[scripts] AggSetCoord: -l option (select lines)

scripts/owlps-aggsetcoord.pl

@@ -10,7 +10,7 @@ owlps-aggsetcoord - set the coordinates in an aggregation CSV file
 B<owlps-aggsetcoord>
 [ B<-h> | B<-V> ]
 [ B<-v> ]
-[ B<-c> <I<coordinates>> ]
+[ B<-c> <I<coordinates>> [ B<-l> <I<line_selection>> ] ]
 [ B<-m> <I<mac>> ]
 [ <I<aggregation_file>> ]
 
@@ -49,17 +49,6 @@ diff tools such as I<vimdiff> to visualise the differences between the input
 file and the result and make sure it corresponds to what was expected.
 
 
-=head1 LIMITATIONS
-
-=over 3
-
-=item *
-It is not yet possible to choose an interval of lines to work on: the whole file
-is treated.
-
-=back
-
-
 =head1 OPTIONS
 
 =over 7
@@ -82,6 +71,13 @@ Apply I<coordinates> to every positioning request with default X, Y and Z. A
 line in which at least one of the three coordinates is set to a non-default
 value will be left untouched. I<coordinates> is a string "X;Y;Z".
 
+=item B<-l> <I<line_selection>>
+
+Skip lines that are not part of the selection pattern I<line_selection>, which
+is evaluated as a Perl numeric list. For example, "3, 5, 8..10" will select the
+lines 3, 5, 8, 9 and 10; "1..25,42..45" will select the lines 1 to 25 and 42 to
+77. This works only with the B<-c> option.
+
 =item B<-m> <I<mac>>
 
 Work only on positioning requests transmitted by MAC address I<mac>.
@@ -136,6 +132,10 @@ use constant BASE_COORD => "0.00";
 # Verbose mode
 my $verbose;
 
+# List of the lines to work on (will stay undefined if all the lines have to be
+# worked on)
+my %selected_lines;
+
 # Selected transmitter's MAC address (will stay undefined if -m was not used)
 my $selected_mac;
 
@@ -317,7 +317,7 @@ sub apply_interpolation($$$$$$) {
 ## Option parsing ##
 
 $Getopt::Std::STANDARD_HELP_VERSION = 1;
-use constant OPTIONS => 'c:hm:vV';
+use constant OPTIONS => 'c:hl:m:vV';
 my %options;
 if (!getopts(OPTIONS, \%options)) {
     HELP_MESSAGE(*STDERR);
@@ -343,6 +343,12 @@ if (defined($new_coordinates)) {
     ($new_x, $new_y, $new_z) = split_point_3d($new_coordinates);
 }
 
+# Register the selected lines
+if (defined($options{'l'})) {
+    die "-l option requires -c option!" if (!defined($new_coordinates));
+    $selected_lines{$_} = 1 foreach eval $options{'l'};
+}
+
 
 ## Main loop: read lines ##
 
@@ -409,6 +415,13 @@ while ($cur_line = <>) {
     # option): we print it immediately (we are sure not to have any previous
     # lines in memory, since we don't do that in this mode)
     if (defined($new_coordinates)) {
+        # Skip the line if it is not part of the selected lines
+        if (%selected_lines and !$selected_lines{$line_nb}) {
+            trace("Line not selected: skipped.\n");
+            print $cur_line;
+            next;
+        }
+
         # If the current line is fully incomplete, we reconstitute it with the
         # new coordinates
         if (is_blank($x, $y, $z)) {
@@ -428,6 +441,7 @@ while ($cur_line = <>) {
         else {
             print $cur_line;
         }
+
         # In either case, jump to the next line
         next;
     }