--- /dev/null
+# This module does multiple indices, supporting the style of the LaTex 'index'
+# package.
+
+# Version Information:
+# 16-Feb-2005 -- Original Creation. Karl E. Cunningham
+# 14-Mar-2005 -- Clarified and Consolodated some of the code.
+# Changed to smoothly handle single and multiple indices.
+
+# Two LaTeX index formats are supported...
+# --- SINGLE INDEX ---
+# \usepackage{makeidx}
+# \makeindex
+# \index{entry1}
+# \index{entry2}
+# \index{entry3}
+# ...
+# \printindex
+#
+# --- MULTIPLE INDICES ---
+#
+# \usepackage{makeidx}
+# \usepackage{index}
+# \makeindex -- latex2html doesn't care but LaTeX does.
+# \newindex{ref1}{ext1}{ext2}{title1}
+# \newindex{ref2}{ext1}{ext2}{title2}
+# \newindex{ref3}{ext1}{ext2}{title3}
+# \index[ref1]{entry1}
+# \index[ref1]{entry2}
+# \index[ref3]{entry3}
+# \index[ref2]{entry4}
+# \index{entry5}
+# \index[ref3]{entry6}
+# ...
+# \printindex[ref1]
+# \printindex[ref2]
+# \printindex[ref3]
+# \printindex
+# ___________________
+#
+# For the multiple-index style, each index is identified by the ref argument to \newindex, \index,
+# and \printindex. A default index is allowed, which is indicated by omitting the optional
+# argument. The default index does not require a \newindex command. As \index commands
+# are encountered, their entries are stored according
+# to the ref argument. When the \printindex command is encountered, the stored index
+# entries for that argument are retrieved and printed. The title for each index is taken
+# from the last argument in the \newindex command.
+# While processing \index and \printindex commands, if no argument is given the index entries
+# are built into a default index. The title of the default index is simply "Index".
+# This makes the difference between single- and multiple-index processing trivial.
+#
+# Another method can be used by omitting the \printindex command and just using \include to
+# pull in index files created by the makeindex program. These files will start with
+# \begin{theindex}. This command is used to determine where to print the index. Using this
+# approach, the indices will be output in the same order as the newindex commands were
+# originally found (see below). Using a combination of \printindex and \include{indexfile} has not
+# been tested and may produce undesireable results.
+#
+# The index data are stored in a hash for later sorting and output. As \printindex
+# commands are handled, the order in which they were found in the tex filea is saved,
+# associated with the ref argument to \printindex.
+#
+# We use the original %index hash to store the index data into. We append a \002 followed by the
+# name of the index to isolate the entries in different indices from each other. This is necessary
+# so that different indices can have entries with the same name. For the default index, the \002 is
+# appended without the name.
+#
+# Since the index order in the output cannot be determined if the \include{indexfile}
+# command is used, the order will be assumed from the order in which the \newindex
+# commands were originally seen in the TeX files. This order is saved as well as the
+# order determined from any printindex{ref} commands. If \printindex commnads are used
+# to specify the index output, that order will be used. If the \include{idxfile} command
+# is used, the order of the original newindex commands will be used. In this case the
+# default index will be printed last since it doesn't have a corresponding \newindex
+# command and its order cannot be determined. Mixing \printindex and \include{idxfile}
+# commands in the same file is likely to produce less than satisfactory results.
+#
+#
+# The hash containing index data is named %indices. It contains the following data:
+#{
+# 'title' => {
+# $ref1 => $indextitle ,
+# $ref2 => $indextitle ,
+# ...
+# },
+# 'newcmdorder' => [ ref1, ref2, ..., * ], # asterisk indicates the position of the default index.
+# 'printindorder' => [ ref1, ref2, ..., * ], # asterisk indicates the position of the default index.
+#}
+
+
+# Globals to handle multiple indices.
+my %indices;
+
+# This tells the system to use up to 7 words in index entries.
+$WORDS_IN_INDEX = 10;
+
+# KEC 2-18-05
+# Handles the \newindex command. This is called if the \newindex command is
+# encountered in the LaTex source. Gets the index ref and title from the arguments.
+# Saves the index ref and title.
+# Note that we are called once to handle multiple \newindex commands that are
+# newline-separated.
