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package IsisDB; |
package Biblio::Isis; |
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use strict; |
use strict; |
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|
|
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use Carp; |
use Carp; |
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use Data::Dumper; |
use File::Glob qw(:globally :nocase); |
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|
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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 = 0.22_1; |
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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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|
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=head1 NAME |
=head1 NAME |
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|
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IsisDB - Read CDS/ISIS database |
Biblio::Isis - Read CDS/ISIS, WinISIS and IsisMarc database |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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use IsisDB |
use Biblio::Isis; |
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my $isis = new IsisDB( |
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my $isis = new Biblio::Isis( |
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isisdb => './cds/cds', |
isisdb => './cds/cds', |
| 29 |
); |
); |
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for(my $mfn = 1; $mfn <= $isis->count; $mfn++) { |
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print $isis->to_ascii($mfn),"\n"; |
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} |
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|
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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|
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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 which |
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seems to depriciate it's old C<XS> bindings for perl. |
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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 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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|
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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 Biblio::Isis( |
| 83 |
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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join_subfields_with => ' ; ', |
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); |
); |
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Options are described below: |
Options are described below: |
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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 |
| 101 |
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 |
| 109 |
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 |
| 116 |
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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 even at level 1. For even more increase level. |
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=back |
=item join_subfields_with |
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Define delimiter which will be used to join repeatable subfields. This |
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option is included to support lagacy application written against version |
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older than 0.21 of this module. By default, it disabled. See L</to_hash>. |
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It will also set C<$isis-E<gt>{'maxmfn'}> which is maximum MFN stored in database. |
=back |
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=cut |
=cut |
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my $self = {}; |
my $self = {}; |
| 136 |
bless($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 $v (qw{isisdb debug include_deleted hash_filter}) { |
| 141 |
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$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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foreach my $f (@isis_files) { |
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my $ext = $1 if ($f =~ m/\.(\w\w\w)$/); |
| 148 |
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$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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| 154 |
