db-recno.t
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:20k
- #!./perl -w
- use warnings;
- use strict ;
- BEGIN {
- unless(grep /blib/, @INC) {
- chdir 't' if -d 't';
- @INC = '../lib' if -d '../lib';
- }
- }
-
- use Config;
-
- BEGIN {
- if(-d "lib" && -f "TEST") {
- if ($Config{'extensions'} !~ /bDB_Fileb/ ) {
- print "1..128n";
- exit 0;
- }
- }
- }
- use DB_File;
- use Fcntl;
- use vars qw($dbh $Dfile $bad_ones $FA) ;
- # full tied array support started in Perl 5.004_57
- # Double check to see if it is available.
- {
- sub try::TIEARRAY { bless [], "try" }
- sub try::FETCHSIZE { $FA = 1 }
- $FA = 0 ;
- my @a ;
- tie @a, 'try' ;
- my $a = @a ;
- }
- sub ok
- {
- my $no = shift ;
- my $result = shift ;
- print "not " unless $result ;
- print "ok $non" ;
- return $result ;
- }
- {
- package Redirect ;
- use Symbol ;
- sub new
- {
- my $class = shift ;
- my $filename = shift ;
- my $fh = gensym ;
- open ($fh, ">$filename") || die "Cannot open $filename: $!" ;
- my $real_stdout = select($fh) ;
- return bless [$fh, $real_stdout ] ;
- }
- sub DESTROY
- {
- my $self = shift ;
- close $self->[0] ;
- select($self->[1]) ;
- }
- }
- sub docat
- {
- my $file = shift;
- local $/ = undef;
- open(CAT,$file) || die "Cannot open $file:$!";
- my $result = <CAT>;
- close(CAT);
- return $result;
- }
- sub docat_del
- {
- my $file = shift;
- local $/ = undef;
- open(CAT,$file) || die "Cannot open $file: $!";
- my $result = <CAT>;
- close(CAT);
- unlink $file ;
- return $result;
- }
- sub bad_one
- {
- print STDERR <<EOM unless $bad_ones++ ;
- #
- # Some older versions of Berkeley DB version 1 will fail tests 51,
- # 53 and 55.
- #
- # You can safely ignore the errors if you're never going to use the
- # broken functionality (recno databases with a modified bval).
- # Otherwise you'll have to upgrade your DB library.
- #
- # If you want to use Berkeley DB version 1, then 1.85 and 1.86 are the
- # last versions that were released. Berkeley DB version 2 is continually
- # being updated -- Check out http://www.sleepycat.com/ for more details.
- #
- EOM
- }
- print "1..128n";
- my $Dfile = "recno.tmp";
- unlink $Dfile ;
- umask(0);
- # Check the interface to RECNOINFO
- my $dbh = new DB_File::RECNOINFO ;
- ok(1, ! defined $dbh->{bval}) ;
- ok(2, ! defined $dbh->{cachesize}) ;
- ok(3, ! defined $dbh->{psize}) ;
- ok(4, ! defined $dbh->{flags}) ;
- ok(5, ! defined $dbh->{lorder}) ;
- ok(6, ! defined $dbh->{reclen}) ;
- ok(7, ! defined $dbh->{bfname}) ;
- $dbh->{bval} = 3000 ;
- ok(8, $dbh->{bval} == 3000 );
- $dbh->{cachesize} = 9000 ;
- ok(9, $dbh->{cachesize} == 9000 );
- $dbh->{psize} = 400 ;
- ok(10, $dbh->{psize} == 400 );
- $dbh->{flags} = 65 ;
- ok(11, $dbh->{flags} == 65 );
- $dbh->{lorder} = 123 ;
- ok(12, $dbh->{lorder} == 123 );
- $dbh->{reclen} = 1234 ;
- ok(13, $dbh->{reclen} == 1234 );
- $dbh->{bfname} = 1234 ;
