1 # ripped from vpp.pm, part of the perl licensed version-0.99 dist by JPEACOCK
3 # version::vpp renamed to version::fallback::vpp
4 # charstar renamed to version::fallback::charstar
5 # 'new charstar $s' changed to 'version::fallback::charstar->new($s)'
7 package version::fallback::charstar;
8 # a little helper class to emulate C char* semantics in Perl
9 # so that prescan_version can use the same code as in C
26 my ($self, $string) = @_;
27 my $class = ref($self) || $self;
30 string => [split(//,$string)],
33 return bless $obj, $class;
38 my $last = $#{$self->{string}};
39 my $curr = $self->{current};
40 if ($curr >= 0 && $curr <= $last) {
41 return $self->{string}->[$curr];
59 my ($self, $offset) = @_;
60 my $rself = $self->clone;
61 $rself->{current} += $offset;
66 my ($self, $offset) = @_;
67 my $rself = $self->clone;
68 $rself->{current} -= $offset;
73 my ($left, $right, $swapped) = @_;
74 my $char = $left->thischar();
75 return $char * $right;
79 my ($left, $right, $swapped) = @_;
80 unless (ref($right)) { # not an object already
81 $right = $left->new($right);
83 return $left->{current} <=> $right->{current};
87 my ($left, $right, $swapped) = @_;
88 unless (ref($right)) { # not an object already
89 if (length($right) == 1) { # comparing single character only
90 return $left->thischar cmp $right;
92 $right = $left->new($right);
94 return $left->currstr cmp $right->currstr;
99 my $char = $self->thischar;
100 return ($char ne '');
104 my ($left, $right, $swapped) = @_;
106 string => [@{$left->{string}}],
107 current => $left->{current},
109 return bless $right, ref($left);
114 my $curr = $self->{current};
115 my $last = $#{$self->{string}};
116 if (defined($s) && $s->{current} < $last) {
117 $last = $s->{current};
120 my $string = join('', @{$self->{string}}[$curr..$last]);
124 package version::fallback::vpp;
127 use POSIX qw/locale_h/;
129 use vars qw ($VERSION @ISA @REGEXS);
154 sub enabled {return $^W;}
159 my $VERSION_MAX = 0x7FFFFFFF;
161 # implement prescan_version as closely to the C version as possible
162 use constant TRUE => 1;
163 use constant FALSE => 0;
166 my ($char) = shift->thischar();
167 return ($char =~ /\d/);
171 my ($char) = shift->thischar();
172 return ($char =~ /[a-zA-Z]/);
176 my ($char) = shift->thischar();
177 return ($char =~ /\s/);
181 my ($s, $errstr, $error) = @_;
188 sub prescan_version {
189 my ($s, $strict, $errstr, $sqv, $ssaw_decimal, $swidth, $salpha) = @_;
190 my $qv = defined $sqv ? $$sqv : FALSE;
191 my $saw_decimal = defined $ssaw_decimal ? $$ssaw_decimal : 0;
192 my $width = defined $swidth ? $$swidth : 3;
193 my $alpha = defined $salpha ? $$salpha : FALSE;
197 if ($qv && isDIGIT($d)) {
198 goto dotted_decimal_version;
201 if ($d eq 'v') { # explicit v-string
206 else { # degenerate v-string
208 return BADVERSION($s,$errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
211 dotted_decimal_version:
212 if ($strict && $d eq '0' && isDIGIT($d+1)) {
213 # no leading zeros allowed
214 return BADVERSION($s,$errstr,"Invalid version format (no leading zeros)");
217 while (isDIGIT($d)) { # integer part
224 $d++; # decimal point
230 return BADVERSION($s,$errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
233 goto version_prescan_finish;
240 while (isDIGIT($d)) { # just keep reading
242 while (isDIGIT($d)) {
244 # maximum 3 digits between decimal
245 if ($strict && $j > 3) {
246 return BADVERSION($s,$errstr,"Invalid version format (maximum 3 digits between decimals)");
251 return BADVERSION($s,$errstr,"Invalid version format (no underscores)");
254 return BADVERSION($s,$errstr,"Invalid version format (multiple underscores)");
261 return BADVERSION($s,$errstr,"Invalid version format (underscores before decimal)");
266 elsif (!isDIGIT($d)) {
272 if ($strict && $i < 2) {
274 return BADVERSION($s,$errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
277 } # end if dotted-decimal
280 # special $strict case for leading '.' or '0'
