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use strict; |
use strict; |
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use Carp; |
use Carp; |
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use File::Glob qw(:globally :nocase); |
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use Data::Dumper; |
use Data::Dumper; |
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BEGIN { |
BEGIN { |
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use Exporter (); |
use Exporter (); |
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use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); |
use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); |
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$VERSION = 0.01; |
$VERSION = 0.07; |
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@ISA = qw (Exporter); |
@ISA = qw (Exporter); |
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#Give a hoot don't pollute, do not export more than needed by default |
#Give a hoot don't pollute, do not export more than needed by default |
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@EXPORT = qw (); |
@EXPORT = qw (); |
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=head1 NAME |
=head1 NAME |
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IsisDB - Read CDS/ISIS database |
IsisDB - Read CDS/ISIS, WinISIS and IsisMarc database |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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use IsisDB |
use IsisDB; |
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my $isis = new IsisDB( |
my $isis = new IsisDB( |
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isisdb => './cds/cds', |
isisdb => './cds/cds', |
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); |
); |
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for(my $mfn = 1; $mfn <= $isis->{'maxmfn'}; $mfn++) { |
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print $isis->to_ascii($mfn),"\n"; |
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} |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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This module will read CDS/ISIS databases and create hash values out of it. |
This module will read ISIS databases created by DOS CDS/ISIS, WinIsis or |
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It can be used as perl-only alternative to OpenIsis module. |
IsisMarc. It can be used as perl-only alternative to OpenIsis module. |
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It can create hash values from data in ISIS database (using C<to_hash>), |
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ASCII dump (using C<to_ascii>) or just hash with field names and packed |
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values (like C<^asomething^belse>). |
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Unique feature of this module is ability to C<include_deleted> records. |
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It will also skip zero sized fields (OpenIsis has a bug in XS bindings, so |
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fields which are zero sized will be filled with random junk from memory). |
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It also has support for identifiers (only if ISIS database is created by |
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IsisMarc), see C<to_hash>. |
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This will module will always be slower than OpenIsis module which use C |
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library. However, since it's written in perl, it's platform independent (so |
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you don't need C compiler), and can be easily modified. I hope that it |
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creates data structures which are easier to use than ones created by |
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OpenIsis, so reduced time in other parts of the code should compensate for |
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slower performance of this module (speed of reading ISIS database is |
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rarely an issue). |
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=head1 METHODS |
=head1 METHODS |
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# some binary reads |
# some binary reads |
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# |
# |
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sub Read32 { |
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my $self = shift; |
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my $f = shift || die "Read32 needs file handle"; |
