outbuf;
*spcattr = *attrbuf;
*widthspc = *width;
}
*(*outbuf)++ = **str;
*(*attrbuf)++ = attr;
(*count)--;
*width += w;
(*str)++;
}
}
return 0;
}
/***********************************************************************/
// mkchstr_conv: Convert (wcbuf, attrbuf) to chbuf
void mkchstr_conv (chtype *restrict chbuf, int chbufsize,
wchar_t *restrict wcbuf, chtype *restrict attrbuf)
{
char convbuf[MB_LEN_MAX + 1];
char endbuf[MB_LEN_MAX];
mbstate_t mbstate, mbcopy;
size_t endsize, n;
char *p;
bool done;
memset(&mbstate, 0, sizeof(mbstate));
done = false;
while (! done) {
// Make sure we always have enough space for ending shift sequence
memcpy(&mbcopy, &mbstate, sizeof(mbstate));
endsize = wcrtomb(endbuf, L'\0', &mbcopy);
if (endsize == (size_t) -1) {
errno_exit(_("mkchstr_conv: NUL"));
}
// Yes, we want to convert a wide NUL, too!
n = xwcrtomb(convbuf, *wcbuf, &mbstate);
if (chbufsize > (int) endsize + (int) n) {
for (p = convbuf; n > 0; n--, p++, chbuf++, chbufsize--) {
if (*p == '\0' || *p == '\n') {
/* This code assumes '\n' can never appear in a
multibyte string except as a control character---
which is true of all multibyte encodings (I
believe!) */
*chbuf = (unsigned char) *p;
} else {
*chbuf = (unsigned char) *p | *attrbuf;
}
}
} else {
// Not enough space for *wcbuf, so terminate chbuf early
for (p = endbuf; endsize > 0; endsize--, p++, chbuf++) {
*chbuf = (unsigned char) *p;
}
break;
}
done = (*wcbuf == L'\0');
wcbuf++;
attrbuf++;
}
}
/***********************************************************************/
// vmkchstr: Prepare a string for printing to screen
int vmkchstr (chtype *restrict chbuf, int chbufsize, chtype attr_norm,
chtype attr_alt1, chtype attr_alt2, int maxlines, int maxwidth,
int *restrict widthbuf, int widthbufsize,
const char *restrict format, va_list args)
{
struct argument format_arg[MAXFMTARGS];
struct convspec format_spec[MAXFMTSPECS];
struct convspec *spec;
const wchar_t *wcformat;
wchar_t *orig_wcformat;
wchar_t *outbuf, *orig_outbuf;
chtype *attrbuf, *orig_attrbuf;
wchar_t *fmtbuf;
int count, line, width;
wchar_t *lastspc;
chtype *spcattr;
int widthspc;
chtype curattr;
int saved_errno;
assert(chbuf != NULL);
assert(chbufsize > 0);
assert(chbufsize <= BUFSIZE);
assert(maxlines > 0);
assert(maxwidth > 0);
assert(widthbuf != NULL);
assert(widthbufsize >= maxlines);
assert(format != NULL);
outbuf = orig_outbuf = xmalloc(BUFSIZE * sizeof(wchar_t));
attrbuf = orig_attrbuf = xmalloc(BUFSIZE * sizeof(chtype));
wcformat = orig_wcformat = xmalloc(chbufsize * sizeof(wchar_t));
fmtbuf = xmalloc(BUFSIZE * sizeof(wchar_t));
// Convert format to a wide-character string
xmbstowcs(orig_wcformat, format, BUFSIZE);
if (mkchstr_parse(wcformat, format_arg, format_spec, args) < 0) {
goto error;
}
// Construct the (outbuf, attrbuf) pair of arrays
spec = format_spec;
curattr = attr_norm;
count = BUFSIZE; // Space left in outbuf
line = -1; // Current line number (0 = first)
width = 0; // Width of the current line
lastspc = NULL; // Pointer to last space in line
spcattr = NULL; // Equivalent in attrbuf
widthspc = 0; // Width of line before last space
while (*wcformat != L'\0' && count > 1 && line < maxlines) {
switch (*wcformat) {
case L'^':
// Switch to a different character rendition
if (*++wcformat == L'\0') {
goto error_inval;
} else {
switch (*wcformat) {
case L'^':
if (mkchstr_add(&outbuf, &attrbuf, &count, curattr,
maxlines, maxwidth, &line, &width,
&lastspc, &spcattr, &widthspc, widthbuf,
widthbufsize, &wcformat) < 0) {
goto error;
}
break;
case L'{':
curattr = attr_alt1;
wcformat++;
break;
case L'[':
curattr = attr_alt2;
wcformat++;
break;
case L'}':
case L']':
curattr = attr_norm;
wcformat++;
break;
default:
goto error_inval;
}
}
break;
case L'%':
// Process a conversion specifier
if (*++wcformat == L'\0') {
goto error_inval;
} else if (*wcformat == L'%') {
if (mkchstr_add(&outbuf, &attrbuf, &count, curattr, maxlines,
maxwidth, &line, &width, &lastspc, &spcattr,
&widthspc, widthbuf, widthbufsize, &wcformat)
< 0) {
goto error;
}
} else {
assert(spec->len != 0);
const wchar_t *str;
wint_t wc;
switch (spec->spec) {
case L'c':
// Insert a character (char or wchar_t) into the output
if (spec->flag_long) {
wc = format_arg[spec->arg_num].a.a_wchar;
} else {
wc = btowc(format_arg[spec->arg_num].a.a_char);
}
if (wc == L'\0' || wc == WEOF) {
wc = EILSEQ_REPL_WC;
}
fmtbuf[0] = wc;
fmtbuf[1] = L'\0';
str = fmtbuf;
goto insertstr;
case L'd':
// Insert an integer (int or long int) into the output
if (spec->flag_long) {
if (swprintf(fmtbuf, BUFSIZE, spec->flag_group ?
