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array.c
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1987-06-04
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/*
(c) Copyright Taiichi Yuasa and Masami Hagiya, 1984. All rights reserved.
Copying of this file is authorized to users who have executed the true and
proper "License Agreement for Kyoto Common LISP" with SIGLISP.
*/
/*
array.c
array routines
*/
#include "include.h"
#define ADIMLIM 16*1024*1024
#define ATOTLIM 16*1024*1024
enum aelttype
get_aelttype(x)
object x;
{
if (x == Sstring_char)
return(aet_ch);
else if (x == Sbit)
return(aet_bit);
else if (x == Sfixnum)
return(aet_fix);
else if (x == Sshort_float)
return(aet_sf);
else if (x == Slong_float)
return(aet_lf);
else
return(aet_object);
}
enum aelttype
array_elttype(x)
object x;
{
switch(type_of(x)) {
case t_array:
case t_vector:
return((enum aelttype)x->a.a_elttype);
case t_string:
return(aet_ch);
case t_bitvector:
return(aet_bit);
default:
FEwrong_type_argument(Sarray, x);
}
}
char *
array_address(x, inc)
object x;
int inc;
{
switch(array_elttype(x)) {
case aet_object:
case aet_fix:
case aet_sf:
return((char *)(x->a.a_self + inc));
case aet_ch:
return(x->st.st_self + inc);
case aet_lf:
return((char *)(x->lfa.lfa_self + inc));
}
}
array_allocself(x, staticp)
object x;
bool staticp;
{
int i, d;
char *(*f)();
d = x->a.a_dim;
if (staticp)
f = alloc_contblock;
else
f = alloc_relblock;
switch (array_elttype(x)) {
case aet_object:
x->a.a_self = (object *)(*f)(sizeof(object)*d);
for (i = 0; i < d; i++)
x->a.a_self[i] = Cnil;
break;
case aet_ch:
x->st.st_self = (*f)(d);
for (i = 0; i < d; i++)
x->st.st_self[i] = ' ';
break;
case aet_bit:
d = (d+7)/8;
x->bv.bv_self = (*f)(d);
for (i = 0; i < d; i++)
x->bv.bv_self[i] = '\0';
x->bv.bv_offset = 0;
break;
case aet_fix:
x->fixa.fixa_self = (fixnum *)(*f)(sizeof(fixnum)*d);
for (i = 0; i < d; i++)
x->fixa.fixa_self[i] = 0;
break;
case aet_sf:
x->sfa.sfa_self = (shortfloat *)(*f)(sizeof(shortfloat)*d);
for (i = 0; i < d; i++)
x->sfa.sfa_self[i] = 0.0;
break;
case aet_lf:
x->lfa.lfa_self = (longfloat *)(*f)(sizeof(longfloat)*d);
for (i = 0; i < d; i++)
x->lfa.lfa_self[i] = 0.0;
break;
}
}
object
aref(x, index)
object x;
int index;
{
if (index >= x->a.a_dim) {
vs_push(make_fixnum(index));
FEerror("The index, ~D, is too large.", 1, vs_head);
}
switch (array_elttype(x)) {
case aet_object:
return(x->a.a_self[index]);
case aet_ch:
return(code_char(x->ust.ust_self[index]));
case aet_bit:
index += x->bv.bv_offset;
if (x->bv.bv_self[index/8] & (0200>>index%8))
return(small_fixnum(1));
else
return(small_fixnum(0));
case aet_fix:
return(make_fixnum(x->fixa.fixa_self[index]));
case aet_sf:
return(make_shortfloat(x->sfa.sfa_self[index]));
case aet_lf:
return(make_longfloat(x->lfa.lfa_self[index]));
}
}
object
aset(x, index, value)
object x;
int index;
object value;
{
int i;
if (index >= x->a.a_dim) {
vs_push(make_fixnum(index));
FEerror("The index, ~D, too large.", 1, vs_head);
}
switch (array_elttype(x)) {
case aet_object:
x->a.a_self[index] = value;
break;
case aet_ch:
if (type_of(value) != t_character)
FEerror("~S is not a character.", 1, value);
x->st.st_self[index] = value->ch.ch_code;
break;
case aet_bit:
i = fixint(value);
if (i != 0 && i != 1)
FEerror("~S is not a bit.", 1, value);
index += x->bv.bv_offset;
if (i == 0)
x->bv.bv_self[index/8] &= ~(0200>>index%8);
else
x->bv.bv_self[index/8] |= 0200>>index%8;
break;
case aet_fix:
x->fixa.fixa_self[index] = fixint(value);
break;
case aet_sf:
x->sfa.sfa_self[index] = object_to_double(value);
break;
case aet_lf:
x->lfa.lfa_self[index] = object_to_double(value);
break;
}
return(value);
}
object
aref1(v, index)
object v;
int index;
{
int i;
object l;
if (index < 0) {
vs_push(make_fixnum(index));
FEerror("Negative index: ~D.", 1, vs_head);
}
switch (type_of(v)) {
case t_vector:
case t_bitvector:
return(aref(v, index));
case t_string:
if (index >= v->st.st_dim)
goto E;
return(code_char(v->ust.ust_self[index]));
default:
FEerror("~S is not a vector.", 1, v);
}
E:
vs_push(make_fixnum(index));
FEerror("The index, ~D, is too large.", 1, vs_head);
}
object
aset1(v, index, val)
object v;
int index;
object val;
{
int i;
object l;
if (index < 0) {
vs_push(make_fixnum(index));
FEerror("Negative index: ~D.", 1, vs_head);
}
switch (type_of(v)) {
case t_vector:
case t_bitvector:
return(aset(v, index, val));
case t_string:
if (index >= v->st.st_dim)
goto E;
if (type_of(val) != t_character)
FEerror("~S is not a character.", 1, val);
v->st.st_self[index] = val->ch.ch_code;
return(val);
default:
FEerror("~S is not a vector.", 1, v);
}
E:
vs_push(make_fixnum(index));
FEerror("The index, ~D, is too large", 1, vs_head);
}
/*
Displace(from, to, offset) displaces the from-array
to the to-array (the original array) by the specified offset.
It changes the a_displaced field of both arrays.
The field is a cons; the car of the from-array points to
the to-array and the cdr of the to-array is a list of arrays
displaced to the to-array, so the from-array is pushed to the
cdr of the to-array's a_displaced.
*/
displace(from, to, offset)
object from, to, offset;
{
int j;
enum aelttype totype, fromtype;
j = fixnnint(offset);
totype = array_elttype(to);
fromtype = array_elttype(from);
if (totype != fromtype)
FEerror("Cannot displace the array,~%\
because the element types don't match.", 0);
if (j + from->a.a_dim > to->a.a_dim)
FEerror("Cannot displace the array,~%\
because the total size of the to-array is too small.", 0);
from->a.a_displaced = make_cons(to, Cnil);
if (to->a.a_displaced == Cnil)
to->a.a_displaced = make_cons(Cnil, Cnil);
to->a.a_displaced->c.c_cdr =
make_cons(from, to->a.a_displaced->c.c_cdr);
if (fromtype == aet_bit) {
j += to->bv.bv_offset;
from->bv.bv_self = to->bv.bv_self + j/8;
from->bv.bv_offset = j%8;
}
#ifdef MV
#endif
else
from->st.st_self = array_address(to, j);
}
/*
Undisplace(from) destroys the displacement from the from-array.
*/
undisplace(from)
object from;
{
object *p;
object to = from->a.a_displaced->c.c_car;
if (to == Cnil)
return;
from->a.a_displaced->c.c_car = Cnil;
for (p = &(to->a.a_displaced->c.c_cdr);; p = &((*p)->c.c_cdr))
if ((*p)->c.c_car == from) {
*p = (*p)->c.c_cdr;
return;
}
}
/*
Check_displaced(dlist, orig, newdim) checks if the displaced
arrays can keep the displacement when the original array is
adjusted.
Dlist is the list of displaced arrays, orig is the original array
and newdim is the new dimension of the original array.
*/
check_displaced(dlist, orig, newdim)
object dlist, orig;
int newdim;
{
object x;
for (; dlist != Cnil; dlist = dlist->c.c_cdr) {
x = dlist->c.c_car;
if (x->a.a_self == NULL)
continue;
if (array_elttype(x) != aet_bit) {
if (array_address(x, x->a.a_dim) >
array_address(orig, newdim))
FEerror("Can't keep displacement.", 0);
} else {
if ((x->bv.bv_self - orig->bv.bv_self)*8 +
x->bv.bv_dim - newdim +
x->bv.bv_offset - orig->bv.bv_offset > 0)
FEerror("Can't keep displacement.", 0);
}
check_displaced(x->a.a_displaced->c.c_cdr, orig, newdim);
}
}
/*
Adjust_displaced(x, diff) adds the int value diff
to the a_self field of the array x and all the arrays displaced to x.
This function is used in siLreplace_array (ADJUST-ARRAY) and
the garbage collector.
*/
adjust_displaced(x, diff)
object x;
int diff;
{
if (x->a.a_self != NULL)
x->a.a_self = (object *)((int)(x->a.a_self) + diff);
for (x = x->a.a_displaced->c.c_cdr; x != Cnil; x = x->c.c_cdr)
adjust_displaced(x->c.c_car, diff);
}
setup_fillp(x, fillp)
object x, fillp;
{
int j;
if (fillp == Cnil) {
x->v.v_hasfillp = FALSE;
x->v.v_fillp = x->v.v_dim;
} else if (fillp == Ct) {
x->v.v_hasfillp = TRUE;
x->v.v_fillp = x->v.v_dim;
} else if ((j = fixnnint(fillp)) > x->v.v_dim)
FEerror("The fill-pointer ~S is too large.", 1, fillp);
else {
x->v.v_hasfillp = TRUE;
x->v.v_fillp = j;
}
}
/*
Internal function for making arrays:
(si:make-pure-array element-type adjustable
displaced-to displaced-index-offset
static
dim0 dim1 ... )
*/
siLmake_pure_array()
{
int r, s, i, j;
object x;
r = vs_top - vs_base - 5;
if (r < 0)
too_few_arguments();
x = alloc_object(t_array);
x->a.a_self = NULL;
x->a.a_displaced = Cnil;
x->a.a_rank = r;
x->a.a_dims = NULL;
x->a.a_elttype = (short)get_aelttype(vs_base[0]);
vs_base[0] = x;
x->a.a_dims = (int *)alloc_relblock(sizeof(int)*r);
if (r >= ARANKLIM) {
vs_push(make_fixnum(r));
FEerror("The array rank, ~R, is too large.", 1, vs_head);
}
for (i = 0, s = 1; i < r; i++) {
if ((j = fixnnint(vs_base[i+5])) > ADIMLIM) {
vs_push(make_fixnum(i+1));
FEerror("The ~:R array dimension, ~D, is too large.",
2, vs_head, vs_base[i+5]);
}
s *= (x->a.a_dims[i] = j);
}
if (s > ATOTLIM) {
vs_push(make_fixnum(s));
FEerror("The array total size, ~D, is too large.",
1, vs_head);
}
x->a.a_dim = s;
x->a.a_adjustable = vs_base[1] != Cnil;
if (vs_base[2] == Cnil)
array_allocself(x, vs_base[4] != Cnil);
else
displace(x, vs_base[2], vs_base[3]);
vs_top = vs_base + 1;
}
/*
Internal function for making vectors:
(si:make-vector element-type dimension adjustable fill-pointer
displaced-to displaced-index-offset
static)
*/
siLmake_vector()
{
int d, i, j;
object x;
enum aelttype aet;
check_arg(7);
aet = get_aelttype(vs_base[0]);
if ((d = fixnnint(vs_base[1])) > ADIMLIM)
FEerror("The vector dimension, ~D, is too large.",
1, vs_base[1]);
if (aet == aet_ch)
x = alloc_object(t_string);
else if (aet == aet_bit)
x = alloc_object(t_bitvector);
else
x = alloc_object(t_vector);
x->v.v_self = NULL;
x->v.v_displaced = Cnil;
x->v.v_dim = d;
x->v.v_adjustable = vs_base[2] != Cnil;
if (aet != aet_ch && aet != aet_bit)
x->v.v_elttype = (short)aet;
vs_base[0] = x;
setup_fillp(x, vs_base[3]);
if (vs_base[4] == Cnil)
array_allocself(x, vs_base[6] != Cnil);
else
displace(x, vs_base[4], vs_base[5]);
vs_top = vs_base + 1;
}
Laref()
{
int r, s, i, j;
object x;
r = vs_top - vs_base - 1;
if (r < 0)
too_few_arguments();
x = vs_base[0];
switch (type_of(x)) {
case t_array:
if (r != x->a.a_rank)
FEerror("Wrong number of indices.", 0);
for (i = j = 0; i < r; i++) {
if ((s = fixnnint(vs_base[i+1])) >= x->a.a_dims[i]) {
vs_push(make_fixnum(i+1));
FEerror("The ~:R index, ~S, to the array~%\
~S is too large.", 3, vs_head, vs_base[i+1], x);
}
j = j*(x->a.a_dims[i]) + s;
}
break;
case t_vector:
case t_string:
case t_bitvector:
if (r != 1)
FEerror("Wrong number of indices.", 0);
j = fixnnint(vs_base[1]);
if (j >= x->v.v_dim) {
FEerror("The first index, ~S, to the array~%\
~S is too large.", 2, vs_base[1], x);
}
break;
default:
FEwrong_type_argument(Sarray, x);
}
vs_base[0] = aref(x, j);
vs_top = vs_base + 1;
}
/*
Internal function for setting array elements:
(si:aset array dim0 dim1 ... newvalue)
*/
siLaset()
{
int r, s, i, j;
object x;
r = vs_top - vs_base - 2;
if (r < 0)
too_few_arguments();
x = vs_base[0];
switch (type_of(x)) {
case t_array:
if (r != x->a.a_rank)
FEerror("Wrong number of indices.", 0);
for (i = j = 0; i < r; i++) {
if ((s = fixnnint(vs_base[i+1])) >= x->a.a_dims[i]) {
vs_push(make_fixnum(i+1));
FEerror("The ~:R index, ~S, to the array~%\
~S is too large.", 3, vs_head, vs_base[i+1], x);
}
j = j*(x->a.a_dims[i]) + s;
}
break;
case t_vector:
case t_string:
case t_bitvector:
if (r != 1)
FEerror("Wrong number of indices.", 0);
j = fixnnint(vs_base[1]);
if (j >= x->v.v_dim) {
FEerror("The first index, ~S, to the array~%\
~S is too large.", 2, vs_base[1], x);
}
break;
default:
FEwrong_type_argument(Sarray, x);
}
aset(x, j, vs_base[r+1]);
vs_base[0] = vs_base[r+1];
vs_top = vs_base + 1;
}
Larray_element_type()
{
check_arg(1);
switch (array_elttype(vs_base[0])) {
case aet_object:
vs_base[0] = Ct;
break;
case aet_ch:
vs_base[0] = Sstring_char;
break;
case aet_bit:
vs_base[0] = Sbit;
break;
case aet_fix:
vs_base[0] = Sfixnum;
break;
case aet_sf:
vs_base[0] = Sshort_float;
break;
case aet_lf:
vs_base[0] = Slong_float;
break;
}
}
Larray_rank()
{
check_arg(1);
check_type_array(&vs_base[0]);
if (type_of(vs_base[0]) == t_array)
vs_base[0] = make_fixnum(vs_base[0]->a.a_rank);
else
vs_base[0] = make_fixnum(1);
}
Larray_dimension()
{
int i;
check_arg(2);
check_type_array(&vs_base[0]);
i = fixnnint(vs_base[1]);
if (type_of(vs_base[0]) == t_array) {
if (i >= vs_base[0]->a.a_rank)
goto ILLEGAL;
vs_base[0] = make_fixnum(vs_base[0]->a.a_dims[i]);
} else {
if (i != 0)
goto ILLEGAL;
vs_base[0] = make_fixnum(vs_base[0]->v.v_dim);
}
vs_top = vs_base + 1;
return;
ILLEGAL:
FEerror("~S is an illegal axis-number to the array~%\
~S.", 2, vs_base[1], vs_base[0]);
}
Larray_total_size()
{
check_arg(1);
check_type_array(&vs_base[0]);
vs_base[0] = make_fixnum(vs_base[0]->a.a_dim);
}
Ladjustable_array_p()
{
check_arg(1);
check_type_array(&vs_base[0]);
if (vs_base[0]->a.a_adjustable)
vs_base[0] = Ct;
else
vs_base[0] = Cnil;
}
/*
Internal function for checking if an array is displaced.
*/
siLdisplaced_array_p()
{
check_arg(1);
check_type_array(&vs_base[0]);
if (vs_base[0]->a.a_displaced->c.c_car != Cnil)
vs_base[0] = Ct;
else
vs_base[0] = Cnil;
}
Lsvref()
{
int i;
object x;
check_arg(2);
x = vs_base[0];
if (type_of(x) != t_vector ||
x->v.v_adjustable ||
x->v.v_hasfillp ||
x->v.v_displaced->c.c_car != Cnil ||
(enum aelttype)x->v.v_elttype != aet_object)
FEerror("~S is not a simple general vector.", 1, x);
if ((i = fix(vs_base[1])) >= x->v.v_dim)
illegal_index(x, vs_base[1]);
vs_base[0] = x->v.v_self[i];
vs_pop;
}
siLsvset()
{
int i;
object x;
check_arg(3);
x = vs_base[0];
if (type_of(x) != t_vector ||
x->v.v_adjustable ||
x->v.v_hasfillp ||
x->v.v_displaced->c.c_car != Cnil ||
(enum aelttype)x->v.v_elttype != aet_object)
FEerror("~S is not a simple general vector.", 1, x);
if ((i = fixnnint(vs_base[1])) >= x->v.v_dim)
illegal_index(x, vs_base[1]);
vs_base[0] = x->v.v_self[i] = vs_base[2];
vs_pop;
vs_pop;
}
Larray_has_fill_pointer_p()
{
check_arg(1);
check_type_array(&vs_base[0]);
if (type_of(vs_base[0]) == t_array)
vs_base[0] = Cnil;
else if (vs_base[0]->v.v_hasfillp)
vs_base[0] = Ct;
else
vs_base[0] = Cnil;
}
Lfill_pointer()
{
check_arg(1);
check_type_vector(&vs_base[0]);
if (vs_base[0]->v.v_hasfillp)
vs_base[0] = make_fixnum(vs_base[0]->v.v_fillp);
else
FEerror("The vector ~S has no fill pointer.", 1, vs_base[0]);
}
/*
Internal function for setting fill pointer.
*/
siLfill_pointer_set()
{
int i;
check_arg(2);
check_type_vector(&vs_base[0]);
i = fixnnint(vs_base[1]);
if (vs_base[0]->v.v_hasfillp)
if (i > vs_base[0]->v.v_dim)
FEerror("The fill-pointer ~S is too large",
1, vs_base[0]);
else
vs_base[0]->v.v_fillp = i;
else
FEerror("The vector ~S has no fill pointer.",
1, vs_base[0]);
vs_base[0] = vs_base[1];
vs_top = vs_base + 1;
}
/*
Internal function for replacing the contents of arrays:
(si:replace-array old-array new-array).
Used in ADJUST-ARRAY.
*/
siLreplace_array()
{
object old, new, displaced, dlist;
int diff;
check_arg(2);
old = vs_base[0];
new = vs_base[1];
if (type_of(old) != type_of(new))
goto CANNOT;
if (type_of(old) == t_array && old->a.a_rank != new->a.a_rank)
goto CANNOT;
if (!old->a.a_adjustable)
FEerror("~S is not adjustable.", 1, old);
diff = (int)(new->a.a_self) - (int)(old->a.a_self);
dlist = old->a.a_displaced->c.c_cdr;
displaced = make_cons(new->a.a_displaced->c.c_car, dlist);
vs_push(displaced);
check_displaced(dlist, old, new->a.a_dim);
adjust_displaced(old, diff);
undisplace(old);
switch (type_of(old)) {
case t_array:
case t_vector:
case t_bitvector:
old->a = new->a;
break;
case t_string:
old->st = new->st;
break;
default:
goto CANNOT;
}
old->a.a_displaced = displaced;
vs_pop;
vs_pop;
return;
CANNOT:
FEerror("Cannot replace the array ~S~%\
by the array ~S.", 2, old, new);
}
siLaset_by_cursor()
{
object *base = vs_base;
object x;
check_arg(3);
vs_base = vs_top;
vs_push(base[0]);
for (x = base[2]; !endp(x); x = MMcdr(x))
vs_push(MMcar(x));
vs_push(base[1]);
siLaset();
}
init_array_function()
{
make_constant("ARRAY-RANK-LIMIT", make_fixnum(ARANKLIM));
make_constant("ARRAY-DIMENSION-LIMIT", make_fixnum(ADIMLIM));
make_constant("ARRAY-TOTAL-SIZE-LIMIT", make_fixnum(ATOTLIM));
make_si_function("MAKE-PURE-ARRAY", siLmake_pure_array);
make_si_function("MAKE-VECTOR", siLmake_vector);
make_function("AREF", Laref);
make_si_function("ASET", siLaset);
make_function("ARRAY-ELEMENT-TYPE", Larray_element_type);
make_function("ARRAY-RANK", Larray_rank);
make_function("ARRAY-DIMENSION", Larray_dimension);
make_function("ARRAY-TOTAL-SIZE", Larray_total_size);
make_function("ADJUSTABLE-ARRAY-P", Ladjustable_array_p);
make_si_function("DISPLACED-ARRAY-P", siLdisplaced_array_p);
make_function("SVREF", Lsvref);
make_si_function("SVSET", siLsvset);
make_function("ARRAY-HAS-FILL-POINTER-P",
Larray_has_fill_pointer_p);
make_function("FILL-POINTER", Lfill_pointer);
make_si_function("FILL-POINTER-SET", siLfill_pointer_set);
make_si_function("REPLACE-ARRAY", siLreplace_array);
make_si_function("ASET-BY-CURSOR", siLaset_by_cursor);
}