1 files changed, 143 insertions, 0 deletions
diff --git a/perltest b/perltest
new file mode 100755
index 0000000..7c2114b
--- /dev/null
+++ b/perltest
@@ -0,0 +1,143 @@
+#! /usr/bin/perl
+
+# Program for testing regular expressions with perl to check that PCRE handles
+# them the same.
+
+
+# Function for turning a string into a string of printing chars
+
+sub pchars {
+my($t) = "";
+
+foreach $c (split(//, @_[0]))
+  {
+  if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
+    else { $t .= sprintf("\\x%02x", ord $c); }
+  }
+$t;
+}
+
+
+
+# Read lines from named file or stdin and write to named file or stdout; lines
+# consist of a regular expression, in delimiters and optionally followed by
+# options, followed by a set of test data, terminated by an empty line.
+
+# Sort out the input and output files
+
+if (@ARGV > 0)
+  {
+  open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
+  $infile = "INFILE";
+  }
+else { $infile = "STDIN"; }
+
+if (@ARGV > 1)
+  {
+  open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
+  $outfile = "OUTFILE";
+  }
+else { $outfile = "STDOUT"; }
+
+printf($outfile "Perl Regular Expressions\n\n");
+
+# Main loop
+
+NEXT_RE:
+for (;;)
+  {
+  printf "  re> " if $infile eq "STDIN";
+  last if ! ($_ = <$infile>);
+  printf $outfile "$_" if $infile ne "STDIN";
+  next if ($_ eq "");
+
+  $pattern = $_;
+
+  $delimiter = substr($_, 0, 1);
+  while ($pattern !~ /^\s*(.).*\1/s)
+    {
+    printf "    > " if $infile eq "STDIN";
+    last if ! ($_ = <$infile>);
+    printf $outfile "$_" if $infile ne "STDIN";
+    $pattern .= $_;
+    }
+
+   chomp($pattern);
+   $pattern =~ s/\s+$//;
+
+  # Check that the pattern is valid
+
+  eval "\$_ =~ ${pattern}";
+  if ($@)
+    {
+    printf $outfile "Error: $@\n";
+    next NEXT_RE;
+    }
+
+  # Read data lines and test them
+
+  for (;;)
+    {
+    printf "data> " if $infile eq "STDIN";
+    last NEXT_RE if ! ($_ = <$infile>);
+    chomp;
+    printf $outfile "$_\n" if $infile ne "STDIN";
+
+    s/\s+$//;
+    s/^\s+//;
+
+    last if ($_ eq "");
+
+    $_ = eval "\"$_\"";   # To get escapes processed
+
+    $ok = 0;
+    eval "if (\$_ =~ ${pattern}) {" .
+         "\$z = \$&;" .
+         "\$a = \$1;" .
+         "\$b = \$2;" .
+         "\$c = \$3;" .
+         "\$d = \$4;" .
+         "\$e = \$5;" .
+         "\$f = \$6;" .
+         "\$g = \$7;" .
+         "\$h = \$8;" .
+         "\$i = \$9;" .
+         "\$j = \$10;" .
+         "\$k = \$11;" .
+         "\$l = \$12;" .
+         "\$m = \$13;" .
+         "\$n = \$14;" .
+         "\$o = \$15;" .
+         "\$p = \$16;" .
+         "\$ok = 1; }";
+
+    if ($@)
+      {
+      printf $outfile "Error: $@\n";
+      next NEXT_RE;
+      }
+    elsif (!$ok)
+      {
+      printf $outfile "No match\n";
+      }
+    else
+      {
+      @subs = ($z,$a,$b,$c,$d,$e,$f,$g,$h,$i,$j,$k,$l,$m,$n,$o,$p);
+      $last_printed = 0;
+      for ($i = 0; $i <= 17; $i++)
+        {
+        if ($i == 0 || defined $subs[$i])
+          {
+          while ($last_printed++ < $i-1)
+            { printf $outfile ("%2d: <unset>\n", $last_printed); }
+          printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
+          $last_printed = $i;
+          }
+        }
+      }
+    }
+  }
+
+printf $outfile "\n";
+
+# End