1 /* Generic implementation of the RESHAPE intrinsic
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 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. */
31 #include "libgfortran.h"
36 typedef GFC_ARRAY_DESCRIPTOR(1, index_type
) shape_type
;
37 typedef GFC_ARRAY_DESCRIPTOR(GFC_MAX_DIMENSIONS
, char) parray
;
40 reshape_internal (parray
*ret
, parray
*source
, shape_type
*shape
,
41 parray
*pad
, shape_type
*order
, index_type size
)
43 /* r.* indicates the return array. */
44 index_type rcount
[GFC_MAX_DIMENSIONS
];
45 index_type rextent
[GFC_MAX_DIMENSIONS
];
46 index_type rstride
[GFC_MAX_DIMENSIONS
];
53 /* s.* indicates the source array. */
54 index_type scount
[GFC_MAX_DIMENSIONS
];
55 index_type sextent
[GFC_MAX_DIMENSIONS
];
56 index_type sstride
[GFC_MAX_DIMENSIONS
];
61 /* p.* indicates the pad array. */
62 index_type pcount
[GFC_MAX_DIMENSIONS
];
63 index_type pextent
[GFC_MAX_DIMENSIONS
];
64 index_type pstride
[GFC_MAX_DIMENSIONS
];
72 int sempty
, pempty
, shape_empty
;
73 index_type shape_data
[GFC_MAX_DIMENSIONS
];
75 rdim
= shape
->dim
[0].ubound
- shape
->dim
[0].lbound
+ 1;
76 if (rdim
!= GFC_DESCRIPTOR_RANK(ret
))
77 runtime_error("rank of return array incorrect in RESHAPE intrinsic");
81 for (n
= 0; n
< rdim
; n
++)
83 shape_data
[n
] = shape
->data
[n
* shape
->dim
[0].stride
];
84 if (shape_data
[n
] <= 0)
91 if (ret
->data
== NULL
)
93 rdim
= shape
->dim
[0].ubound
- shape
->dim
[0].lbound
+ 1;
95 for (n
= 0; n
< rdim
; n
++)
97 ret
->dim
[n
].lbound
= 0;
99 ret
->dim
[n
].ubound
= rex
- 1;
100 ret
->dim
[n
].stride
= rs
;
104 ret
->data
= internal_malloc_size ( rs
* size
);
105 ret
->dtype
= (source
->dtype
& ~GFC_DTYPE_RANK_MASK
) | rdim
;
111 if (unlikely (compile_options
.bounds_check
))
113 index_type ret_extent
, source_extent
;
116 for (n
= 0; n
< rdim
; n
++)
119 ret_extent
= ret
->dim
[n
].ubound
+ 1 - ret
->dim
[n
].lbound
;
120 if (ret_extent
!= shape_data
[n
])
121 runtime_error("Incorrect extent in return value of RESHAPE"
122 " intrinsic in dimension %ld: is %ld,"
123 " should be %ld", (long int) n
+1,
124 (long int) ret_extent
, (long int) shape_data
[n
]);
128 sdim
= GFC_DESCRIPTOR_RANK (source
);
129 for (n
= 0; n
< sdim
; n
++)
132 se
= source
->dim
[n
].ubound
+ 1 - source
->dim
[0].lbound
;
133 source_extent
*= se
> 0 ? se
: 0;
136 if (rs
< source_extent
|| (rs
> source_extent
&& !pad
))
137 runtime_error("Incorrect size in SOURCE argument to RESHAPE"
138 " intrinsic: is %ld, should be %ld",
139 (long int) source_extent
, (long int) rs
);
143 int seen
[GFC_MAX_DIMENSIONS
];
146 for (n
= 0; n
< rdim
; n
++)
149 for (n
= 0; n
< rdim
; n
++)
151 v
= order
->data
[n
* order
->dim
[0].stride
] - 1;
153 if (v
< 0 || v
>= rdim
)
154 runtime_error("Value %ld out of range in ORDER argument"
155 " to RESHAPE intrinsic", (long int) v
+ 1);
158 runtime_error("Duplicate value %ld in ORDER argument to"
159 " RESHAPE intrinsic", (long int) v
+ 1);
167 for (n
= 0; n
< rdim
; n
++)
170 dim
= order
->data
[n
* order
->dim
[0].stride
] - 1;
175 rstride
[n
] = ret
->dim
[dim
].stride
;
176 rextent
[n
] = ret
->dim
[dim
].ubound
+ 1 - ret
->dim
[dim
].lbound
;
178 if (rextent
[n
] != shape_data
[dim
])
179 runtime_error ("shape and target do not conform");
181 if (rsize
== rstride
[n
])
189 sdim
= GFC_DESCRIPTOR_RANK (source
);
192 for (n
= 0; n
< sdim
; n
++)
195 sstride
[n
] = source
->dim
[n
