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annotate libinterp/corefcn/hex2num.cc @ 17178:f010db8b710c

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hex2num: Add single precision conversion option (bug #39608) * hex2num.cc (Fhex2num): Add optional argument to allow conversion of single precision strings while remaining Matlab-compatible. Update docstring to describe the new argument and behavior. Add test case.
author Mike Miller <mtmiller@ieee.org>
date Sun, 04 Aug 2013 20:35:55 -0400
parents 81d3c4409645
children bc924baa2c4e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 2008-2012 David Bateman
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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 <algorithm>
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28
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29 #include "defun.h"
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30 #include "error.h"
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31 #include "gripes.h"
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32 #include "oct-obj.h"
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33 #include "utils.h"
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34
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35 DEFUN (hex2num, args, ,
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36 "-*- texinfo -*-\n\
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37 @deftypefn {Built-in Function} {@var{n} =} hex2num (@var{s})\n\
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38 @deftypefnx {Built-in Function} {@var{n} =} hex2num (@var{s}, @var{class})\n\
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39 Typecast the 16 character hexadecimal character string to an IEEE 754\n\
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40 double precision number. If fewer than 16 characters are given the\n\
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41 strings are right padded with '0' characters.\n\
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42 \n\
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43 Given a string matrix, @code{hex2num} treats each row as a separate\n\
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44 number.\n\
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45 \n\
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46 @example\n\
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47 @group\n\
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48 hex2num ([\"4005bf0a8b145769\"; \"4024000000000000\"])\n\
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49 @result{} [2.7183; 10.000]\n\
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50 @end group\n\
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51 @end example\n\
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52 \n\
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53 The optional argument @var{class} can be passed as the string \"single\" to\n\
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54 specify that the given string should be interpreted as a single precision\n\
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55 number. In this case, @var{s} should be an 8 character hexadecimal string.\n\
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56 For example:\n\
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57 @example\n\
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58 @group\n\
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59 hex2num ([\"402df854\"; \"41200000\"], \"single\")\n\
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60 @result{} [2.7183; 10.000]\n\
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61 @end group\n\
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62 @end example\n\
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63 @seealso{num2hex, hex2dec, dec2hex}\n\
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64 @end deftypefn")
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65 {
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66 int nargin = args.length ();
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67 octave_value retval;
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68
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69 if (nargin < 1 || nargin > 2)
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70 print_usage ();
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71 else if (nargin == 2 && ! args(1).is_string ())
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72 error ("hex2num: CLASS must be a string");
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73 else
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74 {
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75 const charMatrix cmat = args(0).char_matrix_value ();
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76 std::string prec = (nargin == 2) ? args(1).string_value () : "double";
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77 bool is_single = (prec == "single");
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78 octave_idx_type nchars = (is_single) ? 8 : 16;
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79
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80 if (cmat.columns () > nchars)
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81 error ("hex2num: S must be no more than %d characters", nchars);
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82 else if (prec != "double" && prec != "single")
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83 error ("hex2num: CLASS must be either \"double\" or \"single\"");
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84 else if (! error_state)
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85 {
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86 octave_idx_type nr = cmat.rows ();
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87 octave_idx_type nc = cmat.columns ();
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88
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89 if (is_single)
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90 {
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91 FloatColumnVector m (nr);
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92
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93 for (octave_idx_type i = 0; i < nr; i++)
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94 {
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95 union
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96 {
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97 uint32_t ival;
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98 float dval;
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99 } num;
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100
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101 num.ival = 0;
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102
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103 for (octave_idx_type j = 0; j < nc; j++)
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104 {
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105 unsigned char ch = cmat.elem (i, j);
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106
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107 if (isxdigit (ch))
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108 {
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109 num.ival <<= 4;
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110 if (ch >= 'a')
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111 num.ival += static_cast<uint32_t> (ch - 'a' + 10);
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112 else if (ch >= 'A')
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113 num.ival += static_cast<uint32_t> (ch - 'A' + 10);
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114 else
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115 num.ival += static_cast<uint32_t> (ch - '0');
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116 }
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117 else
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118 {
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119 error ("hex2num: illegal character found in string S");
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120 break;
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121 }
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122 }
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123
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124 if (error_state)
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125 break;
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126 else
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127 {
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128 if (nc < nchars)
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129 num.ival <<= (nchars - nc) * 4;
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130
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131 m(i) = num.dval;
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132 }
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133 }
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134
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135 if (! error_state)
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136 retval = m;
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137 }
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Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
138 else
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
139 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
140 ColumnVector m (nr);
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
141
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
142 for (octave_idx_type i = 0; i < nr; i++)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9689
diff changeset
143 {
17178
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
144 union
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
145 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
146 uint64_t ival;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
147 double dval;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
148 } num;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
149
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
150 num.ival = 0;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
151
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
152 for (octave_idx_type j = 0; j < nc; j++)
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
153 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
154 unsigned char ch = cmat.elem (i, j);
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
155
17178
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
156 if (isxdigit (ch))
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
157 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
158 num.ival <<= 4;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
159 if (ch >= 'a')
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
160 num.ival += static_cast<uint64_t> (ch - 'a' + 10);
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
161 else if (ch >= 'A')
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
162 num.ival += static_cast<uint64_t> (ch - 'A' + 10);
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
163 else
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
164 num.ival += static_cast<uint64_t> (ch - '0');
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
165 }
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