L"%'ld" : L"%ld",
format_arg[spec->arg_num].a.a_longint) < 0)
goto error;
} else {
if (swprintf(fmtbuf, BUFSIZE, spec->flag_group ?
L"%'d" : L"%d",
format_arg[spec->arg_num].a.a_int) < 0)
goto error;
}
str = fmtbuf;
goto insertstr;
case L'f':
// Insert a floating-point number (double) into the output
if (spec->flag_prec) {
if (swprintf(fmtbuf, BUFSIZE, spec->flag_group ?
L"%'.*f" : L"%.*f", spec->precision,
format_arg[spec->arg_num].a.a_double) < 0)
goto error;
} else {
if (swprintf(fmtbuf, BUFSIZE, spec->flag_group ?
L"%'f" : L"%f",
format_arg[spec->arg_num].a.a_double) < 0)
goto error;
}
str = fmtbuf;
goto insertstr;
case L'N':
// Insert a monetary amount (double) into the output
if (xwcsfmon(fmtbuf, BUFSIZE, spec->flag_nosym ?
"%!n" : "%n",
format_arg[spec->arg_num].a.a_double) < 0) {
goto error;
}
str = fmtbuf;
goto insertstr;
case L's':
// Insert a string (const char * or const wchar_t *)
if (spec->flag_long) {
str = format_arg[spec->arg_num].a.a_wstring;
} else {
const char *p = format_arg[spec->arg_num].a.a_string;
if (p == NULL) {
str = NULL;
} else {
xmbstowcs(fmtbuf, p, BUFSIZE);
str = fmtbuf;
}
}
if (str == NULL) {
str = L"(NULL)"; // As per GNU printf()
}
insertstr:
// Insert the string pointed to by str
while (*str != L'\0' && count > 1 && line < maxlines) {
if (mkchstr_add(&outbuf, &attrbuf, &count, curattr,
maxlines, maxwidth, &line, &width,
&lastspc, &spcattr, &widthspc,
widthbuf, widthbufsize, &str) < 0) {
goto error;
}
}
wcformat += spec->len;
spec++;
break;
default:
assert(spec->spec);
}
}
break;
default:
// Process an ordinary character (including new-line)
if (mkchstr_add(&outbuf, &attrbuf, &count, curattr, maxlines,
maxwidth, &line, &width, &lastspc, &spcattr,
&widthspc, widthbuf, widthbufsize, &wcformat) < 0) {
goto error;
}
}
}
*outbuf = L'\0'; // Terminating NUL character
*attrbuf = 0;
if (line >= 0 && line < maxlines) {
widthbuf[line] = width;
} else if (line >= maxlines) {
line = maxlines - 1;
}
// Convert the (outbuf, attrbuf) pair of arrays to chbuf
mkchstr_conv(chbuf, chbufsize, orig_outbuf, orig_attrbuf);
free(fmtbuf);
free(orig_wcformat);
free(orig_attrbuf);
free(orig_outbuf);
return line + 1;
error_inval:
errno = EINVAL;
error:
saved_errno = errno;
free(fmtbuf);
free(orig_wcformat);
free(orig_attrbuf);
free(orig_outbuf);
errno = saved_errno;
errno_exit(_("mkchstr: '%s'"), format);
}
/***********************************************************************/
// leftch: Print strings in chstr left-aligned
int leftch (WINDOW *win, int y, int x, const chtype *restrict chstr,
int lines, const int *restrict widthbuf)
{
assert(win != NULL);
assert(chstr != NULL);
assert(lines > 0);
assert(widthbuf != NULL);
wmove(win, y, x);
for ( ; *chstr != 0; chstr++) {
if (*chstr == '\n') {
wmove(win, getcury(win) + 1, x);
} else {
waddch(win, *chstr);
}
}
return OK;
}
/***********************************************************************/
// centerch: Print strings in chstr centred in window
int centerch (WINDOW *win, int y, int offset, const chtype *restrict chstr,
int lines, const int *restrict widthbuf)
{
int ln = 0;
assert(win != NULL);
assert(chstr != NULL);
assert(lines > 0);
assert(widthbuf != NULL);
wmove(win, y, (getmaxx(win) - widthbuf[ln]) / 2 + offset);
for ( ; *chstr != 0; chstr++) {
if (*chstr == '\n') {
if (ln++ >= lines) {
return ERR;
} else {
wmove(win, getcury(win) + 1,
(getmaxx(win) - widthbuf[ln]) / 2 + offset);
}
} else {
waddch(win, *chstr);
}
}
return OK;
}
/***********************************************************************/
// rightch: Print strings in chstr right-aligned
int rightch (WINDOW *win, int y, int x, const chtype *restrict chstr,
int lines, const int *restrict widthbuf)
{
int ln = 0;
assert(win != NULL);
assert(chstr != NULL);
assert(lines > 0);
assert(widthbuf != NULL);
wmove(win, y, x - widthbuf[ln]);
for ( ; *chstr != 0; chstr++) {
if (*chstr == '\n') {
if (ln++ >= lines) {
return ERR;
} else {
wmove(win, getcury(win) + 1, x - widthbuf[ln]);
}
} else {
waddch(win, *chstr);
}
}
return OK;
}
/***********************************************************************/
// left: Print strings left-aligned
int left (WINDOW *win, int y, int x, chtype attr_norm, chtype attr_alt1,
chtype attr_alt2, int maxlines, const char *restrict format, ...)
