/[webpac]/trunk/tools/phpmylib2marc.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/tools/phpmylib2marc.pl

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Revision 217 - (show annotations)
Sun Feb 1 23:28:27 2004 UTC (15 years, 7 months ago) by dpavlin
File MIME type: text/plain
File size: 4909 byte(s)
bugfix and improvements:
- debug and quiet switches
- skip fields which are too short (just subfield without data)
- calculate directory address
- calculate base address in leader

1 #!/usr/bin/perl -w
2 #
3 # This script will try (hard) to convert database from
4 # PhpMyLibrary (http://phpmylibrary.sourceforge.net/) back
5 # to MARC format (ISO 2709)
6 #
7 # 2003-01-31 Dobrica Pavlinusic <dpavlin@rot13.org>
8 #
9 # This script is written for WebPac project available at
10 # http://webpac.sourceforge.net/
11 #
12 # MARC file format documentation is taken from
13 # http://www.ariadne.ac.uk/issue7/marc/
14 #
15 #
16
17 use DBI;
18 use strict;
19 use Getopt::Long;
20
21 my $database = "postnuke";
22 my $host = "localhost";
23 my $user = "root";
24 my $passwd = "";
25
26 my $usage = 0;
27 my $debug = 0;
28 my $quiet = 0;
29
30 my $result = GetOptions(
31 "database=s" => \$database,
32 "host=s" => \$host,
33 "user=s" => \$user,
34 "password=s" => \$passwd,
35 "debug!" => \$debug,
36 "verbose!" => \$debug,
37 "quiet!" => \$quiet,
38 "help!" => \$usage,
39 );
40
41 if ($usage) {
42 print qq{usage: $0 [--database="$database" --host="$host" --user="$user" --password="$passwd"] > file.marc\n
43 This script will convert PhpMyLibrary database to standard UNIMARC format\n};
44 exit 1;
45 }
46
47 my $dsn = "DBI:mysql:database=$database;host=$host";
48 my $dbh = DBI->connect($dsn, $user, $passwd, {'RaiseError' => 1});
49
50 # UNIMARC leader format
51 #my $leader_fmt = qq{%05diam0 22%05d 45 };
52 # MARC leader format
53 my $leader_fmt = qq{%05dcas 22%05d a 4500};
54
55
56 my $sth = $dbh->prepare("SELECT marc FROM tblbib");
57 $sth->execute();
58
59 my $count = 0;
60 my $rec_nr = 0;
61
62 while (my $row = $sth->fetchrow_hashref()) {
63 my $marc = $row->{'marc'};
64 $rec_nr++;
65
66 my $real_len = length($marc);
67
68 my $skip = 0; # skip this record?
69
70 # fix PhpMyLibrary MARC (why do I have to do this? It's MARC,
71 # for gaddem sake!!!
72
73 # Byte Name
74 # ---- ----
75 # 0-4 Record Length
76 # 5 Status (n=new, c=corrected and d=deleted)
77 # 6 Type of Record (a=printed material)
78 # 7 Bibliographic Level (m=monograph)
79 # 8-9 Blanks
80 # 10 Indictator count (2 for monographs)
81 # 11 Subfield code count (2 - 0x1F+subfield code itself)
82 # 12-16 Base address of data
83 # 17 Encoding level (blank=full level, 1=sublevel 1, 2=sublevel 2,
84 # 3=sublevel 3)
85 # 18 Descriptive Cataloguing Form (blank=record is full ISBD,
86 # n=record is in non-ISBD format, i=record is in
87 # an incomplete ISBD format)
88 # 19 Blank
89 # 20 Length of length field in directory (always 4 in UNIMARC)
90 # 21 Length of Starting Character Position in directory (always
91 # 5 in UNIMARC)
92 # 22 Length of implementation defined portion in directory (always
93 # 0 in UNIMARC)
94 # 23 Blank
95 #
96 # |0 4|5 89 |12 16|1n 450 |
97 # (xxxxx)nam 22(.....) 450 <---
98 $marc =~ m/^(.....)......(.....)polerioj/ || die "record: '$marc' unparsable!";
99 my ($reclen,$base_addr) = ($1,$2);
100
101 my $directory = substr($marc,24,$base_addr-24);
102 my $fields = substr($marc,$base_addr-1);
103
104 print STDERR "# $rec_nr fields: '$fields'\n" if ($debug);
105 print STDERR "# $rec_nr directory: [",length($directory),"]\n" if ($debug);
106
107 # PhpMyLibrary MARC records don't have indicators, so we'll add them
108
109 my $o = 0; # offset
110 my $new_dictionary;
111 my $new_fields;
112
113 while (!$skip && $directory =~ s/(\d{3})(\d{4})(\d{5})//) {
114 my ($tag,$len,$addr) = ($1,$2,$3);
115
116 sub check_field($) {
117 my $f = shift;
118 my $del = substr($f,0,1);
119
120 die "expected 0x1e, got '$del' (".ord($del)."): '$f'" if (ord($del) != 30);
121 }
122
123 if (($addr+$len) > length($fields)) {
124 print STDERR "WARNING: error in dictionary on record $rec_nr skipping...\n" if (! $quiet);
125 $skip = 1;
126 next;
127 }
128
129 # take field
130 my $f = substr($fields,$addr,$len);
131 print STDERR "tag/len/addr $tag [$len] $addr: '$f'\n" if ($debug);
132
133 my $del = substr($fields,$addr+$len,1);
134
135 # check field delimiters...
136 if ($del ne chr(30)) {
137 print STDERR "WARNING: skipping record $rec_nr, can't find delimiters got: '$del'\n" if (! $quiet);
138 $skip = 1;
139 next;
140 }
141
142 check_field($f);
143
144 if (length($f) < 2) {
145 print STDERR "WARNING: skipping field $tag from record $rec_nr because it's too short!\n" if (! $quiet);
146 next;
147 }
148
149
150 if ($tag =~ m/^00/) {
151 # fields 001-008 doesn't have indicators
152 $new_dictionary .= sprintf("%03d%04d%05d",$tag,$len,length($new_fields || ''));
153 $new_fields.=$f;
154 } else {
155 $new_dictionary .= sprintf("%03d%04d%05d",$tag,($len+2),length($new_fields || ''));
156 $new_fields.=chr(30)." ".substr($f,1);
157 $o += 2;
158 }
159 }
160
161 if (! $skip) {
162 my $new_leader = sprintf($leader_fmt,24+length($new_dictionary.$new_fields)+2,length($new_dictionary)+25);
163 my $new_marc = $new_leader . $new_dictionary . $new_fields . chr(30);
164 $new_marc .= chr(29); # end of record
165
166 print STDERR "original and new marc: [$rec_nr/$count]\n$marc\n$new_marc\n\n" if ($debug);
167 print "$new_marc";
168 $count++;
169 }
170
171 # last if ($count > 100);
172
173 }
174 $sth->finish();
175 $dbh->disconnect();
176
177 print STDERR "$count records from database $database converted...\n";

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