+/* Implementation of the ISATTY and TTYNAM g77 intrinsics.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
+
+This file is part of the GNU Fortran 95 runtime library (libgfortran).
+
+Libgfortran is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+Libgfortran is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public
+License along with libgfortran; see the file COPYING. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+#include "../io/io.h"
+#include <string.h>
+
+/* LOGICAL FUNCTION ISATTY(UNIT)
+ INTEGER, INTENT(IN) :: UNIT */
+
+extern GFC_LOGICAL_4 isatty_l4 (int *);
+export_proto(isatty_l4);
+
+GFC_LOGICAL_4
+isatty_l4 (int *unit)
+{
+ gfc_unit *u;
+
+ u = find_unit (*unit);
+ if (u != NULL)
+ return (GFC_LOGICAL_4) stream_isatty (u->s);
+ else
+ return 0;
+}
+
+
+extern GFC_LOGICAL_8 isatty_l8 (int *);
+export_proto(isatty_l8);
+
+GFC_LOGICAL_8
+isatty_l8 (int *unit)
+{
+ gfc_unit *u;
+
+ u = find_unit (*unit);
+ if (u != NULL)
+ return (GFC_LOGICAL_8) stream_isatty (u->s);
+ else
+ return 0;
+}
+
+
+/* SUBROUTINE TTYNAM(UNIT,NAME)
+ INTEGER,SCALAR,INTENT(IN) :: UNIT
+ CHARACTER,SCALAR,INTENT(OUT) :: NAME */
+
+extern void ttynam_sub (int *, char *, gfc_charlen_type);
+export_proto(ttynam_sub);
+
+void
+ttynam_sub (int *unit, char * name, gfc_charlen_type name_len)
+{
+ gfc_unit *u;
+ char * n;
+ int i;
+
+ memset (name, ' ', name_len);
+ u = find_unit (*unit);
+ if (u != NULL)
+ {
+ n = stream_ttyname (u->s);
+ if (n != NULL)
+ {
+ i = 0;
+ while (*n && i < name_len)
+ name[i++] = *(n++);
+ }
+ }
+}