int scheme_rational_eq(const Scheme_Object *a, const Scheme_Object *b)
{
Scheme_Rational *ra = (Scheme_Rational *)a;
Scheme_Rational *rb = (Scheme_Rational *)b;
if (SCHEME_INTP(ra->num) && SCHEME_INTP(rb->num)) {
if (ra->num != rb->num)
return 0;
} else if (SCHEME_BIGNUMP(ra->num) && SCHEME_BIGNUMP(rb->num)) {
if (!scheme_bignum_eq(ra->num, rb->num))
return 0;
} else
return 0;
if (SCHEME_INTP(ra->denom) && SCHEME_INTP(rb->denom)) {
if (ra->denom != rb->denom)
return 0;
} else if (SCHEME_BIGNUMP(ra->denom) && SCHEME_BIGNUMP(rb->denom)) {
if (!scheme_bignum_eq(ra->denom, rb->denom))
return 0;
} else
return 0;
return 1;
}
static Scheme_Object *
integer_to_char (int argc, Scheme_Object *argv[])
{
if (SCHEME_INTP(argv[0])) {
long v;
v = SCHEME_INT_VAL(argv[0]);
if ((v >= 0)
&& (v <= 0x10FFFF)
&& ((v < 0xD800) || (v > 0xDFFF)))
return _scheme_make_char(v);
} else if (SCHEME_BIGNUMP(argv[0])
&& SCHEME_BIGPOS(argv[0])) {
/* On 32-bit machines, there's still a chance... */
long y;
if (scheme_get_int_val(argv[0], &y)) {
if (y <= 0x10FFFF)
return _scheme_make_char(y);
}
}
scheme_wrong_type("integer->char",
"exact integer in [0,#x10FFFF], not in [#xD800,#xDFFF]",
0, argc, argv);
return NULL;
}
static Scheme_Object *
integer_to_char (int argc, Scheme_Object *argv[])
{
if (SCHEME_INTP(argv[0])) {
intptr_t v;
v = SCHEME_INT_VAL(argv[0]);
if ((v >= 0)
&& (v <= 0x10FFFF)
&& ((v < 0xD800) || (v > 0xDFFF)))
return _scheme_make_char((int)v);
} else if (SCHEME_BIGNUMP(argv[0])
&& SCHEME_BIGPOS(argv[0])) {
/* On 32-bit machines, there's still a chance... */
intptr_t y;
if (scheme_get_int_val(argv[0], &y)) {
if (y <= 0x10FFFF)
return _scheme_make_char((int)y);
}
}
scheme_wrong_contract("integer->char",
"(and/c (integer-in 0 #x10FFFF) (not/c (integer-in #xD800 #xDFFF)))",
0, argc, argv);
return NULL;
}
Scheme_Object *scheme_rational_round(const Scheme_Object *o)
{
Scheme_Rational *r = (Scheme_Rational *)o;
Scheme_Object *q, *qd, *delta, *half;
int more = 0, can_eq_half, negative;
negative = !scheme_is_rational_positive(o);
q = scheme_bin_quotient(r->num, r->denom);
/* Get remainder absolute value: */
qd = scheme_bin_mult(q, r->denom);
if (negative)
delta = scheme_bin_minus(qd, r->num);
else
delta = scheme_bin_minus(r->num, qd);
half = scheme_bin_quotient(r->denom, scheme_make_integer(2));
can_eq_half = SCHEME_FALSEP(scheme_odd_p(1, &r->denom));
if (SCHEME_INTP(half) && SCHEME_INTP(delta)) {
if (can_eq_half && (SCHEME_INT_VAL(delta) == SCHEME_INT_VAL(half)))
more = SCHEME_TRUEP(scheme_odd_p(1, &q));
else
more = (SCHEME_INT_VAL(delta) > SCHEME_INT_VAL(half));
} else if (SCHEME_BIGNUMP(delta) && SCHEME_BIGNUMP(half)) {
if (can_eq_half && (scheme_bignum_eq(delta, half)))
more = SCHEME_TRUEP(scheme_odd_p(1, &q));
else
more = !scheme_bignum_lt(delta, half);
} else
more = SCHEME_BIGNUMP(delta);
if (more) {
if (negative)
q = scheme_sub1(1, &q);
else
q = scheme_add1(1, &q);
}
return q;
}
static int rational_lt(const Scheme_Object *a, const Scheme_Object *b, int or_eq)
{
Scheme_Rational *ra = (Scheme_Rational *)a;
Scheme_Rational *rb = (Scheme_Rational *)b;
Scheme_Object *ma, *mb;
ma = scheme_bin_mult(ra->num, rb->denom);
mb = scheme_bin_mult(rb->num, ra->denom);
if (SCHEME_INTP(ma) && SCHEME_INTP(mb)) {
if (or_eq)
return (SCHEME_INT_VAL(ma) <= SCHEME_INT_VAL(mb));
else
return (SCHEME_INT_VAL(ma) < SCHEME_INT_VAL(mb));
} else if (SCHEME_BIGNUMP(ma) && SCHEME_BIGNUMP(mb)) {
if (or_eq)
return scheme_bignum_le(ma, mb);
else
return scheme_bignum_lt(ma, mb);
