Mercurial > octave
annotate liboctave/array/Array.h @ 29654:d13d090cb03a stable
use std::size_t and std::ptrdiff_t in C++ code (bug #60471)
Files affected: make_int.cc, file-editor-tab.cc, octave-qscintilla.cc,
Cell.cc, Cell.h, call-stack.cc, call-stack.h, cellfun.cc, data.cc,
debug.cc, dlmread.cc, error.cc, event-queue.h, fcn-info.cc,
fcn-info.h, file-io.cc, ft-text-renderer.cc, gl2ps-print.cc,
graphics.cc, graphics.in.h, help.cc, hex2num.cc, input.cc,
latex-text-renderer.cc, load-path.cc, load-save.cc, load-save.h,
ls-hdf5.cc, ls-mat-ascii.cc, ls-mat5.cc, ls-oct-text.cc, mex.cc,
mexproto.h, mxarray.h, oct-map.cc, oct-stream.cc, oct-stream.h,
pager.cc, pager.h, pr-output.cc, regexp.cc, settings.h,
stack-frame.cc, stack-frame.h, strfns.cc, syminfo.cc, symrec.h,
symscope.cc, symscope.h, symtab.cc, sysdep.cc, toplev.cc, utils.cc,
utils.h, variables.cc, __fltk_uigetfile__.cc, __init_fltk__.cc,
audioread.cc, gzip.cc, cdef-class.cc, cdef-manager.cc, cdef-method.cc,
cdef-object.cc, cdef-object.h, ov-base-diag.cc, ov-base-diag.h,
ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-scalar.h,
ov-base-sparse.h, ov-base.cc, ov-base.h, ov-cell.cc, ov-cell.h,
ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc,
ov-fcn-handle.cc, ov-java.cc, ov-lazy-idx.h, ov-perm.cc, ov-perm.h,
ov-range.h, ov-str-mat.cc, ov-struct.cc, ov-struct.h, ov-usr-fcn.cc,
ov-usr-fcn.h, ov.cc, ov.h, ovl.cc, octave.cc, bp-table.cc, jit-ir.cc,
jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.h, lex.h, lex.ll,
oct-lvalue.cc, oct-parse.yy, parse.h, profiler.h, pt-eval.cc,
pt-eval.h, pt-jit.cc, pt-jit.h, pt-pr-code.cc, pt-tm-const.cc,
pt-tm-const.h, Array.h, CMatrix.cc, DiagArray2.h, PermMatrix.h,
Sparse.h, dMatrix.cc, fCMatrix.cc, fMatrix.cc, bsxfun-defs.cc,
oct-fftw.cc, oct-fftw.h, randpoisson.cc, sparse-chol.cc,
mx-inlines.cc, file-ops.cc, lo-sysdep.cc, oct-env.cc, oct-time.cc,
action-container.cc, action-container.h, base-list.h, caseless-str.h,
cmd-edit.cc, cmd-hist.cc, data-conv.cc, data-conv.h, f77-fcn.h,
file-info.cc, file-info.h, kpse.cc, kpse.h, lo-cutils.h, lo-hash.h,
lo-regexp.cc, oct-base64.cc, oct-base64.h, oct-binmap.h, oct-glob.cc,
oct-shlib.cc, oct-shlib.h, oct-sort.cc, oct-sparse.h, oct-string.cc,
quit.cc, unwind-prot.h, url-transfer.cc, main.in.cc, mkoctfile.in.cc,
and shared-fcns.h.
(grafted from aef11bb4e6d1f303ad9de5688fcb7244ef48867e)
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 28 Apr 2021 22:57:42 -0400 |
parents | 0a5b15007766 |
children | 32f4357ac8d9 |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1993-2021 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
228 | 25 |
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26 #if ! defined (octave_Array_h) |
382 | 27 #define octave_Array_h 1 |
28 | |
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29 #include "octave-config.h" |
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30 |
1366 | 31 #include <cassert> |
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3613 | 33 |
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34 #include <algorithm> |
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35 #include <iosfwd> |
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36 #include <string> |
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39 #include "idx-vector.h" |
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40 #include "lo-error.h" |
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43 #include "oct-refcount.h" |
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45 #include "quit.h" |
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47 //! N Dimensional Array with copy-on-write semantics. |
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48 //! |
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49 //! The Array class is at the root of Octave. It provides a container |
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50 //! with an arbitrary number of dimensions. The operator () provides |
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51 //! access to individual elements via subscript and linear indexing. |
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52 //! Indexing starts at 0. Arrays are column-major order as in Fortran. |
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53 //! |
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54 //! @code{.cc} |
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55 //! // 3 D Array with 10 rows, 20 columns, and 5 pages, filled with 7.0 |
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56 //! Array<double> A Array<double (dim_vector (10, 20, 5), 7.0); |
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57 //! |
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58 //! // set value for row 0, column 10, and page 3 |
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59 //! A(0, 10, 3) = 2.5; |
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60 //! |
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61 //! // get value for row 1, column 2, and page 0 |
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62 //! double v = A(1, 2, 0); |
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63 //! |
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64 //! // get value for 25th element (row 4, column 3, page 1) |
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65 //! double v = A(24); |
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66 //! @endcode |
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67 //! |
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68 //! ## Notes on STL compatibility |
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69 //! |
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70 //! ### size() and length() |
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71 //! |
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72 //! To access the total number of elements in an Array, use numel() |
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73 //! which is short for number of elements and is equivalent to the |
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74 //! Octave function with same name. |
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75 //! |
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76 //! @code{.cc} |
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77 //! Array<int> A (dim_vector (10, 20, 4), 1); |
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78 //! |
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79 //! octave_idx_type n = A.numel (); // returns 800 (10x20x4) |
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80 //! |
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81 //! octave_idx_type nr = A.size (0); // returns 10 (number of rows/dimension 0) |
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82 //! octave_idx_type nc = A.size (1); // returns 20 (number of columns) |
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83 //! octave_idx_type nc = A.size (2); // returns 4 (size of dimension 3) |
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84 //! octave_idx_type l6 = A.size (6); // returns 1 (implicit singleton dimension) |
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85 //! |
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86 //! // Alternatively, get a dim_vector which represents the dimensions. |
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87 //! dim_vector dims = A.dims (); |
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88 //! @endcode |
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89 //! |
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90 //! The methods size() and length() as they exist in the STL cause |
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91 //! confusion in the context of a N dimensional array. |
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92 //! |
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93 //! The size() of an array is the length of all dimensions. In Octave, |
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94 //! the size() function returns a row vector with the length of each |
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95 //! dimension, or the size of a specific dimension. Only the latter is |
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96 //! present in liboctave. |
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97 //! |
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98 //! Since there is more than 1 dimension, length() would not make sense |
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99 //! without expliciting which dimension. If the function existed, which |
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100 //! length should it return? Octave length() function returns the length |
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101 //! of the longest dimension which is an odd definition, only useful for |
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102 //! vectors and square matrices. The alternatives numel(), rows(), |
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103 //! columns(), and size(d) are more explicit and recommended. |
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104 //! |
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105 //! ### size_type |
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106 //! |
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107 //! Array::size_type is 'octave_idx_type' which is a typedef for 'int' |
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108 //! or 'long int', depending whether Octave was configured for 64-bit |
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109 //! indexing. |
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110 //! |
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111 //! This is a signed integer which may cause problems when mixed with |
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112 //! STL containers. The reason is that Octave interacts with Fortran |