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foreach my $ext (@must_exist) { |
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unless ($self->{$ext."_file"}) { |
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carp "missing ",uc($ext)," file in ",$self->{isisdb}; |
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return; |
| 158 |
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} |
| 159 |
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} |
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$self->{debug} = {@_}->{debug}; |
if ($self->{debug}) { |
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print STDERR "## using files: ",join(" ",@isis_files),"\n"; |
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eval "use Data::Dump"; |
| 164 |
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| 165 |
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if (! $@) { |
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*Dumper = *Data::Dump::dump; |
| 167 |
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} else { |
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use Data::Dumper; |
| 169 |
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} |
| 170 |
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} |
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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! |
| 173 |
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(my $fileFDT, $self->{fdt_file}) || croak "can't read '$self->{fdt_file}': $!"; |
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binmode($fileFDT); |
| 180 |
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|
| 181 |
while (<fileFDT>) { |
while (<$fileFDT>) { |
| 182 |
chomp; |
chomp; |
| 183 |
if ($fieldzone) { |
if ($fieldzone) { |
| 184 |
my $name=substr($_,0,30); |
my $name=substr($_,0,30); |
| 195 |
} |
} |
| 196 |
} |
} |
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close(fileFDT); |
close($fileFDT); |
| 199 |
} |
} |
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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}': $!"; |
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binmode($self->{'fileMST'}); |
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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) |
| 212 |
seek(fileMST,4,0); |
seek($self->{'fileMST'},4,0) || croak "can't seek to offset 0 in MST: $!"; |
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$self->{'NXTMFN'}=$self->Read32(\*fileMST) || carp "NXTNFN is zero"; |
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# save maximum MFN |
my $buff; |
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$self->{'maxmfn'} = $self->{'NXTMFN'} - 1; |
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close(fileMST); |
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# Get the index information from $db.CNT |
read($self->{'fileMST'}, $buff, 4) || croak "can't read NXTMFN from MST: $!"; |
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$self->{'NXTMFN'}=unpack("V",$buff) || croak "NXTNFN is zero"; |
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open(fileCNT, $self->{isisdb}.".CNT") || croak "can't read '$self->{isisdb}.CNT': $!"; |
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# There is two 26 Bytes fixed lenght records |
print STDERR "## self ",Dumper($self),"\n" if ($self->{debug}); |
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# 0: IDTYPE BTree type 16 |
# open files for later |
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# 2: ORDN Nodes Order 16 |
open($self->{'fileXRF'}, $self->{xrf_file}) || croak "can't open '$self->{xrf_file}': $!"; |
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# 4: ORDF Leafs Order 16 |
binmode($self->{'fileXRF'}); |
|
# 6: N Number of Memory buffers for nodes 16 |
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# 8: K Number of buffers for first level index 16 |
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# 10: LIV Current number of Index Levels 16 |
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# 12: POSRX* Pointer to Root Record in N0x 32 |
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# 16: NMAXPOS* Next Available position in N0x 32 |
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# 20: FMAXPOS* Next available position in L0x 32 |
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# 24: ABNORMAL Formal BTree normality indicator 16 |
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# length: 26 bytes |
