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stmt |
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cond |
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pod |
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code |
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package Set::Formula; |
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44114
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use 5.8.8; |
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2
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110
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use strict; |
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84
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10
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use warnings; |
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152
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6
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7
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT = qw(formula_checker formula_calcul equality_checker); |
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use Carp qw(cluck); |
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4428
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our $VERSION = '0.05'; |
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my $debug = 0; |
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my %operators = ( |
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'+' => \&_union |
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,'-' => \&_complement |
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,'^' => \&_intersection |
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); |
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my $counter = 0; |
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#------------------------------------------# |
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sub _union |
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{ |
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2
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my ($hrefA, $hrefB, $href_result) = @_; |
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2
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14
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%{$href_result} = (); # reset this hash |
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27
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2
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for (keys %{$hrefA}) { ${$href_result}{$_} = 0 } |
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9
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8
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14
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29
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2
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5
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for (keys %{$hrefB}) { ${$href_result}{$_} = 0 } |
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} |
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#------------------------------------------# |
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sub _complement |
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{ # Result := A - B |
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2
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2
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my ($hrefA, $hrefB, $href_result) = @_; |
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2
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%{$href_result} = (); # reset this hash |
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9
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36
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37
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2
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for (keys %{$hrefA}) |
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2
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6
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38
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4
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100
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{ unless (exists ${$hrefB}{$_}) { ${$href_result}{$_} = 0 } } |
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14
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2
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3
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2
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8
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39
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} |
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#------------------------------------------# |
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sub _intersection |
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{ |
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4
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4
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9
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my ($hrefA, $hrefB, $href_result) = @_; |
44
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4
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4
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%{$href_result} = (); # reset this hash |
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4
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9
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45
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46
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4
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5
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for (keys %{$hrefB}) |
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4
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13
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47
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18
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100
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20
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{ if (exists ${$hrefA}{$_}) { ${$href_result}{$_} = 0; } } |
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18
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50
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8
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9
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8
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22
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48
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} |
49
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#------------------------------------------# |
50
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sub equality_checker # returns 1 if equal, else 0 |
51
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{ |
52
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2
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2
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1
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3
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my ($hrefA, $hrefB, $debug) = @_; |
53
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54
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2
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50
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6
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$debug = (defined $debug)? 1:0; |
55
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2
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50
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6
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if ($debug) |
56
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{ |
57
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0
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0
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printf "*** %s: running in debug mode ***\n", (caller(0))[3]; |
58
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0
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0
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print "DEBUG: 1st operand: "; for (sort keys %{$hrefA}) { print "$_ "; }; print "\n"; |
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0
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0
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0
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0
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0
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0
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0
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0
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59
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0
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0
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print "DEBUG: 2nd operand: "; for (sort keys %{$hrefB}) { print "$_ "; }; print "\n"; |
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0
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0
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0
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0
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0
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0
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0
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0
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60
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} |
61
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62
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2
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3
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for (keys %{$hrefA}) |
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2
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7
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63
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4
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100
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5
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{ unless (exists ${$hrefB}{$_}) { return 0 } } |
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4
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12
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1
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5
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64
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65
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1
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2
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for (keys %{$hrefB}) |
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1
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4
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66
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3
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50
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3
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{ unless (exists ${$hrefA}{$_}) { return 0 } } |
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3
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10
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0
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0
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67
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1
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4
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return 1; |
68
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} |
69
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#------------------------------------------# |
70
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71
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sub formula_checker # returns true on success and undefined value on error |
72
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{ |
73
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14
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14
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1
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42
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my $formula = shift; |
74
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14
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23
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my $remainder; |
75
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14
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50
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33
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55
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my $debug = (defined $ARGV[0]) && $ARGV[0] ?1:0; |
76
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14
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50
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32
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$debug && printf "*** %s: running in debug mode ***\n", (caller(0))[3]; |
77
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14
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50
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37
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unless (defined $remainder) { $remainder = ''; } |
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14
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23
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78
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14
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19
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my $parentheses_cnt = 0; |
79
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14
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19
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my $parentheses_number_cnt = 0; |
80
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14
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20
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my $operator; |
81
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my $regexpr ; |
82
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83
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# ---- check "interlacing": start ---- |
84
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# rule 1: 2 operands can't be adjacent |
85
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# rule 2: 2 operators can't be adjacent |
86
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# rule 3: operator can be neither first not last formula element |
87
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88
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14
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50
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30
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$debug && print "DEBUG 10: formula: $formula\n"; |
89
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14
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17
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$remainder = $formula; |
90
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14
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71
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$remainder =~ s/[()]//g; # remove all parentheses |
91
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14
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50
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32
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$debug && print "DEBUG 20: remainder: $remainder\n"; |
92
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14
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22
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my $operator_found = 0; |
93
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94
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INTERLACING: |
95
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14
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16
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while(1) |
96
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{ |
97
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34
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100
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149
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unless ( $remainder =~ /^\s*(\w+)\s*/ ) |
98
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{ |
99
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2
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50
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6
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$debug && cluck "ERROR: remainder of formula $remainder must begin with operand"; |
100
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2
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10
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return; |
101
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} |
102
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103
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32
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72
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$remainder = $'; |
104
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32
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50
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64
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$debug && print "DEBUG 30: operand: $1 remainder: $remainder\n"; |
105
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106
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32
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100
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65
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unless ($remainder) { last INTERLACING; } # interlacing is correct |
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9
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203
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107
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108
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23
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26
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$operator_found = 0; |
109
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23
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66
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for (keys %operators) |
110
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{ |
111
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57
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50
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121
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$debug && print "DEBUG 40: operator: $_\n"; |
112
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57
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96
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$regexpr = qq (^\\s*(\\$_)\\s*); |
113
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57
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50
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103
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$debug && printf "DEBUG 45: regexpr = %s\n", $regexpr; |
114
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57
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100
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1164
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if ( $remainder =~ /$regexpr/ ) |
115
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{ |
116
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22
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31
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$operator_found = 1; |
117
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22
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32
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$operator = $_; |
118
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22
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42
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$remainder = $'; |
119
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22
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49
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last; |
120
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} |
121
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} |
122
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123
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23
