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- /* Complex object implementation */
-
- /* Borrows heavily from floatobject.c */
-
- #ifndef WITHOUT_COMPLEX
-
- #include "allobjects.h"
- #include "modsupport.h"
- #include "protos/complexobject_protos.h"
- #include <errno.h>
- #include "mymath.h"
-
- #ifdef i860
- /* Cray APP has bogus definition of HUGE_VAL in <math.h> */
- #undef HUGE_VAL
- #endif
-
- #ifdef HUGE_VAL
- #define CHECK(x) if (errno != 0) ; \
- else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \
- else errno = ERANGE
- #else
- #define CHECK(x) /* Don't know how to check */
- #endif
-
- #ifdef HAVE_LIMITS_H
- #include <limits.h>
- #endif
-
- #ifndef LONG_MAX
- #define LONG_MAX 0X7FFFFFFFL
- #endif
-
- #ifndef LONG_MIN
- #define LONG_MIN (-LONG_MAX-1)
- #endif
-
- #ifdef __NeXT__
- #ifdef __sparc__
- /*
- * This works around a bug in the NS/Sparc 3.3 pre-release
- * limits.h header file.
- * 10-Feb-1995 bwarsaw@cnri.reston.va.us
- */
- #undef LONG_MIN
- #define LONG_MIN (-LONG_MAX-1)
- #endif
- #endif
-
- #if !defined(__STDC__) && !defined(macintosh)
- extern double fmod PROTO((double, double));
- extern double pow PROTO((double, double));
- #endif
-
-
- /* elementary operations on complex numbers */
-
- static int c_error;
- static Py_complex c_1 = {1., 0.};
-
- Py_complex c_sum(a,b)
- Py_complex a,b;
- {
- Py_complex r;
- r.real = a.real + b.real;
- r.imag = a.imag + b.imag;
- return r;
- }
-
- Py_complex c_diff(a,b)
- Py_complex a,b;
- {
- Py_complex r;
- r.real = a.real - b.real;
- r.imag = a.imag - b.imag;
- return r;
- }
-
- Py_complex c_neg(a)
- Py_complex a;
- {
- Py_complex r;
- r.real = -a.real;
- r.imag = -a.imag;
- return r;
- }
-
- Py_complex c_prod(a,b)
- Py_complex a,b;
- {
- Py_complex r;
- r.real = a.real*b.real - a.imag*b.imag;
- r.imag = a.real*b.imag + a.imag*b.real;
- return r;
- }
-
- Py_complex c_quot(a,b)
- Py_complex a,b;
- {
- Py_complex r;
- double d = b.real*b.real + b.imag*b.imag;
- if (d == 0.)
- c_error = 1;
- r.real = (a.real*b.real + a.imag*b.imag)/d;
- r.imag = (a.imag*b.real - a.real*b.imag)/d;
- return r;
- }
-
- Py_complex c_pow(a,b)
- Py_complex a,b;
- {
- Py_complex r;
- double vabs,len,at,phase;
- if (b.real == 0. && b.imag == 0.) {
- r.real = 1.;
- r.imag = 0.;
- }
- else if (a.real == 0. && a.imag == 0.) {
- if (b.imag != 0. || b.real < 0.)
