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ruby--ruby/complex.c
tadf 597179bb95 adopted the ruby's style. 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15868 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2008-03-31 16:42:24 +00:00

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/*
complex.c: Coded by Tadayoshi Funaba 2008
This implementation is based on Keiju Ishitsuka's Complex library
which is written in ruby.
*/
#include "ruby.h"
#include <math.h>
#define NDEBUG
#include <assert.h>
#ifndef COMPLEX_NAME
#define COMPLEX_NAME "Complex"
#endif
#define ZERO INT2FIX(0)
#define ONE INT2FIX(1)
#define TWO INT2FIX(2)
VALUE rb_cComplex;
static ID id_Unify, id_abs, id_abs2, id_arg, id_atan2_bang, id_cmp,
id_coerce, id_conjugate, id_convert, id_cos, id_denominator, id_divmod,
id_equal_p, id_exact_p, id_exp_bang, id_expt, id_floor, id_format,
id_hypot, id_idiv, id_inspect, id_log_bang, id_negate, id_new, id_new_bang,
id_numerator, id_polar, id_quo, id_scalar_p, id_sin, id_sqrt, id_to_f,
id_to_i, id_to_r, id_to_s, id_truncate;
#define f_boolcast(x) ((x) ? Qtrue : Qfalse)
#define binop(n,op) \
inline static VALUE \
f_##n(VALUE x, VALUE y)\
{\
return rb_funcall(x, op, 1, y);\
}
#define fun1(n) \
inline static VALUE \
f_##n(VALUE x)\
{\
return rb_funcall(x, id_##n, 0);\
}
#define fun2(n) \
inline static VALUE \
f_##n(VALUE x, VALUE y)\
{\
return rb_funcall(x, id_##n, 1, y);\
}
#define math1(n) \
inline static VALUE \
m_##n(VALUE x)\
{\
return rb_funcall(rb_mMath, id_##n, 1, x);\
}
#define math2(n) \
inline static VALUE \
m_##n(VALUE x, VALUE y)\
{\
return rb_funcall(rb_mMath, id_##n, 2, x, y);\
}
inline static VALUE
f_add(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(y)) {
if (FIX2LONG(y) == 0)
r = x;
else
r = rb_funcall(x, '+', 1, y);
} else if (FIXNUM_P(x)) {
if (FIX2LONG(x) == 0)
r = y;
else
r = rb_funcall(x, '+', 1, y);
} else
r = rb_funcall(x, '+', 1, y);
return r;
}
inline static VALUE
f_cmp(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(x) && FIXNUM_P(y)) {
long c = FIX2LONG(x) - FIX2LONG(y);
if (c > 0)
c = 1;
else if (c < 0)
c = -1;
r = INT2FIX(c);
} else
r = rb_funcall(x, id_cmp, 1, y);
return r;
}
inline static VALUE
f_div(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(y) && FIX2LONG(y) == 1)
r = x;
else
r = rb_funcall(x, '/', 1, y);
return r;
}
inline static VALUE
f_gt_p(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(x) && FIXNUM_P(y))
r = f_boolcast(FIX2LONG(x) > FIX2LONG(y));
else
r = rb_funcall(x, '>', 1, y);
return r;
}
inline static VALUE
f_lt_p(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(x) && FIXNUM_P(y))
r = f_boolcast(FIX2LONG(x) < FIX2LONG(y));
else
r = rb_funcall(x, '<', 1, y);
return r;
}
binop(mod, '%')
inline static VALUE
f_mul(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(y)) {
long _iy = FIX2LONG(y);
if (_iy == 0) {
if (TYPE(x) == T_FLOAT)
r = rb_float_new(0.0);
else
r = ZERO;
} else if (_iy == 1)
r = x;
else
r = rb_funcall(x, '*', 1, y);
} else if (FIXNUM_P(x)) {
long _ix = FIX2LONG(x);
if (_ix == 0) {
if (TYPE(y) == T_FLOAT)
r = rb_float_new(0.0);
else
r = ZERO;
} else if (_ix == 1)
r = y;
else
r = rb_funcall(x, '*', 1, y);
} else
r = rb_funcall(x, '*', 1, y);
return r;
}
inline static VALUE
f_sub(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(y)) {
if (FIX2LONG(y) == 0)
r = x;
else
r = rb_funcall(x, '-', 1, y);
} else
r = rb_funcall(x, '-', 1, y);
return r;
}
binop(xor, '^')
fun1(abs)
fun1(abs2)
fun1(arg)
fun1(conjugate)
fun1(denominator)
fun1(exact_p)
fun1(floor)
fun1(inspect)
fun1(negate)
fun1(numerator)
fun1(polar)
fun1(scalar_p)
fun1(to_f)
fun1(to_i)
fun1(to_r)
fun1(to_s)
fun1(truncate)
fun2(coerce)
fun2(divmod)
inline static VALUE
f_equal_p(VALUE x, VALUE y)
{
VALUE r;
if (FIXNUM_P(x) && FIXNUM_P(y))
r = f_boolcast(FIX2LONG(x) == FIX2LONG(y));
else
r = rb_funcall(x, id_equal_p, 1, y);
return r;
}
fun2(expt)
fun2(idiv)
fun2(quo)
inline static VALUE
f_negative_p(VALUE x)
{
VALUE r;
if (FIXNUM_P(x))
r = f_boolcast(FIX2LONG(x) < 0);
else
r = rb_funcall(x, '<', 1, ZERO);
return r;
}
inline static VALUE
