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assume polar tail for inexact complex following / (issue #333)

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Alex Shinn 2020-08-20 10:30:23 +09:00
parent 287753f2e3
commit 0f6e0f56e0
1 changed files with 15 additions and 0 deletions
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15
sexp.c
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@ -2799,6 +2799,9 @@ sexp sexp_read_number (sexp ctx, sexp in, int base, int exactp) {
int c, digit, negativep = 0;
#if SEXP_USE_PLACEHOLDER_DIGITS
double whole = 0.0, scale = 0.1;
#endif
#if SEXP_USE_COMPLEX && SEXP_USE_MATH
double rho, theta;
#endif
sexp_gc_var2(res, den);
@ -2902,6 +2905,18 @@ sexp sexp_read_number (sexp ctx, sexp in, int base, int exactp) {
res = sexp_make_ratio(ctx, res, sexp_complex_imag(den));
res = sexp_ratio_normalize(ctx, res, in);
sexp_complex_imag(den) = res;
#if SEXP_USE_MATH
} else if (sexp_flonump(sexp_complex_real(den))) { /* assume polar */
rho = sqrt(sexp_flonum_value(sexp_complex_real(den)) *
sexp_flonum_value(sexp_complex_real(den)) +
sexp_to_double(ctx, sexp_complex_imag(den)) +
sexp_to_double(ctx, sexp_complex_imag(den)));
theta = atan(sexp_to_double(ctx, sexp_complex_imag(den)) /
sexp_flonum_value(sexp_complex_real(den)));
rho = sexp_to_double(ctx, sexp_div(ctx, res, sexp_make_fixnum((sexp_sint_t)round(rho))));
sexp_complex_real(den) = sexp_make_flonum(ctx, rho * cos(theta));
sexp_complex_imag(den) = sexp_make_flonum(ctx, rho * sin(theta));
#endif
} else {
res = sexp_make_ratio(ctx, res, sexp_complex_real(den));
res = sexp_ratio_normalize(ctx, res, in);