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#ifndef SCM_ARRAY_HANDLE_H
#define SCM_ARRAY_HANDLE_H
/* Copyright 1995-1997,1999-2001,2004,2006,2008-2009,2011,2013-2014,2018,2021
Free Software Foundation, Inc.
This file is part of Guile.
Guile 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.
Guile 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 Guile. If not, see
<https://www.gnu.org/licenses/>. */
#include "libguile/error.h"
#include "libguile/inline.h"
#include "libguile/numbers.h"
#include "libguile/arrays.h"
typedef SCM (*scm_t_vector_ref) (SCM, size_t);
typedef void (*scm_t_vector_set) (SCM, size_t, SCM);
typedef enum
{
SCM_ARRAY_ELEMENT_TYPE_SCM = 0, /* SCM values */
SCM_ARRAY_ELEMENT_TYPE_CHAR = 1, /* characters */
SCM_ARRAY_ELEMENT_TYPE_BIT = 2, /* packed numeric values */
SCM_ARRAY_ELEMENT_TYPE_VU8 = 3,
SCM_ARRAY_ELEMENT_TYPE_U8 = 4,
SCM_ARRAY_ELEMENT_TYPE_S8 = 5,
SCM_ARRAY_ELEMENT_TYPE_U16 = 6,
SCM_ARRAY_ELEMENT_TYPE_S16 = 7,
SCM_ARRAY_ELEMENT_TYPE_U32 = 8,
SCM_ARRAY_ELEMENT_TYPE_S32 = 9,
SCM_ARRAY_ELEMENT_TYPE_U64 = 10,
SCM_ARRAY_ELEMENT_TYPE_S64 = 11,
SCM_ARRAY_ELEMENT_TYPE_F32 = 12,
SCM_ARRAY_ELEMENT_TYPE_F64 = 13,
SCM_ARRAY_ELEMENT_TYPE_C32 = 14,
SCM_ARRAY_ELEMENT_TYPE_C64 = 15,
SCM_ARRAY_ELEMENT_TYPE_LAST = 15
} scm_t_array_element_type;
SCM_INTERNAL SCM scm_i_array_element_types[];
typedef struct scm_t_array_handle {
SCM array;
/* `Base' is an offset into elements or writable_elements, corresponding to
the first element in the array. It would be nicer just to adjust the
elements/writable_elements pointer, but we can't because that element might
not even be byte-addressable, as is the case with bitvectors. A nicer
solution would be, well, nice.
*/
size_t base;
size_t ndims; /* ndims == the rank of the array */
scm_t_array_dim *dims;
scm_t_array_dim dim0;
scm_t_array_element_type element_type;
const void *elements;
void *writable_elements;
/* The backing store for the array, and its accessors. */
SCM vector;
scm_t_vector_ref vref;
scm_t_vector_set vset;
} scm_t_array_handle;
#define scm_array_handle_rank(h) ((h)->ndims)
#define scm_array_handle_dims(h) ((h)->dims)
SCM_API void scm_array_get_handle (SCM array, scm_t_array_handle *h);
SCM_API ssize_t scm_array_handle_pos (scm_t_array_handle *h, SCM indices);
SCM_API ssize_t scm_array_handle_pos_1 (scm_t_array_handle *h, ssize_t idx0);
SCM_API ssize_t scm_array_handle_pos_2 (scm_t_array_handle *h, ssize_t idx0, ssize_t idx1);
SCM_API SCM scm_array_handle_element_type (scm_t_array_handle *h);
SCM_API void scm_array_handle_release (scm_t_array_handle *h);
SCM_API const SCM* scm_array_handle_elements (scm_t_array_handle *h);
SCM_API SCM* scm_array_handle_writable_elements (scm_t_array_handle *h);
SCM_INLINE SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos);
SCM_INLINE void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val);
#if SCM_CAN_INLINE || defined SCM_INLINE_C_IMPLEMENTING_INLINES
/* Either inlining, or being included from inline.c. */
SCM_INLINE_IMPLEMENTATION SCM
scm_array_handle_ref (scm_t_array_handle *h, ssize_t p)
{
if (SCM_UNLIKELY (p < 0 && ((size_t)-p) > h->base))
/* catch overflow */
scm_out_of_range (NULL, scm_from_ssize_t (p));
/* perhaps should catch overflow here too */
return h->vref (h->vector, h->base + p);
}
SCM_INLINE_IMPLEMENTATION void
scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v)
{
if (SCM_UNLIKELY (p < 0 && ((size_t)-p) > h->base))
/* catch overflow */
scm_out_of_range (NULL, scm_from_ssize_t (p));
/* perhaps should catch overflow here too */
h->vset (h->vector, h->base + p, v);
}
#endif
SCM_INTERNAL void scm_init_array_handle (void);
#endif /* SCM_ARRAY_HANDLE_H */
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