f_zero_p(VALUE x)
{
VALUE r;
if (FIXNUM_P(x))
r = f_boolcast(FIX2LONG(x) == 0);
else
r = rb_funcall(x, id_equal_p, 1, ZERO);
return r;
}
inline static VALUE
f_one_p(VALUE x)
{
VALUE r;
if (FIXNUM_P(x))
r = f_boolcast(FIX2LONG(x) == 1);
else
r = rb_funcall(x, id_equal_p, 1, ONE);
return r;
}
inline static VALUE
f_kind_of_p(VALUE x, VALUE c)
{
return rb_obj_is_kind_of(x, c);
}
inline static VALUE
k_numeric_p(VALUE x)
{
return f_kind_of_p(x, rb_cNumeric);
}
inline static VALUE
k_integer_p(VALUE x)
{
return f_kind_of_p(x, rb_cInteger);
}
inline static VALUE
k_float_p(VALUE x)
{
return f_kind_of_p(x, rb_cFloat);
}
inline static VALUE
k_rational_p(VALUE x)
{
return f_kind_of_p(x, rb_cRational);
}
inline static VALUE
k_complex_p(VALUE x)
{
return f_kind_of_p(x, rb_cComplex);
}
inline static VALUE
f_generic_p(VALUE x)
{
switch (TYPE(x)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
return Qtrue;
default:
return Qfalse;
}
}
static VALUE
nucomp_s_generic_p(VALUE klass, VALUE x)
{
return f_generic_p(x);
}
#define get_dat1(x) \
struct RComplex *dat;\
dat = ((struct RComplex *)(x))
#define get_dat2(x,y) \
struct RComplex *adat, *bdat;\
adat = ((struct RComplex *)(x));\
bdat = ((struct RComplex *)(y))
inline static VALUE
nucomp_s_new_internal(VALUE klass, VALUE real, VALUE image)
{
NEWOBJ(obj, struct RComplex);
OBJSETUP(obj, klass, T_COMPLEX);
obj->real = real;
obj->image = image;
return (VALUE)obj;
}
static VALUE
nucomp_s_alloc(VALUE klass)
{
return nucomp_s_new_internal(klass, ZERO, ZERO);
}
static VALUE
nucomp_s_new_bang(int argc, VALUE *argv, VALUE klass)
{
VALUE real, image;
switch (rb_scan_args(argc, argv, "11", &real, &image)) {
case 1:
if (!k_numeric_p(real))
real = f_to_i(real);
image = ZERO;
break;
default:
if (!k_numeric_p(real))
real = f_to_i(real);
if (!k_numeric_p(image))
image = f_to_i(image);
break;
}
return nucomp_s_new_internal(klass, real, image);
}
inline static VALUE
f_complex_new_bang1(VALUE klass, VALUE x)
{
return nucomp_s_new_internal(klass, x, ZERO);
}
inline static VALUE
f_complex_new_bang2(VALUE klass, VALUE x, VALUE y)
{
return nucomp_s_new_internal(klass, x, y);
}
#define f_unify_p(klass) rb_const_defined(klass, id_Unify)
inline static VALUE
nucomp_s_canonicalize_internal(VALUE klass, VALUE real, VALUE image)
{
#define CL_CANON
#ifdef CL_CANON
if (f_zero_p(image) && f_unify_p(klass) &&
!k_float_p(real) && !k_float_p(image))
return real;
#else
if (f_zero_p(image) && f_unify_p(klass))
return real;
#endif
else if (f_scalar_p(real) && f_scalar_p(image))
return nucomp_s_new_internal(klass, real, image);
else if (f_scalar_p(real)) {
get_dat1(image);
return nucomp_s_new_internal(klass,
f_sub(real, dat->image),
f_add(ZERO, dat->real));
} else if (f_scalar_p(image)) {
get_dat1(real);
return nucomp_s_new_internal(klass,
dat->real,
f_add(dat->image, image));
} else {
get_dat2(real, image);
return nucomp_s_new_internal(klass,
f_sub(adat->real, bdat->image),
f_add(adat->image, bdat->real));
}
}
#if 0
static VALUE
nucomp_s_canonicalize(int argc, VALUE *argv, VALUE klass)
{
VALUE real, image;
switch (rb_scan_args(argc, argv, "11", &real, &image)) {
case 1:
image = ZERO;
break;
}
switch (TYPE(real)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
default:
if (!k_rational_p(real))
rb_raise(rb_eArgError, "not a real");
}
switch (TYPE(image)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
default:
if (!k_rational_p(image))
rb_raise(rb_eArgError, "not a real");
}
return nucomp_s_canonicalize_internal(klass, real, image);
}
#endif
static VALUE
nucomp_s_new(int argc, VALUE *argv, VALUE klass)
{
VALUE real, image;
switch (rb_scan_args(argc, argv, "11", &real, &image)) {
case 1:
image = ZERO;
break;
}
switch (TYPE(real)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
default:
if (!k_rational_p(real))
rb_raise(rb_eArgError, "not a real");
}
switch (TYPE(image)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
default:
if (!k_rational_p(image))
rb_raise(rb_eArgError, "not a real");
}
return nucomp_s_canonicalize_internal(klass, real, image);
}
inline static VALUE
