Jean Crepeau <[EMAIL PROTECTED]> writes:
>
> There appears to be a bug in the 1.6.x releases of guile which wasn't
> there in the 1.4.1 (and probably other versions before).
Yep, but those versions are prone to overflow when re or im is above
sqrt(DBL_MAX).
> Simply doing
>
> (/ 0-1i)
>
> will result in #.##.#i
Thanks. Looks like nobody ever divided by -i before :). I think it's
meant to be like:
--- numbers.c.~1.135.2.20.~ 2005-02-21 09:50:34.000000000 +1100
+++ numbers.c 2005-04-29 14:19:10.535828592 +1000
@@ -3738,7 +3738,7 @@
} else if (SCM_COMPLEXP (x)) {
double r = SCM_COMPLEX_REAL (x);
double i = SCM_COMPLEX_IMAG (x);
- if (r <= i) {
+ if (fabs(r) <= fabs(i)) {
double t = r / i;
double d = i * (1.0 + t * t);
return scm_make_complex (t / d, -1.0 / d);
@@ -3782,7 +3782,7 @@
{
double r = SCM_COMPLEX_REAL (y);
double i = SCM_COMPLEX_IMAG (y);
- if (r <= i) {
+ if (fabs(r) <= fabs(i)) {
double t = r / i;
double d = i * (1.0 + t * t);
return scm_make_complex ((a * t) / d, -a / d);
@@ -3873,7 +3873,7 @@
} else if (SCM_COMPLEXP (y)) {
double ry = SCM_COMPLEX_REAL (y);
double iy = SCM_COMPLEX_IMAG (y);
- if (ry <= iy) {
+ if (fabs(ry) <= fabs(iy)) {
double t = ry / iy;
double d = iy * (1.0 + t * t);
return scm_make_complex ((rx * t + ix) / d, (ix * t - rx) / d);
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