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read($$f,$b,4) || die "can't read 4 bytes from $$f from position ".tell($f); |
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return unpack("l",$b); |
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} |
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=head2 new |
=head2 new |
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Open CDS/ISIS database |
Open ISIS database |
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my $isis = new IsisDB( |
my $isis = new IsisDB( |
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isisdb => './cds/cds', |
isisdb => './cds/cds', |
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read_fdt => 1, |
read_fdt => 1, |
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include_deleted => 1, |
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hash_filter => sub { |
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my $v = shift; |
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$v =~ s#foo#bar#g; |
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}, |
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debug => 1, |
debug => 1, |
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); |
); |
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Options are described below: |
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=over 5 |
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=item isisdb |
=item isisdb |
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Prefix path to CDS/ISIS. It should contain full or relative path to database |
This is full or relative path to ISIS database files which include |
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and common prefix of C<.FDT>, C<.MST>, C<.CNT>, C<.XRF> and C<.MST> files. |
common prefix of C<.MST>, and C<.XRF> and optionally C<.FDT> (if using |
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C<read_fdt> option) files. |
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In this example it uses C<./cds/cds.MST> and related files. |
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=item read_fdt |
=item read_fdt |
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Boolean flag to specify if field definition table should be read. It's off |
Boolean flag to specify if field definition table should be read. It's off |
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by default. |
by default. |
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=item include_deleted |
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Don't skip logically deleted records in ISIS. |
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=item hash_filter |
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Filter code ref which will be used before data is converted to hash. |
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=item debug |
=item debug |
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Dump a C<lot> of debugging output. |
Dump a B<lot> of debugging output. |
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=back |
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It will also set C<$isis-E<gt>{'maxmfn'}> which is maximum MFN stored in database. |
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=cut |
=cut |
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my $self = {}; |
my $self = {}; |
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bless($self, $class); |
bless($self, $class); |
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$self->{isisdb} = {@_}->{isisdb} || croak "new needs database name as argument!"; |
croak "new needs database name (isisdb) as argument!" unless ({@_}->{isisdb}); |
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foreach my $v (qw{isisdb debug include_deleted hash_filter}) { |
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$self->{$v} = {@_}->{$v}; |
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} |
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my @isis_files = grep(/\.(FDT|MST|XRF|CNT)$/i,glob($self->{isisdb}."*")); |
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$self->{debug} = {@_}->{debug} || 1; # XXX remove debug always! |
foreach my $f (@isis_files) { |
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my $ext = $1 if ($f =~ m/\.(\w\w\w)$/); |
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$self->{lc($ext)."_file"} = $f; |
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} |
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my @must_exist = qw(mst xrf); |
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push @must_exist, "fdt" if ($self->{read_fdt}); |
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foreach my $ext (@must_exist) { |
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croak "missing ",uc($ext)," file in ",$self->{isisdb} unless ($self->{$ext."_file"}); |
