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13 <pre>
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14 <a name="package-ConversionsUtil-"></a> 1 <span class="k">package </span><span class="i">ConversionsUtil</span><span class="sc">;</span>
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15 2 <span class="c">#</span>
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16 3 <span class="c"># $RCSfile: ConversionsUtil.pm,v $</span>
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17 4 <span class="c"># $Date: 2015/02/28 20:47:02 $</span>
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18 5 <span class="c"># $Revision: 1.22 $</span>
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19 6 <span class="c">#</span>
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20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span>
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21 8 <span class="c">#</span>
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22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
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23 10 <span class="c">#</span>
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24 11 <span class="c"># This file is part of MayaChemTools.</span>
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25 12 <span class="c">#</span>
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26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
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27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
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28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
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29 16 <span class="c"># later version.</span>
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30 17 <span class="c">#</span>
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31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
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32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
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33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span>
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34 21 <span class="c"># details.</span>
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35 22 <span class="c">#</span>
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36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
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37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span>
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38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
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39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
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40 27 <span class="c">#</span>
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41 28
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42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span>
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43 30 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span>
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44 31 <span class="k">use</span> <span class="w">Constants</span><span class="sc">;</span>
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45 32
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46 33 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS)</span><span class="sc">;</span>
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47 34
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48 35 <span class="i">@ISA</span> = <span class="q">qw(Exporter)</span><span class="sc">;</span>
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49 36
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50 37 <span class="c"># Groups of conversion functions...</span>
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51 38 <span class="k">my</span><span class="s">(</span><span class="i">@MathConversions</span><span class="s">)</span> = <span class="q">qw(DegreesToRadians RadiansToDegrees)</span><span class="sc">;</span>
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52 39 <span class="k">my</span><span class="s">(</span><span class="i">@NumericBaseConversions</span><span class="s">)</span> = <span class="q">qw(BinaryToDecimal DecimalToBinary HexadecimalToDecimal DecimalToHexadecimal OctalToDecimal DecimalToOctal BinaryToHexadecimal HexadecimalToBinary HexadecimalToOctal OctalToHexadecimal StringToBinary StringToHexadecimal)</span><span class="sc">;</span>
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53 40
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54 41 <span class="c"># Export all conversion functions...</span>
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55 42 <span class="i">@EXPORT</span> = <span class="s">(</span><span class="i">@MathConversions</span><span class="cm">,</span> <span class="i">@NumericBaseConversions</span><span class="s">)</span><span class="sc">;</span>
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56 43 <span class="i">@EXPORT_OK</span> = <span class="q">qw()</span><span class="sc">;</span>
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57 44
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58 45 <span class="i">%EXPORT_TAGS</span> = <span class="s">(</span>
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59 46 <span class="w">math</span> <span class="cm">=></span> <span class="s">[</span><span class="i">@MathConversions</span><span class="s">]</span><span class="cm">,</span>
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60 47 <span class="w">all</span> <span class="cm">=></span> <span class="s">[</span><span class="i">@EXPORT</span><span class="cm">,</span> <span class="i">@EXPORT_OK</span><span class="s">]</span>
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61 48 <span class="s">)</span><span class="sc">;</span>
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62 49
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63 50
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64 51 <span class="c"># Degrees to radians...</span>
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65 <a name="DegreesToRadians-"></a> 52 <span class="k">sub </span><span class="m">DegreesToRadians ($;$)</span> <span class="s">{</span>
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66 53 <span class="k">my</span><span class="s">(</span><span class="i">$Degrees</span><span class="cm">,</span> <span class="i">$IgnoreWrap</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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67 54 <span class="k">my</span><span class="s">(</span><span class="i">$Radians</span><span class="cm">,</span> <span class="i">$WrapValue</span><span class="s">)</span><span class="sc">;</span>
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68 55
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69 56 <span class="i">$WrapValue</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$IgnoreWrap</span><span class="s">)</span> && <span class="i">$IgnoreWrap</span><span class="s">)</span> ? <span class="n">0</span> <span class="co">:</span> <span class="n">1</span><span class="sc">;</span>