{
va_list args;
chtype *chbuf;
int *widthbuf;
int lines;
int ret;
assert(maxlines > 0);
chbuf = xmalloc(BUFSIZE * sizeof(chtype));
widthbuf = xmalloc(maxlines * sizeof(int));
va_start(args, format);
lines = vmkchstr(chbuf, BUFSIZE, attr_norm, attr_alt1, attr_alt2, maxlines,
getmaxx(win) - x - 2, widthbuf, maxlines, format, args);
ret = leftch(win, y, x, chbuf, lines, widthbuf);
assert(ret == OK);
va_end(args);
free(widthbuf);
free(chbuf);
return lines;
}
/***********************************************************************/
// center: Print strings centred in window
int center (WINDOW *win, int y, int offset, chtype attr_norm, chtype attr_alt1,
chtype attr_alt2, int maxlines, const char *restrict format, ...)
{
va_list args;
chtype *chbuf;
int *widthbuf;
int lines;
int ret;
assert(maxlines > 0);
chbuf = xmalloc(BUFSIZE * sizeof(chtype));
widthbuf = xmalloc(maxlines * sizeof(int));
va_start(args, format);
lines = vmkchstr(chbuf, BUFSIZE, attr_norm, attr_alt1, attr_alt2, maxlines,
getmaxx(win) - 4, widthbuf, maxlines, format, args);
ret = centerch(win, y, offset, chbuf, lines, widthbuf);
assert(ret == OK);
va_end(args);
free(widthbuf);
free(chbuf);
return lines;
}
/***********************************************************************/
// right: Print strings right-aligned
int right (WINDOW *win, int y, int x, chtype attr_norm, chtype attr_alt1,
chtype attr_alt2, int maxlines, const char *restrict format, ...)
{
va_list args;
chtype *chbuf;
int *widthbuf;
int lines;
int ret;
assert(maxlines > 0);
chbuf = xmalloc(BUFSIZE * sizeof(chtype));
widthbuf = xmalloc(maxlines * sizeof(int));
va_start(args, format);
lines = vmkchstr(chbuf, BUFSIZE, attr_norm, attr_alt1, attr_alt2, maxlines,
x - 2, widthbuf, maxlines, format, args);
ret = rightch(win, y, x, chbuf, lines, widthbuf);
assert(ret == OK);
va_end(args);
free(widthbuf);
free(chbuf);
return lines;
}
/***********************************************************************/
// getwch: Get a wide character from the keyboard
/* There are two implementations of getwch(): one used if enhanced Curses
is present (with wide-character functions), the other if only
single-byte functions are available. */
#if defined(HAVE_CURSES_ENHANCED) || defined(HAVE_NCURSESW)
int getwch (WINDOW *win, wint_t *restrict wch)
{
int ret = wget_wch(win, wch);
if (ret == OK) {
int c = wctob(*wch);
if ((c >= 0 && c < ' ') || c == 0x7F) {
/* Make control characters (and DEL) appear to be similar to
function keys. This assumes the KEY_xxx definitions do
not overlap, which is true of all Curses implementations
(due to the same codes being returned by getch()). We do
not use iswcntrl() as certain additional Unicode
characters are also control characters (eg, U+2028) */
*wch = (wint_t) c;
ret = KEY_CODE_YES;
}
}
return ret;
}
#else // !defined(HAVE_CURSES_ENHANCED) && !defined(HAVE_NCURSESW)
int getwch (WINDOW *win, wint_t *restrict wch)
{
static mbstate_t *mbstate; // Current shift state
char buf[MB_LEN_MAX * 8]; // Allow space for redundant shifts
mbstate_t mbcopy;
int len, ret;
wchar_t val = 0;
if (mbstate == NULL) {
mbstate = xmalloc(sizeof(mbstate_t));
memset(mbstate, 0, sizeof(mbstate_t));
}
len = 0;
while (true) {
ret = wgetch(win);
if (ret == ERR) {
break;
} else if (ret >= 0400) {
// Assume any non-ASCII result is a function key
if (len > 0) {
// Function key is interrupting an incomplete multibyte char!
ungetch(ret);
ret = ERR;
} else {
val = ret;
ret = KEY_CODE_YES;
}
break;
} else if (len >= sizeof(buf) - 1) {
// Too many characters
ungetch(ret);
ret = ERR;
break;
} else {
buf[len++] = ret;
// Do we have a complete multibyte keypress?