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} |
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print STDERR "## using files: ",join(" ",@isis_files),"\n" if ($self->{debug}); |
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# if you want to read .FDT file use read_fdt argument when creating class! |
# if you want to read .FDT file use read_fdt argument when creating class! |
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if ({@_}->{read_fdt} && -e $self->{isisdb}.".FDT") { |
if ($self->{read_fdt} && -e $self->{fdt_file}) { |
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# read the $db.FDT file for tags |
# read the $db.FDT file for tags |
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my $fieldzone=0; |
my $fieldzone=0; |
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open(fileFDT, $self->{isisdb}.".FDT") || croak "can't read '$self->{isisdb}.FDT': $!"; |
open(fileFDT, $self->{fdt_file}) || croak "can't read '$self->{fdt_file}': $!"; |
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while (<fileFDT>) { |
while (<fileFDT>) { |
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chomp; |
chomp; |
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# Get the Maximum MFN from $db.MST |
# Get the Maximum MFN from $db.MST |
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open(fileMST,$self->{isisdb}.".MST") || croak "can't read '$self->{isisdb}.MST': $!"; |
open($self->{'fileMST'}, $self->{mst_file}) || croak "can't open '$self->{mst_file}': $!"; |
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# MST format: (* = 32 bit signed) |
# MST format: (* = 32 bit signed) |
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# CTLMFN* always 0 |
# CTLMFN* always 0 |
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# NXTMFB* last block allocated to master file |
# NXTMFB* last block allocated to master file |
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# NXTMFP offset to next available position in last block |
# NXTMFP offset to next available position in last block |
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# MFTYPE always 0 for user db file (1 for system) |
# MFTYPE always 0 for user db file (1 for system) |
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seek(fileMST,4,0); |
seek($self->{'fileMST'},4,0); |
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$self->{'NXTMFN'}=$self->Read32(\*fileMST) || carp "NXTNFN is zero"; |
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my $buff; |
197 |
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close(fileMST); |
read($self->{'fileMST'}, $buff, 4); |
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$self->{'NXTMFN'}=unpack("l",$buff) || carp "NXTNFN is zero"; |
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# save maximum MFN |
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$self->{'maxmfn'} = $self->{'NXTMFN'} - 1; |
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print STDERR Dumper($self),"\n" if ($self->{debug}); |
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# open files for later |
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open($self->{'fileXRF'}, $self->{xrf_file}) || croak "can't open '$self->{xrf_file}': $!"; |
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$self ? return $self : return undef; |
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} |
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=head2 read_cnt |
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This function is not really used by module, but can be useful to find info |
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about your index (if debugging it for example). |
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print Dumper($isis->read_cnt); |
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=cut |
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sub read_cnt { |
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my $self = shift; |
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croak "missing CNT file in ",$self->{isisdb} unless ($self->{cnt_file}); |
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# Get the index information from $db.CNT |
# Get the index information from $db.CNT |
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open(fileCNT, $self->{isisdb}.".CNT") || croak "can't read '$self->{isisdb}.CNT': $!"; |
open(fileCNT, $self->{cnt_file}) || croak "can't read '$self->{cnt_file}': $!"; |
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# There is two 26 Bytes fixed lenght records |
# There is two 26 Bytes fixed lenght records |
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my $buff = shift || return; |
my $buff = shift || return; |
253 |
my @arr = unpack("ssssssllls", $buff); |