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sub unpack_cnt { |
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my $self = shift; |
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my @flds = qw(ORDN ORDF N K LIV POSRX NMAXPOS FMAXPOS ABNORMAL); |
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my $buff = shift || return; |
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my @arr = unpack("ssssssllls", $buff); |
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my $IDTYPE = shift @arr; |
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foreach (@flds) { |
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$self->{$IDTYPE}->{$_} = abs(shift @arr); |
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} |
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} |
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my $buff; |
$self ? return $self : return undef; |
| 226 |
read(fileCNT, $buff, 26); |
} |
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$self->unpack_cnt($buff); |
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read(fileCNT, $buff, 26); |
=head2 count |
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$self->unpack_cnt($buff); |
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Return number of records in database |
| 231 |
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close(fileCNT); |
print $isis->count; |
| 233 |
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print Dumper($self) if ($self->{debug}); |
=cut |
| 235 |
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| 236 |
$self ? return $self : return undef; |
sub count { |
| 237 |
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my $self = shift; |
| 238 |
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return $self->{'NXTMFN'} - 1; |
| 239 |
} |
} |
| 240 |
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=head2 GetMFN |
=head2 fetch |
| 242 |
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|
| 243 |
Read record with selected MFN |
Read record with selected MFN |
| 244 |
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| 245 |
my $rec = $isis->GetMFN(55); |
my $rec = $isis->fetch(55); |
| 246 |
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|
| 247 |
Returns hash with keys which are field names and values are unpacked values |
Returns hash with keys which are field names and values are unpacked values |
| 248 |
for that field. |
for that field like this: |
| 249 |
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|
| 250 |
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$rec = { |
| 251 |
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'210' => [ '^aNew York^cNew York University press^dcop. 1988' ], |
| 252 |
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'990' => [ '2140', '88', 'HAY' ], |
| 253 |
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}; |
| 254 |
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|
| 255 |
=cut |
=cut |
| 256 |
|
|
| 257 |
sub GetMFN { |
sub fetch { |
| 258 |
my $self = shift; |
my $self = shift; |
| 259 |
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|
| 260 |
my $mfn = shift || croak "GetMFN needs MFN as argument!"; |
my $mfn = shift || croak "fetch needs MFN as argument!"; |
| 261 |
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|
| 262 |
print "GetMFN: $mfn\n" if ($self->{debug}); |
# is mfn allready in memory? |
| 263 |
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my $old_mfn = $self->{'current_mfn'} || -1; |
| 264 |
|
return $self->{record} if ($mfn == $old_mfn); |
| 265 |
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|
| 266 |
open(fileXRF, $self->{isisdb}.".XRF") || croak "can't open '$self->{isisdb}.XRF': $!"; |
print STDERR "## fetch: $mfn\n" if ($self->{debug}); |
| 267 |
|
|
| 268 |
# XXX check this? |
# XXX check this? |
| 269 |
my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
| 270 |
|
|
| 271 |
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 ($self->{debug}); |
| 272 |
seek(fileXRF,$mfnpos,0); |
seek($self->{'fileXRF'},$mfnpos,0); |
| 273 |
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|
| 274 |
# read XRFMFB abd XRFMFP |
my $buff; |
|
my $pointer=$self->Read32(\*fileXRF); |
|
| 275 |
|
|
| 276 |
my $XRFMFB = int($pointer/2048); |
# delete old record |
| 277 |
my $XRFMFP = $pointer - ($XRFMFB*2048); |
delete $self->{record}; |
| 278 |
|
|
| 279 |
print "XRFMFB: $XRFMFB XRFMFP: $XRFMFP\n" if ($self->{debug}); |
# read XRFMFB abd XRFMFP |
| 280 |