- c_error = 2;
- r.real = 0.;
- r.imag = 0.;
- }
- else {
- vabs = hypot(a.real,a.imag);
- len = pow(vabs,b.real);
- at = atan2(a.imag, a.real);
- phase = at*b.real;
- if (b.imag != 0.0) {
- len /= exp(at*b.imag);
- phase += b.imag*log(vabs);
- }
- r.real = len*cos(phase);
- r.imag = len*sin(phase);
- }
- return r;
- }
-
- static Py_complex c_powu(x, n)
- Py_complex x;
- long n;
- {
- Py_complex r, p;
- long mask = 1;
- r = c_1;
- p = x;
- while (mask > 0 && n >= mask) {
- if (n & mask)
- r = c_prod(r,p);
- mask <<= 1;
- p = c_prod(p,p);
- }
- return r;
- }
-
- static Py_complex c_powi(x, n)
- Py_complex x;
- long n;
- {
- Py_complex cn;
-
- if (n > 100 || n < -100) {
- cn.real = (double) n;
- cn.imag = 0.;
- return c_pow(x,cn);
- }
- else if (n > 0)
- return c_powu(x,n);
- else
- return c_quot(c_1,c_powu(x,-n));
-
- }
-
- PyObject *
- PyComplex_FromCComplex(cval)
- Py_complex cval;
- {
- register complexobject *op =
- (complexobject *) malloc(sizeof(complexobject));
- if (op == NULL)
- return err_nomem();
- op->ob_type = &Complextype;
- op->cval = cval;
- NEWREF(op);
- return (object *) op;
- }
-
- PyObject *
- PyComplex_FromDoubles(real, imag)
- double real, imag;
- {
- Py_complex c;
- c.real = real;
- c.imag = imag;
- return PyComplex_FromCComplex(c);
- }
-
- double
- PyComplex_RealAsDouble(op)
- PyObject *op;
- {
- if (PyComplex_Check(op)) {
- return ((PyComplexObject *)op)->cval.real;
- } else {
- return PyFloat_AsDouble(op);
- }
- }
-
- double
- PyComplex_ImagAsDouble(op)
- PyObject *op;
- {
- if (PyComplex_Check(op)) {
- return ((PyComplexObject *)op)->cval.imag;
- } else {
- return 0.0;
- }
- }
-
- Py_complex
- PyComplex_AsCComplex(op)
- PyObject *op;
- {
- Py_complex cv;
- if (PyComplex_Check(op)) {
- return ((PyComplexObject *)op)->cval;
- } else {
- cv.real = PyFloat_AsDouble(op);
- cv.imag = 0.;
- return cv;
- }
- }
-
- static void
- complex_dealloc(op)
- object *op;
- {
- DEL(op);
- }
-
-
- static void
- complex_buf_repr(buf, v)
- char *buf;
- complexobject *v;
- {
- if (v->cval.real == 0.)
- sprintf(buf, "%.12gj", v->cval.imag);
- else
- sprintf(buf, "(%.12g%+.12gj)", v->cval.real, v->cval.imag);
- }
-
- static int
- complex_print(v, fp, flags)
- complexobject *v;
- FILE *fp;
- int flags; /* Not used but required by interface */
- {
- char buf[100];
- complex_buf_repr(buf, v);
- fputs(buf, fp);
- return 0;
- }
-
- static object *
- complex_repr(v)
- complexobject *v;
- {
- char buf[100];
- complex_buf_repr(buf, v);
- return newstringobject(buf);
- }
-
- static int
- complex_compare(v, w)
- complexobject *v, *w;
- {
- /* Note: "greater" and "smaller" have no meaning for complex numbers,
- but Python requires that they be defined nevertheless. */
- Py_complex i, j;
- i = v->cval;
- j = w->cval;
- if (i.real == j.real && i.imag == j.imag)
- return 0;
- else if (i.real != j.real)
- return (i.real < j.real) ? -1 : 1;
- else
- return (i.imag < j.imag) ? -1 : 1;
- }
-
- static long
- complex_hash(v)
- complexobject *v;
- {
- double intpart, fractpart;
- int expo;
- long x;
- /* This is designed so that Python numbers with the same
- value hash to the same value, otherwise comparisons
- of mapping keys will turn out weird */
-
- #ifdef MPW /* MPW C modf expects pointer to extended as second argument */
- {
- extended e;
- fractpart = modf(v->cval.real, &e);
- intpart = e;
- }
- #else
- fractpart = modf(v->cval.real, &intpart);
- #endif
-
- if (fractpart == 0.0) {
- if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) {
- /* Convert to long int and use its hash... */
- object *w = dnewlongobject(v->cval.real);
- if (w == NULL)
- return -1;
- x = hashobject(w);
- DECREF(w);
- return x;
- }
- x = (long)intpart;
- }
- else {
- fractpart = frexp(fractpart, &expo);
- fractpart = fractpart*2147483648.0; /* 2**31 */
- x = (long) (intpart + fractpart) ^ expo; /* Rather arbitrary */
- }
- if (x == -1)
- x = -2;
- return x;
- }
-
- static object *
- complex_add(v, w)
- complexobject *v;
- complexobject *w;
- {
- return newcomplexobject(c_sum(v->cval,w->cval));
- }
-
- static object *
- complex_sub(v, w)
- complexobject *v;
- complexobject *w;
- {
- return newcomplexobject(c_diff(v->cval,w->cval));
- }
-
- static object *
- complex_mul(v, w)
- complexobject *v;
- complexobject *w;
- {
- return newcomplexobject(c_prod(v->cval,w->cval));
- }
-
- static object *
- complex_div(v, w)
- complexobject *v;
- complexobject *w;
- {
- Py_complex quot;
- c_error = 0;
- quot = c_quot(v->cval,w->cval);
- if (c_error == 1) {
- err_setstr(ZeroDivisionError, "complex division");
- return NULL;
- }
- return newcomplexobject(quot);
- }
-
- static object *
- complex_remainder(v, w)
- complexobject *v;
- complexobject *w;
- {
- Py_complex div, mod;
- c_error = 0;
- div = c_quot(v->cval,w->cval); /* The raw divisor value. */
- if (c_error == 1) {
- err_setstr(ZeroDivisionError, "complex remainder");
- return NULL;
- }
- div.real = floor(div.real); /* Use the floor of the real part. */
- div.imag = 0.0;
- mod = c_diff(v->cval, c_prod(w->cval, div));
-
- return newcomplexobject(mod);
- }
-
-
- static object *
- complex_divmod(v, w)
- complexobject *v;
- complexobject *w;
- {
- Py_complex div, mod;
- PyObject *d, *m, *z;
- c_error = 0;
- div = c_quot(v->cval,w->cval); /* The raw divisor value. */
- if (c_error == 1) {
- err_setstr(ZeroDivisionError, "complex divmod()");
- return NULL;
- }
- div.real = floor(div.real); /* Use the floor of the real part. */
- div.imag = 0.0;
- mod = c_diff(v->cval, c_prod(w->cval, div));
- d = newcomplexobject(div);
- m = newcomplexobject(mod);
- z = mkvalue("(OO)", d, m);
- Py_XDECREF(d);
- Py_XDECREF(m);
- return z;
- }
-
- static object *
- complex_pow(v, w, z)
- complexobject *v;
- object *w;
- complexobject *z;
- {
- Py_complex p;
- Py_complex exponent;
- long int_exponent;
-
- if ((object *)z!=None) {
- err_setstr(ValueError, "complex modulo");
- return NULL;
- }
-
- c_error = 0;
- exponent = ((complexobject*)w)->cval;
- int_exponent = (long)exponent.real;
- if (exponent.imag == 0. && exponent.real == int_exponent)
- p = c_powi(v->cval,int_exponent);
- else
- p = c_pow(v->cval,exponent);
-
- if (c_error == 2) {
- err_setstr(ValueError, "0.0 to a negative or complex power");
- return NULL;
- }
-
- return newcomplexobject(p);
- }
-
- static object *
- complex_neg(v)
- complexobject *v;
- {
- Py_complex neg;
- neg.real = -v->cval.real;
- neg.imag = -v->cval.imag;
- return newcomplexobject(neg);
- }
-
- static object *
- complex_pos(v)
- complexobject *v;
- {
- INCREF(v);
- return (object *)v;
- }
-
- static object *
- complex_abs(v)
- complexobject *v;
- {
- return newfloatobject(hypot(v->cval.real,v->cval.imag));
- }
-
- static int
- complex_nonzero(v)
- complexobject *v;
- {
