root/gsdl/trunk/perllib/dbutil.pm @ 15705

Revision 15705, 2.9 KB (checked in by mdewsnip, 11 years ago)

Merged the one lonely function in unbuildutil into dbutil, as it is GDBM-specific.

Line 
1###########################################################################
2#
3# dbutil.pm -- utility functions for writing to different databases
4# Copyright (C) 2008  DL Consulting Ltd
5#
6# A component of the Greenstone digital library software
7# from the New Zealand Digital Library Project at the
8# University of Waikato, New Zealand.
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26package dbutil;
27
28use strict;
29
30
31sub read_infodb_file
32{
33    my $infodb_file_path = shift(@_);
34    my $infodb_map = shift(@_);
35
36    &read_infodb_file_gdbm($infodb_file_path, $infodb_map);
37}
38
39
40sub write_infodb_entry
41{
42    my $infodb_handle = shift(@_);
43    my $infodb_key = shift(@_);
44    my $infodb_map = shift(@_);
45
46    &write_infodb_entry_gdbm($infodb_handle, $infodb_key, $infodb_map);
47}
48
49
50
51# ----------------------------------------------------------------------------------------
52#   GDBM FUNCTIONS
53# ----------------------------------------------------------------------------------------
54
55sub read_infodb_file_gdbm
56{
57    my $infodb_file_path = shift(@_);
58    my $infodb_map = shift(@_);
59
60    open (PIPEIN, "db2txt \"$infodb_file_path\" |") || die "couldn't open pipe from db2txt\n";
61    my $infodb_line = "";
62    my $infodb_key = "";
63    my $infodb_value = "";
64    while (defined ($infodb_line = <PIPEIN>))
65    {
66    if ($infodb_line =~ /^\[([^\]]+)\]$/)
67    {
68        $infodb_key = $1;
69    }
70    elsif ($infodb_line =~ /^-{70}$/)
71    {
72        $infodb_map->{$infodb_key} = $infodb_value;
73        $infodb_key = "";
74        $infodb_value = "";
75    }
76    else
77    {
78        $infodb_value .= $infodb_line;
79    }
80    }
81
82    close (PIPEIN);
83}
84
85   
86sub write_infodb_entry_gdbm
87{
88    my $infodb_handle = shift(@_);
89    my $infodb_key = shift(@_);
90    my $infodb_map = shift(@_);
91
92    print $infodb_handle "[$infodb_key]\n";
93    foreach my $infodb_value_key (keys(%$infodb_map))
94    {
95    foreach my $infodb_value (@{$infodb_map->{$infodb_value_key}})
96    {
97        if ($infodb_value =~ /-{70,}/)
98        {
99        # if value contains 70 or more hyphens in a row we need to escape them
100        # to prevent txt2db from treating them as a separator
101        $infodb_value =~ s/-/&\#045;/gi;
102        }
103        print $infodb_handle "<$infodb_value_key>" . $infodb_value . "\n";
104    }
105    }
106    print $infodb_handle '-' x 70, "\n";
107}
108
109
1101;
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