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Diffstat (limited to 'libgfortran/intrinsics/unpack_generic.c')
| -rw-r--r-- | libgfortran/intrinsics/unpack_generic.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/unpack_generic.c b/libgfortran/intrinsics/unpack_generic.c new file mode 100644 index 00000000000..3d02a3e6060 --- /dev/null +++ b/libgfortran/intrinsics/unpack_generic.c @@ -0,0 +1,154 @@ +/* Generic implementation of the RESHAPE intrinsic + Copyright 2002 Free Software Foundation, Inc. + Contributed by Paul Brook <paul@nowt.org> + +This file is part of the GNU Fortran 95 runtime library (libgfor). + +Libgfor is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +Ligbfor 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 Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with libgfor; see the file COPYING.LIB. If not, +write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "config.h" +#include <stdlib.h> +#include <assert.h> +#include <string.h> +#include "libgfortran.h" + +void +__unpack1 (const gfc_array_char * ret, const gfc_array_char * vector, + const gfc_array_l4 * mask, const gfc_array_char * field) +{ + /* r.* indicates the return array. */ + index_type rstride[GFC_MAX_DIMENSIONS]; + index_type rstride0; + char *rptr; + /* v.* indicates the vector array. */ + index_type vstride0; + char *vptr; + /* f.* indicates the field array. */ + index_type fstride[GFC_MAX_DIMENSIONS]; + index_type fstride0; + const char *fptr; + /* m.* indicates the mask array. */ + index_type mstride[GFC_MAX_DIMENSIONS]; + index_type mstride0; + const GFC_LOGICAL_4 *mptr; + + index_type count[GFC_MAX_DIMENSIONS]; + index_type extent[GFC_MAX_DIMENSIONS]; + index_type n; + index_type dim; + index_type size; + index_type fsize; + + size = GFC_DESCRIPTOR_SIZE (ret); + /* A field element size of 0 actually means this is a scalar. */ + fsize = GFC_DESCRIPTOR_SIZE (field); + dim = GFC_DESCRIPTOR_RANK (ret); + for (n = 0; n < dim; n++) + { + count[n] = 0; + extent[n] = ret->dim[n].ubound + 1 - ret->dim[n].lbound; + rstride[n] = ret->dim[n].stride * size; + fstride[n] = field->dim[n].stride * fsize; + mstride[n] = mask->dim[n].stride; + } + if (rstride[0] == 0) + rstride[0] = size; + if (fstride[0] == 0) + fstride[0] = fsize; + if (mstride[0] == 0) + mstride[0] = 1; + + vstride0 = vector->dim[0].stride * size; + if (vstride0 == 0) + vstride0 = size; + rstride0 = rstride[0]; + fstride0 = fstride[0]; + mstride0 = mstride[0]; + rptr = ret->data; + fptr = field->data; + mptr = mask->data; + vptr = vector->data; + + + /* Use the same loop for both logical types. */ + if (GFC_DESCRIPTOR_SIZE (mask) != 4) + { + if (GFC_DESCRIPTOR_SIZE (mask) != 8) + runtime_error ("Funny sized logical array"); + for (n = 0; n < dim; n++) + mstride[n] <<= 1; + mstride0 <<= 1; + mptr = GFOR_POINTER_L8_TO_L4 (mptr); + } + + while (rptr) + { + if (*mptr) + { + /* From vector. */ + memcpy (rptr, vptr, size); + vptr += vstride0; + } + else + { + /* From field. */ + memcpy (rptr, fptr, size); + } + /* Advance to the next element. */ + rptr += rstride0; + fptr += fstride0; + mptr += mstride0; + 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 proabably not worth it. */ + rptr -= rstride[n] * extent[n]; + fptr -= fstride[n] * extent[n]; + mptr -= mstride[n] * extent[n]; + n++; + if (n >= dim) + { + /* Break out of the loop. */ + rptr = NULL; + break; + } + else + { + count[n]++; + rptr += rstride[n]; + fptr += fstride[n]; + mptr += mstride[n]; + } + } + } +} + +void +__unpack0 (const gfc_array_char * ret, const gfc_array_char * vector, + const gfc_array_l4 * mask, char * field) +{ + gfc_array_char tmp; + + tmp.dtype = 0; + tmp.data = field; + __unpack1 (ret, vector, mask, &tmp); +} + |