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 eoshift3 (gfc_array_char *ret, const gfc_array_char *array, const atype *h,
40 const gfc_array_char *bound, const atype_name *pwhich,
41 index_type size, char filler)
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;
59 /* b.* indicates the bound array. */
60 index_type bstride[GFC_MAX_DIMENSIONS];
64 index_type count[GFC_MAX_DIMENSIONS];
65 index_type extent[GFC_MAX_DIMENSIONS];
73 /* The compiler cannot figure out that these are set, initialize
74 them to avoid warnings. */
84 if (ret->data == NULL)
88 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
90 ret->dtype = array->dtype;
91 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
93 ret->dim[i].lbound = 0;
94 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
97 ret->dim[i].stride = 1;
99 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
107 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
111 roffset = ret->dim[dim].stride * size;
114 soffset = array->dim[dim].stride * size;
117 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
122 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
123 rstride[n] = ret->dim[dim].stride * size;
124 sstride[n] = array->dim[dim].stride * size;
126 hstride[n] = h->dim[n].stride;
128 bstride[n] = bound->dim[n].stride * size;
140 if (bound && bstride[0] == 0)
143 dim = GFC_DESCRIPTOR_RANK (array);
144 rstride0 = rstride[0];
145 sstride0 = sstride[0];
146 hstride0 = hstride[0];
147 bstride0 = bstride[0];
158 ` /* Do the shift for this dimension. */'
160 if (( sh >= 0 ? sh : -sh ) > len)
166 delta = (sh >= 0) ? sh: -sh;
170 src = &sptr[delta * soffset];
176 dest = &rptr[delta * roffset];
178 for (n = 0; n < len - delta; n++)
180 memcpy (dest, src, size);
191 memcpy (dest, bptr, size);
197 memset (dest, filler, size);
201 /* Advance to the next section. */
208 while (count[n] == extent[n])
210 /* When we get to the end of a dimension, reset it and increment
211 the next dimension. */
213 /* We could precalculate these products, but this is a less
214 frequently used path so proabably not worth it. */
215 rptr -= rstride[n] * extent[n];
216 sptr -= sstride[n] * extent[n];
217 hptr -= hstride[n] * extent[n];
218 bptr -= bstride[n] * extent[n];
222 /* Break out of the loop. */
238 extern void eoshift3_`'atype_kind (gfc_array_char *, const gfc_array_char *,
239 const atype *, const gfc_array_char *,
241 export_proto(eoshift3_`'atype_kind);
244 eoshift3_`'atype_kind (gfc_array_char *ret, const gfc_array_char *array,
245 const atype *h, const gfc_array_char *bound,
246 const atype_name *pwhich)
248 eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
251 extern void eoshift3_`'atype_kind`'_char (gfc_array_char *, GFC_INTEGER_4,
252 const gfc_array_char *,
254 const gfc_array_char *,
255 const atype_name *, GFC_INTEGER_4,
257 export_proto(eoshift3_`'atype_kind`'_char);
260 eoshift3_`'atype_kind`'_char (gfc_array_char *ret,
261 GFC_INTEGER_4 ret_length __attribute__((unused)),
262 const gfc_array_char *array, const atype *h,
263 const gfc_array_char *bound,
264 const atype_name *pwhich,
265 GFC_INTEGER_4 array_length,
266 GFC_INTEGER_4 bound_length
267 __attribute__((unused)))
269 eoshift3 (ret, array, h, bound, pwhich, array_length, ' ');