1 files changed, 132 insertions, 0 deletions
diff --git a/lib/B/Terse.pm b/lib/B/Terse.pm
new file mode 100644
index 0000000000..6489dc0afe
--- /dev/null
+++ b/lib/B/Terse.pm
@@ -0,0 +1,132 @@
+package B::Terse;
+use strict;
+use B qw(peekop class walkoptree_slow walkoptree_exec
+	 main_start main_root cstring svref_2object);
+use B::Asmdata qw(@specialsv_name);
+
+sub terse {
+    my ($order, $cvref) = @_;
+    my $cv = svref_2object($cvref);
+    if ($order eq "exec") {
+	walkoptree_exec($cv->START, "terse");
+    } else {
+	walkoptree_slow($cv->ROOT, "terse");
+    }
+}
+
+sub compile {
+    my $order = shift;
+    my @options = @_;
+    if (@options) {
+	return sub {
+	    my $objname;
+	    foreach $objname (@options) {
+		$objname = "main::$objname" unless $objname =~ /::/;
+		eval "terse(\$order, \\&$objname)";
+		die "terse($order, \\&$objname) failed: $@" if $@;
+	    }
+	}
+    } else {
+	if ($order eq "exec") {
+	    return sub { walkoptree_exec(main_start, "terse") }
+	} else {
+	    return sub { walkoptree_slow(main_root, "terse") }
+	}
+    }
+}
+
+sub indent {
+    my $level = shift;
+    return "    " x $level;
+}
+
+sub B::OP::terse {
+    my ($op, $level) = @_;
+    my $targ = $op->targ;
+    $targ = ($targ > 0) ? " [$targ]" : "";
+    print indent($level), peekop($op), $targ, "\n";
+}
+
+sub B::SVOP::terse {
+    my ($op, $level) = @_;
+    print indent($level), peekop($op), "  ";
+    $op->sv->terse(0);
+}
+
+sub B::GVOP::terse {
+    my ($op, $level) = @_;
+    print indent($level), peekop($op), "  ";
+    $op->gv->terse(0);
+}
+
+sub B::PMOP::terse {
+    my ($op, $level) = @_;
+    my $precomp = $op->precomp;
+    print indent($level), peekop($op),
+	defined($precomp) ? " /$precomp/\n" : " (regexp not compiled)\n";
+
+}
+
+sub B::PVOP::terse {
+    my ($op, $level) = @_;
+    print indent($level), peekop($op), " ", cstring($op->pv), "\n";
+}
+
+sub B::COP::terse {
+    my ($op, $level) = @_;
+    my $label = $op->label;
+    if ($label) {
+	$label = " label ".cstring($label);
+    }
+    print indent($level), peekop($op), $label, "\n";
+}
+
+sub B::PV::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s (0x%lx) %s\n", class($sv), $$sv, cstring($sv->PV);
+}
+
+sub B::AV::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s (0x%lx) FILL %d\n", class($sv), $$sv, $sv->FILL;
+}
+
+sub B::GV::terse {
+    my ($gv, $level) = @_;
+    my $stash = $gv->STASH->NAME;
+    if ($stash eq "main") {
+	$stash = "";
+    } else {
+	$stash = $stash . "::";
+    }
+    print indent($level);
+    printf "%s (0x%lx) *%s%s\n", class($gv), $$gv, $stash, $gv->NAME;
+}
+
+sub B::IV::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s (0x%lx) %d\n", class($sv), $$sv, $sv->IV;
+}
+
+sub B::NV::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s (0x%lx) %s\n", class($sv), $$sv, $sv->NV;
+}
+
+sub B::NULL::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s (0x%lx)\n", class($sv), $$sv;
+}
+    
+sub B::SPECIAL::terse {
+    my ($sv, $level) = @_;
+    print indent($level);
+    printf "%s #%d %s\n", class($sv), $$sv, $specialsv_name[$$sv];
+}
+
+1;