|
read($self->{'fileXRF'}, $buff, 4); |
| 281 |
|
my $pointer=unpack("V",$buff); |
| 282 |
|
if (! $pointer) { |
| 283 |
|
if ($self->{include_deleted}) { |
| 284 |
|
return; |
| 285 |
|
} else { |
| 286 |
|
warn "pointer for MFN $mfn is null\n"; |
| 287 |
|
return; |
| 288 |
|
} |
| 289 |
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} |
| 290 |
|
|
| 291 |
# XXX fix this to be more readable!! |
# check for logically deleted record |
| 292 |
# e.g. (XRFMFB - 1) * 512 + XRFMFP |
if ($pointer & 0x80000000) { |
| 293 |
|
print STDERR "## record $mfn is logically deleted\n" if ($self->{debug}); |
| 294 |
|
$self->{deleted} = $mfn; |
| 295 |
|
|
| 296 |
my $offset = $pointer; |
return unless $self->{include_deleted}; |
| 297 |
my $offset2=int($offset/2048)-1; |
|
| 298 |
my $offset22=int($offset/4096); |
# abs |
| 299 |
my $offset3=$offset-($offset22*4096); |
$pointer = ($pointer ^ 0xffffffff) + 1; |
|
if ($offset3>512) { |
|
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$offset3=$offset3-2048; |
|
| 300 |
} |
} |
|
my $offset4=($offset2*512)+$offset3; |
|
| 301 |
|
|
| 302 |
print "$offset - $offset2 - $offset3 - $offset4\n" if ($self->{debug}); |
my $XRFMFB = int($pointer/2048); |
| 303 |
|
my $XRFMFP = $pointer - ($XRFMFB*2048); |
| 304 |
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|
| 305 |
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# (XRFMFB - 1) * 512 + XRFMFP |
| 306 |
|
# why do i have to do XRFMFP % 1024 ? |
| 307 |
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|
| 308 |
|
my $blk_off = (($XRFMFB - 1) * 512) + ($XRFMFP % 512); |
| 309 |
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|
| 310 |
close(fileXRF); |
print STDERR "## pointer: $pointer XRFMFB: $XRFMFB XRFMFP: $XRFMFP offset: $blk_off\n" if ($self->{'debug'}); |
| 311 |
|
|
| 312 |
# Get Record Information |
# Get Record Information |
| 313 |
|
|
| 314 |
open(fileMST, $self->{isisdb}.".MST") || croak "can't open '$self->{isisdb}.MST': $!"; |
seek($self->{'fileMST'},$blk_off,0) || croak "can't seek to $blk_off: $!"; |
| 315 |
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|
| 316 |
seek(fileMST,$offset4,0); |
read($self->{'fileMST'}, $buff, 4) || croak "can't read 4 bytes at offset $blk_off from MST file: $!"; |
| 317 |
|
my $value=unpack("V",$buff); |
| 318 |
|
|
| 319 |
my $value=$self->Read32(\*fileMST); |
print STDERR "## offset for rowid $value is $blk_off (blk $XRFMFB off $XRFMFP)\n" if ($self->{debug}); |
| 320 |
|
|
| 321 |
if ($value!=$mfn) { |
if ($value!=$mfn) { |
| 322 |
print ("Error: The MFN:".$mfn." is not found in MST(".$value.")"); |
if ($value == 0) { |
| 323 |
return -1; # XXX deleted record? |
print STDERR "## record $mfn is physically deleted\n" if ($self->{debug}); |
| 324 |
|
$self->{deleted} = $mfn; |
| 325 |
|
return; |
| 326 |
|
} |
| 327 |
|
|
| 328 |
|
carp "Error: MFN ".$mfn." not found in MST file, found $value"; |
| 329 |
|
return; |
| 330 |
} |
} |
| 331 |
|
|
| 332 |
# $MFRL=$self->Read16($fileMST); |
read($self->{'fileMST'}, $buff, 14); |
|
# $MFBWB=$self->Read32($fileMST); |
|
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# $MFBWP=$self->Read16($fileMST); |
|
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# $BASE=$self->Read16($fileMST); |
|
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# $NVF=$self->Read16($fileMST); |
|
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# $STATUS=$self->Read16($fileMST); |
|
| 333 |
|
|
| 334 |
my $buff; |
my ($MFRL,$MFBWB,$MFBWP,$BASE,$NVF,$STATUS) = unpack("vVvvvv", $buff); |
| 335 |
read(fileMST, $buff, 14); |
|
| 336 |
|
print STDERR "## MFRL: $MFRL MFBWB: $MFBWB MFBWP: $MFBWP BASE: $BASE NVF: $NVF STATUS: $STATUS\n" if ($self->{debug}); |
| 337 |
|
|
| 338 |
my ($MFRL,$MFBWB,$MFBWP,$BASE,$NVF,$STATUS) = unpack("slssss", $buff); |
warn "MFRL $MFRL is not even number" unless ($MFRL % 2 == 0); |
| 339 |
|
|
| 340 |
print "MFRL: $MFRL MFBWB: $MFBWB MFBWP: $MFBWP BASE: $BASE NVF: $NVF STATUS: $STATUS\n" if ($self->{debug}); |
warn "BASE is not 18+6*NVF" unless ($BASE == 18 + 6 * $NVF); |
| 341 |
|
|
| 342 |
# Get Directory Format |
# Get Directory Format |
| 343 |
|
|
| 345 |
my @FieldLEN; |
my @FieldLEN; |
| 346 |
my @FieldTAG; |
my @FieldTAG; |
| 347 |
|
|
| 348 |
for (my $i = 0 ; $i < $NVF ; $i++) { |
read($self->{'fileMST'}, $buff, 6 * $NVF); |
| 349 |
|
|
| 350 |
|
my $rec_len = 0; |
| 351 |
|
|
| 352 |
# $TAG=$self->Read16($fileMST); |
for (my $i = 0 ; $i < $NVF ; $i++) { |
|
# $POS=$self->Read16($fileMST); |
|
