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