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100
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72
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unless ($operator_found) |
124
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{ |
125
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1
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50
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3
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$debug && cluck "ERROR: remainder of formula $remainder must begin with operator"; |
126
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1
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6
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return; |
127
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} |
128
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129
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22
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50
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44
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$debug && printf "DEBUG 50: operator: %s\n", $operator; |
130
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131
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22
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100
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52
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unless ($remainder) |
132
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{ |
133
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2
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50
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8
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$debug && cluck "ERROR: formula must begin with operator"; |
134
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2
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570
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return; |
135
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} |
136
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} # end of 'while (1)' |
137
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138
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# ---- check "interlacing": finish ---- |
139
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140
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# ---- check parentheses: start ---- |
141
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9
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13
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$remainder = $formula; |
142
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9
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50
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19
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$debug && printf "DEBUG 60: *** remainder = %s\n", $remainder; |
143
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144
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9
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26
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for $operator (keys %operators) |
145
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{ |
146
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27
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62
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$regexpr = qq (\\(\\s*\\$operator|\\$operator\\s*\\)); |
147
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27
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50
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47
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$debug && printf "DEBUG 65: *** operator = %-3s regexpr = %s\n", $operator, $regexpr; |
148
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27
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100
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699
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if ( $remainder =~ /$regexpr/ ) |
149
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{ |
150
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2
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50
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6
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$debug && cluck "ERROR: $& has no sense"; |
151
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2
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537
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return; |
152
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} |
153
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} |
154
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155
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7
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29
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while ($remainder =~ /[()]/) |
156
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{ |
157
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26
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50
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52
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$debug && printf "DEBUG 70: *** remainder = %s\n", $remainder; |
158
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26
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28
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$parentheses_number_cnt ++; |
159
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26
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49
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$remainder = $'; |
160
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26
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50
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56
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unless (defined $remainder) { $remainder = ''; } |
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0
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0
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161
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26
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50
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81
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$debug && printf "DEBUG 75: *** remainder = %s\n", $remainder; |
162
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26
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100
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69
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if ( $& =~ /\(/ ) { $parentheses_cnt ++; } |
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13
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47
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163
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else |
164
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{ |
165
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13
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15
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$parentheses_cnt --; |
166
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13
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100
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57
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if ($parentheses_cnt < 0) |
167
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{ |
168
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2
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50
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5
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$debug && cluck "ERROR: negative parentheses amount at parentheses nr.$parentheses_number_cnt from left"; |
169
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2
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15
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return; |
170
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} |
171
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} |
172
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} # end of "while ($remainder)" |
173
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174
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5
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100
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14
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if ($parentheses_cnt) |
175
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{ |
176
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2
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50
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5
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$debug && cluck "ERROR: more opening parentheses than closing parentheses"; |
177
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2
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13
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return; |
178
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} |
179
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3
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21
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return 1; |
180
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} # end of "sub formula_checker" |
181
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#------------------------------------------# |
182
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#------------------------------------------# |
183
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184
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sub formula_calcul |
185
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{ |
186
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12
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12
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1
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1348
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my ($curr_formula, $href_result, $href_HoH_sets, $debug) = @_; |
187
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12
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15
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%{$href_result} = (); # reset this hash |
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12
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24
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188
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12
