.\"***************************************************************************.\" Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *.\"                                                                          *.\" Permission is hereby granted, free of charge, to any person obtaining a  *.\" copy of this software and associated documentation files (the            *.\" "Software"), to deal in the Software without restriction, including      *.\" without limitation the rights to use, copy, modify, merge, publish,      *.\" distribute, distribute with modifications, sublicense, and/or sell       *.\" copies of the Software, and to permit persons to whom the Software is    *.\" furnished to do so, subject to the following conditions:                 *.\"                                                                          *.\" The above copyright notice and this permission notice shall be included  *.\" in all copies or substantial portions of the Software.                   *.\"                                                                          *.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *.\"                                                                          *.\" Except as contained in this notice, the name(s) of the above copyright   *.\" holders shall not be used in advertising or otherwise to promote the     *.\" sale, use or other dealings in this Software without prior written       *.\" authorization.                                                           *.\"***************************************************************************.\".\" $Id: curs_util.3x,v 1.12 2004/01/31 17:24:53 tom Exp $.TH curs_util 3X "".SH NAME\fBdelay_output\fR,\fBfilter\fR,\fBflushinp\fR,\fBgetwin\fR,\fBkey_name\fR,\fBkeyname\fR,\fBputwin\fR,\fBunctrl\fR,\fBuse_env\fR,\fBwunctrl\fR - miscellaneous \fBcurses\fR utility routines.SH SYNOPSIS\fB#include <curses.h>\fR.sp\fBchar *unctrl(chtype c);\fR.br\fBchar *wunctrl(cchar_t *c);\fR.br\fBchar *keyname(int c);\fR.br\fBchar *key_name(wchar_t w);\fR.br\fBvoid filter(void);\fR.br\fBvoid use_env(bool f);\fR.br\fBint putwin(WINDOW *win, FILE *filep);\fR.br\fBWINDOW *getwin(FILE *filep);\fR.br\fBint delay_output(int ms);\fR.br\fBint flushinp(void);\fR.br.SH DESCRIPTIONThe \fBunctrl\fR routine returns a character string which is a printablerepresentation of the character \fIc\fR, ignoring attributes.Control characters are displayed in the \fB^\fR\fIX\fR notation.Printing characters are displayed as is.The corresponding \fBwunctrl\fR returns a printable representation ofa wide-character..PPThe \fBkeyname\fR routine returns a character string corresponding to the key \fIc\fR.Control characters are displayed in the \fB^\fR\fIX\fR notation.Values above 128 are either meta characters, shown in the \fBM-\fR\fIX\fR notation,or the names of function keys, or null.The corresponding \fBkey_name\fR returns a character string correspondingto the wide-character value \fIw\fR.The two functions do not return the same set of strings;the latter returns null where the former would display a meta character..PPThe \fBfilter\fR routine, if used, must be called before \fBinitscr\fR or\fBnewterm\fR are called.  The effect is that, during those calls, \fBLINES\fRis set to 1; the capabilities \fBclear\fR, \fBcup\fR, \fBcud\fR, \fBcud1\fR,\fBcuu1\fR, \fBcuu\fR, \fBvpa\fR are disabled; and the \fBhome\fR string isset to the value of \fBcr\fR..PPThe \fBuse_env\fR routine, if used, is called before \fBinitscr\fR or\fBnewterm\fR are called.  When called with \fBFALSE\fR as anargument, the values of \fBlines\fR and \fBcolumns\fR specified in the\fIterminfo\fR database will be used, even if environment variables\fBLINES\fR and \fBCOLUMNS\fR (used by default) are set, or if\fBcurses\fR is running in a window (in which case default behaviorwould be to use the window size if \fBLINES\fR and \fBCOLUMNS\fR arenot set)..PPThe \fBputwin\fR routine writes all data associated with window \fIwin\fR intothe file to which \fIfilep\fR points.  This information can be later retrievedusing the \fBgetwin\fR function..PPThe \fBgetwin\fR routine reads window related data stored in the file by\fBputwin\fR.  The routine then creates and initializes a new window using thatdata.  It returns a pointer to the new window..PPThe \fBdelay_output\fR routine inserts an \fIms\fR millisecond pausein output.  This routine should not be used extensively becausepadding characters are used rather than a CPU pause.If no padding character is specified, this uses \fBnapms\fR to perform the delay..PPThe \fBflushinp\fR routine throws away any typeahead that has been typed by theuser and has not yet been read by the program..SH RETURN VALUEExcept for \fBflushinp\fR, routines that return an integer return \fBERR\fRupon failure and \fBOK\fR (SVr4 specifies only "an integer value other than\fBERR\fR") upon successful completion..PP\fBflushinp\fR always returns \fBOK\fR..PPRoutines that return pointers return \fBNULL\fR on error..SH PORTABILITYThe XSI Curses standard, Issue 4 describes these functions.It states that \fBunctrl\fR and \fBwunctrl\fR will return a null pointer ifunsuccessful, but does not define any error conditions..PPThe SVr4 documentation describes the action of \fBfilter\fR only in the vaguestterms.  The description here is adapted from the XSI Curses standard (whicherroneously fails to describe the disabling of \fBcuu\fR)..PPThe strings returned by \fBunctrl\fR in this implementation are determinedat compile time, showing C1 controls from the upper-128 codes with a `~'prefix rather than `^'.Other implementations typically show both sets of control characters with `^',and may strip the parameter to 7 bits.This implementation uses 8 bits but does not modify the string to reflectlocale..SH SEE ALSO\fBcurses\fR(3X),\fBcurs_initscr\fR(3X),\fBcurs_kernel\fR(3X),\fBcurs_scr_dump\fR(3X)..\"#.\"# The following sets edit modes for GNU EMACS.\"# Local Variables:.\"# mode:nroff.\"# fill-column:79.\"# End: