mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 20:00:19 +02:00
Clean up (array-for-each-cell)
* libguile/array-map.c (array-for-each-cell, array-for-each-cell-in-order): Moved from libguile/arrays.c. Fix argument names. Complete docstring. * libguile/array-map.h (array-for-each-cell, array-for-each-cell-in-order): Declarations moved from libguile/arrays.h. * test-suite/tests/array-map.test: Renamed from test-suite/tests/ramap.test, fix module name. Add tests for (array-for-each-cell). * test-suite/Makefile.am: Apply rename array-map.test -> ramap.test. * doc/ref/api-compound.texi: Minor documentation fixes.
This commit is contained in:
Daniel Llorens
parent
2ce48a3f46
commit
f6003e8881
7 changed files with 283 additions and 253 deletions
|
|
@ -42,6 +42,8 @@
|
|||
|
||||
#include "libguile/validate.h"
|
||||
#include "libguile/array-map.h"
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
|
||||
/* The WHAT argument for `scm_gc_malloc ()' et al. */
|
||||
|
|
@ -624,7 +626,8 @@ SCM_DEFINE (scm_i_array_equal_p, "array-equal?", 0, 2, 1,
|
|||
return SCM_BOOL_T;
|
||||
|
||||
while (!scm_is_null (rest))
|
||||
{ if (scm_is_false (scm_array_equal_p (ra0, ra1)))
|
||||
{
|
||||
if (scm_is_false (scm_array_equal_p (ra0, ra1)))
|
||||
return SCM_BOOL_F;
|
||||
ra0 = ra1;
|
||||
ra1 = scm_car (rest);
|
||||
|
|
@ -635,6 +638,244 @@ SCM_DEFINE (scm_i_array_equal_p, "array-equal?", 0, 2, 1,
|
|||
#undef FUNC_NAME
|
||||
|
||||
|
||||
// Copy array descriptor with different base.
|
||||
SCM
|
||||
scm_i_array_rebase (SCM a, size_t base)
|
||||
{
|
||||
size_t ndim = SCM_I_ARRAY_NDIM (a);
|
||||
SCM b = scm_words (((scm_t_bits) ndim << 17) + scm_tc7_array, 3 + ndim*3);
|
||||
SCM_I_ARRAY_SET_V (b, SCM_I_ARRAY_V (a));
|
||||
// FIXME do check base
|
||||
SCM_I_ARRAY_SET_BASE (b, base);
|
||||
memcpy (SCM_I_ARRAY_DIMS (b), SCM_I_ARRAY_DIMS (a), sizeof (scm_t_array_dim)*ndim);
|
||||
return b;
|
||||
}
|
||||
|
||||
SCM_DEFINE (scm_array_for_each_cell, "array-for-each-cell", 2, 0, 1,
|
||||
(SCM frame_rank, SCM op, SCM args),
|
||||
"Apply @var{op} to each of the cells of rank rank(@var{arg})-@var{frame_rank}\n"
|
||||
"of the arrays @var{args}, in unspecified order. The first\n"
|
||||
"@var{frame_rank} dimensions of each @var{arg} must match.\n"
|
||||
"Rank-0 cells are passed as rank-0 arrays.\n\n"
|
||||
"The value returned is unspecified.\n\n"
|
||||
"For example:\n"
|
||||
"@lisp\n"
|
||||
";; Sort the rows of rank-2 array A.\n\n"
|
||||
"(array-for-each-cell 1 (lambda (x) (sort! x <)) a)\n"
|
||||
"\n"
|
||||
";; Compute the arguments of the (x y) vectors in the rows of rank-2\n"
|
||||
";; array XYS and store them in rank-1 array ANGLES. Inside OP,\n"
|
||||
";; XY is a rank-1 (2-1) array, and ANGLE is a rank-0 (1-1) array.\n\n"
|
||||
"(array-for-each-cell 1 \n"
|
||||
" (lambda (xy angle)\n"
|
||||
" (array-set! angle (atan (array-ref xy 1) (array-ref xy 0))))\n"
|
||||
" xys angles)\n"
|
||||
"@end lisp")
|
||||
#define FUNC_NAME s_scm_array_for_each_cell
|
||||
{
|
||||
int const N = scm_ilength (args);
|
||||
int const frank = scm_to_int (frame_rank);
|
||||
|
||||
// wish C had better stack support
|
||||
|
||||
size_t stack_size = 0;
|
||||
stack_size += N*sizeof (scm_t_array_handle);
|
||||
stack_size += N*sizeof (SCM);
|
||||
stack_size += N*sizeof (scm_t_array_dim *);
|
||||
stack_size += N*sizeof (int);
|
||||
stack_size += frank*sizeof (ssize_t);
|
||||
|
||||
stack_size += N*sizeof (SCM);
|
||||
stack_size += N*sizeof (SCM *);
|
||||
stack_size += frank*sizeof (ssize_t);
|
||||
stack_size += frank*sizeof (int);
|
||||
|
||||
stack_size += N*sizeof (size_t);
|
||||
char * stack = scm_gc_malloc_pointerless (stack_size, "stack");
|
||||
|
||||
#define AFIC_ALLOC_ADVANCE(stack, count, type, name) \
|
||||
type * name = (void *)stack; \
|
||||
stack += count*sizeof (type);
|
||||
|
||||
char * stack0 = stack;
|
||||
AFIC_ALLOC_ADVANCE (stack, N, scm_t_array_handle, ah);
|
||||
AFIC_ALLOC_ADVANCE (stack, N, SCM, args_);
|
||||
AFIC_ALLOC_ADVANCE (stack, N, scm_t_array_dim *, as);
|
||||
AFIC_ALLOC_ADVANCE (stack, N, int, rank);
|
||||
AFIC_ALLOC_ADVANCE (stack, frank, ssize_t, s);
|
||||
|
||||
AFIC_ALLOC_ADVANCE (stack, N, SCM, ai);
|
||||
AFIC_ALLOC_ADVANCE (stack, N, SCM *, dargs);
|
||||
AFIC_ALLOC_ADVANCE (stack, frank, ssize_t, i);
|
||||
AFIC_ALLOC_ADVANCE (stack, frank, int, order);
|
||||
|
||||
AFIC_ALLOC_ADVANCE(stack, N, size_t, base);
|
||||
assert((stack0+stack_size==stack) && "internal error");
|
||||
#undef AFIC_ALLOC_ADVANCE
|
||||
|
||||
for (int n=0; scm_is_pair(args); args=scm_cdr(args), ++n)
|
||||
{
|
||||
args_[n] = scm_car(args);
|
||||
scm_array_get_handle(args_[n], ah+n);
|
||||
as[n] = scm_array_handle_dims(ah+n);
|
||||
rank[n] = scm_array_handle_rank(ah+n);
|
||||
}
|
||||
// checks.
|
||||
char const * msg = NULL;
|
||||
if (frank<0)
|
||||
{
|
||||
msg = "bad frame rank";
|
||||
} else
|
||||
{
|
||||
for (int n=0; n!=N; ++n) {
|
||||
if (rank[n]<frank) {
|
||||
msg = "frame too large for arguments";
|
||||
goto check_msg;
|
||||
}
|
||||
for (int k=0; k!=frank; ++k) {
|
||||
if (as[n][k].lbnd!=0) {
|
||||
msg = "non-zero base index is not supported";
|
||||
goto check_msg;
|
||||
}
|
||||
if (as[0][k].ubnd!=as[n][k].ubnd) {
|
||||
msg = "mismatched frames";
|
||||
goto check_msg;
|
||||
}
|
||||
s[k] = as[n][k].ubnd + 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
check_msg: ;
|
||||
if (msg!=NULL)
|
||||
{
|
||||
for (int n=0; n!=N; ++n) {
|
||||
scm_array_handle_release(ah+n);
|
||||
}
|
||||
scm_misc_error("array-for-each-cell", msg, scm_cons_star(frame_rank, args));
|
||||
}
|
||||
// prepare moving cells.
|
||||
scm_t_array_dim * ais[N];
|
||||
for (int n=0; n!=N; ++n)
|
||||
{
|
||||
ai[n] = scm_i_make_array(rank[n]-frank);
|
||||
SCM_I_ARRAY_SET_V (ai[n], scm_shared_array_root(args_[n]));
|
||||
// FIXME scm_array_handle_base (ah+n) should be in Guile
|
||||
SCM_I_ARRAY_SET_BASE (ai[n], ah[n].base);
|
||||
ais[n] = SCM_I_ARRAY_DIMS(ai[n]);
|
||||
for (int k=frank; k!=rank[n]; ++k) {
|
||||
ais[n][k-frank] = as[n][k];
|
||||
}
|
||||
}
|
||||
// prepare rest list for callee.
|
||||
SCM dargs_ = SCM_EOL;
|
||||
{
|
||||
SCM *p = &dargs_;
|
||||
for (int n=0; n<N; ++n) {
|
||||
*p = scm_cons (SCM_UNSPECIFIED, SCM_EOL);
|
||||
dargs[n] = SCM_CARLOC (*p);
|
||||
p = SCM_CDRLOC (*p);
|
||||
}
|
||||
}
|
||||
// special case for rank 0.
|
||||
if (frank==0)
|
||||
{
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
*dargs[n] = ai[n];
|
||||
}
|
||||
scm_apply_0(op, dargs_);
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
scm_array_handle_release(ah+n);
|
||||
}
|
||||
return SCM_UNSPECIFIED;
|
||||
}
|
||||
// FIXME determine best looping order.
|
||||
for (int k=0; k!=frank; ++k)
|
||||
{
|
||||
i[k] = 0;
|
||||
order[k] = frank-1-k;
|
||||
}
|
||||
// find outermost compact dim.
|
||||
ssize_t step = s[order[0]];
|
||||
int ocd = 1;
|
||||
for (; ocd<frank; step *= s[order[ocd]], ++ocd)
|
||||
{
|
||||
for (int n=0; n!=N; ++n) {
|
||||
if (step*as[n][order[0]].inc!=as[n][order[ocd]].inc) {
|
||||
goto ocd_reached;
|
||||
}
|
||||
}
|
||||
}
|
||||
ocd_reached: ;
|
||||
// rank loop.
|
||||
for (int n=0; n!=N; ++n)
|
||||
{
|
||||
base[n] = SCM_I_ARRAY_BASE(ai[n]);
|
||||
}
|
||||
for (;;)
|
||||
{
|
||||
for (ssize_t z=0; z!=step; ++z)
|
||||
{
|
||||
// we are forced to create fresh array descriptors for each
|
||||
// call since we don't know whether the callee will keep them,
|
||||
// and Guile offers no way to copy the descriptor (since
|
||||
// descriptors are immutable). Yet another reason why this
|
||||
// should be in Scheme.
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
*dargs[n] = scm_i_array_rebase(ai[n], base[n]);
|
||||
base[n] += as[n][order[0]].inc;
|
||||
}
|
||||
scm_apply_0(op, dargs_);
|
||||
}
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
base[n] -= step*as[n][order[0]].inc;
|
||||
}
|
||||
for (int k=ocd; ; ++k)
|
||||
{
|
||||
if (k==frank)
|
||||
{
|
||||
goto end;
|
||||
} else if (i[order[k]]<s[order[k]]-1)
|
||||
{
|
||||
++i[order[k]];
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
base[n] += as[n][order[k]].inc;
|
||||
}
|
||||
break;
|
||||
} else {
|
||||
i[order[k]] = 0;
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
base[n] += as[n][order[k]].inc*(1-s[order[k]]);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
end:;
|
||||
for (int n=0; n<N; ++n)
|
||||
{
|
||||
scm_array_handle_release(ah+n);
|
||||
}
|
||||
return SCM_UNSPECIFIED;
|
||||
}
|
||||
#undef FUNC_NAME
|
||||
|
||||
|
||||
SCM_DEFINE (scm_array_for_each_cell_in_order, "array-for-each-cell-in-order", 2, 0, 1,
|
||||
(SCM frank, SCM op, SCM a),
|
||||
"Same as array-for-each-cell, but visit the cells sequentially\n"
|
||||
"and in row-major order.\n")
|
||||
#define FUNC_NAME s_scm_array_for_each_cell_in_order
|
||||
{
|
||||
return scm_array_for_each_cell (frank, op, a);
|
||||
}
|
||||
#undef FUNC_NAME
|
||||
|
||||
|
||||
void
|
||||
scm_init_array_map (void)
|
||||
{
|
||||
|
|
@ -642,6 +883,7 @@ scm_init_array_map (void)
|
|||
scm_add_feature (s_scm_array_for_each);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Local Variables:
|
||||
c-file-style: "gnu"
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue