1 `/* Implementation of the CSHIFT intrinsic
2 Copyright 2003 Free Software Foundation, Inc.
3 Contributed by Feng Wang <wf_cs@yahoo.com>
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 `#if defined (HAVE_'atype_name`)'
41 cshift1 (gfc_array_char * const restrict ret,
42 const gfc_array_char * const restrict array,
43 const atype * const restrict h,
44 const atype_name * const restrict pwhich,
47 /* r.* indicates the return array. */
48 index_type rstride[GFC_MAX_DIMENSIONS];
53 /* s.* indicates the source array. */
54 index_type sstride[GFC_MAX_DIMENSIONS];
59 /* h.* indicates the shift array. */
60 index_type hstride[GFC_MAX_DIMENSIONS];
62 const atype_name *hptr;
64 index_type count[GFC_MAX_DIMENSIONS];
65 index_type extent[GFC_MAX_DIMENSIONS];
77 if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
78 runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
80 if (ret->data == NULL)
84 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
86 ret->dtype = array->dtype;
87 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
89 ret->dim[i].lbound = 0;
90 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
93 ret->dim[i].stride = 1;
95 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
103 /* Initialized for avoiding compiler warnings. */
108 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
112 roffset = ret->dim[dim].stride * size;
115 soffset = array->dim[dim].stride * size;
118 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
123 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
124 rstride[n] = ret->dim[dim].stride * size;
125 sstride[n] = array->dim[dim].stride * size;
127 hstride[n] = h->dim[n].stride;
138 dim = GFC_DESCRIPTOR_RANK (array);
139 rstride0 = rstride[0];
140 sstride0 = sstride[0];
141 hstride0 = hstride[0];
148 /* Do the shift for this dimension. */
150 sh = (div (sh, len)).rem;
154 src = &sptr[sh * soffset];
157 for (n = 0; n < len; n++)
159 memcpy (dest, src, size);
161 if (n == len - sh - 1)
167 /* Advance to the next section. */
173 while (count[n] == extent[n])
175 /* When we get to the end of a dimension, reset it and increment
176 the next dimension. */
178 /* We could precalculate these products, but this is a less
179 frequently used path so proabably not worth it. */
180 rptr -= rstride[n] * extent[n];
181 sptr -= sstride[n] * extent[n];
182 hptr -= hstride[n] * extent[n];
186 /* Break out of the loop. */
201 void cshift1_`'atype_kind (gfc_array_char * const restrict,
202 const gfc_array_char * const restrict,
203 const atype * const restrict,
204 const atype_name * const restrict);
205 export_proto(cshift1_`'atype_kind);
208 cshift1_`'atype_kind (gfc_array_char * const restrict ret,
209 const gfc_array_char * const restrict array,
210 const atype * const restrict h,
211 const atype_name * const restrict pwhich)
213 cshift1 (ret, array, h, pwhich, GFC_DESCRIPTOR_SIZE (array));
216 void cshift1_`'atype_kind`'_char (gfc_array_char * const restrict ret,
218 const gfc_array_char * const restrict array,
219 const atype * const restrict h,
220 const atype_name * const restrict pwhich,
222 export_proto(cshift1_`'atype_kind`'_char);
225 cshift1_`'atype_kind`'_char (gfc_array_char * const restrict ret,
226 GFC_INTEGER_4 ret_length __attribute__((unused)),
227 const gfc_array_char * const restrict array,
228 const atype * const restrict h,
229 const atype_name * const restrict pwhich,
230 GFC_INTEGER_4 array_length)
232 cshift1 (ret, array, h, pwhich, array_length);