       1 #!/usr/bin/perl -w
       2 #
       3 # File: InfoPeriodicTableElements.pl
       4 # Author: Manish Sud <msud@san.rr.com>
       5 #
       6 # Copyright (C) 2018 Manish Sud. All rights reserved.
       7 #
       8 # This file is part of MayaChemTools.
       9 #
      10 # MayaChemTools is free software; you can redistribute it and/or modify it under
      11 # the terms of the GNU Lesser General Public License as published by the Free
      12 # Software Foundation; either version 3 of the License, or (at your option) any
      13 # later version.
      14 #
      15 # MayaChemTools is distributed in the hope that it will be useful, but without
      16 # any warranty; without even the implied warranty of merchantability of fitness
      17 # for a particular purpose.  See the GNU Lesser General Public License for more
      18 # details.
      19 #
      20 # You should have received a copy of the GNU Lesser General Public License
      21 # along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or
      22 # write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,
      23 # Boston, MA, 02111-1307, USA.
      24 #
      25
      26 use strict;
      27 use FindBin; use lib "$FindBin::Bin/../lib";
      28 use Getopt::Long;
      29 use File::Basename;
      30 use Text::ParseWords;
      31 use Benchmark;
      32 use FileUtil;
      33 use TextUtil;
      34 use PeriodicTable;
      35
      36 my($ScriptName, %Options, $StartTime, $EndTime, $TotalTime);
      37
      38 # Autoflush STDOUT
      39 $| = 1;
      40
      41 # Starting message...
      42 $ScriptName = basename($0);
      43 print "\n$ScriptName: Starting...\n\n";
      44 $StartTime = new Benchmark;
      45
      46 # Get the options and setup script...
      47 SetupScriptUsage();
      48 if ($Options{help}) {
      49   die GetUsageFromPod("$FindBin::Bin/$ScriptName");
      50 }
      51
      52 print "Processing options...\n";
      53 my(%OptionsInfo);
      54 ProcessOptions();
      55
      56 ListElementProperties();
      57 print "\n$ScriptName:Done...\n\n";
      58
      59 $EndTime = new Benchmark;
      60 $TotalTime = timediff ($EndTime, $StartTime);
      61 print "Total time: ", timestr($TotalTime), "\n";
      62
      63 ###############################################################################
      64
      65 # List atomic properties for elements...
      66 sub ListElementProperties {
      67   my($ElementID, $ElementDataRef, $PropertyName, $PropertyValue, $PropertyUnits, $PropertyUnitsRef, @PropertyLabels, @PropertyValues);
      68
      69   print "Listing information for periodic table element(s)...\n";
      70
      71   if ($OptionsInfo{FileOutput}) {
      72     print "Generating file $OptionsInfo{OutFileName}...\n";
      73     open OUTFILE, ">$OptionsInfo{OutFileName}" or die "Couldn't open $OptionsInfo{OutFileName}: $!\n";
      74   }
      75
      76   # Setup property labels...
      77   @PropertyLabels = ();
      78   $PropertyUnitsRef = PeriodicTable::GetElementPropertiesNamesAndUnits();
      79   for $PropertyName (@{$OptionsInfo{SpecifiedProperies}}) {
      80     $PropertyUnits = (exists $PropertyUnitsRef->{$PropertyName}) ? $PropertyUnitsRef->{$PropertyName} : '';
      81     if ($PropertyName =~ /^NaturalIsotopeData$/i) {
      82       push @PropertyLabels, qw(MassNumber: RelativeAtomicMass: NaturalAbundance:);
      83     }
      84     else {
      85       push @PropertyLabels, ($PropertyUnits ? "$PropertyName ($PropertyUnits):" : "$PropertyName:");
      86     }
      87   }
      88
      89   if ($OptionsInfo{ElementRowsOutput}) {
      90     ListHeaderRowData(\@PropertyLabels);
      91   }
      92
      93   # Go over specified properties...
