1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright 2002, 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 Libgfortran 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"'
39 eoshift1 (gfc_array_char *ret, const gfc_array_char *array, const atype *h,
40 const char *pbound, const atype_name *pwhich, index_type size,
43 /* r.* indicates the return array. */
44 index_type rstride[GFC_MAX_DIMENSIONS];
49 /* s.* indicates the source array. */
50 index_type sstride[GFC_MAX_DIMENSIONS];
55 ` /* h.* indicates the shift array. */'
56 index_type hstride[GFC_MAX_DIMENSIONS];
58 const atype_name *hptr;
60 index_type count[GFC_MAX_DIMENSIONS];
61 index_type extent[GFC_MAX_DIMENSIONS];
69 /* The compiler cannot figure out that these are set, initialize
70 them to avoid warnings. */
83 if (ret->data == NULL)
87 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
89 ret->dtype = array->dtype;
90 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
92 ret->dim[i].lbound = 0;
93 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
96 ret->dim[i].stride = 1;
98 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
103 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
107 roffset = ret->dim[dim].stride * size;
110 soffset = array->dim[dim].stride * size;
113 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
118 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
119 rstride[n] = ret->dim[dim].stride * size;
120 sstride[n] = array->dim[dim].stride * size;
122 hstride[n] = h->dim[n].stride;
133 dim = GFC_DESCRIPTOR_RANK (array);
134 rstride0 = rstride[0];
135 sstride0 = sstride[0];
136 hstride0 = hstride[0];
143 ` /* Do the shift for this dimension. */'
145 if (( sh >= 0 ? sh : -sh ) > len)
151 delta = (sh >= 0) ? sh: -sh;
155 src = &sptr[delta * soffset];
161 dest = &rptr[delta * roffset];
163 for (n = 0; n < len - delta; n++)
165 memcpy (dest, src, size);
176 memcpy (dest, pbound, size);
182 memset (dest, filler, size);
186 /* Advance to the next section. */
192 while (count[n] == extent[n])
194 /* When we get to the end of a dimension, reset it and increment
195 the next dimension. */
197 /* We could precalculate these products, but this is a less
198 frequently used path so proabably not worth it. */
199 rptr -= rstride[n] * extent[n];
200 sptr -= sstride[n] * extent[n];
201 hptr -= hstride[n] * extent[n];
205 /* Break out of the loop. */
220 void eoshift1_`'atype_kind (gfc_array_char *, const gfc_array_char *,
221 const atype *, const char *, const atype_name *);
222 export_proto(eoshift1_`'atype_kind);
225 eoshift1_`'atype_kind (gfc_array_char *ret, const gfc_array_char *array,
226 const atype *h, const char *pbound,
227 const atype_name *pwhich)
229 eoshift1 (ret, array, h, pbound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
232 void eoshift1_`'atype_kind`'_char (gfc_array_char *, GFC_INTEGER_4,
233 const gfc_array_char *, const atype *,
234 const char *, const atype_name *,
235 GFC_INTEGER_4, GFC_INTEGER_4);
236 export_proto(eoshift1_`'atype_kind`'_char);
239 eoshift1_`'atype_kind`'_char (gfc_array_char *ret,
240 GFC_INTEGER_4 ret_length __attribute__((unused)),
241 const gfc_array_char *array, const atype *h,
242 const char *pbound, const atype_name *pwhich,
243 GFC_INTEGER_4 array_length,
244 GFC_INTEGER_4 bound_length
245 __attribute__((unused)))
247 eoshift1 (ret, array, h, pbound, pwhich, array_length, ' ');