my @arr = unpack("ssssssllls", $buff); |
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print STDERR "unpack_cnt: ",join(" ",@arr),"\n" if ($self->{'debug'}); |
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my $IDTYPE = shift @arr; |
my $IDTYPE = shift @arr; |
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foreach (@flds) { |
foreach (@flds) { |
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$self->{$IDTYPE}->{$_} = abs(shift @arr); |
$self->{cnt}->{$IDTYPE}->{$_} = abs(shift @arr); |
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} |
} |
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} |
} |
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my $buff; |
my $buff; |
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read(fileCNT, $buff, 26); |
read(fileCNT, $buff, 26); |
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$self->unpack_cnt($buff); |
$self->unpack_cnt($buff); |
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read(fileCNT, $buff, 26); |
read(fileCNT, $buff, 26); |
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$self->unpack_cnt($buff); |
$self->unpack_cnt($buff); |
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close(fileCNT); |
close(fileCNT); |
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print Dumper($self) if ($self->{debug}); |
return $self->{cnt}; |
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$self ? return $self : return undef; |
|
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} |
} |
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=head2 fetch |
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Read record with selected MFN |
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my $rec = $isis->fetch(55); |
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# Get a record from the MFN |
Returns hash with keys which are field names and values are unpacked values |
283 |
# Return the number of fields in the record. |
for that field like this: |
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# Return -1 if the record is marked for deletion |
|
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# The record is then extracted with call to GETs |
$rec = { |
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'210' => [ '^aNew York^cNew York University press^dcop. 1988' ], |
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'990' => [ '2140', '88', 'HAY' ], |
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}; |
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=cut |
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sub GetMFN { |
sub fetch { |
293 |
my $self = shift; |
my $self = shift; |
294 |
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295 |
my $mfn = shift || croak "GetMFN needs MFN as argument!"; |
my $mfn = shift || croak "fetch needs MFN as argument!"; |
296 |
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297 |
print "GetMFN: $mfn\n" if ($self->{debug}); |
# is mfn allready in memory? |
298 |
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my $old_mfn = $self->{'current_mfn'} || -1; |
299 |
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return if ($mfn == $old_mfn); |
300 |
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301 |
open(fileXRF, $self->{isisdb}.".XRF") || croak "can't open '$self->{isisdb}.XRF': $!"; |
print STDERR "## fetch: $mfn\n" if ($self->{debug}); |
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|
303 |
# XXX check this? |
# XXX check this? |
304 |
my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
305 |
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|
306 |
print "seeking to $mfnpos in file '$self->{isisdb}.XRF'\n" if ($self->{debug}); |
print STDERR "## seeking to $mfnpos in file '$self->{xrf_file}'\n" if ($self->{debug}); |
307 |
seek(fileXRF,$mfnpos,0); |
seek($self->{'fileXRF'},$mfnpos,0); |
308 |
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309 |
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my $buff; |
310 |
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311 |
# read XRFMFB abd XRFMFP |
# read XRFMFB abd XRFMFP |
312 |
my $pointer=$self->Read32(\*fileXRF); |
read($self->{'fileXRF'}, $buff, 4); |
313 |
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my $pointer=unpack("l",$buff) || carp "pointer is null"; |
314 |
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315 |
my $XRFMFB = int($pointer/2048); |
my $XRFMFB = int($pointer/2048); |
316 |
my $XRFMFP = $pointer - ($XRFMFB*2048); |
my $XRFMFP = $pointer - ($XRFMFB*2048); |
317 |
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print "XRFMFB: $XRFMFB XRFMFP: $XRFMFP\n" if ($self->{debug}); |
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318 |
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319 |