- ok(14, $dbh->{bfname} == 1234 );
- # Check that an invalid entry is caught both for store & fetch
- eval '$dbh->{fred} = 1234' ;
- ok(15, $@ =~ /^DB_File::RECNOINFO::STORE - Unknown element 'fred' at/ );
- eval 'my $q = $dbh->{fred}' ;
- ok(16, $@ =~ /^DB_File::RECNOINFO::FETCH - Unknown element 'fred' at/ );
- # Now check the interface to RECNOINFO
- my $X ;
- my @h ;
- ok(17, $X = tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $DB_RECNO ) ;
- ok(18, ((stat($Dfile))[2] & 0777) == ($^O eq 'os2' ? 0666 : 0640)
- || $^O eq 'MSWin32' || $^O eq 'amigaos') ;
- #my $l = @h ;
- my $l = $X->length ;
- ok(19, ($FA ? @h == 0 : !$l) );
- my @data = qw( a b c d ever f g h i j k longername m n o p) ;
- $h[0] = shift @data ;
- ok(20, $h[0] eq 'a' );
- my $ i;
- foreach (@data)
- { $h[++$i] = $_ }
- unshift (@data, 'a') ;
- ok(21, defined $h[1] );
- ok(22, ! defined $h[16] );
- ok(23, $FA ? @h == @data : $X->length == @data );
- # Overwrite an entry & check fetch it
- $h[3] = 'replaced' ;
- $data[3] = 'replaced' ;
- ok(24, $h[3] eq 'replaced' );
- #PUSH
- my @push_data = qw(added to the end) ;
- ($FA ? push(@h, @push_data) : $X->push(@push_data)) ;
- push (@data, @push_data) ;
- ok(25, $h[++$i] eq 'added' );
- ok(26, $h[++$i] eq 'to' );
- ok(27, $h[++$i] eq 'the' );
- ok(28, $h[++$i] eq 'end' );
- # POP
- my $popped = pop (@data) ;
- my $value = ($FA ? pop @h : $X->pop) ;
- ok(29, $value eq $popped) ;
- # SHIFT
- $value = ($FA ? shift @h : $X->shift) ;
- my $shifted = shift @data ;
- ok(30, $value eq $shifted );
- # UNSHIFT
- # empty list
- ($FA ? unshift @h : $X->unshift) ;
- ok(31, ($FA ? @h == @data : $X->length == @data ));
- my @new_data = qw(add this to the start of the array) ;
- $FA ? unshift (@h, @new_data) : $X->unshift (@new_data) ;
- unshift (@data, @new_data) ;
- ok(32, $FA ? @h == @data : $X->length == @data );
- ok(33, $h[0] eq "add") ;
- ok(34, $h[1] eq "this") ;
- ok(35, $h[2] eq "to") ;
- ok(36, $h[3] eq "the") ;
- ok(37, $h[4] eq "start") ;
- ok(38, $h[5] eq "of") ;
- ok(39, $h[6] eq "the") ;
- ok(40, $h[7] eq "array") ;
- ok(41, $h[8] eq $data[8]) ;
- # SPLICE
- # Now both arrays should be identical
- my $ok = 1 ;
- my $j = 0 ;
- foreach (@data)
- {
- $ok = 0, last if $_ ne $h[$j ++] ;
- }
- ok(42, $ok );
- # Neagtive subscripts
- # get the last element of the array
- ok(43, $h[-1] eq $data[-1] );
- ok(44, $h[-1] eq $h[ ($FA ? @h : $X->length) -1] );
- # get the first element using a negative subscript
- eval '$h[ - ( $FA ? @h : $X->length)] = "abcd"' ;
- ok(45, $@ eq "" );
- ok(46, $h[0] eq "abcd" );
- # now try to read before the start of the array
- eval '$h[ - (1 + ($FA ? @h : $X->length))] = 1234' ;
- ok(47, $@ =~ '^Modification of non-creatable array value attempted' );
- # IMPORTANT - $X must be undefined before the untie otherwise the
- # underlying DB close routine will not get called.