|
# $LEN=$self->Read16($fileMST); |
|
| 353 |
|
|
| 354 |
read(fileMST, $buff, 6); |
my ($TAG,$POS,$LEN) = unpack("vvv", substr($buff,$i * 6, 6)); |
|
my ($TAG,$POS,$LEN) = unpack("sss", $buff); |
|
| 355 |
|
|
| 356 |
print "TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
print STDERR "## TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
| 357 |
|
|
| 358 |
# 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. |
| 359 |
# |
# |
| 368 |
push @FieldTAG,$TAG; |
push @FieldTAG,$TAG; |
| 369 |
push @FieldPOS,$POS; |
push @FieldPOS,$POS; |
| 370 |
push @FieldLEN,$LEN; |
push @FieldLEN,$LEN; |
| 371 |
|
|
| 372 |
|
$rec_len += $LEN; |
| 373 |
} |
} |
| 374 |
|
|
| 375 |
# Get Variable Fields |
# Get Variable Fields |
| 376 |
|
|
| 377 |
delete $self->{record}; |
read($self->{'fileMST'},$buff,$rec_len); |
| 378 |
|
|
| 379 |
|
print STDERR "## rec_len: $rec_len poc: ",tell($self->{'fileMST'})."\n" if ($self->{debug}); |
| 380 |
|
|
| 381 |
for (my $i = 0 ; $i < $NVF ; $i++) { |
for (my $i = 0 ; $i < $NVF ; $i++) { |
| 382 |
my $rec; |
# skip zero-sized fields |
| 383 |
read(fileMST,$rec,$FieldLEN[$i]); |
next if ($FieldLEN[$i] == 0); |
|
push @{$self->{record}->{$FieldTAG[$i]}}, $rec; |
|
|
} |
|
|
close(fileMST); |
|
| 384 |
|
|
| 385 |
# The record is marked for deletion |
push @{$self->{record}->{$FieldTAG[$i]}}, substr($buff,$FieldPOS[$i],$FieldLEN[$i]); |
|
if ($STATUS==1) { |
|
|
return -1; |
|
| 386 |
} |
} |
| 387 |
|
|
| 388 |
print Dumper($self) if ($self->{debug}); |
$self->{'current_mfn'} = $mfn; |
| 389 |
|
|
| 390 |
|
print STDERR Dumper($self),"\n" if ($self->{debug}); |
| 391 |
|
|
| 392 |
return $self->{'record'}; |
return $self->{'record'}; |
| 393 |
} |
} |
| 394 |
|
|
| 395 |
|
=head2 mfn |
| 396 |
|
|
| 397 |
|
Returns current MFN position |
| 398 |
|
|
| 399 |
|
my $mfn = $isis->mfn; |
| 400 |
|
|
| 401 |
|
=cut |
| 402 |
|
|
| 403 |
|
# This function should be simple return $self->{current_mfn}, |
| 404 |
|
# but if new is called with _hack_mfn it becomes setter. |
| 405 |
|
# It's useful in tests when setting $isis->{record} directly |
| 406 |
|
|
| 407 |
|
sub mfn { |
| 408 |
|
my $self = shift; |
| 409 |
|
return $self->{current_mfn}; |
| 410 |
|
}; |
| 411 |
|
|
| 412 |
|
|
| 413 |
=head2 to_ascii |
=head2 to_ascii |
| 414 |
|
|
| 415 |
Dump ascii output of selected MFN |
Returns ASCII output of record with specified MFN |
| 416 |
|
|
| 417 |
print $isis->to_ascii(55); |
print $isis->to_ascii(42); |
| 418 |
|
|
| 419 |
|
This outputs something like this: |
| 420 |
|
|
| 421 |
|
210 ^aNew York^cNew York University press^dcop. 1988 |
| 422 |
|
990 2140 |
| 423 |
|
990 88 |
| 424 |
|
990 HAY |
| 425 |
|
|
| 426 |
|
If C<read_fdt> is specified when calling C<new> it will display field names |
| 427 |
|
from C<.FDT> file instead of numeric tags. |
| 428 |
|
|
| 429 |
=cut |
=cut |
| 430 |
|
|
| 433 |
|
|
| 434 |
my $mfn = shift || croak "need MFN"; |
my $mfn = shift || croak "need MFN"; |
| 435 |
|
|
| 436 |
my $rec = $self->GetMFN($mfn); |
my $rec = $self->fetch($mfn) || return; |
| 437 |
|
|
| 438 |
my $out = "0\t$mfn"; |
my $out = "0\t$mfn"; |
| 439 |
|
|
| 440 |
foreach my $f (sort keys %{$rec}) { |
foreach my $f (sort keys %{$rec}) { |
| 441 |
$out .= "\n$f\t".join("\n$f\t",@{$self->{record}->{$f}}); |
my $fn = $self->tag_name($f); |
| 442 |
|
$out .= "\n$fn\t".join("\n$fn\t",@{$self->{record}->{$f}}); |
| 443 |
} |
} |
| 444 |
|
|
| 445 |
$out .= "\n"; |
$out .= "\n"; |
| 447 |
return $out; |
return $out; |
| 448 |
} |
} |
| 449 |
|
|
| 450 |
################# old cruft which is not ported from php to perl |
=head2 to_hash |
| 451 |
|
|
| 452 |
=begin php |
Read record with specified MFN and convert it to hash |
| 453 |
|
|
| 454 |
# Load the dictionary from the $db.L0x files. |
my $hash = $isis->to_hash($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,$offset); |
|
| 455 |
|
|
| 456 |
} While (!feof($fileL01)); |
It has ability to convert characters (using C<hash_filter>) from ISIS |
| 457 |
|
database before creating structures enabling character re-mapping or quick |
| 458 |
|
fix-up of data. |
| 459 |
|
|
| 460 |
fclose($fileL01); |
This function returns hash which is like this: |
|
} |
|
| 461 |
|
|
| 462 |
# self function search through the tree and returns an array of pointers to IFP |
$hash = { |
| 463 |
# The function must be recursive |
'210' => [ |
| 464 |
|
{ |
| 465 |
|
'c' => 'New York University press', |
| 466 |
|
'a' => 'New York', |
| 467 |
|
'd' => 'cop. 1988' |
| 468 |
|
} |
| 469 |
|
], |
| 470 |
|
'990' => [ |
| 471 |
|
'2140', |
| 472 |
|
'88', |
| 473 |
|
'HAY' |
| 474 |
|
], |
| 475 |
|
}; |
| 476 |
|
|
| 477 |
sub SearchTree($search,$fileNB,$PUNT) |
You can later use that hash to produce any output from ISIS data. |
|
{ |
|
|
$offset=(($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 $OLDPUNT; |
|
|
} |
|
| 478 |
|
|
| 479 |
# Search ISIS for record containing search |
If database is created using IsisMarc, it will also have to special fields |
| 480 |
# Return a sorted array of MFN |
which will be used for identifiers, C<i1> and C<i2> like this: |
| 481 |
|
|
| 482 |
sub Search($search) |
'200' => [ |
| 483 |
{ |
{ |
| 484 |
|
'i1' => '1', |
| 485 |
|
'i2' => ' ' |
| 486 |
|
'a' => 'Goa', |
| 487 |
|
'f' => 'Valdo D\'Arienzo', |
| 488 |
|
'e' => 'tipografie e tipografi nel XVI secolo', |
| 489 |
|
} |
| 490 |
|
], |
| 491 |
|
|
| 492 |
$search=strtoupper($search); |
In case there are repeatable subfields in record, this will create |
| 493 |
#print "Searching....".$search." - ".$self->{POSRX}->{1}."<br>"; |
following structure: |
|
# 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; |
|
|
} |
|
| 494 |
|
|
| 495 |
=cut |
'900' => [ { |
| 496 |
|
'a' => [ 'foo', 'bar', 'baz' ], |
| 497 |
|
}] |
| 498 |
|
|
| 499 |
# |
Or in more complex example of |
|
# XXX porting from php left-over: |
|
|
# |
|
|
# do I *REALLY* need those methods, or should I use |
|
|
# $self->{something} directly? |
|
|
# |
|
|
# Probably direct usage is better! |
|
|
# |
|
| 500 |
|
|
| 501 |
sub GetFieldName { |
902 ^aa1^aa2^aa3^bb1^aa4^bb2^cc1^aa5 |
|
my $self = shift; |
|
|
return $self->{FieldName}; |
|
|
} |
|
| 502 |
|
|
| 503 |
sub GetTagName { |
it will create |
|
my $self = shift; |
|
|
return $self->{TagName}; |
|
|
} |
|
| 504 |
|
|
| 505 |
sub GetFieldTag { |
902 => [ |
| 506 |
my $self = shift; |
{ a => ["a1", "a2", "a3", "a4", "a5"], b => ["b1", "b2"], c => "c1" }, |
| 507 |
return $self->{FieldTAG}; |
], |
| 508 |
} |
|
| 509 |
|
This behaviour can be changed using C<join_subfields_with> option to L</new>, |
| 510 |
|
in which case C<to_hash> will always create single value for each subfield. |
| 511 |
|
This will change result to: |
| 512 |
|
|
| 513 |
|
|
| 514 |
|
|
| 515 |
|
This method will also create additional field C<000> with MFN. |
| 516 |
|
|
| 517 |
|
There is also more elaborative way to call C<to_hash> like this: |
| 518 |
|
|
| 519 |
|
my $hash = $isis->to_hash({ |
| 520 |
|
mfn => 42, |
| 521 |
|
include_subfields => 1, |
| 522 |
|
regexps => [ |
| 523 |
|
's/something/else/g', |
| 524 |
|
], |
| 525 |
|
}); |
| 526 |
|
|
| 527 |
|
Each option controll creation of hash: |
| 528 |
|
|
| 529 |
|
=over 4 |
| 530 |
|
|
| 531 |
|
=item mfn |
| 532 |
|
|
| 533 |
|
Specify MFN number of record |
| 534 |
|
|
| 535 |
|
=item include_subfields |
| 536 |
|
|
| 537 |
sub GetNextMFN { |
This option will create additional key in hash called C<subfields> which will |
| 538 |
|
have original record subfield order and index to that subfield like this: |
| 539 |
|
|
| 540 |
|
902 => [ { |
| 541 |
|
a => ["a1", "a2", "a3", "a4", "a5"], |
| 542 |
|
b => ["b1", "b2"], |
| 543 |
|
c => "c1", |
| 544 |
|
subfields => ["a", 0, "a", 1, "a", 2, "b", 0, "a", 3, "b", 1, "c", 0, "a", 4], |
| 545 |
|
} ], |
| 546 |
|
|
| 547 |
|
=item join_subfields_with |
| 548 |
|
|
| 549 |
|
Define delimiter which will be used to join repeatable subfields. You can |
| 550 |
|
specify option here instead in L</new> if you want to have per-record control. |
| 551 |
|
|
| 552 |
|
=back |
| 553 |
|
|
| 554 |
|
=cut |
| 555 |
|
|
| 556 |
|
sub to_hash { |
| 557 |
my $self = shift; |
my $self = shift; |
| 558 |
return $self->{NXTMFN}; |
|
| 559 |
|
|
| 560 |
|
my $mfn = shift || confess "need mfn!"; |
| 561 |
|
my $arg; |
| 562 |
|
|
| 563 |
|
if (ref($mfn) eq 'HASH') { |
| 564 |
|
$arg = $mfn; |
| 565 |
|
$mfn = $arg->{mfn} || confess "need mfn in arguments"; |
| 566 |
|
} |
| 567 |
|
|
| 568 |
|
confess "regexps must be HASH" if ($arg->{regexps} && ref($arg->{regexps}) ne 'HASH'); |
| 569 |
|
|
| 570 |
|
# init record to include MFN as field 000 |
| 571 |
|
my $rec = { '000' => [ $mfn ] }; |
| 572 |
|
|
| 573 |
|
my $row = $self->fetch($mfn) || return; |
| 574 |
|
|
| 575 |
|
my $j_rs = $arg->{join_subfields_with}; |
| 576 |
|
$j_rs = $self->{join_subfields_with} unless(defined($j_rs)); |
| 577 |
|
my $i_sf = $arg->{include_subfields}; |
| 578 |
|
|
| 579 |
|
foreach my $f_nr (keys %{$row}) { |
| 580 |
|
foreach my $l (@{$row->{$f_nr}}) { |