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113 //! routines, providing an interface many Fortran numeric libraries. |
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114 //! |
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115 //! ## Subclasses |
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116 //! |
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117 //! The following subclasses specializations, will be of most use: |
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118 //! - Matrix: Array<double> with only 2 dimensions |
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119 //! - ComplexMatrix: Array<std::complex<double>> with only 2 dimensions |
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120 //! - boolNDArray: N dimensional Array<bool> |
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121 //! - ColumnVector: Array<double> with 1 column |
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122 //! - string_vector: Array<std::string> with 1 column |
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123 //! - Cell: Array<octave_value>, equivalent to an Octave cell. |
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124 |
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125 template <typename T> |
3585 | 126 class |
127 Array | |
228 | 128 { |
3504 | 129 protected: |
1619 | 130 |
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131 //! The real representation of all arrays. |
1735 | 132 class ArrayRep |
133 { | |
134 public: | |
135 | |
136 T *data; | |
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138 octave::refcount<octave_idx_type> count; |
1735 | 139 |
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140 ArrayRep (T *d, octave_idx_type l) |
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141 : data (new T [l]), len (l), count (1) |
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142 { |
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143 std::copy_n (d, l, data); |
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144 } |
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145 |
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146 template <typename U> |
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147 ArrayRep (U *d, octave_idx_type l) |
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148 : data (new T [l]), len (l), count (1) |
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149 { |
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150 std::copy_n (d, l, data); |
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151 } |
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153 // Use new instead of setting data to 0 so that fortran_vec and |
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154 // data always return valid addresses, even for zero-size arrays. |
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155 |
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156 ArrayRep (void) : data (new T [0]), len (0), count (1) { } |
1735 | 157 |
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158 explicit ArrayRep (octave_idx_type n) |
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159 : data (new T [n]), len (n), count (1) { } |
1735 | 160 |
5275 | 161 explicit ArrayRep (octave_idx_type n, const T& val) |
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162 : data (new T [n]), len (n), count (1) |
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163 { |
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164 std::fill_n (data, n, val); |
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165 } |
4513 | 166 |
1735 | 167 ArrayRep (const ArrayRep& a) |
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168 : data (new T [a.len]), len (a.len), count (1) |
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169 { |
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170 std::copy_n (a.data, a.len, data); |
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171 } |
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172 |
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173 ~ArrayRep (void) { delete [] data; } |
1735 | 174 |
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175 octave_idx_type numel (void) const { return len; } |
1735 | 176 |
4517 | 177 private: |
178 | |
179 // No assignment! | |
180 | |
181 ArrayRep& operator = (const ArrayRep& a); | |
1735 | 182 }; |
183 | |
4513 | 184 //-------------------------------------------------------------------- |
185 | |
6884 | 186 public: |
187 | |
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188 void make_unique (void) |
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189 { |
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190 if (rep->count > 1) |
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191 { |
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192 ArrayRep *r = new ArrayRep (slice_data, slice_len); |
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193 |
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194 if (--rep->count == 0) |
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195 delete rep; |
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196 |
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197 rep = r; |
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198 slice_data = rep->data; |
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199 } |
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200 } |
238 | 201 |
5900 | 202 typedef T element_type; |
203 | |
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204 typedef T value_type; |
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205 |
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206 //! Used for operator(), and returned by numel() and size() |
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207 //! (beware: signed integer) |
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208 typedef octave_idx_type size_type; |
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209 |
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210 typedef typename ref_param<T>::type crefT; |
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211 |
8725 | 212 typedef bool (*compare_fcn_type) (typename ref_param<T>::type, |
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213 typename ref_param<T>::type); |
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215 protected: |
4902 | 216 |
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217 dim_vector dimensions; |
4518 | 218 |
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219 typename Array<T>::ArrayRep *rep; |
4513 | 220 |
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221 // Rationale: |
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222 // slice_data is a pointer to rep->data, denoting together with slice_len the |
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223 // actual portion of the data referenced by this Array<T> object. This |
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224 // allows to make shallow copies not only of a whole array, but also of |
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225 // contiguous subranges. Every time rep is directly manipulated, slice_data |
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226 // and slice_len need to be properly updated. |
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227 |
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228 T *slice_data; |
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229 octave_idx_type slice_len; |
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230 |
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231 //! slice constructor |
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232 Array (const Array<T>& a, const dim_vector& dv, |
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233 octave_idx_type l, octave_idx_type u) |
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234 : dimensions (dv), rep(a.rep), slice_data (a.slice_data+l), slice_len (u-l) |
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235 { |
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236 rep->count++; |
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237 dimensions.chop_trailing_singletons (); |
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238 } |
4513 | 239 |
240 private: | |
241 | |
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242 static typename Array<T>::ArrayRep *nil_rep (void); |
238 | 243 |
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244 protected: |
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245 |
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246 //! For jit support |
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247 Array (T *sdata, octave_idx_type slen, octave_idx_type *adims, void *arep) |
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248 : dimensions (adims), |
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249 rep (reinterpret_cast<typename Array<T>::ArrayRep *> (arep)), |
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250 slice_data (sdata), slice_len (slen) { } |
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251 |
228 | 252 public: |
238 | 253 |
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254 //! Empty ctor (0 by 0). |
1550 | 255 Array (void) |
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256 : dimensions (), rep (nil_rep ()), slice_data (rep->data), |
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257 slice_len (rep->len) |
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258 { |
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259 rep->count++; |
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260 } |
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262 //! nD uninitialized ctor. |
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263 explicit Array (const dim_vector& dv) |
