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move more classes inside octave namespace * ov-complex.cc, quit.h, lo-array-errwarn.h, lo-array-errwarn.cc, lo-array-gripes.cc: Move classes inside octave namespace. * NEWS, file-editor-tab.cc, Cell.cc, __qp__.cc, cellfun.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, error.cc, error.h, errwarn.cc, errwarn.h, file-io.cc, gcd.cc, graphics.cc, graphics.in.h, gripes.cc, gripes.h, input.cc, interpreter.cc, interpreter.h, inv.cc, jit-typeinfo.cc, load-path.cc, ls-mat-ascii.cc, ls-mat5.cc, lsode.cc, mex.cc, oct-handle.h, oct-map.cc, oct-stream.cc, quad.cc, rand.cc, sparse-xdiv.cc, sparse-xpow.cc, sparse.cc, sub2ind.cc, toplev.cc, utils.cc, variables.cc, xdiv.cc, xpow.cc, __eigs__.cc, __init_gnuplot__.cc, ov-base-diag.cc, ov-base-mat.cc, ov-base-scalar.cc, ov-base-sparse.cc, ov-base.cc, ov-class.cc, ov-classdef.cc, ov-complex.h, ov-complex.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-fcn-handle.cc, ov-float.cc, ov-float.h, ov-flt-complex.h, ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-java.cc, ov-oncleanup.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-re-mat.cc, ov-re-sparse.cc, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc, ov.cc, op-cs-cs.cc, op-fcs-fcs.cc, op-fs-fs.cc, op-int.h, op-s-s.cc, ops.h, oct-parse.in.yy, pt-assign.cc, pt-eval.cc, pt-idx.cc, pt.cc, Array-util.cc, Array.cc, CColVector.cc, CDiagMatrix.cc, CMatrix.cc, CNDArray.cc, CRowVector.cc, CSparse.cc, DiagArray2.cc, MDiagArray2.cc, MSparse.cc, PermMatrix.cc, Range.cc, Sparse.cc, dColVector.cc, dDiagMatrix.cc, dMatrix.cc, dNDArray.cc, dRowVector.cc, dSparse.cc, fCColVector.cc, fCDiagMatrix.cc, fCMatrix.cc, fCNDArray.cc, fCRowVector.cc, fColVector.cc, fDiagMatrix.cc, fMatrix.cc, fNDArray.cc, fRowVector.cc, idx-vector.cc, quit.cc, quit.h, gepbalance.cc, Sparse-diag-op-defs.h, Sparse-op-defs.h, Sparse-perm-op-defs.h, mx-inlines.cc, mx-op-defs.h, cmd-edit.cc, lo-array-errwarn.cc, lo-array-errwarn.h, lo-array-gripes.cc, lo-array-gripes.h, oct-binmap.h: Update to use namespace.
author John W. Eaton <jwe@octave.org>
date Wed, 17 Aug 2016 03:41:42 -0400
parents bac0d6f07a3e
children 34ce5be04942
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1 /*
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2
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3 Copyright (C) 2004-2016 David Bateman
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4 Copyright (C) 2010 Jaroslav Hajek, Jordi Gutiérrez Hermoso
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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22 */
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23
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24 #if defined (HAVE_CONFIG_H)
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25 # include "config.h"
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26 #endif
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27
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28 #include "dNDArray.h"
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29 #include "CNDArray.h"
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30 #include "fNDArray.h"
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31 #include "fCNDArray.h"
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32 #include "lo-mappers.h"
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33 #include "oct-binmap.h"
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34
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35 #include "defun.h"
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36 #include "error.h"
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37 #include "ovl.h"
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39 static double
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40 simple_gcd (double a, double b)
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41 {
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42 if (! octave::math::isinteger (a) || ! octave::math::isinteger (b))
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43 error ("gcd: all values must be integers");
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44
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45 double aa = fabs (a);
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46 double bb = fabs (b);
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47
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48 while (bb != 0)
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49 {
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50 double tt = fmod (aa, bb);
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51 aa = bb;
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52 bb = tt;
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53 }
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54
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55 return aa;
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56 }
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57
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58 // Don't use the Complex and FloatComplex typedefs because we need to
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59 // refer to the actual float precision FP in the body (and when gcc
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60 // implements template aliases from C++0x, can do a small fix here).