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70 57 <span class="k">if</span> <span class="s">(</span><span class="i">$Degrees</span> > <span class="n">360</span> && <span class="i">$WrapValue</span><span class="s">)</span> <span class="s">{</span>
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71 58 <span class="i">$Degrees</span> = <span class="i">$Degrees</span> % <span class="n">360</span><span class="sc">;</span>
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72 59 <span class="s">}</span>
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73 60 <span class="i">$Radians</span> = <span class="s">(</span><span class="i">$Degrees</span> * <span class="w">TwoPi</span><span class="s">)</span> / <span class="n">360</span><span class="sc">;</span>
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74 61
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75 62 <span class="k">return</span> <span class="i">$Radians</span><span class="sc">;</span>
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76 63 <span class="s">}</span>
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77 64
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78 65 <span class="c"># Radians to degrees...</span>
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79 <a name="RadiansToDegrees-"></a> 66 <span class="k">sub </span><span class="m">RadiansToDegrees ($;$)</span> <span class="s">{</span>
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80 67 <span class="k">my</span><span class="s">(</span><span class="i">$Radians</span><span class="cm">,</span> <span class="i">$IgnoreWrap</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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81 68 <span class="k">my</span><span class="s">(</span><span class="i">$Degrees</span><span class="cm">,</span> <span class="i">$WrapValue</span><span class="s">)</span><span class="sc">;</span>
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82 69
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83 70 <span class="i">$WrapValue</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$IgnoreWrap</span><span class="s">)</span> && <span class="i">$IgnoreWrap</span><span class="s">)</span> ? <span class="n">0</span> <span class="co">:</span> <span class="n">1</span><span class="sc">;</span>
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84 71 <span class="i">$Degrees</span> = <span class="s">(</span><span class="i">$Radians</span> * <span class="n">360</span><span class="s">)</span> / <span class="w">TwoPi</span><span class="sc">;</span>
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85 72 <span class="k">if</span> <span class="s">(</span><span class="i">$Degrees</span> > <span class="n">360</span> && <span class="i">$WrapValue</span><span class="s">)</span> <span class="s">{</span>
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86 73 <span class="i">$Degrees</span> = <span class="i">$Degrees</span> % <span class="n">360</span><span class="sc">;</span>
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87 74 <span class="s">}</span>
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88 75
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89 76 <span class="k">return</span> <span class="i">$Degrees</span><span class="sc">;</span>
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90 77 <span class="s">}</span>
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91 78
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92 79 <span class="c"># Convert a binary string to a decimal number...</span>
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93 <a name="BinaryToDecimal-"></a> 80 <span class="k">sub </span><span class="m">BinaryToDecimal ($)</span> <span class="s">{</span>
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94 81 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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95 82
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96 83 <span class="k">if</span> <span class="s">(</span><span class="i">$Value</span> !~ <span class="q">/^0b/</span><span class="s">)</span> <span class="s">{</span>
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97 84 <span class="i">$Value</span> = <span class="q">"0b${Value}"</span><span class="sc">;</span>
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98 85 <span class="s">}</span>
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99 86 <span class="k">return</span> <span class="i">_ConvertToDecimal</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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100 87 <span class="s">}</span>
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101 88
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102 89 <span class="c"># Convert a decimal number into a binary string...</span>
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103 <a name="DecimalToBinary-"></a> 90 <span class="k">sub </span><span class="m">DecimalToBinary ($)</span> <span class="s">{</span>
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104 91 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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105 92
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106 93 <span class="k">return</span> <span class="k">sprintf</span><span class="s">(</span><span class="q">"%b"</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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107 94 <span class="s">}</span>
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108 95
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109 96 <span class="c"># Convert a hexadecimal string to a decimal number...</span>
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110 <a name="HexadecimalToDecimal-"></a> 97 <span class="k">sub </span><span class="m">HexadecimalToDecimal ($)</span> <span class="s">{</span>
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111 98 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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112 99
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113 100 <span class="k">if</span> <span class="s">(</span><span class="i">$Value</span> !~ <span class="q">/^0x/</span><span class="s">)</span> <span class="s">{</span>
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114 101 <span class="i">$Value</span> = <span class="q">"0x${Value}"</span><span class="sc">;</span>
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115 102 <span class="s">}</span>
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116 103 <span class="k">return</span> <span class="i">_ConvertToDecimal</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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117 104 <span class="s">}</span>
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118 105
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119 106 <span class="c"># Convert a decimal number into a hexadecimal string...</span>
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120 <a name="DecimalToHexadecimal-"></a> 107 <span class="k">sub </span><span class="m">DecimalToHexadecimal ($)</span> <span class="s">{</span>
