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package TAPx::Parser::Iterator; |
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use strict; |
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use vars qw($VERSION); |
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=head1 NAME |
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TAPx::Parser::Iterator - Internal TAPx::Parser Iterator |
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=head1 VERSION |
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Version 0.50_07 |
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=cut |
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$VERSION = '0.50_07'; |
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=head1 SYNOPSIS |
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use TAPx::Parser::Iterator; |
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my $it = TAPx::Parser::Iterator->new(\*TEST); |
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my $it = TAPx::Parser::Iterator->new(\@array); |
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my $line = $it->next; |
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if ( $it->is_first ) { ... } |
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if ( $it->is_last ) { ... } |
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Originally ripped off from C. |
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=head1 DESCRIPTION |
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B |
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This is a simple iterator wrapper for arrays and filehandles. |
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=head2 new() |
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Create an iterator. |
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=head2 next() |
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Iterate through it, of course. |
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=head2 next_raw() |
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Iterate raw input without applying any fixes for quirky input syntax. |
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=head2 is_first() |
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Returns true if on the first line. Must be called I C. |
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=head2 is_last() |
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Returns true if on or after the last line. Must be called I C. |
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=cut |
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sub new { |
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my ( $proto, $thing ) = @_; |
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my $ref = ref $thing; |
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1211
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if ( $ref eq 'GLOB' || $ref eq 'IO::Handle' ) { |
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# we may eventually allow a 'fast' switch which can read the entire |
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# stream into an array. This seems to speed things up by 10 to 12 |
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# per cent. Should not be used with infinite streams. |
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return TAPx::Parser::Iterator::FH->new($thing); |
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} |
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elsif ( $ref eq 'ARRAY' ) { |
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return TAPx::Parser::Iterator::ARRAY->new($thing); |
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} |
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else { |
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die "Can't iterate with a ", ref $thing; |
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} |
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} |
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eval { require POSIX; &POSIX::WEXITSTATUS(0) }; |
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if ($@) { |
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*_wait2exit = sub { $_[1] >> 8 }; |
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} |
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else { |
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*_wait2exit = sub { POSIX::WEXITSTATUS( $_[1] ) } |
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} |
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package TAPx::Parser::Iterator::FH; |
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use vars qw($VERSION @ISA); |
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7770
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@ISA = 'TAPx::Parser::Iterator'; |
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$VERSION = '0.50_07'; |
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sub new { |
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my ( $class, $thing ) = @_; |
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bless { |
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fh => $thing, |
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next => undef, |
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exit => undef, |
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is_first => 0, |
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is_last => 0, |
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}, $class; |
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} |
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102
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############################################################################## |
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104
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=head3 C |
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106
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my $pid = $source->pid; |
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$source->pid($pid); |
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Getter/Setter for the pid of the process the filehandle reads from. Only |
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makes sense when a filehandle is being used for the iterator. |
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=cut |
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sub pid { |
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my $self = shift; |
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return $self->{pid} unless @_; |
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$self->{pid} = shift; |
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return $self; |
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} |
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sub wait { $_[0]->{wait} } |
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sub exit { $_[0]->{exit} } |
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sub is_first { $_[0]->{is_first} } |
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sub is_last { $_[0]->{is_last} } |
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sub next_raw { |
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my $self = shift; |
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my $fh = $self->{fh}; |
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my $line; |
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if ( defined( $line = $self->{next} ) ) { |
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if ( defined( my $next = <$fh> ) ) { |
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chomp( $self->{next} = $next ); |
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$self->{is_first} = 0; |
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} |
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else { |
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$self->_finish; |
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} |
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} |
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else { |
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$self->{is_first} = 1 unless $self->{is_last}; |
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local $^W; # Don't want to chomp undef values |
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chomp( $line = <$fh> ); |
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unless ( defined $line ) { |
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$self->_finish; |
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} |
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else { |
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29190
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chomp( $self->{next} = <$fh> ); |
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} |
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} |
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return $line; |
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} |
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sub next { |
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9331
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my $self = shift; |
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878
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my $line = $self->next_raw; |
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# vms nit: When encountering 'not ok', vms often has the 'not' on a line |
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# by itself: |
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# not |
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# ok 1 - 'I hate VMS' |
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if ( defined $line && $line =~ /^\s*not\s*$/ ) { |
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$line .= ( $self->next_raw || '' ); |
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} |
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return $line; |
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} |
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sub _finish { |
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my $self = shift; |
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my $status = $?; |
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# If we have a subprocess we need to wait for it to terminate |
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if ( defined $self->{pid} ) { |
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2827
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if ( $self->{pid} == waitpid( $self->{pid}, 0 ) ) { |
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$status = $?; |
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} |
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} |
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1010
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close $self->{fh}; |
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$self->{is_first} = 0; # need to reset it here in case we have no output |
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$self->{is_last} = 1; |
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$self->{next} = undef; |
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$self->{wait} = $status; |
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$self->{exit} = $self->_wait2exit($status); |
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return $self; |
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} |
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191
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package TAPx::Parser::Iterator::ARRAY; |
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193
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13
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13
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163
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use vars qw($VERSION @ISA); |
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24
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13
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3343
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194
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@ISA = 'TAPx::Parser::Iterator'; |
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$VERSION = '0.50_07'; |
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197
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sub new { |
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26
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26
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54
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my ( $class, $thing ) = @_; |
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131
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chomp @$thing; |
200
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257
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bless { |
201
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idx => 0, |
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array => $thing, |
203
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exit => undef, |
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}, $class; |
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} |
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207
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57
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sub wait { shift->exit } |
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100
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683
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sub exit { shift->is_last ? 0 : () } |
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149
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751
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sub is_first { 1 == $_[0]->{idx} } |
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360
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721
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sub is_last { @{ $_[0]->{array} } <= $_[0]->{idx} } |
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2142
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211
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212
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sub next { |
213
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148
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148
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210
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my $self = shift; |
214
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148
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742
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return $self->{array}->[ $self->{idx}++ ]; |
215
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} |
216
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217
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0
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0
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sub next_raw { shift->next } |
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219
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1; |