Commit | Line | Data |
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03976fee | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003,2004, 2005, 2006, 2009, 2010, 2011 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd JB |
20 | \f |
21 | ||
dbb605f5 | 22 | #ifdef HAVE_CONFIG_H |
2a5cd898 RB |
23 | # include <config.h> |
24 | #endif | |
25 | ||
0f2d19dd | 26 | #include <stdio.h> |
e6e2e95a | 27 | #include <errno.h> |
783e7774 | 28 | #include <string.h> |
e6e2e95a | 29 | |
a0599745 | 30 | #include "libguile/_scm.h" |
e0e49670 MV |
31 | #include "libguile/__scm.h" |
32 | #include "libguile/eq.h" | |
a0599745 MD |
33 | #include "libguile/chars.h" |
34 | #include "libguile/eval.h" | |
35 | #include "libguile/fports.h" | |
36 | #include "libguile/smob.h" | |
a0599745 MD |
37 | #include "libguile/feature.h" |
38 | #include "libguile/root.h" | |
39 | #include "libguile/strings.h" | |
c44ca4fe | 40 | #include "libguile/srfi-13.h" |
e0e49670 | 41 | #include "libguile/srfi-4.h" |
a0599745 | 42 | #include "libguile/vectors.h" |
cf396142 | 43 | #include "libguile/bitvectors.h" |
438974d0 | 44 | #include "libguile/bytevectors.h" |
bfad4005 | 45 | #include "libguile/list.h" |
d44ff083 | 46 | #include "libguile/dynwind.h" |
943a0a87 | 47 | #include "libguile/read.h" |
a0599745 MD |
48 | |
49 | #include "libguile/validate.h" | |
2fa901a5 | 50 | #include "libguile/arrays.h" |
943a0a87 | 51 | #include "libguile/array-map.h" |
f332e957 | 52 | #include "libguile/generalized-vectors.h" |
943a0a87 | 53 | #include "libguile/generalized-arrays.h" |
476b894c | 54 | #include "libguile/uniform.h" |
0f2d19dd | 55 | |
0f2d19dd | 56 | |
04b87de5 | 57 | scm_t_bits scm_i_tc16_array; |
04b87de5 | 58 | #define SCM_SET_ARRAY_CONTIGUOUS_FLAG(x) \ |
c395cb78 | 59 | (SCM_SET_SMOB_FLAGS ((x), SCM_SMOB_FLAGS (x) | SCM_I_ARRAY_FLAG_CONTIGUOUS)) |
04b87de5 | 60 | #define SCM_CLR_ARRAY_CONTIGUOUS_FLAG(x) \ |
c395cb78 | 61 | (SCM_SET_SMOB_FLAGS ((x), SCM_SMOB_FLAGS (x) & ~SCM_I_ARRAY_FLAG_CONTIGUOUS)) |
1cc91f1b | 62 | |
0f2d19dd | 63 | |
e2d37336 MD |
64 | SCM_DEFINE (scm_shared_array_root, "shared-array-root", 1, 0, 0, |
65 | (SCM ra), | |
66 | "Return the root vector of a shared array.") | |
67 | #define FUNC_NAME s_scm_shared_array_root | |
68 | { | |
66b9d7d3 | 69 | if (SCM_I_ARRAYP (ra)) |
04b87de5 | 70 | return SCM_I_ARRAY_V (ra); |
52372719 MV |
71 | else if (scm_is_generalized_vector (ra)) |
72 | return ra; | |
943a0a87 | 73 | scm_wrong_type_arg_msg (FUNC_NAME, SCM_ARG1, ra, "array"); |
e2d37336 MD |
74 | } |
75 | #undef FUNC_NAME | |
76 | ||
77 | ||
78 | SCM_DEFINE (scm_shared_array_offset, "shared-array-offset", 1, 0, 0, | |
79 | (SCM ra), | |
80 | "Return the root vector index of the first element in the array.") | |
81 | #define FUNC_NAME s_scm_shared_array_offset | |
82 | { | |
52372719 MV |
83 | scm_t_array_handle handle; |
84 | SCM res; | |
85 | ||
86 | scm_array_get_handle (ra, &handle); | |
87 | res = scm_from_size_t (handle.base); | |
88 | scm_array_handle_release (&handle); | |
89 | return res; | |
e2d37336 MD |
90 | } |
91 | #undef FUNC_NAME | |
92 | ||
93 | ||
94 | SCM_DEFINE (scm_shared_array_increments, "shared-array-increments", 1, 0, 0, | |
95 | (SCM ra), | |
96 | "For each dimension, return the distance between elements in the root vector.") | |
97 | #define FUNC_NAME s_scm_shared_array_increments | |
98 | { | |
52372719 | 99 | scm_t_array_handle handle; |
e2d37336 | 100 | SCM res = SCM_EOL; |
1be6b49c | 101 | size_t k; |
92c2555f | 102 | scm_t_array_dim *s; |
02339e5b | 103 | |
52372719 MV |
104 | scm_array_get_handle (ra, &handle); |
105 | k = scm_array_handle_rank (&handle); | |
106 | s = scm_array_handle_dims (&handle); | |
e2d37336 | 107 | while (k--) |
52372719 MV |
108 | res = scm_cons (scm_from_ssize_t (s[k].inc), res); |
109 | scm_array_handle_release (&handle); | |
e2d37336 MD |
110 | return res; |
111 | } | |
112 | #undef FUNC_NAME | |
113 | ||
0cd6cb2f | 114 | SCM |
66b9d7d3 | 115 | scm_i_make_array (int ndim) |
0f2d19dd JB |
116 | { |
117 | SCM ra; | |
66b9d7d3 | 118 | SCM_NEWSMOB(ra, ((scm_t_bits) ndim << 17) + scm_i_tc16_array, |
04b87de5 | 119 | scm_gc_malloc ((sizeof (scm_i_t_array) + |
4c9419ac MV |
120 | ndim * sizeof (scm_t_array_dim)), |
121 | "array")); | |
04b87de5 | 122 | SCM_I_ARRAY_V (ra) = SCM_BOOL_F; |
0f2d19dd JB |
123 | return ra; |
124 | } | |
125 | ||
126 | static char s_bad_spec[] = "Bad scm_array dimension"; | |
0f2d19dd | 127 | |
1cc91f1b | 128 | |
02339e5b MV |
129 | /* Increments will still need to be set. */ |
130 | ||
0cd6cb2f MV |
131 | static SCM |
132 | scm_i_shap2ra (SCM args) | |
0f2d19dd | 133 | { |
92c2555f | 134 | scm_t_array_dim *s; |
0f2d19dd JB |
135 | SCM ra, spec, sp; |
136 | int ndim = scm_ilength (args); | |
b3fcac34 | 137 | if (ndim < 0) |
0cd6cb2f | 138 | scm_misc_error (NULL, s_bad_spec, SCM_EOL); |
b3fcac34 | 139 | |
