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/*
 * -- SuperLU routine (version 2.0) --
 * Lawrence Berkeley National Lab, Univ. of California Berkeley,
 * and Xerox Palo Alto Research Center.
 * September 10, 2007
 *
 */
#ifndef __SUPERLU_DCOMPLEX /* allow multiple inclusions */
#define __SUPERLU_DCOMPLEX

/* 
 * This header file is to be included in source files z*.c
 */
#ifndef DCOMPLEX_INCLUDE
#define DCOMPLEX_INCLUDE

namespace harlinn
{
    namespace numerics
    {
        namespace SuperLU
        {
            typedef struct { double r, i; } doublecomplex;


            /* Macro definitions */

            /* Complex Addition c = a + b */
            #define z_add(c, a, b) { (c)->r = (a)->r + (b)->r; \
			                (c)->i = (a)->i + (b)->i; }

            /* Complex Subtraction c = a - b */
            #define z_sub(c, a, b) { (c)->r = (a)->r - (b)->r; \
			                (c)->i = (a)->i - (b)->i; }

            /* Complex-Double Multiplication */
            #define zd_mult(c, a, b) { (c)->r = (a)->r * (b); \
                                        (c)->i = (a)->i * (b); }

            /* Complex-Complex Multiplication */
            #define zz_mult(c, a, b) { \
	            double cr, ci; \
    	            cr = (a)->r * (b)->r - (a)->i * (b)->i; \
    	            ci = (a)->i * (b)->r + (a)->r * (b)->i; \
    	            (c)->r = cr; \
    	            (c)->i = ci; \
                }

            #define zz_conj(a, b) { \
                    (a)->r = (b)->r; \
                    (a)->i = -((b)->i); \
                }

            /* Complex equality testing */
            #define z_eq(a, b)  ( (a)->r == (b)->r && (a)->i == (b)->i )



            /* Prototypes for functions in dcomplex.c */
            void z_div(doublecomplex *, doublecomplex *, doublecomplex *);
            double z_abs(doublecomplex *);     /* exact */
            double z_abs1(doublecomplex *);    /* approximate */
            void z_exp(doublecomplex *, doublecomplex *);
            void d_cnjg(doublecomplex *r, doublecomplex *z);
            double d_imag(doublecomplex *);

        };
    };
};


#endif

#endif  /* __SUPERLU_DCOMPLEX */