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264 : dimensions (dv), |
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266 slice_data (rep->data), slice_len (rep->len) |
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267 { |
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268 dimensions.chop_trailing_singletons (); |
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269 } |
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270 |
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271 //! nD initialized ctor. |
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272 explicit Array (const dim_vector& dv, const T& val) |
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273 : dimensions (dv), |
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274 rep (new typename Array<T>::ArrayRep (dv.safe_numel ())), |
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275 slice_data (rep->data), slice_len (rep->len) |
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276 { |
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277 fill (val); |
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278 dimensions.chop_trailing_singletons (); |
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279 } |
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281 //! Reshape constructor. |
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282 Array (const Array<T>& a, const dim_vector& dv); |
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283 |
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284 //! Constructor from standard library sequence containers. |
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285 template<template <typename...> class Container> |
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286 Array (const Container<T>& a, const dim_vector& dv); |
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287 |
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288 //! Type conversion case. |
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289 template <typename U> |
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291 : dimensions (a.dims ()), |
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292 rep (new typename Array<T>::ArrayRep (a.data (), a.numel ())), |
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293 slice_data (rep->data), slice_len (rep->len) |
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294 { } |
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296 //! No type conversion case. |
4513 | 297 Array (const Array<T>& a) |
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298 : dimensions (a.dimensions), rep (a.rep), slice_data (a.slice_data), |
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299 slice_len (a.slice_len) |
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300 { |
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301 rep->count++; |
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302 } |
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304 Array (Array<T>&& a) |
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305 : dimensions (std::move (a.dimensions)), rep (a.rep), |
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306 slice_data (a.slice_data), slice_len (a.slice_len) |
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307 { |
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308 a.rep = nullptr; |
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309 a.slice_data = nullptr; |
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310 a.slice_len = 0; |
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311 } |
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312 |
4513 | 313 public: |
314 | |
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315 virtual ~Array (void) |
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316 { |
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317 // Because we define a move constructor and a move assignment |
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318 // operator, rep may be a nullptr here. We should only need to |
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319 // protect the move assignment operator in a similar way. |
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320 |
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321 if (rep && --rep->count == 0) |
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322 delete rep; |
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323 } |
228 | 324 |
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325 Array<T>& operator = (const Array<T>& a) |
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326 { |
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327 if (this != &a) |
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328 { |
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329 if (--rep->count == 0) |
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330 delete rep; |
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331 |
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332 rep = a.rep; |
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333 rep->count++; |
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334 |
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335 dimensions = a.dimensions; |
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336 slice_data = a.slice_data; |
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337 slice_len = a.slice_len; |
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338 } |
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339 |
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340 return *this; |
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341 } |
4513 | 342 |
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343 Array<T>& operator = (Array<T>&& a) |
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344 { |
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345 if (this != &a) |
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346 { |
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347 dimensions = std::move (a.dimensions); |
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348 |
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349 // Because we define a move constructor and a move assignment |
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350 // operator, rep may be a nullptr here. We should only need to |
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351 // protect the destructor in a similar way. |
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352 |
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353 if (rep && --rep->count == 0) |
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354 delete rep; |
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355 |
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356 rep = a.rep; |
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357 slice_data = a.slice_data; |
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358 slice_len = a.slice_len; |
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359 |
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360 a.rep = nullptr; |
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361 a.slice_data = nullptr; |
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362 a.slice_len = 0; |
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363 } |
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364 |
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365 return *this; |
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366 } |
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367 |
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368 void fill (const T& val); |
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369 |
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370 void clear (void); |
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371 void clear (const dim_vector& dv); |
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372 |
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373 void clear (octave_idx_type r, octave_idx_type c) |
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374 { clear (dim_vector (r, c)); } |
238 | 375 |
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376 //! Number of elements in the array. |
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377 octave_idx_type numel (void) const { return slice_len; } |
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378 //@} |
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380 //! Return the array as a column vector. |
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381 Array<T> as_column (void) const |
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382 { |
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383 Array<T> retval (*this); |
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384 if (dimensions.ndims () != 2 || dimensions(1) != 1) |
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385 retval.dimensions = dim_vector (numel (), 1); |
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386 |
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387 return retval; |
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388 } |
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389 |
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390 //! Return the array as a row vector. |
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391 Array<T> as_row (void) const |
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392 { |
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393 Array<T> retval (*this); |
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394 if (dimensions.ndims () != 2 || dimensions(0) != 1) |
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395 retval.dimensions = dim_vector (1, numel ()); |
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396 |
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397 return retval; |
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398 } |
