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src/inc/version/vpp.pm  view on Meta::CPAN

	# and we never support negative version numbers
	if ($d eq '-') {
	    return BADVERSION($s,$errstr,"Invalid version format (negative version number)");
	}

	# consume all of the integer part
	while (isDIGIT($d)) {
	    $d++;
	}

	# look for a fractional part
	if ($d eq '.') {
	    # we found it, so consume it
	    $saw_decimal++;
	    $d++;
	}
	elsif (!$d || $d eq ';' || isSPACE($d) || $d eq '}') {
	    if ( $d == $s ) {
		# found nothing
		return BADVERSION($s,$errstr,"Invalid version format (version required)");
	    }
	    # found just an integer
	    goto version_prescan_finish;
	}
	elsif ( $d == $s ) {
	    # didn't find either integer or period
	    return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
	}
	elsif ($d eq '_') {
	    # underscore can't come after integer part
	    if ($strict) {
		return BADVERSION($s,$errstr,"Invalid version format (no underscores)");
	    }
	    elsif (isDIGIT($d+1)) {
		return BADVERSION($s,$errstr,"Invalid version format (alpha without decimal)");
	    }
	    else {
		return BADVERSION($s,$errstr,"Invalid version format (misplaced underscore)");
	    }
	}
	elsif ($d) {
	    # anything else after integer part is just invalid data
	    return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
	}

	# scan the fractional part after the decimal point
	if ($d && !isDIGIT($d) && ($strict || ! ($d eq ';' || isSPACE($d) || $d eq '}') )) {
		# $strict or lax-but-not-the-end
		return BADVERSION($s,$errstr,"Invalid version format (fractional part required)");
	}

	while (isDIGIT($d)) {
	    $d++;
	    if ($d eq '.' && isDIGIT($d-1)) {
		if ($alpha) {
		    return BADVERSION($s,$errstr,"Invalid version format (underscores before decimal)");
		}
		if ($strict) {
		    return BADVERSION($s,$errstr,"Invalid version format (dotted-decimal versions must begin with 'v')");
		}
		$d = $s; # start all over again
		$qv = TRUE;
		goto dotted_decimal_version;
	    }
	    if ($d eq '_') {
		if ($strict) {
		    return BADVERSION($s,$errstr,"Invalid version format (no underscores)");
		}
		if ( $alpha ) {
		    return BADVERSION($s,$errstr,"Invalid version format (multiple underscores)");
		}
		if ( ! isDIGIT($d+1) ) {
		    return BADVERSION($s,$errstr,"Invalid version format (misplaced underscore)");
		}
		$d++;
		$alpha = TRUE;
	    }
	}
    }

version_prescan_finish:
    while (isSPACE($d)) {
	$d++;
    }

    if ($d && !isDIGIT($d) && (! ($d eq ';' || $d eq '}') )) {
	# trailing non-numeric data
	return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
    }

    if (defined $sqv) {
	$$sqv = $qv;
    }
    if (defined $swidth) {
	$$swidth = $width;
    }
    if (defined $ssaw_decimal) {
	$$ssaw_decimal = $saw_decimal;
    }
    if (defined $salpha) {
	$$salpha = $alpha;
    }
    return $d;
}

sub scan_version {
    my ($s, $rv, $qv) = @_;
    my $start;
    my $pos;
    my $last;
    my $errstr;
    my $saw_decimal = 0;
    my $width = 3;
    my $alpha = FALSE;
    my $vinf = FALSE;
    my @av;

    $s = new charstar $s;

    while (isSPACE($s)) { # leading whitespace is OK
	$s++;
    }

    $last = prescan_version($s, FALSE, \$errstr, \$qv, \$saw_decimal,
	\$width, \$alpha);

    if ($errstr) {
	# 'undef' is a special case and not an error
	if ( $s ne 'undef') {
	    use Carp;
	    Carp::croak($errstr);
	}
    }

    $start = $s;
    if ($s eq 'v') {
	$s++;
    }
    $pos = $s;

    if ( $qv ) {
	$$rv->{qv} = $qv;
    }
    if ( $alpha ) {
	$$rv->{alpha} = $alpha;
    }
    if ( !$qv && $width < 3 ) {
	$$rv->{width} = $width;
    }

    while (isDIGIT($pos)) {
	$pos++;
    }
    if (!isALPHA($pos)) {
	my $rev;

	for (;;) {
	    $rev = 0;
	    {
  		# this is atoi() that delimits on underscores
  		my $end = $pos;
  		my $mult = 1;
		my $orev;

