sub _min {
my $min = shift;
foreach my $v (@_) {
- if ($v < $min) {
- $v = $min;
+ if ($min > $v) {
+ $min = $v;
}
}
return $min;
}
+sub _max {
+ my $max = shift;
+ foreach my $v (@_) {
+ if ($max < $v) {
+ $max = $v;
+ }
+ }
+ return $max;
+}
+
sub _minify_to_max {
my $ref = shift;
$line = "$1 $s";
# Call self recursively to really do the command.
- return cmd_l( 'l', $s );
+ return _cmd_l_main( $s );
}
sub _cmd_l_handle_subname {
- my $cmd = shift;
my $line = shift;
my $s = $subname;
}
# Call self recursively to list the range.
- $line = $subrange;
- return cmd_l( 'l', $subrange );
+ return _cmd_l_main( $subrange );
} ## end if ($subrange)
# Couldn't find it.
$incr = $window - 1;
# Recurse to do it.
- return cmd_l( 'l', $start . '-' . ( $start + $incr ) );
+ return _cmd_l_main( $start . '-' . ( $start + $incr ) );
}
sub _cmd_l_plus {
# Create a line range we'll understand, and recurse to do it.
my $line = $start . '-' . ( $start + $incr );
- return cmd_l( 'l', $line );
+ return _cmd_l_main( $line );
}
-sub cmd_l {
- my $current_line = $line;
- my $cmd = shift;
- my $line = shift;
+sub _cmd_l_calc_initial_end_and_i {
+ my ($line, $start_match, $end_match) = @_;
- # If this is '-something', delete any spaces after the dash.
- $line =~ s/^-\s*$/-/;
+ # Determine end point; use end of file if not specified.
+ my $end = ( !defined $start_match ) ? $max :
+ ( $end_match ? $end_match : $start_match );
- # If the line is '$something', assume this is a scalar containing a
- # line number.
- # Set up for DB::eval() - evaluate in *user* context.
- if ( my ($var_name) = $line =~ /\A(\$.*)/s ) {
- return _cmd_l_handle_var_name($var_name);
- } ## end if ($line =~ /^(\$.*)/s)
+ # Go on to the end, and then stop.
+ _minify_to_max(\$end);
- # l name. Try to find a sub by that name.
- elsif ( ($subname) = $line =~ /\A([\':A-Za-z_][\':\w]*(?:\[.*\])?)/s ) {
- return _cmd_l_handle_subname($cmd, $line);
- } ## end elsif ($line =~ /^([\':A-Za-z_][\':\w]*(\[.*\])?)/s)
+ # Determine start line.
+ my $i = $start_match;
- # Bare 'l' command.
- elsif ( $line !~ /\S/ ) {
- return _cmd_l_empty();
+ if ($i eq '.') {
+ $i = $line;
}
- # l [start]+number_of_lines
- elsif ( my ($new_start, $new_incr) = $line =~ /\A(\d*)\+(\d*)\z/ ) {
+ $i = _max($i, 1);
- return _cmd_l_plus($new_start, $new_incr);
- } ## end elsif ($line =~ /^(\d*)\+(\d*)$/)
+ $incr = $end - $i;
- # l start-stop or l start,stop
- elsif ( $line =~ /^((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/ ) {
+ return ($end, $i);
+}
- # Determine end point; use end of file if not specified.
- my $end = ( !defined $2 ) ? $max : ( $4 ? $4 : $2 );
+sub _cmd_l_range {
+ my ($line, $current_line, $start_match, $end_match) = @_;
- # Go on to the end, and then stop.
- _minify_to_max(\$end);
+ my ($end, $i) =
+ _cmd_l_calc_initial_end_and_i($line, $start_match, $end_match);
- # Determine start line.
- my $i = $2;
- $i = $line if $i eq '.';
- $i = 1 if $i < 1;
- $incr = $end - $i;
+ # If we're running under a slave editor, force it to show the lines.
+ if ($slave_editor) {
+ print {$OUT} "\032\032$filename:$i:0\n";
+ $i = $end;
+ }
+ # We're doing it ourselves. We want to show the line and special
+ # markers for:
+ # - the current line in execution
+ # - whether a line is breakable or not
+ # - whether a line has a break or not
+ # - whether a line has an action or not
+ else {
+ I_TO_END:
+ for ( ; $i <= $end ; $i++ ) {
- # If we're running under a slave editor, force it to show the lines.
- if ($slave_editor) {
- print $OUT "\032\032$filename:$i:0\n";
- $i = $end;
- }
+ # Check for breakpoints and actions.