283 return BADVERSION($s,$errstr,"Invalid version format (0 before decimal required)");
285 if ($d eq '0' && isDIGIT($d+1)) {
286 return BADVERSION($s,$errstr,"Invalid version format (no leading zeros)");
290 # and we never support negative version numbers
292 return BADVERSION($s,$errstr,"Invalid version format (negative version number)");
295 # consume all of the integer part
296 while (isDIGIT($d)) {
300 # look for a fractional part
302 # we found it, so consume it
306 elsif (!$d || $d eq ';' || isSPACE($d) || $d eq '}') {
309 return BADVERSION($s,$errstr,"Invalid version format (version required)");
311 # found just an integer
312 goto version_prescan_finish;
315 # didn't find either integer or period
316 return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
319 # underscore can't come after integer part
321 return BADVERSION($s,$errstr,"Invalid version format (no underscores)");
323 elsif (isDIGIT($d+1)) {
324 return BADVERSION($s,$errstr,"Invalid version format (alpha without decimal)");
327 return BADVERSION($s,$errstr,"Invalid version format (misplaced underscore)");
331 # anything else after integer part is just invalid data
332 return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
335 # scan the fractional part after the decimal point
336 if ($d && !isDIGIT($d) && ($strict || ! ($d eq ';' || isSPACE($d) || $d eq '}') )) {
337 # $strict or lax-but-not-the-end
338 return BADVERSION($s,$errstr,"Invalid version format (fractional part required)");
341 while (isDIGIT($d)) {
343 if ($d eq '.' && isDIGIT($d-1)) {
345 return BADVERSION($s,$errstr,"Invalid version format (underscores before decimal)");
348 return BADVERSION($s,$errstr,"Invalid version format (dotted-decimal versions must begin with 'v')");
350 $d = $s; # start all over again
352 goto dotted_decimal_version;
356 return BADVERSION($s,$errstr,"Invalid version format (no underscores)");
359 return BADVERSION($s,$errstr,"Invalid version format (multiple underscores)");
361 if ( ! isDIGIT($d+1) ) {
362 return BADVERSION($s,$errstr,"Invalid version format (misplaced underscore)");
370 version_prescan_finish:
371 while (isSPACE($d)) {
375 if ($d && !isDIGIT($d) && (! ($d eq ';' || $d eq '}') )) {
376 # trailing non-numeric data
377 return BADVERSION($s,$errstr,"Invalid version format (non-numeric data)");
383 if (defined $swidth) {
386 if (defined $ssaw_decimal) {
387 $$ssaw_decimal = $saw_decimal;
389 if (defined $salpha) {
396 my ($s, $rv, $qv) = @_;
407 $s = version::fallback::charstar->new($s);
409 while (isSPACE($s)) { # leading whitespace is OK
413 $last = prescan_version($s, FALSE, \$errstr, \$qv, \$saw_decimal,
417 # 'undef' is a special case and not an error
418 if ( $s ne 'undef') {
420 Carp::croak($errstr);
434 $$rv->{alpha} = $alpha;
436 if ( !$qv && $width < 3 ) {
437 $$rv->{width} = $width;
440 while (isDIGIT($pos)) {
443 if (!isALPHA($pos)) {
449 # this is atoi() that delimits on underscores
454 # the following if() will only be true after the decimal
455 # point of a version originally created with a bare
456 # floating point number, i.e. not quoted in any way
458 if ( !$qv && $s > $start && $saw_decimal == 1 ) {
460 while ( $s < $end ) {
464 if ( (abs($orev) > abs($rev))
465 || (abs($rev) > $VERSION_MAX )) {
466 warn("Integer overflow in version %d",
479 while (--$end >= $s) {
481 $rev += $end * $mult;
483 if ( (abs($orev) > abs($rev))
484 || (abs($rev) > $VERSION_MAX )) {
485 warn("Integer overflow in version");
500 elsif ( $pos eq '.' ) {
503 elsif ( $pos eq '_' && isDIGIT($pos+1) ) {
506 elsif ( $pos eq ',' && isDIGIT($pos+1) ) {
509 elsif ( isDIGIT($pos) ) {
517 while ( isDIGIT($pos) ) {
523 while ( ( isDIGIT($pos) || $pos eq '_' ) && $digits < 3 ) {
532 if ( $qv ) { # quoted versions always get at least three terms
534 # This for loop appears to trigger a compiler bug on OS X, as it
535 # loops infinitely. Yes, len is negative. No, it makes no sense.
