1 | /*************************************************************************** |
---|
2 | * blitz/matgen.h Declarations for RowMajor and ColumnMajor matrices |
---|
3 | * |
---|
4 | * $Id: matgen.h,v 1.4 2003/12/11 03:44:22 julianc Exp $ |
---|
5 | * |
---|
6 | * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> |
---|
7 | * |
---|
8 | * This program is free software; you can redistribute it and/or |
---|
9 | * modify it under the terms of the GNU General Public License |
---|
10 | * as published by the Free Software Foundation; either version 2 |
---|
11 | * of the License, or (at your option) any later version. |
---|
12 | * |
---|
13 | * This program is distributed in the hope that it will be useful, |
---|
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
16 | * GNU General Public License for more details. |
---|
17 | * |
---|
18 | * Suggestions: blitz-dev@oonumerics.org |
---|
19 | * Bugs: blitz-bugs@oonumerics.org |
---|
20 | * |
---|
21 | * For more information, please see the Blitz++ Home Page: |
---|
22 | * http://oonumerics.org/blitz/ |
---|
23 | * |
---|
24 | ***************************************************************************/ |
---|
25 | |
---|
26 | #ifndef BZ_MATGEN_H |
---|
27 | #define BZ_MATGEN_H |
---|
28 | |
---|
29 | #ifndef BZ_MSTRUCT_H |
---|
30 | #error <blitz/matgen.h> must be included via <blitz/mstruct.h> |
---|
31 | #endif // BZ_MSTRUCT_H |
---|
32 | |
---|
33 | BZ_NAMESPACE(blitz) |
---|
34 | |
---|
35 | class GeneralMatrix : public AsymmetricMatrix { |
---|
36 | |
---|
37 | public: |
---|
38 | GeneralMatrix() |
---|
39 | { } |
---|
40 | |
---|
41 | GeneralMatrix(unsigned rows, unsigned cols) |
---|
42 | : AsymmetricMatrix(rows, cols) |
---|
43 | { |
---|
44 | } |
---|
45 | |
---|
46 | unsigned firstInRow(unsigned i) const |
---|
47 | { return 0; } |
---|
48 | |
---|
49 | unsigned lastInRow(unsigned i) const |
---|
50 | { return cols_ - 1; } |
---|
51 | |
---|
52 | unsigned firstInCol(unsigned j) const |
---|
53 | { return 0; } |
---|
54 | |
---|
55 | unsigned lastInCol(unsigned j) const |
---|
56 | { return rows_ - 1; } |
---|
57 | |
---|
58 | unsigned numElements() const |
---|
59 | { return rows_ * cols_; } |
---|
60 | }; |
---|
61 | |
---|
62 | class GeneralIterator { |
---|
63 | public: |
---|
64 | GeneralIterator(unsigned rows, unsigned cols) |
---|
65 | { |
---|
66 | rows_ = rows; |
---|
67 | cols_ = cols; |
---|
68 | i_ = 0; |
---|
69 | j_ = 0; |
---|
70 | offset_ = 0; |
---|
71 | good_ = true; |
---|
72 | } |
---|
73 | |
---|
74 | unsigned offset() const { return offset_; } |
---|
75 | operator bool() const { return good_; } |
---|
76 | unsigned row() const { return i_; } |
---|
77 | unsigned col() const { return j_; } |
---|
78 | |
---|
79 | protected: |
---|
80 | unsigned rows_, cols_; |
---|
81 | unsigned offset_; |
---|
82 | unsigned i_, j_; |
---|
83 | bool good_; |
---|
84 | }; |
---|
85 | |
---|
86 | class RowMajorIterator : public GeneralIterator { |
---|
87 | public: |
---|