f_complex_new1(VALUE klass, VALUE x)
{
assert(!k_complex_p(x));
return nucomp_s_canonicalize_internal(klass, x, ZERO);
}
inline static VALUE
f_complex_new2(VALUE klass, VALUE x, VALUE y)
{
assert(!k_complex_p(x));
return nucomp_s_canonicalize_internal(klass, x, y);
}
static VALUE
nucomp_f_complex(int argc, VALUE *argv, VALUE klass)
{
return rb_funcall2(rb_cComplex, id_convert, argc, argv);
}
#if 1
/* the following code is copied from math.c */
#include <errno.h>
#define Need_Float(x) (x) = rb_Float(x)
#define Need_Float2(x,y) do {\
Need_Float(x);\
Need_Float(y);\
} while (0)
static void
domain_check(double x, char *msg)
{
while(1) {
if (errno) {
rb_sys_fail(msg);
}
if (isnan(x)) {
#if defined(EDOM)
errno = EDOM;
#elif defined(ERANGE)
errno = ERANGE;
#endif
continue;
}
break;
}
}
static VALUE
m_cos_bang(VALUE x)
{
Need_Float(x);
return DOUBLE2NUM(cos(RFLOAT_VALUE(x)));
}
static VALUE m_cos_bang(VALUE);
static VALUE m_cosh_bang(VALUE);
static VALUE m_sin_bang(VALUE);
static VALUE m_sinh_bang(VALUE);
static VALUE
m_cos(VALUE x)
{
get_dat1(x);
if (f_generic_p(x))
return m_cos_bang(x);
else
return f_complex_new2(rb_cComplex,
f_mul(m_cos_bang(dat->real),
m_cosh_bang(dat->image)),
f_mul(f_negate(m_sin_bang(dat->real)),
m_sinh_bang(dat->image)));
}
#ifndef HAVE_COSH
double
cosh(double x)
{
return (exp(x) + exp(-x)) / 2;
}
#endif
static VALUE
m_cosh_bang(VALUE x)
{
Need_Float(x);
return DOUBLE2NUM(cosh(RFLOAT_VALUE(x)));
}
static VALUE
m_exp_bang(VALUE x)
{
Need_Float(x);
return DOUBLE2NUM(exp(RFLOAT_VALUE(x)));
}
static VALUE
m_log_bang(VALUE x)
{
double d;
Need_Float(x);
errno = 0;
d = log(RFLOAT_VALUE(x));
domain_check(d, "log");
return DOUBLE2NUM(d);
}
static VALUE
m_sin_bang(VALUE x)
{
Need_Float(x);
return DOUBLE2NUM(sin(RFLOAT_VALUE(x)));
}
static VALUE
m_sin(VALUE x)
{
get_dat1(x);
if (f_generic_p(x))
return m_sin_bang(x);
else
return f_complex_new2(rb_cComplex,
f_mul(m_sin_bang(dat->real),
m_cosh_bang(dat->image)),
f_mul(m_cos_bang(dat->real),
m_sinh_bang(dat->image)));
}
#ifndef HAVE_SINH
double
sinh(double x)
{
return (exp(x) - exp(-x)) / 2;
}
#endif
static VALUE
m_sinh_bang(VALUE x)
{
Need_Float(x);
return DOUBLE2NUM(sinh(RFLOAT_VALUE(x)));
}
static VALUE
m_sqrt_bang(VALUE x)
{
double d;
Need_Float(x);
errno = 0;
d = sqrt(RFLOAT_VALUE(x));
domain_check(d, "sqrt");
return DOUBLE2NUM(d);
}
static VALUE
m_sqrt(VALUE x)
{
if (f_generic_p(x)) {
if (!f_negative_p(x))
return m_sqrt_bang(x);
else
return f_complex_new2(rb_cComplex, ZERO, m_sqrt_bang(f_negate(x)));
} else {
get_dat1(x);
if (f_negative_p(dat->image))
return f_conjugate(m_sqrt(f_conjugate(x)));
else {
VALUE a = f_abs(x);
return f_complex_new2(rb_cComplex,
m_sqrt_bang(f_div(f_add(a, dat->real), TWO)),
m_sqrt_bang(f_div(f_sub(a, dat->real), TWO)));
}
}
}
static VALUE
m_atan2_bang(VALUE y, VALUE x)
{
Need_Float2(y, x);
return DOUBLE2NUM(atan2(RFLOAT_VALUE(y), RFLOAT_VALUE(x)));
}
#if 0
static VALUE
m_hypot(VALUE x, VALUE y)
{
Need_Float2(x, y);
return DOUBLE2NUM(hypot(RFLOAT_VALUE(x), RFLOAT_VALUE(y)));
}
#endif
#endif
static VALUE
nucomp_s_polar(VALUE klass, VALUE abs, VALUE arg)
{
return f_complex_new2(klass,
f_mul(abs, m_cos(arg)),
f_mul(abs, m_sin(arg)));
}
static VALUE
nucomp_real(VALUE self)
{
get_dat1(self);
return dat->real;
}
static VALUE
nucomp_image(VALUE self)
{
get_dat1(self);
return dat->image;
}
static VALUE
nucomp_add(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
{
get_dat1(self);
return f_complex_new2(CLASS_OF(self),
f_add(dat->real, other), dat->image);
}
case T_COMPLEX:
{
VALUE real, image;
get_dat2(self, other);
real = f_add(adat->real, bdat->real);
image = f_add(adat->image, bdat->image);
return f_complex_new2(CLASS_OF(self), real, image);
}
default:
{
VALUE a = f_coerce(other, self);
return f_add(RARRAY_PTR(a)[0], RARRAY_PTR(a)[1]);
}
}
}
static VALUE
nucomp_sub(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
{
get_dat1(self);
return f_complex_new2(CLASS_OF(self),
f_sub(dat->real, other), dat->image);
}
case T_COMPLEX:
{
VALUE real, image;
get_dat2(self, other);
real = f_sub(adat->real, bdat->real);