66b9d7d3 | 140 | ra = scm_i_make_array (ndim); |
04b87de5 MV |
141 | SCM_I_ARRAY_BASE (ra) = 0; |
142 | s = SCM_I_ARRAY_DIMS (ra); | |
d2e53ed6 | 143 | for (; !scm_is_null (args); s++, args = SCM_CDR (args)) |
0f2d19dd JB |
144 | { |
145 | spec = SCM_CAR (args); | |
e11e83f3 | 146 | if (scm_is_integer (spec)) |
0f2d19dd | 147 | { |
e11e83f3 | 148 | if (scm_to_long (spec) < 0) |
0cd6cb2f | 149 | scm_misc_error (NULL, s_bad_spec, SCM_EOL); |
0f2d19dd | 150 | s->lbnd = 0; |
e11e83f3 | 151 | s->ubnd = scm_to_long (spec) - 1; |
0f2d19dd JB |
152 | s->inc = 1; |
153 | } | |
154 | else | |
155 | { | |
d2e53ed6 | 156 | if (!scm_is_pair (spec) || !scm_is_integer (SCM_CAR (spec))) |
0cd6cb2f | 157 | scm_misc_error (NULL, s_bad_spec, SCM_EOL); |
e11e83f3 | 158 | s->lbnd = scm_to_long (SCM_CAR (spec)); |
0f2d19dd | 159 | sp = SCM_CDR (spec); |
d2e53ed6 | 160 | if (!scm_is_pair (sp) |
e11e83f3 | 161 | || !scm_is_integer (SCM_CAR (sp)) |
d2e53ed6 | 162 | || !scm_is_null (SCM_CDR (sp))) |
0cd6cb2f | 163 | scm_misc_error (NULL, s_bad_spec, SCM_EOL); |
e11e83f3 | 164 | s->ubnd = scm_to_long (SCM_CAR (sp)); |
0f2d19dd JB |
165 | s->inc = 1; |
166 | } | |
167 | } | |
168 | return ra; | |
169 | } | |
170 | ||
f301dbf3 MV |
171 | SCM_DEFINE (scm_make_typed_array, "make-typed-array", 2, 0, 1, |
172 | (SCM type, SCM fill, SCM bounds), | |
173 | "Create and return an array of type @var{type}.") | |
174 | #define FUNC_NAME s_scm_make_typed_array | |
0f2d19dd | 175 | { |
f301dbf3 | 176 | size_t k, rlen = 1; |
92c2555f | 177 | scm_t_array_dim *s; |
0f2d19dd | 178 | SCM ra; |
1be6b49c | 179 | |
0cd6cb2f | 180 | ra = scm_i_shap2ra (bounds); |
e038c042 | 181 | SCM_SET_ARRAY_CONTIGUOUS_FLAG (ra); |
04b87de5 MV |
182 | s = SCM_I_ARRAY_DIMS (ra); |
183 | k = SCM_I_ARRAY_NDIM (ra); | |
1be6b49c | 184 | |
0f2d19dd JB |
185 | while (k--) |
186 | { | |
a3a32939 | 187 | s[k].inc = rlen; |
2caaadd1 | 188 | SCM_ASSERT_RANGE (1, bounds, s[k].lbnd <= s[k].ubnd + 1); |
0f2d19dd | 189 | rlen = (s[k].ubnd - s[k].lbnd + 1) * s[k].inc; |
0f2d19dd | 190 | } |
a3a32939 | 191 | |
f0b91039 | 192 | if (scm_is_eq (fill, SCM_UNSPECIFIED)) |
f301dbf3 | 193 | fill = SCM_UNDEFINED; |
a3a32939 | 194 | |
943a0a87 AW |
195 | SCM_I_ARRAY_V (ra) = |
196 | scm_make_generalized_vector (type, scm_from_size_t (rlen), fill); | |
a3a32939 | 197 | |
04b87de5 | 198 | if (1 == SCM_I_ARRAY_NDIM (ra) && 0 == SCM_I_ARRAY_BASE (ra)) |
c014a02e | 199 | if (s->ubnd < s->lbnd || (0 == s->lbnd && 1 == s->inc)) |
04b87de5 | 200 | return SCM_I_ARRAY_V (ra); |
0f2d19dd JB |
201 | return ra; |
202 | } | |
1bbd0b84 | 203 | #undef FUNC_NAME |
0f2d19dd | 204 | |
782a82ee AW |
205 | SCM |
206 | scm_from_contiguous_typed_array (SCM type, SCM bounds, const void *bytes, | |
207 | size_t byte_len) | |
208 | #define FUNC_NAME "scm_from_contiguous_typed_array" | |
209 | { | |
210 | size_t k, rlen = 1; | |
211 | scm_t_array_dim *s; | |
782a82ee AW |
212 | SCM ra; |
213 | scm_t_array_handle h; | |
f5a51cae | 214 | void *elts; |
782a82ee AW |
215 | size_t sz; |
216 | ||
782a82ee AW |
217 | ra = scm_i_shap2ra (bounds); |
218 | SCM_SET_ARRAY_CONTIGUOUS_FLAG (ra); | |
219 | s = SCM_I_ARRAY_DIMS (ra); | |
220 | k = SCM_I_ARRAY_NDIM (ra); | |
221 | ||
222 | while (k--) | |
223 | { | |
224 | s[k].inc = rlen; | |
225 | SCM_ASSERT_RANGE (1, bounds, s[k].lbnd <= s[k].ubnd + 1); | |
226 | rlen = (s[k].ubnd - s[k].lbnd + 1) * s[k].inc; | |
227 | } | |
943a0a87 AW |
228 | SCM_I_ARRAY_V (ra) = |
229 | scm_make_generalized_vector (type, scm_from_size_t (rlen), SCM_UNDEFINED); | |
782a82ee AW |
230 | |
231 | ||
232 | scm_array_get_handle (ra, &h); | |
f5a51cae AW |
233 | elts = h.writable_elements; |
234 | sz = scm_array_handle_uniform_element_bit_size (&h); | |
782a82ee AW |
235 | scm_array_handle_release (&h); |
236 | ||
f5a51cae AW |
237 | if (sz >= 8 && ((sz % 8) == 0)) |
238 | { | |
239 | if (byte_len % (sz / 8)) | |
240 | SCM_MISC_ERROR ("byte length not a multiple of the unit size", SCM_EOL); | |
241 | if (byte_len / (sz / 8) != rlen) | |
242 | SCM_MISC_ERROR ("byte length and dimensions do not match", SCM_EOL); | |
243 | } | |
b0fae4ec | 244 | else if (sz < 8) |
f5a51cae | 245 | { |
cd48c32c LC |
246 | /* byte_len ?= ceil (rlen * sz / 8) */ |
247 | if (byte_len != (rlen * sz + 7) / 8) | |
f5a51cae AW |
248 | SCM_MISC_ERROR ("byte length and dimensions do not match", SCM_EOL); |
249 | } | |
b0fae4ec AW |
250 | else |
251 | /* an internal guile error, really */ | |
252 | SCM_MISC_ERROR ("uniform elements larger than 8 bits must fill whole bytes", SCM_EOL); | |
782a82ee | 253 | |
f5a51cae | 254 | memcpy (elts, bytes, byte_len); |
782a82ee AW |
255 | |
256 | if (1 == SCM_I_ARRAY_NDIM (ra) && 0 == SCM_I_ARRAY_BASE (ra)) | |
257 | if (s->ubnd < s->lbnd || (0 == s->lbnd && 1 == s->inc)) | |
258 | return SCM_I_ARRAY_V (ra); | |
259 | return ra; | |
260 | } | |
261 | #undef FUNC_NAME | |
262 | ||
73788ca8 AW |