536 # Compiler in question is:
537 # gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
538 # for ( len = 2 - len; len > 0; len-- )
539 # av_push(MUTABLE_AV(sv), newSViv(0));
547 # need to save off the current version string for later
549 $$rv->{original} = "v.Inf";
552 elsif ( $s > $start ) {
553 $$rv->{original} = $start->currstr($s);
554 if ( $qv && $saw_decimal == 1 && $start ne 'v' ) {
555 # need to insert a v to be consistent
556 $$rv->{original} = 'v' . $$rv->{original};
560 $$rv->{original} = '0';
564 # And finally, store the AV in the hash
565 $$rv->{version} = \@av;
567 # fix RT#19517 - special case 'undef' as string
577 my ($class, $value) = @_;
578 my $self = bless ({}, ref ($class) || $class);
581 if ( ref($value) && eval('$value->isa("version")') ) {
582 # Can copy the elements directly
583 $self->{version} = [ @{$value->{version} } ];
584 $self->{qv} = 1 if $value->{qv};
585 $self->{alpha} = 1 if $value->{alpha};
586 $self->{original} = ''.$value->{original};
590 my $currlocale = setlocale(LC_ALL);
592 # if the current locale uses commas for decimal points, we
593 # just replace commas with decimal places, rather than changing
595 if ( localeconv()->{decimal_point} eq ',' ) {
599 if ( not defined $value or $value =~ /^undef$/ ) {
600 # RT #19517 - special case for undef comparison
601 # or someone forgot to pass a value
602 push @{$self->{version}}, 0;
603 $self->{original} = "0";
607 if ( $#_ == 2 ) { # must be CVS-style
612 $value = _un_vstring($value);
614 # exponential notation
615 if ( $value =~ /\d+.?\d*e[-+]?\d+/ ) {
616 $value = sprintf("%.9f",$value);
617 $value =~ s/(0+)$//; # trim trailing zeros
620 my $s = scan_version($value, \$self, $qv);
622 if ($s) { # must be something left over
623 warn("Version string '%s' contains invalid data; "
624 ."ignoring: '%s'", $value, $s);
635 unless (_verify($self)) {
637 Carp::croak("Invalid version object");
639 my $width = $self->{width} || 3;
640 my $alpha = $self->{alpha} || "";
641 my $len = $#{$self->{version}};
642 my $digit = $self->{version}[0];
643 my $string = sprintf("%d.", $digit );
645 for ( my $i = 1 ; $i < $len ; $i++ ) {
646 $digit = $self->{version}[$i];
648 my $denom = 10**(3-$width);
649 my $quot = int($digit/$denom);
650 my $rem = $digit - ($quot * $denom);
651 $string .= sprintf("%0".$width."d_%d", $quot, $rem);
654 $string .= sprintf("%03d", $digit);
659 $digit = $self->{version}[$len];
660 if ( $alpha && $width == 3 ) {
663 $string .= sprintf("%0".$width."d", $digit);
667 $string .= sprintf("000");
676 unless (_verify($self)) {
678 Carp::croak("Invalid version object");
680 my $alpha = $self->{alpha} || "";
681 my $len = $#{$self->{version}};
682 my $digit = $self->{version}[0];
683 my $string = sprintf("v%d", $digit );
685 for ( my $i = 1 ; $i < $len ; $i++ ) {
686 $digit = $self->{version}[$i];
687 $string .= sprintf(".%d", $digit);
691 $digit = $self->{version}[$len];
693 $string .= sprintf("_%0d", $digit);
696 $string .= sprintf(".%0d", $digit);
701 for ( $len = 2 - $len; $len != 0; $len-- ) {
702 $string .= sprintf(".%0d", 0);
712 unless (_verify($self)) {
714 Carp::croak("Invalid version object");
716 return exists $self->{original}
726 my ($left,$right,$swap) = @_;
727 my $class = ref($left);
728 unless ( UNIVERSAL::isa($right, $class) ) {
729 $right = $class->new($right);