      94   for $ElementID (@{$OptionsInfo{SpecifiedElementIDs}}) {
      95     $ElementDataRef = PeriodicTable::GetElementPropertiesData($ElementID);
      96
      97     if (!$OptionsInfo{ElementRowsOutput}) {
      98       if ($OptionsInfo{FileOutput}) {
      99         print OUTFILE "\nListing atomic properties for element $ElementID...\n\n";
     100       }
     101       else {
     102         print "\nListing atomic properties for element $ElementID...\n\n";
     103       }
     104     }
     105
     106     # Collect data..
     107     @PropertyValues = ();
     108     for $PropertyName (@{$OptionsInfo{SpecifiedProperies}}) {
     109       if ($PropertyName =~ /^NaturalIsotopeData$/i) {
     110         push @PropertyValues, SetupIsotopeData($ElementID);
     111       }
     112       else {
     113         $PropertyValue = $ElementDataRef->{$PropertyName};
     114         if (IsFloat($PropertyValue)) {
     115           $PropertyValue = sprintf("%.$OptionsInfo{Precision}f", $PropertyValue) + 0;
     116         }
     117         push @PropertyValues, $PropertyValue;
     118       }
     119     }
     120     # List data...
     121     ListElementData(\@PropertyLabels, \@PropertyValues);
     122   }
     123   if ($OptionsInfo{FileOutput}) {
     124     close OUTFILE;
     125   }
     126   print "\n";
     127 }
     128
     129 # List data for an element...
     130 sub ListElementData {
     131   my($DataLabelRef, $DataValueRef) = @_;
     132   my($Index, $Line, $Value);
     133
     134   if ($OptionsInfo{ElementRowsOutput}) {
     135     $Line = '';
     136     # Format data...
     137     if ($OptionsInfo{OutQuote} || $Options{outdelim} !~ /^comma$/i) {
     138       $Line = JoinWords($DataValueRef, $OptionsInfo{OutDelim}, $OptionsInfo{OutQuote});
     139     }
     140     else {
     141       # Always quote values containing commas...
     142       $Line = ($DataValueRef->[0] =~ /\,/) ? qq("$DataValueRef->[0]") : $DataValueRef->[0];
     143       for $Index (1 .. $#{$DataValueRef} ) {
     144         $Value = $DataValueRef->[$Index];
     145         if ($Value =~ /\,/) {
     146           $Value = qq("$Value");
     147         }
     148         $Line .= $OptionsInfo{OutDelim} . $Value;
     149       }
     150     }
     151     if ($OptionsInfo{FileOutput}) {
     152       print OUTFILE "$Line\n";
     153     }
     154     else {
     155       print "$Line\n";
     156     }
     157   }
     158   else {
     159     # Format and list data...
     160     $Line = '';
     161     for $Index (0 .. $#{$DataLabelRef} ) {
     162       $Line = $DataLabelRef->[$Index] . ' ' . $DataValueRef->[$Index];
     163       if ($OptionsInfo{FileOutput}) {
     164         print OUTFILE "$Line\n";
     165       }
     166       else {
     167         print "$Line\n";
     168       }
     169     }
     170   }
     171 }
     172
     173 # List data for an element...
     174 sub ListHeaderRowData {
     175   my($DataLabelRef) = @_;
     176   my($Line);
     177
     178   # Format data...
     179   $Line = JoinWords($DataLabelRef, $OptionsInfo{OutDelim}, $OptionsInfo{OutQuote});
     180   $Line =~ s/\://g;
     181   # List data...
     182   if ($OptionsInfo{FileOutput}) {
     183     print OUTFILE "$Line\n";
     184   }
     185   else {
     186     print "$Line\n";
     187   }
     188 }
     189
     190 # Setup isotope data strings...
