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New functions array-from, array-from*, array-amend!
* libguile/arrays.h (scm_array_from, scm_array_from_s, scm_array_amend_x): New declarations. * libguile/arrays.c (scm_array_from, scm_array_from_s, scm_array_amend_x): New functions, export as array-from, array-from*, array-amend!. * test-suite/tests/arrays.test: Tests for array-from, array-from*, array-amend!. Replace with-test-prefix/c&e with with-test-prefix where the array read syntax isn't used.
This commit is contained in:
Daniel Llorens
parent
7b6d854cf1
commit
d1435ea6bd
3 changed files with 290 additions and 4 deletions
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@ -28,7 +28,6 @@
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <assert.h>
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#include "verify.h"
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@ -474,6 +473,178 @@ SCM_DEFINE (scm_make_shared_array, "make-shared-array", 2, 0, 1,
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#undef FUNC_NAME
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static void
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array_from_pos (scm_t_array_handle *handle, size_t *ndim, size_t *k, SCM *i, ssize_t *pos,
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scm_t_array_dim **s, char const * FUNC_NAME, SCM error_args)
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{
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*s = scm_array_handle_dims (handle);
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*k = *ndim = scm_array_handle_rank (handle);
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for (; *k>0 && scm_is_pair (*i); --*k, ++*s, *i=scm_cdr (*i))
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{
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ssize_t ik = scm_to_ssize_t (scm_car (*i));
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if (ik<(*s)->lbnd || ik>(*s)->ubnd)
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{
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scm_array_handle_release (handle);
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scm_misc_error (FUNC_NAME, "indices out of range", error_args);
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}
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*pos += (ik-(*s)->lbnd) * (*s)->inc;
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}
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}
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static void
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array_from_get_o (scm_t_array_handle *handle, size_t k, scm_t_array_dim *s, ssize_t pos,
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SCM *o)
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{
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scm_t_array_dim * os;
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*o = scm_i_make_array (k);
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SCM_I_ARRAY_SET_V (*o, handle->vector);
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SCM_I_ARRAY_SET_BASE (*o, pos + handle->base);
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os = SCM_I_ARRAY_DIMS (*o);
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for (; k>0; --k, ++s, ++os)
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{
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os->ubnd = s->ubnd;
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os->lbnd = s->lbnd;
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os->inc = s->inc;
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}
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}
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SCM_DEFINE (scm_array_from_s, "array-from*", 1, 0, 1,
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(SCM ra, SCM indices),
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"Return the array slice @var{ra}[@var{indices} ..., ...]\n"
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"The rank of @var{ra} must equal to the number of indices or larger.\n\n"
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"See also @code{array-ref}, @code{array-from}, @code{array-amend!}.\n\n"
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"@code{array-from*} may return a rank-0 array. For example:\n"
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"@lisp\n"
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"(array-from* #2((1 2 3) (4 5 6)) 1 1) @result{} #0(5)\n"
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"(array-from* #2((1 2 3) (4 5 6)) 1) @result{} #(4 5 6)\n"
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"(array-from* #2((1 2 3) (4 5 6))) @result{} #2((1 2 3) (4 5 6))\n"
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"(array-from* #0(5) @result{} #0(5).\n"
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"@end lisp")
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#define FUNC_NAME s_scm_array_from_s
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{
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SCM o, i = indices;
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size_t ndim, k;
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ssize_t pos = 0;
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scm_t_array_handle handle;
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scm_t_array_dim *s;
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scm_array_get_handle (ra, &handle);
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array_from_pos (&handle, &ndim, &k, &i, &pos, &s, FUNC_NAME, scm_list_2 (ra, indices));
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if (k==ndim)
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o = ra;
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else if (scm_is_null (i))
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{
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array_from_get_o(&handle, k, s, pos, &o);
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}
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else
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{
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scm_array_handle_release (&handle);
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scm_misc_error(FUNC_NAME, "too many indices", scm_list_2 (ra, indices));
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}
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scm_array_handle_release (&handle);
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return o;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_array_from, "array-from", 1, 0, 1,
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(SCM ra, SCM indices),
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"Return the element at the @code{(@var{indices} ...)} position\n"
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"in array @var{ra}, or the array slice @var{ra}[@var{indices} ..., ...]\n"
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"if the rank of @var{ra} is larger than the number of indices.\n\n"
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"See also @code{array-ref}, @code{array-from*}, @code{array-amend!}.\n\n"
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"@code{array-from} never returns a rank 0 array. For example:\n"