image = f_sub(adat->image, bdat->image);
return f_complex_new2(CLASS_OF(self), real, image);
}
default:
{
VALUE a = f_coerce(other, self);
return f_sub(RARRAY_PTR(a)[0], RARRAY_PTR(a)[1]);
}
}
}
static VALUE
nucomp_mul(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
{
get_dat1(self);
return f_complex_new2(CLASS_OF(self),
f_mul(dat->real, other),
f_mul(dat->image, other));
}
case T_COMPLEX:
{
VALUE real, image;
get_dat2(self, other);
real = f_sub(f_mul(adat->real, bdat->real),
f_mul(adat->image, bdat->image));
image = f_add(f_mul(adat->real, bdat->image),
f_mul(adat->image, bdat->real));
return f_complex_new2(CLASS_OF(self), real, image);
}
default:
{
VALUE a = f_coerce(other, self);
return f_mul(RARRAY_PTR(a)[0], RARRAY_PTR(a)[1]);
}
}
}
static VALUE
nucomp_div(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
{
get_dat1(self);
return f_complex_new2(CLASS_OF(self),
f_div(dat->real, other),
f_div(dat->image, other));
}
case T_COMPLEX:
return f_div(f_mul(self, f_conjugate(other)), f_abs2(other));
default:
{
VALUE a = f_coerce(other, self);
return f_div(RARRAY_PTR(a)[0], RARRAY_PTR(a)[1]);
}
}
}
static VALUE
nucomp_rdiv(VALUE self, VALUE other)
{
get_dat1(self);
return f_div(f_complex_new2(CLASS_OF(self),
f_to_r(dat->real),
f_to_r(dat->image)), other);
}
#if 0
static VALUE
nucomp_fdiv(VALUE self, VALUE other)
{
get_dat1(self);
return f_div(f_complex_new2(CLASS_OF(self),
f_to_f(dat->real),
f_to_f(dat->image)), other);
}
#endif
static VALUE
nucomp_expt(VALUE self, VALUE other)
{
if (f_zero_p(other))
return f_complex_new_bang1(CLASS_OF(self), ONE);
if (k_rational_p(other) && f_one_p(f_denominator(other)))
other = f_numerator(other); /* good? */
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
if (f_gt_p(other, ZERO)) {
VALUE x, z, n;
x = self;
z = x;
n = f_sub(other, ONE);
while (!f_zero_p(n)) {
VALUE a;
while (a = f_divmod(n, TWO),
f_zero_p(RARRAY_PTR(a)[1])) {
get_dat1(x);
x = f_complex_new2(CLASS_OF(self),
f_sub(f_mul(dat->real, dat->real),
f_mul(dat->image, dat->image)),
f_mul(f_mul(TWO, dat->real), dat->image));
n = RARRAY_PTR(a)[0];
}
z = f_mul(z, x);
n = f_sub(n, ONE);
}
return z;
} else {
return f_expt(f_div(f_to_r(ONE), self), f_negate(other));
}
case T_FLOAT:
case T_RATIONAL:
{
VALUE a, r, theta;
a = f_polar(self);
r = RARRAY_PTR(a)[0];
theta = RARRAY_PTR(a)[1];
return nucomp_s_polar(CLASS_OF(self), f_expt(r, other),
f_mul(theta, other));
}
case T_COMPLEX:
{
VALUE a, r, theta, ore, oim, nr, ntheta;
get_dat1(other);
a = f_polar(self);
r = RARRAY_PTR(a)[0];
theta = RARRAY_PTR(a)[1];
ore = dat->real;
oim = dat->image;
nr = m_exp_bang(f_sub(f_mul(ore, m_log_bang(r)),
f_mul(oim, theta)));
ntheta = f_add(f_mul(theta, ore), f_mul(oim, m_log_bang(r)));
return nucomp_s_polar(CLASS_OF(self), nr, ntheta);
}
default:
{
VALUE a = f_coerce(other, self);
return f_expt(RARRAY_PTR(a)[0], RARRAY_PTR(a)[1]);
}
}
}
static VALUE
nucomp_equal_p(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
{
get_dat1(self);
return f_boolcast(f_equal_p(dat->real, other) && f_zero_p(dat->image));
}
case T_COMPLEX:
{
get_dat2(self, other);
return f_boolcast(f_equal_p(adat->real, bdat->real) &&
f_equal_p(adat->image, bdat->image));
}
default:
return f_equal_p(other, self);
}
}
static VALUE
nucomp_coerce(VALUE self, VALUE other)
{
switch (TYPE(other)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
case T_RATIONAL:
return rb_assoc_new(f_complex_new_bang1(CLASS_OF(self), other), self);
}
rb_raise(rb_eTypeError, "%s can't be coerced into %s",
rb_obj_classname(other), rb_obj_classname(self));
return Qnil;
}
static VALUE
nucomp_abs(VALUE self)
{
get_dat1(self);
return m_sqrt(f_add(f_mul(dat->real, dat->real),
f_mul(dat->image, dat->image)));
}
static VALUE
nucomp_abs2(VALUE self)
{
get_dat1(self);
return f_add(f_mul(dat->real, dat->real),
f_mul(dat->image, dat->image));
}
static VALUE
nucomp_arg(VALUE self)
{
get_dat1(self);
return m_atan2_bang(dat->image, dat->real);
}
static VALUE
nucomp_polar(VALUE self)
{
return rb_assoc_new(f_abs(self), f_arg(self));
}
static VALUE
nucomp_conjugate(VALUE self)
{
get_dat1(self);