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61 template <typename FP>
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62 static void
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63 divide (const std::complex<FP>& a, const std::complex<FP>& b,
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64 std::complex<FP>& q, std::complex<FP>& r)
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65 {
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66 FP qr = std::floor ((a/b).real () + 0.5);
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67 FP qi = std::floor ((a/b).imag () + 0.5);
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68
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69 q = std::complex<FP> (qr, qi);
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70
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71 r = a - q*b;
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72 }
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73
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74 template <typename FP>
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75 static std::complex<FP>
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76 simple_gcd (const std::complex<FP>& a, const std::complex<FP>& b)
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77 {
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78 if (! octave::math::isinteger (a.real ()) || ! octave::math::isinteger (a.imag ())
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79 || ! octave::math::isinteger (b.real ()) || ! octave::math::isinteger (b.imag ()))
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80 error ("gcd: all complex parts must be integers");
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81
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82 std::complex<FP> aa = a;
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83 std::complex<FP> bb = b;
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84
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85 if (abs (aa) < abs (bb))
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86 std::swap (aa, bb);
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87
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88 while (abs (bb) != 0)
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89 {
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90 std::complex<FP> qq, rr;
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91 divide (aa, bb, qq, rr);
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92 aa = bb;
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93 bb = rr;
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94 }
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95
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96 return aa;
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97 }
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98
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99 template <typename T>
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100 static octave_int<T>
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101 simple_gcd (const octave_int<T>& a, const octave_int<T>& b)
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102 {
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103 T aa = a.abs ().value ();
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104 T bb = b.abs ().value ();
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105
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106 while (bb != 0)
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107 {
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108 T tt = aa % bb;
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109 aa = bb;
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110 bb = tt;
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111 }
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112
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113 return aa;
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114 }
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115
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116 static double
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117 extended_gcd (double a, double b, double& x, double& y)
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118 {
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119 if (! octave::math::isinteger (a) || ! octave::math::isinteger (b))
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120 error ("gcd: all values must be integers");
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121
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122 double aa = fabs (a);
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123 double bb = fabs (b);
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124
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125 double xx, lx, yy, ly;
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126 xx = 0, lx = 1;
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127 yy = 1, ly = 0;
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128
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129 while (bb != 0)
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130 {
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131 double qq = std::floor (aa / bb);
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132 double tt = fmod (aa, bb);
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133
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134 aa = bb;
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135 bb = tt;
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136
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137 double tx = lx - qq*xx;
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138 lx = xx;
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139 xx = tx;
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140
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141 double ty = ly - qq*yy;
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142 ly = yy;
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143 yy = ty;
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144 }
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145
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146 x = a >= 0 ? lx : -lx;
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147 y = b >= 0 ? ly : -ly;
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148
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149 return aa;
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150 }
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151
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152 template <typename FP>
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153 static std::complex<FP>
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154 extended_gcd (const std::complex<FP>& a, const std::complex<FP>& b,
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155 std::complex<FP>& x, std::complex<FP>& y)
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156 {
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157 if (! octave::math::isinteger (a.real ()) || ! octave::math::isinteger (a.imag ())
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158 || ! octave::math::isinteger (b.real ()) || ! octave::math::isinteger (b.imag ()))
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159 error ("gcd: all complex parts must be integers");
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160
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161 std::complex<FP> aa = a;
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162 std::complex<FP> bb = b;
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163 bool swapped = false;
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164 if (abs (aa) < abs (bb))
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165 {
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166 std::swap (aa, bb);
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167 swapped = true;
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168 }
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169
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170 std::complex<FP> xx, lx, yy, ly;
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171 xx = 0, lx = 1;
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172 yy = 1, ly = 0;
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173
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174 while (abs(bb) != 0)
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175 {
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176 std::complex<FP> qq, rr;
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177 divide (aa, bb, qq, rr);
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178 aa = bb;
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179 bb = rr;
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180
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181 std::complex<FP> tx = lx - qq*xx;
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182 lx = xx;
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183 xx = tx;
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184
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185 std::complex<FP> ty = ly - qq*yy;
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186 ly = yy;
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187 yy = ty;
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188 }
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189
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190 x = lx;
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191 y = ly;
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192
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193 if (swapped)
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194 std::swap (x, y);
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195
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196 return aa;
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197 }
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198
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199 template <typename T>
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200 static octave_int<T>
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201 extended_gcd (const octave_int<T>& a, const octave_int<T>& b,
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202 octave_int<T>& x, octave_int<T>& y)
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203 {
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204 T aa = a.abs ().value ();
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205 T bb = b.abs ().value ();
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206 T xx, lx, yy, ly;
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207 xx = 0, lx = 1;
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208 yy = 1, ly = 0;
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209
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210 while (bb != 0)
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211 {
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212 T qq = aa / bb;
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213 T tt = aa % bb;
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214 aa = bb;
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215 bb = tt;
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216
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217 T tx = lx - qq*xx;
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218 lx = xx;
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219 xx = tx;
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220
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221 T ty = ly - qq*yy;
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222 ly = yy;
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223 yy = ty;
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224 }
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225
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226 x = octave_int<T> (lx) * a.signum ();
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227 y = octave_int<T> (ly) * b.signum ();
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228
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229 return aa;
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230 }
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231
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232 template <typename NDA>
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233 static octave_value
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234 do_simple_gcd (const octave_value& a, const octave_value& b)
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235 {
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236 typedef typename NDA::element_type T;
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237 octave_value retval;
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238
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239 if (a.is_scalar_type () && b.is_scalar_type ())
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240 {
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241 // Optimize scalar case.