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"@lisp\n"
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"(array-from #2((1 2 3) (4 5 6)) 1 1) @result{} 5\n"
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"(array-from #2((1 2 3) (4 5 6)) 1) @result{} #(4 5 6)\n"
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"(array-from #2((1 2 3) (4 5 6))) @result{} #2((1 2 3) (4 5 6))\n"
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"(array-from #0(5) @result{} 5.\n"
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"@end lisp")
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#define FUNC_NAME s_scm_array_from
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{
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SCM o, i = indices;
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size_t ndim, k;
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ssize_t pos = 0;
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scm_t_array_handle handle;
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scm_t_array_dim *s;
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scm_array_get_handle (ra, &handle);
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array_from_pos (&handle, &ndim, &k, &i, &pos, &s, FUNC_NAME, scm_list_2 (ra, indices));
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if (k>0)
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{
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if (k==ndim)
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o = ra;
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else
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array_from_get_o(&handle, k, s, pos, &o);
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}
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else if (scm_is_null(i))
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o = scm_array_handle_ref (&handle, pos);
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else
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{
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scm_array_handle_release (&handle);
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scm_misc_error(FUNC_NAME, "too many indices", scm_list_2 (ra, indices));
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}
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scm_array_handle_release (&handle);
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return o;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_array_amend_x, "array-amend!", 2, 0, 1,
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(SCM ra, SCM b, SCM indices),
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"Set the array slice @var{ra}[@var{indices} ..., ...] to @var{b}\n."
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"Equivalent to @code{(array-copy! @var{b} (apply array-from @var{ra} @var{indices}))}\n"
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"if the number of indices is smaller than the rank of @var{ra}; otherwise\n"
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"equivalent to @code{(apply array-set! @var{ra} @var{b} @var{indices})}.\n"
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"This function returns the modified array @var{ra}.\n\n"
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"See also @code{array-ref}, @code{array-from}, @code{array-from*}.\n\n"
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"For example:\n"
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"@lisp\n"
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"(define A (list->array 2 '((1 2 3) (4 5 6))))\n"
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"(array-amend! A #0(99) 1 1) @result{} #2((1 2 3) (4 #0(99) 6))\n"
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"(array-amend! A 99 1 1) @result{} #2((1 2 3) (4 99 6))\n"
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"(array-amend! A #(a b c) 0) @result{} #2((a b c) (4 99 6))\n"
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"(array-amend! A #2((x y z) (9 8 7))) @result{} #2((x y z) (9 8 7))\n\n"
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"(define B (make-array 0))\n"
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"(array-amend! B 15) @result{} #0(15)\n"
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"@end lisp")
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#define FUNC_NAME s_scm_array_amend_x
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{
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SCM o, i = indices;
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size_t ndim, k;
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ssize_t pos = 0;
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scm_t_array_handle handle;
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scm_t_array_dim *s;
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scm_array_get_handle (ra, &handle);
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array_from_pos (&handle, &ndim, &k, &i, &pos, &s, FUNC_NAME, scm_list_3 (ra, b, indices));
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if (k>0)
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{
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if (k==ndim)
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o = ra;
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else
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array_from_get_o(&handle, k, s, pos, &o);
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scm_array_handle_release(&handle);
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/* an error is still possible here if o and b don't match. */
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/* FIXME copying like this wastes the handle, and the bounds matching
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behavior of array-copy! is not strict. */
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scm_array_copy_x(b, o);
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}
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else if (scm_is_null(i))
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{
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scm_array_handle_set (&handle, pos, b); /* ra may be non-ARRAYP */
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scm_array_handle_release (&handle);
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}
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else
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{
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scm_array_handle_release (&handle);
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scm_misc_error(FUNC_NAME, "too many indices", scm_list_3 (ra, b, indices));
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}
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return ra;
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}
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#undef FUNC_NAME
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#undef ARRAY_FROM_GET_O
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/* args are RA . DIMS */
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SCM_DEFINE (scm_transpose_array, "transpose-array", 1, 0, 1,
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(SCM ra, SCM args),
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