return f_complex_new2(CLASS_OF(self), dat->real, f_negate(dat->image));
}
#if 0
static VALUE
nucomp_real_p(VALUE self)
{
return Qfalse;
}
static VALUE
nucomp_complex_p(VALUE self)
{
return Qtrue;
}
static VALUE
nucomp_exact_p(VALUE self)
{
get_dat1(self);
return f_boolcast(f_exact_p(dat->real) && f_exact_p(dat->image));
}
static VALUE
nucomp_inexact_p(VALUE self)
{
return f_boolcast(!nucomp_exact_p(self));
}
#endif
extern VALUE rb_lcm(VALUE x, VALUE y);
static VALUE
nucomp_denominator(VALUE self)
{
get_dat1(self);
return rb_lcm(f_denominator(dat->real), f_denominator(dat->image));
}
static VALUE
nucomp_numerator(VALUE self)
{
VALUE cd;
get_dat1(self);
cd = f_denominator(self);
return f_complex_new2(CLASS_OF(self),
f_mul(f_numerator(dat->real),
f_div(cd, f_denominator(dat->real))),
f_mul(f_numerator(dat->image),
f_div(cd, f_denominator(dat->image))));
}
static VALUE
nucomp_hash(VALUE self)
{
get_dat1(self);
return f_xor(dat->real, dat->image);
}
#ifndef HAVE_SIGNBIT
#ifdef signbit
#define HAVE_SIGNBIT 1
#endif
#endif
inline static VALUE
f_signbit(VALUE x)
{
switch (TYPE(x)) {
case T_FLOAT:
#ifdef HAVE_SIGNBIT
return f_boolcast(signbit(RFLOAT_VALUE(x)));
#else
{
char s[2];
(void)snprintf(s, sizeof s, "%.0f", RFLOAT_VALUE(x));
return f_boolcast(s[0] == '-');
}
#endif
}
return f_negative_p(x);
}
inline static VALUE
f_tzero_p(VALUE x)
{
return f_boolcast(f_zero_p(x) && !f_signbit(x));
}
inline static VALUE
f_tpositive_p(VALUE x)
{
return f_boolcast(!f_signbit(x));
}
static VALUE
nucomp_to_s(VALUE self)
{
VALUE s, rezero, impos;
get_dat1(self);
rezero = f_tzero_p(dat->real);
impos = f_tpositive_p(dat->image);
if (rezero)
s = rb_str_new2("");
else {
s = f_to_s(dat->real);
rb_str_cat2(s, !impos ? "-" : "+");
}
if (k_rational_p(dat->image) &&
!f_one_p(f_denominator(dat->image))) {
rb_str_cat2(s, "(");
rb_str_concat(s, f_to_s(rezero ? dat->image : f_abs(dat->image)));
rb_str_cat2(s, ")i");
} else {
rb_str_concat(s, f_to_s(rezero ? dat->image : f_abs(dat->image)));
rb_str_cat2(s, "i");
}
return s;
}
static VALUE
nucomp_inspect(VALUE self)
{
VALUE s;
get_dat1(self);
s = rb_str_new2("Complex(");
rb_str_concat(s, f_inspect(dat->real));
rb_str_cat2(s, ", ");
rb_str_concat(s, f_inspect(dat->image));
rb_str_cat2(s, ")");
return s;
}
static VALUE
nucomp_marshal_dump(VALUE self)
{
get_dat1(self);
return rb_assoc_new(dat->real, dat->image);
}
static VALUE
nucomp_marshal_load(VALUE self, VALUE a)
{
get_dat1(self);
dat->real = RARRAY_PTR(a)[0];
dat->image = RARRAY_PTR(a)[1];
return self;
}
/* --- */
VALUE
rb_complex_raw(VALUE x, VALUE y)
{
return nucomp_s_new_internal(rb_cComplex, x, y);
}
VALUE
rb_complex_new(VALUE x, VALUE y)
{
return nucomp_s_canonicalize_internal(rb_cComplex, x, y);
}
static VALUE nucomp_s_convert(int argc, VALUE *argv, VALUE klass);
VALUE
rb_Complex(VALUE x, VALUE y)
{
VALUE a[2];
a[0] = x;
a[1] = y;
return nucomp_s_convert(2, a, rb_cComplex);
}
static VALUE
nucomp_scalar_p(VALUE self)
{
return Qfalse;
}
static VALUE
nucomp_to_i(VALUE self)
{
get_dat1(self);
if (k_float_p(dat->image) || !f_zero_p(dat->image)) {
VALUE s = f_to_s(self);
rb_raise(rb_eRangeError, "can't convert %s into Integer",
StringValuePtr(s));
}
return f_to_i(dat->real);
}
static VALUE
nucomp_to_f(VALUE self)
{
get_dat1(self);
if (k_float_p(dat->image) || !f_zero_p(dat->image)) {
VALUE s = f_to_s(self);
rb_raise(rb_eRangeError, "can't convert %s into Integer",
StringValuePtr(s));
}
return f_to_f(dat->real);
}
static VALUE
nucomp_to_r(VALUE self)
{
get_dat1(self);
if (k_float_p(dat->image) || !f_zero_p(dat->image)) {
VALUE s = f_to_s(self);
rb_raise(rb_eRangeError, "can't convert %s into Integer",
StringValuePtr(s));
}
return f_to_r(dat->real);
}
static VALUE
nilclass_to_c(VALUE self)
{
return rb_complex_new1(INT2FIX(0));
}
static VALUE
numeric_to_c(VALUE self)
{
return rb_complex_new1(self);
}
static VALUE comp_pat1, comp_pat2, a_slash, a_dot_and_an_e,
image_garbages_pat, null_string, underscores_pat, an_underscore;
#define DIGITS "(?:\\d(?:_\\d|\\d)*)"
#define NUMERATOR "(?:" DIGITS "?\\.)?" DIGITS "(?:[eE][-+]?" DIGITS ")?"
