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package DBIx::DataStore::Debug; |
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$DBIx::DataStore::Debug::VERSION = '0.097'; |
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use strict; |
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use warnings; |
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867
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sub import { |
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my ($pkg, $debug_level) = @_; |
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$debug_level = 0 unless defined $debug_level && $debug_level =~ /^\d+$/o && $debug_level > 0; |
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unless (eval "defined DBIx::DataStore::DEBUG();") { |
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eval("sub DEBUG () { return $debug_level; }"); # give ourselves an easy-to-reference local copy |
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eval("sub DBIx::DataStore::DEBUG () { return $debug_level; }"); |
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eval("sub DBIx::DataStore::dslog { DBIx::DataStore::Debug::_logger(\@_) }"); |
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} |
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_logger(q{Debug mode enabled at level}, $debug_level) if $debug_level > 0; |
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} |
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sub _logger { |
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my @args = scalar(@_) > 0 ? @_ : (); |
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my @c = caller(1); |
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0
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my $out = sprintf("[%s] %s,%d", scalar(localtime()), $c[1], $c[2]); |
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# at debugging level 5 and higher we dump the full stack (and abandon single-line output) |
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if (DEBUG() >= 5) { |
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$out .= "\n"; |
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my $i = 0; |
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my (@stack); |
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while (@c = caller($i)) { |
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push(@stack, [@c]); |
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$i++; |
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} |
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0
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if (scalar(@stack) > 0) { |
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# drop in some column headings, just so output is unambiguous (at the end, since we reverse the stack |
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# prior to printing it out) |
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push(@stack, [qw( Package Filename Line Subroutine Hasargs Wantarray Evaltext Isrequire Hints Bitmask )]); |
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# get column widths |
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0
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my @w = (0) x scalar(@{$stack[0]}); |
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0
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for ($i = 0; $i < scalar(@w); $i++) { |
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0
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for (my $j = 0; $j < scalar(@stack); $j++) { |
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0
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my $l = defined $stack[$j]->[$i] ? length($stack[$j]->[$i]) : 0; |
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$w[$i] = $l if $l > $w[$i]; |
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} |
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} |
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0
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$out .= " ** STACK TRACE\n"; |
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0
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foreach (reverse @stack) { |
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@c = @{$_}; |
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53
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0
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$out .= sprintf(" + %-$w[0]s %-$w[1]s %$w[2]s %-$w[3]s\n", @c[0..3]); |
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} |
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56
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0
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$out .= " ** MESSAGE\n"; |
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} |
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} else { |
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0
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$out .= ": "; |
60
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} |
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62
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0
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0
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$out .= scalar(@args) > 0 ? qq{@args\n} : qq{ -- NO MESSAGE -- \n}; |
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64
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0
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0
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$out .= " ** END\n" if DEBUG() >= 5; |
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66
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0
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print STDERR $out; |
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68
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0
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return; |
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} |
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71
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1; |