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Diffstat (limited to 'ncurses-5.3/man/curs_scanw.3x')
| -rw-r--r-- | ncurses-5.3/man/curs_scanw.3x | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/ncurses-5.3/man/curs_scanw.3x b/ncurses-5.3/man/curs_scanw.3x new file mode 100644 index 0000000..a67cd73 --- /dev/null +++ b/ncurses-5.3/man/curs_scanw.3x @@ -0,0 +1,97 @@ +.\"*************************************************************************** +.\" Copyright (c) 1998,2000 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. * +.\"*************************************************************************** +.\" +.\" $Id$ +.TH curs_scanw 3X "" +.SH NAME +\fBscanw\fR, +\fBwscanw\fR, +\fBmvscanw\fR, +\fBmvwscanw\fR, +\fBvwscanw\fR, \fBvw_scanw\fR - convert formatted input from a \fBcurses\fR window +.SH SYNOPSIS +\fB#include <curses.h>\fR + +\fBint scanw(char *fmt, ...);\fR +.br +\fBint wscanw(WINDOW *win, char *fmt, ...);\fR +.br +\fBint mvscanw(int y, int x, char *fmt, ...);\fR +.br +\fBint mvwscanw(WINDOW *win, int y, int x, char *fmt, ...);\fR +.br +\fBint vw_scanw(WINDOW *win, char *fmt, va_list varglist);\fR +.br +\fBint vwscanw(WINDOW *win, char *fmt, va_list varglist);\fR +.SH DESCRIPTION +The \fBscanw\fR, \fBwscanw\fR and \fBmvscanw\fR routines are analogous to +\fBscanf\fR [see \fBscanf\fR(3S)]. The effect of these routines is as though +\fBwgetstr\fR were called on the window, and the resulting line used as input +for \fBsscanf\fR(3). Fields which do not map to a variable in the \fIfmt\fR +field are lost. + +The \fBvwscanw\fR and \fBvw_scanw\fR routines are analogous to \fBvscanf\fR. +They perform a \fBwscanw\fR using a variable argument list. +The third argument is a \fIva_list\fR, +a pointer to a list of arguments, as defined in \fB<stdarg.h>\fR. +.SH RETURN VALUE +\fBvwscanw\fR returns \fBERR\fR on failure and an integer equal to the +number of fields scanned on success. + +Applications may use the return value from the \fBscanw\fR, \fBwscanw\fR, +\fBmvscanw\fR and \fBmvwscanw\fR routines to determine the number of fields +which were mapped in the call. +.SH PORTABILITY +The XSI Curses standard, Issue 4 describes these functions. The function +\fBvwscanw\fR is marked TO BE WITHDRAWN, and is to be replaced by a function +\fBvw_scanw\fR using the \fB<stdarg.h>\fR interface. +The Single Unix Specification, Version 2 states that +\fBvw_scanw\fR is preferred to \fBvwscanw\fR since the latter requires +including \fB<varargs.h>\fR, which +cannot be used in the same file as \fB<stdarg.h>\fR. +This implementation uses \fB<stdarg.h>\fR for both, because that header +is included in \fB<curses.h\fR>. +.LP +Both XSI and The Single Unix Specification, Version 2 state that these +functions return ERR or OK. +Since the underlying \fBscanf\fR can return the number of items scanned, +and the SVr4 code was documented to use this feature, +this is probably an editing error which was introduced in XSI, +rather than being done intentionally. +Portable applications should only test if the return value is ERR, +since the OK value (zero) is likely to be misleading. +One possible way to get useful results would be to use a "%n" conversion +at the end of the format string to ensure that something was processed. +.SH SEE ALSO +\fBcurses\fR(3X), \fBcurs_getstr\fR(3X), \fBcurs_printw\fR(3X), \fBscanf\fR(3S) +.\"# +.\"# The following sets edit modes for GNU EMACS +.\"# Local Variables: +.\"# mode:nroff +.\"# fill-column:79 +.\"# End: |