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50
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29
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unless (defined $curr_formula) { $curr_formula = '' } |
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0
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0
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189
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190
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12
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50
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66
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50
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$debug = (defined $debug) && $debug ?1:0; |
191
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12
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50
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24
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$debug && printf "*** %s: running in debug mode ***\n", (caller(0))[3]; |
192
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193
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12
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50
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21
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$debug && print "\n--------------------------\n#1 curr_formula = $curr_formula\n"; |
194
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|
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195
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12
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16
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my $href_operand_left; |
196
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|
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my $href_operand_right; |
197
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0
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0
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my $operator; # a key of %operators |
198
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0
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0
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my $href_remainder; |
199
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0
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|
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0
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my $new_name; |
200
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201
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|
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# parse formula: search internal (...) |
202
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12
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48
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while ( $curr_formula =~ /\(([^(]+?)\)/ ) |
203
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|
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{ |
204
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# $curr_formula contains parentheses |
205
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# $1 is innenmost formula part, that does not contains parentheses. |
206
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# Opened and closed parentheses are located on boundaries of $1 and don't belong it. |
207
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6
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50
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13
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$debug && print "#2 in parentheses: $1\n"; |
208
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|
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#------------------------------------------# |
209
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6
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100
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35
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unless (defined &formula_calcul ($1, $href_result, $href_HoH_sets, $debug)) |
210
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2
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50
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5
|
{ $debug && cluck "Error in formula \"$1\""; return; } |
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2
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70
|
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211
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212
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4
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9
|
$new_name = "InTeRmEdIaTe$counter"; |
213
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4
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6
|
$counter++; |
214
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4
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5
|
for (keys %{$href_result}) { $href_HoH_sets->{$new_name}{$_} = 0; } |
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4
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13
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16
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38
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215
|
4
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50
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13
|
unless (exists $href_HoH_sets->{$new_name}) { $href_HoH_sets->{$new_name} = () } |
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0
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|
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|
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0
|
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216
|
4
|
|
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|
|
5
|
%{$href_result} = (); # reset this hash |
|
4
|
|
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|
|
9
|
|
217
|
|
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218
|
4
|
|
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|
17
|
$curr_formula = "$` $new_name $'"; |
219
|
4
|
50
|
|
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22
|
$debug && print "#3 curr_formula = $curr_formula\n\n"; |
220
|
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|
|
} |
221
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222
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|
# parenthesesless formula. |
223
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|
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|
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|
|
# Calculate all operators with equal priority from left to right |
224
|
10
|
50
|
|
|
|
43
|
if ( $curr_formula =~ /(\w+)\s*(\S+)\s*(\w+)/ ) |
225
|
|
|
|
|
|
|
{ |
226
|
10
|
|
|
|
|
26
|
$href_operand_left = $1; |
227
|
10
|
|
|
|
|
16
|
$operator = $2; |
228
|
10
|
|
|
|
|
17
|
$href_operand_right = $3; |
229
|
10
|
|
|
|
|
17
|
$href_remainder = $'; |
230
|
10
|
50
|
|
|
|
36
|
if ($operator !~ /^(\+|\-|\^)$/) |
231
|
0
|
0
|
|
|
|
0
|
{ $debug && cluck "ERROR: Unknown operator \"$operator\" in formula \"$curr_formula\"\n"; return; } |
|
0
|
|
|
|
|
0
|
|
232
|
|
|
|
|
|
|
|
233
|
10
|
50
|
|
|
|
24
|
$debug && printf "*** left operand = $href_operand_left, operator = $operator, right operand = $href_operand_right, remainder = %s\n", $href_remainder; |
234
|
|
|
|
|
|
|
|
235
|
10
|
100
|
|
|
|
22
|
unless (exists $href_HoH_sets->{$href_operand_left}) |
236
|
|
|
|
|
|
|
{ |
237
|
2
|
50
|
|
|
|
15
|
$debug && cluck "ERROR: Unknown left operand \"$href_operand_left\" in formula \"$curr_formula\"\n"; |
238
|
2
|
|
|
|
|
7
|
return; |
239
|
|
|
|
|
|
|
} |
240
|
|
|
|
|
|
|
|
241
|
8
|
50
|
|
|
|
28
|
unless (exists $href_HoH_sets->{$href_operand_right}) |
242
|
|
|
|
|
|
|
{ |
243
|
0
|
0
|
|
|
|
0
|
$debug && cluck "ERROR: Unknown right operand \"$href_operand_right\" in formula \"$curr_formula\"\n"; |
244
|
0
|
|
|
|
|
0
|
return; |
245
|
|
|
|
|
|
|
} |
246
|
|
|
|
|
|
|
|
247
|
8
|
50
|
|
|
|
16
|
if ($debug) |
248
|
|
|
|
|
|
|
{ |
249
|
0
|
|
|
|
|
0
|
printf "!!! %-13s : ", $href_operand_left; |
250
|
0
|
|
|
|
|
0
|
for ( keys %{$href_HoH_sets->{$href_operand_left}} ) {print "$_ "} |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
251
|
0
|
|
|
|
|
0
|
print "\n"; |
252
|
|
|
|
|
|
|
|
253
|
0
|
|
|
|
|
0
|
printf "!!! %-13s : ", $href_operand_right; |
254
|
0
|
|
|
|
|
0
|
for ( keys %{$href_HoH_sets->{$href_operand_right}} ) {print "$_ "} |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
255
|
0
|
|
|
|
|
0
|
print "\n"; |
256
|
|
|
|
|
|
|
} |
257
|
|
|
|
|
|
|
|
258
|
8
|
|
|
|
|
32
|
$operators{$operator} ( $href_HoH_sets->{$href_operand_left} |
259
|
|
|
|
|
|
|
, $href_HoH_sets->{$href_operand_right} |
260
|
|
|
|
|
|
|
, $href_result ); |
261
|
|
|
|
|
|
|
|
262
|
8
|
50
|
|
|
|
23
|
if ($debug) |
263
|
|
|
|
|
|
|
{ |
264
|
0
|
|
|
|
|
0
|
print "DEBUG: result of ($href_operand_left $operator $href_operand_right) : "; |
265
|
0
|
|
|
|
|
0
|
for (keys %{$href_result}) { print "$_ " } |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
266
|
0
|
|
|
|
|
0
|
print "\n"; |
267
|
|
|
|
|
|
|
} |
268
|
|
|
|
|
|
|
|
269
|
8
|
100
|
|
|
|
28
|
if ($href_remainder =~ /\S/) |
270
|
|
|
|
|
|
|
{ |
271
|
2
|
|
|
|
|
3
|
$new_name = "InTeRmEdIaTe$counter"; |
272
|
2
|
|
|
|
|
3
|
$counter++; |
273
|
2
|
|
|
|
|
4
|
for (keys %{$href_result}) { $href_HoH_sets->{$new_name}{$_} = 0 } |
|
2
|
|
|
|
|
8
|
|
|
4
|
|
|
|
|
18
|
|
274
|
2
|
50
|
|
|
|
8
|
unless (exists $href_HoH_sets->{$new_name}) { $href_HoH_sets->{$new_name} = () } |
|
0
|
|
|
|
|
0
|
|
275
|
2
|
|
|
|
|
4
|
%{$href_result} = (); # reset this hash |
|
2
|
|
|
|
|
4
|
|
276
|
|
|
|
|
|
|
|
277
|
2
|
|
|
|
|
6
|
$curr_formula = "$new_name $href_remainder"; |
278
|
2
|
50
|
|
|
|
8
|
$debug && print "#4 curr_formula = $curr_formula\n\n"; |
279
|
2
|
50
|
|
|
|
5
|
if (defined &formula_calcul ($curr_formula, $href_result, $href_HoH_sets, $debug)) |
280
|
2
|
|
|
|
|
9
|
{ return 1; } |
281
|
0
|
0
|
|
|
|
0
|
else { $debug && cluck "ERROR 33\n"; return; } |
|
0
|
|
|
|
|
0
|
|
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
} # end of "if ( $curr_formula =~ ...)" |
284
|
6
|
|
|
|
|
21
|
return 1; |
285
|
|
|
|
|
|
|
} # end of "sub formula_calcul" |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
1; |
288
|
|
|
|
|
|
|
__END__ |