libgfortran/intrinsics/size.c

   1 /* Implementation of the size intrinsic.
   2    Copyright (C) 2002-2023 Free Software Foundation, Inc.
   3    Contributed by Paul Brook <paul@nowt.org>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27
  28 /* Note: This function is only used internally in libgfortran and old FE code,
  29    new code generates the code inline.  */
  30 index_type
  31 size0 (const array_t * array)
  32 {
  33   int n;
  34   index_type size;
  35   index_type len;
  36
  37   size = 1;
  38   for (n = 0; n < GFC_DESCRIPTOR_RANK (array); n++)
  39     {
  40       len = GFC_DESCRIPTOR_EXTENT(array,n);
  41       if (len < 0)
  42         len = 0;
  43       size *= len;
  44     }
  45   return size;
  46 }
  47 iexport(size0);
  48
  49 extern index_type size1 (const array_t * array, index_type dim);
  50 export_proto(size1);
  51
  52 /* Note: This function it is unused in libgfortran itself and the FE no longer
  53    call it; however, old code might still call it. */
  54 index_type
  55 size1 (const array_t * array, index_type dim)
  56 {
  57   index_type size;
  58
  59   dim--;
  60
  61   size = GFC_DESCRIPTOR_EXTENT(array,dim);
  62   if (size < 0)
  63     size = 0;
  64   return size;
  65 }