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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 = 0.06; |
$VERSION = 0.08; |
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@ISA = qw (Exporter); |
@ISA = qw (Exporter); |
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#Give a hoot don't pollute, do not export more than needed by default |
#Give a hoot don't pollute, do not export more than needed by default |
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@EXPORT = qw (); |
@EXPORT = qw (); |
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=item isisdb |
=item isisdb |
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This is full or relative path to ISIS database files which include |
This is full or relative path to ISIS database files which include |
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common prefix of C<.FDT>, C<.MST>, C<.CNT>, C<.XRF> and C<.MST> files. |
common prefix of C<.MST>, and C<.XRF> and optionally C<.FDT> (if using |
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C<read_fdt> option) files. |
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In this example it uses C<./cds/cds.MST> and related files. |
In this example it uses C<./cds/cds.MST> and related files. |
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$self->{$v} = {@_}->{$v}; |
$self->{$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)$/); |
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$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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my $buff; |
my $buff; |
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read(fileMST, $buff, 4); |
read($self->{'fileMST'}, $buff, 4); |
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$self->{'NXTMFN'}=unpack("l",$buff) || carp "NXTNFN is zero"; |
$self->{'NXTMFN'}=unpack("l",$buff) || carp "NXTNFN is zero"; |
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# save maximum MFN |
# save maximum MFN |
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$self->{'maxmfn'} = $self->{'NXTMFN'} - 1; |
$self->{'maxmfn'} = $self->{'NXTMFN'} - 1; |
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close(fileMST); |
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print STDERR Dumper($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 $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; |
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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 STDERR Dumper($self),"\n" if ($self->{debug}); |
return $self->{cnt}; |
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# open files for later |
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open($self->{'fileXRF'}, $self->{isisdb}.".XRF") || croak "can't open '$self->{isisdb}.XRF': $!"; |
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open($self->{'fileMST'}, $self->{isisdb}.".MST") || croak "can't open '$self->{isisdb}.MST': $!"; |
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$self ? return $self : return undef; |
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} |
} |
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=head2 fetch |
=head2 fetch |
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# is mfn allready in memory? |
# is mfn allready in memory? |
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my $old_mfn = $self->{'current_mfn'} || -1; |
my $old_mfn = $self->{'current_mfn'} || -1; |
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return if ($mfn == $old_mfn); |
return $self->{record} if ($mfn == $old_mfn); |
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print STDERR "## fetch: $mfn\n" if ($self->{debug}); |
print STDERR "## fetch: $mfn\n" if ($self->{debug}); |
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# XXX check this? |
# XXX check this? |
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my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
my $mfnpos=($mfn+int(($mfn-1)/127))*4; |
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print STDERR "## seeking to $mfnpos in file '$self->{isisdb}.XRF'\n" if ($self->{debug}); |
print STDERR "## seeking to $mfnpos in file '$self->{xrf_file}'\n" if ($self->{debug}); |
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seek($self->{'fileXRF'},$mfnpos,0); |
seek($self->{'fileXRF'},$mfnpos,0); |
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my $buff; |
my $buff; |
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# delete old record |
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delete $self->{record}; |
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# read XRFMFB abd XRFMFP |
# read XRFMFB abd XRFMFP |
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read($self->{'fileXRF'}, $buff, 4); |
read($self->{'fileXRF'}, $buff, 4); |
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my $pointer=unpack("l",$buff) || carp "pointer is null"; |
my $pointer=unpack("l",$buff) || carp "pointer is null"; |
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# check for logically deleted record |
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if ($pointer < 0) { |
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print STDERR "## record $mfn is logically deleted\n" if ($self->{debug}); |
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$self->{deleted} = $mfn; |
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return unless $self->{include_deleted}; |
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$pointer = abs($pointer); |