| 581 |
|
|
| 582 |
|
# filter output |
| 583 |
|
if ($self->{'hash_filter'}) { |
| 584 |
|
$l = $self->{'hash_filter'}->($l); |
| 585 |
|
next unless defined($l); |
| 586 |
|
} |
| 587 |
|
|
| 588 |
|
# apply regexps |
| 589 |
|
if ($arg->{regexps} && defined($arg->{regexps}->{$f_nr})) { |
| 590 |
|
confess "regexps->{$f_nr} must be ARRAY" if (ref($arg->{regexps}->{$f_nr}) ne 'ARRAY'); |
| 591 |
|
my $c = 0; |
| 592 |
|
foreach my $r (@{ $arg->{regexps}->{$f_nr} }) { |
| 593 |
|
while ( eval '$l =~ ' . $r ) { $c++ }; |
| 594 |
|
} |
| 595 |
|
warn "## field $f_nr triggered $c regexpes\n" if ($c && $self->{debug}); |
| 596 |
|
} |
| 597 |
|
|
| 598 |
|
my $val; |
| 599 |
|
my $r_sf; # repeatable subfields in this record |
| 600 |
|
|
| 601 |
|
# has identifiers? |
| 602 |
|
($val->{'i1'},$val->{'i2'}) = ($1,$2) if ($l =~ s/^([01 #])([01 #])\^/\^/); |
| 603 |
|
|
| 604 |
|
# has subfields? |
| 605 |
|
if ($l =~ m/\^/) { |
| 606 |
|
foreach my $t (split(/\^/,$l)) { |
| 607 |
|
next if (! $t); |
| 608 |
|
my ($sf,$v) = (substr($t,0,1), substr($t,1)); |
| 609 |
|
# XXX this might be option, but why? |
| 610 |
|
next unless ($v); |
| 611 |
|
# warn "### $f_nr^$sf:$v",$/ if ($self->{debug} > 1); |
| 612 |
|
|
| 613 |
|
if (ref( $val->{$sf} ) eq 'ARRAY') { |
| 614 |
|
|
| 615 |
|
push @{ $val->{$sf} }, $v; |
| 616 |
|
|
| 617 |
|
# record repeatable subfield it it's offset |
| 618 |
|
push @{ $val->{subfields} }, ( $sf, $#{ $val->{$sf} } ) if (! $j_rs && $i_sf); |
| 619 |
|
$r_sf->{$sf}++; |
| 620 |
|
|
| 621 |
|
} elsif (defined( $val->{$sf} )) { |
| 622 |
|
|
| 623 |
|
# convert scalar field to array |
| 624 |
|
$val->{$sf} = [ $val->{$sf}, $v ]; |
| 625 |
|
|
| 626 |
|
push @{ $val->{subfields} }, ( $sf, 1 ) if (! $j_rs && $i_sf); |
| 627 |
|
$r_sf->{$sf}++; |
| 628 |
|
|
| 629 |
|
} else { |
| 630 |
|
$val->{$sf} = $v; |
| 631 |
|
push @{ $val->{subfields} }, ( $sf, 0 ) if ($i_sf); |
| 632 |
|
} |
| 633 |
|
} |
| 634 |
|
} else { |
| 635 |
|
$val = $l; |
| 636 |
|
} |
| 637 |
|
|
| 638 |
|
if ($j_rs) { |
| 639 |
|
map { |
| 640 |
|
$val->{$_} = join($j_rs, @{ $val->{$_} }); |
| 641 |
|
} keys %$r_sf |
| 642 |
|
} |
| 643 |
|
|
| 644 |
|
push @{$rec->{$f_nr}}, $val; |
| 645 |
|
} |
| 646 |
|
} |
| 647 |
|
|
| 648 |
|
return $rec; |
| 649 |
} |
} |
| 650 |
|
|
| 651 |
sub GetMFNArray { |
=head2 tag_name |
| 652 |
|
|
| 653 |
|
Return name of selected tag |
| 654 |
|
|
| 655 |
|
print $isis->tag_name('200'); |
| 656 |
|
|
| 657 |
|
=cut |
| 658 |
|
|
| 659 |
|
sub tag_name { |
| 660 |
my $self = shift; |
my $self = shift; |
| 661 |
return $self->{MFNArray}; |
my $tag = shift || return; |
| 662 |
|
return $self->{'TagName'}->{$tag} || $tag; |
| 663 |
} |
} |
|
=begin php |
|
| 664 |
|
|
|
sub Read32($fileNB) |
|
|
{ |
|
|
$B1=ord(fread($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.")"; |
|
| 665 |
|
|
| 666 |
return $value; |
=head2 read_cnt |
|
} |
|
| 667 |
|
|
| 668 |
sub Read24($fileNB) |
Read content of C<.CNT> file and return hash containing it. |
|
{ |
|
|
$B1=ord(fread($fileNB,1)); |
|
|
$B2=ord(fread($fileNB,1)); |
|
|
$B3=ord(fread($fileNB,1)); |
|
| 669 |
|
|
| 670 |
$value=$B1+$B2*256+$B3*65536; |
print Dumper($isis->read_cnt); |
| 671 |
|
|
| 672 |
# print "(".$B1.",".$B2.",".$B3.":".$value.")"; |
This function is not used by module (C<.CNT> files are not required for this |
| 673 |
|
module to work), but it can be useful to examine your index (while debugging |
| 674 |
|
for example). |
| 675 |
|
|
| 676 |
return $value; |
=cut |
|
} |
|
| 677 |
|
|
| 678 |
sub Read16($fileNB) |
sub read_cnt { |
| 679 |
{ |
my $self = shift; |
|
$B1=ord(fread($fileNB,1)); |
|
|
$B2=ord(fread($fileNB,1)); |
|
| 680 |
|
|
| 681 |
$value=$B1+$B2*256; |
croak "missing CNT file in ",$self->{isisdb} unless ($self->{cnt_file}); |
|
# print "(".$B1.",".$B2.":".$value.")"; |
|
| 682 |
|
|
| 683 |
return $value; |
# Get the index information from $db.CNT |
| 684 |
} |
|
| 685 |
|
open(my $fileCNT, $self->{cnt_file}) || croak "can't read '$self->{cnt_file}': $!"; |
| 686 |
|
binmode($fileCNT); |
| 687 |
|
|
| 688 |
sub Read8($fileNB) |
my $buff; |
|
{ |
|
|
$B1=ord(fread($fileNB,1)); |
|
| 689 |
|
|
| 690 |
$value=$B1; |
read($fileCNT, $buff, 26) || croak "can't read first table from CNT: $!"; |
| 691 |
# print "(".$value.")"; |
$self->unpack_cnt($buff); |
| 692 |
|
|
| 693 |
return $value; |
read($fileCNT, $buff, 26) || croak "can't read second table from CNT: $!"; |
| 694 |
} |
$self->unpack_cnt($buff); |
| 695 |
|
|
| 696 |