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121 108 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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122 109
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123 110 <span class="k">return</span> <span class="k">sprintf</span><span class="s">(</span><span class="q">"%x"</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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124 111 <span class="s">}</span>
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125 112
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126 113 <span class="c"># Convert an octal string to a decimal number...</span>
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127 <a name="OctalToDecimal-"></a> 114 <span class="k">sub </span><span class="m">OctalToDecimal ($)</span> <span class="s">{</span>
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128 115 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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129 116
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130 117 <span class="k">if</span> <span class="s">(</span><span class="i">$Value</span> !~ <span class="q">/^0/</span><span class="s">)</span> <span class="s">{</span>
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131 118 <span class="i">$Value</span> = <span class="q">"0${Value}"</span><span class="sc">;</span>
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132 119 <span class="s">}</span>
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133 120 <span class="k">return</span> <span class="i">_ConvertToDecimal</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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134 121 <span class="s">}</span>
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135 122
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136 123 <span class="c"># Convert a decimal number into an octal string...</span>
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137 <a name="DecimalToOctal-"></a> 124 <span class="k">sub </span><span class="m">DecimalToOctal ($)</span> <span class="s">{</span>
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138 125 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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139 126
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140 127 <span class="k">return</span> <span class="k">sprintf</span><span class="s">(</span><span class="q">"%o"</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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141 128 <span class="s">}</span>
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142 129
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143 130 <span class="c"># Convert string into a binary string. Going from left to right, two ways of arranging bits</span>
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144 131 <span class="c"># inside each byte are available: Most Significat Bits (MSB) first or Least Significat Bits (LSB)</span>
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145 132 <span class="c"># first. Default is MSB corresponding to descending bits order (PerlSpeak) inside each</span>
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146 133 <span class="c"># each packed byte (Most singificat bits first).</span>
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147 134 <span class="c">#</span>
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148 <a name="StringToBinary-"></a> 135 <span class="k">sub </span><span class="m">StringToBinary ($;$)</span> <span class="s">{</span>
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149 136 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="cm">,</span> <span class="i">$UseReverseBitOrder</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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150 137 <span class="k">my</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="s">)</span><span class="sc">;</span>
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151 138
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152 139 <span class="i">$BinTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'b*'</span> <span class="co">:</span> <span class="q">'B*'</span><span class="sc">;</span>
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153 140 <span class="k">return</span> <span class="k">unpack</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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154 141 <span class="s">}</span>
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155 142
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156 143 <span class="c"># Convert string into a hexadecimal string. Two ways of arranging nybbles (pair of 4 bits in each</span>
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157 144 <span class="c"># byte) are available: high nybbles first or low nybbles first. Default is MSB corresponding to high</span>
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158 145 <span class="c"># nybbles (PerlSpeak) first. Low and high nybbles correspond to pair of a low and high four bits in a byte.</span>
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159 146 <span class="c">#</span>
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160 <a name="StringToHexadecimal-"></a> 147 <span class="k">sub </span><span class="m">StringToHexadecimal ($;$)</span> <span class="s">{</span>
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161 148 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="cm">,</span> <span class="i">$UseReverseBitOrder</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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162 149 <span class="k">my</span><span class="s">(</span><span class="i">$HexTemplate</span><span class="s">)</span><span class="sc">;</span>
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163 150
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164 151 <span class="i">$HexTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'h*'</span> <span class="co">:</span> <span class="q">'H*'</span><span class="sc">;</span>
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165 152 <span class="k">return</span> <span class="k">unpack</span><span class="s">(</span><span class="i">$HexTemplate</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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166 153 <span class="s">}</span>
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167 154
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168 155 <span class="c"># Convert a binary string into a hexadecimal string...</span>
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169 156 <span class="c">#</span>
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170 <a name="BinaryToHexadecimal-"></a> 157 <span class="k">sub </span><span class="m">BinaryToHexadecimal ($;$)</span> <span class="s">{</span>
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171 158 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="cm">,</span> <span class="i">$UseReverseBitOrder</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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172 159 <span class="k">my</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="cm">,</span> <span class="i">$HexTemplate</span><span class="s">)</span><span class="sc">;</span>
