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annotate libinterp/corefcn/sub2ind.cc @ 20940:48b2ad5ee801

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maint: Rename oct-obj.[cc|h] to ovl.[cc|h] for clarity. * libinterp/corefcn/oct-obj.h: Replaced. Contains a #warning issued if used in compilation and includes "ovl.h" instead. Original file renamed to libinterp/octave-value/ovl.h * libinterp/corefcn/oct-obj.cc: Renamed to libinterp/octave-value/ovl.cc. * oct-obj.cc (ovl ()): Added new function to return empty octave_value_list. * libinterp/corefcn/module.mk: Remove oct-obj.cc from build system. * libinterp/octave-value/module.mk: Add ovl.h and ovl.cc to build system. * mk-opts.pl, annotation-dialog.h, Cell.cc, __contourc__.cc, __dsearchn__.cc, __lin_interpn__.cc, __pchip_deriv__.cc, __qp__.cc, balance.cc, besselj.cc, betainc.cc, colloc.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, debug.cc, defaults.cc, defun.cc, det.cc, dirfns.cc, dlmread.cc, eig.cc, error.cc, fft.cc, fft2.cc, fftn.cc, file-io.cc, filter.cc, find.cc, gammainc.cc, gcd.cc, getgrent.cc, getpwent.cc, getrusage.cc, givens.cc, graphics.cc, gripes.cc, help.cc, hess.cc, hex2num.cc, hook-fcn.h, input.cc, input.h, inv.cc, kron.cc, load-save.cc, lookup.cc, ls-hdf5.cc, ls-mat-ascii.cc, ls-mat4.cc, ls-mat5.cc, ls-oct-binary.cc, ls-oct-text.cc, lsode.cc, lu.cc, luinc.cc, max.cc, mex.cc, oct-hist.cc, oct-lvalue.cc, oct-lvalue.h, oct-map.h, oct-stream.cc, oct.h, ordschur.cc, pager.cc, pinv.cc, pr-output.cc, quad.cc, quadcc.cc, qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, sparse-xpow.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc, symtab.h, syscalls.cc, sysdep.cc, time.cc, toplev.cc, tril.cc, tsearch.cc, typecast.cc, urlwrite.cc, utils.cc, variables.cc, xpow.cc, __delaunayn__.cc, __glpk__.cc, __voronoi__.cc, audiodevinfo.cc, audioread.cc, chol.cc, convhulln.cc, dmperm.cc, qr.cc, symbfact.cc, mkbuiltins, ov-base-diag.h, ov-base-int.cc, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-sparse.cc, ov-base-sparse.h, ov-base.cc, ov-bool-mat.cc, ov-bool.cc, ov-builtin.cc, ov-cell.cc, ov-colon.cc, ov-complex.cc, ov-cs-list.h, ov-cx-mat.cc, ov-dld-fcn.cc, ov-fcn.cc, ov-fcn.h, ov-float.cc, ov-flt-complex.cc, ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-int16.cc, ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-java.h, ov-mex-fcn.cc, ov-perm.h, ov-range.cc, ov-re-mat.cc, ov-scalar.cc, ov-str-mat.cc, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc, ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, octave.cc, op-b-b.cc, op-b-bm.cc, op-b-sbm.cc, op-bm-b.cc, op-bm-bm.cc, op-bm-sbm.cc, op-cdm-cdm.cc, op-cell.cc, op-chm.cc, op-class.cc, op-cm-cm.cc, op-cm-cs.cc, op-cm-m.cc, op-cm-s.cc, op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc, op-cs-s.cc, op-cs-scm.cc, op-cs-sm.cc, op-dm-dm.cc, op-dm-scm.cc, op-dm-sm.cc, op-double-conv.cc, op-fcdm-fcdm.cc, op-fcdm-fdm.cc, op-fcm-fcm.cc, op-fcm-fcs.cc, op-fcm-fm.cc, op-fcm-fs.cc, op-fcn.cc, op-fcs-fcm.cc, op-fcs-fcs.cc, op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fdm.cc, op-float-conv.cc, op-fm-fcm.cc, op-fm-fcs.cc, op-fm-fm.cc, op-fm-fs.cc, op-fs-fcm.cc, op-fs-fcs.cc, op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc, op-i32-i32.cc, op-i64-i64.cc, op-i8-i8.cc, op-int-concat.cc, op-int-conv.cc, op-m-cm.cc, op-m-cs.cc, op-m-m.cc, op-m-s.cc, op-m-scm.cc, op-m-sm.cc, op-pm-pm.cc, op-pm-scm.cc, op-pm-sm.cc, op-range.cc, op-s-cm.cc, op-s-cs.cc, op-s-m.cc, op-s-s.cc, op-s-scm.cc, op-s-sm.cc, op-sbm-b.cc, op-sbm-bm.cc, op-sbm-sbm.cc, op-scm-cm.cc, op-scm-cs.cc, op-scm-m.cc, op-scm-s.cc, op-scm-scm.cc, op-scm-sm.cc, op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc, op-sm-s.cc, op-sm-scm.cc, op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc, op-struct.cc, op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc, parse.h, pt-arg-list.cc, pt-assign.cc, pt-binop.cc, pt-cbinop.cc, pt-cell.cc, pt-colon.cc, pt-const.cc, pt-eval.h, pt-fcn-handle.cc, pt-funcall.h, pt-id.cc, pt-idx.cc, pt-jump.cc, pt-mat.cc, pt-select.cc, pt-unop.cc, token.cc, Array-sym.cc: replace '#include "oct-obj.h"' with '#include "ovl.h"'.
