1 | ###########################################################################
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2 | #
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3 | # cfgread.pm --
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 1999 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | # reads in configuration files
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27 |
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28 | package cfgread;
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29 |
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30 |
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31 | sub read_cfg_line {
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32 | my ($handle) = @_;
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33 | my $line = "";
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34 | my @line = ();
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35 | my $linecontinues = 0;
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36 |
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37 | while (defined($line = <$handle>)) {
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38 | $line =~ s/^\#.*$//; # remove comments
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39 | $line =~ s/\cM|\cJ//g; # remove end-of-line characters
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40 | $line =~ s/^\s+//; # remove initial white space
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41 | # Merge with following line if a quoted phrase is left un-closed.
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42 | if ($line =~ m/[^\\]([\"\'])/) {
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43 | my $quote=$1;
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44 | while ($line !~ m/$quote(.*?[^\\])?(\\\\)*$quote/) {
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45 | my $nextline = <$handle>;
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46 | if (defined($nextline)) {
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47 | $nextline =~ s/\r?\n//; # remove end-of-line
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48 | $line .= " " . $nextline;
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49 | } else {
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50 | return undef; # parse error?
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51 | }
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52 | }
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53 | }
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54 | $linecontinues = $line =~ s/\\$//;
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55 |
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56 | while ($line =~ s/\s*(\".*?[^\\](\\\\)*\"|\'.*?[^\\](\\\\)*\'|\S+)\s*//) {
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57 | if (defined $1) {
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58 | # remove any enclosing quotes
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59 | my $entry = $1;
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60 | $entry =~ s/^([\"\'])(.*)\1$/$2/;
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61 |
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62 | # substitute an environment variables
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63 | ## $entry =~ s/\$(\w+)/$ENV{$1}/g;
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64 | $entry =~ s/\$\{(\w+)\}/$ENV{$1}/g;
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65 | push (@line, $entry);
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66 | } else {
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67 | push (@line, "");
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68 | }
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69 | }
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70 |
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71 | if (scalar(@line) > 0 && !$linecontinues) {
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72 | # print STDERR "line: \"" . join ("\" \"", @line) . "\"\n";
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73 | return \@line;
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74 | }
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75 | }
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76 |
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77 | return undef;
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78 | }
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79 |
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80 | sub write_cfg_line {
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81 | my ($handle, $line) = @_;
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82 | print $handle join ("\t", @$line), "\n";
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83 | }
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84 |
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85 |
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86 | # stringexp, arrayexp, hashexp,arrayarrayexp and hashhashexp
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87 | # should be something like '^(this|that)$'
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88 | sub read_cfg_file {
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89 | my ($filename, $stringexp, $arrayexp, $hashexp, $arrayarrayexp,
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90 | $hashhashexp) = @_;
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91 | my ($line);
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92 | my $data = {};
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93 |
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94 | if (open (COLCFG, $filename)) {
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95 | while (defined ($line = &read_cfg_line('COLCFG'))) {
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96 | if (scalar(@$line) >= 2) {
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97 | my $key = shift (@$line);
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98 | if (defined $stringexp && $key =~ /$stringexp/) {
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99 | $data->{$key} = shift (@$line);
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100 |
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101 | } elsif (defined $arrayexp && $key =~ /$arrayexp/) {
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102 | push (@{$data->{$key}}, @$line);
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103 |
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104 | } elsif (defined $hashexp && $key =~ /$hashexp/) {
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105 | my $k = shift @$line;
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106 | my $v = shift @$line;
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107 | $data->{$key}->{$k} = $v;
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108 | } elsif (defined $arrayarrayexp && $key =~ /$arrayarrayexp/) {
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109 | if (!defined $data->{$key}) {
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110 | $data->{$key} = [];
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111 | }
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112 | push (@{$data->{$key}}, $line);
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113 | }
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114 | elsif (defined $hashhashexp && $key =~ /$hashhashexp/) {
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115 | my $k = shift @$line;
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116 | my $p = shift @$line;
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117 | my $v = shift @$line;
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118 | if (!defined $v) {
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119 | $v = $p;
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120 | $p = 'default';
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121 | }
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122 | $data->{$key}->{$k}->{$p} = $v;
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123 | }
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124 | }
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125 | }
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126 | close (COLCFG);
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127 |
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128 | } else {
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129 | print STDERR "cfgread::read_cfg_file couldn't read the cfg file $filename\n";
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130 | }
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131 |
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132 | return $data;
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133 | }
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134 |
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135 |
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136 | # stringexp, arrayexp, hashexp and arrayarrayexp
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137 | # should be something like '^(this|that)$'
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138 | sub write_cfg_file {
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139 | my ($filename, $data, $stringexp, $arrayexp, $hashexp, $arrayarrayexp,
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140 | $hashhashexp) = @_;
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141 |
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142 | if (open (COLCFG, ">$filename")) {
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143 | foreach $key (sort(keys(%$data))) {
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144 | if ($key =~ /$stringexp/) {
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145 | &write_cfg_line ('COLCFG', [$key, $data->{$key}]);
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146 | } elsif ($key =~ /$arrayexp/) {
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147 | &write_cfg_line ('COLCFG', [$key, @{$data->{$key}}]);
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148 | } elsif ($key =~ /$hashexp/) {
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149 | foreach $k (keys (%{$data->{$key}})) {
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150 | &write_cfg_line ('COLCFG', [$key, $k, $data->{$key}->{$k}]);
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151 | }
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152 | } elsif ($key =~ /$arrayarrayexp/) {
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153 | foreach $k (@{$data->{$key}}) {
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154 | &write_cfg_line ('COLCFG', [$key, @$k]);
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155 | }
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156 | } elsif ($key =~ /$hashhashexp/) {
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157 | foreach $k (keys (%{$data->{$key}})) {
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158 | foreach $p (keys (%{$data->{$key}->{$k}})) {
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159 | if ($p =~ /default/) {
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160 | &write_cfg_line ('COLCFG',
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161 | [$key, $k, $data->{$key}->{$k}]);
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162 | }
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163 | else {
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164 | &write_cfg_line ('COLCFG',
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165 | [$key, $k, $p, $data->{$key}->{$k}->{$p}]);
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166 | }
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167 | }
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168 | }
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169 | }
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170 | }
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171 | close (COLCFG);
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172 | } else {
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173 | print STDERR "cfgread::write_cfg_file couldn't write the cfg file $filename\n";
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174 | }
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175 | }
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176 |
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177 |
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178 | 1;
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