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- package Text::ParseWords;
-
- use vars qw($VERSION @ISA @EXPORT $PERL_SINGLE_QUOTE);
- $VERSION = "3.24";
-
- require 5.000;
-
- use Exporter;
- @ISA = qw(Exporter);
- @EXPORT = qw(shellwords quotewords nested_quotewords parse_line);
- @EXPORT_OK = qw(old_shellwords);
-
- sub shellwords {
- my(@lines) = @_;
- $lines[$#lines] =~ s/\s+$//;
- return(quotewords('\s+', 0, @lines));
- }
-
- sub quotewords {
- my($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)) {
- $line =~ s/^(["']) # a $quote
- ((?:\\.|(?!\1)[^\\])*) # and $quoted text
- \1 # followed by the same quote
- | # --OR--
- ^((?:\\.|[^\\"'])*?) # an $unquoted text
- (\Z(?!\n)|(?-x:$delimiter)|(?!^)(?=["']))
- # plus EOL, delimiter, or quote
- //xs or return; # extended layout
- my($quote, $quoted, $unquoted, $delim) = ($1, $2, $3, $4);
- return() unless( defined($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__
-
-