166 else
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
167 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
168 error ("hex2num: illegal character found in string S");
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
169 break;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
170 }
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
171 }
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
172
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
173 if (error_state)
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
174 break;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
175 else
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
176 {
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
177 if (nc < nchars)
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
178 num.ival <<= (nchars - nc) * 4;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
179
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
180 m(i) = num.dval;
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
181 }
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9689
diff changeset
182 }
17178
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
183
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
184 if (! error_state)
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
185 retval = m;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9689
diff changeset
186 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9689
diff changeset
187 }
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
188 }
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
189
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
190 return retval;
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
191 }
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
192
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
193 /*
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
194 %!assert (hex2num (["c00";"bff";"000";"3ff";"400"]), [-2:2]')
17178
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
Mike Miller <mtmiller@ieee.org>
parents: 17177
diff changeset
195 %!assert (hex2num (["c00";"bf8";"000";"3f8";"400"], "single"), single([-2:2])')
8808
d724487d2c4b hex2num.cc: use union to avoid cast and GCC warning
John W. Eaton <jwe@octave.org>
parents: 8807
diff changeset
196 */
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
197
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14501
diff changeset
198 DEFUN (num2hex, args, ,
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
199 "-*- texinfo -*-\n\
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14501
diff changeset
200 @deftypefn {Built-in Function} {@var{s} =} num2hex (@var{n})\n\
17177
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
201 Typecast a double or single precision number or vector to a 8 or 16\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
202 character hexadecimal string of the IEEE 754 representation of the number.\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
203 For example:\n\
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
204 \n\
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
205 @example\n\
9064
7c02ec148a3c Check grammar on all .cc files
Rik <rdrider0-list@yahoo.com>
parents: 9036
diff changeset
206 @group\n\
17177
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
207 num2hex ([-1, 1, e, Inf])\n\
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
208 @result{} \"bff0000000000000\n\
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
209 3ff0000000000000\n\
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
210 4005bf0a8b145769\n\
17177
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
211 7ff0000000000000\"\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
212 @end group\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
213 @end example\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
214 \n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
215 If the argument @var{n} is a single precision number or vector, the returned\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
216 string has a length of 8. For example:\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
217 \n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
218 @example\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
219 @group\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
220 num2hex (single ([-1, 1, e, Inf]))\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
221 @result{} \"bf800000\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
222 3f800000\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
223 402df854\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
224 7f800000\"\n\
9064
7c02ec148a3c Check grammar on all .cc files
Rik <rdrider0-list@yahoo.com>
parents: 9036
diff changeset
225 @end group\n\
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
226 @end example\n\
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
227 @seealso{hex2num, hex2dec, dec2hex}\n\
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
228 @end deftypefn")
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
229 {
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
230 int nargin = args.length ();
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
231 octave_value retval;
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
232
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
233 if (nargin != 1)
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
234 print_usage ();
17177
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
235 else if (args(0).is_single_type ())
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
236 {
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
237 const FloatColumnVector v (args(0).float_vector_value ());
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
238
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
239 if (! error_state)
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
240 {
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
241 octave_idx_type nchars = 8;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
242 octave_idx_type nr = v.length ();
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
243 charMatrix m (nr, nchars);
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
244 const float *pv = v.fortran_vec ();
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
245
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
246 for (octave_idx_type i = 0; i < nr; i++)
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
247 {
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
248 union
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
249 {
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
250 uint32_t ival;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
251 float dval;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
252 } num;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
253
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
254 num.dval = *pv++;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
255
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
256 for (octave_idx_type j = 0; j < nchars; j++)
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
257 {
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
258 unsigned char ch =
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
259 static_cast<char> (num.ival >> ((nchars - 1 - j) * 4) & 0xF);
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
260 if (ch >= 10)
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
261 ch += 'a' - 10;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
262 else
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
263 ch += '0';
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
264
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
265 m.elem (i, j) = ch;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
266 }
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
267 }
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
268
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
269 retval = m;
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
270 }
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
271 }
7639
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
272 else
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
273 {
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
274 const ColumnVector v (args(0).vector_value ());
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
275
b2fbb393a072 Add the num2hex and hex2num functions
David Bateman <dbateman@free.fr>
parents:
diff changeset
276 if (! error_state)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9689
diff changeset
277 {
17177
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
parents: 15195
diff changeset
278 octave_idx_type nchars = 16;
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279 octave_idx_type nr = v.length ();
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280 charMatrix m (nr, nchars);
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281 const double *pv = v.fortran_vec ();
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282
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283 for (octave_idx_type i = 0; i < nr; i++)
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284 {
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285 union
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286 {
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287 uint64_t ival;
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288 double dval;
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289 } num;
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290
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291 num.dval = *pv++;
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292
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293 for (octave_idx_type j = 0; j < nchars; j++)
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294 {
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295 unsigned char ch =
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296 static_cast<char> (num.ival >> ((nchars - 1 - j) * 4) & 0xF);
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297 if (ch >= 10)
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298 ch += 'a' - 10;
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299 else
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300 ch += '0';
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301
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302 m.elem (i, j) = ch;
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303 }
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304 }
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305
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306 retval = m;
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307 }
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308 }
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309
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310 return retval;
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311 }
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312
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313 /*
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314 %!assert (num2hex (-2:2), ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"])
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315 %!assert (num2hex (single (-2:2)), ["c0000000";"bf800000";"00000000";"3f800000";"40000000"])
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316 */