Projection & Decomposing (GNU MPC 1.4.1)

### 5.6 Projection and Decomposing Functions ¶

Function: `int` mpc_real `(mpfr_t rop, const mpc_t op, mpfr_rnd_t rnd)` ¶

  Set rop to the value of the real part of op rounded in the direction rnd.

Function: `int` mpc_imag `(mpfr_t rop, const mpc_t op, mpfr_rnd_t rnd)` ¶

  Set rop to the value of the imaginary part of op rounded in the direction rnd.

Macro: `mpfr_t` mpc_realref `(mpc_t op)` ¶
Macro: `mpfr_t` mpc_imagref `(mpc_t op)` ¶

  Return a reference to the real part and imaginary part of op, respectively. The `mpfr` functions can be used on the result of these macros (note that the `mpfr_t` type is itself a pointer).

Function: `int` mpc_arg `(mpfr_t rop, const mpc_t op, mpfr_rnd_t rnd)` ¶

  Set rop to the argument of op, with a branch cut along the negative real axis.

Function: `int` mpc_proj `(mpc_t rop, const mpc_t op, mpc_rnd_t rnd)` ¶

  Compute a projection of op onto the Riemann sphere. Set rop to op rounded in the direction rnd, except when at least one part of op is infinite (even if the other part is a NaN) in which case the real part of rop is set to plus infinity and its imaginary part to a signed zero with the same sign as the imaginary part of op.