- undef $X ;
- untie(@h);
- unlink $Dfile;
- {
- # Check bval defaults to n
- my @h = () ;
- my $dbh = new DB_File::RECNOINFO ;
- ok(48, tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $dbh ) ;
- $h[0] = "abc" ;
- $h[1] = "def" ;
- $h[3] = "ghi" ;
- untie @h ;
- my $x = docat($Dfile) ;
- unlink $Dfile;
- ok(49, $x eq "abcndefnnghin") ;
- }
- {
- # Change bval
- my @h = () ;
- my $dbh = new DB_File::RECNOINFO ;
- $dbh->{bval} = "-" ;
- ok(50, tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $dbh ) ;
- $h[0] = "abc" ;
- $h[1] = "def" ;
- $h[3] = "ghi" ;
- untie @h ;
- my $x = docat($Dfile) ;
- unlink $Dfile;
- my $ok = ($x eq "abc-def--ghi-") ;
- bad_one() unless $ok ;
- ok(51, $ok) ;
- }
- {
- # Check R_FIXEDLEN with default bval (space)
- my @h = () ;
- my $dbh = new DB_File::RECNOINFO ;
- $dbh->{flags} = R_FIXEDLEN ;
- $dbh->{reclen} = 5 ;
- ok(52, tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $dbh ) ;
- $h[0] = "abc" ;
- $h[1] = "def" ;
- $h[3] = "ghi" ;
- untie @h ;
- my $x = docat($Dfile) ;
- unlink $Dfile;
- my $ok = ($x eq "abc def ghi ") ;
- bad_one() unless $ok ;
- ok(53, $ok) ;
- }
- {
- # Check R_FIXEDLEN with user-defined bval
- my @h = () ;
- my $dbh = new DB_File::RECNOINFO ;
- $dbh->{flags} = R_FIXEDLEN ;
- $dbh->{bval} = "-" ;
- $dbh->{reclen} = 5 ;
- ok(54, tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $dbh ) ;
- $h[0] = "abc" ;
- $h[1] = "def" ;
- $h[3] = "ghi" ;
- untie @h ;
- my $x = docat($Dfile) ;
- unlink $Dfile;
- my $ok = ($x eq "abc--def-------ghi--") ;
- bad_one() unless $ok ;
- ok(55, $ok) ;
- }
- {
- # check that attempting to tie an associative array to a DB_RECNO will fail
- my $filename = "xyz" ;
- my %x ;
- eval { tie %x, 'DB_File', $filename, O_RDWR|O_CREAT, 0640, $DB_RECNO ; } ;
- ok(56, $@ =~ /^DB_File can only tie an array to a DB_RECNO database/) ;
- unlink $filename ;
- }
- {
- # sub-class test
- package Another ;
- use warnings ;
- use strict ;
- open(FILE, ">SubDB.pm") or die "Cannot open SubDB.pm: $!n" ;
- print FILE <<'EOM' ;
- package SubDB ;
- use warnings ;
- use strict ;
- use vars qw( @ISA @EXPORT) ;
- require Exporter ;
- use DB_File;
- @ISA=qw(DB_File);
- @EXPORT = @DB_File::EXPORT ;
- sub STORE {
- my $self = shift ;
- my $key = shift ;
- my $value = shift ;
- $self->SUPER::STORE($key, $value * 2) ;
- }
- sub FETCH {
- my $self = shift ;
- my $key = shift ;
- $self->SUPER::FETCH($key) - 1 ;
- }
- sub put {
- my $self = shift ;
- my $key = shift ;
- my $value = shift ;
- $self->SUPER::put($key, $value * 3) ;
- }
- sub get {
- my $self = shift ;
- $self->SUPER::get($_[0], $_[1]) ;
- $_[1] -= 2 ;
- }
- sub A_new_method
- {
- my $self = shift ;
- my $key = shift ;
- my $value = $self->FETCH($key) ;
- return "[[$value]]" ;
- }
- 1 ;
- EOM
- close FILE ;
- BEGIN { push @INC, '.'; }
- eval 'use SubDB ; ';
- main::ok(57, $@ eq "") ;
- my @h ;
- my $X ;
- eval '
- $X = tie(@h, "SubDB","recno.tmp", O_RDWR|O_CREAT, 0640, $DB_RECNO );
- ' ;
- main::ok(58, $@ eq "") ;
- my $ret = eval '$h[3] = 3 ; return $h[3] ' ;
- main::ok(59, $@ eq "") ;
- main::ok(60, $ret == 5) ;
- my $value = 0;
- $ret = eval '$X->put(1, 4) ; $X->get(1, $value) ; return $value' ;
- main::ok(61, $@ eq "") ;
- main::ok(62, $ret == 10) ;
- $ret = eval ' R_NEXT eq main::R_NEXT ' ;
- main::ok(63, $@ eq "" ) ;
- main::ok(64, $ret == 1) ;
- $ret = eval '$X->A_new_method(1) ' ;
- main::ok(65, $@ eq "") ;
- main::ok(66, $ret eq "[[11]]") ;
- undef $X;
- untie(@h);