263 | SCM |
264 | scm_from_contiguous_array (SCM bounds, const SCM *elts, size_t len) | |
265 | #define FUNC_NAME "scm_from_contiguous_array" | |
266 | { | |
267 | size_t k, rlen = 1; | |
268 | scm_t_array_dim *s; | |
269 | SCM ra; | |
270 | scm_t_array_handle h; | |
271 | ||
272 | ra = scm_i_shap2ra (bounds); | |
273 | SCM_SET_ARRAY_CONTIGUOUS_FLAG (ra); | |
274 | s = SCM_I_ARRAY_DIMS (ra); | |
275 | k = SCM_I_ARRAY_NDIM (ra); | |
276 | ||
277 | while (k--) | |
278 | { | |
279 | s[k].inc = rlen; | |
280 | SCM_ASSERT_RANGE (1, bounds, s[k].lbnd <= s[k].ubnd + 1); | |
281 | rlen = (s[k].ubnd - s[k].lbnd + 1) * s[k].inc; | |
282 | } | |
283 | if (rlen != len) | |
284 | SCM_MISC_ERROR ("element length and dimensions do not match", SCM_EOL); | |
285 | ||
286 | SCM_I_ARRAY_V (ra) = scm_c_make_vector (rlen, SCM_UNDEFINED); | |
287 | scm_array_get_handle (ra, &h); | |
288 | memcpy (h.writable_elements, elts, rlen * sizeof(SCM)); | |
289 | scm_array_handle_release (&h); | |
290 | ||
291 | if (1 == SCM_I_ARRAY_NDIM (ra) && 0 == SCM_I_ARRAY_BASE (ra)) | |
292 | if (s->ubnd < s->lbnd || (0 == s->lbnd && 1 == s->inc)) | |
293 | return SCM_I_ARRAY_V (ra); | |
294 | return ra; | |
295 | } | |
296 | #undef FUNC_NAME | |
297 | ||
f301dbf3 MV |
298 | SCM_DEFINE (scm_make_array, "make-array", 1, 0, 1, |
299 | (SCM fill, SCM bounds), | |
300 | "Create and return an array.") | |
301 | #define FUNC_NAME s_scm_make_array | |
302 | { | |
303 | return scm_make_typed_array (SCM_BOOL_T, fill, bounds); | |
304 | } | |
305 | #undef FUNC_NAME | |
306 | ||
0cd6cb2f MV |
307 | static void |
308 | scm_i_ra_set_contp (SCM ra) | |
0f2d19dd | 309 | { |
04b87de5 | 310 | size_t k = SCM_I_ARRAY_NDIM (ra); |
0f2d19dd | 311 | if (k) |
0f2d19dd | 312 | { |
04b87de5 | 313 | long inc = SCM_I_ARRAY_DIMS (ra)[k - 1].inc; |
fe0c6dae | 314 | while (k--) |
0f2d19dd | 315 | { |
04b87de5 | 316 | if (inc != SCM_I_ARRAY_DIMS (ra)[k].inc) |
fe0c6dae | 317 | { |
e038c042 | 318 | SCM_CLR_ARRAY_CONTIGUOUS_FLAG (ra); |
fe0c6dae JB |
319 | return; |
320 | } | |
04b87de5 MV |
321 | inc *= (SCM_I_ARRAY_DIMS (ra)[k].ubnd |
322 | - SCM_I_ARRAY_DIMS (ra)[k].lbnd + 1); | |
0f2d19dd | 323 | } |
0f2d19dd | 324 | } |
e038c042 | 325 | SCM_SET_ARRAY_CONTIGUOUS_FLAG (ra); |
0f2d19dd JB |
326 | } |
327 | ||
328 | ||
3b3b36dd | 329 | SCM_DEFINE (scm_make_shared_array, "make-shared-array", 2, 0, 1, |
1bbd0b84 | 330 | (SCM oldra, SCM mapfunc, SCM dims), |
b380b885 MD |
331 | "@code{make-shared-array} can be used to create shared subarrays of other\n" |
332 | "arrays. The @var{mapper} is a function that translates coordinates in\n" | |
333 | "the new array into coordinates in the old array. A @var{mapper} must be\n" | |
334 | "linear, and its range must stay within the bounds of the old array, but\n" | |
335 | "it can be otherwise arbitrary. A simple example:\n" | |
1e6808ea | 336 | "@lisp\n" |
b380b885 MD |
337 | "(define fred (make-array #f 8 8))\n" |
338 | "(define freds-diagonal\n" | |
339 | " (make-shared-array fred (lambda (i) (list i i)) 8))\n" | |
340 | "(array-set! freds-diagonal 'foo 3)\n" | |
341 | "(array-ref fred 3 3) @result{} foo\n" | |
342 | "(define freds-center\n" | |
343 | " (make-shared-array fred (lambda (i j) (list (+ 3 i) (+ 3 j))) 2 2))\n" | |
344 | "(array-ref freds-center 0 0) @result{} foo\n" | |
1e6808ea | 345 | "@end lisp") |
1bbd0b84 | 346 | #define FUNC_NAME s_scm_make_shared_array |
0f2d19dd | 347 | { |
112ba0ac | 348 | scm_t_array_handle old_handle; |
0f2d19dd JB |
349 | SCM ra; |
350 | SCM inds, indptr; | |
351 | SCM imap; | |
112ba0ac MV |
352 | size_t k; |
353 | ssize_t i; | |
2b829bbb | 354 | long old_base, old_min, new_min, old_max, new_max; |
92c2555f | 355 | scm_t_array_dim *s; |
b3fcac34 DH |
356 | |
357 | SCM_VALIDATE_REST_ARGUMENT (dims); | |
34d19ef6 | 358 | SCM_VALIDATE_PROC (2, mapfunc); |
0cd6cb2f | 359 | ra = scm_i_shap2ra (dims); |
112ba0ac MV |
360 | |
361 | scm_array_get_handle (oldra, &old_handle); | |
362 | ||
04b87de5 | 363 | if (SCM_I_ARRAYP (oldra)) |
0f2d19dd | 364 | { |
04b87de5 | 365 | SCM_I_ARRAY_V (ra) = SCM_I_ARRAY_V (oldra); |
2b829bbb | 366 | old_base = old_min = old_max = SCM_I_ARRAY_BASE (oldra); |
112ba0ac MV |
367 | s = scm_array_handle_dims (&old_handle); |
368 | k = scm_array_handle_rank (&old_handle); | |
0f2d19dd JB |
369 | while (k--) |
370 | { | |
371 | if (s[k].inc > 0) | |
372 | old_max += (s[k].ubnd - s[k].lbnd) * s[k].inc; | |
373 | else | |
374 | old_min += (s[k].ubnd - s[k].lbnd) * s[k].inc; | |
375 | } | |
376 | } | |
377 | else | |
378 | { | |
04b87de5 | 379 | SCM_I_ARRAY_V (ra) = oldra; |
2b829bbb | 380 | old_base = old_min = 0; |
02339e5b | 381 | old_max = scm_c_generalized_vector_length (oldra) - 1; |
0f2d19dd | 382 | } |
112ba0ac | 383 | |
0f2d19dd | 384 | inds = SCM_EOL; |
04b87de5 MV |
385 | s = SCM_I_ARRAY_DIMS (ra); |
386 | for (k = 0; k < SCM_I_ARRAY_NDIM (ra); k++) | |
