1 `/* Implementation of the RESHAPE
2 Copyright 2002, 2006, 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"
37 `#if defined (HAVE_'rtype_name`)
39 typedef GFC_ARRAY_DESCRIPTOR(1, 'index_type`) 'shape_type`;'
41 dnl For integer routines, only the kind (ie size) is used to name the
42 dnl function. The same function will be used for integer and logical
43 dnl arrays of the same kind.
45 `extern void reshape_'rtype_ccode` ('rtype` * const restrict,
46 'rtype` * const restrict,
47 'shape_type` * const restrict,
48 'rtype` * const restrict,
49 'shape_type` * const restrict);
50 export_proto(reshape_'rtype_ccode`);
53 reshape_'rtype_ccode` ('rtype` * const restrict ret,
54 'rtype` * const restrict source,
55 'shape_type` * const restrict shape,
56 'rtype` * const restrict pad,
57 'shape_type` * const restrict order)
59 /* r.* indicates the return array. */
60 index_type rcount[GFC_MAX_DIMENSIONS];
61 index_type rextent[GFC_MAX_DIMENSIONS];
62 index_type rstride[GFC_MAX_DIMENSIONS];
69 /* s.* indicates the source array. */
70 index_type scount[GFC_MAX_DIMENSIONS];
71 index_type sextent[GFC_MAX_DIMENSIONS];
72 index_type sstride[GFC_MAX_DIMENSIONS];
76 const 'rtype_name` *sptr;
77 /* p.* indicates the pad array. */
78 index_type pcount[GFC_MAX_DIMENSIONS];
79 index_type pextent[GFC_MAX_DIMENSIONS];
80 index_type pstride[GFC_MAX_DIMENSIONS];
83 const 'rtype_name` *pptr;
85 const 'rtype_name` *src;
88 int sempty, pempty, shape_empty;
89 index_type shape_data[GFC_MAX_DIMENSIONS];
91 rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
92 if (rdim != GFC_DESCRIPTOR_RANK(ret))
93 runtime_error("rank of return array incorrect in RESHAPE intrinsic");
97 for (n = 0; n < rdim; n++)
99 shape_data[n] = shape->data[n * shape->dim[0].stride];
100 if (shape_data[n] <= 0)
107 if (ret->data == NULL)
110 for (n = 0; n < rdim; n++)
112 ret->dim[n].lbound = 0;
114 ret->dim[n].ubound = rex - 1;
115 ret->dim[n].stride = rs;
119 ret->data = internal_malloc_size ( rs * sizeof ('rtype_name`));
120 ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
126 if (unlikely (compile_options.bounds_check))
130 int seen[GFC_MAX_DIMENSIONS];
133 for (n = 0; n < rdim; n++)
136 for (n = 0; n < rdim; n++)
138 v = order->data[n * order->dim[0].stride] - 1;
140 if (v < 0 || v >= rdim)
141 runtime_error("Value %ld out of range in ORDER argument"
142 " to RESHAPE intrinsic", (long int) v + 1);
145 runtime_error("Duplicate value %ld in ORDER argument to"
146 " RESHAPE intrinsic", (long int) v + 1);
154 for (n = 0; n < rdim; n++)
157 dim = order->data[n * order->dim[0].stride] - 1;
162 rstride[n] = ret->dim[dim].stride;
163 rextent[n] = ret->dim[dim].ubound + 1 - ret->dim[dim].lbound;
167 if (rextent[n] != shape_data[dim])
168 runtime_error ("shape and target do not conform");
170 if (rsize == rstride[n])
178 sdim = GFC_DESCRIPTOR_RANK (source);
181 for (n = 0; n < sdim; n++)
184 sstride[n] = source->dim[n].stride;
185 sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
192 if (ssize == sstride[n])
200 pdim = GFC_DESCRIPTOR_RANK (pad);
203 for (n = 0; n < pdim; n++)
206 pstride[n] = pad->dim[n].stride;
207 pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
214 if (psize == pstride[n])
229 if (rsize != 0 && ssize != 0 && psize != 0)
231 rsize *= sizeof ('rtype_name`);
232 ssize *= sizeof ('rtype_name`);
233 psize *= sizeof ('rtype_name`);
234 reshape_packed ((char *)ret->data, rsize, (char *)source->data,
235 ssize, pad ? (char *)pad->data : NULL, psize);
239 src = sptr = source->data;
240 rstride0 = rstride[0];
241 sstride0 = sstride[0];
243 if (sempty && pempty)
248 /* Switch immediately to the pad array. */
252 for (dim = 0; dim < pdim; dim++)
254 scount[dim] = pcount[dim];
255 sextent[dim] = pextent[dim];
256 sstride[dim] = pstride[dim];
257 sstride0 = sstride[0] * sizeof ('rtype_name`);
263 /* Select between the source and pad arrays. */
265 /* Advance to the next element. */
271 /* Advance to the next destination element. */
273 while (rcount[n] == rextent[n])
275 /* When we get to the end of a dimension, reset it and increment
276 the next dimension. */
278 /* We could precalculate these products, but this is a less
279 frequently used path so probably not worth it. */
280 rptr -= rstride[n] * rextent[n];
284 /* Break out of the loop. */
294 /* Advance to the next source element. */
296 while (scount[n] == sextent[n])
298 /* When we get to the end of a dimension, reset it and increment
299 the next dimension. */
301 /* We could precalculate these products, but this is a less
302 frequently used path so probably not worth it. */
303 src -= sstride[n] * sextent[n];
309 /* Switch to the pad array. */
312 for (dim = 0; dim < pdim; dim++)
314 scount[dim] = pcount[dim];
315 sextent[dim] = pextent[dim];
316 sstride[dim] = pstride[dim];
317 sstride0 = sstride[0];
320 /* We now start again from the beginning of the pad array. */