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399 |
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400 //! Return the array as a matrix. |
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401 Array<T> as_matrix (void) const |
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402 { |
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403 Array<T> retval (*this); |
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404 if (dimensions.ndims () != 2) |
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405 retval.dimensions = dimensions.redim (2); |
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406 |
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407 return retval; |
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408 } |
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409 |
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410 //! @name First dimension |
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411 //! |
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412 //! Get the first dimension of the array (number of rows) |
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413 //@{ |
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414 octave_idx_type dim1 (void) const { return dimensions(0); } |
5275 | 415 octave_idx_type rows (void) const { return dim1 (); } |
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416 //@} |
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417 |
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418 //! @name Second dimension |
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419 //! |
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420 //! Get the second dimension of the array (number of columns) |
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421 //@{ |
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422 octave_idx_type dim2 (void) const { return dimensions(1); } |
5275 | 423 octave_idx_type cols (void) const { return dim2 (); } |
424 octave_idx_type columns (void) const { return dim2 (); } | |
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425 //@} |
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426 |
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427 //! @name Third dimension |
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428 //! |
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429 //! Get the third dimension of the array (number of pages) |
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430 //@{ |
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431 octave_idx_type dim3 (void) const { return dimensions(2); } |
5275 | 432 octave_idx_type pages (void) const { return dim3 (); } |
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433 //@} |
4513 | 434 |
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435 //! Size of the specified dimension. |
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436 //! |
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437 //! Dimensions beyond the Array number of dimensions return 1 as |
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438 //! those are implicit singleton dimensions. |
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439 //! |
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440 //! Equivalent to Octave's 'size (A, DIM)' |
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441 |
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442 size_type size (const size_type d) const |
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443 { |
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444 // Should we throw for negative values? |
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445 // Should >= ndims () be handled by dim_vector operator() instead ? |
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446 return d >= ndims () ? 1 : dimensions(d); |
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447 } |
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448 |
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449 std::size_t byte_size (void) const |
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450 { return static_cast<std::size_t> (numel ()) * sizeof (T); } |
4902 | 451 |
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452 //! Return a const-reference so that dims ()(i) works efficiently. |
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453 const dim_vector& dims (void) const { return dimensions; } |
4513 | 454 |
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455 //! Chop off leading singleton dimensions |
4532 | 456 Array<T> squeeze (void) const; |
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457 |
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458 octave_idx_type compute_index (octave_idx_type i, octave_idx_type j) const; |
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459 octave_idx_type compute_index (octave_idx_type i, octave_idx_type j, |
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460 octave_idx_type k) const; |
5275 | 461 octave_idx_type compute_index (const Array<octave_idx_type>& ra_idx) const; |
4517 | 462 |
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463 octave_idx_type compute_index_unchecked (const Array<octave_idx_type>& ra_idx) |
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464 const |
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465 { return dimensions.compute_index (ra_idx.data (), ra_idx.numel ()); } |
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466 |
2108 | 467 // No checking, even for multiple references, ever. |
468 | |
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469 T& xelem (octave_idx_type n) { return slice_data[n]; } |
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470 crefT xelem (octave_idx_type n) const { return slice_data[n]; } |
2108 | 471 |
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472 T& xelem (octave_idx_type i, octave_idx_type j) |
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473 { return xelem (dim1 ()*j+i); } |
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474 crefT xelem (octave_idx_type i, octave_idx_type j) const |
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475 { return xelem (dim1 ()*j+i); } |
4513 | 476 |
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477 T& xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) |
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478 { return xelem (i, dim2 ()*k+j); } |
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479 crefT xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const |
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480 { return xelem (i, dim2 ()*k+j); } |
4513 | 481 |
6867 | 482 T& xelem (const Array<octave_idx_type>& ra_idx) |
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483 { return xelem (compute_index_unchecked (ra_idx)); } |
4513 | 484 |
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485 crefT xelem (const Array<octave_idx_type>& ra_idx) const |
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486 { return xelem (compute_index_unchecked (ra_idx)); } |
4513 | 487 |
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488 // FIXME: would be nice to fix this so that we don't unnecessarily force |
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489 // a copy, but that is not so easy, and I see no clean way to do it. |
2006 | 490 |
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491 T& checkelem (octave_idx_type n); |
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492 |
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493 T& checkelem (octave_idx_type i, octave_idx_type j); |
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494 |
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495 T& checkelem (octave_idx_type i, octave_idx_type j, octave_idx_type k); |
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496 |
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497 T& checkelem (const Array<octave_idx_type>& ra_idx); |
4513 | 498 |
5275 | 499 T& elem (octave_idx_type n) |
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500 { |
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501 make_unique (); |
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502 return xelem (n); |
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503 } |
2306 | 504 |
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505 T& elem (octave_idx_type i, octave_idx_type j) { return elem (dim1 ()*j+i); } |
4513 | 506 |
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507 T& elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) |
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508 { return elem (i, dim2 ()*k+j); } |
4513 | 509 |
6867 | 510 T& elem (const Array<octave_idx_type>& ra_idx) |
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511 { return Array<T>::elem (compute_index_unchecked (ra_idx)); } |
4513 | 512 |
5275 | 513 T& operator () (octave_idx_type n) { return elem (n); } |
514 T& operator () (octave_idx_type i, octave_idx_type j) { return elem (i, j); } | |
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515 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) |
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516 { return elem (i, j, k); } |
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517 T& operator () (const Array<octave_idx_type>& ra_idx) |
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518 { return elem (ra_idx); } |
2006 | 519 |
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520 crefT checkelem (octave_idx_type n) const; |
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521 |
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522 crefT checkelem (octave_idx_type i, octave_idx_type j) const; |
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523 |
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524 crefT checkelem (octave_idx_type i, octave_idx_type j, |