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173 160
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174 161 <span class="i">$BinTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'b*'</span> <span class="co">:</span> <span class="q">'B*'</span><span class="sc">;</span>
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175 162 <span class="i">$HexTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'h*'</span> <span class="co">:</span> <span class="q">'H*'</span><span class="sc">;</span>
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176 163
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177 164 <span class="k">return</span> <span class="k">unpack</span><span class="s">(</span><span class="i">$HexTemplate</span><span class="cm">,</span> <span class="k">pack</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="s">)</span><span class="sc">;</span>
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178 165 <span class="s">}</span>
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179 166
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180 167 <span class="c"># Convert a hexadecimal string into a binary string...</span>
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181 168 <span class="c">#</span>
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182 <a name="HexadecimalToBinary-"></a> 169 <span class="k">sub </span><span class="m">HexadecimalToBinary ($;$)</span> <span class="s">{</span>
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183 170 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="cm">,</span> <span class="i">$UseReverseBitOrder</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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184 171 <span class="k">my</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="cm">,</span> <span class="i">$HexTemplate</span><span class="s">)</span><span class="sc">;</span>
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185 172
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186 173 <span class="i">$BinTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'b*'</span> <span class="co">:</span> <span class="q">'B*'</span><span class="sc">;</span>
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187 174 <span class="i">$HexTemplate</span> = <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$UseReverseBitOrder</span><span class="s">)</span> && <span class="i">$UseReverseBitOrder</span><span class="s">)</span> ? <span class="q">'h*'</span> <span class="co">:</span> <span class="q">'H*'</span><span class="sc">;</span>
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188 175
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189 176 <span class="k">return</span> <span class="k">unpack</span><span class="s">(</span><span class="i">$BinTemplate</span><span class="cm">,</span> <span class="k">pack</span><span class="s">(</span><span class="i">$HexTemplate</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="s">)</span><span class="sc">;</span>
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190 177 <span class="s">}</span>
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191 178
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192 179 <span class="c"># Convert a hexadecimal string into a octal string...</span>
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193 180 <span class="c">#</span>
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194 <a name="HexadecimalToOctal-"></a> 181 <span class="k">sub </span><span class="m">HexadecimalToOctal</span> <span class="s">{</span>
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195 182 <span class="k">my</span><span class="s">(</span><span class="i">$Hexadecimal</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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196 183
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197 184 <span class="k">return</span> <span class="i">DecimalToOctal</span><span class="s">(</span><span class="i">HexadecimalToDecimal</span><span class="s">(</span><span class="i">$Hexadecimal</span><span class="s">)</span><span class="s">)</span><span class="sc">;</span>
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198 185 <span class="s">}</span>
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199 186
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200 187 <span class="c"># Convert a octal string into a hexadecimal string...</span>
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201 188 <span class="c">#</span>
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202 <a name="OctalToHexadecimal-"></a> 189 <span class="k">sub </span><span class="m">OctalToHexadecimal</span> <span class="s">{</span>
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203 190 <span class="k">my</span><span class="s">(</span><span class="i">$Octal</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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204 191
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205 192 <span class="k">return</span> <span class="i">DecimalToHexadecimal</span><span class="s">(</span><span class="i">OctalToDecimal</span><span class="s">(</span><span class="i">$Octal</span><span class="s">)</span><span class="s">)</span><span class="sc">;</span>
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206 193 <span class="s">}</span>
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207 194
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208 195 <span class="c"># Use Perl oct function to convert binary, octal or hexadecimal strings into decimal numbers.</span>
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209 <a name="_ConvertToDecimal-"></a> 196 <span class="k">sub </span><span class="m">_ConvertToDecimal ($)</span> <span class="s">{</span>
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210 197 <span class="k">my</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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211 198
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212 199 <span class="k">return</span> <span class="s">(</span><span class="i">$Value</span> =~ <span class="q">/^0/</span><span class="s">)</span> ? <span class="k">oct</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span> <span class="co">:</span> <span class="i">$Value</span><span class="sc">;</span>
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213 200 <span class="s">}</span>
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214 201
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215 <a name="EOF-"></a></pre>
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216 <p> </p>
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217 <br />
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218 <center>
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219 <img src="../../../images/h2o2.png">
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220 </center>
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221 </body>
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222 </html>
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