curs_ins_wstr.3x - Man Page

#include <curses.h>

int ins_wstr(const wchar_t * wstr);
int wins_wstr(WINDOW * win, const wchar_t * wstr);
int mvins_wstr(int y, int x, const wchar_t * wstr);
int mvwins_wstr(WINDOW * win, int y, int x,
      const wchar_t * wstr);

int ins_nwstr(const wchar_t * wstr, int n);
int wins_nwstr(WINDOW * win, const wchar_t * wstr, int n);
int mvins_nwstr(int y, int x, const wchar_t * wstr, int n);
int mvwins_nwstr(WINDOW * win, int y, int x,
      const wchar_t * wstr, int n);

wins_wstr inserts a wide-character string wstr before the character at the cursor in window win as if by calling wins_wch(3X) for each wchar_t in wstr. No line wrapping is performed. Characters to the right of the cursor are shifted right; those at the right edge of the window may be lost. wins_wstr stops inserting if it would have to wrap to the next line to write the next wchar_t in wstr. The cursor position does not change (after moving to (y, x), if specified). wins_nwstr does the same, but inserts at most n characters, or as many as possible (up to the end of the line) if n is negative. ncurses(3X) describes the variants of these functions.

These functions return OK on success and ERR on failure.

In ncurses, they return ERR if

• win is NULL,
• wstr is NULL,
• the first wide character in wstr is a non-spacing character, or
• an internal wins_wch(3X) call returns ERR.

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 wins_nwstr may be implemented as macros.

ins_nwstr, wins_nwstr, mvins_nwstr, and mvwins_nwstr's acceptance of negative n values is an ncurses extension.

Applications employing ncurses extensions should condition their use on the visibility of the NCURSES_VERSION preprocessor macro.

X/Open Curses Issue 4 describes these functions. It specifies no error conditions for them.

X/Open Curses does not specify what happens if a non-spacing character follows a control character.

Issue 4 states that the entire string is inserted if n is less than 1. This is probably an error, because it is inconsistent with other functions such as waddwstr, and differs from the SVr4 curses and Solaris xcurses implementations. Nevertheless, Issue 7 retains the language.

These functions were initially specified by X/Open Curses Issue 4. The System V Interface Definition Version 4 (1995), specified functions named winswstr and winsnwstr (and the usual variants). These were later additions to SVr4.x, not appearing in the first SVr4 (1989). They differ from X/Open's later wins_wstr and wins_nwstr in that their wstr parameters are not const-qualified.

curs_insstr(3X) describes comparable functions of the ncurses library in its non-wide-character configuration.

curses(3X), curs_ins_wch(3X), curs_in_wch(3X)

The man pages ins_nwstr.3x(3), ins_wstr.3x(3), mvins_nwstr.3x(3), mvins_wstr.3x(3), mvwins_nwstr.3x(3), mvwins_wstr.3x(3), wins_nwstr.3x(3) and wins_wstr.3x(3) are aliases of curs_ins_wstr.3x(3).