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"
38 unpack_internal (gfc_array_char *ret, const gfc_array_char *vector,
39 const gfc_array_l4 *mask, const gfc_array_char *field,
40 index_type size, index_type fsize)
42 /* r.* indicates the return array. */
43 index_type rstride[GFC_MAX_DIMENSIONS];
47 /* v.* indicates the vector array. */
50 /* f.* indicates the field array. */
51 index_type fstride[GFC_MAX_DIMENSIONS];
54 /* m.* indicates the mask array. */
55 index_type mstride[GFC_MAX_DIMENSIONS];
57 const GFC_LOGICAL_4 *mptr;
59 index_type count[GFC_MAX_DIMENSIONS];
60 index_type extent[GFC_MAX_DIMENSIONS];
67 if (ret->data == NULL)
69 /* The front end has signalled that we need to populate the
70 return array descriptor. */
71 dim = GFC_DESCRIPTOR_RANK (mask);
73 for (n = 0; n < dim; n++)
76 ret->dim[n].stride = rs;
77 ret->dim[n].lbound = 0;
78 ret->dim[n].ubound = mask->dim[n].ubound - mask->dim[n].lbound;
79 extent[n] = ret->dim[n].ubound + 1;
80 empty = empty || extent[n] <= 0;
81 rstride[n] = ret->dim[n].stride * size;
82 fstride[n] = field->dim[n].stride * fsize;
83 mstride[n] = mask->dim[n].stride;
87 ret->data = internal_malloc_size (rs * size);
91 dim = GFC_DESCRIPTOR_RANK (ret);
92 for (n = 0; n < dim; n++)
95 extent[n] = ret->dim[n].ubound + 1 - ret->dim[n].lbound;
96 empty = empty || extent[n] <= 0;
97 rstride[n] = ret->dim[n].stride * size;
98 fstride[n] = field->dim[n].stride * fsize;
99 mstride[n] = mask->dim[n].stride;
113 vstride0 = vector->dim[0].stride * size;
116 rstride0 = rstride[0];
117 fstride0 = fstride[0];
118 mstride0 = mstride[0];
124 /* Use the same loop for both logical types. */
125 if (GFC_DESCRIPTOR_SIZE (mask) != 4)
127 if (GFC_DESCRIPTOR_SIZE (mask) != 8)
128 runtime_error ("Funny sized logical array");
129 for (n = 0; n < dim; n++)
132 mptr = GFOR_POINTER_L8_TO_L4 (mptr);
140 memcpy (rptr, vptr, size);
146 memcpy (rptr, fptr, size);
148 /* Advance to the next element. */
154 while (count[n] == extent[n])
156 /* When we get to the end of a dimension, reset it and increment
157 the next dimension. */
159 /* We could precalculate these products, but this is a less
160 frequently used path so probably not worth it. */
161 rptr -= rstride[n] * extent[n];
162 fptr -= fstride[n] * extent[n];
163 mptr -= mstride[n] * extent[n];
167 /* Break out of the loop. */
182 extern void unpack1 (gfc_array_char *, const gfc_array_char *,
183 const gfc_array_l4 *, const gfc_array_char *);
184 export_proto(unpack1);
187 unpack1 (gfc_array_char *ret, const gfc_array_char *vector,
188 const gfc_array_l4 *mask, const gfc_array_char *field)
190 unpack_internal (ret, vector, mask, field,
191 GFC_DESCRIPTOR_SIZE (vector),
192 GFC_DESCRIPTOR_SIZE (field));
195 extern void unpack1_char (gfc_array_char *, GFC_INTEGER_4,
196 const gfc_array_char *, const gfc_array_l4 *,
197 const gfc_array_char *, GFC_INTEGER_4,
199 export_proto(unpack1_char);
202 unpack1_char (gfc_array_char *ret,
203 GFC_INTEGER_4 ret_length __attribute__((unused)),
204 const gfc_array_char *vector, const gfc_array_l4 *mask,
205 const gfc_array_char *field, GFC_INTEGER_4 vector_length,
206 GFC_INTEGER_4 field_length)
208 unpack_internal (ret, vector, mask, field, vector_length, field_length);
211 extern void unpack0 (gfc_array_char *, const gfc_array_char *,
212 const gfc_array_l4 *, char *);
213 export_proto(unpack0);
216 unpack0 (gfc_array_char *ret, const gfc_array_char *vector,
217 const gfc_array_l4 *mask, char *field)
221 memset (&tmp, 0, sizeof (tmp));
224 unpack_internal (ret, vector, mask, &tmp, GFC_DESCRIPTOR_SIZE (vector), 0);
227 extern void unpack0_char (gfc_array_char *, GFC_INTEGER_4,
228 const gfc_array_char *, const gfc_array_l4 *,
229 char *, GFC_INTEGER_4, GFC_INTEGER_4);
230 export_proto(unpack0_char);
233 unpack0_char (gfc_array_char *ret,
234 GFC_INTEGER_4 ret_length __attribute__((unused)),
235 const gfc_array_char *vector, const gfc_array_l4 *mask,
236 char *field, GFC_INTEGER_4 vector_length,
237 GFC_INTEGER_4 field_length __attribute__((unused)))
241 memset (&tmp, 0, sizeof (tmp));
244 unpack_internal (ret, vector, mask, &tmp, vector_length, 0);