0f2d19dd | 387 | { |
e11e83f3 | 388 | inds = scm_cons (scm_from_long (s[k].lbnd), inds); |
0f2d19dd JB |
389 | if (s[k].ubnd < s[k].lbnd) |
390 | { | |
04b87de5 | 391 | if (1 == SCM_I_ARRAY_NDIM (ra)) |
943a0a87 AW |
392 | ra = scm_make_generalized_vector (scm_array_type (ra), |
393 | SCM_INUM0, SCM_UNDEFINED); | |
0f2d19dd | 394 | else |
943a0a87 AW |
395 | SCM_I_ARRAY_V (ra) = |
396 | scm_make_generalized_vector (scm_array_type (ra), | |
397 | SCM_INUM0, SCM_UNDEFINED); | |
112ba0ac | 398 | scm_array_handle_release (&old_handle); |
0f2d19dd JB |
399 | return ra; |
400 | } | |
401 | } | |
112ba0ac | 402 | |
fdc28395 | 403 | imap = scm_apply_0 (mapfunc, scm_reverse (inds)); |
0cd6cb2f | 404 | i = scm_array_handle_pos (&old_handle, imap); |
2b829bbb | 405 | SCM_I_ARRAY_BASE (ra) = new_min = new_max = i + old_base; |
0f2d19dd | 406 | indptr = inds; |
04b87de5 | 407 | k = SCM_I_ARRAY_NDIM (ra); |
0f2d19dd JB |
408 | while (k--) |
409 | { | |
410 | if (s[k].ubnd > s[k].lbnd) | |
411 | { | |
e11e83f3 | 412 | SCM_SETCAR (indptr, scm_sum (SCM_CAR (indptr), scm_from_int (1))); |
fdc28395 | 413 | imap = scm_apply_0 (mapfunc, scm_reverse (inds)); |
0cd6cb2f | 414 | s[k].inc = scm_array_handle_pos (&old_handle, imap) - i; |
0f2d19dd JB |
415 | i += s[k].inc; |
416 | if (s[k].inc > 0) | |
417 | new_max += (s[k].ubnd - s[k].lbnd) * s[k].inc; | |
418 | else | |
419 | new_min += (s[k].ubnd - s[k].lbnd) * s[k].inc; | |
420 | } | |
421 | else | |
422 | s[k].inc = new_max - new_min + 1; /* contiguous by default */ | |
423 | indptr = SCM_CDR (indptr); | |
424 | } | |
112ba0ac MV |
425 | |
426 | scm_array_handle_release (&old_handle); | |
427 | ||
b3fcac34 DH |
428 | if (old_min > new_min || old_max < new_max) |
429 | SCM_MISC_ERROR ("mapping out of range", SCM_EOL); | |
04b87de5 | 430 | if (1 == SCM_I_ARRAY_NDIM (ra) && 0 == SCM_I_ARRAY_BASE (ra)) |
0f2d19dd | 431 | { |
04b87de5 | 432 | SCM v = SCM_I_ARRAY_V (ra); |
6e708ef2 | 433 | size_t length = scm_c_generalized_vector_length (v); |
74014c46 DH |
434 | if (1 == s->inc && 0 == s->lbnd && length == 1 + s->ubnd) |
435 | return v; | |
0f2d19dd | 436 | if (s->ubnd < s->lbnd) |
943a0a87 AW |
437 | return scm_make_generalized_vector (scm_array_type (ra), SCM_INUM0, |
438 | SCM_UNDEFINED); | |
0f2d19dd | 439 | } |
0cd6cb2f | 440 | scm_i_ra_set_contp (ra); |
0f2d19dd JB |
441 | return ra; |
442 | } | |
1bbd0b84 | 443 | #undef FUNC_NAME |
0f2d19dd JB |
444 | |
445 | ||
446 | /* args are RA . DIMS */ | |
af45e3b0 DH |
447 | SCM_DEFINE (scm_transpose_array, "transpose-array", 1, 0, 1, |
448 | (SCM ra, SCM args), | |
1e6808ea MG |
449 | "Return an array sharing contents with @var{array}, but with\n" |
450 | "dimensions arranged in a different order. There must be one\n" | |
451 | "@var{dim} argument for each dimension of @var{array}.\n" | |
452 | "@var{dim0}, @var{dim1}, @dots{} should be integers between 0\n" | |
453 | "and the rank of the array to be returned. Each integer in that\n" | |
454 | "range must appear at least once in the argument list.\n" | |
455 | "\n" | |
456 | "The values of @var{dim0}, @var{dim1}, @dots{} correspond to\n" | |
457 | "dimensions in the array to be returned, their positions in the\n" | |
458 | "argument list to dimensions of @var{array}. Several @var{dim}s\n" | |
459 | "may have the same value, in which case the returned array will\n" | |
460 | "have smaller rank than @var{array}.\n" | |
461 | "\n" | |
462 | "@lisp\n" | |
b380b885 MD |
463 | "(transpose-array '#2((a b) (c d)) 1 0) @result{} #2((a c) (b d))\n" |
464 | "(transpose-array '#2((a b) (c d)) 0 0) @result{} #1(a d)\n" | |
465 | "(transpose-array '#3(((a b c) (d e f)) ((1 2 3) (4 5 6))) 1 1 0) @result{}\n" | |
466 | " #2((a 4) (b 5) (c 6))\n" | |
1e6808ea | 467 | "@end lisp") |
1bbd0b84 | 468 | #define FUNC_NAME s_scm_transpose_array |
0f2d19dd | 469 | { |
34d19ef6 | 470 | SCM res, vargs; |
92c2555f | 471 | scm_t_array_dim *s, *r; |
0f2d19dd | 472 | int ndim, i, k; |
af45e3b0 | 473 | |
b3fcac34 | 474 | SCM_VALIDATE_REST_ARGUMENT (args); |
1bbd0b84 | 475 | SCM_ASSERT (SCM_NIMP (ra), ra, SCM_ARG1, FUNC_NAME); |
e0e49670 | 476 | |
20930f28 | 477 | if (scm_is_generalized_vector (ra)) |
e0e49670 MV |
478 | { |
479 | /* Make sure that we are called with a single zero as | |
480 | arguments. | |
481 | */ | |
482 | if (scm_is_null (args) || !scm_is_null (SCM_CDR (args))) | |
483 | SCM_WRONG_NUM_ARGS (); | |
484 | SCM_VALIDATE_INT_COPY (SCM_ARG2, SCM_CAR (args), i); | |
485 | SCM_ASSERT_RANGE (SCM_ARG2, SCM_CAR (args), i == 0); | |
486 | return ra; | |
487 | } | |
488 | ||
66b9d7d3 | 489 | if (SCM_I_ARRAYP (ra)) |
0f2d19dd | 490 | { |
0f2d19dd | 491 | vargs = scm_vector (args); |
04b87de5 | 492 | if (SCM_SIMPLE_VECTOR_LENGTH (vargs) != SCM_I_ARRAY_NDIM (ra)) |
b3fcac34 | 493 | SCM_WRONG_NUM_ARGS (); |
0f2d19dd | 494 | ndim = 0; |
04b87de5 | 495 | for (k = 0; k < SCM_I_ARRAY_NDIM (ra); k++) |