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525 octave_idx_type k) const; |
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526 |
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527 crefT checkelem (const Array<octave_idx_type>& ra_idx) const; |
4513 | 528 |
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529 crefT elem (octave_idx_type n) const { return xelem (n); } |
2306 | 530 |
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531 crefT elem (octave_idx_type i, octave_idx_type j) const |
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532 { return xelem (i, j); } |
4513 | 533 |
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534 crefT elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const |
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535 { return xelem (i, j, k); } |
4513 | 536 |
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537 crefT elem (const Array<octave_idx_type>& ra_idx) const |
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538 { return Array<T>::xelem (compute_index_unchecked (ra_idx)); } |
4513 | 539 |
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540 crefT operator () (octave_idx_type n) const { return elem (n); } |
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541 crefT operator () (octave_idx_type i, octave_idx_type j) const |
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542 { return elem (i, j); } |
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543 crefT operator () (octave_idx_type i, octave_idx_type j, |
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544 octave_idx_type k) const |
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545 { return elem (i, j, k); } |
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546 crefT operator () (const Array<octave_idx_type>& ra_idx) const |
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547 { return elem (ra_idx); } |
2006 | 548 |
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549 // Fast extractors. All of these produce shallow copies. |
9731 | 550 |
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551 //! Extract column: A(:,k+1). |
9731 | 552 Array<T> column (octave_idx_type k) const; |
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553 //! Extract page: A(:,:,k+1). |
9731 | 554 Array<T> page (octave_idx_type k) const; |
555 | |
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556 //! Extract a slice from this array as a column vector: A(:)(lo+1:up). |
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557 //! Must be 0 <= lo && up <= numel. May be up < lo. |
9731 | 558 Array<T> linear_slice (octave_idx_type lo, octave_idx_type up) const; |
559 | |
10352 | 560 Array<T> reshape (octave_idx_type nr, octave_idx_type nc) const |
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561 { return Array<T> (*this, dim_vector (nr, nc)); } |
10352 | 562 |
9731 | 563 Array<T> reshape (const dim_vector& new_dims) const |
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564 { return Array<T> (*this, new_dims); } |
4567 | 565 |
5275 | 566 Array<T> permute (const Array<octave_idx_type>& vec, bool inv = false) const; |
567 Array<T> ipermute (const Array<octave_idx_type>& vec) const | |
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568 { return permute (vec, true); } |
4593 | 569 |
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570 bool issquare (void) const { return (dim1 () == dim2 ()); } |
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571 |
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572 bool isempty (void) const { return numel () == 0; } |
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573 |
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574 bool isvector (void) const { return dimensions.isvector (); } |
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575 |
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576 bool is_nd_vector (void) const { return dimensions.is_nd_vector (); } |
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577 |
4513 | 578 Array<T> transpose (void) const; |
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579 Array<T> hermitian (T (*fcn) (const T&) = nullptr) const; |
238 | 580 |
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581 const T * data (void) const { return slice_data; } |
228 | 582 |
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583 const T * fortran_vec (void) const { return data (); } |
3952 | 584 |
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585 T * fortran_vec (void); |
1560 | 586 |
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587 bool is_shared (void) { return rep->count > 1; } |
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588 |
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589 int ndims (void) const { return dimensions.ndims (); } |
1560 | 590 |
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591 //@{ |
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592 //! Indexing without resizing. |
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593 Array<T> index (const idx_vector& i) const; |
1560 | 594 |
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595 Array<T> index (const idx_vector& i, const idx_vector& j) const; |
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596 |
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597 Array<T> index (const Array<idx_vector>& ia) const; |
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598 //@} |
1560 | 599 |
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600 virtual T resize_fill_value (void) const; |
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601 |
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602 //@{ |
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603 //! Resizing (with fill). |
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604 void resize2 (octave_idx_type nr, octave_idx_type nc, const T& rfv); |
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605 void resize2 (octave_idx_type nr, octave_idx_type nc) |
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606 { |
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607 resize2 (nr, nc, resize_fill_value ()); |
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608 } |
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609 |
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610 void resize1 (octave_idx_type n, const T& rfv); |
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611 void resize1 (octave_idx_type n) { resize1 (n, resize_fill_value ()); } |
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612 |
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613 void resize (const dim_vector& dv, const T& rfv); |
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614 void resize (const dim_vector& dv) { resize (dv, resize_fill_value ()); } |
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615 //@} |
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616 |
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617 //@{ |
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618 //! Indexing with possible resizing and fill |
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619 |
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620 // FIXME: this is really a corner case, that should better be |
8333 | 621 // handled directly in liboctinterp. |
3933 | 622 |
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623 Array<T> index (const idx_vector& i, bool resize_ok, const T& rfv) const; |
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624 Array<T> index (const idx_vector& i, bool resize_ok) const |
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625 { |
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626 return index (i, resize_ok, resize_fill_value ()); |
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627 } |
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628 |
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629 Array<T> index (const idx_vector& i, const idx_vector& j, bool resize_ok, |
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630 const T& rfv) const; |
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631 Array<T> index (const idx_vector& i, const idx_vector& j, |
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632 bool resize_ok) const |
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633 { |
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634 return index (i, j, resize_ok, resize_fill_value ()); |
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635 } |
4513 | 636 |
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637 Array<T> index (const Array<idx_vector>& ia, bool resize_ok, |
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638 const T& rfv) const; |
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639 Array<T> index (const Array<idx_vector>& ia, bool resize_ok) const |
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640 { |
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641 return index (ia, resize_ok, resize_fill_value ()); |
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642 } |
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643 //@} |
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644 |
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645 //@{ |
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646 //! Indexed assignment (always with resize & fill). |
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647 void assign (const idx_vector& i, const Array<T>& rhs, const T& rfv); |
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648 void assign (const idx_vector& i, const Array<T>& rhs) |
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649 { |
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650 assign (i, rhs, resize_fill_value ()); |
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651 } |
4513 | 652 |
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653 void assign (const idx_vector& i, const idx_vector& j, const Array<T>& rhs, |
