1 | ###########################################################################
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2 | #
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3 | # dbutil::gdbm -- utility functions for writing to gdbm databases
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4 | #
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5 | # A component of the Greenstone digital library software
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6 | # from the New Zealand Digital Library Project at the
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7 | # University of Waikato, New Zealand.
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8 | #
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9 | # Copyright (C) 2009
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10 | #
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11 | # This program is free software; you can redistribute it and/or modify
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12 | # it under the terms of the GNU General Public License as published by
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13 | # the Free Software Foundation; either version 2 of the License, or
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14 | # (at your option) any later version.
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15 | #
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16 | # This program is distributed in the hope that it will be useful,
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17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | # GNU General Public License for more details.
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20 | #
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21 | # You should have received a copy of the GNU General Public License
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22 | # along with this program; if not, write to the Free Software
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23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | #
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25 | ###########################################################################
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26 |
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27 | package dbutil::gdbm;
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28 |
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29 | use strict;
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30 |
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31 | use dbutil::gdbmtxtgz;
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32 |
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33 | # -----------------------------------------------------------------------------
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34 | # GDBM IMPLEMENTATION
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35 | # -----------------------------------------------------------------------------
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36 |
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37 | sub open_infodb_write_handle
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38 | {
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39 | my $infodb_file_path = shift(@_);
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40 | my $opt_append = shift(@_);
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41 |
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42 | my $txt2db_exe = &util::filename_cat($ENV{'GSDLHOME'},"bin",$ENV{'GSDLOS'}, "txt2db" . &util::get_os_exe());
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43 | my $infodb_file_handle = undef;
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44 | my $cmd = "\"$txt2db_exe\"";
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45 | if ((defined $opt_append) && ($opt_append eq "append")) {
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46 | $cmd .= " -append";
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47 | }
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48 | $cmd .= " \"$infodb_file_path\"";
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49 |
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50 | if (!-e "$txt2db_exe")
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51 | {
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52 | print STDERR "Error: Unable to find $txt2db_exe\n";
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53 | return undef;
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54 | }
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55 |
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56 | if(!open($infodb_file_handle, "| $cmd"))
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57 | {
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58 | print STDERR "Error: Failed to open pipe to $cmd\n";
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59 | print STDERR " $!\n";
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60 | return undef;
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61 | }
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62 |
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63 | return $infodb_file_handle;
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64 | }
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65 |
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66 |
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67 |
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68 | sub close_infodb_write_handle
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69 | {
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70 | my $infodb_handle = shift(@_);
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71 |
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72 | close($infodb_handle);
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73 | }
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74 |
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75 |
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76 | sub get_infodb_file_path
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77 | {
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78 | my $collection_name = shift(@_);
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79 | my $infodb_directory_path = shift(@_);
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80 |
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81 | my $infodb_file_extension = ".gdb";
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82 | my $infodb_file_name = &util::get_dirsep_tail($collection_name) . $infodb_file_extension;
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83 | return &util::filename_cat($infodb_directory_path, $infodb_file_name);
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84 | }
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85 |
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86 |
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87 | sub read_infodb_file
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88 | {
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89 | my $infodb_file_path = shift(@_);
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90 | my $infodb_map = shift(@_);
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91 |
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92 | open (PIPEIN, "db2txt \"$infodb_file_path\" |") || die "couldn't open pipe from db2txt \$infodb_file_path\"\n";
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93 | my $infodb_line = "";
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94 | my $infodb_key = "";
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95 | my $infodb_value = "";
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96 | while (defined ($infodb_line = <PIPEIN>))
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97 | {
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98 | if ($infodb_line =~ /^\[([^\]]+)\]$/)
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99 | {
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100 | $infodb_key = $1;
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101 | }
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102 | elsif ($infodb_line =~ /^-{70}$/)
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103 | {
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104 | $infodb_map->{$infodb_key} = $infodb_value;
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105 | $infodb_key = "";
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106 | $infodb_value = "";
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107 | }
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108 | else
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109 | {
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110 | $infodb_value .= $infodb_line;
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111 | }
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112 | }
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113 |
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114 | close (PIPEIN);
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115 | }
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116 |
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117 | sub read_infodb_keys
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118 | {
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119 | my $infodb_file_path = shift(@_);
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120 | my $infodb_map = shift(@_);
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121 |
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122 | open (PIPEIN, "gdbmkeys \"$infodb_file_path\" |") || die "couldn't open pipe from gdbmkeys \$infodb_file_path\"\n";
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123 | my $infodb_line = "";
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124 | my $infodb_key = "";
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125 | my $infodb_value = "";
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126 | while (defined ($infodb_line = <PIPEIN>))
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127 | {
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128 | chomp $infodb_line; # remove end of line
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129 |
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130 | $infodb_map->{$infodb_line} = 1;
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131 | }
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132 |
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133 | close (PIPEIN);
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134 | }
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135 |
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136 | sub write_infodb_entry
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137 | {
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138 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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139 | &dbutil::gdbmtxtgz::write_infodb_entry(@_);
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140 | }
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141 |
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142 | sub write_infodb_rawentry
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143 | {
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144 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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145 | &dbutil::gdbmtxtgz::write_infodb_rawentry(@_);
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146 | }
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147 |
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148 |
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149 | sub delete_infodb_entry
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150 | {
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151 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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152 | &dbutil::gdbmtxtgz::delete_infodb_entry(@_);
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153 | }
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154 |
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155 |
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156 |
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157 | 1;
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