1 files changed, 142 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/hostnm.c b/libgfortran/intrinsics/hostnm.c
new file mode 100644
index 0000000000..2ccb5bdb37
--- /dev/null
+++ b/libgfortran/intrinsics/hostnm.c
@@ -0,0 +1,142 @@
+/* Implementation of the HOSTNM intrinsic.
+   Copyright (C) 2005-2017 Free Software Foundation, Inc.
+   Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
+
+This file is part of the GNU Fortran 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 3 of the License, or (at your option) any later version.
+
+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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "libgfortran.h"
+
+#include <errno.h>
+#include <string.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h> 
+#endif
+
+#include <limits.h>
+
+#ifndef HOST_NAME_MAX
+#define HOST_NAME_MAX 255
+#endif
+
+
+/* Windows32 version */
+#if defined __MINGW32__ && !defined  HAVE_GETHOSTNAME
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <errno.h>
+
+static int
+w32_gethostname (char *name, size_t len)
+{
+  /* We could try the WinSock API gethostname, but that will
+     fail if WSAStartup function has has not been called.  We don't
+    really need a name that will be understood by socket API, so avoid
+    unnecessary dependence on WinSock libraries by using
+    GetComputerName instead.  */
+
+  /* On Win9x GetComputerName fails if the input size is less
+     than MAX_COMPUTERNAME_LENGTH + 1.  */
+  char buffer[MAX_COMPUTERNAME_LENGTH + 1];
+  DWORD size =  sizeof (buffer);
+
+  if (!GetComputerName (buffer, &size))
+    return -1;
+
+  if ((size = strlen (buffer) + 1)  > len)
+    {
+      errno = EINVAL;
+      /* Truncate as per POSIX spec.  We do not NUL-terminate. */
+      size = len;
+    }
+  memcpy (name, buffer, (size_t) size);
+
+  return 0;
+}
+
+#undef gethostname
+#define gethostname w32_gethostname
+#define  HAVE_GETHOSTNAME 1
+
+#endif
+
+
+/* SUBROUTINE HOSTNM(NAME, STATUS)
+   CHARACTER(len=*), INTENT(OUT) :: NAME
+   INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
+
+#ifdef HAVE_GETHOSTNAME
+static int
+hostnm_0 (char *name, gfc_charlen_type name_len)
+{
+  int val, i;
+  char p[HOST_NAME_MAX + 1];
+
+  memset (name, ' ', name_len);
+
+  size_t reqlen = sizeof (p) > (size_t) name_len + 1
+    ? (size_t) name_len + 1: sizeof (p);
+  val = gethostname (p, reqlen);
+
+  if (val == 0)
+  {
+    i = -1;
+    while (i < name_len && p[++i] != '\0')
+      name[i] = p[i];
+  }
+
+  return ((val == 0) ? 0 : errno);
+}
+
+extern void hostnm_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type);
+iexport_proto(hostnm_i4_sub);
+
+void
+hostnm_i4_sub (char *name, GFC_INTEGER_4 *status, gfc_charlen_type name_len)
+{
+  int val = hostnm_0 (name, name_len);
+  if (status != NULL) 
+    *status = val;
+}
+iexport(hostnm_i4_sub);
+
+extern void hostnm_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type);
+iexport_proto(hostnm_i8_sub);
+
+void
+hostnm_i8_sub (char *name, GFC_INTEGER_8 *status, gfc_charlen_type name_len)
+{
+  int val = hostnm_0 (name, name_len);
+  if (status != NULL) 
+    *status = val;
+}
+iexport(hostnm_i8_sub);
+
+extern GFC_INTEGER_4 hostnm (char *, gfc_charlen_type);
+export_proto(hostnm);
+
+GFC_INTEGER_4
+hostnm (char *name, gfc_charlen_type name_len)
+{
+  return hostnm_0 (name, name_len);
+}
+#endif