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654 const T& rfv); |
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655 void assign (const idx_vector& i, const idx_vector& j, const Array<T>& rhs) |
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656 { |
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657 assign (i, j, rhs, resize_fill_value ()); |
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658 } |
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659 |
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660 void assign (const Array<idx_vector>& ia, const Array<T>& rhs, const T& rfv); |
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661 void assign (const Array<idx_vector>& ia, const Array<T>& rhs) |
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662 { |
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663 assign (ia, rhs, resize_fill_value ()); |
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664 } |
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665 //@} |
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666 |
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667 //@{ |
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668 //! Deleting elements. |
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669 |
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670 //! A(I) = [] (with a single subscript) |
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671 void delete_elements (const idx_vector& i); |
4530 | 672 |
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673 //! A(:,...,I,...,:) = [] (>= 2 subscripts, one of them is non-colon) |
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674 void delete_elements (int dim, const idx_vector& i); |
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675 |
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|
676 //! Dispatcher to the above two. |
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|
677 void delete_elements (const Array<idx_vector>& ia); |
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678 //@} |
4513 | 679 |
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680 //! Insert an array into another at a specified position. If |
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681 //! size (a) is [d1 d2 ... dN] and idx is [i1 i2 ... iN], this |
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682 //! method is equivalent to x(i1:i1+d1-1, i2:i2+d2-1, ... , |
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683 //! iN:iN+dN-1) = a. |
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diff
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684 Array<T>& insert (const Array<T>& a, const Array<octave_idx_type>& idx); |
3928 | 685 |
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686 //! This is just a special case for idx = [r c 0 ...] |
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687 Array<T>& insert (const Array<T>& a, octave_idx_type r, octave_idx_type c); |
3933 | 688 |
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ad3afaaa19c1
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diff
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|
689 void maybe_economize (void) |
17769
49a5a4be04a1
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|
690 { |
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|
691 if (rep->count == 1 && slice_len != rep->len) |
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diff
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|
692 { |
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diff
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|
693 ArrayRep *new_rep = new ArrayRep (slice_data, slice_len); |
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|
694 delete rep; |
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Rik <rik@octave.org>
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diff
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|
695 rep = new_rep; |
49a5a4be04a1
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17744
diff
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|
696 slice_data = rep->data; |
49a5a4be04a1
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17744
diff
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|
697 } |
49a5a4be04a1
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diff
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|
698 } |
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ad3afaaa19c1
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diff
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|
699 |
4517 | 700 void print_info (std::ostream& os, const std::string& prefix) const; |
5900 | 701 |
21751
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maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
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|
702 //! Give a pointer to the data in mex format. Unsafe. This function |
b571fc85953f
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|
703 //! exists to support the MEX interface. You should not use it |
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17769
diff
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|
704 //! anywhere else. |
23446
cd4e1ee28716
maint: Use convention 'void * fcn ()' for functions which return pointers.
Rik <rik@octave.org>
parents:
23443
diff
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|
705 void * mex_get_data (void) const { return const_cast<T *> (data ()); } |
7433 | 706 |
9725 | 707 Array<T> sort (int dim = 0, sortmode mode = ASCENDING) const; |
708 Array<T> sort (Array<octave_idx_type> &sidx, int dim = 0, | |
10312
cbc402e64d83
untabify liboctave header files
John W. Eaton <jwe@octave.org>
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diff
changeset
|
709 sortmode mode = ASCENDING) const; |
7503
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|
710 |
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diff
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|
711 //! Ordering is auto-detected or can be specified. |
23588
0549061d35b9
maint: Deprecate is_sorted and replace with issorted.
Rik <rik@octave.org>
parents:
23577
diff
changeset
|
712 sortmode issorted (sortmode mode = UNSORTED) const; |
0549061d35b9
maint: Deprecate is_sorted and replace with issorted.
Rik <rik@octave.org>
parents:
23577
diff
changeset
|
713 |
19006
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Start doxygenising sources
Jordi Gutiérrez Hermoso <jordigh@octave.org>
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diff
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|
714 //! Sort by rows returns only indices. |
8721
e9cb742df9eb
imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
715 Array<octave_idx_type> sort_rows_idx (sortmode mode = ASCENDING) const; |
e9cb742df9eb
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
716 |
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diff
changeset
|
717 //! Ordering is auto-detected or can be specified. |
8721
e9cb742df9eb
imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
718 sortmode is_sorted_rows (sortmode mode = UNSORTED) const; |
e9cb742df9eb
imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents:
8700
diff
changeset
|
719 |
24624
ce2eb28e0a6d
doc: make all Doxygen comment blocks more consistent
Mike Miller <mtmiller@octave.org>
parents:
24534
diff
changeset
|
720 //! Do a binary lookup in a sorted array. Must not contain NaNs. |
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diff
changeset
|
721 //! Mode can be specified or is auto-detected by comparing 1st and last element. |
8814
de16ebeef93d
improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents:
8725
diff
changeset
|
722 octave_idx_type lookup (const T& value, sortmode mode = UNSORTED) const; |
de16ebeef93d
improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents:
8725
diff
changeset
|
723 |
19006
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Jordi Gutiérrez Hermoso <jordigh@octave.org>
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diff
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|
724 //! Ditto, but for an array of values, specializing on the case when values |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
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diff
changeset
|
725 //! are sorted. NaNs get the value N. |
17769
49a5a4be04a1
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Rik <rik@octave.org>
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diff
changeset
|
726 Array<octave_idx_type> lookup (const Array<T>& values, |
49a5a4be04a1
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Rik <rik@octave.org>
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diff
changeset
|
727 sortmode mode = UNSORTED) const; |
9341
9fd5c56ce57a
extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
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9201
diff
changeset
|
728 |
19006
96751a74bbbb
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Jordi Gutiérrez Hermoso <jordigh@octave.org>
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diff
changeset
|
729 //! Count nonzero elements. |
9878
ead4f9c82a9a
implement Array<T>::nnz
Jaroslav Hajek <highegg@gmail.com>
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9840
diff
changeset
|
730 octave_idx_type nnz (void) const; |
ead4f9c82a9a
implement Array<T>::nnz
Jaroslav Hajek <highegg@gmail.com>
parents:
9840
diff
changeset
|
731 |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
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diff
changeset
|
732 //! Find indices of (at most n) nonzero elements. If n is specified, |
19006
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Jordi Gutiérrez Hermoso <jordigh@octave.org>
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diff
changeset
|
733 //! backward specifies search from backward. |
19861
19755f4fc851
maint: Cleanup C++ code to follow Octave coding conventions.
