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complex.pmc
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complex.pmc
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/*
Copyright (C) 2004-2008, The Perl Foundation.
$Id$
=head1 NAME
src/pmc/complex.pmc - Complex Numbers PMC Class
=head1 DESCRIPTION
C<Complex> provides a representation of complex numbers. It handles
string parsing/generating and basic mathematical operations.
=head2 Functions
=over 4
=cut
Equations used are sometimes listed. At times, multiple equations are given,
but those starting with => are the ones used
*/
#include "parrot/parrot.h"
#define RE(obj) (((FLOATVAL*)PMC_struct_val(obj))[0])
#define IM(obj) (((FLOATVAL*)PMC_struct_val(obj))[1])
/*
=item C<static void
complex_parse_string(PARROT_INTERP, FLOATVAL *re, FLOATVAL *im, STRING *value)>
Parses the string in C<value> to produce a complex number, represented
by the real (C<*re>) and imaginary (C<*im>) parts. Raises an exception
if it cannot understand the string. The string should be of the form
C<a+bi> with optional spaces around C<+> and before C<i>. You can also
use C<j> instead of C<i>.
=cut
*/
static void
complex_parse_string(PARROT_INTERP, FLOATVAL *re, FLOATVAL *im, STRING *value) {
INTVAL first_num_length, second_num_length;
STRING *S;
char *str = string_to_cstring(interp, value);
char *t = str;
char *first_num_offset = str;
char *second_num_offset = NULL;
INTVAL i = 0;
INTVAL first_num_minus = 0;
INTVAL second_num_minus = 0;
/* walk the string and identify the real and imaginary parts */
if (*t == '-') {
/* first number is negative */
t++;
first_num_minus = 1;
/* allow for an optional space */
if (*t == ' ')
t++;
first_num_offset = t;
}
/* skip digits */
while (*t >= '0' && *t <= '9')
t++;
if (*t == '.') {
/* this number has a decimal point */
t++;
/* skip digits */
while (*t >= '0' && *t <= '9')
t++;
}
/* save the length of the real part */
first_num_length = t - first_num_offset;
/* end of string; we only have a real part */
if (*t == 0) {
second_num_length = 0;
}
else if ((*t == 'i' || *t == 'j') && *(t+1) == 0) {
/* there is only an imaginary part, so the first number was
actually the imaginary part */
second_num_length = first_num_length;
first_num_length = 0;
second_num_offset = first_num_offset;
second_num_minus = first_num_minus;
first_num_minus = 0;
/* this is useful if there is no number for
the imaginary part, like in "-i" */
i = 1;
}
else {
/* skip an optional space */
if (*t == ' ')
t++;
/* expect "+" or "-" and the imaginary part */
if (*t == '+' || *t == '-') {
/* save the sign */
second_num_minus = (*t == '-');
t++;
/* skip another optional space */
if (*t == ' ')
t++;
/* save the beginning of the imaginary part */
second_num_offset = t;
/* skip digits */
while (*t >= '0' && *t <= '9')
t++;
if (*t == '.') {
/* this number has a decimal point */
t++;
/* skip digits */
while (*t >= '0' && *t <= '9')
t++;
}
/* save the length of the imaginary part */
second_num_length = t - second_num_offset;
/* allow for one more optional space */
if (*t == ' ')
t++;
/* verify that the string ends properly */
if ((*t != 'i' && *t != 'j') || (*(t+1) != 0)) {
/* imaginary part does not end in 'i' or 'j' */
real_exception(interp, NULL, E_ValueError,
"Complex: malformed string");
}
/* this is useful if there is no number for the
imaginary part, like in "2+i" */
i = 1;
/* all is OK, save the number */
}
else {
/* "+" or "-" not found: error */
real_exception(interp, NULL, E_ValueError,
"Complex: malformed string");
}
}
/* now we have the offsets and the lengths we turn them into float values */
if (first_num_length) {
/* there is a real part, interpret it */
S = string_from_cstring(interp, first_num_offset, first_num_length);
*re = string_to_num(interp, S);
}
else {
/* consider the real part 0.0 */
*re = 0.0;
}
if (second_num_length) {
/* there is an imaginary part, interpret it */
S = string_from_cstring(interp, second_num_offset, second_num_length);
*im = string_to_num(interp, S);
}
else {
/* consider the imaginary part 0.0 */
if (i) /* the string was something like "1+i" */
*im = 1.0;
else
*im = 0.0;
}
if (first_num_minus)
*re = -*re;
if (second_num_minus)
*im = -*im;
string_cstring_free(str);
}
/*
=item C<static FLOATVAL*
complex_locate_keyed_num(PARROT_INTERP, PMC *self, STRING *key)>
Interpret the string C<key>; valid keys are C<real> and C<imag>,
representing the real and imaginary parts of the complex number.
