Mercurial > octave
annotate src/corefcn/hex2num.cc @ 15039:e753177cde93
maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
* __contourc__.cc, __dispatch__.cc, __lin_interpn__.cc, __pchip_deriv__.cc,
__qp__.cc, balance.cc, besselj.cc, betainc.cc, bsxfun.cc, cellfun.cc,
colloc.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, det.cc, dlmread.cc, dot.cc,
eig.cc, fft.cc, fft2.cc, fftn.cc, filter.cc, find.cc, gammainc.cc, gcd.cc,
getgrent.cc, getpwent.cc, getrusage.cc, givens.cc, hess.cc, hex2num.cc, inv.cc,
kron.cc, lookup.cc, lsode.cc, lu.cc, luinc.cc, matrix_type.cc, max.cc,
md5sum.cc, mgorth.cc, nproc.cc, pinv.cc, quad.cc, quadcc.cc, qz.cc,
rand.cc, rcond.cc, regexp.cc, schur.cc, spparms.cc, sqrtm.cc, str2double.cc,
strfind.cc, sub2ind.cc, svd.cc, syl.cc, time.cc, tril.cc, typecast.cc:
Move functions from DLD-FUNCTIONS/ to corefcn/ directory. Include "defun.h",
not "defun-dld.h". Change docstring to refer to these as "Built-in Functions".
* build-aux/mk-opts.pl: Generate options code with '#include "defun.h"'. Change
option docstrings to refer to these as "Built-in Functions".
* corefcn/module.mk: List of functions to build in corefcn/ dir.
* DLD-FUNCTIONS/config-module.awk: Update to new build system.
* DLD-FUNCTIONS/module-files: Remove functions which are now in corefcn/ directory.
* src/Makefile.am: Update to build "convenience library" in corefcn/. Octave
program now links against all other libraries + corefcn libary.
* src/find-defun-files.sh: Strip $srcdir from filename.
* src/link-deps.mk: Add REGEX and FFTW link dependencies for liboctinterp.
* type.m, which.m: Change failing tests to use 'amd', still a dynamic function,
rather than 'dot', which isn't.
author | Rik <rik@octave.org> |
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date | Fri, 27 Jul 2012 15:35:00 -0700 |
parents | src/DLD-FUNCTIONS/hex2num.cc@60e5cf354d80 |
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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 Typecast the 16 character hexadecimal character string to an IEEE 754\n\ |
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39 double precision number. If fewer than 16 characters are given the\n\ |
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40 strings are right padded with '0' characters.\n\ |
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41 \n\ |
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42 Given a string matrix, @code{hex2num} treats each row as a separate\n\ |
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43 number.\n\ |
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44 \n\ |
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45 @example\n\ |
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46 @group\n\ |
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47 hex2num ([\"4005bf0a8b145769\"; \"4024000000000000\"])\n\ |
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48 @result{} [2.7183; 10.000]\n\ |
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49 @end group\n\ |
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50 @end example\n\ |
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51 @seealso{num2hex, hex2dec, dec2hex}\n\ |
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52 @end deftypefn") |
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53 { |
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54 int nargin = args.length (); |
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55 octave_value retval; |
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56 |
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57 if (nargin != 1) |
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58 print_usage (); |
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59 else |
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60 { |
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61 const charMatrix cmat = args(0).char_matrix_value (); |
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62 |
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63 if (cmat.columns () > 16) |
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64 error ("hex2num: S must be no more than 16 characters"); |
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65 else if (! error_state) |
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66 { |
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67 octave_idx_type nr = cmat.rows (); |
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68 octave_idx_type nc = cmat.columns (); |
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69 ColumnVector m (nr); |
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70 |
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71 for (octave_idx_type i = 0; i < nr; i++) |
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72 { |
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73 union |
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74 { |
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75 uint64_t ival; |
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76 double dval; |
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77 } num; |
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78 |
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79 num.ival = 0; |
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80 |
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81 for (octave_idx_type j = 0; j < nc; j++) |
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82 { |
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83 unsigned char ch = cmat.elem (i, j); |
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84 |
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85 if (isxdigit (ch)) |
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86 { |
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87 num.ival <<= 4; |
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88 if (ch >= 'a') |
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89 num.ival += static_cast<uint64_t> (ch - 'a' + 10); |
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90 else if (ch >= 'A') |
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91 num.ival += static_cast<uint64_t> (ch - 'A' + 10); |
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92 else |
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93 num.ival += static_cast<uint64_t> (ch - '0'); |
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94 } |
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95 else |
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96 { |
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97 error ("hex2num: illegal character found in string S"); |
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98 break; |
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99 } |
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100 } |
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101 |
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102 if (error_state) |
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103 break; |
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104 else |
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105 { |
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106 if (nc < 16) |
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107 num.ival <<= (16 - nc) * 4; |
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108 |
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109 m(i) = num.dval; |
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110 } |
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111 } |
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112 |
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113 if (! error_state) |
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114 retval = m; |
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115 } |
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116 } |
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117 |
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118 return retval; |
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119 } |
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120 |
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121 /* |
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122 %!assert (hex2num (["c00";"bff";"000";"3ff";"400"]), [-2:2]') |
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123 */ |
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124 |
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125 DEFUN (num2hex, args, , |
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126 "-*- texinfo -*-\n\ |
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127 @deftypefn {Built-in Function} {@var{s} =} num2hex (@var{n})\n\ |
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128 Typecast a double precision number or vector to a 16 character hexadecimal\n\ |
10840 | 129 string of the IEEE 754 representation of the number. For example:\n\ |
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130 \n\ |
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131 @example\n\ |
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132 @group\n\ |
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133 num2hex ([-1, 1, e, Inf, NaN, NA])\n\ |
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134 @result{} \"bff0000000000000\n\ |
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135 3ff0000000000000\n\ |
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136 4005bf0a8b145769\n\ |
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137 7ff0000000000000\n\ |
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138 fff8000000000000\n\ |
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139 7ff00000000007a2\"\n\ |
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140 @end group\n\ |
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141 @end example\n\ |
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142 @seealso{hex2num, hex2dec, dec2hex}\n\ |
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143 @end deftypefn") |
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144 { |
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145 int nargin = args.length (); |
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146 octave_value retval; |
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147 |
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148 if (nargin != 1) |
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149 print_usage (); |
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150 else |
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151 { |
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152 const ColumnVector v (args(0).vector_value ()); |
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153 |
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154 if (! error_state) |
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155 { |
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156 octave_idx_type nr = v.length (); |
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157 charMatrix m (nr, 16); |
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158 const double *pv = v.fortran_vec (); |
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159 |
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160 for (octave_idx_type i = 0; i < nr; i++) |
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161 { |
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162 union |
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163 { |
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164 uint64_t ival; |
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165 double dval; |
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166 } num; |
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167 |
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168 num.dval = *pv++; |
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169 |
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170 for (octave_idx_type j = 0; j < 16; j++) |
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171 { |
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172 unsigned char ch = |
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173 static_cast<char> (num.ival >> ((15 - j) * 4) & 0xF); |
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174 if (ch >= 10) |
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175 ch += 'a' - 10; |
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176 else |
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177 ch += '0'; |
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178 |
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179 m.elem (i, j) = ch; |
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180 } |
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181 } |
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182 |
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183 retval = m; |
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184 } |
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185 } |
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186 |
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187 return retval; |
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188 } |
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189 |
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190 /* |
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191 %!assert (num2hex (-2:2), ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"]) |
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192 */ |