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.\" placed in the public domain by Will Naylor -*- nroff -*-
.\" 1998-08-21 formatting added by Jim Van Zandt <jrv@vanzandt.mv.com>
.TH WNCINF 3 "August 23, 1998" "WNLIB" ""
.SH NAME
wn_cstream_filename, wn_set_cstream_filename, wn_column_of_mark, wn_column_of_current_mark, wn_linenum_of_mark, wn_linenum_of_current_mark \- information about cstream
.SH SYNOPSIS
.nf
.B #include <wn/wncstr.h>
.sp
.B char *wn_cstream_filename(\fIstream\fP)
.B wn_cstream \fIstream\fP;
.sp
.B wn_set_cstream_filename(\fIstream\fP,\fIname\fP)
.B wn_cstream \fIstream\fP;
.B char \fIname\fP[];
.sp
.B int wn_column_of_mark(\fIstream\fP,\fImark\fP)
.B wn_cstream \fIstream\fP;
.B int \fImark\fP;
.sp
.B int wn_column_of_current_mark(\fIstream\fP)
.B wn_cstream \fIstream\fP;
.sp
.B int wn_linenum_of_mark(\fIstream\fP,\fImark\fP)
.B wn_cstream \fIstream\fP;
.B int \fImark\fP;
.sp
.B int wn_linenum_of_current_mark(\fIstream\fP)
.B wn_cstream \fIstream\fP;
.SH DESCRIPTION
These routines set and get various information about the cstream
\fIstream\fP. This information can be used to make helpful error
messages if a parse fails.
\fBwn_cstream_filename\fP returns the filename for \fIstream\fP previously
set by \fBwn_set_cstream_filename\fP. The default is \fBNULL\fP.
\fBwn_column_of_mark\fP returns the number of chars between the closest
previous linefeed and \fImark\fP. A linefeed is assumed to exist at
beginning of \fIstream\fP (\fImark\fP = -1).
\fBwn_column_of_current_mark\fP returns the number of chars between the
closest previous linefeed and the current \fImark\fP. A linefeed is
assumed to exist at beginning of \fIstream\fP (\fImark\fP = -1).
\fBwn_linenum_of_mark\fP returns the number of linefeeds between \fImark\fP
and beginning of \fIstream\fP. Line numbers start at 1.
\fBwn_linenum_of_current_mark\fP returns the number of linefeeds
between the current \fImark\fP and beginning of \fIstream\fP. Line numbers
start at 1.
.\".SH BUGS
.SH "SEE ALSO"
wncstr
.SH AUTHOR
Will Naylor
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