88 | RowMajorIterator(unsigned rows, unsigned cols) |
---|
89 | : GeneralIterator(rows, cols) |
---|
90 | { } |
---|
91 | |
---|
92 | void operator++() |
---|
93 | { |
---|
94 | ++offset_; |
---|
95 | ++j_; |
---|
96 | if (j_ == cols_) |
---|
97 | { |
---|
98 | j_ = 0; |
---|
99 | ++i_; |
---|
100 | if (i_ == rows_) |
---|
101 | good_ = false; |
---|
102 | } |
---|
103 | } |
---|
104 | }; |
---|
105 | |
---|
106 | class RowMajor : public GeneralMatrix { |
---|
107 | |
---|
108 | public: |
---|
109 | typedef RowMajorIterator T_iterator; |
---|
110 | |
---|
111 | RowMajor() |
---|
112 | { } |
---|
113 | |
---|
114 | RowMajor(unsigned rows, unsigned cols) |
---|
115 | : GeneralMatrix(rows, cols) |
---|
116 | { } |
---|
117 | |
---|
118 | unsigned coordToOffset(unsigned i, unsigned j) const |
---|
119 | { |
---|
120 | return i*cols_+j; |
---|
121 | } |
---|
122 | |
---|
123 | template<typename T_numtype> |
---|
124 | T_numtype get(const T_numtype * restrict data, |
---|
125 | unsigned i, unsigned j) const |
---|
126 | { |
---|
127 | BZPRECONDITION(inRange(i,j)); |
---|
128 | return data[coordToOffset(i,j)]; |
---|
129 | } |
---|
130 | |
---|
131 | template<typename T_numtype> |
---|
132 | T_numtype& get(T_numtype * restrict data, unsigned i, unsigned j) |
---|
133 | { |
---|
134 | BZPRECONDITION(inRange(i,j)); |
---|
135 | return data[coordToOffset(i,j)]; |
---|
136 | } |
---|
137 | }; |
---|
138 | |
---|
139 | class ColumnMajorIterator : public GeneralIterator { |
---|
140 | public: |
---|
141 | ColumnMajorIterator(unsigned rows, unsigned cols) |
---|
142 | : GeneralIterator(rows, cols) |
---|
143 | { |
---|
144 | } |
---|
145 | |
---|
146 | void operator++() |
---|
147 | { |
---|
148 | ++offset_; |
---|
149 | ++i_; |
---|
150 | if (i_ == rows_) |
---|
151 | { |
---|
152 | i_ = 0; |
---|
153 | ++j_; |
---|
154 | if (j_ == cols_) |
---|
155 | good_ = false; |
---|
156 | } |
---|
157 | } |
---|
158 | }; |
---|
159 | |
---|
160 | class ColumnMajor : public GeneralMatrix { |
---|
161 | |
---|
162 | public: |
---|
163 | ColumnMajor() |
---|
164 | { } |
---|
165 | |
---|
166 | ColumnMajor(unsigned rows, unsigned cols) |
---|
167 | : GeneralMatrix(rows, cols) |
---|
168 | { } |
---|
169 | |
---|
170 | unsigned coordToOffset(unsigned i, unsigned j) const |
---|
171 | { |
---|
172 | return j*rows_ + i; |
---|
173 | } |
---|
174 | |
---|
175 | template<typename T_numtype> |
---|
176 | T_numtype get(const T_numtype * restrict data, |
---|
177 | unsigned i, unsigned j) const |
---|
178 | { |
---|
179 | BZPRECONDITION(inRange(i,j)); |
---|
180 | return data[coordToOffset(i,j)]; |
---|
181 | } |
---|
182 | |
---|
183 | template<typename T_numtype> |
---|
184 | T_numtype& get(T_numtype * restrict data, unsigned i, unsigned j) |
---|
185 | { |
---|
186 | BZPRECONDITION(inRange(i,j)); |
---|
187 | return data[coordToOffset(i,j)]; |
---|
188 | } |
---|
189 | }; |
---|
190 | |
---|
191 | BZ_NAMESPACE_END |
---|
192 | |
---|
193 | #endif // BZ_MATGEN_H |
---|
194 | |
---|