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242 T aa = octave_value_extract<T> (a);
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243 T bb = octave_value_extract<T> (b);
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244 retval = simple_gcd (aa, bb);
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245 }
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246 else
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247 {
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248 NDA aa = octave_value_extract<NDA> (a);
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249 NDA bb = octave_value_extract<NDA> (b);
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250 retval = binmap<T> (aa, bb, simple_gcd, "gcd");
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251 }
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252
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253 return retval;
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254 }
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255
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256 // Dispatcher
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257 static octave_value
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258 do_simple_gcd (const octave_value& a, const octave_value& b)
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259 {
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260 octave_value retval;
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261 builtin_type_t btyp = btyp_mixed_numeric (a.builtin_type (),
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262 b.builtin_type ());
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263 switch (btyp)
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264 {
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265 case btyp_double:
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266 if (a.is_sparse_type () && b.is_sparse_type ())
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267 {
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268 retval = do_simple_gcd<SparseMatrix> (a, b);
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269 break;
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270 }
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271 // fall through!
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272
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273 case btyp_float:
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274 retval = do_simple_gcd<NDArray> (a, b);
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275 break;
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276
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277 #define MAKE_INT_BRANCH(X) \
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278 case btyp_ ## X: \
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279 retval = do_simple_gcd<X ## NDArray> (a, b); \
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280 break
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281
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282 MAKE_INT_BRANCH (int8);
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283 MAKE_INT_BRANCH (int16);
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284 MAKE_INT_BRANCH (int32);
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285 MAKE_INT_BRANCH (int64);
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286 MAKE_INT_BRANCH (uint8);
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287 MAKE_INT_BRANCH (uint16);
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288 MAKE_INT_BRANCH (uint32);
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289 MAKE_INT_BRANCH (uint64);
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290
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291 #undef MAKE_INT_BRANCH
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292
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293 case btyp_complex:
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294 retval = do_simple_gcd<ComplexNDArray> (a, b);
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295 break;
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296
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297 case btyp_float_complex:
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298 retval = do_simple_gcd<FloatComplexNDArray> (a, b);
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299 break;
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300
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301 default:
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302 error ("gcd: invalid class combination for gcd: %s and %s\n",
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303 a.class_name ().c_str (), b.class_name ().c_str ());
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304 }
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305
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306 if (btyp == btyp_float)
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307 retval = retval.float_array_value ();
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308
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309 return retval;
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310 }
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311
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312 template <typename NDA>
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313 static octave_value
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314 do_extended_gcd (const octave_value& a, const octave_value& b,
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315 octave_value& x, octave_value& y)
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316 {
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317 typedef typename NDA::element_type T;
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318 octave_value retval;
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319
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320 if (a.is_scalar_type () && b.is_scalar_type ())
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321 {
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322 // Optimize scalar case.
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323 T aa = octave_value_extract<T> (a);
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324 T bb = octave_value_extract<T> (b);
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diff changeset
325 T xx, yy;
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326 retval = extended_gcd (aa, bb, xx, yy);
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327 x = xx;
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328 y = yy;
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329 }
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330 else
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331 {
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332 NDA aa = octave_value_extract<NDA> (a);
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333 NDA bb = octave_value_extract<NDA> (b);
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334
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335 dim_vector dv = aa.dims ();
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336 if (aa.numel () == 1)
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337 dv = bb.dims ();
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338 else if (bb.numel () != 1 && bb.dims () != dv)
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d0562b3159c7 move more classes inside octave namespace
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diff changeset
339 octave::err_nonconformant ("gcd", a.dims (), b.dims ());
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340
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341 NDA gg (dv), xx (dv), yy (dv);
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342
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343 const T *aptr = aa.fortran_vec ();
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344 const T *bptr = bb.fortran_vec ();
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345
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346 bool inca = aa.numel () != 1;
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347 bool incb = bb.numel () != 1;
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348
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349 T *gptr = gg.fortran_vec ();
18100
6a71e5030df5 Follow coding convention of defining and initializing only 1 variable per line in liboctinterp.