0f2d19dd | 496 | { |
6e708ef2 | 497 | i = scm_to_signed_integer (SCM_SIMPLE_VECTOR_REF (vargs, k), |
04b87de5 | 498 | 0, SCM_I_ARRAY_NDIM(ra)); |
0f2d19dd JB |
499 | if (ndim < i) |
500 | ndim = i; | |
501 | } | |
502 | ndim++; | |
66b9d7d3 | 503 | res = scm_i_make_array (ndim); |
04b87de5 MV |
504 | SCM_I_ARRAY_V (res) = SCM_I_ARRAY_V (ra); |
505 | SCM_I_ARRAY_BASE (res) = SCM_I_ARRAY_BASE (ra); | |
0f2d19dd JB |
506 | for (k = ndim; k--;) |
507 | { | |
04b87de5 MV |
508 | SCM_I_ARRAY_DIMS (res)[k].lbnd = 0; |
509 | SCM_I_ARRAY_DIMS (res)[k].ubnd = -1; | |
0f2d19dd | 510 | } |
04b87de5 | 511 | for (k = SCM_I_ARRAY_NDIM (ra); k--;) |
0f2d19dd | 512 | { |
6e708ef2 | 513 | i = scm_to_int (SCM_SIMPLE_VECTOR_REF (vargs, k)); |
04b87de5 MV |
514 | s = &(SCM_I_ARRAY_DIMS (ra)[k]); |
515 | r = &(SCM_I_ARRAY_DIMS (res)[i]); | |
0f2d19dd JB |
516 | if (r->ubnd < r->lbnd) |
517 | { | |
518 | r->lbnd = s->lbnd; | |
519 | r->ubnd = s->ubnd; | |
520 | r->inc = s->inc; | |
521 | ndim--; | |
522 | } | |
523 | else | |
524 | { | |
525 | if (r->ubnd > s->ubnd) | |
526 | r->ubnd = s->ubnd; | |
527 | if (r->lbnd < s->lbnd) | |
528 | { | |
04b87de5 | 529 | SCM_I_ARRAY_BASE (res) += (s->lbnd - r->lbnd) * r->inc; |
0f2d19dd JB |
530 | r->lbnd = s->lbnd; |
531 | } | |
532 | r->inc += s->inc; | |
533 | } | |
534 | } | |
b3fcac34 DH |
535 | if (ndim > 0) |
536 | SCM_MISC_ERROR ("bad argument list", SCM_EOL); | |
0cd6cb2f | 537 | scm_i_ra_set_contp (res); |
0f2d19dd JB |
538 | return res; |
539 | } | |
20930f28 MV |
540 | |
541 | scm_wrong_type_arg_msg (NULL, 0, ra, "array"); | |
0f2d19dd | 542 | } |
1bbd0b84 | 543 | #undef FUNC_NAME |
0f2d19dd | 544 | |
1d7bdb25 GH |
545 | /* attempts to unroll an array into a one-dimensional array. |
546 | returns the unrolled array or #f if it can't be done. */ | |
1bbd0b84 | 547 | /* if strict is not SCM_UNDEFINED, return #f if returned array |
1d7bdb25 | 548 | wouldn't have contiguous elements. */ |
3b3b36dd | 549 | SCM_DEFINE (scm_array_contents, "array-contents", 1, 1, 0, |
1bbd0b84 | 550 | (SCM ra, SCM strict), |
b380b885 MD |
551 | "If @var{array} may be @dfn{unrolled} into a one dimensional shared array\n" |
552 | "without changing their order (last subscript changing fastest), then\n" | |
553 | "@code{array-contents} returns that shared array, otherwise it returns\n" | |
554 | "@code{#f}. All arrays made by @var{make-array} and\n" | |
555 | "@var{make-uniform-array} may be unrolled, some arrays made by\n" | |
556 | "@var{make-shared-array} may not be.\n\n" | |
557 | "If the optional argument @var{strict} is provided, a shared array will\n" | |
558 | "be returned only if its elements are stored internally contiguous in\n" | |
559 | "memory.") | |
1bbd0b84 | 560 | #define FUNC_NAME s_scm_array_contents |
0f2d19dd JB |
561 | { |
562 | SCM sra; | |
e0e49670 | 563 | |
20930f28 | 564 | if (scm_is_generalized_vector (ra)) |
e0e49670 MV |
565 | return ra; |
566 | ||
04b87de5 | 567 | if (SCM_I_ARRAYP (ra)) |
0f2d19dd | 568 | { |
04b87de5 MV |
569 | size_t k, ndim = SCM_I_ARRAY_NDIM (ra), len = 1; |
570 | if (!SCM_I_ARRAYP (ra) || !SCM_I_ARRAY_CONTP (ra)) | |
20930f28 MV |
571 | return SCM_BOOL_F; |
572 | for (k = 0; k < ndim; k++) | |
04b87de5 | 573 | len *= SCM_I_ARRAY_DIMS (ra)[k].ubnd - SCM_I_ARRAY_DIMS (ra)[k].lbnd + 1; |
943a0a87 | 574 | if (!SCM_UNBNDP (strict) && scm_is_true (strict)) |
74014c46 | 575 | { |
04b87de5 | 576 | if (ndim && (1 != SCM_I_ARRAY_DIMS (ra)[ndim - 1].inc)) |
20930f28 | 577 | return SCM_BOOL_F; |
04b87de5 | 578 | if (scm_is_bitvector (SCM_I_ARRAY_V (ra))) |
20930f28 | 579 | { |
04b87de5 MV |
580 | if (len != scm_c_bitvector_length (SCM_I_ARRAY_V (ra)) || |
581 | SCM_I_ARRAY_BASE (ra) % SCM_LONG_BIT || | |
20930f28 MV |
582 | len % SCM_LONG_BIT) |
583 | return SCM_BOOL_F; | |
584 | } | |
74014c46 | 585 | } |
20930f28 MV |
586 | |
587 | { | |
04b87de5 | 588 | SCM v = SCM_I_ARRAY_V (ra); |
20930f28 | 589 | size_t length = scm_c_generalized_vector_length (v); |
04b87de5 | 590 | if ((len == length) && 0 == SCM_I_ARRAY_BASE (ra) && SCM_I_ARRAY_DIMS (ra)->inc) |
20930f28 | 591 | return v; |
0f2d19dd | 592 | } |
20930f28 | 593 | |
66b9d7d3 | 594 | sra = scm_i_make_array (1); |
04b87de5 MV |
595 | SCM_I_ARRAY_DIMS (sra)->lbnd = 0; |
596 | SCM_I_ARRAY_DIMS (sra)->ubnd = len - 1; | |
597 | SCM_I_ARRAY_V (sra) = SCM_I_ARRAY_V (ra); | |
598 | SCM_I_ARRAY_BASE (sra) = SCM_I_ARRAY_BASE (ra); | |
599 | SCM_I_ARRAY_DIMS (sra)->inc = (ndim ? SCM_I_ARRAY_DIMS (ra)[ndim - 1].inc : 1); | |
20930f28 | 600 | return sra; |
0f2d19dd | 601 | } |
02339e5b MV |
602 | else |
603 | scm_wrong_type_arg_msg (NULL, 0, ra, "array"); | |
0f2d19dd | 604 | } |
1bbd0b84 | 605 | #undef FUNC_NAME |
0f2d19dd | 606 | |
1cc91f1b | 607 | |
943a0a87 AW |
608 | static void |
609 | list_to_array (SCM lst, scm_t_array_handle *handle, ssize_t pos, size_t k) | |
610 | { | |