Rik <rik@octave.org>
parents:
19697
diff
changeset
|
734 Array<octave_idx_type> find (octave_idx_type n = -1, |
19755f4fc851
maint: Cleanup C++ code to follow Octave coding conventions.
Rik <rik@octave.org>
parents:
19697
diff
changeset
|
735 bool backward = false) const; |
9025 | 736 |
19006
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Start doxygenising sources
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|
737 //! Returns the n-th element in increasing order, using the same |
21751
b571fc85953f
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|
738 //! ordering as used for sort. n can either be a scalar index or a |
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Jordi Gutiérrez Hermoso <jordigh@octave.org>
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changeset
|
739 //! contiguous range. |
9725 | 740 Array<T> nth_element (const idx_vector& n, int dim = 0) const; |
741 | |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
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|
742 //! Get the kth super or subdiagonal. The zeroth diagonal is the |
19006
96751a74bbbb
Start doxygenising sources
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diff
changeset
|
743 //! ordinary diagonal. |
7620
36594d5bbe13
Move diag function into the octave_value class
David Bateman <dbateman@free.fr>
parents:
7503
diff
changeset
|
744 Array<T> diag (octave_idx_type k = 0) const; |
36594d5bbe13
Move diag function into the octave_value class
David Bateman <dbateman@free.fr>
parents:
7503
diff
changeset
|
745 |
14557
e8e86ae3abbc
make diag (x, m, n) return a proper diagonal matrix object (bug #36099)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
746 Array<T> diag (octave_idx_type m, octave_idx_type n) const; |
e8e86ae3abbc
make diag (x, m, n) return a proper diagonal matrix object (bug #36099)
John W. Eaton <jwe@octave.org>
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diff
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|
747 |
19006
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diff
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|
748 //! Concatenation along a specified (0-based) dimension, equivalent |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
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diff
changeset
|
749 //! to cat(). dim = -1 corresponds to dim = 0 and dim = -2 |
19006
96751a74bbbb
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17769
diff
changeset
|
750 //! corresponds to dim = 1, but apply the looser matching rules of |
96751a74bbbb
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diff
changeset
|
751 //! vertcat/horzcat. |
10531
2dd8ea8bfd71
basic cat functionality in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents:
10521
diff
changeset
|
752 static Array<T> |
2dd8ea8bfd71
basic cat functionality in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents:
10521
diff
changeset
|
753 cat (int dim, octave_idx_type n, const Array<T> *array_list); |
2dd8ea8bfd71
basic cat functionality in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents:
10521
diff
changeset
|
754 |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21660
diff
changeset
|
755 //! Apply function fcn to each element of the Array<T>. This function |
21567
3d25f9f4a62b
maint: Eliminate Britishicisms in the code.
Rik <rik@octave.org>
parents:
21244
diff
changeset
|
756 //! is optimized with a manually unrolled loop. |
21139
538b57866b90
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John W. Eaton <jwe@octave.org>
parents:
21134
diff
changeset
|
757 template <typename U, typename F> |
7503
8c32f95c2639
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David Bateman <dbateman@free.fr>
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diff
changeset
|
758 Array<U> |
8c32f95c2639
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David Bateman <dbateman@free.fr>
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diff
changeset
|
759 map (F fcn) const |
8c32f95c2639
convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents:
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diff
changeset
|
760 { |
20232
a9574e3c6e9e
Deprecate Array::length() and Sparse::length() in favour of ::numel().