=cut
*/
static FLOATVAL*
complex_locate_keyed_num(PARROT_INTERP, PMC *self, STRING *key) {
/* do imag first since real can be read much faster anyway */
STRING *imag = string_from_cstring(interp, "imag", 4);
STRING *real;
if (0 == string_equal(interp, key, imag))
return &IM(self);
real = string_from_cstring(interp, "real", 4);
if (0 == string_equal(interp, key, real))
return &RE(self);
real_exception(interp, NULL, E_KeyError,
"Complex: key is neither 'real' or 'imag'");
}
static void
int_check_divide_zero(PARROT_INTERP, INTVAL value) {
if (value == 0)
real_exception(interp, NULL, E_ZeroDivisionError, "Divide by zero");
}
static void
float_check_divide_zero(PARROT_INTERP, FLOATVAL value) {
if (FLOAT_IS_ZERO(value))
real_exception(interp, NULL, E_ZeroDivisionError, "Divide by zero");
}
static void
complex_check_divide_zero(PARROT_INTERP, PMC *value) {
/* Throw an exception if we are dividing by zero. */
if (FLOAT_IS_ZERO(RE(value)) && FLOAT_IS_ZERO(IM(value)))
real_exception(interp, NULL, E_ZeroDivisionError, "Divide by zero");
}
pmclass Complex {
/*
=item C<PMC *instantiate(PMC *sig)>
Create a new complex PMC with passed arguments according to pdd03.
=cut
*/
VTABLE PMC *instantiate(PMC *sig) {
return PMCNULL;
/* TODO -- really build this thing */
#if 0
PMC *res = pmc_new(INTERP, enum_class_Complex);
FLOATVAL re = 0.0;
FLOATVAL im = 0.0;
int argcI = REG_INT(interp, 1);
int argcS = REG_INT(interp, 2);
int argcP = REG_INT(interp, 3);
int argcN = REG_INT(interp, 4);
/*
* we can only allow 0..2 arguments of one kind. For
* mixed (e.g. N, P) args the order of arguments isn't fixed
*/
if (argcP) {
re = VTABLE_get_number(INTERP, REG_PMC(interp, 5));
if (argcP == 2)
im = VTABLE_get_number(INTERP, REG_PMC(interp, 6));
/* TODO throw exception if argument mismatch */
}
else if (argcN) {
re = REG_NUM(interp, 5);
if (argcN == 2)
im = REG_NUM(interp, 6);
}
else if (argcI) {
re = REG_INT(interp, 5);
if (argcI == 2)
im = REG_INT(interp, 6);
}
else if (argcS == 1) {
complex_parse_string(INTERP, &RE(res), &IM(res), REG_STR(interp, 5));
return res;
}
RE(res) = re;
IM(res) = im;
return res;
#endif
}
/*
=item C<opcode_t *invoke(void *next)>
Pythonic object constructor. SELF is a Complex Class object. Return a new
C<complex> object according to 2.1. Built-in Functions.
=cut
*/
VTABLE opcode_t *invoke(void *next) {
const int argcP = REG_INT(interp, 3);
PMC * const res = pmc_new(INTERP, enum_class_Complex);
if (argcP == 1) {
PMC * const arg = REG_PMC(interp, 5);
if (arg->vtable->base_type == enum_class_String)
VTABLE_set_string_native(INTERP, res, PMC_str_val(arg));
else
RE(res) = VTABLE_get_number(INTERP, arg);
}
else if (argcP == 2) {
RE(res) = VTABLE_get_number(INTERP, REG_PMC(interp, 5));
IM(res) = VTABLE_get_number(INTERP, REG_PMC(interp, 6));
}
REG_PMC(interp, 5) = res;
return (opcode_t *)next;
}
/*
=back
=head2 Methods
=over 4
=item C<void init()>
Initializes the complex number with the value 0+0i.
=item C<void init_pmc(PMC *initializer)>
Initializes the complex number with the specified values.
(not implemented)
=item C<void destroy()>
Cleans up.
=item C<PMC *clone()>
Creates an identical copy of the complex number.
=cut
*/
VTABLE void init() {
/* XXX should check if mem_sys_allocate failed */
FLOATVAL *data =
(FLOATVAL *)mem_sys_allocate(2 * sizeof (FLOATVAL));
PMC_struct_val(SELF) = data;
RE(SELF) = IM(SELF) = 0.0;
PObj_active_destroy_SET(SELF);
}
VTABLE void init_pmc(PMC *initializer) {
/* XXX not implemented */
SELF.init();
}
VTABLE void destroy() {
mem_sys_free(PMC_struct_val(SELF));
PMC_struct_val(SELF) = NULL;
}
VTABLE PMC *clone() {
PMC *dest = pmc_new_noinit(INTERP, SELF->vtable->base_type);
FLOATVAL *data =
(FLOATVAL *)mem_sys_allocate(2 * sizeof (FLOATVAL));
PMC_struct_val(dest) = data;
RE(dest) = RE(SELF);
IM(dest) = IM(SELF);
PObj_active_destroy_SET(dest);
return dest;
}
/*
=item C<INTVAL get_integer()>
Returns the modulus of the complex number as an integer.
=item C<FLOATVAL get_number()>
Returns the modulus of the complex number.
=item C<STRING *get_string()>
Returns the complex number as a string in the form C<a+bi>.
=item C<INTVAL get_bool()>
Returns true if the complex number is non-zero.
=cut
*/
VTABLE INTVAL get_integer() {
FLOATVAL f = SELF.get_number();
return (INTVAL)f;
}
VTABLE FLOATVAL get_number() {
return sqrt(RE(SELF) * RE(SELF) + IM(SELF) * IM(SELF));
}
VTABLE STRING *get_string() {
return Parrot_sprintf_c(INTERP, "%vg%+vgi", RE(SELF), IM(SELF));
}
VTABLE INTVAL get_bool() {
return !(FLOAT_IS_ZERO(RE(SELF)) && FLOAT_IS_ZERO(IM(SELF)));
}
/*
=item C<INTVAL get_integer_keyed(PMC *key)>
=item C<INTVAL get_integer_keyed_str(STRING *key)>
=item C<FLOATVAL get_number_keyed(PMC *key)>
=item C<FLOATVAL get_number_keyed_str(STRING *key)>
=item C<PMC *get_pmc_keyed(PMC *key)>
=item C<PMC *get_pmc_keyed_str(STRING *key)>
Returns the requested number (real part for C<real> and imaginary for C<imag>).
=cut
*/
VTABLE INTVAL get_integer_keyed(PMC *key) {
STRING * const s = VTABLE_get_string(INTERP, key);
return SELF.get_integer_keyed_str(s);
}
VTABLE INTVAL get_integer_keyed_str(STRING *key) {
FLOATVAL f = SELF.get_number_keyed_str(key);
return (INTVAL)f;
}
VTABLE FLOATVAL get_number_keyed(PMC *key) {
STRING * const s = VTABLE_get_string(INTERP, key);
return SELF.get_number_keyed_str(s);
}
VTABLE FLOATVAL get_number_keyed_str(STRING *key) {
const FLOATVAL * const num = complex_locate_keyed_num(INTERP, SELF, key);
if (num)
return *num;
return 0.0;
}
VTABLE PMC *get_pmc_keyed(PMC *key) {
STRING * const s = VTABLE_get_string(INTERP, key);
return SELF.get_pmc_keyed_str(s);
}
VTABLE PMC *get_pmc_keyed_str(STRING *key) {
PMC * const ret = pmc_new(INTERP, enum_class_Float);
const FLOATVAL val = SELF.get_number_keyed_str(key);
VTABLE_set_number_native(INTERP, ret, val);
return ret;
}
/*
=item C<PMC *get_pmc_keyed_int(INTVAL key)>
Returns the requested number (real part for C<0> and imaginary for C<1>).
=cut
*/
VTABLE PMC *get_pmc_keyed_int(INTVAL key) {
PMC * const ret = pmc_new(INTERP, enum_class_Float);
const FLOATVAL val = SELF.get_number_keyed_int(key);
VTABLE_set_number_native(INTERP, ret, val);
return ret;
}
/*
=item C<FLOATVAL get_number_keyed_int(INTVAL key)>
Quick hack to emulate get_real() and get_imag():
key = 0 ... get real part
key = 1 ... get imag part
=item C<void set_number_keyed_int(INTVAL key, FLOATVAL v)>
Set real or imag depending on key
=cut
*/
VTABLE FLOATVAL get_number_keyed_int(INTVAL key) {
switch (key) {
case 0:
return RE(SELF);
case 1:
return IM(SELF);
default:
real_exception(interp, NULL, E_KeyError,
"Complex: key must be 0 or 1");
}
}
VTABLE void set_number_keyed_int(INTVAL key, FLOATVAL v) {
switch (key) {
case 0:
RE(SELF) = v;
break;
case 1:
IM(SELF) = v;
break;
default:
real_exception(interp, NULL, E_KeyError,
"Complex: key must be 0 or 1");
}
}
/*
=item C<void set_string_native(STRING *value)>
Parses the string C<value> into a complex number; raises an exception
on failure.
=item C<void set_pmc(PMC *value)>
if C<value> is a Complex PMC then the complex number is set to its
value; otherwise C<value>'s string representation is parsed with
C<set_string_native()>.
=item C<void set_integer_native(INTVAL value)>
=item C<void set_number_native(FLOATVAL value)>
Sets the real part of the complex number to C<value> and the imaginary
part to C<0.0>
=cut
*/
VTABLE void set_string_native(STRING *value) {
complex_parse_string(INTERP, &RE(SELF), &IM(SELF), value);
}
VTABLE void set_pmc(PMC *value) {
if (value->vtable->base_type == enum_class_Complex) {
RE(SELF) = RE(value);
IM(SELF) = IM(value);
}
else {
SELF.set_string_native(VTABLE_get_string(INTERP, value));
}
}
VTABLE void set_integer_native(INTVAL value) {
SELF.set_number_native(value);
}
VTABLE void set_number_native(FLOATVAL value) {
RE(SELF) = value;
IM(SELF) = 0.0;
}
/*
=item C<void set_integer_keyed(PMC *key, INTVAL value)>
=item C<void set_integer_keyed_str(STRING *key, INTVAL value)>
=item C<void set_number_keyed(PMC *key, FLOATVAL value)>
=item C<void set_number_keyed_str(STRING *key, FLOATVAL value)>
=item C<void set_pmc_keyed(PMC *key, PMC *value)>
=item C<void set_pmc_keyed_str(STRING *key, PMC *value)>
Sets the requested number (real part for C<real> and imaginary for C<imag>)
to C<value>.