author Rik <rik@octave.org>
date Fri, 18 Dec 2015 16:04:56 -0800
parents b17fda023ca6
children 850e3d2533d4
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1 /*
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2
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3 Copyright (C) 2009-2015 VZLU Prague
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "Array-util.h"
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28 #include "oct-locbuf.h"
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29 #include "quit.h"
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31 #include "defun.h"
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32 #include "error.h"
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33 #include "gripes.h"
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34 #include "ovl.h"
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36
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37 static dim_vector
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38 get_dim_vector (const octave_value& val, const char *name)
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39 {
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40 RowVector dimsv = val.row_vector_value (false, true);
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41 dim_vector dv;
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42 octave_idx_type n = dimsv.numel ();
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43
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44 if (n < 1)
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45 error ("%s: dimension vector DIMS must not be empty", name);
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46 else
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47 {
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48 dv.resize (std::max (n, static_cast<octave_idx_type> (2)));
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49 dv(1) = 1;
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50 for (octave_idx_type i = 0; i < n; i++)
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51 {
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52 octave_idx_type ii = dimsv(i);
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53 if (ii == dimsv(i) && ii >= 0)
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54 dv(i) = ii;
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55 else
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56 {
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57 error ("%s: dimension vector DIMS must contain integers", name);
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58 break;
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59 }
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60 }
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61 }
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62
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63 return dv;
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64 }
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65
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66 DEFUN (sub2ind, args, ,
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67 "-*- texinfo -*-\n\
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68 @deftypefn {} {@var{ind} =} sub2ind (@var{dims}, @var{i}, @var{j})\n\
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69 @deftypefnx {} {@var{ind} =} sub2ind (@var{dims}, @var{s1}, @var{s2}, @dots{}, @var{sN})\n\
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70 Convert subscripts to a linear index.\n\
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71 \n\
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72 The following example shows how to convert the two-dimensional index\n\
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73 @code{(2,3)} of a 3-by-3 matrix to a linear index. The matrix is linearly\n\
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74 indexed moving from one column to next, filling up all rows in each column.\n\
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75 \n\
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76 @example\n\
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77 @group\n\
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78 linear_index = sub2ind ([3, 3], 2, 3)\n\
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79 @result{} 8\n\
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80 @end group\n\
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81 @end example\n\
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82 @seealso{ind2sub}\n\
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83 @end deftypefn")
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84 {
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85 int nargin = args.length ();
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86
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87 if (nargin < 2)
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88 print_usage ();
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89
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90 dim_vector dv = get_dim_vector (args(0), "sub2ind");
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91 Array<idx_vector> idxa (dim_vector (nargin-1, 1));
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92
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93 dv = dv.redim (nargin - 1);
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94 for (int j = 0; j < nargin - 1; j++)
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95 {
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96 if (! args(j+1).is_numeric_type ())
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97 error ("sub2ind: subscripts must be numeric");
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98
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99 try
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100 {
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101 idxa(j) = args(j+1).index_vector ();
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102
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103 if (j > 0 && args(j+1).dims () != args(1).dims ())
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104 error ("sub2ind: all subscripts must be of the same size");
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105 }
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106 catch (index_exception& e)
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107 {
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108 e.set_pos_if_unset (nargin-1, j+1);
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109 e.set_var ();
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110 std::string msg = e.message ();
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111 error_with_id (e.err_id (), msg.c_str ());
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112 }
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113 }
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114
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115 return ovl (sub2ind (dv, idxa));
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116 }
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117
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118 /*
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119 ## Test evaluation
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120 %!test
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121 %! s1 = [ 1 1 1 1 ; 2 2 2 2 ];
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122 %! s2 = [ 1 1 2 2 ; 1 1 2 2 ];
