1 /* Generic implementation of the UNPACK intrinsic
2 Copyright 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
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 2 of the License, or (at your option) any later version.
12 In addition to the permissions in the GNU General Public License, the
13 Free Software Foundation gives you unlimited permission to link the
14 compiled version of this file into combinations with other programs,
15 and to distribute those combinations without any restriction coming
16 from the use of this file. (The General Public License restrictions
17 do apply in other respects; for example, they cover modification of
18 the file, and distribution when not linked into a combine
21 Ligbfortran is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public
27 License along with libgfortran; see the file COPYING. If not,
28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
29 Boston, MA 02110-1301, USA. */
35 #include "libgfortran.h"
37 extern void unpack1 (gfc_array_char *, const gfc_array_char *,
38 const gfc_array_l4 *, const gfc_array_char *);
39 iexport_proto(unpack1);
42 unpack1 (gfc_array_char *ret, const gfc_array_char *vector,
43 const gfc_array_l4 *mask, const gfc_array_char *field)
45 /* r.* indicates the return array. */
46 index_type rstride[GFC_MAX_DIMENSIONS];
50 /* v.* indicates the vector array. */
53 /* f.* indicates the field array. */
54 index_type fstride[GFC_MAX_DIMENSIONS];
57 /* m.* indicates the mask array. */
58 index_type mstride[GFC_MAX_DIMENSIONS];
60 const GFC_LOGICAL_4 *mptr;
62 index_type count[GFC_MAX_DIMENSIONS];
63 index_type extent[GFC_MAX_DIMENSIONS];
69 size = GFC_DESCRIPTOR_SIZE (ret);
70 /* A field element size of 0 actually means this is a scalar. */
71 fsize = GFC_DESCRIPTOR_SIZE (field);
72 if (ret->data == NULL)
74 /* The front end has signalled that we need to populate the
75 return array descriptor. */
76 dim = GFC_DESCRIPTOR_RANK (mask);
78 for (n = 0; n < dim; n++)
81 ret->dim[n].stride = rs;
82 ret->dim[n].lbound = 0;
83 ret->dim[n].ubound = mask->dim[n].ubound - mask->dim[n].lbound;
84 extent[n] = ret->dim[n].ubound + 1;
85 rstride[n] = ret->dim[n].stride * size;
86 fstride[n] = field->dim[n].stride * fsize;
87 mstride[n] = mask->dim[n].stride;
91 ret->data = internal_malloc_size (rs * size);
95 dim = GFC_DESCRIPTOR_RANK (ret);
96 for (n = 0; n < dim; n++)
99 extent[n] = ret->dim[n].ubound + 1 - ret->dim[n].lbound;
100 rstride[n] = ret->dim[n].stride * size;
101 fstride[n] = field->dim[n].stride * fsize;
102 mstride[n] = mask->dim[n].stride;
112 vstride0 = vector->dim[0].stride * size;
115 rstride0 = rstride[0];
116 fstride0 = fstride[0];
117 mstride0 = mstride[0];
123 /* Use the same loop for both logical types. */
124 if (GFC_DESCRIPTOR_SIZE (mask) != 4)
126 if (GFC_DESCRIPTOR_SIZE (mask) != 8)
127 runtime_error ("Funny sized logical array");
128 for (n = 0; n < dim; n++)
131 mptr = GFOR_POINTER_L8_TO_L4 (mptr);
139 memcpy (rptr, vptr, size);
145 memcpy (rptr, fptr, size);
147 /* Advance to the next element. */
153 while (count[n] == extent[n])
155 /* When we get to the end of a dimension, reset it and increment
156 the next dimension. */
158 /* We could precalculate these products, but this is a less
159 frequently used path so proabably not worth it. */
160 rptr -= rstride[n] * extent[n];
161 fptr -= fstride[n] * extent[n];
162 mptr -= mstride[n] * extent[n];
166 /* Break out of the loop. */
182 extern void unpack0 (gfc_array_char *, const gfc_array_char *,
183 const gfc_array_l4 *, char *);
184 export_proto(unpack0);
187 unpack0 (gfc_array_char *ret, const gfc_array_char *vector,
188 const gfc_array_l4 *mask, char *field)
194 unpack1 (ret, vector, mask, &tmp);