App-GhaInstall

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lib/App/GhaInstall/JSON.pm  view on Meta::CPAN

    die "Missing or empty input\n" unless length( local $_ = shift );

    # UTF-8
    $_ = eval { Encode::decode('UTF-8', $_, 1) } unless shift;
    die "Input is not UTF-8 encoded\n" unless defined $_;

    # Value
    $$valueref = _decode_value();

    # Leftover data
    return m/\G[\x20\x09\x0a\x0d]*\z/gc || _throw('Unexpected data');
  } ? return undef : chomp $@;

  return $@;
}

sub _decode_array {
  my @array;
  until (m/\G[\x20\x09\x0a\x0d]*\]/gc) {

    # Value
    push @array, _decode_value();

    # Separator
    redo if m/\G[\x20\x09\x0a\x0d]*,/gc;

    # End
    last if m/\G[\x20\x09\x0a\x0d]*\]/gc;

    # Invalid character
    _throw('Expected comma or right square bracket while parsing array');
  }

  return \@array;
}

sub _decode_object {
  my %hash;
  until (m/\G[\x20\x09\x0a\x0d]*\}/gc) {

    # Quote
    m/\G[\x20\x09\x0a\x0d]*"/gc
      or _throw('Expected string while parsing object');

    # Key
    my $key = _decode_string();

    # Colon
    m/\G[\x20\x09\x0a\x0d]*:/gc
      or _throw('Expected colon while parsing object');

    # Value
    $hash{$key} = _decode_value();

    # Separator
    redo if m/\G[\x20\x09\x0a\x0d]*,/gc;

    # End
    last if m/\G[\x20\x09\x0a\x0d]*\}/gc;

    # Invalid character
    _throw('Expected comma or right curly bracket while parsing object');
  }

  return \%hash;
}

sub _decode_string {
  my $pos = pos;
  
  # Extract string with escaped characters
  m!\G((?:(?:[^\x00-\x1f\\"]|\\(?:["\\/bfnrt]|u[0-9a-fA-F]{4})){0,32766})*)!gc; # segfault on 5.8.x in t/20-mojo-json.t
  my $str = $1;

  # Invalid character
  unless (m/\G"/gc) {
    _throw('Unexpected character or invalid escape while parsing string')
      if m/\G[\x00-\x1f\\]/;
    _throw('Unterminated string');
  }

  # Unescape popular characters
  if (index($str, '\\u') < 0) {
    $str =~ s!\\(["\\/bfnrt])!$ESCAPE{$1}!gs;
    return $str;
  }

  # Unescape everything else
  my $buffer = '';

lib/App/GhaInstall/JSON.pm  view on Meta::CPAN

    # Escaped
    else {
      my $ord = hex $3;

      # Surrogate pair
      if (($ord & 0xf800) == 0xd800) {

        # High surrogate
        ($ord & 0xfc00) == 0xd800
          or pos($_) = $pos + pos($str), _throw('Missing high-surrogate');

        # Low surrogate
        $str =~ m/\G\\u([Dd][C-Fc-f]..)/gc
          or pos($_) = $pos + pos($str), _throw('Missing low-surrogate');

        $ord = 0x10000 + ($ord - 0xd800) * 0x400 + (hex($1) - 0xdc00);
      }

      # Character
      $buffer .= pack 'U', $ord;
    }
  }

  # The rest

lib/App/GhaInstall/JSON.pm  view on Meta::CPAN

  # True
  return $TRUE if m/\Gtrue/gc;

  # False
  return $FALSE if m/\Gfalse/gc;

  # Null
  return undef if m/\Gnull/gc;  ## no critic (return)

  # Invalid character
  _throw('Expected string, array, object, number, boolean or null');
}

sub _encode_array {
  '[' . join(',', map { _encode_value($_) } @{$_[0]}) . ']';
}

sub _encode_object {
  my $object = shift;
  my @pairs = map { _encode_string($_) . ':' . _encode_value($object->{$_}) }
    sort keys %$object;

lib/App/GhaInstall/JSON.pm  view on Meta::CPAN

    if B::svref_2object(\$value)->FLAGS & (B::SVp_IOK | B::SVp_NOK)
    # filter out "upgraded" strings whose numeric form doesn't strictly match
    && 0 + $value eq $value
    # filter out inf and nan
    && $value * 0 == 0;

  # String
  return _encode_string($value);
}

sub _throw {

  # Leading whitespace
  m/\G[\x20\x09\x0a\x0d]*/gc;

  # Context
  my $context = 'Malformed JSON: ' . shift;
  if (m/\G\z/gc) { $context .= ' before end of data' }
  else {
    my @lines = split "\n", substr($_, 0, pos);
    $context .= ' at line ' . @lines . ', offset ' . length(pop @lines || '');