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} |
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my $XRFMFB = int($pointer/2048); |
my $XRFMFB = int($pointer/2048); |
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my $XRFMFP = $pointer - ($XRFMFB*2048); |
my $XRFMFP = $pointer - ($XRFMFB*2048); |
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# (XRFMFB - 1) * 512 + XRFMFP |
# (XRFMFB - 1) * 512 + XRFMFP |
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# why do i have to do XRFMFP % 1024 ? |
# why do i have to do XRFMFP % 1024 ? |
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my $blk_off = (($XRFMFB - 1) * 512) + ($XRFMFP % 1024); |
my $blk_off = (($XRFMFB - 1) * 512) + ($XRFMFP % 512); |
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print STDERR "## pointer: $pointer XRFMFB: $XRFMFB XRFMFP: $XRFMFP offset: $blk_off\n" if ($self->{'debug'}); |
print STDERR "## pointer: $pointer XRFMFB: $XRFMFB XRFMFP: $XRFMFP offset: $blk_off\n" if ($self->{'debug'}); |
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print STDERR "## offset for rowid $value is $blk_off (blk $XRFMFB off $XRFMFP)\n" if ($self->{debug}); |
print STDERR "## offset for rowid $value is $blk_off (blk $XRFMFB off $XRFMFP)\n" if ($self->{debug}); |
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if ($value!=$mfn) { |
if ($value!=$mfn) { |
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carp "Error: MFN ".$mfn." not found in MST(".$value.")"; |
if ($value == 0) { |
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#return; # XXX deleted record? |
print STDERR "## record $mfn is physically deleted\n" if ($self->{debug}); |
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} |
$self->{deleted} = $mfn; |
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return; |
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} |
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# $MFRL=$self->Read16($fileMST); |
carp "Error: MFN ".$mfn." not found in MST file, found $value"; |
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# $MFBWB=$self->Read32($fileMST); |
return; |
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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($fileMST); |
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read($self->{'fileMST'}, $buff, 14); |
read($self->{'fileMST'}, $buff, 14); |
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print STDERR "## 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}); |
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# delete old record |
warn "MFRL $MFRL is not even number" unless ($MFRL % 2 == 0); |
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delete $self->{record}; |
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## FIXME this is a bug |
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if (! $self->{'include_deleted'} && $MFRL < 0) { |
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print "## logically deleted record $mfn, skipping...\n" if ($self->{debug}); |
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return; |
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} |
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warn "BASE is not 18+6*NVF" unless ($BASE == 18 + 6 * $NVF); |
warn "BASE is not 18+6*NVF" unless ($BASE == 18 + 6 * $NVF); |
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for (my $i = 0 ; $i < $NVF ; $i++) { |
for (my $i = 0 ; $i < $NVF ; $i++) { |
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# $TAG=$self->Read16($fileMST); |
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# $POS=$self->Read16($fileMST); |
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# $LEN=$self->Read16($fileMST); |
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my ($TAG,$POS,$LEN) = unpack("sss", substr($buff,$i * 6, 6)); |
my ($TAG,$POS,$LEN) = unpack("sss", substr($buff,$i * 6, 6)); |
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print STDERR "## TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
print STDERR "## TAG: $TAG POS: $POS LEN: $LEN\n" if ($self->{debug}); |
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push @{$self->{record}->{$FieldTAG[$i]}}, substr($buff,$FieldPOS[$i],$FieldLEN[$i]); |
push @{$self->{record}->{$FieldTAG[$i]}}, substr($buff,$FieldPOS[$i],$FieldLEN[$i]); |
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} |
} |
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close(fileMST); |
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$self->{'current_mfn'} = $mfn; |
$self->{'current_mfn'} = $mfn; |
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print Dumper($self),"\n" if ($self->{debug}); |
print STDERR Dumper($self),"\n" if ($self->{debug}); |
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return $self->{'record'}; |
return $self->{'record'}; |
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} |
} |
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my $val; |
my $val; |
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# has identifiers? |
# has identifiers? |
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($val->{'i1'},$val->{'i2'}) = ($1,$2) if ($l =~ s/^([01 #])([01 #])//); |
($val->{'i1'},$val->{'i2'}) = ($1,$2) if ($l =~ s/^([01 #])([01 #])\^/\^/); |
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# has subfields? |
# has subfields? |
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if ($l =~ m/\^/) { |
if ($l =~ m/\^/) { |