1 files changed, 58 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/associated.c b/libgfortran/intrinsics/associated.c
new file mode 100644
index 0000000000..b40ec48158
--- /dev/null
+++ b/libgfortran/intrinsics/associated.c
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+/* Implementation of the ASSOCIATED intrinsic
+   Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   Contributed by kejia Zhao (CCRG) <kejia_zh@yahoo.com.cn>
+
+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 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"
+
+extern int associated (const gfc_array_void *, const gfc_array_void *);
+export_proto(associated);
+
+int
+associated (const gfc_array_void *pointer, const gfc_array_void *target)
+{
+  int n, rank;
+
+  if (GFC_DESCRIPTOR_DATA (pointer) == NULL)
+    return 0;
+  if (GFC_DESCRIPTOR_DATA (pointer) != GFC_DESCRIPTOR_DATA (target))
+    return 0;
+  if (GFC_DESCRIPTOR_DTYPE (pointer) != GFC_DESCRIPTOR_DTYPE (target))
+    return 0;
+
+  rank = GFC_DESCRIPTOR_RANK (pointer);
+  for (n = 0; n < rank; n++)
+    {
+      long extent;
+      extent = GFC_DESCRIPTOR_EXTENT(pointer,n);
+
+      if (extent != GFC_DESCRIPTOR_EXTENT(target,n))
+        return 0;
+      if (GFC_DESCRIPTOR_STRIDE(pointer,n) != GFC_DESCRIPTOR_STRIDE(target,n) && extent != 1)
+        return 0;
+      if (extent <= 0)
+	return 0;
+    }
+
+  return 1;
+}