+ my ( $stop, $action );
+ if ($dbline{$i}) {
+ ( $stop, $action ) = split( /\0/, $dbline{$i} );
+ }
- # We're doing it ourselves. We want to show the line and special
- # markers for:
- # - the current line in execution
- # - whether a line is breakable or not
- # - whether a line has a break or not
- # - whether a line has an action or not
- else {
- I_TO_END:
- for ( ; $i <= $end ; $i++ ) {
+ # ==> if this is the current line in execution,
+ # : if it's breakable.
+ my $arrow =
+ ( $i == $current_line and $filename eq $filename_ini )
+ ? '==>'
+ : ( $dbline[$i] + 0 ? ':' : ' ' );
- # Check for breakpoints and actions.
- my ( $stop, $action );
- if ($dbline{$i}) {
- ( $stop, $action ) = split( /\0/, $dbline{$i} );
- }
+ # Add break and action indicators.
+ $arrow .= 'b' if $stop;
+ $arrow .= 'a' if $action;
- # ==> if this is the current line in execution,
- # : if it's breakable.
- my $arrow =
- ( $i == $current_line and $filename eq $filename_ini )
- ? '==>'
- : ( $dbline[$i] + 0 ? ':' : ' ' );
+ # Print the line.
+ print {$OUT} "$i$arrow\t", $dbline[$i];
- # Add break and action indicators.
- $arrow .= 'b' if $stop;
- $arrow .= 'a' if $action;
+ # Move on to the next line. Drop out on an interrupt.
+ if ($signal) {
+ $i++;
+ last I_TO_END;
+ }
+ } ## end for (; $i <= $end ; $i++)
- # Print the line.
- print {$OUT} "$i$arrow\t", $dbline[$i];
+ # Line the prompt up; print a newline if the last line listed
+ # didn't have a newline.
+ if ($dbline[ $i - 1 ] !~ /\n\z/) {
+ print {$OUT} "\n";
+ }
+ } ## end else [ if ($slave_editor)
- # Move on to the next line. Drop out on an interrupt.
- if ($signal) {
- $i++;
- last I_TO_END;
- }
- } ## end for (; $i <= $end ; $i++)
+ # Save the point we last listed to in case another relative 'l'
+ # command is desired. Don't let it run off the end.
+ $start = $i;
+ _minify_to_max(\$start);
- # Line the prompt up; print a newline if the last line listed
- # didn't have a newline.
- if ($dbline[ $i - 1 ] !~ /\n\z/) {
- print {$OUT} "\n";
- }
- } ## end else [ if ($slave_editor)
+ return;
+}
- # Save the point we last listed to in case another relative 'l'
- # command is desired. Don't let it run off the end.
- $start = $i;
- _minify_to_max(\$start);
+sub _cmd_l_main {
+ my $spec = shift;
- return;
- } ## end elsif ($line =~ /^((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/)
+ # If this is '-something', delete any spaces after the dash.
+ $spec =~ s/\A-\s*\z/-/;
+
+ # If the line is '$something', assume this is a scalar containing a
+ # line number.
+ # Set up for DB::eval() - evaluate in *user* context.
+ if ( my ($var_name) = $spec =~ /\A(\$.*)/s ) {
+ return _cmd_l_handle_var_name($var_name);
+ }
+ # l name. Try to find a sub by that name.
+ elsif ( ($subname) = $spec =~ /\A([\':A-Za-z_][\':\w]*(?:\[.*\])?)/s ) {
+ return _cmd_l_handle_subname($spec);
+ }
+ # Bare 'l' command.
+ elsif ( $spec !~ /\S/ ) {
+ return _cmd_l_empty();
+ }
+ # l [start]+number_of_lines
+ elsif ( my ($new_start, $new_incr) = $spec =~ /\A(\d*)\+(\d*)\z/ ) {
+ return _cmd_l_plus($new_start, $new_incr);
+ }
+ # l start-stop or l start,stop
+ elsif (my ($s, $e) = $spec =~ /^(?:(-?[\d\$\.]+)(?:[-,]([\d\$\.]+))?)?/ ) {
+ return _cmd_l_range($spec, $line, $s, $e);
+ }
+
+ return;
} ## end sub cmd_l
+sub cmd_l {
+ my (undef, $line) = @_;
+
+ return _cmd_l_main($line);
+}
+
=head3 C<cmd_L> - list breakpoints, actions, and watch expressions (command)
To list breakpoints, the command has to look determine where all of them are
https://perl5.git.perl.org / perl5.git / blobdiff