} else if (SCHEME_BIGNUMP(mb)) {
return SCHEME_BIGPOS(mb);
} else
return !SCHEME_BIGPOS(ma);
}
Scheme_Object *scheme_complex_power(const Scheme_Object *base, const Scheme_Object *exponent)
{
Scheme_Complex *cb = (Scheme_Complex *)base;
Scheme_Complex *ce = (Scheme_Complex *)exponent;
double a, b, c, d, bm, ba, nm, na, r1, r2;
int d_is_zero;
if ((ce->i == zero) && !SCHEME_FLOATP(ce->r)) {
if (SCHEME_INTP(ce->r) || SCHEME_BIGNUMP(ce->r))
return scheme_generic_integer_power(base, ce->r);
}
a = scheme_get_val_as_double(cb->r);
b = scheme_get_val_as_double(cb->i);
c = scheme_get_val_as_double(ce->r);
d = scheme_get_val_as_double(ce->i);
d_is_zero = (ce->i == zero);
bm = sqrt(a * a + b * b);
ba = atan2(b, a);
/* New mag & angle */
nm = scheme_double_expt(bm, c) * exp(-(ba * d));
if (d_is_zero) /* precision here can avoid NaNs */
na = ba * c;
else
na = log(bm) * d + ba * c;
r1 = nm * cos(na);
r2 = nm * sin(na);
#ifdef MZ_USE_SINGLE_FLOATS
/* Coerce to double or float? */
#ifdef USE_SINGLE_FLOATS_AS_DEFAULT
if (!SCHEME_DBLP(cb->r) && !SCHEME_DBLP(cb->i)
&& !SCHEME_DBLP(ce->r) && !SCHEME_DBLP(ce->i))
#else
if (SCHEME_FLTP(cb->r) && SCHEME_FLTP(cb->i)
&& SCHEME_FLTP(ce->r) && SCHEME_FLTP(ce->i))
#endif
return scheme_make_complex(scheme_make_float((float)r1),
scheme_make_float((float)r2));
#endif
return scheme_make_complex(scheme_make_double(r1),
scheme_make_double(r2));
}
intptr_t scheme_get_semaphore_init(const char *who, int n, Scheme_Object **p)
{
intptr_t v;
if (n) {
if (!SCHEME_INTP(p[0])) {
if (!SCHEME_BIGNUMP(p[0]) || !SCHEME_BIGPOS(p[0]))
scheme_wrong_contract(who, "exact-nonnegative-integer?", 0, n, p);
}
if (!scheme_get_int_val(p[0], &v)) {
scheme_raise_exn(MZEXN_FAIL,
"%s: starting value %s is too large",
who,
scheme_make_provided_string(p[0], 0, NULL));
} else if (v < 0)
scheme_wrong_contract(who, "exact-nonnegative-integer?", 0, n, p);
} else
v = 0;
return v;
}
static Scheme_Object *
do_list_ref(char *name, int takecar, int argc, Scheme_Object *argv[])
{
long i, k;
Scheme_Object *lst, *index, *bnindex;
if (SCHEME_BIGNUMP(argv[1])) {
bnindex = argv[1];
k = 0;
} else if (!SCHEME_INTP(argv[1])) {
scheme_wrong_type(name, "non-negative exact integer", 1, argc, argv);
return NULL;
} else {
bnindex = NULL;
k = SCHEME_INT_VAL(argv[1]);
}
lst = argv[0];
index = argv[1];
if ((bnindex && !SCHEME_BIGPOS(bnindex))
|| (!bnindex && (k < 0))) {
scheme_wrong_type(name, "non-negative exact integer", 1, argc, argv);
return NULL;
}
do {
if (bnindex) {
if (SCHEME_INTP(bnindex)) {
k = SCHEME_INT_VAL(bnindex);
bnindex = 0;
} else {
k = LISTREF_BIGNUM_SLICE;
bnindex = scheme_bin_minus(bnindex, scheme_make_integer(LISTREF_BIGNUM_SLICE));
}
}
for (i = 0; i < k; i++) {
if (!SCHEME_PAIRP(lst)) {
char *lstr;
int llen;
lstr = scheme_make_provided_string(argv[0], 2, &llen);
scheme_raise_exn(MZEXN_FAIL_CONTRACT,
"%s: index %s too large for list%s: %t", name,
scheme_make_provided_string(index, 2, NULL),
SCHEME_NULLP(lst) ? "" : " (not a proper list)",
lstr, llen);
return NULL;
}
lst = SCHEME_CDR(lst);
if (!(i & OCCASIONAL_CHECK))
SCHEME_USE_FUEL(OCCASIONAL_CHECK);
}
} while(bnindex);
if (takecar) {
if (!SCHEME_PAIRP(lst)) {
char *lstr;
int llen;
lstr = scheme_make_provided_string(argv[0], 2, &llen);
scheme_raise_exn(MZEXN_FAIL_CONTRACT,
"%s: index %s too large for list%s: %t", name,
scheme_make_provided_string(index, 2, NULL),
SCHEME_NULLP(lst) ? "" : " (not a proper list)",
lstr, llen);
return NULL;
}
return SCHEME_CAR(lst);
} else
return lst;
}