# XXX fix this to be more readable!! |
# (XRFMFB - 1) * 512 + XRFMFP |
320 |
# e.g. (XRFMFB - 1) * 512 + XRFMFP |
# why do i have to do XRFMFP % 1024 ? |
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my $offset = $pointer; |
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my $offset2=int($offset/2048)-1; |
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my $offset22=int($offset/4096); |
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my $offset3=$offset-($offset22*4096); |
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if ($offset3>512) { |
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$offset3=$offset3-2048; |
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} |
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my $offset4=($offset2*512)+$offset3; |
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322 |
print "$offset - $offset2 - $offset3 - $offset4\n" if ($self->{debug}); |
my $blk_off = (($XRFMFB - 1) * 512) + ($XRFMFP % 1024); |
323 |
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|
324 |
close(fileXRF); |
print STDERR "## pointer: $pointer XRFMFB: $XRFMFB XRFMFP: $XRFMFP offset: $blk_off\n" if ($self->{'debug'}); |
325 |
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|
326 |
# Get Record Information |
# Get Record Information |
327 |
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328 |
open(fileMST, $self->{isisdb}.".MST") || croak "can't open '$self->{isisdb}.MST': $!"; |
seek($self->{'fileMST'},$blk_off,0); |
329 |
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330 |
seek(fileMST,$offset4,0); |
read($self->{'fileMST'}, $buff, 4); |
331 |
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my $value=unpack("l",$buff); |
332 |
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333 |
my $value=$self->Read32(\*fileMST); |
print STDERR "## offset for rowid $value is $blk_off (blk $XRFMFB off $XRFMFP)\n" if ($self->{debug}); |
334 |
|
|
335 |
if ($value!=$mfn) { |
if ($value!=$mfn) { |
336 |
print ("Error: The MFN:".$mfn." is not found in MST(".$value.")"); |
carp "Error: MFN ".$mfn." not found in MST(".$value.")"; |
337 |
return -1; # XXX deleted record? |
#return; # XXX deleted record? |
338 |
} |
} |
339 |
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|
340 |
# $MFRL=$self->Read16($fileMST); |
# $MFRL=$self->Read16($fileMST); |
344 |
# $NVF=$self->Read16($fileMST); |
# $NVF=$self->Read16($fileMST); |
345 |
# $STATUS=$self->Read16($fileMST); |
# $STATUS=$self->Read16($fileMST); |
346 |
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347 |
my $buff; |
read($self->{'fileMST'}, $buff, 14); |
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read(fileMST, $buff, 14); |
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348 |
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349 |
my ($MFRL,$MFBWB,$MFBWP,$BASE,$NVF,$STATUS) = unpack("slssss", $buff); |
my ($MFRL,$MFBWB,$MFBWP,$BASE,$NVF,$STATUS) = unpack("slssss", $buff); |
350 |
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351 |
print "MFRL: $MFRL MFBWB: $MFBWB MFBWP: $MFBWP BASE: $BASE NVF: $NVF STATUS: $STATUS\n" if ($self->{debug}); |
print STDERR "## MFRL: $MFRL MFBWB: $MFBWB MFBWP: $MFBWP BASE: $BASE NVF: $NVF STATUS: $STATUS\n" if ($self->{debug}); |
352 |
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|
353 |
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# delete old record |
354 |
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delete $self->{record}; |
355 |
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356 |
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## FIXME this is a bug |
357 |
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if (! $self->{'include_deleted'} && $MFRL < 0) { |
358 |
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print "## logically deleted record $mfn, skipping...\n" if ($self->{debug}); |
359 |
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return; |
360 |
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} |
361 |
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362 |
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warn "BASE is not 18+6*NVF" unless ($BASE == 18 + 6 * $NVF); |
363 |
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|
364 |
# Get Directory Format |
# Get Directory Format |
365 |
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367 |
my @FieldLEN; |
my @FieldLEN; |
368 |
my @FieldTAG; |
my @FieldTAG; |
369 |
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370 |
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read($self->{'fileMST'}, $buff, 6 * $NVF); |
371 |
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372 |
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my $rec_len = 0; |
373 |
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374 |
for (my $i = 0 ; $i < $NVF ; $i++) { |
for (my $i = 0 ; $i < $NVF ; $i++) { |
375 |
|
|
376 |
# $TAG=$self->Read16($fileMST); |
# $TAG=$self->Read16($fileMST); |
377 |
# $POS=$self->Read16($fileMST); |
# $POS=$self->Read16($fileMST); |
378 |
# $LEN=$self->Read16($fileMST); |
# $LEN=$self->Read16($fileMST); |
379 |
|
|
380 |
read(fileMST, $buff, 6); |
my ($TAG,$POS,$LEN) = unpack("sss", substr($buff,$i * 6, 6)); |
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my ($TAG,$POS,$LEN) = unpack("sss", $buff); |
|
381 |
|
|
382 |
print "TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
print STDERR "## TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
383 |
|
|
384 |
# The TAG does not exists in .FDT so we set it to 0. |
# The TAG does not exists in .FDT so we set it to 0. |
385 |
# |
# |
394 |
push @FieldTAG,$TAG; |
push @FieldTAG,$TAG; |
395 |
push @FieldPOS,$POS; |
push @FieldPOS,$POS; |
396 |
push @FieldLEN,$LEN; |
push @FieldLEN,$LEN; |
397 |
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|
398 |
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$rec_len += $LEN; |
399 |
} |
} |
400 |
|
|
401 |
# Get Variable Fields |
# Get Variable Fields |
402 |
|
|
403 |
|
read($self->{'fileMST'},$buff,$rec_len); |
404 |
|
|
405 |
|
print STDERR "## rec_len: $rec_len poc: ",tell($self->{'fileMST'})."\n" if ($self->{debug}); |
406 |
|
|
407 |
for (my $i = 0 ; $i < $NVF ; $i++) { |
for (my $i = 0 ; $i < $NVF ; $i++) { |
408 |
my $rec; |
# skip zero-sized fields |
409 |
read(fileMST,$rec,$FieldLEN[$i]); |
next if ($FieldLEN[$i] == 0); |
|
$self->{record}->{$FieldTAG[$i]} = $rec; |
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} |
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close(fileMST); |
|
410 |
|
|
411 |
# The record is marked for deletion |
push @{$self->{record}->{$FieldTAG[$i]}}, substr($buff,$FieldPOS[$i],$FieldLEN[$i]); |
|
if ($STATUS==1) { |
|
|
return -1; |
|
412 |
} |
} |
413 |
|
|
414 |
print Dumper($self) if ($self->{debug}); |
$self->{'current_mfn'} = $mfn; |
415 |
|
|
416 |
|
print Dumper($self),"\n" if ($self->{debug}); |
417 |
|
|
418 |
return $NVF; |
return $self->{'record'}; |
419 |
} |
} |
420 |
|
|
421 |
=begin php |
=head2 to_ascii |
422 |
|
|
423 |
# Load the dictionary from the $db.L0x files. |
Dump ASCII output of record with specified MFN |
|
# Not usefull Yet |
|
|
|
|
|
sub LoadDictionary() |
|
|
{ |
|
|
$fileL01=fopen($self->{isisdb}.".L01","r"); |
|
|
rewind($fileL01); |
|
|
|
|
|
do |
|
|
{ |
|
|
|
|
|
$POS=$self->Read32($fileL01); |
|
|
$OCK=$self->Read16($fileL01); |
|
|
$IT=$self->Read16($fileL01); |
|
|
$PS=$self->Read32($fileL01); |
|
|
print "<br>PS:".$PS." ".$self->{ORDF}->{1}." "; |
|
|
for ($i=0;$i<$OCK;$i++) |
|
|
{ |
|
|
$KEY=fread($fileL01,10); |
|
|
|
|
|
print $KEY." ### "; |
|
|
|
|
|
$INFO1=$self->Read32($fileL01); |
|
|
$INFO2=$self->Read32($fileL01); |
|
|
|
|
|
#L01Key->{$key}=array($INFO1,$INFO2); |
|
|
} |
|
|
|
|
|
rewind($fileL01); |
|
|
$offset=($PS-1)*(12+$self->{ORDF}->{1}*18*2); |
|
|
fseek($fileL01,$offset); |
|
424 |
|
|
425 |
} While (!feof($fileL01)); |
print $isis->to_ascii(42); |
426 |
|
|
427 |
fclose($fileL01); |
It outputs something like this: |
|
} |
|
428 |
|
|
429 |
# self function search through the tree and returns an array of pointers to IFP |
210 ^aNew York^cNew York University press^dcop. 1988 |
430 |
# The function must be recursive |
990 2140 |
431 |
|
990 88 |
432 |
|
990 HAY |
433 |
|
|
434 |
sub SearchTree($search,$fileNB,$PUNT) |
If C<read_fdt> is specified when calling C<new> it will display field names |
435 |
{ |
from C<.FDT> file instead of numeric tags. |
|
$offset=(($PUNT-1)*(8+2*$self->{ORDN}->{1}*14)); |
|
|
|
|
|
rewind($fileNB1); |
|
|
|
|
|
fseek($fileNB,$offset); |
|
|
|
|
|
$POS=$self->Read32($fileNB); |
|
|
$OCK=$self->Read16($fileNB); |
|
|
$IT=$self->Read16($fileNB); |
|
|
|
|
|
#print "<br>".$POS." - ".$OCK." - ".$IT; |
|
|
|
|
|
$OLDPUNT=$POS; |
|
|
$j=0; |
|
|
for ($i=0;$i<$OCK;$i++) |
|
|
{ |
|
|
$KEY=fread($fileNB,10); |
|
|
|
|
|
$PUNT=$self->Read32($fileNB); |
|
|
|
|
|
#print " ## ".chop($KEY)."(".$PUNT."-".$OLDPUNT.") ## "; |
|
|
|
|
|
If (strcmp($search,chop($KEY))<0) |
|
|
{ |
|
|
break; |
|
|
} |
|
|
$OLDPUNT=$PUNT; |
|
|
} |
|
|
#print $OLDPUNT; |
|
|
Return $OLDPUNT; |
|
|
} |
|
436 |
|
|
437 |
# Search ISIS for record containing search |
=cut |
|
# Return a sorted array of MFN |
|
438 |
|
|
439 |
sub Search($search) |
sub to_ascii { |
440 |
{ |
my $self = shift; |
441 |
|
|
442 |
$search=strtoupper($search); |
my $mfn = shift || croak "need MFN"; |
|
#print "Searching....".$search." - ".$self->{POSRX}->{1}."<br>"; |
|
|
# first search .x01 |
|
|
|
|
|
|
|
|
# Search in .N01 |
|
|
|
|
|
|
|
|
$fileN01=fopen($self->{isisdb}.".N01","r"); |
|
|
$offset=(($self->{POSRX}->{1}-1)*(8+2*$self->{ORDN}->{1}*14)); |
|
|
|
|
|
do |
|
