Mercurial > hg > octave-nkf
annotate liboctave/DET.h @ 9838:55219e65c7cd
fix typo
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Thu, 19 Nov 2009 12:23:52 +0100 |
| parents | 16f53d29049f |
| children | 9a308e96194e |
| rev | line source |
|---|---|
| 8335 | 1 /* |
| 2 | |
| 9245 | 3 Copyright (C) 2008, 2009 Jaroslav Hajek |
| 8335 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 3 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with Octave; see the file COPYING. If not, see | |
| 19 <http://www.gnu.org/licenses/>. | |
| 20 | |
| 21 */ | |
| 22 | |
| 23 #if !defined (octave_DET_h) | |
| 24 #define octave_DET_h 1 | |
| 25 | |
| 26 #include <cmath> | |
| 27 #include "oct-cmplx.h" | |
| 28 #include "lo-mappers.h" | |
| 29 | |
| 30 template <class T> | |
| 31 class | |
| 32 base_det | |
| 33 { | |
| 34 public: | |
| 35 | |
|
8336
9813c07ca946
make det take advantage of matrix type
Jaroslav Hajek <highegg@gmail.com>
parents:
8335
diff
changeset
|
36 base_det (T c = 1, int e = 0) |
| 8335 | 37 { |
| 38 c2 = xlog2 (c, e2); | |
| 39 e2 += e; | |
| 40 } | |
| 41 | |
| 42 base_det (T c, double e, double b) | |
| 43 { | |
| 44 e *= xlog2 (b); | |
| 45 e2 = e; | |
| 46 c *= xexp2 (e - e2); | |
| 47 int f; | |
| 48 c2 = xlog2 (c, f); | |
| 49 e2 += f; | |
| 50 } | |
| 51 | |
| 52 base_det (const base_det& a) : c2(a.c2), e2(a.e2) { } | |
| 53 | |
| 54 base_det& operator = (const base_det& a) | |
| 55 { | |
| 56 c2 = a.c2; | |
| 57 e2 = a.e2; | |
| 58 return *this; | |
| 59 } | |
| 60 | |
| 61 T coef (void) const { return c2; } | |
| 62 int exp (void) const { return e2; } | |
| 63 | |
| 64 T value () const { return c2 * static_cast<T> (std::ldexp (1.0, e2)); } | |
| 65 operator T () const { return value (); } | |
| 66 | |
|
8336
9813c07ca946
make det take advantage of matrix type
Jaroslav Hajek <highegg@gmail.com>
parents:
8335
diff
changeset
|
67 base_det square () const { return base_det (c2*c2, e2+e2); } |
|
9813c07ca946
make det take advantage of matrix type
Jaroslav Hajek <highegg@gmail.com>
parents:
8335
diff
changeset
|
68 |
| 8335 | 69 void operator *= (T t) |
| 70 { | |
| 71 int e; | |
| 72 c2 *= xlog2 (t, e); | |
| 73 e2 += e; | |
| 74 } | |
| 75 | |
| 76 private: | |
| 77 | |
| 78 T c2; | |
| 79 int e2; | |
| 80 }; | |
| 81 | |
| 82 // Provide the old types by typedefs. | |
| 83 typedef base_det<double> DET; | |
| 84 typedef base_det<float> FloatDET; | |
| 85 typedef base_det<Complex> ComplexDET; | |
| 86 typedef base_det<FloatComplex> FloatComplexDET; | |
| 87 | |
| 88 #endif |