Setting $_ to multiline glob in @INC filter

[perl5.git] / lib / dumpvar.pl

diff --git a/lib/dumpvar.pl b/lib/dumpvar.pl
index fa5b4df..91153ea 100644 (file)
--- a/lib/dumpvar.pl
+++ b/lib/dumpvar.pl
@@ -1,4 +1,4 @@
-require 5.002;                 # For (defined ref)
+require 5.014;                 # For more reliable $@ after eval
 package dumpvar;
 
 # Needed for PrettyPrinter only:
@@ -37,12 +37,18 @@ sub main::dumpValue {
 # This one is good for variable names:
 
 sub unctrl {
-       local($_) = @_;
+    for (my($dummy) = shift) {
        local($v) ; 
 
        return \$_ if ref \$_ eq "GLOB";
-       s/([\001-\037\177])/'^'.pack('c',ord($1)^64)/eg;
-       $_;
+        if (ord('A') == 193) { # EBCDIC.
+           # EBCDIC has no concept of "\cA" or "A" being related
+           # to each other by a linear/boolean mapping.
+       } else {
+           s/([\001-\037\177])/'^'.pack('c',ord($1)^64)/eg;
+       }
+       return $_;
+    }
 }
 
 sub uniescape {
@@ -52,7 +58,17 @@ sub uniescape {
 }
 
 sub stringify {
-       local($_,$noticks) = @_;
+  my $string;
+  if (eval { $string = _stringify(@_); 1 }) {
+    return $string;
+  }
+
+  return "<< value could not be dumped: $@ >>";
+}
+
+sub _stringify {
+    (my $__, local $noticks) = @_;
+    for ($__) {
        local($v) ; 
        my $tick = $tick;
 
@@ -63,11 +79,19 @@ sub stringify {
            and %overload:: and defined &{'overload::StrVal'};
        
        if ($tick eq 'auto') {
-         if (/[\000-\011\013-\037\177]/) {
-           $tick = '"';
-         }else {
-           $tick = "'";
-         }
+           if (ord('A') == 193) {
+               if (/[\000-\011]/ or /[\013-\024\31-\037\177]/) {
+                   $tick = '"';
+               } else {
+                   $tick = "'";
+               }
+            }  else {
+               if (/[\000-\011\013-\037\177]/) {
+                   $tick = '"';
+               } else {
+                   $tick = "'";
+               }
+           }
        }
        if ($tick eq "'") {
          s/([\'\\])/\\$1/g;
@@ -80,13 +104,18 @@ sub stringify {
        } elsif ($unctrl eq 'quote') {
          s/([\"\\\$\@])/\\$1/g if $tick eq '"';
          s/\033/\\e/g;
-         s/([\000-\037\177])/'\\c'._escaped_ord($1)/eg;
+         if (ord('A') == 193) { # EBCDIC.
+             s/([\000-\037\177])/'\\c'.chr(193)/eg; # Unfinished.
+         } else {
+             s/([\000-\037\177])/'\\c'._escaped_ord($1)/eg;
+         }
        }
        $_ = uniescape($_);
        s/([\200-\377])/'\\'.sprintf('%3o',ord($1))/eg if $quoteHighBit;
-       ($noticks || /^\d+(\.\d*)?\Z/) 
+       return ($noticks || /^\d+(\.\d*)?\Z/) 
          ? $_ 
          : $tick . $_ . $tick;
+    }
 }
 
 # Ensure a resulting \ is escaped to be \\
@@ -140,6 +169,7 @@ sub unwrap {
     $sp = " " x $s ;
     $s += 3 ; 
 
+    eval {
     # Check for reused addresses
     if (ref $v) { 
       my $val = $v;
@@ -148,8 +178,7 @@ sub unwrap {
       # Match type and address.                      
       # Unblessed references will look like TYPE(0x...)
       # Blessed references will look like Class=TYPE(0x...)
-      ($start_part, $val) = split /=/,$val;
-      $val = $start_part unless defined $val;
+      $val =~ s/^.*=//; # suppress the Class part, just keep TYPE(0x...)
       ($item_type, $address) = 
         $val =~ /([^\(]+)        # Keep stuff that's     
                                  # not an open paren
@@ -234,7 +263,7 @@ sub unwrap {
          if ($#$v >= 0) {
            $short = $sp . "0..$#{$v}  " . 
              join(" ", 
-                  map {exists $v->[$_] ? stringify $v->[$_] : "empty"} ($[..$tArrayDepth)
+                  map {exists $v->[$_] ? stringify $v->[$_] : "empty"} (0..$tArrayDepth)
                  ) . "$shortmore";
          } else {
            $short = $sp . "empty array";
@@ -245,7 +274,7 @@ sub unwrap {
        #  print "$short\n";
        #  return;
        #}
-       for $num ($[ .. $tArrayDepth) {
+       for $num (0 .. $tArrayDepth) {
            return if $DB::signal;
            print "$sp$num  ";
            if (exists $v->[$num]) {
@@ -293,6 +322,12 @@ sub unwrap {
        print( (' ' x $s) .  "FileHandle({$v}) => fileno($fileno)\n" );
       }
     }
+    };
+    if ($@) {
+      print( (' ' x $s) .  "<< value could not be dumped: $@ >>\n");
+    }
+
+    return;
 }
 
 sub matchlex {
@@ -326,7 +361,7 @@ sub unctrlSet {
     if ($in eq 'unctrl' or $in eq 'quote') {
       $unctrl = $in;
     } else {
-      print "Unknown value for `unctrl'.\n";
+      print "Unknown value for 'unctrl'.\n";
     }
   }
   $unctrl;