     191 sub SetupIsotopeData {
     192   my($ElementID) = @_;
     193   my($MassNumber, $RelativeAtomicMass, $NaturalAbundance, $NaturalIsotopeDataRef, @MassNumbers, @RelativeAtomicMasses, @NaturalAbundances);
     194
     195   # Get natural isotope data: MassNumber, RelativeAtomicMass and NaturalAbundance
     196   @MassNumbers = (); @RelativeAtomicMasses = (); @NaturalAbundances = ();
     197   $NaturalIsotopeDataRef = PeriodicTable::GetElementNaturalIsotopesData($ElementID);
     198   for $MassNumber (sort {$a <=> $b} keys %{$NaturalIsotopeDataRef}) {
     199     $RelativeAtomicMass = $NaturalIsotopeDataRef->{$MassNumber}{RelativeAtomicMass};
     200     $NaturalAbundance = $NaturalIsotopeDataRef->{$MassNumber}{NaturalAbundance};
     201     push @MassNumbers, $MassNumber;
     202     $RelativeAtomicMass = ($RelativeAtomicMass > 0) ? (sprintf("%.$OptionsInfo{Precision}f", $RelativeAtomicMass) + 0) : '';
     203     push @RelativeAtomicMasses, $RelativeAtomicMass;
     204     $NaturalAbundance = ($NaturalAbundance > 0) ? (sprintf("%.$OptionsInfo{Precision}f", $NaturalAbundance) + 0) : '';
     205     push @NaturalAbundances, $NaturalAbundance;
     206   }
     207   $MassNumber = JoinWords(\@MassNumbers, ",", 0);
     208   $RelativeAtomicMass = JoinWords(\@RelativeAtomicMasses, ",", 0);
     209   $NaturalAbundance = JoinWords(\@NaturalAbundances, ",", 0);
     210   return ($MassNumber, $RelativeAtomicMass, $NaturalAbundance);
     211 }
     212
     213 # Get propery names from categories...
     214 sub GetPropertyNamesFromCategories {
     215   my($CategoryName) = @_;
     216   my(@PropertyNames);
     217
     218   @PropertyNames = ();
     219   if ($CategoryName =~ /^Basic$/i) {
     220     @PropertyNames = ('AtomicNumber', 'ElementSymbol', 'ElementName', 'AtomicWeight', 'GroundStateConfiguration', 'GroupNumber', 'PeriodNumber', 'FirstIonizationEnergy');
     221   } elsif ($CategoryName =~ /^BasicAndNaturalIsotope$/i) {
     222     # Natural isotope data includes: 'MassNumber', 'RelativeAtomicMass', 'NaturalAbundance'
     223     @PropertyNames = ('AtomicNumber', 'ElementSymbol', 'ElementName', 'AtomicWeight', 'GroundStateConfiguration', 'GroupNumber', 'PeriodNumber', 'FirstIonizationEnergy', 'NaturalIsotopeData');
     224   } elsif ($CategoryName =~ /^NaturalIsotope$/i) {
     225     @PropertyNames = ('AtomicNumber', 'ElementSymbol', 'ElementName', 'NaturalIsotopeData');
     226   }
     227
     228   return @PropertyNames;
     229 }
     230
     231 # Process option values...
     232 sub ProcessOptions {
     233   %OptionsInfo = ();
     234
     235   $OptionsInfo{Mode} = $Options{mode};
     236
     237   $OptionsInfo{OutDelim} = ($Options{outdelim} =~ /^tab$/i ) ? "\t" : (($Options{outdelim} =~ /^semicolon$/i) ? "\;" : "\,");
     238   $OptionsInfo{OutQuote} = ($Options{quote} =~ /^yes$/i) ? 1 : 0;
     239
     240   $OptionsInfo{Overwrite} = defined $Options{overwrite} ? $Options{overwrite} : undef;
     241   $OptionsInfo{OutFileRoot} = defined $Options{root} ? $Options{root} : undef;
     242
     243   $OptionsInfo{Output} = $Options{output};
     244   $OptionsInfo{OutputStyle} = $Options{outputstyle};
     245
     246   $OptionsInfo{ElementRowsOutput} = ($Options{outputstyle} =~ /^ElementRows$/i) ? 1 : 0;
     247   $OptionsInfo{FileOutput} = ($Options{output} =~ /^File$/i) ? 1 : 0;
     248
     249   $OptionsInfo{Precision} = $Options{precision};
     250
     251   my($ElementID, @ElementIDs, @GroupElements, @PeriodElements, %GroupNamesMap);
     252
     253   @{$OptionsInfo{SpecifiedElementIDs}} = ();
     254   if (@ARGV >=1 && ($Options{mode} =~ /^All$/i) ) {
     255     warn "Warning: Ignoring comman line element IDs: Not valid for All value of \"-m --mode\" option...\n";
     256   }
     257
     258   # Set up element IDs except for All mode...