sub Not8($value) |
close($fileCNT); |
| 697 |
{ |
|
| 698 |
$value=decbin($value); |
return $self->{cnt}; |
|
if (strlen($value)<8) |
|
|
{ |
|
|
$buffer=""; |
|
|
for($i=0;$i<(8-strlen($value));$i++) |
|
|
{ |
|
|
$buffer.="0"; |
|
|
} |
|
|
$value=$buffer.$value; |
|
|
} |
|
|
$value=ereg_replace("0","3",$value); |
|
|
$value=ereg_replace("1","0",$value); |
|
|
$value=ereg_replace("3","1",$value); |
|
|
$value=bindec($value); |
|
|
return $value; |
|
|
} |
|
| 699 |
} |
} |
| 700 |
|
|
| 701 |
|
=head2 unpack_cnt |
| 702 |
|
|
| 703 |
|
Unpack one of two 26 bytes fixed length record in C<.CNT> file. |
| 704 |
|
|
| 705 |
|
Here is definition of record: |
| 706 |
|
|
| 707 |
|
off key description size |
| 708 |
|
0: IDTYPE BTree type s |
| 709 |
|
2: ORDN Nodes Order s |
| 710 |
|
4: ORDF Leafs Order s |
| 711 |
|
6: N Number of Memory buffers for nodes s |
| 712 |
|
8: K Number of buffers for first level index s |
| 713 |
|
10: LIV Current number of Index Levels s |
| 714 |
|
12: POSRX Pointer to Root Record in N0x l |
| 715 |
|
16: NMAXPOS Next Available position in N0x l |
| 716 |
|
20: FMAXPOS Next available position in L0x l |
| 717 |
|
24: ABNORMAL Formal BTree normality indicator s |
| 718 |
|
length: 26 bytes |
| 719 |
|
|
| 720 |
|
This will fill C<$self> object under C<cnt> with hash. It's used by C<read_cnt>. |
| 721 |
|
|
| 722 |
=cut |
=cut |
| 723 |
|
|
| 724 |
|
sub unpack_cnt { |
| 725 |
|
my $self = shift; |
| 726 |
|
|
| 727 |
|
my @flds = qw(ORDN ORDF N K LIV POSRX NMAXPOS FMAXPOS ABNORMAL); |
| 728 |
|
|
| 729 |
|
my $buff = shift || return; |
| 730 |
|
my @arr = unpack("vvvvvvVVVv", $buff); |
| 731 |
|
|
| 732 |
|
print STDERR "unpack_cnt: ",join(" ",@arr),"\n" if ($self->{'debug'}); |
| 733 |
|
|
| 734 |
|
my $IDTYPE = shift @arr; |
| 735 |
|
foreach (@flds) { |
| 736 |
|
$self->{cnt}->{$IDTYPE}->{$_} = abs(shift @arr); |
| 737 |
|
} |
| 738 |
|
} |
| 739 |
|
|
| 740 |
1; |
1; |
|
__END__ |
|
| 741 |
|
|
| 742 |
=head1 BUGS |
=head1 BUGS |
| 743 |
|
|
| 744 |
This module has been very lightly tested. Use with caution and report bugs. |
Some parts of CDS/ISIS documentation are not detailed enough to exmplain |
| 745 |
|
some variations in input databases which has been tested with this module. |
| 746 |
|
When I was in doubt, I assumed that OpenIsis's implementation was right |
| 747 |
|
(except for obvious bugs). |
| 748 |
|
|
| 749 |
|
However, every effort has been made to test this module with as much |
| 750 |
|
databases (and programs that create them) as possible. |
| 751 |
|
|
| 752 |
|
I would be very greatful for success or failure reports about usage of this |
| 753 |
|
module with databases from programs other than WinIsis and IsisMarc. I had |
| 754 |
|
tested this against ouput of one C<isis.dll>-based application, but I don't |
| 755 |
|
know any details about it's version. |
| 756 |
|
|
| 757 |
|
=head1 VERSIONS |
| 758 |
|
|
| 759 |
|
As this is young module, new features are added in subsequent version. It's |
| 760 |
|
a good idea to specify version when using this module like this: |
| 761 |
|
|
| 762 |
|
use Biblio::Isis 0.21 |
| 763 |
|
|
| 764 |
|
Below is list of changes in specific version of module (so you can target |
| 765 |
|
older versions if you really have to): |
| 766 |
|
|
| 767 |
|
=over 8 |
| 768 |
|
|
| 769 |
|
=item 0.21 |
| 770 |
|
|
| 771 |
|
Added C<join_subfields_with> to L</new> and L</to_hash>. |
| 772 |
|
|
| 773 |
|
Added C<include_subfields> to L</to_hash>. |
| 774 |
|
|
| 775 |
|
=item 0.20 |
| 776 |
|
|
| 777 |
|
Added C<< $isis->mfn >>, support for repeatable subfields and |
| 778 |
|
C<< $isis->to_hash({ mfn => 42, ... }) >> calling convention |
| 779 |
|
|
| 780 |
|
=back |
| 781 |
|
|
| 782 |
=head1 AUTHOR |
=head1 AUTHOR |
| 783 |
|
|
| 786 |
dpavlin@rot13.org |
dpavlin@rot13.org |
| 787 |
http://www.rot13.org/~dpavlin/ |
http://www.rot13.org/~dpavlin/ |
| 788 |
|
|
| 789 |
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 |
| 790 |
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. |
| 791 |
|
|
| 792 |
=head1 COPYRIGHT |
=head1 COPYRIGHT |
| 793 |
|
|
| 800 |
|
|
| 801 |
=head1 SEE ALSO |
=head1 SEE ALSO |
| 802 |
|
|
| 803 |
L<http://www.openisis.org|OpenIsis>, perl(1). |
L<Biblio::Isis::Manual> for CDS/ISIS manual appendix F, G and H which describe file format |
| 804 |
|
|
| 805 |
|
OpenIsis web site L<http://www.openisis.org> |
| 806 |
|
|
| 807 |
|
perl4lib site L<http://perl4lib.perl.org> |
| 808 |
|
|
Parent Directory
| 
Revision Log
| 
Patch