- unlink "SubDB.pm", "recno.tmp" ;
- }
- {
- # test $#
- my $self ;
- unlink $Dfile;
- ok(67, $self = tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $DB_RECNO ) ;
- $h[0] = "abc" ;
- $h[1] = "def" ;
- $h[2] = "ghi" ;
- $h[3] = "jkl" ;
- ok(68, $FA ? $#h == 3 : $self->length() == 4) ;
- undef $self ;
- untie @h ;
- my $x = docat($Dfile) ;
- ok(69, $x eq "abcndefnghinjkln") ;
- # $# sets array to same length
- ok(70, $self = tie @h, 'DB_File', $Dfile, O_RDWR, 0640, $DB_RECNO ) ;
- if ($FA)
- { $#h = 3 }
- else
- { $self->STORESIZE(4) }
- ok(71, $FA ? $#h == 3 : $self->length() == 4) ;
- undef $self ;
- untie @h ;
- $x = docat($Dfile) ;
- ok(72, $x eq "abcndefnghinjkln") ;
- # $# sets array to bigger
- ok(73, $self = tie @h, 'DB_File', $Dfile, O_RDWR, 0640, $DB_RECNO ) ;
- if ($FA)
- { $#h = 6 }
- else
- { $self->STORESIZE(7) }
- ok(74, $FA ? $#h == 6 : $self->length() == 7) ;
- undef $self ;
- untie @h ;
- $x = docat($Dfile) ;
- ok(75, $x eq "abcndefnghinjklnnnn") ;
- # $# sets array smaller
- ok(76, $self = tie @h, 'DB_File', $Dfile, O_RDWR, 0640, $DB_RECNO ) ;
- if ($FA)
- { $#h = 2 }
- else
- { $self->STORESIZE(3) }
- ok(77, $FA ? $#h == 2 : $self->length() == 3) ;
- undef $self ;
- untie @h ;
- $x = docat($Dfile) ;
- ok(78, $x eq "abcndefnghin") ;
- unlink $Dfile;
- }
- {
- # DBM Filter tests
- use warnings ;
- use strict ;
- my (@h, $db) ;
- my ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- unlink $Dfile;
- sub checkOutput
- {
- my($fk, $sk, $fv, $sv) = @_ ;
- return
- $fetch_key eq $fk && $store_key eq $sk &&
- $fetch_value eq $fv && $store_value eq $sv &&
- $_ eq 'original' ;
- }
-
- ok(79, $db = tie(@h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $DB_RECNO ) );
- $db->filter_fetch_key (sub { $fetch_key = $_ }) ;
- $db->filter_store_key (sub { $store_key = $_ }) ;
- $db->filter_fetch_value (sub { $fetch_value = $_}) ;
- $db->filter_store_value (sub { $store_value = $_ }) ;
- $_ = "original" ;
- $h[0] = "joe" ;
- # fk sk fv sv
- ok(80, checkOutput( "", 0, "", "joe")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(81, $h[0] eq "joe");
- # fk sk fv sv
- ok(82, checkOutput( "", 0, "joe", "")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(83, $db->FIRSTKEY() == 0) ;
- # fk sk fv sv
- ok(84, checkOutput( 0, "", "", "")) ;
- # replace the filters, but remember the previous set
- my ($old_fk) = $db->filter_fetch_key
- (sub { ++ $_ ; $fetch_key = $_ }) ;
- my ($old_sk) = $db->filter_store_key
- (sub { $_ *= 2 ; $store_key = $_ }) ;
- my ($old_fv) = $db->filter_fetch_value
- (sub { $_ = "[$_]"; $fetch_value = $_ }) ;
- my ($old_sv) = $db->filter_store_value
- (sub { s/o/x/g; $store_value = $_ }) ;
-
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- $h[1] = "Joe" ;
- # fk sk fv sv
- ok(85, checkOutput( "", 2, "", "Jxe")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(86, $h[1] eq "[Jxe]");
- # fk sk fv sv
- ok(87, checkOutput( "", 2, "[Jxe]", "")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(88, $db->FIRSTKEY() == 1) ;
- # fk sk fv sv
- ok(89, checkOutput( 1, "", "", "")) ;
-
- # put the original filters back
- $db->filter_fetch_key ($old_fk);
- $db->filter_store_key ($old_sk);
- $db->filter_fetch_value ($old_fv);
- $db->filter_store_value ($old_sv);
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- $h[0] = "joe" ;
- ok(90, checkOutput( "", 0, "", "joe")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(91, $h[0] eq "joe");