     259   @ElementIDs = ();
     260   %GroupNamesMap = ();
     261
     262   if (@ARGV >=1 ) {
     263     if ($Options{mode} !~ /^All$/i) {
     264       push @ElementIDs, @ARGV;
     265     }
     266   }
     267   else {
     268     # Setup mode specified default values...
     269     my($Nothing);
     270     MODE: {
     271         if ($Options{mode} =~ /^ElementID$/i) { push @ElementIDs, 'H'; last MODE; };
     272         if ($Options{mode} =~ /^AmericanGroupLabel$/i) { push @ElementIDs, 'IA'; last MODE; };
     273         if ($Options{mode} =~ /^EuropeanGroupLabel$/i) { push @ElementIDs, 'IA'; last MODE; };
     274         if ($Options{mode} =~ /^GroupNumber$/i) { push @ElementIDs, '1'; last MODE; };
     275         if ($Options{mode} =~ /^GroupName$/i) { push @ElementIDs, 'AlkaliMetals'; last MODE; };
     276         if ($Options{mode} =~ /^PeriodNumber$/i) { push @ElementIDs, '1'; last MODE; };
     277         $Nothing = 1;
     278       }
     279   }
     280   if ($Options{mode} =~ /^GroupName$/i) {
     281     # Map group names to what's stored in Perioidic table data file...
     282     %GroupNamesMap = ('alkalimetals', 'Alkali metal', 'alkalineearthmetals', 'Alkaline earth metal', 'chalcogens', 'Chalcogen', 'coinagemetals', 'Coinage metal', 'halogens', 'Halogen', 'noblegases', 'Noble gas', 'pnictogens', 'Pnictogen', 'lanthanides', 'Lanthanoid', 'lanthanoids', 'Lanthanoid', 'actinides', 'Actinoid', 'actinoids', 'Actinoid' );
     283   }
     284
     285   # Generate list of elements...
     286   if ($Options{mode} =~ /^All$/i) {
     287     push @{$OptionsInfo{SpecifiedElementIDs}}, PeriodicTable::GetElements();
     288   }
     289   else {
     290     ELEMENTID: for $ElementID (@ElementIDs) {
     291       if ($Options{mode} =~ /^ElementID$/i) {
     292         if (PeriodicTable::IsElement($ElementID)) {
     293           push @{$OptionsInfo{SpecifiedElementIDs}}, $ElementID;
     294         }
     295         else {
     296           warn "Ignoring element ID, $ElementID, specified using command line parameter: Unknown element ID...\n";
     297           next ELEMENTID;
     298         }
     299       }
     300       elsif ($Options{mode} =~ /^AmericanGroupLabel$/i) {
     301         if (@GroupElements = PeriodicTable::GetElementsByAmericanStyleGroupLabel($ElementID)) {
     302           push @{$OptionsInfo{SpecifiedElementIDs}}, @GroupElements;
     303         }
     304         else {
     305           warn "Ignoring American style group label, $ElementID, specified using command line parameter: Unknown group label...\n";
     306           next ELEMENTID;
     307         }
     308       }
     309       elsif ($Options{mode} =~ /^EuropeanGroupLabel$/i) {
     310         if (@GroupElements = PeriodicTable::GetElementsByEuropeanStyleGroupLabel($ElementID)) {
     311           push @{$OptionsInfo{SpecifiedElementIDs}}, @GroupElements;
     312         }
     313         else {
     314           warn "Ignoring American style group label, $ElementID, specified using command line parameter: Unknown group label...\n";
     315           next ELEMENTID;
     316         }
     317       }
     318       elsif ($Options{mode} =~ /^GroupNumber$/i) {
     319         if (@GroupElements = PeriodicTable::GetElementsByGroupNumber($ElementID)) {
     320           push @{$OptionsInfo{SpecifiedElementIDs}}, @GroupElements;
     321         }
     322         else {
     323           warn "Ignoring group number, $ElementID, specified using command line parameter: Unknown group number...\n";
     324           next ELEMENTID;
     325         }
     326       }