memcpy(&mbcopy, mbstate, sizeof(mbstate_t));
size_t n = mbrtowc(&val, buf, len, &mbcopy);
if (n == (size_t) -1) {
// Invalid character
ungetch(ret);
ret = ERR;
break;
} else if (n == (size_t) -2) {
// Incomplete sequence: wait for more bytes to come
;
} else {
// A valid multibyte sequence
memcpy(mbstate, &mbcopy, sizeof(mbstate_t));
int c = wctob(val);
if ((c >= 0 && c < ' ') || c == 0x7F) {
/* Make control characters (and DEL) appear to be
similar to function keys. */
val = (wchar_t) c;
ret = KEY_CODE_YES;
} else {
// An ordinary key
ret = OK;
}
break;
}
}
}
if (wch != NULL) {
*wch = val;
}
return ret;
}
#endif // !defined(HAVE_CURSES_ENHANCED) && !defined(HAVE_NCURSESW)
/***********************************************************************/
// gettxchar: Read a character from the keyboard
int gettxchar (WINDOW *win, wint_t *restrict wch)
{
int ret;
assert(win != NULL);
assert(wch != NULL);
keypad(win, true);
meta(win, true);
wtimeout(win, -1);
while (true) {
ret = getwch(win, wch);
if (ret == OK) {
break;
} else if (ret == KEY_CODE_YES) {
#ifdef HANDLE_RESIZE_EVENTS
if (*wch == KEY_RESIZE) {
txresize();
} else {
break;
}
#else // ! HANDLE_RESIZE_EVENTS
break;
#endif // ! HANDLE_RESIZE_EVENTS
} else {
// ret == ERR
beep();
}
}
return ret;
}
/***********************************************************************/
// cpos_end: Adjust cpos and st for printing the ending part of buf
void cpos_end (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int clen, int width, int len)
{
*cpos = MIN(clen, width - 1);
if (clen <= width - 1) {
// Whole string can be displayed
*st = 0;
} else {
// String too long: figure out offset from which to print (value of st)
int i = width - 1;
*st = len;
while (i > 0) {
i -= wcwidth(buf[--(*st)]);
}
if (i < 0) {
/* Don't truncate a double-width character if the second half
would appear in the first column position. */
i += wcwidth(buf[(*st)++]);
while (wcwidth(buf[*st]) == 0) {
// Skip over zero-width characters (mostly combining ones)
(*st)++;
}
*cpos -= i;
}
}
assert(*st >= 0);
}
/***********************************************************************/
// cpos_dec: Adjust cpos and st: scroll to the left by w columns
void cpos_dec (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int w, int width __attribute__((unused)))
{
if (*cpos - w >= 0) {
// Cursor position is not yet in first column
*cpos -= w;
} else if (*st > 0) {
(*st)--;
if (w == 0) {
/* Make sure zero-width characters (esp. combining ones) do
not appear without the associated base character */
w = wcwidth(buf[*st]);
while (*st > 0 && w == 0) {
w = wcwidth(buf[--(*st)]);
}
*cpos = w;
}
}
}
/***********************************************************************/
// cpos_inc: Adjust cpos and st: scroll to the right by w columns
void cpos_inc (const wchar_t *restrict buf, int *restrict cpos,
int *restrict st, int w, int width)
{
if (*cpos + w <= width - 1) {
// Cursor position is not yet in second-last column
*cpos += w;
} else {
int i = 0;
while (i < w) {
i += wcwidth(buf[(*st)++]);
}
while (wcwidth(buf[*st]) == 0) {
// Skip over zero-width characters (mainly combining ones)
(*st)++;
}
if (i > w) {
// Take double-width characters into account
*cpos -= i - w;
}
}
}
/***********************************************************************/
// gettxline: Read a line of input from the keyboard (low-level)
int gettxline (WINDOW *win, wchar_t *restrict buf, int bufsize,
bool *restrict modified, bool multifield,
const wchar_t *emptyval, const wchar_t *defaultval,
const wchar_t *allowed, bool stripspc, int y, int x,
int width, chtype attr)
{
wchar_t *keycode_defval;
bool done, redraw, mod;
int len, pos, st;
int clen, cpos;
int rcode, ret;
wint_t key;
chtype oldattr;
chtype *chbuf;
int chbufwidth;
assert(win != NULL);
assert(buf != NULL);
assert(bufsize > 2);
assert(width > 2);
chbuf = xmalloc(BUFSIZE * sizeof(chtype));
keycode_defval = xmalloc(BUFSIZE * sizeof(wchar_t));
/* TRANSLATORS: This string specifies the keycodes used to insert the
default value into the input string, if entered as the very first
character. Ideally, it should contain an easily-accessible
keycode that would NOT be used in ordinary input. Digits, ".",
",", "+" and "-" are definitely NOT acceptable. */
xmbstowcs(keycode_defval, pgettext("input|DefaultValue", "=;"), BUFSIZE);
keypad(win, true);
meta(win, true);
wtimeout(win, -1);
oldattr = getattrs(win);
curs_set(CURS_ON);
len = wcslen(buf); // len is number of wide chars in buf
pos = len; // pos (string position): 0 to len
clen = wcswidth(buf, bufsize); // clen is number of column positions
if (clen < 0) {
err_exit(_("gettxline: illegal character in string: '%ls'"), buf);
}
/* Find the point from which buf should be displayed to screen. cpos
is the cursor position (0 to width-1), st is the offset in buf[]
from which to start printing the string on the screen. */
cpos_end(buf, &cpos, &st, clen, width, len);
redraw = true;
done = false;
mod = false;
ret = OK;
while (! done) {
if (redraw) {
/* Redisplay the visible part of the current input string.
Blanks at the end of the input area are replaced with
"attr", which may contain a '_' for non-colour mode. */
mvwhline(win, y, x, ((attr & A_CHARTEXT) == 0) ?
' ' | attr : attr, width);
mkchstr(chbuf, BUFSIZE, attr & ~A_CHARTEXT, 0, 0, 1, width,
&chbufwidth, 1, "%ls", buf + st);
leftch(win, y, x, chbuf, 1, &chbufwidth);
wmove(win, y, x + cpos);
wrefresh(win);
}
rcode = getwch(win, &key);
if (rcode == OK) {
// Ordinary wide character
if (defaultval != NULL && len == 0
&& wcschr(keycode_defval, key) != NULL) {
// Initialise buffer with the default value
wcsncpy(buf, defaultval, bufsize - 1);
buf[bufsize - 1] = L'\0';
len = wcslen(buf);
pos = len;
clen = wcswidth(buf, bufsize);
if (clen == -1) {
err_exit(_("gettxline: illegal character in string: '%ls'"),
buf);
}
cpos_end(buf, &cpos, &st, clen, width, len);
mod = true;
redraw = true;
} else if (len >= bufsize - 1
|| (allowed != NULL && wcschr(allowed, key) == NULL)) {
beep();
} else {
// Process an ordinary character: insert it into the string
int w = wcwidth(key);
if (w < 0) {
// Non-printing character
beep();
} else {
wmemmove(buf + pos + 1, buf + pos, len - pos + 1);
buf[pos] = (wchar_t) key;
len++;
pos++;
clen += w;
cpos_inc(buf, &cpos, &st, w, width);
mod = true;
redraw = true;
}
}
} else if (rcode == KEY_CODE_YES) {
// Function or control key
switch (key) {
// Terminating keys
case KEY_RETURN:
case KEY_ENTER:
case KEY_CTRL('M'):
// Finish entering the string
if (stripspc) {
int i;
// Strip leading spaces
for (i = 0; i < len && iswspace(buf[i]); i++)
;
if (i > 0) {
wmemmove(buf, buf + i, len - i + 1);
len -= i;
mod = true;
}
// Strip trailing spaces
for (i = len; i > 0 && iswspace(buf[i - 1]); i--)
;
if (i < len) {
buf[i] = L'\0';
len = i;
mod = true;
}
}
if (emptyval != NULL && len == 0) {
wcsncpy(buf, emptyval, bufsize - 1);
buf[bufsize - 1] = L'\0';
mod = true;
}
ret = OK;
done = true;
break;
case KEY_CANCEL:
case KEY_EXIT:
case KEY_CTRL('C'):
case KEY_CTRL('G'):
case KEY_CTRL('\\'):
// Cancel entering the string
ret = ERR;
done = true;
break;
case KEY_UP:
case KEY_BTAB:
case KEY_CTRL('P'):
// Finish entering the string, if multifield is true
if (multifield) {
ret = KEY_UP;
done = true;
} else {
beep();
}
break;
case KEY_DOWN:
case KEY_TAB:
case KEY_CTRL('N'):
// Finish entering the string, if multifield is true
if (multifield) {
ret = KEY_DOWN;
done = true;
} else {
beep();
}
break;
// Cursor movement keys
case KEY_LEFT:
case KEY_CTRL('B'):
// Move cursor back one character
if (pos == 0) {
beep();
} else {
pos--;
cpos_dec(buf, &cpos, &st, wcwidth(buf[pos]), width);
redraw = true;
}
break;
case KEY_RIGHT:
case KEY_CTRL('F'):
// Move cursor forward one character
if (pos == len) {
beep();
} else {
pos++;
cpos_inc(buf, &cpos, &st, wcwidth(buf[pos - 1]), width);
redraw = true;
}
break;
case KEY_HOME:
case KEY_CTRL('A'):
// Move cursor to start of string
pos = 0;
cpos = 0;
st = 0;
redraw = true;
break;
case KEY_END:
case KEY_CTRL('E'):
// Move cursor to end of string
pos = len;
cpos_end(buf, &cpos, &st, clen, width, len);
redraw = true;
break;
case KEY_CLEFT:
// Move cursor to start of current or previous word
while (pos > 0 && ! iswalnum(buf[pos - 1])) {
pos--;
cpos_dec(buf, &cpos, &st, wcwidth(buf[pos]), width);
}
while (pos > 0 && (iswalnum(buf[pos - 1])
|| (pos > 1 && wcwidth(buf[pos - 1]) == 0
&& iswalnum(buf[pos - 2])))) {
/* Treat zero-width characters preceded by an
alphanumeric character as alphanumeric. */
pos--;
cpos_dec(buf, &cpos, &st, wcwidth(buf[pos]), width);
}
redraw = true;
break;
case KEY_CRIGHT:
// Move cursor to end of current or next word
while (pos < len && ! iswalnum(buf[pos])) {
pos++;
cpos_inc(buf, &cpos, &st, wcwidth(buf[pos - 1]), width);
}
while (pos < len
&& (iswalnum(buf[pos]) || wcwidth(buf[pos]) == 0)) {
/* Treat zero-width characters following an
alphanumeric character as alphanumeric. */
pos++;
cpos_inc(buf, &cpos, &st, wcwidth(buf[pos - 1]), width);
}
redraw = true;
break;
// Deletion keys
case KEY_BS:
case KEY_BACKSPACE:
case KEY_DEL:
// Delete previous character
if (pos == 0) {
beep();
} else {
int w = wcwidth(buf[pos - 1]);
wmemmove(buf + pos - 1, buf + pos, len - pos + 1);
len--;
pos--;
clen -= w;
cpos_dec(buf, &cpos, &st, w, width);
mod = true;
redraw = true;
}
break;
case KEY_DC:
case KEY_CTRL('D'):
// Delete character under cursor
if (pos == len) {
beep();
} else {
int w = wcwidth(buf[pos]);
wmemmove(buf + pos, buf + pos + 1, len - pos);
len--;
clen -= w;
// pos, cpos and st stay the same
mod = true;
redraw = true;
}
break;
case KEY_CLEAR:
// Delete the entire line
wcscpy(buf, L"");
len = 0;
pos = 0;
clen = 0;
cpos = 0;
st = 0;
mod = true;
redraw = true;
break;
case KEY_CTRL('U'):
// Delete backwards to the start of the line
if (pos == 0) {
beep();
} else {
int i, ww;
for (i = 0, ww = 0; i < pos; i++) {
ww += wcwidth(buf[i]);
}
wmemmove(buf, buf + pos, len - pos + 1);
len -= pos;
pos = 0;
clen -= ww;
cpos = 0;
st = 0;
mod = true;
redraw = true;
}
break;
case KEY_CTRL('K'):
// Delete to the end of the line
if (pos == len) {
beep();
} else {
int i, ww;
for (i = pos, ww = 0; i < len; i++) {
ww += wcwidth(buf[i]);
}
buf[pos] = L'\0';
len = pos;
clen -= ww;
// pos, cpos and st stay the same
mod = true;
redraw = true;
}
break;
case KEY_CTRL('W'):
// Delete the previous word
if (pos == 0) {
beep();
} else {
/* Note the use of iswspace() instead of iswalnum():
this makes ^W follow GNU Bash standards, which
behaves differently from Meta-DEL. */
int i = pos;
int ww = 0;
while (i > 0 && iswspace(buf[i - 1])) {
i--;
int w = wcwidth(buf[i]);
ww += w;
cpos_dec(buf, &cpos, &st, w, width);
}
while (i > 0 && ! iswspace(buf[i - 1])) {
i--;
int w = wcwidth(buf[i]);
ww += w;
cpos_dec(buf, &cpos, &st, w, width);
}
wmemmove(buf + i, buf + pos, len - pos + 1);
len -= pos - i;
pos = i;
clen -= ww;
mod = true;
redraw = true;
}
break;
// Miscellaneous keys and events
case KEY_CTRL('T'):
// Transpose characters
if (pos == 0 || len <= 1) {
beep();
} else if (pos == len) {
wchar_t c = buf[pos - 1];
buf[pos - 1] = buf[pos - 2];
buf[pos - 2] = c;
// pos, cpos and st stay the same
mod = true;
redraw = true;
} else {
wchar_t c = buf[pos];
int w = wcwidth(c);
buf[pos] = buf[pos - 1];
buf[pos - 1] = c;
pos++;
cpos_inc(buf, &cpos, &st, w, width);
mod = true;
redraw = true;
}
break;
case KEY_ESC:
// Handle Meta-X-style and other function key presses
wtimeout(win, META_TIMEOUT);
rcode = getwch(win, &key);
if (rcode == OK) {
// Ordinary wide character
// Swallow any unknown VT100-style function keys
if (key == L'O' || key == L'[') {
rcode = getwch(win, &key);
while (rcode == OK
&& wcschr(L"0123456789;", key) != NULL
&& wcschr(L"~ABCDEFGHIJKLMNOPQRSTUVWXYZ"
L"abcdefghijklmnopqrstuvwxyz", key)
== NULL) {
rcode = getwch(win, &key);
}
beep();
} else {
// Handle Meta-X-style keypress
switch (key) {
// Cursor movement keys
case L'B':
case L'b':
// Move cursor to start of current or previous word
while (pos > 0 && ! iswalnum(buf[pos - 1])) {
pos--;
cpos_dec(buf, &cpos, &st, wcwidth(buf[pos]),
width);
}
while (pos > 0 && (iswalnum(buf[pos - 1])
|| (pos > 1 && wcwidth(buf[pos - 1]) == 0
&& iswalnum(buf[pos - 2])))) {
/* Treat zero-width characters preceded by an
alphanumeric character as alphanumeric. */
pos--;
cpos_dec(buf, &cpos, &st, wcwidth(buf[pos]),
width);
}
redraw = true;
break;
case L'F':
case L'f':
// Move cursor to end of current or next word
while (pos < len && ! iswalnum(buf[pos])) {
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
while (pos < len && (iswalnum(buf[pos])
|| wcwidth(buf[pos]) == 0)) {
/* Treat zero-width characters following an
alphanumeric character as alphanumeric. */
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
redraw = true;
break;
// Deletion keys
case L'D':
case L'd':
// Delete the next word
{
int i = pos;
int ww = 0;
while (i < len && ! iswalnum(buf[i])) {
i++;
ww += wcwidth(buf[i - 1]);
}
while (i < len && (iswalnum(buf[i])
|| wcwidth(buf[pos]) == 0)) {
/* Treat zero-width characters following
an alphanumeric character as
alphanumeric. */
i++;
ww += wcwidth(buf[i - 1]);
}
wmemmove(buf + pos, buf + i, len - i + 1);
len -= (i - pos);
clen -= ww;
// pos, cpos and st stay the same
mod = true;
redraw = true;
}
break;
case L'\\':
case L' ':
// Delete all surrounding spaces; if key == L' ',
// also insert one space
{
int i = pos;
int ww = 0;
while (pos > 0 && iswspace(buf[pos - 1])) {
pos--;
int w = wcwidth(buf[pos]);
ww += w;
cpos_dec(buf, &cpos, &st, w, width);
}
while (i < len && iswspace(buf[i])) {
i++;
ww += wcwidth(buf[i - 1]);
}
wmemmove(buf + pos, buf + i, len - i + 1);
len -= (i - pos);
clen -= ww;
if (key == L' ') {
if (len >= bufsize - 1 || (allowed != NULL
&& wcschr(allowed, key) == NULL)) {
beep();
} else {
wchar_t c = L' ';
wmemmove(buf + pos + 1, buf + pos,
len - pos + 1);
buf[pos] = c;
len++;
pos++;
int w = wcwidth(c);
clen += w;
cpos_inc(buf, &cpos, &st, w, width);
}
}
mod = true;
redraw = true;
}
break;
// Transformation keys
case L'U':
case L'u':
// Convert word (from cursor onwards) to upper case
while (pos < len && ! iswalnum(buf[pos])) {
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
while (pos < len && (iswalnum(buf[pos])
|| wcwidth(buf[pos]) == 0)) {
buf[pos] = towupper(buf[pos]);
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
mod = true;
redraw = true;
break;
case L'L':
case L'l':
// Convert word (from cursor onwards) to lower case
while (pos < len && ! iswalnum(buf[pos])) {
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
while (pos < len && (iswalnum(buf[pos])
|| wcwidth(buf[pos]) == 0)) {
buf[pos] = towlower(buf[pos]);
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
