https://invisible-island.net/ncurses/man/
curs_inchstr(3x) Library calls curs_inchstr(3x)
inchstr, inchnstr, winchstr, winchnstr, mvinchstr, mvinchnstr,
mvwinchstr, mvwinchnstr - get a curses character string from a window
#include <curses.h>
int inchstr(chtype *chstr);
int inchnstr(chtype *chstr, int n);
int winchstr(WINDOW *win, chtype *chstr);
int winchnstr(WINDOW *win, chtype *chstr, int n);
int mvinchstr(int y, int x, chtype *chstr);
int mvinchnstr(int y, int x, chtype *chstr, int n);
int mvwinchstr(WINDOW *win, int y, int x, chtype *chstr);
int mvwinchnstr(WINDOW *win, int y, int x, chtype *chstr, int n);
These routines return a NULL-terminated array of chtype quantities,
starting at the current cursor position in the named window and ending
at the right margin of the window.
The four functions with n as the last argument, return a leading
substring at most n characters long (exclusive of the trailing
(chtype)0). Transfer stops at the end of the current line, or when n
characters have been stored at the location referenced by chstr.
Constants defined in <curses.h> can be used with the & (logical "and")
operator to extract the character or the attribute alone from any
position in the chstr [see curs_inch(3x)].
All routines return the integer ERR upon failure and an integer value
other than ERR upon successful completion (the number of characters
retrieved, exclusive of the trailing 0).
X/Open Curses defines no error conditions. This implementation returns
ERR
o if the win parameter is null or
o if the chstr parameter is null.
Functions prefixed with "mv" first perform cursor movement and fail if
the position (y, x) is outside the window boundaries.
All of these functions except winchnstr may be implemented as macros.
Reading a line that overflows the array pointed to by chstr with
inchstr, mvinchstr, mvwinchstr or winchstr causes undefined results.
Therefore, the use of inchnstr, mvinchnstr, mvwinchnstr, or winchnstr
is recommended.
X/Open Curses Issue 4 describes these functions. It specifies no error
conditions for them. It characterizes the strings stored by these
functions as containing "at most n elements" from a window, but does
not specify whether the string stored by these functions is null-
terminated.
SVr4 does not document whether it null-terminates the string it stores
in chstr, and does not document whether a trailing null character
counts toward the length limit n.
SVr4 describes a successful return value only as "an integer value
other than ERR".
curses(3x), curs_inch(3x), curs_inwstr(3x), curs_in_wchstr(3x)
ncurses 6.5 2025-02-15 curs_inchstr(3x)