1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright 2002, 2005, 2007 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. */
31 #include "libgfortran.h"
38 `#if defined (HAVE_'atype_name`)
41 eoshift1 (gfc_array_char * const restrict ret,
42 const gfc_array_char * const restrict array,
43 const 'atype` * const restrict h,
44 const char * const restrict pbound,
45 const 'atype_name` * const restrict pwhich,
46 index_type size, const char * filler, index_type filler_len)
48 /* r.* indicates the return array. */
49 index_type rstride[GFC_MAX_DIMENSIONS];
54 /* s.* indicates the source array. */
55 index_type sstride[GFC_MAX_DIMENSIONS];
60 /* h.* indicates the shift array. */
61 index_type hstride[GFC_MAX_DIMENSIONS];
63 const 'atype_name` *hptr;
65 index_type count[GFC_MAX_DIMENSIONS];
66 index_type extent[GFC_MAX_DIMENSIONS];
74 /* The compiler cannot figure out that these are set, initialize
75 them to avoid warnings. */
88 if (ret->data == NULL)
92 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
94 ret->dtype = array->dtype;
95 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
97 ret->dim[i].lbound = 0;
98 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
101 ret->dim[i].stride = 1;
103 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
108 if (size0 ((array_t *) ret) == 0)
113 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
117 roffset = ret->dim[dim].stride * size;
120 soffset = array->dim[dim].stride * size;
123 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
128 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
129 rstride[n] = ret->dim[dim].stride * size;
130 sstride[n] = array->dim[dim].stride * size;
132 hstride[n] = h->dim[n].stride;
143 dim = GFC_DESCRIPTOR_RANK (array);
144 rstride0 = rstride[0];
145 sstride0 = sstride[0];
146 hstride0 = hstride[0];
153 /* Do the shift for this dimension. */
155 if (( sh >= 0 ? sh : -sh ) > len)
161 delta = (sh >= 0) ? sh: -sh;
165 src = &sptr[delta * soffset];
171 dest = &rptr[delta * roffset];
173 for (n = 0; n < len - delta; n++)
175 memcpy (dest, src, size);
186 memcpy (dest, pbound, size);
195 memset (dest, filler[0], size);
197 for (i = 0; i < size; i += filler_len)
198 memcpy (&dest[i], filler, filler_len);
203 /* Advance to the next section. */
209 while (count[n] == extent[n])
211 /* When we get to the end of a dimension, reset it and increment
212 the next dimension. */
214 /* We could precalculate these products, but this is a less
215 frequently used path so probably not worth it. */
216 rptr -= rstride[n] * extent[n];
217 sptr -= sstride[n] * extent[n];
218 hptr -= hstride[n] * extent[n];
222 /* Break out of the loop. */
237 void eoshift1_'atype_kind` (gfc_array_char * const restrict,
238 const gfc_array_char * const restrict,
239 const 'atype` * const restrict, const char * const restrict,
240 const 'atype_name` * const restrict);
241 export_proto(eoshift1_'atype_kind`);
244 eoshift1_'atype_kind` (gfc_array_char * const restrict ret,
245 const gfc_array_char * const restrict array,
246 const 'atype` * const restrict h,
247 const char * const restrict pbound,
248 const 'atype_name` * const restrict pwhich)
250 eoshift1 (ret, array, h, pbound, pwhich, GFC_DESCRIPTOR_SIZE (array),
255 void eoshift1_'atype_kind`_char (gfc_array_char * const restrict,
257 const gfc_array_char * const restrict,
258 const 'atype` * const restrict,
259 const char * const restrict,
260 const 'atype_name` * const restrict,
261 GFC_INTEGER_4, GFC_INTEGER_4);
262 export_proto(eoshift1_'atype_kind`_char);
265 eoshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
266 GFC_INTEGER_4 ret_length __attribute__((unused)),
267 const gfc_array_char * const restrict array,
268 const 'atype` * const restrict h,
269 const char * const restrict pbound,
270 const 'atype_name` * const restrict pwhich,
271 GFC_INTEGER_4 array_length,
272 GFC_INTEGER_4 bound_length __attribute__((unused)))
274 eoshift1 (ret, array, h, pbound, pwhich, array_length, " ", 1);
278 void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict,
280 const gfc_array_char * const restrict,
281 const 'atype` * const restrict,
282 const char * const restrict,
283 const 'atype_name` * const restrict,
284 GFC_INTEGER_4, GFC_INTEGER_4);
285 export_proto(eoshift1_'atype_kind`_char4);
288 eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
289 GFC_INTEGER_4 ret_length __attribute__((unused)),
290 const gfc_array_char * const restrict array,
291 const 'atype` * const restrict h,
292 const char * const restrict pbound,
293 const 'atype_name` * const restrict pwhich,
294 GFC_INTEGER_4 array_length,
295 GFC_INTEGER_4 bound_length __attribute__((unused)))
297 static const gfc_char4_t space = (unsigned char) ''` ''`;
298 eoshift1 (ret, array, h, pbound, pwhich, array_length * sizeof (gfc_char4_t),
299 (const char *) &space, sizeof (gfc_char4_t));