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