- ok(92, checkOutput( "", 0, "joe", "")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(93, $db->FIRSTKEY() == 0) ;
- ok(94, checkOutput( 0, "", "", "")) ;
- # delete the filters
- $db->filter_fetch_key (undef);
- $db->filter_store_key (undef);
- $db->filter_fetch_value (undef);
- $db->filter_store_value (undef);
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- $h[0] = "joe" ;
- ok(95, checkOutput( "", "", "", "")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(96, $h[0] eq "joe");
- ok(97, checkOutput( "", "", "", "")) ;
- ($fetch_key, $store_key, $fetch_value, $store_value) = ("") x 4 ;
- ok(98, $db->FIRSTKEY() == 0) ;
- ok(99, checkOutput( "", "", "", "")) ;
- undef $db ;
- untie @h;
- unlink $Dfile;
- }
- {
- # DBM Filter with a closure
- use warnings ;
- use strict ;
- my (@h, $db) ;
- unlink $Dfile;
- ok(100, $db = tie(@h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $DB_RECNO ) );
- my %result = () ;
- sub Closure
- {
- my ($name) = @_ ;
- my $count = 0 ;
- my @kept = () ;
- return sub { ++$count ;
- push @kept, $_ ;
- $result{$name} = "$name - $count: [@kept]" ;
- }
- }
- $db->filter_store_key(Closure("store key")) ;
- $db->filter_store_value(Closure("store value")) ;
- $db->filter_fetch_key(Closure("fetch key")) ;
- $db->filter_fetch_value(Closure("fetch value")) ;
- $_ = "original" ;
- $h[0] = "joe" ;
- ok(101, $result{"store key"} eq "store key - 1: [0]");
- ok(102, $result{"store value"} eq "store value - 1: [joe]");
- ok(103, ! defined $result{"fetch key"} );
- ok(104, ! defined $result{"fetch value"} );
- ok(105, $_ eq "original") ;
- ok(106, $db->FIRSTKEY() == 0 ) ;
- ok(107, $result{"store key"} eq "store key - 1: [0]");
- ok(108, $result{"store value"} eq "store value - 1: [joe]");
- ok(109, $result{"fetch key"} eq "fetch key - 1: [0]");
- ok(110, ! defined $result{"fetch value"} );
- ok(111, $_ eq "original") ;
- $h[7] = "john" ;
- ok(112, $result{"store key"} eq "store key - 2: [0 7]");
- ok(113, $result{"store value"} eq "store value - 2: [joe john]");
- ok(114, $result{"fetch key"} eq "fetch key - 1: [0]");
- ok(115, ! defined $result{"fetch value"} );
- ok(116, $_ eq "original") ;
- ok(117, $h[0] eq "joe");
- ok(118, $result{"store key"} eq "store key - 3: [0 7 0]");
- ok(119, $result{"store value"} eq "store value - 2: [joe john]");
- ok(120, $result{"fetch key"} eq "fetch key - 1: [0]");
- ok(121, $result{"fetch value"} eq "fetch value - 1: [joe]");
- ok(122, $_ eq "original") ;
- undef $db ;
- untie @h;
- unlink $Dfile;
- }
- {
- # DBM Filter recursion detection
- use warnings ;
- use strict ;
- my (@h, $db) ;
- unlink $Dfile;
- ok(123, $db = tie(@h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0640, $DB_RECNO ) );
- $db->filter_store_key (sub { $_ = $h[0] }) ;
- eval '$h[1] = 1234' ;
- ok(124, $@ =~ /^recursion detected in filter_store_key at/ );
-
- undef $db ;
- untie @h;
- unlink $Dfile;
- }
- {
- # Examples from the POD
- my $file = "xyzt" ;
- {
- my $redirect = new Redirect $file ;
- use warnings FATAL => qw(all);
- use strict ;
- use DB_File ;
- my $filename = "text" ;
- unlink $filename ;
- my @h ;
- my $x = tie @h, "DB_File", $filename, O_RDWR|O_CREAT, 0640, $DB_RECNO
- or die "Cannot open file 'text': $!n" ;
- # Add a few key/value pairs to the file
- $h[0] = "orange" ;
- $h[1] = "blue" ;
- $h[2] = "yellow" ;
- $FA ? push @h, "green", "black"
- : $x->push("green", "black") ;
- my $elements = $FA ? scalar @h : $x->length ;
- print "The array contains $elements entriesn" ;
