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, 18 * USA. 19 */ 20 21 #ifndef __GSL_COMPLEX_H__ 22 #define __GSL_COMPLEX_H__ 23 24 #undef __BEGIN_DECLS 25 #undef __END_DECLS 26 #ifdef __cplusplus 27 #define __BEGIN_DECLS extern "C" { 28 #define __END_DECLS } 29 #else 30 #define __BEGIN_DECLS /* empty */ 31 #define __END_DECLS /* empty */ 32 #endif 33 34 __BEGIN_DECLS 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 /* 2N consecutive built-in types as N complex numbers */ 46 typedef double *gsl_complex_packed_array; 47 typedef float *gsl_complex_packed_array_float; 48 typedef long double *gsl_complex_packed_array_long_double; 49 50 typedef const double *gsl_const_complex_packed_array; 51 typedef const float *gsl_const_complex_packed_array_float; 52 typedef const long double *gsl_const_complex_packed_array_long_double; 53 54 /* Yes... this seems weird. Trust us. The point is just that 55 sometimes you want to make it obvious that something is 56 an output value. The fact that it lacks a 'const' may not 57 be enough of a clue for people in some contexts. 58 */ 59 typedef double *gsl_complex_packed_ptr; 60 typedef float *gsl_complex_packed_float_ptr; 61 typedef long double *gsl_complex_packed_long_double_ptr; 62 63 typedef const double *gsl_const_complex_packed_ptr; 64 typedef const float *gsl_const_complex_packed_float_ptr; 65 typedef const long double *gsl_const_complex_packed_long_double_ptr; 66 67 typedef struct { 68 long double dat[2]; 69 } gsl_complex_long_double; 70 71 typedef struct { 72 double dat[2]; 73 } gsl_complex; 74 75 typedef struct { 76 float dat[2]; 77 } gsl_complex_float; 78 79 #define GSL_REAL(z) ((z).dat[0]) 80 #define GSL_IMAG(z) ((z).dat[1]) 81 #define GSL_COMPLEX_P(zp) ((zp)->dat) 82 #define GSL_COMPLEX_P_REAL(zp) ((zp)->dat[0]) 83 #define GSL_COMPLEX_P_IMAG(zp) ((zp)->dat[1]) 84 #define GSL_COMPLEX_EQ(z1, z2) \ 85 (((z1).dat[0] == (z2).dat[0]) && ((z1).dat[1] == (z2).dat[1])) 86 87 #define GSL_SET_COMPLEX(zp, x, y) \ 88 do { \ 89 (zp)->dat[0] = (x); \ 90 (zp)->dat[1] = (y); \ 91 } while (0) 92 #define GSL_SET_REAL(zp, x) \ 93 do { \ 94 (zp)->dat[0] = (x); \ 95 } while (0) 96 #define GSL_SET_IMAG(zp, y) \ 97 do { \ 98 (zp)->dat[1] = (y); \ 99 } while (0) 100 101 #define GSL_SET_COMPLEX_PACKED(zp, n, x, y) \ 102 do { \ 103 *((zp) + 2 * (n)) = (x); \ 104 *((zp) + (2 * (n) + 1)) = (y); \ 105 } while (0) 106 107 __END_DECLS 108 109 #endif /* __GSL_COMPLEX_H__ */ 110