+sub do_cmd_newindex {
+ my $data = shift;
+ # The data is sent to us as fields delimited by their ID #'s. We extract the
+ # fields.
+ foreach my $line (split("\n",$data)) {
+ my @fields = split (/(?:\<\#\d+?\#\>)+/,$line);
+
+ # The index name and title are the second and fourth fields in the data.
+ if ($line =~ /^</ or $line =~ /^\\newindex/) {
+ my ($indexref,$indextitle) = ($fields[1],$fields[4]);
+ $indices{'title'}{$indexref} = $indextitle;
+ push (@{$indices{'newcmdorder'}},$indexref);
+ }
+ }
+}
+
+
+# KEC -- Copied from makeidx.perl and modified to do multiple indices.
+# Processes an \index entry from the LaTex file.
+# Gets the optional argument from the index command, which is the name of the index
+# into which to place the entry.
+# Drops the brackets from the index_name
+# Puts the index entry into the html stream
+# Creates the tokenized index entry (which also saves the index entry info
+sub do_real_index {
+ local($_) = @_;
+ local($pat,$idx_entry,$index_name);
+ # catches opt-arg from \index commands for index.sty
+ $index_name = &get_next_optional_argument;
+ $index_name = "" unless defined $index_name;
+ # Drop leading and trailing brackets from the index name.
+ $index_name =~ s/^\[|\]$//g;
+
+ $idx_entry = &missing_braces unless (
+ (s/$next_pair_pr_rx/$pat=$1;$idx_entry=$2;''/e)
+ ||(s/$next_pair_rx/$pat=$1;$idx_entry=$2;''/e));
+
+ if ($index_name and defined $idx_entry and
+ !defined $indices{'title'}{$index_name}) {
+ print STDERR "\nInvalid Index Name: \\index \[$index_name\]\{$idx_entry\}\n";
+ }
+
+ $idx_entry = &named_index_entry($pat, $idx_entry,$index_name);
+ $idx_entry.$_;
+}
+
+# Creates and saves an index entry in the index hashes.
+# Modified to do multiple indices.
+# Creates an index_key that allows index entries to have the same characteristics but be in
+# different indices. This index_key is the regular key with the index name appended.
+# Save the index order for the entry in the %index_order hash.
+sub named_index_entry {
+ local($br_id, $str, $index_name) = @_;
+ my ($index_key);
+ # escape the quoting etc characters
+ # ! -> \001
+ # @ -> \002
+ # | -> \003
+ $* = 1; $str =~ s/\n\s*/ /g; $* = 0; # remove any newlines
+ # protect \001 occurring with images
+ $str =~ s/\001/\016/g; # 0x1 to 0xF
+ $str =~ s/\\\\/\011/g; # Double backslash -> 0xB
+ $str =~ s/\\;SPMquot;/\012/g; # \;SPMquot; -> 0xC
+ $str =~ s/;SPMquot;!/\013/g; # ;SPMquot; -> 0xD
+ $str =~ s/!/\001/g; # Exclamation point -> 0x1
+ $str =~ s/\013/!/g; # 0xD -> Exclaimation point
+ $str =~ s/;SPMquot;@/\015/g; # ;SPMquot;@ to 0xF
+ $str =~ s/@/\002/g; # At sign -> 0x2
+ $str =~ s/\015/@/g; # 0xF to At sign
+ $str =~ s/;SPMquot;\|/\017/g; # ;SMPquot;| to 0x11
+ $str =~ s/\|/\003/g; # Vertical line to 0x3
+ $str =~ s/\017/|/g; # 0x11 to vertical line
+ $str =~ s/;SPMquot;(.)/\1/g; # ;SPMquot; -> whatever the next character is
+ $str =~ s/\012/;SPMquot;/g; # 0x12 to ;SPMquot;
+ $str =~ s/\011/\\\\/g; # 0x11 to double backslash
+ local($key_part, $pageref) = split("\003", $str, 2);
+
+ # For any keys of the form: blablabla!blablabla, which want to be split at the
+ # exclamation point, replace the ! with a comma and a space. We don't do it
+ # that way for this index.
+ $key_part =~ s/\001/, /g;
+ local(@keys) = split("\001", $key_part);
+ # If TITLE is not yet available use $before.