#define DENOMINATOR "[-+]?" DIGITS
#define NUMBER "[-+]?" NUMERATOR "(?:\\/" DENOMINATOR ")?"
#define NUMBERNOS NUMERATOR "(?:\\/" DENOMINATOR ")?"
#define PATTERN1 "\\A(" NUMBER "|\\(" NUMBER "\\))[iIjJ]"
#define PATTERN2 "\\A(" NUMBER ")([-+](?:" NUMBERNOS "|\\(" NUMBER "\\))[iIjJ])?"
static void
make_patterns(void)
{
static char comp_pat1_source[] = PATTERN1;
static char comp_pat2_source[] = PATTERN2;
static char image_garbages_pat_source[] = "[+\\(\\)iIjJ]";
static char underscores_pat_source[] = "_+";
comp_pat1 = rb_reg_new(comp_pat1_source, sizeof comp_pat1_source - 1, 0);
rb_global_variable(&comp_pat1);
comp_pat2 = rb_reg_new(comp_pat2_source, sizeof comp_pat2_source - 1, 0);
rb_global_variable(&comp_pat2);
a_slash = rb_str_new2("/");
rb_global_variable(&a_slash);
a_dot_and_an_e = rb_str_new2(".eE");
rb_global_variable(&a_dot_and_an_e);
image_garbages_pat = rb_reg_new(image_garbages_pat_source,
sizeof image_garbages_pat_source - 1, 0);
rb_global_variable(&image_garbages_pat);
null_string = rb_str_new2("");
rb_global_variable(&null_string);
underscores_pat = rb_reg_new(underscores_pat_source,
sizeof underscores_pat_source - 1, 0);
rb_global_variable(&underscores_pat);
an_underscore = rb_str_new2("_");
rb_global_variable(&an_underscore);
}
#define id_strip rb_intern("strip")
#define f_strip(x) rb_funcall(x, id_strip, 0)
#define id_match rb_intern("match")
#define f_match(x,y) rb_funcall(x, id_match, 1, y)
#define id_aref rb_intern("[]")
#define f_aref(x,y) rb_funcall(x, id_aref, 1, y)
#define id_post_match rb_intern("post_match")
#define f_post_match(x) rb_funcall(x, id_post_match, 0)
#define id_split rb_intern("split")
#define f_split(x,y) rb_funcall(x, id_split, 1, y)
#define id_include_p rb_intern("include?")
#define f_include_p(x,y) rb_funcall(x, id_include_p, 1, y)
#define id_count rb_intern("count")
#define f_count(x,y) rb_funcall(x, id_count, 1, y)
#define id_gsub_bang rb_intern("gsub!")
#define f_gsub_bang(x,y,z) rb_funcall(x, id_gsub_bang, 2, y, z)
static VALUE
string_to_c_internal(VALUE self)
{
VALUE s;
s = f_strip(self);
if (RSTRING_LEN(s) == 0)
return rb_assoc_new(Qnil, self);
{
VALUE m, sr, si, re, r, i;
m = f_match(comp_pat1, s);
if (!NIL_P(m)) {
sr = Qnil;
si = f_aref(m, INT2FIX(1));
re = f_post_match(m);
}
if (NIL_P(m)) {
m = f_match(comp_pat2, s);
if (NIL_P(m))
return rb_assoc_new(Qnil, self);
sr = f_aref(m, INT2FIX(1));
si = f_aref(m, INT2FIX(2));
re = f_post_match(m);
}
r = INT2FIX(0);
i = INT2FIX(0);
if (!NIL_P(sr)) {
if (f_include_p(sr, a_slash))
r = f_to_r(sr);
else if (f_gt_p(f_count(sr, a_dot_and_an_e), INT2FIX(0)))
r = f_to_f(sr);
else
r = f_to_i(sr);
}
if (!NIL_P(si)) {
f_gsub_bang(si, image_garbages_pat, null_string);
if (f_include_p(si, a_slash))
i = f_to_r(si);
else if (f_gt_p(f_count(si, a_dot_and_an_e), INT2FIX(0)))
i = f_to_f(si);
else
i = f_to_i(si);
}
return rb_assoc_new(rb_complex_new2(r, i), re);
}
}
static VALUE
string_to_c_strict(VALUE self)
{
VALUE a = string_to_c_internal(self);
if (NIL_P(RARRAY_PTR(a)[0]) || RSTRING_LEN(RARRAY_PTR(a)[1]) > 0) {
VALUE s = f_inspect(self);
rb_raise(rb_eArgError, "invalid value for Complex: %s",
StringValuePtr(s));
}
return RARRAY_PTR(a)[0];
}
#define id_gsub rb_intern("gsub")
#define f_gsub(x,y,z) rb_funcall(x, id_gsub, 2, y, z)
static VALUE
string_to_c(VALUE self)
{
VALUE s = f_gsub(self, underscores_pat, an_underscore);
VALUE a = string_to_c_internal(s);
if (!NIL_P(RARRAY_PTR(a)[0]))
return RARRAY_PTR(a)[0];
return rb_complex_new1(INT2FIX(0));
}
static VALUE
nucomp_s_convert(int argc, VALUE *argv, VALUE klass)
{
VALUE a1, a2;
a1 = Qnil;
a2 = Qnil;