		#  the following if() will only be true after the decimal
		#  point of a version originally created with a bare
		#  floating point number, i.e. not quoted in any way
		#
 		if ( !$qv && $s > $start && $saw_decimal == 1 ) {
		    $mult *= 100;
 		    while ( $s < $end ) {
			$orev = $rev;
 			$rev += $s * $mult;
 			$mult /= 10;
			if (   (abs($orev) > abs($rev))
			    || (abs($rev) > $VERSION_MAX )) {
			    warn("Integer overflow in version %d",
					   $VERSION_MAX);
			    $s = $end - 1;
			    $rev = $VERSION_MAX;
			    $vinf = 1;
			}
 			$s++;
			if ( $s eq '_' ) {
			    $s++;
			}
 		    }
  		}
 		else {
 		    while (--$end >= $s) {
			$orev = $rev;
 			$rev += $end * $mult;
 			$mult *= 10;
			if (   (abs($orev) > abs($rev))
			    || (abs($rev) > $VERSION_MAX )) {
			    warn("Integer overflow in version");
			    $end = $s - 1;
			    $rev = $VERSION_MAX;
			    $vinf = 1;
			}
 		    }
 		}
  	    }

  	    # Append revision
	    push @av, $rev;
	    if ( $vinf ) {
		$s = $last;
		last;
	    }
	    elsif ( $pos eq '.' ) {
		$s = ++$pos;
	    }
	    elsif ( $pos eq '_' && isDIGIT($pos+1) ) {
		$s = ++$pos;
	    }
	    elsif ( $pos eq ',' && isDIGIT($pos+1) ) {
		$s = ++$pos;
	    }
	    elsif ( isDIGIT($pos) ) {
		$s = $pos;
	    }
	    else {
		$s = $pos;
		last;
	    }
	    if ( $qv ) {
		while ( isDIGIT($pos) ) {
		    $pos++;
		}
	    }
	    else {
		my $digits = 0;
		while ( ( isDIGIT($pos) || $pos eq '_' ) && $digits < 3 ) {
		    if ( $pos ne '_' ) {
			$digits++;
		    }
		    $pos++;
		}
	    }
	}
    }
    if ( $qv ) { # quoted versions always get at least three terms
	my $len = $#av;
	#  This for loop appears to trigger a compiler bug on OS X, as it
	#  loops infinitely. Yes, len is negative. No, it makes no sense.
	#  Compiler in question is:
	#  gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
	#  for ( len = 2 - len; len > 0; len-- )
	#  av_push(MUTABLE_AV(sv), newSViv(0));
	#
	$len = 2 - $len;
	while ($len-- > 0) {
	    push @av, 0;
	}
    }

    # need to save off the current version string for later
    if ( $vinf ) {
	$$rv->{original} = "v.Inf";
	$$rv->{vinf} = 1;
    }
    elsif ( $s > $start ) {
	$$rv->{original} = $start->currstr($s);
	if ( $qv && $saw_decimal == 1 && $start ne 'v' ) {
	    # need to insert a v to be consistent
	    $$rv->{original} = 'v' . $$rv->{original};
	}
    }
    else {
	$$rv->{original} = '0';
	push(@av, 0);
    }

    # And finally, store the AV in the hash
    $$rv->{version} = \@av;

    # fix RT#19517 - special case 'undef' as string
    if ($s eq 'undef') {
	$s += 5;
    }

    return $s;
}

sub new
{
	my ($class, $value) = @_;
	my $self = bless ({}, ref ($class) || $class);
	my $qv = FALSE;

	if ( ref($value) && eval('$value->isa("version")') ) {
	    # Can copy the elements directly
	    $self->{version} = [ @{$value->{version} } ];
	    $self->{qv} = 1 if $value->{qv};
	    $self->{alpha} = 1 if $value->{alpha};
	    $self->{original} = ''.$value->{original};
	    return $self;
	}

	my $currlocale = setlocale(LC_ALL);

	# if the current locale uses commas for decimal points, we
	# just replace commas with decimal places, rather than changing
	# locales
	if ( localeconv()->{decimal_point} eq ',' ) {
	    $value =~ tr/,/./;
	}

	if ( not defined $value or $value =~ /^undef$/ ) {
	    # RT #19517 - special case for undef comparison
	    # or someone forgot to pass a value
	    push @{$self->{version}}, 0;
	    $self->{original} = "0";
	    return ($self);
	}

	if ( $#_ == 2 ) { # must be CVS-style
	    $value = $_[2];
	    $qv = TRUE;
	}

	$value = _un_vstring($value);

	# exponential notation