| `/* Implementation of the CSHIFT intrinsic |
| Copyright 2003, 2007, 2009 Free Software Foundation, Inc. |
| Contributed by Feng Wang <wf_cs@yahoo.com> |
| |
| This file is part of the GNU Fortran 95 runtime library (libgfortran). |
| |
| Libgfortran is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public |
| License as published by the Free Software Foundation; either |
| version 3 of the License, or (at your option) any later version. |
| |
| Ligbfortran is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "libgfortran.h" |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <string.h>' |
| |
| include(iparm.m4)dnl |
| |
| `#if defined (HAVE_'atype_name`) |
| |
| static void |
| cshift1 (gfc_array_char * const restrict ret, |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich, |
| index_type size) |
| { |
| /* r.* indicates the return array. */ |
| index_type rstride[GFC_MAX_DIMENSIONS]; |
| index_type rstride0; |
| index_type roffset; |
| char *rptr; |
| char *dest; |
| /* s.* indicates the source array. */ |
| index_type sstride[GFC_MAX_DIMENSIONS]; |
| index_type sstride0; |
| index_type soffset; |
| const char *sptr; |
| const char *src; |
| /* h.* indicates the shift array. */ |
| index_type hstride[GFC_MAX_DIMENSIONS]; |
| index_type hstride0; |
| const 'atype_name` *hptr; |
| |
| index_type count[GFC_MAX_DIMENSIONS]; |
| index_type extent[GFC_MAX_DIMENSIONS]; |
| index_type dim; |
| index_type len; |
| index_type n; |
| int which; |
| 'atype_name` sh; |
| index_type arraysize; |
| |
| if (pwhich) |
| which = *pwhich - 1; |
| else |
| which = 0; |
| |
| if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array)) |
| runtime_error ("Argument ''`DIM''` is out of range in call to ''`CSHIFT''`"); |
| |
| arraysize = size0 ((array_t *)array); |
| |
| if (ret->data == NULL) |
| { |
| int i; |
| |
| ret->data = internal_malloc_size (size * arraysize); |
| ret->offset = 0; |
| ret->dtype = array->dtype; |
| for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++) |
| { |
| ret->dim[i].lbound = 0; |
| ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound; |
| |
| if (i == 0) |
| ret->dim[i].stride = 1; |
| else |
| ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride; |
| } |
| } |
| |
| if (arraysize == 0) |
| return; |
| |
| extent[0] = 1; |
| count[0] = 0; |
| n = 0; |
| |
| /* Initialized for avoiding compiler warnings. */ |
| roffset = size; |
| soffset = size; |
| len = 0; |
| |
| for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) |
| { |
| if (dim == which) |
| { |
| roffset = ret->dim[dim].stride * size; |
| if (roffset == 0) |
| roffset = size; |
| soffset = array->dim[dim].stride * size; |
| if (soffset == 0) |
| soffset = size; |
| len = array->dim[dim].ubound + 1 - array->dim[dim].lbound; |
| } |
| else |
| { |
| count[n] = 0; |
| extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound; |
| rstride[n] = ret->dim[dim].stride * size; |
| sstride[n] = array->dim[dim].stride * size; |
| |
| hstride[n] = h->dim[n].stride; |
| n++; |
| } |
| } |
| if (sstride[0] == 0) |
| sstride[0] = size; |
| if (rstride[0] == 0) |
| rstride[0] = size; |
| if (hstride[0] == 0) |
| hstride[0] = 1; |
| |
| dim = GFC_DESCRIPTOR_RANK (array); |
| rstride0 = rstride[0]; |
| sstride0 = sstride[0]; |
| hstride0 = hstride[0]; |
| rptr = ret->data; |
| sptr = array->data; |
| hptr = h->data; |
| |
| while (rptr) |
| { |
| /* Do the shift for this dimension. */ |
| sh = *hptr; |
| sh = (div (sh, len)).rem; |
| if (sh < 0) |
| sh += len; |
| |
| src = &sptr[sh * soffset]; |
| dest = rptr; |
| |
| for (n = 0; n < len; n++) |
| { |
| memcpy (dest, src, size); |
| dest += roffset; |
| if (n == len - sh - 1) |
| src = sptr; |
| else |
| src += soffset; |
| } |
| |
| /* Advance to the next section. */ |
| rptr += rstride0; |
| sptr += sstride0; |
| hptr += hstride0; |
| count[0]++; |
| n = 0; |
| while (count[n] == extent[n]) |
| { |
| /* When we get to the end of a dimension, reset it and increment |
| the next dimension. */ |
| count[n] = 0; |
| /* We could precalculate these products, but this is a less |
| frequently used path so probably not worth it. */ |
| rptr -= rstride[n] * extent[n]; |
| sptr -= sstride[n] * extent[n]; |
| hptr -= hstride[n] * extent[n]; |
| n++; |
| if (n >= dim - 1) |
| { |
| /* Break out of the loop. */ |
| rptr = NULL; |
| break; |
| } |
| else |
| { |
| count[n]++; |
| rptr += rstride[n]; |
| sptr += sstride[n]; |
| hptr += hstride[n]; |
| } |
| } |
| } |
| } |
| |
| void cshift1_'atype_kind` (gfc_array_char * const restrict, |
| const gfc_array_char * const restrict, |
| const 'atype` * const restrict, |
| const 'atype_name` * const restrict); |
| export_proto(cshift1_'atype_kind`); |
| |
| void |
| cshift1_'atype_kind` (gfc_array_char * const restrict ret, |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich) |
| { |
| cshift1 (ret, array, h, pwhich, GFC_DESCRIPTOR_SIZE (array)); |
| } |
| |
| |
| void cshift1_'atype_kind`_char (gfc_array_char * const restrict ret, |
| GFC_INTEGER_4, |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich, |
| GFC_INTEGER_4); |
| export_proto(cshift1_'atype_kind`_char); |
| |
| void |
| cshift1_'atype_kind`_char (gfc_array_char * const restrict ret, |
| GFC_INTEGER_4 ret_length __attribute__((unused)), |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich, |
| GFC_INTEGER_4 array_length) |
| { |
| cshift1 (ret, array, h, pwhich, array_length); |
| } |
| |
| |
| void cshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret, |
| GFC_INTEGER_4, |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich, |
| GFC_INTEGER_4); |
| export_proto(cshift1_'atype_kind`_char4); |
| |
| void |
| cshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret, |
| GFC_INTEGER_4 ret_length __attribute__((unused)), |
| const gfc_array_char * const restrict array, |
| const 'atype` * const restrict h, |
| const 'atype_name` * const restrict pwhich, |
| GFC_INTEGER_4 array_length) |
| { |
| cshift1 (ret, array, h, pwhich, array_length * sizeof (gfc_char4_t)); |
| } |
| |
| #endif' |