JCublasJava/src/main/java/jcuda/jcublas/JCublas.java
public static cuDoubleComplex cublasZdotc(int n, Pointer x, int incx, Pointer y, int incy)
    {
        cuDoubleComplex result = cublasZdotcNative(n, x, incx, y, incy);
        checkResultBLAS();
        return result;
    }
public static cuDoubleComplex cublasZdotc(int n, Pointer x, int incx, Pointer y, int incy)
    {
        cuDoubleComplex result = cublasZdotcNative(n, x, incx, y, incy);
        checkResultBLAS();
        return result;
    }
<pre>
cuDoubleComplex
cublasZdotc (int n, const cuDoubleComplex *x, int incx, const cuDoubleComplex *y, int incy)

computes the dot product of two double-precision complex vectors. It returns the
dot product of the double-precision complex vectors conjugate(x) and y if successful,
and double-precision complex zero otherwise. It computes the
sum for i = 0 to n - 1 of conjugate(x[lx + i * incx]) *  y[ly + i * incy],
where lx = 1 if incx >= 0, else lx = 1 + (1 - n) * incx;
ly is defined in a similar way using incy.

Input
-----
n      number of elements in input vectors
x      double-precision complex vector with n elements
incx   storage spacing between elements of x
y      double-precision complex vector with n elements
incy   storage spacing between elements of y

Output
------
returns double-complex dot product (zero if n <= 0)

Reference: http://www.netlib.org/blas/zdotc.f

Error status for this function can be retrieved via cublasGetError().

Error Status
------------
CUBLAS_STATUS_NOT_INITIALIZED  if CUBLAS library has nor been initialized
CUBLAS_STATUS_ARCH_MISMATCH    if invoked on device without DP support
CUBLAS_STATUS_EXECUTION_FAILED if function failed to execute on GPU
</pre>