curses_inch(3) - NetBSD Manual Pages

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CURSES_INCH(3)          NetBSD Library Functions Manual         CURSES_INCH(3)


NAME

     curses_inch, inch, winch, inchnstr, mvinchnstr, winchnstr, mvwinchnstr,
     inchstr, mvinchstr, winchstr, mvwinchstr, innstr, winnstr, mvinnstr,
     mvwinnstr, instr, winstr, mvinstr, mvwinstr -- curses read screen con-
     tents routines


LIBRARY

     Curses Library (libcurses, -lcurses)


SYNOPSIS

     #include <curses.h>

     chtype
     inch(void);

     chtype
     winch(WINDOW *win);

     int
     inchnstr(chtype *chars, int n);

     int
     mvinchnstr(int y, int x, chtype *chstr, int n);

     int
     winchnstr(WINDOW *win, chtype *chars, int n);

     int
     mvwinchnstr(WINDOW *win, int y, int x, chtype *chstr, int n);

     int
     inchstr(chtype *chars);

     int
     mvinchstr(int y, int x, chtype *chstr);

     int
     winchstr(WINDOW *win, chtype *chars);

     int

     mvwinchstr WINDOW *win int y int x chtype *chstr

     int
     innstr(char *str, int n);

     int
     winnstr(WINDOW *win, char *str, int n);

     int
     mvinnstr(int y, int x, char *str, int n);

     int
     mvwinnstr(WINDOW *win, int y, int x, char *str, int n);

     int
     instr(char *str);

     int
     winstr(WINDOW *win, char *str);

     int
     mvinstr(int y, int x, char *str);

     int
     mvwinstr(WINDOW *win, int y, int x, char *str);


DESCRIPTION

     These functions read the contents of stdscr or of the specified window.

     The inch() function returns the character that is displayed on stdscr at
     the current cursor position.

     The winch() function is the same as the inch() function, excepting that
     the character is read from window specified by win.

     The inchnstr() function fills an array of chtype with characters read
     from stdscr, the characters are read starting from the current cursor
     position and continuing until either n - 1 characters are read or the
     right hand side of the screen is reached.  The resulting character array
     will be NULL terminated.

     The winchnstr() function is the same as inchnstr() excepting that the
     characters are read from the window specified by win.

     The inchstr() and winchstr() functions are the same as the inchnstr() and
     winchnstr() functions, respectively, excepting that they do not limit the
     number of characters read.  The characters returned are those from the
     current starting position to the right hand side of the screen.  The use
     of inchstr() and winchstr() is not recommended as the character buffer
     can be overflowed.

     The innstr() function is similar to the inchstr() function, excepting
     that the array of characters returned is stripped of all the curses
     attributes making it a plain character string.

     The mvinchstr(), mvinchnstr(), mvwinchstr(), and mvwinchnstr() functions
     are the same as the inchstr(), inchnstr(), winchstr(), and winchstr()
     functions, respectively, except that wmove() is called to move the cursor
     to the position specified by y, x before the output is printed on the
     window.  Likewise, the mvinstr(), mvinnstr(), mvwinstr(), and mvwinnstr()
     functions are the same as the instr(), innstr(), winstr(), and winstr()
     functions, respectively, except that wmove() is called to move the cursor
     to the position specified by y, x before the output is printed on the
     window.

     The winnstr() function is the same as the innstr() function, excepting
     that characters are read from the window specified by win.

     The instr() and winstr() functions are the same as the innstr() and
     winnstr() functions, respectively, excepting that there are no limits
     placed on the size of the returned string, which may cause buffer over-
     flows.  For this reason, the use of instr() and winstr() is not recom-
     mended.


RETURN VALUES

     If the calls innstr(), mvinnstr(), mvwinnstr(), and winnstr() succeed
     then they will return the number of characters actually read.  Functions
     returning pointers will return NULL if an error is detected.  The func-
     tions that return an int will return one of the following values:

     OK   The function completed successfully.
     ERR  An error occurred in the function.


SEE ALSO

     curses_addch(3), curses_addstr(3), curses_attributes(3), curses_insch(3)


STANDARDS

     The NetBSD Curses library complies with the X/Open Curses specification,
     part of the Single Unix Specification.


NOTES

     The inchnstr() and innstr() function read at most n - 1 characters from
     the screen so as to leave room for NULL termination.  The X/Open specifi-
     cation is unclear as to whether or not this is the correct behaviour.


HISTORY

     The Curses package appeared in 4.0BSD.

NetBSD 10.1                    October 25, 2018                    NetBSD 10.1