611 | if (k == scm_array_handle_rank (handle)) | |
612 | scm_array_handle_set (handle, pos, lst); | |
613 | else | |
614 | { | |
615 | scm_t_array_dim *dim = scm_array_handle_dims (handle) + k; | |
616 | ssize_t inc = dim->inc; | |
617 | size_t len = 1 + dim->ubnd - dim->lbnd, n; | |
618 | char *errmsg = NULL; | |
619 | ||
620 | n = len; | |
621 | while (n > 0 && scm_is_pair (lst)) | |
622 | { | |
623 | list_to_array (SCM_CAR (lst), handle, pos, k + 1); | |
624 | pos += inc; | |
625 | lst = SCM_CDR (lst); | |
626 | n -= 1; | |
627 | } | |
628 | if (n != 0) | |
629 | errmsg = "too few elements for array dimension ~a, need ~a"; | |
630 | if (!scm_is_null (lst)) | |
631 | errmsg = "too many elements for array dimension ~a, want ~a"; | |
632 | if (errmsg) | |
633 | scm_misc_error (NULL, errmsg, scm_list_2 (scm_from_ulong (k), | |
634 | scm_from_size_t (len))); | |
635 | } | |
636 | } | |
637 | ||
1cc91f1b | 638 | |
f301dbf3 | 639 | SCM_DEFINE (scm_list_to_typed_array, "list->typed-array", 3, 0, 0, |
2caaadd1 | 640 | (SCM type, SCM shape, SCM lst), |
f301dbf3 MV |
641 | "Return an array of the type @var{type}\n" |
642 | "with elements the same as those of @var{lst}.\n" | |
bfad4005 | 643 | "\n" |
2caaadd1 MV |
644 | "The argument @var{shape} determines the number of dimensions\n" |
645 | "of the array and their shape. It is either an exact integer,\n" | |
646 | "giving the\n" | |
647 | "number of dimensions directly, or a list whose length\n" | |
648 | "specifies the number of dimensions and each element specified\n" | |
649 | "the lower and optionally the upper bound of the corresponding\n" | |
650 | "dimension.\n" | |
651 | "When the element is list of two elements, these elements\n" | |
652 | "give the lower and upper bounds. When it is an exact\n" | |
653 | "integer, it gives only the lower bound.") | |
f301dbf3 | 654 | #define FUNC_NAME s_scm_list_to_typed_array |
0f2d19dd | 655 | { |
2caaadd1 | 656 | SCM row; |
0f2d19dd | 657 | SCM ra; |
bcbbea0e | 658 | scm_t_array_handle handle; |
bfad4005 | 659 | |
bfad4005 | 660 | row = lst; |
2caaadd1 | 661 | if (scm_is_integer (shape)) |
0f2d19dd | 662 | { |
2caaadd1 MV |
663 | size_t k = scm_to_size_t (shape); |
664 | shape = SCM_EOL; | |
bfad4005 MV |
665 | while (k-- > 0) |
666 | { | |
667 | shape = scm_cons (scm_length (row), shape); | |
2caaadd1 | 668 | if (k > 0 && !scm_is_null (row)) |
bfad4005 MV |
669 | row = scm_car (row); |
670 | } | |
671 | } | |
672 | else | |
673 | { | |
2caaadd1 MV |
674 | SCM shape_spec = shape; |
675 | shape = SCM_EOL; | |
bfad4005 MV |
676 | while (1) |
677 | { | |
2caaadd1 MV |
678 | SCM spec = scm_car (shape_spec); |
679 | if (scm_is_pair (spec)) | |
680 | shape = scm_cons (spec, shape); | |
681 | else | |
682 | shape = scm_cons (scm_list_2 (spec, | |
683 | scm_sum (scm_sum (spec, | |
684 | scm_length (row)), | |
685 | scm_from_int (-1))), | |
686 | shape); | |
687 | shape_spec = scm_cdr (shape_spec); | |
688 | if (scm_is_pair (shape_spec)) | |
689 | { | |
690 | if (!scm_is_null (row)) | |
691 | row = scm_car (row); | |
692 | } | |
bfad4005 MV |
693 | else |
694 | break; | |
695 | } | |
0f2d19dd | 696 | } |
bfad4005 | 697 | |
f0b91039 MV |
698 | ra = scm_make_typed_array (type, SCM_UNSPECIFIED, |
699 | scm_reverse_x (shape, SCM_EOL)); | |
20930f28 | 700 | |
bcbbea0e | 701 | scm_array_get_handle (ra, &handle); |
943a0a87 | 702 | list_to_array (lst, &handle, 0, 0); |
bcbbea0e MV |
703 | scm_array_handle_release (&handle); |
704 | ||
705 | return ra; | |
0f2d19dd | 706 | } |
1bbd0b84 | 707 | #undef FUNC_NAME |
0f2d19dd | 708 | |
f301dbf3 MV |
709 | SCM_DEFINE (scm_list_to_array, "list->array", 2, 0, 0, |
710 | (SCM ndim, SCM lst), | |
711 | "Return an array with elements the same as those of @var{lst}.") | |
712 | #define FUNC_NAME s_scm_list_to_array | |
713 | { | |
714 | return scm_list_to_typed_array (SCM_BOOL_T, ndim, lst); | |
715 | } | |
716 | #undef FUNC_NAME | |
717 | ||
e0e49670 MV |
718 | /* Print dimension DIM of ARRAY. |
719 | */ | |
0f2d19dd | 720 | |
e0e49670 | 721 | static int |
943a0a87 | 722 | scm_i_print_array_dimension (scm_t_array_handle *h, int dim, int pos, |
e0e49670 MV |
723 | SCM port, scm_print_state *pstate) |
724 | { | |
943a0a87 AW |
725 | if (dim == h->ndims) |
726 | scm_iprin1 (scm_array_handle_ref (h, pos), port, pstate); | |
727 | else | |
e0e49670 | 728 | { |
943a0a87 AW |
729 | ssize_t i; |
730 | scm_putc ('(', port); | |
731 | for (i = h->dims[dim].lbnd; i <= h->dims[dim].ubnd; | |
732 | i++, pos += h->dims[dim].inc) | |
733 | { | |
734 | scm_i_print_array_dimension (h, dim+1, pos, port, pstate); | |
735 | if (i < h->dims[dim].ubnd) | |
736 | scm_putc (' ', port); | |
737 | } | |
738 | scm_putc (')', port); | |
e0e49670 | 739 | } |
e0e49670 MV |
740 | return 1; |
741 | } | |
742 | ||
943a0a87 | 743 | /* Print an array. |
e0e49670 MV |
744 | */ |
745 | ||
e0e49670 MV |