- my $last = $FA ? pop @h : $x->pop ;
- print "popped $lastn" ;
- $FA ? unshift @h, "white"
- : $x->unshift("white") ;
- my $first = $FA ? shift @h : $x->shift ;
- print "shifted $firstn" ;
- # Check for existence of a key
- print "Element 1 Exists with value $h[1]n" if $h[1] ;
- # use a negative index
- print "The last element is $h[-1]n" ;
- print "The 2nd last element is $h[-2]n" ;
- undef $x ;
- untie @h ;
- unlink $filename ;
- }
- ok(125, docat_del($file) eq <<'EOM') ;
- The array contains 5 entries
- popped black
- shifted white
- Element 1 Exists with value blue
- The last element is green
- The 2nd last element is yellow
- EOM
- my $save_output = "xyzt" ;
- {
- my $redirect = new Redirect $save_output ;
- use warnings FATAL => qw(all);
- use strict ;
- use vars qw(@h $H $file $i) ;
- use DB_File ;
- use Fcntl ;
-
- $file = "text" ;
- unlink $file ;
- $H = tie @h, "DB_File", $file, O_RDWR|O_CREAT, 0640, $DB_RECNO
- or die "Cannot open file $file: $!n" ;
-
- # first create a text file to play with
- $h[0] = "zero" ;
- $h[1] = "one" ;
- $h[2] = "two" ;
- $h[3] = "three" ;
- $h[4] = "four" ;
-
- # Print the records in order.
- #
- # The length method is needed here because evaluating a tied
- # array in a scalar context does not return the number of
- # elements in the array.
- print "nORIGINALn" ;
- foreach $i (0 .. $H->length - 1) {
- print "$i: $h[$i]n" ;
- }
- # use the push & pop methods
- $a = $H->pop ;
- $H->push("last") ;
- print "nThe last record was [$a]n" ;
- # and the shift & unshift methods
- $a = $H->shift ;
- $H->unshift("first") ;
- print "The first record was [$a]n" ;
- # Use the API to add a new record after record 2.
- $i = 2 ;
- $H->put($i, "Newbie", R_IAFTER) ;
- # and a new record before record 1.
- $i = 1 ;
- $H->put($i, "New One", R_IBEFORE) ;
- # delete record 3
- $H->del(3) ;
- # now print the records in reverse order
- print "nREVERSEn" ;
- for ($i = $H->length - 1 ; $i >= 0 ; -- $i)
- { print "$i: $h[$i]n" }
- # same again, but use the API functions instead
- print "nREVERSE againn" ;
- my ($s, $k, $v) = (0, 0, 0) ;
- for ($s = $H->seq($k, $v, R_LAST) ;
- $s == 0 ;
- $s = $H->seq($k, $v, R_PREV))
- { print "$k: $vn" }
- undef $H ;
- untie @h ;
- unlink $file ;
- }
- ok(126, docat_del($save_output) eq <<'EOM') ;
- ORIGINAL
- 0: zero
- 1: one
- 2: two
- 3: three
- 4: four
- The last record was [four]
- The first record was [zero]
- REVERSE
- 5: last
- 4: three
- 3: Newbie
- 2: one
- 1: New One
- 0: first
- REVERSE again
- 5: last
- 4: three
- 3: Newbie
- 2: one
- 1: New One
- 0: first
- EOM
-
- }
- {
- # Bug ID 20001013.009
- #
- # test that $hash{KEY} = undef doesn't produce the warning
- # Use of uninitialized value in null operation
- use warnings ;
- use strict ;
- use DB_File ;
- unlink $Dfile;
- my @h ;
- my $a = "";
- local $SIG{__WARN__} = sub {$a = $_[0]} ;
-
- tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0664, $DB_RECNO
- or die "Can't open file: $!n" ;
- $h[0] = undef;
- ok(127, $a eq "") ;
- untie @h ;
- unlink $Dfile;
- }
- {
- # test that %hash = () doesn't produce the warning
- # Argument "" isn't numeric in entersub
- use warnings ;
- use strict ;
- use DB_File ;
- my $a = "";
- local $SIG{__WARN__} = sub {$a = $_[0]} ;
- unlink $Dfile;
- my @h ;
-
- tie @h, 'DB_File', $Dfile, O_RDWR|O_CREAT, 0664, $DB_RECNO
- or die "Can't open file: $!n" ;
- @h = (); ;
- ok(128, $a eq "") ;
- untie @h ;
- unlink $Dfile;
- }
- exit ;