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350 T *xptr = xx.fortran_vec ();
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351 T *yptr = yy.fortran_vec ();
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352
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353 octave_idx_type n = gg.numel ();
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354 for (octave_idx_type i = 0; i < n; i++)
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355 {
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356 octave_quit ();
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357
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358 *gptr++ = extended_gcd (*aptr, *bptr, *xptr++, *yptr++);
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359
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360 aptr += inca;
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361 bptr += incb;
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362 }
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diff changeset
363
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364 x = xx;
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365 y = yy;
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366
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367 retval = gg;
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368 }
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369
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370 return retval;
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371 }
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372
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373 // Dispatcher
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374 static octave_value
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375 do_extended_gcd (const octave_value& a, const octave_value& b,
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376 octave_value& x, octave_value& y)
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377 {
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378 octave_value retval;
11064
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diff changeset
379
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diff changeset
380 builtin_type_t btyp = btyp_mixed_numeric (a.builtin_type (),
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381 b.builtin_type ());
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diff changeset
382 switch (btyp)
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diff changeset
383 {
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384 case btyp_double:
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385 case btyp_float:
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386 retval = do_extended_gcd<NDArray> (a, b, x, y);
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diff changeset
387 break;
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388
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389 #define MAKE_INT_BRANCH(X) \
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390 case btyp_ ## X: \
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391 retval = do_extended_gcd<X ## NDArray> (a, b, x, y); \
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diff changeset
392 break
11064
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393
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394 MAKE_INT_BRANCH (int8);
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395 MAKE_INT_BRANCH (int16);
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396 MAKE_INT_BRANCH (int32);
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397 MAKE_INT_BRANCH (int64);
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diff changeset
398 MAKE_INT_BRANCH (uint8);
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diff changeset
399 MAKE_INT_BRANCH (uint16);
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400 MAKE_INT_BRANCH (uint32);
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diff changeset
401 MAKE_INT_BRANCH (uint64);
11064
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diff changeset
402
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diff changeset
403 #undef MAKE_INT_BRANCH
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diff changeset
404
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diff changeset
405 case btyp_complex:
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diff changeset
406 retval = do_extended_gcd<ComplexNDArray> (a, b, x, y);
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diff changeset
407 break;
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408
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diff changeset
409 case btyp_float_complex:
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diff changeset
410 retval = do_extended_gcd<FloatComplexNDArray> (a, b, x, y);
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diff changeset
411 break;
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diff changeset
412
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diff changeset
413 default:
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diff changeset
414 error ("gcd: invalid class combination for gcd: %s and %s\n",
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
415 a.class_name ().c_str (), b.class_name ().c_str ());
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
416 }
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
417
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
418 // For consistency.
20555
f90c8372b7ba eliminate many more simple uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20172
diff changeset
419 if (a.is_sparse_type () && b.is_sparse_type ())
11021
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
420 {
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
421 retval = retval.sparse_matrix_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
422 x = x.sparse_matrix_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
423 y = y.sparse_matrix_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
424 }
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
425
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
426 if (btyp == btyp_float)
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
427 {
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
428 retval = retval.float_array_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
429 x = x.float_array_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
430 y = y.float_array_value ();
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
431 }
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
432
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
433 return retval;
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
434 }
0ee74d581c00 optimize & rewrite gcd
Jaroslav Hajek <highegg@gmail.com>
parents: 10840
diff changeset
435
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
436 DEFUN (gcd, args, nargout,
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
437 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
438 @deftypefn {} {@var{g} =} gcd (@var{a1}, @var{a2}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
439 @deftypefnx {} {[@var{g}, @var{v1}, @dots{}] =} gcd (@var{a1}, @var{a2}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
440 Compute the greatest common divisor of @var{a1}, @var{a2}, @dots{}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
441
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
442 If more than one argument is given then all arguments must be the same size
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
443 or scalar. In this case the greatest common divisor is calculated for each
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
444 element individually. All elements must be ordinary or Gaussian (complex)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
445 integers. Note that for Gaussian integers, the gcd is only unique up to a
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
446 phase factor (multiplication by 1, -1, i, or -i), so an arbitrary greatest
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
447 common divisor among the four possible is returned.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
448
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
449 Optional return arguments @var{v1}, @dots{}, contain integer vectors such
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
450 that,
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
451
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
452 @tex
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
453 $g = v_1 a_1 + v_2 a_2 + \cdots$
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
454 @end tex
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
455 @ifnottex
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
456
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
457 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
458 @var{g} = @var{v1} .* @var{a1} + @var{v2} .* @var{a2} + @dots{}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
459 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
460
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
461 @end ifnottex
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
462
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
463 Example code:
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
464
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
465 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
466 @group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
467 gcd ([15, 9], [20, 18])
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
468 @result{} 5 9
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
469 @end group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
470 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
471
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
472 @seealso{lcm, factor, isprime}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
473 @end deftypefn */)
4864
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jwe
parents:
diff changeset
474 {
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
475 int nargin = args.length ();
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
476
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
477 if (nargin < 2)
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
478 print_usage ();
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
479
20939
b17fda023ca6 maint: Use new C++ archetype in more files.