746 | static int |
747 | scm_i_print_array (SCM array, SCM port, scm_print_state *pstate) | |
748 | { | |
943a0a87 | 749 | scm_t_array_handle h; |
e0e49670 | 750 | long i; |
2caaadd1 | 751 | int print_lbnds = 0, zero_size = 0, print_lens = 0; |
e0e49670 | 752 | |
943a0a87 AW |
753 | scm_array_get_handle (array, &h); |
754 | ||
e0e49670 | 755 | scm_putc ('#', port); |
943a0a87 AW |
756 | if (h.ndims != 1 || h.dims[0].lbnd != 0) |
757 | scm_intprint (h.ndims, 10, port); | |
758 | if (h.element_type != SCM_ARRAY_ELEMENT_TYPE_SCM) | |
759 | scm_write (scm_array_handle_element_type (&h), port); | |
20930f28 | 760 | |
943a0a87 | 761 | for (i = 0; i < h.ndims; i++) |
2caaadd1 | 762 | { |
943a0a87 | 763 | if (h.dims[i].lbnd != 0) |
2caaadd1 | 764 | print_lbnds = 1; |
943a0a87 | 765 | if (h.dims[i].ubnd - h.dims[i].lbnd + 1 == 0) |
2caaadd1 MV |
766 | zero_size = 1; |
767 | else if (zero_size) | |
768 | print_lens = 1; | |
769 | } | |
770 | ||
771 | if (print_lbnds || print_lens) | |
943a0a87 | 772 | for (i = 0; i < h.ndims; i++) |
e0e49670 | 773 | { |
2caaadd1 | 774 | if (print_lbnds) |
e0e49670 MV |
775 | { |
776 | scm_putc ('@', port); | |
943a0a87 | 777 | scm_intprint (h.dims[i].lbnd, 10, port); |
2caaadd1 MV |
778 | } |
779 | if (print_lens) | |
780 | { | |
781 | scm_putc (':', port); | |
943a0a87 | 782 | scm_intprint (h.dims[i].ubnd - h.dims[i].lbnd + 1, |
2caaadd1 | 783 | 10, port); |
e0e49670 | 784 | } |
e0e49670 MV |
785 | } |
786 | ||
943a0a87 | 787 | if (h.ndims == 0) |
5f37cb63 MV |
788 | { |
789 | /* Rank zero arrays, which are really just scalars, are printed | |
790 | specially. The consequent way would be to print them as | |
791 | ||
792 | #0 OBJ | |
793 | ||
794 | where OBJ is the printed representation of the scalar, but we | |
795 | print them instead as | |
796 | ||
797 | #0(OBJ) | |
798 | ||
799 | to make them look less strange. | |
800 | ||
801 | Just printing them as | |
802 | ||
803 | OBJ | |
804 | ||
805 | would be correct in a way as well, but zero rank arrays are | |
806 | not really the same as Scheme values since they are boxed and | |
807 | can be modified with array-set!, say. | |
808 | */ | |
809 | scm_putc ('(', port); | |
943a0a87 | 810 | scm_i_print_array_dimension (&h, 0, 0, port, pstate); |
5f37cb63 MV |
811 | scm_putc (')', port); |
812 | return 1; | |
813 | } | |
814 | else | |
943a0a87 | 815 | return scm_i_print_array_dimension (&h, 0, 0, port, pstate); |
e0e49670 | 816 | } |
1cc91f1b | 817 | |
bfad4005 MV |
818 | /* Read an array. This function can also read vectors and uniform |
819 | vectors. Also, the conflict between '#f' and '#f32' and '#f64' is | |
820 | handled here. | |
821 | ||
822 | C is the first character read after the '#'. | |
823 | */ | |
824 | ||
2caaadd1 MV |
825 | static int |
826 | read_decimal_integer (SCM port, int c, ssize_t *resp) | |
827 | { | |
828 | ssize_t sign = 1; | |
829 | ssize_t res = 0; | |
830 | int got_it = 0; | |
831 | ||
832 | if (c == '-') | |
833 | { | |
834 | sign = -1; | |
835 | c = scm_getc (port); | |
836 | } | |
837 | ||
838 | while ('0' <= c && c <= '9') | |
839 | { | |
840 | res = 10*res + c-'0'; | |
841 | got_it = 1; | |
842 | c = scm_getc (port); | |
843 | } | |
844 | ||
845 | if (got_it) | |
f30e1bdf | 846 | *resp = sign * res; |
2caaadd1 MV |
847 | return c; |
848 | } | |
849 | ||
bfad4005 MV |
850 | SCM |
851 | scm_i_read_array (SCM port, int c) | |
852 | { | |
5a6d139b | 853 | ssize_t rank; |
eff3dd99 | 854 | scm_t_wchar tag_buf[8]; |
bfad4005 MV |
855 | int tag_len; |
856 | ||
eff3dd99 | 857 | SCM tag, shape = SCM_BOOL_F, elements; |
bfad4005 MV |
858 | |
859 | /* XXX - shortcut for ordinary vectors. Shouldn't be necessary but | |
860 | the array code can not deal with zero-length dimensions yet, and | |
861 | we want to allow zero-length vectors, of course. | |
862 | */ | |
863 | if (c == '(') | |
864 | { | |
865 | scm_ungetc (c, port); | |
866 | return scm_vector (scm_read (port)); | |
867 | } | |
868 | ||
869 | /* Disambiguate between '#f' and uniform floating point vectors. | |
870 | */ | |
871 | if (c == 'f') | |
872 | { | |
873 | c = scm_getc (port); | |
874 | if (c != '3' && c != '6') | |
875 | { | |
876 | if (c != EOF) | |
877 | scm_ungetc (c, port); | |
878 | return SCM_BOOL_F; | |
879 | } | |
880 | rank = 1; | |
eff3dd99 | 881 | tag_buf[0] = 'f'; |
bfad4005 MV |
882 | tag_len = 1; |
883 | goto continue_reading_tag; | |
884 | } | |
885 | ||
2caaadd1 MV |
886 | /* Read rank. |
887 | */ | |
888 | rank = 1; | |
889 | c = read_decimal_integer (port, c, &rank); | |
890 | if (rank < 0) | |
891 | scm_i_input_error (NULL, port, "array rank must be non-negative", | |
892 | SCM_EOL); | |
bfad4005 | 893 | |
2caaadd1 MV |
894 | /* Read tag. |
895 | */ | |
bfad4005 MV |
896 | tag_len = 0; |
897 | continue_reading_tag: | |
eff3dd99 AW |
898 | while (c != EOF && c != '(' && c != '@' && c != ':' |