].stride
;
196 sextent
[n
] = source
->dim
[n
].ubound
+ 1 - source
->dim
[n
].lbound
;
203 if (ssize
== sstride
[n
])
211 pdim
= GFC_DESCRIPTOR_RANK (pad
);
214 for (n
= 0; n
< pdim
; n
++)
217 pstride
[n
] = pad
->dim
[n
].stride
;
218 pextent
[n
] = pad
->dim
[n
].ubound
+ 1 - pad
->dim
[n
].lbound
;
225 if (psize
== pstride
[n
])
240 if (rsize
!= 0 && ssize
!= 0 && psize
!= 0)
245 reshape_packed (ret
->data
, rsize
, source
->data
, ssize
,
246 pad
? pad
->data
: NULL
, psize
);
250 src
= sptr
= source
->data
;
251 rstride0
= rstride
[0] * size
;
252 sstride0
= sstride
[0] * size
;
254 if (sempty
&& pempty
)
259 /* Pretend we are using the pad array the first time around, too. */
263 for (dim
= 0; dim
< pdim
; dim
++)
265 scount
[dim
] = pcount
[dim
];
266 sextent
[dim
] = pextent
[dim
];
267 sstride
[dim
] = pstride
[dim
];
268 sstride0
= pstride
[0] * size
;
274 /* Select between the source and pad arrays. */
275 memcpy(rptr
, src
, size
);
276 /* Advance to the next element. */
282 /* Advance to the next destination element. */
284 while (rcount
[n
] == rextent
[n
])
286 /* When we get to the end of a dimension, reset it and increment
287 the next dimension. */
289 /* We could precalculate these products, but this is a less
290 frequently used path so probably not worth it. */
291 rptr
-= rstride
[n
] * rextent
[n
] * size
;
295 /* Break out of the loop. */
302 rptr
+= rstride
[n
] * size
;
306 /* Advance to the next source element. */
308 while (scount
[n
] == sextent
[n
])
310 /* When we get to the end of a dimension, reset it and increment
311 the next dimension. */
313 /* We could precalculate these products, but this is a less
314 frequently used path so probably not worth it. */
315 src
-= sstride
[n
] * sextent
[n
] * size
;
321 /* Switch to the pad array. */
324 for (dim
= 0; dim
< pdim
; dim
++)
326 scount
[dim
] = pcount
[dim
];
327 sextent
[dim
] = pextent
[dim
];
328 sstride
[dim
] = pstride
[dim
];
329 sstride0
= sstride
[0] * size
;
332 /* We now start again from the beginning of the pad array. */
339 src
+= sstride
[n
] * size
;
345 extern void reshape (parray
*, parray
*, shape_type
*, parray
*, shape_type
*);
346 export_proto(reshape
);
349 reshape (parray
*ret
, parray
*source
, shape_type
*shape
, parray
*pad
,
352 reshape_internal (ret
, source
, shape
, pad
, order
,
353 GFC_DESCRIPTOR_SIZE (source
));
357 extern void reshape_char (parray
*, gfc_charlen_type
, parray
*, shape_type
*,
358 parray
*, shape_type
*, gfc_charlen_type
,
360 export_proto(reshape_char
);
363 reshape_char (parray
*ret
, gfc_charlen_type ret_length
__attribute__((unused
)),
364 parray
*source
, shape_type
*shape
, parray
*pad
,
365 shape_type
*order
, gfc_charlen_type source_length
,
366 gfc_charlen_type pad_length
__attribute__((unused
)))
368 reshape_internal (ret
, source
, shape
, pad
, order
, source_length
);
372 extern void reshape_char4 (parray
*, gfc_charlen_type
, parray
*, shape_type
*,
373 parray
*, shape_type
*, gfc_charlen_type
,
375 export_proto(reshape_char4
);
378 reshape_char4 (parray
*ret
, gfc_charlen_type ret_length
__attribute__((unused
)),
379 parray
*source
, shape_type
*shape
, parray
*pad
,
380 shape_type
*order
, gfc_charlen_type source_length
,
381 gfc_charlen_type pad_length
__attribute__((unused
)))
383 reshape_internal (ret
, source
, shape
, pad
, order
,
384 source_length
* sizeof (gfc_char4_t
));