Rik <rik@octave.org>
parents: 20853
diff changeset
480 octave_value_list retval;
b17fda023ca6 maint: Use new C++ archetype in more files.
Rik <rik@octave.org>
parents: 20853
diff changeset
481
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
482 if (nargout > 1)
4864
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jwe
parents:
diff changeset
483 {
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
484 retval.resize (nargin + 1);
11064
61a6c99d8ff7 gcd.cc: style fixes
John W. Eaton <jwe@octave.org>
parents: 11062
diff changeset
485
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
486 retval(0) = do_extended_gcd (args(0), args(1), retval(1), retval(2));
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
487
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
488 for (int j = 2; j < nargin; j++)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9167
diff changeset
489 {
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
490 octave_value x;
20939
b17fda023ca6 maint: Use new C++ archetype in more files.
Rik <rik@octave.org>
parents: 20853
diff changeset
491 retval(0) = do_extended_gcd (retval(0), args(j), x, retval(j+1));
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
492 for (int i = 0; i < j; i++)
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
493 retval(i+1).assign (octave_value::op_el_mul_eq, x);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9167
diff changeset
494 }
7815
a41df65f3f00 Add some single precision test code and fix resulting bugs
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
495 }
4864
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jwe
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diff changeset
496 else
20802
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
497 {
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
498 retval(0) = do_simple_gcd (args(0), args(1));
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
499
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
500 for (int j = 2; j < nargin; j++)
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
501 retval(0) = do_simple_gcd (retval(0), args(j));
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20650
diff changeset
502 }
4864
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jwe
parents:
diff changeset
503
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
504 return retval;
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
505 }
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
506
d49d761c8c93 [project @ 2004-04-16 16:01:11 by jwe]
jwe
parents:
diff changeset
507 /*
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
508 %!assert (gcd (200, 300, 50, 35), 5)
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
509 %!assert (gcd (int16 (200), int16 (300), int16 (50), int16 (35)), int16 (5))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
510 %!assert (gcd (uint64 (200), uint64 (300), uint64 (50), uint64 (35)), uint64 (5))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
511 %!assert (gcd (18-i, -29+3i), -3-4i)
7815
a41df65f3f00 Add some single precision test code and fix resulting bugs
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
512
19132
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
513 %!test
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
514 %! p = [953 967];
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
515 %! u = [953 + i*971, 967 + i*977];
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
516 %! [d, k(1), k(2)] = gcd (p(1), p(2));
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
517 %! [z, w(1), w(2)] = gcd (u(1), u(2));
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
518 %! assert (d, 1);
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
519 %! assert (sum (p.*k), d);
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
520 %! assert (abs (z), sqrt (2));
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
521 %! assert (abs (sum (u.*w)), sqrt (2));
19132
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
522
21581
6fab85c1538f maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents: 21580
diff changeset
523 %!error <all values must be integers> gcd (1/2, 2)
6fab85c1538f maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents: 21580
diff changeset
524 %!error <all complex parts must be integers> gcd (e + i*pi, 1)
19132
c3bdd640a4dd * gcd.cc: add more tests
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 18100
diff changeset
525
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
526 %!error gcd ()
7815
a41df65f3f00 Add some single precision test code and fix resulting bugs
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
527
a41df65f3f00 Add some single precision test code and fix resulting bugs
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
528 %!test
a41df65f3f00 Add some single precision test code and fix resulting bugs
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
529 %! s.a = 1;
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
530 %! fail ("gcd (s)");
4864
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jwe
parents:
diff changeset
531 */