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/*! @file slu_scomplex.h
* \brief Header file for complex operations
* <pre>
* -- SuperLU routine (version 2.0) --
* Univ. of California Berkeley, Xerox Palo Alto Research Center,
* and Lawrence Berkeley National Lab.
* November 15, 1997
*
* Contains definitions for various complex operations.
* This header file is to be included in source files c*.c
* </pre>
*/
#ifndef __SUPERLU_SCOMPLEX /* allow multiple inclusions */
#define __SUPERLU_SCOMPLEX
#ifndef SCOMPLEX_INCLUDE
#define SCOMPLEX_INCLUDE
typedef struct { float r, i; } complex;
/* Macro definitions */
/*! \brief Complex Addition c = a + b */
#define c_add(c, a, b) { (c)->r = (a)->r + (b)->r; \
(c)->i = (a)->i + (b)->i; }
/*! \brief Complex Subtraction c = a - b */
#define c_sub(c, a, b) { (c)->r = (a)->r - (b)->r; \
(c)->i = (a)->i - (b)->i; }
/*! \brief Complex-Double Multiplication */
#define cs_mult(c, a, b) { (c)->r = (a)->r * (b); \
(c)->i = (a)->i * (b); }
/*! \brief Complex-Complex Multiplication */
#define cc_mult(c, a, b) { \
float 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 cc_conj(a, b) { \
(a)->r = (b)->r; \
(a)->i = -((b)->i); \
}
/*! \brief Complex equality testing */
#define c_eq(a, b) ( (a)->r == (b)->r && (a)->i == (b)->i )
#ifdef __cplusplus
extern "C" {
#endif
/* Prototypes for functions in scomplex.c */
void c_div(complex *, complex *, complex *);
double c_abs(complex *); /* exact */
double c_abs1(complex *); /* approximate */
void c_exp(complex *, complex *);
void r_cnjg(complex *, complex *);
double r_imag(complex *);
complex c_sgn(complex *);
complex c_sqrt(complex *);
#ifdef __cplusplus
}
#endif
#endif
#endif /* __SUPERLU_SCOMPLEX */
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