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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<fset.h>
+
+.help clpopn[isu], clplen, clgfil, clpcls
+.nf ___________________________________________________________________________
+Expand a filename template given as the string value of a CL parameter.
+
+	clpopni - open a sorted input list or open list "STDIN"
+	clpopns - open a sorted list
+	clpopnu - open an unsorted list
+	 clpcls - close a list
+	 clplen - get number of filenames in list
+	 clgfil - get next filename from list
+	 clprew - rewind the list
+
+The CLPOPNI procedure creates a dummy list containing the single filename
+"STDIN" if the standard input is redirected.
+.endhelp ______________________________________________________________________
+
+
+# CLPOPNI -- Open an input list (sorted list of input files).  If the standard
+# input has been redirected, create a dummy list containing the single file
+# name "STDIN", and do not try to access the template parameter.
+
+int procedure clpopni (param)
+
+char	param[ARB]			# CL filename template parameter
+int	sort
+pointer	sp, template, list
+int	fntopnb(), fstati()
+
+begin
+	call smark (sp)
+	call salloc (template, SZ_COMMAND, TY_CHAR)
+
+	sort = YES
+
+	if (fstati (STDIN, F_REDIR) == YES)
+	    list = fntopnb ("STDIN", sort)
+	else {
+	    call clgstr (param, Memc[template], SZ_COMMAND)
+	    list = fntopnb (Memc[template], sort)
+	}
+
+	call sfree (sp)
+	return (list)
+end
+
+
+# CLPOPNS -- Open a sorted list (sorted list of files, not associated with any
+# particular byte stream).
+
+int procedure clpopns (param)
+
+char	param[ARB]			# CL filename template parameter
+int	sort
+pointer	sp, template, list
+int	fntopnb()
+
+begin
+	call smark (sp)
+	call salloc (template, SZ_COMMAND, TY_CHAR)
+
+	sort = YES
+
+	call clgstr (param, Memc[template], SZ_COMMAND)
+	list = fntopnb (Memc[template], sort)
+
+	call sfree (sp)
+	return (list)
+end
+
+
+# CLPOPNU -- Open an unsorted list (unsorted list of files, not associated
+# with any particular stream).
+
+int procedure clpopnu (param)
+
+char	param[ARB]			# CL filename template parameter
+int	sort
+pointer	sp, template, list
+int	fntopnb()
+
+begin
+	call smark (sp)
+	call salloc (template, SZ_COMMAND, TY_CHAR)
+
+	sort = NO
+
+	call clgstr (param, Memc[template], SZ_COMMAND)
+	list = fntopnb (Memc[template], sort)
+
+	call sfree (sp)
+	return (list)
+end
+
+
+# CLPLEN -- Return the number of file names in the list.
+
+int procedure clplen (list)
+
+pointer	list
+int	fntlenb()
+
+begin
+	return (fntlenb (list))
+end
+
+
+# CLGFIL -- Return the next filename from the list.
+
+int procedure clgfil (list, fname, maxch)
+
+int	list			# list descriptor
+char	fname[ARB]		# output string
+int	maxch
+int	fntgfnb()
+
+begin
+	return (fntgfnb (list, fname, maxch))
+end
+
+
+# CLPCLS -- Close a filename list and return all storage.
+
+procedure clpcls (list)
+
+int	list			# list descriptor
+
+begin
+	call fntclsb (list)
+end
+
+
+# GLPREW -- Rewind the filename list.
+
+procedure clprew (list)
+
+int	list			# list descriptor
+
+begin
+	call fntrewb (list)
+end