     327       elsif ($Options{mode} =~ /^GroupName$/i) {
     328         if (exists $GroupNamesMap{lc($ElementID)}) {
     329           @GroupElements = PeriodicTable::GetElementsByGroupName($GroupNamesMap{lc($ElementID)});
     330           push @{$OptionsInfo{SpecifiedElementIDs}}, @GroupElements;
     331         }
     332         else {
     333           warn "Ignoring group name, $ElementID, specified using command line parameter: Unknown group name...\n";
     334           next ELEMENTID;
     335         }
     336       }
     337       elsif ($Options{mode} =~ /^PeriodNumber$/i) {
     338         if (@GroupElements = PeriodicTable::GetElementsByPeriodNumber($ElementID)) {
     339           push @{$OptionsInfo{SpecifiedElementIDs}}, @GroupElements;
     340         }
     341         else {
     342           warn "Ignoring period number, $ElementID, specified using command line parameter: Unknown period number...\n";
     343           next ELEMENTID;
     344         }
     345       }
     346     }
     347   }
     348   SetupSpecifiedProperties();
     349
     350   # Setup output file name...
     351   $OptionsInfo{OutFileName} = '';
     352   if ($OptionsInfo{FileOutput}) {
     353     my($OutFileRoot, $OutFileExt);
     354
     355     $OutFileRoot = '';
     356     $OutFileExt = "csv";
     357     if ($Options{outdelim} =~ /^tab$/i) {
     358       $OutFileExt = "tsv";
     359     }
     360     if ($Options{root}) {
     361       my ($RootFileDir, $RootFileName, $RootFileExt) = ParseFileName($Options{root});
     362       if ($RootFileName && $RootFileExt) {
     363         $OutFileRoot = $RootFileName;
     364       }
     365       else {
     366         $OutFileRoot = $Options{root};
     367       }
     368     }
     369     else {
     370       $OutFileRoot = 'PeriodicTableElementsInfo' . $Options{mode};
     371     }
     372     $OptionsInfo{OutFileName} = $OutFileRoot . '.' . $OutFileExt;
     373     if (!$Options{overwrite}) {
     374       if (-e $OptionsInfo{OutFileName}) {
     375         die "Error: Output file, $OptionsInfo{OutFileName}, already exists.\nUse \-o --overwrite\ option or specify a different name using \"-r --root\" option.\n";
     376       }
     377     }
     378   }
     379 }
     380
     381 # Setup properties to list...
     382 sub SetupSpecifiedProperties {
     383   $OptionsInfo{Properties} = defined $Options{properties} ? $Options{properties} : undef;
     384
     385   $OptionsInfo{PropertiesMode} = $Options{propertiesmode};
     386   $OptionsInfo{PropertiesListing} = $Options{propertieslisting};
     387
     388   # Make sure atomic appropriate properties/category names are specified...
     389   @{$OptionsInfo{SpecifiedProperies}} = ();
     390   if ($Options{properties} && ($Options{propertiesmode} =~ /^All$/i) ) {
     391     warn "Warning: Ignoring values specifed by \"-p --properties\" option: Not valid for All value of \"--propertiesmode\" option...\n";
     392   }
     393   if ($Options{propertiesmode} =~ /^All$/i) {
     394     if ($Options{propertieslisting} =~ /^Alphabetical$/i) {
     395       push @{$OptionsInfo{SpecifiedProperies}}, PeriodicTable::GetElementPropertiesNames('Alphabetical');
     396     }
     397     else {
     398       push @{$OptionsInfo{SpecifiedProperies}}, PeriodicTable::GetElementPropertiesNames();
     399     }
     400     push @{$OptionsInfo{SpecifiedProperies}}, 'NaturalIsotopeData';
     401   }
     402   else {
     403     if ($Options{properties}) {
     404       if ($Options{propertiesmode} =~ /^Categories$/i) {
     405         # Check category name...
