NAME
     wncinf -- information about cstream

SYNOPSIS
     #include "wncstr.h"

     char *wn_cstream_filename(stream)
     wn_cstream stream;

     wn_set_cstream_filename(stream,name)
     wn_cstream stream;
     char name[];

     int wn_column_of_mark(stream,mark)
     wn_cstream stream;
     int mark;

     int wn_column_of_current_mark(stream)
     wn_cstream stream;

     int wn_linenum_of_mark(stream,mark)
     wn_cstream stream;
     int mark;

     int wn_linenum_of_current_mark(stream)
     wn_cstream stream;

DESCRIPTION
     These routines set and get various information about the cstream
     "stream".  This information can be used to make helpful error
     messages if a parse fails.

     "wn_cstream_filename" returns the filename for "stream" previously
     set by "wn_set_cstream_filename".  The default is NULL.

     "wn_column_of_mark" returns the number of chars between the closest
     previous linefeed and "mark".  A linefeed is assumed to exist at
     beginning of stream (mark = -1).

     "wn_column_of_current_mark" returns the number of chars between the 
     closest previous linefeed and the current mark.  A linefeed is 
     assumed to exist at beginning of stream (mark = -1).

     "wn_linenum_of_mark" returns the number of linefeeds between "mark"
     and beginning of stream.  Line numbers start at 1.

     "wn_linenum_of_current_mark" returns the number of linefeeds 
     between the current mark and beginning of stream.  Line numbers
     start at 1.

BUGS

SEE ALSO
     wncstr

AUTHOR
     Will Naylor