899 | && tag_len < sizeof tag_buf / sizeof tag_buf[0]) | |
bfad4005 | 900 | { |
eff3dd99 | 901 | tag_buf[tag_len++] = c; |
bfad4005 MV |
902 | c = scm_getc (port); |
903 | } | |
eff3dd99 AW |
904 | if (tag_len == 0) |
905 | tag = SCM_BOOL_T; | |
906 | else | |
907 | { | |
908 | tag = scm_string_to_symbol (scm_from_utf32_stringn (tag_buf, tag_len)); | |
909 | if (tag_len == sizeof tag_buf / sizeof tag_buf[0]) | |
910 | scm_i_input_error (NULL, port, "invalid array tag, starting with: ~a", | |
911 | scm_list_1 (tag)); | |
912 | } | |
913 | ||
2caaadd1 MV |
914 | /* Read shape. |
915 | */ | |
916 | if (c == '@' || c == ':') | |
bfad4005 | 917 | { |
2caaadd1 | 918 | shape = SCM_EOL; |
5f37cb63 MV |
919 | |
920 | do | |
bfad4005 | 921 | { |
2caaadd1 MV |
922 | ssize_t lbnd = 0, len = 0; |
923 | SCM s; | |
5f37cb63 | 924 | |
2caaadd1 | 925 | if (c == '@') |
5f37cb63 | 926 | { |
5f37cb63 | 927 | c = scm_getc (port); |
2caaadd1 | 928 | c = read_decimal_integer (port, c, &lbnd); |
5f37cb63 | 929 | } |
2caaadd1 MV |
930 | |
931 | s = scm_from_ssize_t (lbnd); | |
932 | ||
933 | if (c == ':') | |
5f37cb63 | 934 | { |
5f37cb63 | 935 | c = scm_getc (port); |
2caaadd1 | 936 | c = read_decimal_integer (port, c, &len); |
f30e1bdf LC |
937 | if (len < 0) |
938 | scm_i_input_error (NULL, port, | |
939 | "array length must be non-negative", | |
940 | SCM_EOL); | |
941 | ||
2caaadd1 | 942 | s = scm_list_2 (s, scm_from_ssize_t (lbnd+len-1)); |
5f37cb63 | 943 | } |
2caaadd1 MV |
944 | |
945 | shape = scm_cons (s, shape); | |
946 | } while (c == '@' || c == ':'); | |
947 | ||
948 | shape = scm_reverse_x (shape, SCM_EOL); | |
bfad4005 MV |
949 | } |
950 | ||
951 | /* Read nested lists of elements. | |
952 | */ | |
953 | if (c != '(') | |
954 | scm_i_input_error (NULL, port, | |
955 | "missing '(' in vector or array literal", | |
956 | SCM_EOL); | |
957 | scm_ungetc (c, port); | |
958 | elements = scm_read (port); | |
959 | ||
2caaadd1 | 960 | if (scm_is_false (shape)) |
5a6d139b | 961 | shape = scm_from_ssize_t (rank); |
2caaadd1 MV |
962 | else if (scm_ilength (shape) != rank) |
963 | scm_i_input_error | |
964 | (NULL, port, | |
965 | "the number of shape specifications must match the array rank", | |
966 | SCM_EOL); | |
bfad4005 | 967 | |
5f37cb63 MV |
968 | /* Handle special print syntax of rank zero arrays; see |
969 | scm_i_print_array for a rationale. | |
970 | */ | |
971 | if (rank == 0) | |
2caaadd1 MV |
972 | { |
973 | if (!scm_is_pair (elements)) | |
974 | scm_i_input_error (NULL, port, | |
975 | "too few elements in array literal, need 1", | |
976 | SCM_EOL); | |
977 | if (!scm_is_null (SCM_CDR (elements))) | |
978 | scm_i_input_error (NULL, port, | |
979 | "too many elements in array literal, want 1", | |
980 | SCM_EOL); | |
981 | elements = SCM_CAR (elements); | |
982 | } | |
5f37cb63 MV |
983 | |
984 | /* Construct array. | |
985 | */ | |
eff3dd99 | 986 | return scm_list_to_typed_array (tag, shape, elements); |
bfad4005 MV |
987 | } |
988 | ||
ab1be174 | 989 | |
2a610be5 AW |
990 | static SCM |
991 | array_handle_ref (scm_t_array_handle *h, size_t pos) | |
992 | { | |
993 | return scm_c_generalized_vector_ref (SCM_I_ARRAY_V (h->array), pos); | |
994 | } | |
995 | ||
996 | static void | |
997 | array_handle_set (scm_t_array_handle *h, size_t pos, SCM val) | |
998 | { | |
999 | scm_c_generalized_vector_set_x (SCM_I_ARRAY_V (h->array), pos, val); | |
1000 | } | |
1001 | ||
1002 | /* FIXME: should be handle for vect? maybe not, because of dims */ | |
1003 | static void | |
1004 | array_get_handle (SCM array, scm_t_array_handle *h) | |
1005 | { | |
1006 | scm_t_array_handle vh; | |
1007 | scm_array_get_handle (SCM_I_ARRAY_V (array), &vh); | |
1008 | h->element_type = vh.element_type; | |
1009 | h->elements = vh.elements; | |
1010 | h->writable_elements = vh.writable_elements; | |
1011 | scm_array_handle_release (&vh); | |
1012 | ||
1013 | h->dims = SCM_I_ARRAY_DIMS (array); | |
1014 | h->ndims = SCM_I_ARRAY_NDIM (array); | |
1015 | h->base = SCM_I_ARRAY_BASE (array); | |
1016 | } | |
1017 | ||
735bcfe5 AW |
1018 | SCM_ARRAY_IMPLEMENTATION (SCM_SMOB_TYPE_BITS (scm_i_tc16_array), |
1019 | SCM_SMOB_TYPE_MASK, | |
2a610be5 | 1020 | array_handle_ref, array_handle_set, |
f65e0168 | 1021 | array_get_handle) |
2a610be5 | 1022 | |
0f2d19dd | 1023 | void |
2fa901a5 | 1024 | scm_init_arrays () |
0f2d19dd | 1025 | { |
04b87de5 | 1026 | scm_i_tc16_array = scm_make_smob_type ("array", 0); |
04b87de5 MV |
1027 | scm_set_smob_print (scm_i_tc16_array, scm_i_print_array); |
1028 | scm_set_smob_equalp (scm_i_tc16_array, scm_array_equal_p); | |
1029 | ||
0f2d19dd | 1030 | scm_add_feature ("array"); |
20930f28 | 1031 | |
2fa901a5 | 1032 | #include "libguile/arrays.x" |
bfad4005 | 1033 | |
0f2d19dd | 1034 | } |
89e00824 ML |
1035 | |
1036 | /* | |
1037 | Local Variables: | |
1038 | c-file-style: "gnu" | |
1039 | End: | |
1040 | */ |