     406         if ($Options{properties} !~ /^(Basic|BasicAndNaturalIsotope|NaturalIsotope)$/i) {
     407           die "Error: The value specified, $Options{properties}, for option \"-p --properties\" in conjunction with \"Categories\" value for option \"--propertiesmode\" is not valid. Allowed values: Basic, BasicAndNaturalIsotope, NaturalIsotope\n";
     408         }
     409         # Set propertynames...
     410         push @{$OptionsInfo{SpecifiedProperies}}, GetPropertyNamesFromCategories($Options{properties});
     411       }
     412       else {
     413         # Check property names..
     414         my($Name, $PropertyName, @Names);
     415         @Names = split /\,/, $Options{properties};
     416         NAME: for $Name (@Names) {
     417           $PropertyName = RemoveLeadingAndTrailingWhiteSpaces($Name);
     418           if ($PropertyName =~ /^NaturalIsotopeData$/i) {
     419             push @{$OptionsInfo{SpecifiedProperies}}, $PropertyName;
     420             next NAME;
     421           }
     422           if (PeriodicTable::IsElementProperty($PropertyName)) {
     423             push @{$OptionsInfo{SpecifiedProperies}}, $PropertyName;
     424           }
     425           else {
     426             warn "Warning: Ignoring value, $Name, specifed by \"-p --properties\" option: Unknown property name...\n";
     427           }
     428         }
     429         if ($Options{propertieslisting} =~ /^Alphabetical$/i) {
     430           # AtomicNumber, ElementSymbol and ElementName are always listed first and
     431           # NaturalIsotopeData in the end...
     432           my($AtomicNumberPresent, $ElementSymbolPresent, $ElementNamePresent, $NaturalIsotopeDataPresent, @AlphabeticalProperties, %PropertiesMap);
     433           %PropertiesMap = ();
     434           @AlphabeticalProperties = ();
     435           $AtomicNumberPresent = 0; $ElementSymbolPresent = 0; $ElementNamePresent = 0; $NaturalIsotopeDataPresent = 0;
     436           NAME: for $Name (@{$OptionsInfo{SpecifiedProperies}}) {
     437             if ($Name =~ /^AtomicNumber$/i) {
     438               $AtomicNumberPresent = 1;
     439               next NAME;
     440             }
     441             if ($Name =~ /^ElementSymbol$/i) {
     442               $ElementSymbolPresent = 1;
     443               next NAME;
     444             }
     445             if ($Name =~ /^ElementName$/i) {
     446               $ElementNamePresent = 1;
     447               next NAME;
     448             }
     449             if ($Name =~ /^NaturalIsotopeData$/i) {
     450               $NaturalIsotopeDataPresent = 1;
     451               next NAME;
     452             }
     453             $PropertiesMap{$Name} = $Name;
     454           }
     455           # Setup the alphabetical list...
     456           if ($AtomicNumberPresent) {
     457             push @AlphabeticalProperties, 'AtomicNumber';
     458           }
     459           if ($ElementSymbolPresent) {
     460             push @AlphabeticalProperties, 'ElementSymbol';
     461           }
     462           if ($ElementNamePresent) {
     463             push @AlphabeticalProperties, 'ElementName';
     464           }
     465           for $Name (sort keys %PropertiesMap) {
     466             push @AlphabeticalProperties, $Name;
     467           }
     468           if ($NaturalIsotopeDataPresent) {
     469             push @AlphabeticalProperties, 'NaturalIsotopeData';
     470           }
     471           @{$OptionsInfo{SpecifiedProperies}} = ();
     472           push @{$OptionsInfo{SpecifiedProperies}}, @AlphabeticalProperties;
     473         }
     474       }
     475     }
     476     else {
     477       # Set default value...