|
{ |
|
|
rewind($fileN01); |
|
|
|
|
|
fseek($fileN01,$offset); |
|
|
|
|
|
$POS=$self->Read32($fileN01); |
|
|
$OCK=$self->Read16($fileN01); |
|
|
$IT=$self->Read16($fileN01); |
|
|
|
|
|
#print "<br>".$POS." - ".$OCK." - ".$IT; |
|
|
|
|
|
$OLDPUNT=$POS; |
|
|
for ($i=0;$i<$OCK;$i++) |
|
|
{ |
|
|
$KEY=fread($fileN01,10); |
|
|
|
|
|
$PUNT=$self->Read32($fileN01); |
|
|
|
|
|
#print " ## ".chop($KEY)."(".$PUNT."-".$OLDPUNT.") ## "; |
|
|
|
|
|
If (strcmp($search,chop($KEY))<0) |
|
|
{ |
|
|
break; |
|
|
} |
|
|
$OLDPUNT=$PUNT; |
|
|
} |
|
|
$offset=(($OLDPUNT-1)*(8+2*$self->{ORDN}->{1}*14)); |
|
|
} while ($OLDPUNT>0); |
|
|
#print $OLDPUNT; |
|
|
|
|
|
|
|
|
fclose($fileN01); |
|
|
|
|
|
# Now look for records in .L01 file |
|
|
$fileL01=fopen($self->{isisdb}.".L01","r"); |
|
|
rewind($fileL01); |
|
|
|
|
|
$offset=(-$OLDPUNT-1)*(12+$self->{ORDF}->{1}*18*2); |
|
|
fseek($fileL01,$offset); |
|
|
|
|
|
$POS=$self->Read32($fileL01); |
|
|
$OCK=$self->Read16($fileL01); |
|
|
$IT=$self->Read16($fileL01); |
|
|
$PS=$self->Read32($fileL01); |
|
|
#print "<br>POS:".$POS." ".$self->{ORDF}->{1}." "; |
|
|
for ($i=0;$i<$OCK;$i++) |
|
|
{ |
|
|
$KEY=fread($fileL01,10); |
|
|
|
|
|
#print $KEY." ### "; |
|
|
|
|
|
$INFO1=$self->Read32($fileL01); |
|
|
$INFO2=$self->Read32($fileL01); |
|
|
|
|
|
If (strcmp($search,chop($KEY))==0) |
|
|
{ |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
fclose($fileL01); |
|
|
|
|
|
#print $INFO1."--".$INFO2; |
|
|
|
|
|
# Now look in .IFP for the MFN |
|
|
$fileIFP=fopen($self->{isisdb}.".IFP","r"); |
|
|
rewind($fileIFP); |
|
|
$offset=($INFO1-1)*512+($INFO2*4); |
|
|
fseek($fileIFP,$offset); |
|
|
|
|
|
$IFPBLK=$self->Read32($fileIFP); |
|
|
|
|
|
$IFPNXTB=$self->Read32($fileIFP); |
|
|
$IFPNXTP=$self->Read32($fileIFP); |
|
|
$IFPTOTP=$self->Read32($fileIFP); |
|
|
$IFPSEGP=$self->Read32($fileIFP); |
|
|
$IFPSEGC=$self->Read32($fileIFP); |
|
|
|
|
|
|
|
|
#print "<br>IFP:".$IFPBLK." # ".$IFPNXTB." - ".$IFPNXTP." - ".$IFPTOTP." - ".$IFPSEGP." - ".$IFPSEGC; |
|
|
|
|
|
rewind($fileIFP); |
|
|
$offset=($INFO1-1)*512+24+($INFO2*4); |
|
|
fseek($fileIFP,$offset); |
|
|
|
|
|
$j=24+($INFO2*4); |
|
|
$k=0; |
|
|
$l=1; |
|
|
$OLDPMFN=""; |
|
|
for ($i=0;$i<$IFPSEGP;$i++) |
|
|
{ |
|
|
$B1=$self->Read8($fileIFP); |
|
|
$B2=$self->Read8($fileIFP); |
|
|
$B3=$self->Read8($fileIFP); |
|
|
$B4=$self->Read8($fileIFP); |
|
|
$B5=$self->Read8($fileIFP); |
|
|
$B6=$self->Read8($fileIFP); |
|
|
$B7=$self->Read8($fileIFP); |
|
|
$B8=$self->Read8($fileIFP); |
|
|
|
|
|
$PMFN=$B1*65536+$B2*256+$B3; |
|
|
$PTAG=$B4*256+$B5; |
|
|
$POCC=$B6; |
|
|
$PCNT=$B7*256+$B8; |
|
|
|
|
|
if ($OLDPMFN!=$PMFN) |
|
|
{ |
|
|
if ($PMFN!=0) |
|
|
{ |
|
|
$self->{MFNArray}->{$l}=$PMFN; |
|
|
$OLDPMFN=$PMFN; |
|
|
$l+=1; |
|
|
} |
|
|
} |
|
|
|
|
|
$j=$j+8; |
|
|
#print "<br>".$PMFN."-".$PTAG." - ".$POCC." - ".$PCNT; |
|
|
#print "@@".$j."@@@@"; |
|
|
if ($j>=504) |
|
|
{ |
|
|
if ($IFPNXTB==0 && $IFPNXTP==0) |
|
|
{ |
|
|
$k=$k+1; |
|
|
rewind($fileIFP); |
|
|
$offset=($INFO1-1+$k)*512; |
|
|
fseek($fileIFP,$offset); |
|
|
$B=$self->Read32($fileIFP); |
|
|
#print "<br>-".$B."-<br>"; |
|
|
$j=0; |
|
|
} else |
|
|
{ |
|
|
rewind($fileIFP); |
|
|
$offset=($IFPNXTB-1)*512; |
|
|
fseek($fileIFP,$offset); |
|
|
|
|
|
$OLDIFPNXTB=$IFPNXTB; |
|
|
$OLDIFPNXTP=$IFPNXTP; |
|
|
|
|
|
$IFPBLK=$self->Read32($fileIFP); |
|
|
|
|
|
$IFPNXTB=$self->Read32($fileIFP); |
|
|
$IFPNXTP=$self->Read32($fileIFP); |
|
|
$IFPTOTP=$self->Read32($fileIFP); |
|
|
$IFPSEGP=$self->Read32($fileIFP); |
|
|
$IFPSEGC=$self->Read32($fileIFP); |
|
|
|
|
|
rewind($fileIFP); |
|
|
$offset=($OLDIFPNXTB-1)*512+24+($OLDIFPNXTP*4); |
|
|
fseek($fileIFP,$offset); |
|
|
|
|
|
$j=24+($OLDIFPNXTP*4); |
|
|
$k=0; |
|
|
$j=0; |
|
|
} |
|
|
} |
|
|
|
|
|
} |
|
|
fclose($fileIFP); |
|
|
return $l-1; |
|
|
} |
|
443 |
|
|
444 |
=cut |
my $rec = $self->fetch($mfn); |
445 |
|
|
446 |
# |
my $out = "0\t$mfn"; |
|
# XXX porting from php left-over: |
|
|
# |
|
|
# do I *REALLY* need those methods, or should I use |
|
|
# $self->{something} directly? |
|
|
# |
|
|
# Probably direct usage is better! |
|
|
# |
|
447 |
|
|
448 |
sub GetFieldName { |
foreach my $f (sort keys %{$rec}) { |
449 |
my $self = shift; |
my $fn = $self->tag_name($f); |
450 |
return $self->{FieldName}; |
$out .= "\n$fn\t".join("\n$fn\t",@{$self->{record}->{$f}}); |
451 |
} |
} |
452 |
|
|
453 |
sub GetTagName { |
$out .= "\n"; |
|
my $self = shift; |
|
|
return $self->{TagName}; |
|
|
} |
|
454 |
|
|
455 |
sub GetFieldTag { |
return $out; |
|
my $self = shift; |
|
|
return $self->{FieldTAG}; |
|
456 |
} |
} |
457 |
|
|
458 |
sub GetNextMFN { |
=head2 to_hash |
|
my $self = shift; |
|
|
return $self->{NXTMFN}; |
|
|
} |
|
459 |
|
|
460 |
sub GetMFNArray { |
Read record with specified MFN and convert it to hash |
|
my $self = shift; |
|
|
return $self->{MFNArray}; |
|
|
} |
|
|
=begin php |
|
461 |
|
|
462 |
sub Read32($fileNB) |
my $hash = $isis->to_hash($mfn); |
|
{ |
|
|
$B1=ord(fread($fileNB,1)); |
|
|
$B2=ord(fread($fileNB,1)); |
|
|
$B3=ord(fread($fileNB,1)); |
|
|
$B4=ord(fread($fileNB,1)); |
|
|
|
|
|
if ($B4<=128) |
|
|
{ |
|
|
$value=$B1+$B2*256+$B3*65536+$B4*16777216; |
|
|
} else |
|
|
{ |
|
|
$value=$self->Not8($B1)+$self->Not8($B2)*256+$self->Not8($B3)*65536+$self->Not8($B4)*16777216; |
|
|
$value=-($value+1); |
|
|
} |
|
|
# print "(".$B1.",".$B2.",".$B3.",".$B4.":".$value.")"; |
|
463 |
|
|
464 |
return $value; |
It has ability to convert characters (using C<hash_filter> from ISIS |
465 |
} |
database before creating structures enabling character re-mapping or quick |
466 |
|
fix-up of data. |
467 |
|
|
468 |
|
This function returns hash which is like this: |
469 |
|
|
470 |
|
$hash = { |
471 |
|
'210' => [ |
472 |
|
{ |
473 |
|
'c' => 'New York University press', |
474 |
|
'a' => 'New York', |
475 |
|
'd' => 'cop. 1988' |
476 |
|
} |
477 |
|
], |
478 |
|
'990' => [ |
479 |
|
'2140', |
480 |
|
'88', |
481 |
|
'HAY' |
482 |
|
], |
483 |
|
}; |
484 |
|
|
485 |
|
You can later use that hash to produce any output from ISIS data. |
486 |
|
|
487 |
|
If database is created using IsisMarc, it will also have to special fields |
488 |
|
which will be used for identifiers, C<i1> and C<i2> like this: |
489 |
|
|
490 |
|
'200' => [ |
491 |
|
{ |
492 |
|
'i1' => '1', |
493 |
|
'i2' => ' ' |
494 |
|
'a' => 'Goa', |
495 |
|
'f' => 'Valdo D\'Arienzo', |
496 |
|
'e' => 'tipografie e tipografi nel XVI secolo', |
497 |
|
} |
498 |
|
], |
499 |
|
|
500 |
sub Read24($fileNB) |
This method will also create additional field C<000> with MFN. |
|
{ |
|
|
$B1=ord(fread($fileNB,1)); |
|
|
$B2=ord(fread($fileNB,1)); |
|
|
$B3=ord(fread($fileNB,1)); |
|
501 |
|
|
502 |
$value=$B1+$B2*256+$B3*65536; |
=cut |
503 |
|
|
504 |
# print "(".$B1.",".$B2.",".$B3.":".$value.")"; |
sub to_hash { |
505 |
|
my $self = shift; |
506 |
|
|
507 |
return $value; |
my $mfn = shift || confess "need mfn!"; |
|
} |
|
508 |
|
|
509 |
sub Read16($fileNB) |
# init record to include MFN as field 000 |
510 |
{ |
my $rec = { '000' => [ $mfn ] }; |
|
$B1=ord(fread($fileNB,1)); |
|
|
$B2=ord(fread($fileNB,1)); |
|
511 |
|
|
512 |
$value=$B1+$B2*256; |
my $row = $self->fetch($mfn); |
|
# print "(".$B1.",".$B2.":".$value.")"; |
|
513 |
|
|
514 |
return $value; |
foreach my $k (keys %{$row}) { |
515 |
} |
foreach my $l (@{$row->{$k}}) { |
516 |
|
|
517 |
sub Read8($fileNB) |
# filter output |
518 |
{ |
$l = $self->{'hash_filter'}->($l) if ($self->{'hash_filter'}); |
|
$B1=ord(fread($fileNB,1)); |
|
519 |
|
|
520 |
$value=$B1; |
my $val; |
|
# print "(".$value.")"; |
|
521 |
|
|
522 |
return $value; |
# has identifiers? |
523 |
} |
($val->{'i1'},$val->{'i2'}) = ($1,$2) if ($l =~ s/^([01 #])([01 #])\^/\^/); |
524 |
|
|
525 |
sub Not8($value) |
# has subfields? |
526 |
{ |
if ($l =~ m/\^/) { |
527 |
$value=decbin($value); |
foreach my $t (split(/\^/,$l)) { |
528 |
if (strlen($value)<8) |
next if (! $t); |
529 |
{ |
$val->{substr($t,0,1)} = substr($t,1); |
530 |
$buffer=""; |
} |
531 |
for($i=0;$i<(8-strlen($value));$i++) |
} else { |
532 |
{ |
$val = $l; |
533 |
$buffer.="0"; |
} |
534 |
} |
|
535 |
$value=$buffer.$value; |
push @{$rec->{$k}}, $val; |
536 |
} |
} |
537 |
$value=ereg_replace("0","3",$value); |
} |
538 |
$value=ereg_replace("1","0",$value); |
|
539 |
$value=ereg_replace("3","1",$value); |
return $rec; |
|
$value=bindec($value); |
|
|
return $value; |
|
|
} |
|
540 |
} |
} |
541 |
|
|
542 |
|
=head2 tag_name |
543 |
|
|
544 |
|
Return name of selected tag |
545 |
|
|
546 |
|
print $isis->tag_name('200'); |
547 |
|
|
548 |
=cut |
=cut |
549 |
|
|
550 |
|
sub tag_name { |
551 |
|
my $self = shift; |
552 |
|
my $tag = shift || return; |
553 |
|
return $self->{'TagName'}->{$tag} || $tag; |
554 |
|
} |
555 |
|
|
556 |
1; |
1; |
|
__END__ |
|
557 |
|
|
558 |
=head1 BUGS |
=head1 BUGS |
559 |
|
|
566 |
dpavlin@rot13.org |
dpavlin@rot13.org |
567 |
http://www.rot13.org/~dpavlin/ |
http://www.rot13.org/~dpavlin/ |
568 |
|
|
569 |
This module is based heavily on code from LIBISIS.PHP - Library to read ISIS files V0.1.1 |
This module is based heavily on code from C<LIBISIS.PHP> library to read ISIS files V0.1.1 |
570 |
written in php and (c) 2000 Franck Martin - <franck@sopac.org> released under LGPL. |
written in php and (c) 2000 Franck Martin <franck@sopac.org> and released under LGPL. |
571 |
|
|
572 |
=head1 COPYRIGHT |
=head1 COPYRIGHT |
573 |
|
|
580 |
|
|
581 |
=head1 SEE ALSO |
=head1 SEE ALSO |
582 |
|
|
583 |
L<http://www.openisis.org|OpenIsis>, perl(1). |
OpenIsis web site L<http://www.openisis.org> |
584 |
|
|
585 |
|
perl4lib site L<http://perl4lib.perl.org> |
586 |
|
|