rb_scan_args(argc, argv, "02", &a1, &a2);
switch (TYPE(a1)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
case T_STRING:
a1 = string_to_c_strict(a1);
break;
}
switch (TYPE(a2)) {
case T_FIXNUM:
case T_BIGNUM:
case T_FLOAT:
break;
case T_STRING:
a2 = string_to_c_strict(a2);
break;
}
switch (TYPE(a1)) {
case T_COMPLEX:
{
get_dat1(a1);
if (!k_float_p(dat->image) && f_zero_p(dat->image))
a1 = dat->real;
}
}
switch (TYPE(a2)) {
case T_COMPLEX:
{
get_dat1(a2);
if (!k_float_p(dat->image) && f_zero_p(dat->image))
a2 = dat->real;
}
}
switch (TYPE(a1)) {
case T_COMPLEX:
if (NIL_P(a2) || f_zero_p(a2))
return a1;
}
{
VALUE argv2[2];
argv2[0] = a1;
argv2[1] = a2;
return nucomp_s_new(argc, argv2, klass);
}
}
/* --- */
#define id_Complex rb_intern("Complex")
static VALUE
numeric_re(VALUE self)
{
return rb_Complex1(self);
}
static VALUE
numeric_im(VALUE self)
{
return rb_Complex2(ZERO, self);
}
static VALUE
numeric_real(VALUE self)
{
return self;
}
static VALUE
numeric_image(VALUE self)
{
return INT2FIX(0);
}
#define id_PI rb_intern("PI")
static VALUE
numeric_arg(VALUE self)
{
if (!f_negative_p(self))
return INT2FIX(0);
return rb_const_get(rb_mMath, id_PI);
}
static VALUE
numeric_polar(VALUE self)
{
return rb_assoc_new(f_abs(self), f_arg(self));
}
static VALUE
numeric_conjugate(VALUE self)
{
return self;
}
void
Init_Complex(void)
{
assert(fprintf(stderr, "assert() is now active\n"));
id_Unify = rb_intern("Unify");
id_abs = rb_intern("abs");
id_abs2 = rb_intern("abs2");
id_arg = rb_intern("arg");
id_atan2_bang = rb_intern("atan2!");
id_cmp = rb_intern("<=>");
id_coerce = rb_intern("coerce");
id_conjugate = rb_intern("conjugate");
id_convert = rb_intern("convert");
id_cos = rb_intern("cos");
id_denominator = rb_intern("denominator");
id_divmod = rb_intern("divmod");
id_equal_p = rb_intern("==");
id_exact_p = rb_intern("exact?");
id_exp_bang = rb_intern("exp!");
id_expt = rb_intern("**");
id_floor = rb_intern("floor");
id_format = rb_intern("format");
id_hypot = rb_intern("hypot");
id_idiv = rb_intern("div");
id_inspect = rb_intern("inspect");
id_log_bang = rb_intern("log!");
id_negate = rb_intern("-@");
id_new = rb_intern("new");
id_new_bang = rb_intern("new!");
id_numerator = rb_intern("numerator");
id_polar = rb_intern("polar");
id_quo = rb_intern("quo");
id_scalar_p = rb_intern("scalar?");
id_sin = rb_intern("sin");
id_sqrt = rb_intern("sqrt");
id_to_f = rb_intern("to_f");
id_to_i = rb_intern("to_i");
id_to_r = rb_intern("to_r");
id_to_s = rb_intern("to_s");
id_truncate = rb_intern("truncate");
rb_cComplex = rb_define_class(COMPLEX_NAME, rb_cNumeric);
rb_define_alloc_func(rb_cComplex, nucomp_s_alloc);
rb_funcall(rb_cComplex, rb_intern("private_class_method"), 1,
ID2SYM(rb_intern("allocate")));
rb_define_singleton_method(rb_cComplex, "generic?", nucomp_s_generic_p, 1);
rb_define_singleton_method(rb_cComplex, "new!", nucomp_s_new_bang, -1);
rb_funcall(rb_cComplex, rb_intern("private_class_method"), 1,
ID2SYM(rb_intern("new!")));
rb_define_singleton_method(rb_cComplex, "new", nucomp_s_new, -1);
rb_funcall(rb_cComplex, rb_intern("private_class_method"), 1,
ID2SYM(rb_intern("new")));
#if 0
rb_define_singleton_method(rb_cComplex, "rect", nucomp_s_new, -1);
rb_define_singleton_method(rb_cComplex, "rectangular", nucomp_s_new, -1);
#endif
rb_define_singleton_method(rb_cComplex, "polar", nucomp_s_polar, 2);
rb_define_global_function(COMPLEX_NAME, nucomp_f_complex, -1);
rb_undef_method(rb_cComplex, "<");
rb_undef_method(rb_cComplex, "<=");
rb_undef_method(rb_cComplex, "<=>");
rb_undef_method(rb_cComplex, ">");
rb_undef_method(rb_cComplex, ">=");
rb_undef_method(rb_cComplex, "between?");
