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Filename: //lib/x86_64-linux-gnu/perl-base/Text/ParseWords.pm
package Text::ParseWords; use strict; require 5.006; our $VERSION = "3.30"; use Exporter; our @ISA = qw(Exporter); our @EXPORT = qw(shellwords quotewords nested_quotewords parse_line); our @EXPORT_OK = qw(old_shellwords); our $PERL_SINGLE_QUOTE; sub shellwords { my (@lines) = @_; my @allwords; foreach my $line (@lines) { $line =~ s/^\s+//; my @words = parse_line('\s+', 0, $line); pop @words if (@words and !defined $words[-1]); return() unless (@words || !length($line)); push(@allwords, @words); } return(@allwords); } sub quotewords { my($delim, $keep, @lines) = @_; my($line, @words, @allwords); foreach $line (@lines) { @words = parse_line($delim, $keep, $line); return() unless (@words || !length($line)); push(@allwords, @words); } return(@allwords); } sub nested_quotewords { my($delim, $keep, @lines) = @_; my($i, @allwords); for ($i = 0; $i < @lines; $i++) { @{$allwords[$i]} = parse_line($delim, $keep, $lines[$i]); return() unless (@{$allwords[$i]} || !length($lines[$i])); } return(@allwords); } sub parse_line { my($delimiter, $keep, $line) = @_; my($word, @pieces); no warnings 'uninitialized'; # we will be testing undef strings while (length($line)) { # This pattern is optimised to be stack conservative on older perls. # Do not refactor without being careful and testing it on very long strings. # See Perl bug #42980 for an example of a stack busting input. $line =~ s/^ (?: # double quoted string (") # $quote ((?>[^\\"]*(?:\\.[^\\"]*)*))" # $quoted | # --OR-- # singe quoted string (') # $quote ((?>[^\\']*(?:\\.[^\\']*)*))' # $quoted | # --OR-- # unquoted string ( # $unquoted (?:\\.|[^\\"'])*? ) # followed by ( # $delim \Z(?!\n) # EOL | # --OR-- (?-x:$delimiter) # delimiter | # --OR-- (?!^)(?=["']) # a quote ) )//xs or return; # extended layout my ($quote, $quoted, $unquoted, $delim) = (($1 ? ($1,$2) : ($3,$4)), $5, $6); return() unless( defined($quote) || length($unquoted) || length($delim)); if ($keep) { $quoted = "$quote$quoted$quote"; } else { $unquoted =~ s/\\(.)/$1/sg; if (defined $quote) { $quoted =~ s/\\(.)/$1/sg if ($quote eq '"'); $quoted =~ s/\\([\\'])/$1/g if ( $PERL_SINGLE_QUOTE && $quote eq "'"); } } $word .= substr($line, 0, 0); # leave results tainted $word .= defined $quote ? $quoted : $unquoted; if (length($delim)) { push(@pieces, $word); push(@pieces, $delim) if ($keep eq 'delimiters'); undef $word; } if (!length($line)) { push(@pieces, $word); } } return(@pieces); } sub old_shellwords { # Usage: # use ParseWords; # @words = old_shellwords($line); # or # @words = old_shellwords(@lines); # or # @words = old_shellwords(); # defaults to $_ (and clobbers it) no warnings 'uninitialized'; # we will be testing undef strings local *_ = \join('', @_) if @_; my (@words, $snippet); s/\A\s+//; while ($_ ne '') { my $field = substr($_, 0, 0); # leave results tainted for (;;) { if (s/\A"(([^"\\]|\\.)*)"//s) { ($snippet = $1) =~ s#\\(.)#$1#sg; } elsif (/\A"/) { require Carp; Carp::carp("Unmatched double quote: $_"); return(); } elsif (s/\A'(([^'\\]|\\.)*)'//s) { ($snippet = $1) =~ s#\\(.)#$1#sg; } elsif (/\A'/) { require Carp; Carp::carp("Unmatched single quote: $_"); return(); } elsif (s/\A\\(.?)//s) { $snippet = $1; } elsif (s/\A([^\s\\'"]+)//) { $snippet = $1; } else { s/\A\s+//; last; } $field .= $snippet; } push(@words, $field); } return @words; } 1; __END__
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