- return v->cval.real != 0.0 && v->cval.imag != 0.0;
- }
-
- static int
- complex_coerce(pv, pw)
- object **pv;
- object **pw;
- {
- Py_complex cval;
- cval.imag = 0.;
- if (is_intobject(*pw)) {
- cval.real = (double)getintvalue(*pw);
- *pw = newcomplexobject(cval);
- INCREF(*pv);
- return 0;
- }
- else if (is_longobject(*pw)) {
- cval.real = dgetlongvalue(*pw);
- *pw = newcomplexobject(cval);
- INCREF(*pv);
- return 0;
- }
- else if (is_floatobject(*pw)) {
- cval.real = getfloatvalue(*pw);
- *pw = newcomplexobject(cval);
- INCREF(*pv);
- return 0;
- }
- return 1; /* Can't do it */
- }
-
- static object *
- complex_int(v)
- object *v;
- {
- err_setstr(TypeError,
- "can't convert complex to int; use e.g. int(abs(z))");
- return NULL;
- }
-
- static object *
- complex_long(v)
- object *v;
- {
- err_setstr(TypeError,
- "can't convert complex to long; use e.g. long(abs(z))");
- return NULL;
- }
-
- static object *
- complex_float(v)
- object *v;
- {
- err_setstr(TypeError,
- "can't convert complex to float; use e.g. abs(z)");
- return NULL;
- }
-
-
- static object *
- complex_new(self, args)
- object *self;
- object *args;
- {
- Py_complex cval;
-
- cval.imag = 0.;
- if (!PyArg_ParseTuple(args, "d|d", &cval.real, &cval.imag))
- return NULL;
- return newcomplexobject(cval);
- }
-
- static object *
- complex_conjugate(self)
- object *self;
- {
- Py_complex c;
- c = ((complexobject *)self)->cval;
- c.imag = -c.imag;
- return newcomplexobject(c);
- }
-
- static PyMethodDef complex_methods[] = {
- {"conjugate", (PyCFunction)complex_conjugate, 1},
- {NULL, NULL} /* sentinel */
- };
-
-
- static object *
- complex_getattr(self, name)
- complexobject *self;
- char *name;
- {
- Py_complex cval;
- if (strcmp(name, "real") == 0)
- return (object *)newfloatobject(self->cval.real);
- else if (strcmp(name, "imag") == 0)
- return (object *)newfloatobject(self->cval.imag);
- else if (strcmp(name, "conj") == 0) {
- cval.real = self->cval.real;
- cval.imag = -self->cval.imag;
- return (object *)newcomplexobject(cval);
- }
- return findmethod(complex_methods, (object *)self, name);
- }
-
- static number_methods complex_as_number = {
- (binaryfunc)complex_add, /*nb_add*/
- (binaryfunc)complex_sub, /*nb_subtract*/
- (binaryfunc)complex_mul, /*nb_multiply*/
- (binaryfunc)complex_div, /*nb_divide*/
- (binaryfunc)complex_remainder, /*nb_remainder*/
- (binaryfunc)complex_divmod, /*nb_divmod*/
- (ternaryfunc)complex_pow, /*nb_power*/
- (unaryfunc)complex_neg, /*nb_negative*/
- (unaryfunc)complex_pos, /*nb_positive*/
- (unaryfunc)complex_abs, /*nb_absolute*/
- (inquiry)complex_nonzero, /*nb_nonzero*/
- 0, /*nb_invert*/
- 0, /*nb_lshift*/
- 0, /*nb_rshift*/
- 0, /*nb_and*/
- 0, /*nb_xor*/
- 0, /*nb_or*/
- (coercion)complex_coerce, /*nb_coerce*/
- (unaryfunc)complex_int, /*nb_int*/
- (unaryfunc)complex_long, /*nb_long*/
- (unaryfunc)complex_float, /*nb_float*/
- 0, /*nb_oct*/
- 0, /*nb_hex*/
- };
-
- typeobject Complextype = {
- OB_HEAD_INIT(&Typetype)
- 0,
- "complex",
- sizeof(complexobject),
- 0,
- (destructor)complex_dealloc, /*tp_dealloc*/
- (printfunc)complex_print, /*tp_print*/
- (getattrfunc)complex_getattr, /*tp_getattr*/
- 0, /*tp_setattr*/
- (cmpfunc)complex_compare, /*tp_compare*/
- (reprfunc)complex_repr, /*tp_repr*/
- &complex_as_number, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- (hashfunc)complex_hash, /*tp_hash*/
- };
-
- #endif
-