     478       push @{$OptionsInfo{SpecifiedProperies}}, GetPropertyNamesFromCategories('Basic');
     479     }
     480   }
     481 }
     482
     483 # Setup script usage  and retrieve command line arguments specified using various options...
     484 sub SetupScriptUsage {
     485
     486   # Retrieve all the options...
     487   %Options = ();
     488   $Options{mode} = "ElementID";
     489   $Options{outdelim} = "comma";
     490   $Options{output} = "STDOUT";
     491   $Options{outputstyle} = "ElementBlock";
     492   $Options{precision} = 4;
     493   $Options{propertiesmode} = "Categories";
     494   $Options{propertieslisting} = "ByGroup";
     495   $Options{quote} = "yes";
     496
     497   if (!GetOptions(\%Options, "help|h", "mode|m=s", "outdelim=s", "output=s", "outputstyle=s", "overwrite|o", "precision=i", "properties|p=s", "propertieslisting=s", "propertiesmode=s", "quote|q=s", "root|r=s", "workingdir|w=s")) {
     498     die "\nTo get a list of valid options and their values, use \"$ScriptName -h\" or\n\"perl -S $ScriptName -h\" command and try again...\n";
     499   }
     500   if ($Options{workingdir}) {
     501     if (! -d $Options{workingdir}) {
     502       die "Error: The value specified, $Options{workingdir}, for option \"-w --workingdir\" is not a directory name.\n";
     503     }
     504     chdir $Options{workingdir} or die "Error: Couldn't chdir $Options{workingdir}: $! \n";
     505   }
     506   if ($Options{mode} !~ /^(ElementID|AmericanGroupLabel|EuropeanGroupLabel|GroupNumber|GroupName|PeriodNumber|All)$/i) {
     507     die "Error: The value specified, $Options{mode}, for option \"-m --mode\" is not valid. Allowed values: ElementID, AmericanGroupLabel, EuropeanGroupLabel, GroupNumber, GroupName, PeriodNumber, or All\n";
     508   }
     509   if ($Options{outdelim} !~ /^(comma|semicolon|tab)$/i) {
     510     die "Error: The value specified, $Options{outdelim}, for option \"--outdelim\" is not valid. Allowed values: comma, tab, or semicolon\n";
     511   }
     512   if ($Options{output} !~ /^(STDOUT|File)$/i) {
     513     die "Error: The value specified, $Options{output}, for option \"--output\" is not valid. Allowed values: STDOUT or File\n";
     514   }
     515   if ($Options{outputstyle} !~ /^(ElementBlock|ElementRows)$/i) {
     516     die "Error: The value specified, $Options{outputstyle}, for option \"--outputstyle\" is not valid. Allowed values: ElementBlock or ElementRows\n";
     517   }
     518   if (!IsPositiveInteger($Options{precision})) {
     519     die "Error: The value specified, $Options{precision}, for option \"-p --precision\" is not valid. Allowed values: > 0 \n";
     520   }
     521   if ($Options{propertiesmode} !~ /^(Categories|Names|All)$/i) {
     522     die "Error: The value specified, $Options{propertiesmode}, for option \"--propertiesmode\" is not valid. Allowed values: Categories, Names, or All\n";
     523   }
     524   if ($Options{propertieslisting} !~ /^(ByGroup|Alphabetical)$/i) {
     525     die "Error: The value specified, $Options{propertieslisting}, for option \"--propertieslisting\" is not valid. Allowed values: ByGroup, or Alphabetical\n";
     526   }
     527   if ($Options{quote} !~ /^(yes|no)$/i) {
     528     die "Error: The value specified, $Options{quote}, for option \"-q --quote\" is not valid. Allowed values: yes or no\n";
     529   }
     530 }
     531