mod = true;
redraw = true;
break;
case L'C':
case L'c':
// Convert current letter to upper case,
// following letters to lower case
{
while (pos < len && ! iswalnum(buf[pos])) {
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
bool first = true;
while (pos < len && (iswalnum(buf[pos])
|| wcwidth(buf[pos]) == 0)) {
if (first) {
buf[pos] = towupper(buf[pos]);
first = false;
} else {
buf[pos] = towlower(buf[pos]);
}
pos++;
cpos_inc(buf, &cpos, &st,
wcwidth(buf[pos - 1]), width);
}
mod = true;
redraw = true;
}
break;
default:
beep();
}
}
} else if (rcode == KEY_CODE_YES) {
// Function or control key (with preceding Meta key)
switch (key) {
// Deletion keys
case KEY_BS:
case KEY_BACKSPACE:
case KEY_DEL:
// Delete the previous word (different from ^W)
{
int ww = 0;
int i = pos;
while (i > 0 && ! iswalnum(buf[i - 1])) {
i--;
int w = wcwidth(buf[i]);
ww += w;
cpos_dec(buf, &cpos, &st, w, width);
}
while (i > 0 && (iswalnum(buf[i - 1])
|| (i > 1 && wcwidth(buf[i - 1]) == 0
&& iswalnum(buf[i - 2])))) {
/* Treat zero-width characters preceded by an
alphanumeric character as alphanumeric. */
i--;
int w = wcwidth(buf[i]);
ww += w;
cpos_dec(buf, &cpos, &st, w, width);
}
wmemmove(buf + i, buf + pos, len - pos + 1);
len -= (pos - i);
pos = i;
clen -= ww;
mod = true;
redraw = true;
}
break;
// Miscellaneous keys and events
#ifdef HANDLE_RESIZE_EVENTS
case KEY_RESIZE:
txresize();
break;
#endif // HANDLE_RESIZE_EVENTS
default:
beep();
}
} else {
/* rcode == ERR (timeout): <ESC> by itself, so cancel
entering the string. */
ret = ERR;
done = true;
}
wtimeout(win, -1);
break;
#ifdef HANDLE_RESIZE_EVENTS
case KEY_RESIZE:
txresize();
break;
#endif // HANDLE_RESIZE_EVENTS
default:
beep();
}
} else {
// rcode == ERR: Do nothing
;
}
}
curs_set(CURS_OFF);
mvwhline(win, y, x, ' ' | oldattr, width);
mkchstr(chbuf, BUFSIZE, oldattr | A_BOLD, 0, 0, 1, width,
&chbufwidth, 1, "%ls", buf);
leftch(win, y, x, chbuf, 1, &chbufwidth);
wrefresh(win);
if (modified != NULL) {
*modified = mod;
}
free(chbuf);
free(keycode_defval);
return ret;
}
/***********************************************************************/
// gettxstr: Read a string from the keyboard
int gettxstr (WINDOW *win, wchar_t *restrict *restrict bufptr,
bool *restrict modified, bool multifield, int y, int x,
int width, chtype attr)
{
assert(bufptr != NULL);
// Allocate the result buffer if needed
if (*bufptr == NULL) {
*bufptr = xmalloc(BUFSIZE * sizeof(wchar_t));
**bufptr = L'\0';
}
return gettxline(win, *bufptr, BUFSIZE, modified, multifield, L"", L"",
NULL, true, y, x, width, attr);
}
/***********************************************************************/
// txinput_fixup: Copy strings with fixup
void txinput_fixup (wchar_t *restrict dest, const wchar_t *restrict src,
bool isfloat)
{
assert(src != NULL);
assert(dest != NULL);
wcsncpy(dest, src, BUFSIZE - 1);
dest[BUFSIZE - 1] = L'\0';
// Replace mon_decimal_point with decimal_point if these are different
if (isfloat) {
if (*mon_decimal_point != L'\0' && *decimal_point != L'\0'
&& wcscmp(mon_decimal_point, decimal_point) != 0) {
int len_dp = wcslen(decimal_point);
int len_mdp = wcslen(mon_decimal_point);
wchar_t *p;
while ((p = wcsstr(dest, mon_decimal_point)) != NULL) {
// Make space for decimal_point, if needed
if (len_mdp != len_dp) {
wmemmove(p + len_dp, p + len_mdp,
wcslen(p) - (len_dp - len_mdp) + 1);
}
// Copy decimal_point over p WITHOUT copying ending NUL
for (wchar_t *pn = decimal_point; *pn != L'\0'; pn++, p++) {
*p = *pn;
}
}
}
}
// Remove thousands separators if required
if (*thousands_sep != L'\0') {
int len = wcslen(thousands_sep);
wchar_t *p;
while ((p = wcsstr(dest, thousands_sep)) != NULL) {
wmemmove(p, p + len, wcslen(p) - len + 1);
}
}
if (*mon_thousands_sep != L'\0') {
int len = wcslen(mon_thousands_sep);
wchar_t *p;
while ((p = wcsstr(dest, mon_thousands_sep)) != NULL) {
wmemmove(p, p + len, wcslen(p) - len + 1);
}
}
}
/***********************************************************************/
// gettxdouble: Read a floating-point number from the keyboard
int gettxdouble (WINDOW *win, double *restrict result, double min,
double max, double emptyval, double defaultval,
int y, int x, int width, chtype attr)
{
struct lconv *lc = &lconvinfo;
wchar_t *buf, *bufcopy;
wchar_t *allowed, *emptystr, *defaultstr;
double val;
bool done;
int ret;
assert(result != NULL);
assert(min <= max);
buf = xmalloc(BUFSIZE * sizeof(wchar_t));
bufcopy = xmalloc(BUFSIZE * sizeof(wchar_t));
allowed = xmalloc(BUFSIZE * sizeof(wchar_t));
emptystr = xmalloc(BUFSIZE * sizeof(wchar_t));
defaultstr = xmalloc(BUFSIZE * sizeof(wchar_t));
*buf = L'\0';
wcscpy(allowed, L"0123456789+-Ee");
wcsncat(allowed, decimal_point, BUFSIZE - wcslen(allowed) - 1);