733 ($left, $right) = ($right, $left);
735 unless (_verify($left)) {
737 Carp::croak("Invalid version object");
739 unless (_verify($right)) {
741 Carp::croak("Invalid version format");
743 my $l = $#{$left->{version}};
744 my $r = $#{$right->{version}};
745 my $m = $l < $r ? $l : $r;
746 my $lalpha = $left->is_alpha;
747 my $ralpha = $right->is_alpha;
750 while ( $i <= $m && $retval == 0 ) {
751 $retval = $left->{version}[$i] <=> $right->{version}[$i];
755 # tiebreaker for alpha with identical terms
758 && $left->{version}[$m] == $right->{version}[$m]
759 && ( $lalpha || $ralpha ) ) {
761 if ( $lalpha && !$ralpha ) {
764 elsif ( $ralpha && !$lalpha) {
769 # possible match except for trailing 0's
770 if ( $retval == 0 && $l != $r ) {
772 while ( $i <= $r && $retval == 0 ) {
773 if ( $right->{version}[$i] != 0 ) {
774 $retval = -1; # not a match after all
780 while ( $i <= $l && $retval == 0 ) {
781 if ( $left->{version}[$i] != 0 ) {
782 $retval = +1; # not a match after all
794 return vcmp($self,$self->new("0"),1);
799 Carp::croak("operation not supported with version object");
804 return (exists $self->{alpha});
809 my $class = 'version';
811 $class = ref($value) || $value;
815 $value = _un_vstring($value);
816 $value = 'v'.$value unless $value =~ /(^v|\d+\.\d+\.\d)/;
817 my $obj = version->new($value);
818 return bless $obj, $class;
825 return (exists $self->{qv});
832 && eval { exists $self->{version} }
833 && ref($self->{version}) eq 'ARRAY'
842 sub _is_non_alphanumeric {
844 $s = version::fallback::charstar->new($s);
846 return 0 if isSPACE($s); # early out
847 return 1 unless (isALPHA($s) || isDIGIT($s) || $s =~ /[.-]/);
856 if ( length($value) >= 3 && $value !~ /[._]/
857 && _is_non_alphanumeric($value)) {
859 if ( $] ge 5.008_001 ) {
860 $tvalue = _find_magic_vstring($value);
861 $value = $tvalue if length $tvalue;
863 elsif ( $] ge 5.006_000 ) {
864 $tvalue = sprintf("v%vd",$value);
865 if ( $tvalue =~ /^v\d+(\.\d+){2,}$/ ) {
874 sub _find_magic_vstring {
878 my $sv = B::svref_2object(\$value);
879 my $magic = ref($sv) eq 'B::PVMG' ? $sv->MAGIC : undef;
881 if ( $magic->TYPE eq 'V' ) {
882 $tvalue = $magic->PTR;
883 $tvalue =~ s/^v?(.+)$/v$1/;
887 $magic = $magic->MOREMAGIC;
894 my ($obj, $req) = @_;
895 my $class = ref($obj) || $obj;
898 if ( exists $INC{"$class.pm"} and not %{"$class\::"} and $] >= 5.008) {
899 # file but no package
901 Carp::croak( "$class defines neither package nor VERSION"
902 ."--version check failed");
905 my $version = eval "\$$class\::VERSION";
906 if ( defined $version ) {
907 local $^W if $] <= 5.008;
908 $version = version::vpp->new($version);
911 if ( defined $req ) {
912 unless ( defined $version ) {
915 ? "$class version $req required--this is only version "
916 : "$class does not define \$$class\::VERSION"
917 ."--version check failed";
919 if ( $ENV{VERSION_DEBUG} ) {
927 $req = version::vpp->new($req);
929 if ( $req > $version ) {
933 sprintf ("%s version %s required--".
934 "this is only version %s", $class,
935 $req->normal, $version->normal)
940 sprintf ("%s version %s required--".
941 "this is only version %s", $class,
942 $req->stringify, $version->stringify)
948 return defined $version ? $version->stringify : undef;
951 1; #this line is important and will help the module return a true value