rb_undef_method(rb_cComplex, "divmod");
rb_undef_method(rb_cComplex, "floor");
rb_undef_method(rb_cComplex, "ceil");
rb_undef_method(rb_cComplex, "modulo");
rb_undef_method(rb_cComplex, "round");
rb_undef_method(rb_cComplex, "step");
rb_undef_method(rb_cComplex, "truncate");
#if NUBY
rb_undef_method(rb_cComplex, "//");
#endif
rb_define_method(rb_cComplex, "real", nucomp_real, 0);
rb_define_method(rb_cComplex, "image", nucomp_image, 0);
rb_define_method(rb_cComplex, "imag", nucomp_image, 0);
rb_define_method(rb_cComplex, "+", nucomp_add, 1);
rb_define_method(rb_cComplex, "-", nucomp_sub, 1);
rb_define_method(rb_cComplex, "*", nucomp_mul, 1);
rb_define_method(rb_cComplex, "/", nucomp_div, 1);
rb_define_method(rb_cComplex, "quo", nucomp_rdiv, 1);
rb_define_method(rb_cComplex, "rdiv", nucomp_rdiv, 1);
rb_define_method(rb_cComplex, "fdiv", nucomp_rdiv, 1);
rb_define_method(rb_cComplex, "**", nucomp_expt, 1);
rb_define_method(rb_cComplex, "==", nucomp_equal_p, 1);
rb_define_method(rb_cComplex, "coerce", nucomp_coerce, 1);
rb_define_method(rb_cComplex, "abs", nucomp_abs, 0);
#if 0
rb_define_method(rb_cComplex, "magnitude", nucomp_abs, 0);
#endif
rb_define_method(rb_cComplex, "abs2", nucomp_abs2, 0);
rb_define_method(rb_cComplex, "arg", nucomp_arg, 0);
rb_define_method(rb_cComplex, "angle", nucomp_arg, 0);
rb_define_method(rb_cComplex, "polar", nucomp_polar, 0);
rb_define_method(rb_cComplex, "conjugate", nucomp_conjugate, 0);
rb_define_method(rb_cComplex, "conj", nucomp_conjugate, 0);
#if 0
rb_define_method(rb_cComplex, "~", nucomp_conjugate, 0); /* gcc */
#endif
#if 0
rb_define_method(rb_cComplex, "real?", nucomp_real_p, 0);
rb_define_method(rb_cComplex, "complex?", nucomp_complex_p, 0);
rb_define_method(rb_cComplex, "exact?", nucomp_exact_p, 0);
rb_define_method(rb_cComplex, "inexact?", nucomp_inexact_p, 0);
#endif
rb_define_method(rb_cComplex, "numerator", nucomp_numerator, 0);
rb_define_method(rb_cComplex, "denominator", nucomp_denominator, 0);
rb_define_method(rb_cComplex, "hash", nucomp_hash, 0);
rb_define_method(rb_cComplex, "to_s", nucomp_to_s, 0);
rb_define_method(rb_cComplex, "inspect", nucomp_inspect, 0);
rb_define_method(rb_cComplex, "marshal_dump", nucomp_marshal_dump, 0);
rb_define_method(rb_cComplex, "marshal_load", nucomp_marshal_load, 1);
/* --- */
rb_define_method(rb_cComplex, "scalar?", nucomp_scalar_p, 0);
rb_define_method(rb_cComplex, "to_i", nucomp_to_i, 0);
rb_define_method(rb_cComplex, "to_f", nucomp_to_f, 0);
rb_define_method(rb_cComplex, "to_r", nucomp_to_r, 0);
rb_define_method(rb_cNilClass, "to_c", nilclass_to_c, 0);
rb_define_method(rb_cNumeric, "to_c", numeric_to_c, 0);
make_patterns();
rb_define_method(rb_cString, "to_c", string_to_c, 0);
rb_define_singleton_method(rb_cComplex, "convert", nucomp_s_convert, -1);
rb_funcall(rb_cComplex, rb_intern("private_class_method"), 1,
ID2SYM(rb_intern("convert")));
/* --- */
rb_define_method(rb_cNumeric, "re", numeric_re, 0);
rb_define_method(rb_cNumeric, "im", numeric_im, 0);
rb_define_method(rb_cNumeric, "real", numeric_real, 0);
rb_define_method(rb_cNumeric, "image", numeric_image, 0);
rb_define_method(rb_cNumeric, "imag", numeric_image, 0);
rb_define_method(rb_cNumeric, "arg", numeric_arg, 0);
rb_define_method(rb_cNumeric, "angle", numeric_arg, 0);
rb_define_method(rb_cNumeric, "polar", numeric_polar, 0);
rb_define_method(rb_cNumeric, "conjugate", numeric_conjugate, 0);
rb_define_method(rb_cNumeric, "conj", numeric_conjugate, 0);
rb_define_const(rb_cComplex, "I",
f_complex_new_bang2(rb_cComplex, ZERO, ONE));
}
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