+ $TITLE = $saved_title if (($saved_title)&&(!($TITLE)||($TITLE eq $default_title)));
+ $TITLE = $before unless $TITLE;
+ # Save the reference
+ local($words) = '';
+ if ($SHOW_SECTION_NUMBERS) { $words = &make_idxnum; }
+ elsif ($SHORT_INDEX) { $words = &make_shortidxname; }
+ else { $words = &make_idxname; }
+ local($super_key) = '';
+ local($sort_key, $printable_key, $cur_key);
+ foreach $key (@keys) {
+ $key =~ s/\016/\001/g; # revert protected \001s
+ ($sort_key, $printable_key) = split("\002", $key);
+ #
+ # RRM: 16 May 1996
+ # any \label in the printable-key will have already
+ # created a label where the \index occurred.
+ # This has to be removed, so that the desired label
+ # will be found on the Index page instead.
+ #
+ if ($printable_key =~ /tex2html_anchor_mark/ ) {
+ $printable_key =~ s/><tex2html_anchor_mark><\/A><A//g;
+ local($tmpA,$tmpB) = split("NAME=\"", $printable_key);
+ ($tmpA,$tmpB) = split("\"", $tmpB);
+ $ref_files{$tmpA}='';
+ $index_labels{$tmpA} = 1;
+ }
+ #
+ # resolve and clean-up the hyperlink index-entries
+ # so they can be saved in an index.pl file
+ #
+ if ($printable_key =~ /$cross_ref_mark/ ) {
+ local($label,$id,$ref_label);
+ # $printable_key =~ s/$cross_ref_mark#(\w+)#(\w+)>$cross_ref_mark/
+ $printable_key =~ s/$cross_ref_mark#([^#]+)#([^>]+)>$cross_ref_mark/
+ do { ($label,$id) = ($1,$2);
+ $ref_label = $external_labels{$label} unless
+ ($ref_label = $ref_files{$label});
+ '"' . "$ref_label#$label" . '">' .
+ &get_ref_mark($label,$id)}
+ /geo;
+ }
+ $printable_key =~ s/<\#[^\#>]*\#>//go;
+ #RRM
+ # recognise \char combinations, for a \backslash
+ #
+ $printable_key =~ s/\&\#;\'134/\\/g; # restore \\s
+ $printable_key =~ s/\&\#;\`<BR> /\\/g; # ditto
+ $printable_key =~ s/\&\#;*SPMquot;92/\\/g; # ditto
+ #
+ # $sort_key .= "@$printable_key" if !($printable_key); # RRM
+ $sort_key .= "@$printable_key" if !($sort_key); # RRM
+ $sort_key =~ tr/A-Z/a-z/;
+ if ($super_key) {
+ $cur_key = $super_key . "\001" . $sort_key;
+ $sub_index{$super_key} .= $cur_key . "\004";
+ } else {
+ $cur_key = $sort_key;
+ }
+
+ # Append the $index_name to the current key with a \002 delimiter. This will
+ # allow the same index entry to appear in more than one index.
+ $index_key = $cur_key . "\002$index_name";
+
+ $index{$index_key} .= "";
+
+ #
+ # RRM, 15 June 1996
+ # if there is no printable key, but one is known from
+ # a previous index-entry, then use it.
+ #
+ if (!($printable_key) && ($printable_key{$index_key}))
+ { $printable_key = $printable_key{$index_key}; }
+# if (!($printable_key) && ($printable_key{$cur_key}))
+# { $printable_key = $printable_key{$cur_key}; }
+ #
+ # do not overwrite the printable_key if it contains an anchor
+ #
+ if (!($printable_key{$index_key} =~ /tex2html_anchor_mark/ ))
+ { $printable_key{$index_key} = $printable_key || $key; }
+# if (!($printable_key{$cur_key} =~ /tex2html_anchor_mark/ ))
+# { $printable_key{$cur_key} = $printable_key || $key; }
+
+ $super_key = $cur_key;
+ }
+ #
+ # RRM
+ # page-ranges, from |( and |) and |see
+ #
+ if ($pageref) {
+ if ($pageref eq "\(" ) {
+ $pageref = '';
+ $next .= " from ";
+ } elsif ($pageref eq "\)" ) {
+ $pageref = '';
+ local($next) = $index{$index_key};
+# local($next) = $index{$cur_key};
+ # $next =~ s/[\|] *$//;
+ $next =~ s/(\n )?\| $//;
+ $index{$index_key} = "$next to ";
+# $index{$cur_key} = "$next to ";
+ }
+ }
+
+ if ($pageref) {
+ $pageref =~ s/\s*$//g; # remove trailing spaces
+ if (!$pageref) { $pageref = ' ' }
+ $pageref =~ s/see/<i>see <\/i> /g;
+ #
+ # RRM: 27 Dec 1996
+ # check if $pageref corresponds to a style command.