=cut
*/
VTABLE void set_integer_keyed(PMC *key, INTVAL value) {
SELF.set_number_keyed(key, value);
}
VTABLE void set_integer_keyed_str(STRING *key, INTVAL value) {
SELF.set_number_keyed_str(key, value);
}
VTABLE void set_number_keyed(PMC *key, FLOATVAL value) {
STRING *s = VTABLE_get_string(INTERP, key);
SELF.set_number_keyed_str(s, value);
}
VTABLE void set_number_keyed_str(STRING *key, FLOATVAL value) {
FLOATVAL * const num = complex_locate_keyed_num(INTERP, SELF, key);
if (num)
*num = value;
}
VTABLE void set_pmc_keyed(PMC *key, PMC *value) {
const FLOATVAL f = VTABLE_get_number(INTERP, value);
SELF.set_number_keyed(key, f);
}
VTABLE void set_pmc_keyed_str(STRING *key, PMC *value) {
const FLOATVAL f = VTABLE_get_number(INTERP, value);
SELF.set_number_keyed_str(key, f);
}
/*
=item C<PMC *add(PMC *value, PMC *dest)>
=item C<PMC *add_int(INTVAL value, PMC *dest)>
=item C<PMC *add_float(FLOATVAL value, PMC *dest)>
Adds C<value> to the complex number, placing the result in C<dest>.
=cut
*/
VTABLE PMC *add(PMC *value, PMC *dest) {
MMD_Complex: {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) + RE(value);
IM(dest) = IM(SELF) + IM(value);
return dest;
}
MMD_DEFAULT: {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) + VTABLE_get_number(INTERP, value);
IM(dest) = IM(SELF);
return dest;
}
}
VTABLE PMC *add_int(INTVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) + value;
IM(dest) = IM(SELF);
return dest;
}
VTABLE PMC *add_float(FLOATVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
RE(dest) = RE(SELF) + value;
IM(dest) = IM(SELF);
return dest;
}
VTABLE void i_add(PMC *value) {
MMD_Complex: {
RE(SELF) += RE(value);
IM(SELF) += IM(value);
}
MMD_DEFAULT: {
RE(SELF) += VTABLE_get_number(INTERP, value);
}
}
VTABLE void i_add_int(INTVAL value) {
RE(SELF) += (FLOATVAL)value;
}
VTABLE void i_add_float(FLOATVAL value) {
RE(SELF) += value;
}
/*
=item C<PMC *subtract(PMC *value, PMC *dest)>
=item C<PMC *subtract_int(INTVAL value, PMC *dest)>
=item C<PMC *subtract_float(FLOATVAL value, PMC *dest)>
Subtracts C<value> from the complex number, placing the result in C<dest>.
=cut
*/
VTABLE PMC *subtract(PMC *value, PMC *dest) {
MMD_Complex: {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) - RE(value);
IM(dest) = IM(SELF) - IM(value);
return dest;
}
MMD_DEFAULT: {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) - VTABLE_get_number(INTERP, value);
IM(dest) = IM(SELF);
return dest;
}
}
VTABLE PMC *subtract_int(INTVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) - value;
IM(dest) = IM(SELF);
return dest;
}
VTABLE PMC *subtract_float(FLOATVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) - value;
IM(dest) = IM(SELF);
return dest;
}
VTABLE void i_subtract(PMC *value) {
MMD_Complex: {
RE(SELF) -= RE(value);
IM(SELF) -= IM(value);
}
MMD_DEFAULT: {
RE(SELF) -= VTABLE_get_number(INTERP, value);
}
}
VTABLE void i_subtract_int(INTVAL value) {
RE(SELF) -= (FLOATVAL)value;
}
VTABLE void i_subtract_float(FLOATVAL value) {
RE(SELF) -= value;
}
/*
=item C<PMC *multiply(PMC *value, PMC *dest)>
=item C<PMC *multiply_int(INTVAL value, PMC *dest)>
=item C<PMC *multiply_float(FLOATVAL value, PMC *dest)>
Multiplies the complex number with C<value>, placing the result in C<dest>.
=item C<void i_multiply(PMC *value)>
=item C<void i_multiply_int(INTVAL value)>
=item C<void i_multiply_float(FLOATVAL value)>
Multiplies the complex number SELF inplace with C<value>.
=cut
*/
/*
TODO for better precision:
(a+ib)(c+id)=(ac-bd)+i((a+b)(c+d)-ac-bd).
(a+bi)(c+di)=(ac-bd)+i(ad+bc)
*/
VTABLE PMC *multiply(PMC *value, PMC *dest) {
MMD_Complex: {
FLOATVAL re = RE(SELF) * RE(value) - IM(SELF) * IM(value);
FLOATVAL im = IM(SELF) * RE(value) + RE(SELF) * IM(value);
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = re;
IM(dest) = im;
return dest;
}
MMD_DEFAULT: {
FLOATVAL re = RE(SELF) * VTABLE_get_number(INTERP, value);
FLOATVAL im = IM(SELF) * VTABLE_get_number(INTERP, value);
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = re;
IM(dest) = im;
return dest;
}
}
VTABLE PMC *multiply_int(INTVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) * value;
IM(dest) = IM(SELF) * value;
return dest;
}
VTABLE PMC *multiply_float(FLOATVAL value, PMC *dest) {
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) * value;
IM(dest) = IM(SELF) * value;
return dest;
}
VTABLE void i_multiply(PMC *value) {
MMD_Complex: {
FLOATVAL re = RE(SELF) * RE(value) - IM(SELF) * IM(value);
FLOATVAL im = IM(SELF) * RE(value) + RE(SELF) * IM(value);
RE(SELF) = re;
IM(SELF) = im;
}
MMD_DEFAULT: {
RE(SELF) *= VTABLE_get_number(INTERP, value);
IM(SELF) *= VTABLE_get_number(INTERP, value);
}
}
VTABLE void i_multiply_int(INTVAL value) {
RE(SELF) *= value;
IM(SELF) *= value;
}
VTABLE void i_multiply_float(FLOATVAL value) {
RE(SELF) *= value;
IM(SELF) *= value;
}
/*
=item C<PMC *divide(PMC *value, PMC *dest)>
=item C<PMC *divide_int(INTVAL value, PMC *dest)>
=item C<PMC *divide_float(FLOATVAL value, PMC *dest)>
Divide the complex number by C<value>, placing the result in C<dest>.
=item C<void i_divide(PMC *value, PMC *dest)>
=item C<void i_divide_int(INTVAL value, PMC *dest)>
=item C<void i_divide_float(FLOATVAL value, PMC *dest)>
Divide the complex number C<SELF> by C<value> inplace.
Throws divide by zero exception if divisor is zero.
=cut
TODO: for better fp precision
http://docs.sun.com/source/806-3568/ncg_goldberg.html
(a+ib)/(c+id) =
(a + b(d/c)) / (c + d(d/c)) + i(b - a(d/c)) / (c + d(d/c)) if |d|<|c|
(b + a(c/d)) / (d + c(c/d)) + i(-a + b(c/d)) / (d + c(c/d)) if |d|>=|c|
*/
VTABLE PMC *divide(PMC *value, PMC *dest) {
MMD_Complex: {
FLOATVAL mod, re, im;
complex_check_divide_zero(INTERP, value);
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
/* a little speed optimisation: cache an intermediate number;
I'm not sure the compiler does this */
if (IM(SELF) == 0.0 && IM(value) == 0.0) {
RE(dest) = RE(SELF) / RE(value);
IM(dest) = 0.0;
return dest;
}
mod = (RE(value) * RE(value) + IM(value) * IM(value));
re = (RE(SELF) * RE(value) + IM(SELF) * IM(value)) / mod;
im = (IM(SELF) * RE(value) - RE(SELF) * IM(value)) / mod;
RE(dest) = re;
IM(dest) = im;
return dest;
}
MMD_DEFAULT: {
FLOATVAL d = VTABLE_get_number(INTERP, value);
float_check_divide_zero(INTERP, d);
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) / d;
IM(dest) = IM(SELF) / d;
return dest;
}
}
VTABLE PMC *divide_int(INTVAL value, PMC *dest) {
int_check_divide_zero(INTERP, value);
if (dest)
VTABLE_morph(INTERP, dest, SELF->vtable->base_type);
else
dest = pmc_new(INTERP, SELF->vtable->base_type);
RE(dest) = RE(SELF) / value;
IM(dest) = IM(SELF) / value;
return dest;
}