wcsncat(allowed, thousands_sep, BUFSIZE - wcslen(allowed) - 1);
wcsncat(allowed, mon_decimal_point, BUFSIZE - wcslen(allowed) - 1);
wcsncat(allowed, mon_thousands_sep, BUFSIZE - wcslen(allowed) - 1);
swprintf(emptystr, BUFSIZE, L"%'1.*f", lc->frac_digits, emptyval);
swprintf(defaultstr, BUFSIZE, L"%'1.*f", lc->frac_digits, defaultval);
done = false;
while (! done) {
ret = gettxline(win, buf, BUFSIZE, NULL, false, emptystr, defaultstr,
allowed, true, y, x, width, attr);
if (ret == OK) {
wchar_t *p;
txinput_fixup(bufcopy, buf, true);
val = wcstod(bufcopy, &p);
if (*p == L'\0' && val >= min && val <= max) {
*result = val;
done = true;
} else {
beep();
}
} else {
done = true;
}
}
free(defaultstr);
free(emptystr);
free(allowed);
free(bufcopy);
free(buf);
return ret;
}
/***********************************************************************/
// gettxlong: Read an integer number from the keyboard
int gettxlong (WINDOW *win, long int *restrict result, long int min,
long int max, long int emptyval, long int defaultval,
int y, int x, int width, chtype attr)
{
wchar_t *buf, *bufcopy;
wchar_t *allowed, *emptystr, *defaultstr;
long int val;
bool done;
int ret;
assert(result != NULL);
assert(min <= max);
buf = xmalloc(BUFSIZE * sizeof(wchar_t));
bufcopy = xmalloc(BUFSIZE * sizeof(wchar_t));
allowed = xmalloc(BUFSIZE * sizeof(wchar_t));
emptystr = xmalloc(BUFSIZE * sizeof(wchar_t));
defaultstr = xmalloc(BUFSIZE * sizeof(wchar_t));
*buf = L'\0';
wcscpy(allowed, L"0123456789+-");
wcsncat(allowed, thousands_sep, BUFSIZE - wcslen(allowed) - 1);
wcsncat(allowed, mon_thousands_sep, BUFSIZE - wcslen(allowed) - 1);
swprintf(emptystr, BUFSIZE, L"%'1ld", emptyval);
swprintf(defaultstr, BUFSIZE, L"%'1ld", defaultval);
done = false;
while (! done) {
ret = gettxline(win, buf, BUFSIZE, NULL, false, emptystr, defaultstr,
allowed, true, y, x, width, attr);
if (ret == OK) {
wchar_t *p;
txinput_fixup(bufcopy, buf, false);
val = wcstol(bufcopy, &p, 10);
if (*p == L'\0' && val >= min && val <= max) {
*result = val;
done = true;
} else {
beep();
}
} else {
done = true;
}
}
free(defaultstr);
free(emptystr);
free(allowed);
free(bufcopy);
free(buf);
return ret;
}
/***********************************************************************/
// answer_yesno: Wait for a Yes/No answer
bool answer_yesno (WINDOW *win)
{
static wchar_t *keycode_yes;
static wchar_t *keycode_no;
bool ret;
chtype oldattr = getattrs(win);
chtype oldbkgd = getbkgd(win);
if (keycode_yes == NULL) {
wchar_t *buf = xmalloc(BUFSIZE * sizeof(wchar_t));
/* TRANSLATORS: The strings with msgctxt "input|Yes" and
"input|No" contain the keycodes used to determine whether a
user is answering "Yes" or "No" in response to some question.
Both upper and lower-case versions should be present. */
xmbstowcs(buf, pgettext("input|Yes", "Yy"), BUFSIZE);
keycode_yes = xwcsdup(buf);
xmbstowcs(buf, pgettext("input|No", "Nn"), BUFSIZE);
keycode_no = xwcsdup(buf);
free(buf);
}
keypad(win, true);
meta(win, true);
wtimeout(win, -1);
curs_set(CURS_ON);
while (true) {
wint_t key;
int r = getwch(win, &key);
if (r == OK) {
if (wcschr(keycode_yes, key) != NULL) {
ret = true;
break;
} else if (wcschr(keycode_no, key) != NULL) {
ret = false;
break;
} else {
beep();
}
} else if (r == KEY_CODE_YES) {
#ifdef HANDLE_RESIZE_EVENTS
if (key == KEY_RESIZE) {
txresize();
} else {
beep();
}
#else // ! HANDLE_RESIZE_EVENTS
beep();
#endif // ! HANDLE_RESIZE_EVENTS
} else {
beep();
}
}
curs_set(CURS_OFF);
wattron(win, A_BOLD);
if (ret) {
/* TRANSLATORS: The strings "Yes" and "No" are printed as a
response to user input in answer to questions like "Are you
sure? [Y/N] " */
waddstr(win, pgettext("answer", "Yes"));
} else {
waddstr(win, pgettext("answer", "No"));
}
wbkgdset(win, oldbkgd);
wattrset(win, oldattr);
wrefresh(win);
return ret;
}
/***********************************************************************/
// wait_for_key: Print a message and wait for any key
void wait_for_key (WINDOW *win, int y, chtype attr)
{
wint_t key;
int r;
keypad(win, true);
meta(win, true);
wtimeout(win, -1);
center(curwin, y, 0, attr, 0, 0, 1,
/* TRANSLATORS: The reason the user is not asked "Press any
key to continue" is historical: many, many people used to
ask "where is the <ANY> key?" :-) */
_("[ Press <SPACE> to continue ] "));
wrefresh(win);
while (true) {
r = getwch(win, &key);
if (r == OK) {
break;
} else if (r == KEY_CODE_YES) {
#ifdef HANDLE_RESIZE_EVENTS
if (key == KEY_RESIZE) {
txresize();
} else {
break;
}
#else // ! HANDLE_RESIZE_EVENTS
break;
#endif // ! HANDLE_RESIZE_EVENTS
} else {
beep();
}
}
}
/***********************************************************************/
// End of file
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