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Diffstat (limited to 'libguile/array-handle.h')
-rw-r--r-- | libguile/array-handle.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/libguile/array-handle.h b/libguile/array-handle.h new file mode 100644 index 000000000..caf9cefbf --- /dev/null +++ b/libguile/array-handle.h @@ -0,0 +1,129 @@ +/* classes: h_files */ + +#ifndef SCM_ARRAY_HANDLE_H +#define SCM_ARRAY_HANDLE_H + +/* Copyright (C) 1995,1996,1997,1999,2000,2001, 2004, 2006, 2008, 2009 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 + */ + + + +#include "libguile/__scm.h" + + + +struct scm_t_array_handle; + +typedef SCM (*scm_i_t_array_ref) (struct scm_t_array_handle *, size_t); +typedef void (*scm_i_t_array_set) (struct scm_t_array_handle *, size_t, SCM); + +typedef struct +{ + scm_t_bits tag; + scm_t_bits mask; + scm_i_t_array_ref vref; + scm_i_t_array_set vset; + void (*get_handle)(SCM, struct scm_t_array_handle*); +} scm_t_array_implementation; + +#define SCM_ARRAY_IMPLEMENTATION(tag_,mask_,vref_,vset_,handle_) \ + SCM_SNARF_INIT ({ \ + scm_t_array_implementation impl; \ + impl.tag = tag_; impl.mask = mask_; \ + impl.vref = vref_; impl.vset = vset_; \ + impl.get_handle = handle_; \ + scm_i_register_array_implementation (&impl); \ + }) + + +SCM_INTERNAL void scm_i_register_array_implementation (scm_t_array_implementation *impl); +SCM_INTERNAL scm_t_array_implementation* scm_i_array_implementation_for_obj (SCM obj); + + + + +typedef struct scm_t_array_dim +{ + ssize_t lbnd; + ssize_t ubnd; + ssize_t inc; +} scm_t_array_dim; + +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; + scm_t_array_implementation *impl; + /* `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; +} 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 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); + +/* See inline.h for scm_array_handle_ref and scm_array_handle_set */ + +SCM_INTERNAL void scm_init_array_handle (void); + + +#endif /* SCM_ARRAY_HANDLE_H */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |