1 /* complex/gsl_complex.h 2 * 3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 3 of the License, or (at 8 * your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GSL_COMPLEX_H__ 21 #define __GSL_COMPLEX_H__ 22 23 #undef __BEGIN_DECLS 24 #undef __END_DECLS 25 #ifdef __cplusplus 26 # define __BEGIN_DECLS extern "C" { 27 # define __END_DECLS } 28 #else 29 # define __BEGIN_DECLS /* empty */ 30 # define __END_DECLS /* empty */ 31 #endif 32 33 __BEGIN_DECLS 34 35 36 /* two consecutive built-in types as a complex number */ 37 typedef double * gsl_complex_packed ; 38 typedef float * gsl_complex_packed_float ; 39 typedef long double * gsl_complex_packed_long_double ; 40 41 typedef const double * gsl_const_complex_packed ; 42 typedef const float * gsl_const_complex_packed_float ; 43 typedef const long double * gsl_const_complex_packed_long_double ; 44 45 46 /* 2N consecutive built-in types as N complex numbers */ 47 typedef double * gsl_complex_packed_array ; 48 typedef float * gsl_complex_packed_array_float ; 49 typedef long double * gsl_complex_packed_array_long_double ; 50 51 typedef const double * gsl_const_complex_packed_array ; 52 typedef const float * gsl_const_complex_packed_array_float ; 53 typedef const long double * gsl_const_complex_packed_array_long_double ; 54 55 56 /* Yes... this seems weird. Trust us. The point is just that 57 sometimes you want to make it obvious that something is 58 an output value. The fact that it lacks a 'const' may not 59 be enough of a clue for people in some contexts. 60 */ 61 typedef double * gsl_complex_packed_ptr ; 62 typedef float * gsl_complex_packed_float_ptr ; 63 typedef long double * gsl_complex_packed_long_double_ptr ; 64 65 typedef const double * gsl_const_complex_packed_ptr ; 66 typedef const float * gsl_const_complex_packed_float_ptr ; 67 typedef const long double * gsl_const_complex_packed_long_double_ptr ; 68 69 70 typedef struct 71 { 72 long double dat[2]; 73 } 74 gsl_complex_long_double; 75 76 typedef struct 77 { 78 double dat[2]; 79 } 80 gsl_complex; 81 82 typedef struct 83 { 84 float dat[2]; 85 } 86 gsl_complex_float; 87 88 #define GSL_REAL(z) ((z).dat[0]) 89 #define GSL_IMAG(z) ((z).dat[1]) 90 #define GSL_COMPLEX_P(zp) ((zp)->dat) 91 #define GSL_COMPLEX_P_REAL(zp) ((zp)->dat[0]) 92 #define GSL_COMPLEX_P_IMAG(zp) ((zp)->dat[1]) 93 #define GSL_COMPLEX_EQ(z1,z2) (((z1).dat[0] == (z2).dat[0]) && ((z1).dat[1] == (z2).dat[1])) 94 95 #define GSL_SET_COMPLEX(zp,x,y) do {(zp)->dat[0]=(x); (zp)->dat[1]=(y);} while(0) 96 #define GSL_SET_REAL(zp,x) do {(zp)->dat[0]=(x);} while(0) 97 #define GSL_SET_IMAG(zp,y) do {(zp)->dat[1]=(y);} while(0) 98 99 #define GSL_SET_COMPLEX_PACKED(zp,n,x,y) do {*((zp)+2*(n))=(x); *((zp)+(2*(n)+1))=(y);} while(0) 100 101 __END_DECLS 102 103 #endif /* __GSL_COMPLEX_H__ */ 104