Carnë Draug <carandraug@octave.org>
parents:
20229
diff
changeset
|
761 octave_idx_type len = numel (); |
7503
8c32f95c2639
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|
762 |
8c32f95c2639
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diff
changeset
|
763 const T *m = data (); |
8c32f95c2639
convert mapper functions to new format
David Bateman <dbateman@free.fr>
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|
764 |
8c32f95c2639
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diff
changeset
|
765 Array<U> result (dims ()); |
8c32f95c2639
convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents:
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diff
changeset
|
766 U *p = result.fortran_vec (); |
8c32f95c2639
convert mapper functions to new format
David Bateman <dbateman@free.fr>
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diff
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|
767 |
9812
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diff
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|
768 octave_idx_type i; |
f80c566bc751
improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
769 for (i = 0; i < len - 3; i += 4) |
7503
8c32f95c2639
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David Bateman <dbateman@free.fr>
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diff
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|
770 { |
10312
cbc402e64d83
untabify liboctave header files
John W. Eaton <jwe@octave.org>
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diff
changeset
|
771 octave_quit (); |
7503
8c32f95c2639
convert mapper functions to new format
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|
772 |
9812
f80c566bc751
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diff
changeset
|
773 p[i] = fcn (m[i]); |
f80c566bc751
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diff
changeset
|
774 p[i+1] = fcn (m[i+1]); |
f80c566bc751
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diff
changeset
|
775 p[i+2] = fcn (m[i+2]); |
f80c566bc751
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
776 p[i+3] = fcn (m[i+3]); |
7503
8c32f95c2639
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|
777 } |
8c32f95c2639
convert mapper functions to new format
David Bateman <dbateman@free.fr>
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diff
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|
778 |
10142
829e69ec3110
make OCTAVE_QUIT a function
Jaroslav Hajek <highegg@gmail.com>
parents:
10115
diff
changeset
|
779 octave_quit (); |
9812
f80c566bc751
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|
780 |
f80c566bc751
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|
781 for (; i < len; i++) |
f80c566bc751
improve unary mapper system
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diff
changeset
|
782 p[i] = fcn (m[i]); |
f80c566bc751
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diff
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|
783 |
7503
8c32f95c2639
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David Bateman <dbateman@free.fr>
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diff
changeset
|
784 return result; |
8c32f95c2639
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David Bateman <dbateman@free.fr>
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diff
changeset
|
785 } |
8998
a48fba01e4ac
optimize isnan/isinf/isfinite mappers
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8950
diff
changeset
|
786 |
19006
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|
787 //@{ |
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17769
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changeset
|
788 //! Overloads for function references. |
21139
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John W. Eaton <jwe@octave.org>
parents:
21134
diff
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|
789 template <typename U> |
9812
f80c566bc751
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Jaroslav Hajek <highegg@gmail.com>
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|
790 Array<U> |
f80c566bc751
improve unary mapper system
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diff
changeset
|
791 map (U (&fcn) (T)) const |
f80c566bc751
improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
792 { return map<U, U (&) (T)> (fcn); } |
f80c566bc751
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diff
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|
793 |
21139
538b57866b90
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John W. Eaton <jwe@octave.org>
parents:
21134
diff
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|
794 template <typename U> |
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795 Array<U> |
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796 map (U (&fcn) (const T&)) const |
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797 { return map<U, U (&) (const T&)> (fcn); } |
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798 //@} |
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799 |
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800 //! Generic any/all test functionality with arbitrary predicate. |
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801 template <typename F, bool zero> |
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802 bool test (F fcn) const |
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803 { |
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804 return any_all_test<F, T, zero> (fcn, data (), numel ()); |
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805 } |
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806 |
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807 //@{ |
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808 //! Simpler calls. |
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809 template <typename F> |
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810 bool test_any (F fcn) const |
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811 { return test<F, false> (fcn); } |
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812 |
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813 template <typename F> |
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814 bool test_all (F fcn) const |
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815 { return test<F, true> (fcn); } |
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816 //@} |
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817 |
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818 //@{ |
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819 //! Overloads for function references. |
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820 bool test_any (bool (&fcn) (T)) const |
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821 { return test<bool (&) (T), false> (fcn); } |
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822 |
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823 bool test_any (bool (&fcn) (const T&)) const |
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824 { return test<bool (&) (const T&), false> (fcn); } |
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825 |
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826 bool test_all (bool (&fcn) (T)) const |
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827 { return test<bool (&) (T), true> (fcn); } |
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828 |
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829 bool test_all (bool (&fcn) (const T&)) const |
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830 { return test<bool (&) (const T&), true> (fcn); } |
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831 //@} |
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832 |
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833 template <typename U> friend class Array; |
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834 |
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835 //! Returns true if this->dims () == dv, and if so, replaces this->dimensions |
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836 //! by a shallow copy of dv. This is useful for maintaining several arrays |
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837 //! with supposedly equal dimensions (e.g. structs in the interpreter). |
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838 bool optimize_dimensions (const dim_vector& dv); |
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839 |
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840 //@{ |
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841 //! WARNING: Only call these functions from jit |
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842 |
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843 int jit_ref_count (void) { return rep->count.value (); } |
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844 |
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845 T * jit_slice_data (void) const { return slice_data; } |
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846 |
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847 octave_idx_type * jit_dimensions (void) const { return dimensions.to_jit (); } |
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848 |
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849 void * jit_array_rep (void) const { return rep; } |
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850 //@} |
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851 |
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852 private: |
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853 static void instantiation_guard (); |
4513 | 854 }; |
4459 | 855 |
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856 // We use a variadic template for template template parameter so that |
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857 // we don't have to specify all the template parameters and limit this |
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858 // to Container<T>. http://stackoverflow.com/a/20499809/1609556 |
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859 template<typename T> |
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860 template<template <typename...> class Container> |
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861 Array<T>::Array (const Container<T>& a, const dim_vector& dv) |
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862 : dimensions (dv), rep (new typename Array<T>::ArrayRep (dv.safe_numel ())), |
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863 slice_data (rep->data), slice_len (rep->len) |
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864 { |
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865 if (dimensions.safe_numel () != octave_idx_type (a.size ())) |
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866 { |
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867 std::string new_dims_str = dimensions.str (); |
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868 |
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869 (*current_liboctave_error_handler) |
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870 ("reshape: can't reshape %zi elements into %s array", |
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871 a.size (), new_dims_str.c_str ()); |
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872 } |
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873 |
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874 octave_idx_type i = 0; |
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875 for (const T& x : a) |
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876 slice_data[i++] = x; |
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877 |
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878 dimensions.chop_trailing_singletons (); |
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879 } |
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880 |
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881 template <typename T> |
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882 std::ostream& |
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883 operator << (std::ostream& os, const Array<T>& a); |
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884 |
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885 #endif |