+ # If so, apply it to the $words.
+ #
+ local($tmp) = "do_cmd_$pageref";
+ if (defined &$tmp) {
+ $words = &$tmp("<#0#>$words<#0#>");
+ $words =~ s/<\#[^\#]*\#>//go;
+ $pageref = '';
+ }
+ }
+ #
+ # RRM: 25 May 1996
+ # any \label in the pageref section will have already
+ # created a label where the \index occurred.
+ # This has to be removed, so that the desired label
+ # will be found on the Index page instead.
+ #
+ if ($pageref) {
+ if ($pageref =~ /tex2html_anchor_mark/ ) {
+ $pageref =~ s/><tex2html_anchor_mark><\/A><A//g;
+ local($tmpA,$tmpB) = split("NAME=\"", $pageref);
+ ($tmpA,$tmpB) = split("\"", $tmpB);
+ $ref_files{$tmpA}='';
+ $index_labels{$tmpA} = 1;
+ }
+ #
+ # resolve and clean-up any hyperlinks in the page-ref,
+ # so they can be saved in an index.pl file
+ #
+ if ($pageref =~ /$cross_ref_mark/ ) {
+ local($label,$id,$ref_label);
+ # $pageref =~ s/$cross_ref_mark#(\w+)#(\w+)>$cross_ref_mark/
+ $pageref =~ s/$cross_ref_mark#([^#]+)#([^>]+)>$cross_ref_mark/
+ do { ($label,$id) = ($1,$2);
+ $ref_files{$label} = ''; # ???? RRM
+ if ($index_labels{$label}) { $ref_label = ''; }
+ else { $ref_label = $external_labels{$label}
+ unless ($ref_label = $ref_files{$label});
+ }
+ '"' . "$ref_label#$label" . '">' . &get_ref_mark($label,$id)}/geo;
+ }
+ $pageref =~ s/<\#[^\#>]*\#>//go;
+
+ if ($pageref eq ' ') { $index{$index_key}='@'; }
+ else { $index{$index_key} .= $pageref . "\n | "; }
+ } else {
+ local($thisref) = &make_named_href('',"$CURRENT_FILE#$br_id",$words);
+ $thisref =~ s/\n//g;
+ $index{$index_key} .= $thisref."\n | ";
+ }
+ #print "\nREF: $sort_key : $index_key :$index{$index_key}";
+
+ #join('',"<A NAME=$br_id>$anchor_invisible_mark<\/A>",$_);
+
+ "<A NAME=\"$br_id\">$anchor_invisible_mark<\/A>";
+}
+
+
+# KEC. -- Copied from makeidx.perl, then modified to do multiple indices.
+# Feeds the index entries to the output. This is called for each index to be built.
+#
+# Generates a list of lookup keys for index entries, from both %printable_keys
+# and %index keys.
+# Sorts the keys according to index-sorting rules.
+# Removes keys with a 0x01 token. (duplicates?)
+# Builds a string to go to the index file.
+# Adds the index entries to the string if they belong in this index.
+# Keeps track of which index is being worked on, so only the proper entries
+# are included.
+# Places the index just built in to the output at the proper place.
+{ my $index_number = 0;
+sub add_real_idx {
+ print "\nDoing the index ... Index Number $index_number\n";
+ local($key, @keys, $next, $index, $old_key, $old_html);
+ my ($idx_ref,$keyref);
+ # RRM, 15.6.96: index constructed from %printable_key, not %index
+ @keys = keys %printable_key;
+
+ while (/$idx_mark/) {
+ # Get the index reference from what follows the $idx_mark and
+ # remove it from the string.
+ s/$idxmark\002(.*?)\002/$idxmark/;
+ $idx_ref = $1;
+ $index = '';
+ # include non- makeidx index-entries
+ foreach $key (keys %index) {
+ next if $printable_key{$key};
+ $old_key = $key;
+ if ($key =~ s/###(.*)$//) {
+ next if $printable_key{$key};
+ push (@keys, $key);
+ $printable_key{$key} = $key;
+ if ($index{$old_key} =~ /HREF="([^"]*)"/i) {
+ $old_html = $1;
+ $old_html =~ /$dd?([^#\Q$dd\E]*)#/;
+ $old_html = $1;
+ } else { $old_html = '' }
+ $index{$key} = $index{$old_key} . $old_html."</A>\n | ";
+ };
+ }
+ @keys = sort makeidx_keysort @keys;
+ @keys = grep(!/\001/, @keys);
+ my $cnt = 0;
+ foreach $key (@keys) {
+ my ($keyref) = $key =~ /.*\002(.*)/;
+ next unless ($idx_ref eq $keyref); # KEC.
+ $index .= &add_idx_key($key);
+ $cnt++;
+ }
+ print "$cnt Index Entries Added\n";
+ $index = '<DD>'.$index unless ($index =~ /^\s*<D(D|T)>/);
+ $index_number++; # KEC.
+ if ($SHORT_INDEX) {
+ print "(compact version with Legend)";
+ local($num) = ( $index =~ s/\<D/<D/g );
+ if ($num > 50 ) {
+ s/$idx_mark/$preindex<HR><DL>\n$index\n<\/DL>$preindex/o;
+ } else {
+ s/$idx_mark/$preindex<HR><DL>\n$index\n<\/DL>/o;
+ }
+ } else {
+ s/$idx_mark/<DL COMPACT>\n$index\n<\/DL>/o; }
+ }
+}
+}
+
+# KEC. Copied from latex2html.pl and modified to support multiple indices.
+# The bibliography and the index should be treated as separate sections
+# in their own HTML files. The \bibliography{} command acts as a sectioning command
+# that has the desired effect. But when the bibliography is constructed
+# manually using the thebibliography environment, or when using the
+# theindex environment it is not possible to use the normal sectioning
+# mechanism. This subroutine inserts a \bibliography{} or a dummy
+# \textohtmlindex command just before the appropriate environments
+# to force sectioning.
+sub add_bbl_and_idx_dummy_commands {
+ local($id) = $global{'max_id'};
+
+ s/([\\]begin\s*$O\d+$C\s*thebibliography)/$bbl_cnt++; $1/eg;
+ ## if ($bbl_cnt == 1) {
+ s/([\\]begin\s*$O\d+$C\s*thebibliography)/$id++; "\\bibliography$O$id$C$O$id$C $1"/geo;
+ #}
+ $global{'max_id'} = $id;
+ # KEC. Modified to global substitution to place multiple index tokens.
+ s/[\\]begin\s*($O\d+$C)\s*theindex/\\textohtmlindex$1/go;
+ # KEC. Modified to pick up the optional argument to \printindex
+ s/[\\]printindex\s*(\[.*?\])?/
+ do { (defined $1) ? "\\textohtmlindex $1" : "\\textohtmlindex []"; } /ego;
+ &lib_add_bbl_and_idx_dummy_commands() if defined(&lib_add_bbl_and_idx_dummy_commands);
+}
+
+# KEC. Copied from latex2html.pl and modified to support multiple indices.
+# For each textohtmlindex mark found, determine the index titles and headers.
+# We place the index ref in the header so the proper index can be generated later.
+# For the default index, the index ref is blank.
+#
+# One problem is that this routine is called twice.. Once for processing the
+# command as originally seen, and once for processing the command when
+# doing the name for the index file. We can detect that by looking at the
+# id numbers (or ref) surrounding the \theindex command, and not incrementing
+# index_number unless a new id (or ref) is seen. This has the side effect of
+# having to unconventionally start the index_number at -1. But it works.
+#
+# Gets the title from the list of indices.
+# If this is the first index, save the title in $first_idx_file. This is what's referenced
+# in the navigation buttons.
+# Increment the index_number for next time.
+# If the indexname command is defined or a newcommand defined for indexname, do it.
+# Save the index TITLE in the toc
+# Save the first_idx_file into the idxfile. This goes into the nav buttons.
+# Build index_labels if needed.
+# Create the index headings and put them in the output stream.
+
+{ my $index_number = 0; # Will be incremented before use.
+ my $first_idx_file; # Static
+ my $no_increment = 0;
+
+sub do_cmd_textohtmlindex {
+ local($_) = @_;
+ my ($idxref,$idxnum,$index_name);
+
+ # We get called from make_name with the first argument = "\001noincrement". This is a sign
+ # to not increment $index_number the next time we are called. We get called twice, once
+ # my make_name and once by process_command. Unfortunately, make_name calls us just to set the name
+ # but doesn't use the result so we get called a second time by process_command. This works fine
+ # except for cases where there are multiple indices except if they aren't named, which is the case
+ # when the index is inserted by an include command in latex. In these cases we are only able to use
+ # the index number to decide which index to draw from, and we don't know how to increment that index
+ # number if we get called a variable number of times for the same index, as is the case between
+ # making html (one output file) and web (multiple output files) output formats.
+ if (/\001noincrement/) {
+ $no_increment = 1;
+ return;
+ }
+
+ # Remove (but save) the index reference
+ s/^\s*\[(.*?)\]/{$idxref = $1; "";}/e;
+
+ # If we have an $idxref, the index name was specified. In this case, we have all the
+ # information we need to carry on. Otherwise, we need to get the idxref
+ # from the $index_number and set the name to "Index".
+ if ($idxref) {
+ $index_name = $indices{'title'}{$idxref};
+ } else {
+ if (defined ($idxref = $indices{'newcmdorder'}->[$index_number])) {
+ $index_name = $indices{'title'}{$idxref};
+ } else {
+ $idxref = '';
+ $index_name = "Index";
+ }
+ }
+
+ $idx_title = "Index"; # The name displayed in the nav bar text.
+
+ # Only set $idxfile if we are at the first index. This will point the
+ # navigation panel to the first index file rather than the last.
+ $first_idx_file = $CURRENT_FILE if ($index_number == 0);
+ $idxfile = $first_idx_file; # Pointer for the Index button in the nav bar.
+ $toc_sec_title = $index_name; # Index link text in the toc.
+ $TITLE = $toc_sec_title; # Title for this index, from which its filename is built.
+ if (%index_labels) { &make_index_labels(); }
+ if (($SHORT_INDEX) && (%index_segment)) { &make_preindex(); }
+ else { $preindex = ''; }
+ local $idx_head = $section_headings{'textohtmlindex'};
+ local($heading) = join(''
+ , &make_section_heading($TITLE, $idx_head)
+ , $idx_mark, "\002", $idxref, "\002" );
+ local($pre,$post) = &minimize_open_tags($heading);
+ $index_number++ unless ($no_increment);
+ $no_increment = 0;
+ join('',"<BR>\n" , $pre, $_);
+}
+}
+
+# Returns an index key, given the key passed as the first argument.
+# Not modified for multiple indices.
+sub add_idx_key {
+ local($key) = @_;
+ local($index, $next);
+ if (($index{$key} eq '@' )&&(!($index_printed{$key}))) {
+ if ($SHORT_INDEX) { $index .= "<DD><BR>\n<DT>".&print_key."\n<DD>"; }
+ else { $index .= "<DT><DD><BR>\n<DT>".&print_key."\n<DD>"; }
+ } elsif (($index{$key})&&(!($index_printed{$key}))) {
+ if ($SHORT_INDEX) {
+ $next = "<DD>".&print_key."\n : ". &print_idx_links;
+ } else {
+ $next = "<DT>".&print_key."\n<DD>". &print_idx_links;
+ }
+ $index .= $next."\n";
+ $index_printed{$key} = 1;
+ }
+
+ if ($sub_index{$key}) {
+ local($subkey, @subkeys, $subnext, $subindex);
+ @subkeys = sort(split("\004", $sub_index{$key}));
+ if ($SHORT_INDEX) {
+ $index .= "<DD>".&print_key unless $index_printed{$key};
+ $index .= "<DL>\n";
+ } else {
+ $index .= "<DT>".&print_key."\n<DD>" unless $index_printed{$key};
+ $index .= "<DL COMPACT>\n";
+ }
+ foreach $subkey (@subkeys) {
+ $index .= &add_sub_idx_key($subkey) unless ($index_printed{$subkey});
+ }
+ $index .= "</DL>\n";
+ }
+ return $index;
+}
+
+1; # Must be present as the last line.
projects / bacula / docs / blobdiff