[RFC]: Add C implementation for `@stdlib/math/base/special/atan2`

[Pushpendra766]

Description

This RFC proposes adding C implementation for @stdlib/math/base/special/atan2.

Related Issues

Related issues #649

Questions

No.

Other

The atan2 package is dependent on :-
isinfinite , copysign, signbit, isnan, atan, pinf and pi, and all of these packages are already implemented in C.

Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.

[Pushpendra766]

I want to work on this issue.

[Planeshifter]

@Pushpendra766 Thanks! Just assigned you.

[gawandeabhishek]

Hey @Planeshifter , I believe the C implementation of atan2 can be added with this code.

double atan2(const double y, const double x) {
if (x > 0) {
return atan(y, x);
} else if (x < 0 && y >= 0) {
return atan(y, x) + M_PI;
} else if (x < 0 && y < 0) {
return atan(y, x) - M_PI;
} else if (x = 0 && y > 0) {
return M_PI / 2;
} else if (x = 0 && y < 0) {
return -1 * (M_PI / 2);
} else {
return 0.0/0.0;
}
}

[gawandeabhishek]

am I correct?

[kgryte]

@gawandeabhishek No, that is not the implementation that we want. And as @Pushpendra766 has already been assigned this issue, I suggest volunteering to work on a different issue.

[gawandeabhishek]

Ok