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1 /* Implementation of the ASSOCIATED intrinsic
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2 Copyright (C) 2003-2018 Free Software Foundation, Inc.
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3 Contributed by kejia Zhao (CCRG) <kejia_zh@yahoo.com.cn>
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4
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5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
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6
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7 Libgfortran is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU General Public
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9 License as published by the Free Software Foundation; either
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10 version 3 of the License, or (at your option) any later version.
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11
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12 Libgfortran is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 #include "libgfortran.h"
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27
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28 extern int associated (const gfc_array_void *, const gfc_array_void *);
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29 export_proto(associated);
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30
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31 int
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32 associated (const gfc_array_void *pointer, const gfc_array_void *target)
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33 {
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34 int n, rank;
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35
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36 if (GFC_DESCRIPTOR_DATA (pointer) == NULL)
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37 return 0;
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38 if (GFC_DESCRIPTOR_DATA (pointer) != GFC_DESCRIPTOR_DATA (target))
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39 return 0;
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40 if (GFC_DESCRIPTOR_DTYPE (pointer).elem_len != GFC_DESCRIPTOR_DTYPE (target).elem_len)
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41 return 0;
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42 if (GFC_DESCRIPTOR_DTYPE (pointer).type != GFC_DESCRIPTOR_DTYPE (target).type)
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43 return 0;
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44
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45 rank = GFC_DESCRIPTOR_RANK (pointer);
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46 for (n = 0; n < rank; n++)
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47 {
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48 long extent;
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49 extent = GFC_DESCRIPTOR_EXTENT(pointer,n);
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50
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51 if (extent != GFC_DESCRIPTOR_EXTENT(target,n))
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52 return 0;
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53 if (GFC_DESCRIPTOR_STRIDE(pointer,n) != GFC_DESCRIPTOR_STRIDE(target,n) && extent != 1)
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54 return 0;
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55 if (extent <= 0)
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56 return 0;
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57 }
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58
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59 return 1;
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60 }
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