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/* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003,2004, 2005, 2006, 2009, 2013 Free Software Foundation, Inc.
*
* This library 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 3 of
* the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "libguile/_scm.h"
#include "libguile/__scm.h"
#include "libguile/array-handle.h"
SCM scm_i_array_element_types[SCM_ARRAY_ELEMENT_TYPE_LAST + 1];
#define ARRAY_IMPLS_N_STATIC_ALLOC 7
static scm_t_array_implementation array_impls[ARRAY_IMPLS_N_STATIC_ALLOC];
static int num_array_impls_registered = 0;
void
scm_i_register_array_implementation (scm_t_array_implementation *impl)
{
if (num_array_impls_registered >= ARRAY_IMPLS_N_STATIC_ALLOC)
/* need to increase ARRAY_IMPLS_N_STATIC_ALLOC, buster */
abort ();
else
array_impls[num_array_impls_registered++] = *impl;
}
scm_t_array_implementation*
scm_i_array_implementation_for_obj (SCM obj)
{
int i;
for (i = 0; i < num_array_impls_registered; i++)
if (SCM_NIMP (obj)
&& (SCM_CELL_TYPE (obj) & array_impls[i].mask) == array_impls[i].tag)
return &array_impls[i];
return NULL;
}
void
scm_array_get_handle (SCM array, scm_t_array_handle *h)
{
scm_t_array_implementation *impl = scm_i_array_implementation_for_obj (array);
if (!impl)
scm_wrong_type_arg_msg (NULL, 0, array, "array");
h->array = array;
h->impl = impl;
h->base = 0;
h->ndims = 0;
h->dims = NULL;
h->element_type = SCM_ARRAY_ELEMENT_TYPE_SCM; /* have to default to
something... */
h->elements = NULL;
h->writable_elements = NULL;
h->impl->get_handle (array, h);
}
ssize_t
scm_array_handle_pos (scm_t_array_handle *h, SCM indices)
{
scm_t_array_dim *s = scm_array_handle_dims (h);
ssize_t pos = 0, i;
size_t k = scm_array_handle_rank (h);
while (k > 0 && scm_is_pair (indices))
{
i = scm_to_signed_integer (SCM_CAR (indices), s->lbnd, s->ubnd);
pos += (i - s->lbnd) * s->inc;
k--;
s++;
indices = SCM_CDR (indices);
}
if (k > 0 || !scm_is_null (indices))
scm_misc_error (NULL, "wrong number of indices, expecting ~a",
scm_list_1 (scm_from_size_t (scm_array_handle_rank (h))));
return pos;
}
static void
check_array_index_bounds (scm_t_array_dim *dim, ssize_t idx)
{
if (idx < dim->lbnd || idx > dim->ubnd)
scm_error (scm_out_of_range_key, NULL, "Value out of range ~S to ~S: ~S",
scm_list_3 (scm_from_ssize_t (dim->lbnd),
scm_from_ssize_t (dim->ubnd),
scm_from_ssize_t (idx)),
scm_list_1 (scm_from_ssize_t (idx)));
}
ssize_t
scm_array_handle_pos_1 (scm_t_array_handle *h, ssize_t idx0)
{
scm_t_array_dim *dim = scm_array_handle_dims (h);
if (scm_array_handle_rank (h) != 1)
scm_misc_error (NULL, "wrong number of indices, expecting ~A",
scm_list_1 (scm_from_size_t (scm_array_handle_rank (h))));
check_array_index_bounds (&dim[0], idx0);
return (idx0 - dim[0].lbnd) * dim[0].inc;
}
ssize_t
scm_array_handle_pos_2 (scm_t_array_handle *h, ssize_t idx0, ssize_t idx1)
{
scm_t_array_dim *dim = scm_array_handle_dims (h);
if (scm_array_handle_rank (h) != 2)
scm_misc_error (NULL, "wrong number of indices, expecting ~A",
scm_list_1 (scm_from_size_t (scm_array_handle_rank (h))));
check_array_index_bounds (&dim[0], idx0);
check_array_index_bounds (&dim[1], idx1);
return ((idx0 - dim[0].lbnd) * dim[0].inc
+ (idx1 - dim[1].lbnd) * dim[1].inc);
}
SCM
scm_array_handle_element_type (scm_t_array_handle *h)
{
if (h->element_type < 0 || h->element_type > SCM_ARRAY_ELEMENT_TYPE_LAST)
abort (); /* guile programming error */
return scm_i_array_element_types[h->element_type];
}
void
scm_array_handle_release (scm_t_array_handle *h)
{
/* Nothing to do here until arrays need to be reserved for real.
*/
}
const SCM *
scm_array_handle_elements (scm_t_array_handle *h)
{
if (h->element_type != SCM_ARRAY_ELEMENT_TYPE_SCM)
scm_wrong_type_arg_msg (NULL, 0, h->array, "non-uniform array");
return ((const SCM*)h->elements) + h->base;
}
SCM *
scm_array_handle_writable_elements (scm_t_array_handle *h)
{
if (h->element_type != SCM_ARRAY_ELEMENT_TYPE_SCM)
scm_wrong_type_arg_msg (NULL, 0, h->array, "non-uniform array");
return ((SCM*)h->elements) + h->base;
}
void
scm_init_array_handle (void)
{
#define DEFINE_ARRAY_TYPE(tag, TAG) \
scm_i_array_element_types[SCM_ARRAY_ELEMENT_TYPE_##TAG] = scm_from_locale_symbol (#tag)
scm_i_array_element_types[SCM_ARRAY_ELEMENT_TYPE_SCM] = SCM_BOOL_T;
DEFINE_ARRAY_TYPE (a, CHAR);
DEFINE_ARRAY_TYPE (b, BIT);
DEFINE_ARRAY_TYPE (vu8, VU8);
DEFINE_ARRAY_TYPE (u8, U8);
DEFINE_ARRAY_TYPE (s8, S8);
DEFINE_ARRAY_TYPE (u16, U16);
DEFINE_ARRAY_TYPE (s16, S16);
DEFINE_ARRAY_TYPE (u32, U32);
DEFINE_ARRAY_TYPE (s32, S32);
DEFINE_ARRAY_TYPE (u64, U64);
DEFINE_ARRAY_TYPE (s64, S64);
DEFINE_ARRAY_TYPE (f32, F32);
DEFINE_ARRAY_TYPE (f64, F64);
DEFINE_ARRAY_TYPE (c32, C32);
DEFINE_ARRAY_TYPE (c64, C64);
#include "libguile/array-handle.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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