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123 %! s3 = [ 1 2 1 2 ; 1 2 1 2 ];
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124 %! in = [ 1 101 11 111 ; 2 102 12 112 ];
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125 %! assert (sub2ind ([10 10 10], s1, s2, s3), in);
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126
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127 # Test low index
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128 %!assert (sub2ind ([10 10 10], 1, 1, 1), 1)
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129 %!error <index \(0,_,_\)> sub2ind ([10 10 10], 0, 1, 1)
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130 %!error <index \(_,0,_\)> sub2ind ([10 10 10], 1, 0, 1)
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131 %!error <index \(_,_,0\)> sub2ind ([10 10 10], 1, 1, 0)
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132
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133 # Test high index
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134 %!assert (sub2ind ([10 10 10], 10, 10, 10), 1000)
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135 %!error <index \(11,_,_\): out of bound 10> sub2ind ([10 10 10], 11, 10, 10)
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136 %!error <index \(_,11,_\): out of bound 10> sub2ind ([10 10 10], 10, 11, 10)
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137 %!error <index \(_,_,11\): out of bound 10> sub2ind ([10 10 10], 10, 10, 11)
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138
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139 # Test high index in the trailing dimensions
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140 %!assert (sub2ind ([10, 1], 2, 1, 1), 2)
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141 %!error <index \(_,2,_\): out of bound 1> sub2ind ([10, 1], 1, 2, 1)
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142 %!error <index \(_,_,2\): out of bound 1> sub2ind ([10, 1], 1, 1, 2)
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143 %!assert (sub2ind ([10 10], 2, 2, 1), 12)
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144 %!error <index \(_,_,2\): out of bound 1> sub2ind ([10 10], 2, 1, 2)
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145 %!error <index \(_,_,2\): out of bound 1> sub2ind ([10 10], 1, 2, 2)
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146
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147 # Test handling of empty arguments
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148 %!assert (sub2ind ([10 10], zeros (0,0), zeros (0,0)), zeros (0,0))
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149 %!assert (sub2ind ([10 10], zeros (2,0), zeros (2,0)), zeros (2,0))
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150 %!assert (sub2ind ([10 10], zeros (0,2), zeros (0,2)), zeros (0,2))
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151 %!error <all subscripts .* same size> sub2ind ([10 10 10], zeros (0,2), zeros (2,0))
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152
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153 # Test handling of arguments of different size
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154 %!error <all subscripts .* same size> sub2ind ([10 10], ones (1,2), ones (1,3))
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155 %!error <all subscripts .* same size> sub2ind ([10 10], ones (1,2), ones (2,1))
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156
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157 ## Test input validation
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158 %!error <dimension vector> sub2ind ([10 10.5], 1, 1)
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159 %!error <index \(1.5,_\)> sub2ind ([10 10], 1.5, 1)
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160 %!error <index \(_,1.5\)> sub2ind ([10 10], 1, 1.5)
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161 */
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162
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163 DEFUN (ind2sub, args, nargout,
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164 "-*- texinfo -*-\n\
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165 @deftypefn {} {[@var{s1}, @var{s2}, @dots{}, @var{sN}] =} ind2sub (@var{dims}, @var{ind})\n\
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166 Convert a linear index to subscripts.\n\
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167 \n\
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168 The following example shows how to convert the linear index @code{8}\n\
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169 in a 3-by-3 matrix into a subscript. The matrix is linearly indexed\n\
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170 moving from one column to next, filling up all rows in each column.\n\
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171 \n\
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172 @example\n\
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173 @group\n\
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174 [r, c] = ind2sub ([3, 3], 8)\n\
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175 @result{} r = 2\n\
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176 @result{} c = 3\n\
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177 @end group\n\
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178 @end example\n\
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179 @seealso{sub2ind}\n\
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180 @end deftypefn")
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181 {
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182 if (args.length () != 2)
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183 print_usage ();
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184
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185 octave_value_list retval;
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186
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187 dim_vector dv = get_dim_vector (args(0), "ind2sub");
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188
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189 try
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190 {
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191 idx_vector idx = args(1).index_vector ();
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192
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193 if (nargout > dv.length ())
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194 dv = dv.redim (nargout);
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195
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196 retval = Array<octave_value> (ind2sub (dv, idx));
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197 }
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198 catch (const index_exception& e)
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199 {
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200 std::string idx = e.idx ();
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201 std::string msg = e.details ();
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202 error ("ind2sub: Invalid index %s. %s", idx.c_str (), msg.c_str ());
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203 }
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204
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205 return retval;
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206 }