Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/tools/afblue.pl

Index: third_party/freetype2/src/src/tools/afblue.pl
diff --git a/third_party/freetype2/src/src/tools/afblue.pl b/third_party/freetype2/src/src/tools/afblue.pl
new file mode 100644
index 0000000000000000000000000000000000000000..56b6452348f68742b891082174815c737e009912
--- /dev/null
+++ b/third_party/freetype2/src/src/tools/afblue.pl
@@ -0,0 +1,548 @@
+#! /usr/bin/perl -w
+# -*- Perl -*-
+#
+# afblue.pl
+#
+# Process a blue zone character data file.
+#
+# Copyright 2013-2015 by
+# David Turner, Robert Wilhelm, and Werner Lemberg.
+#
+# This file is part of the FreeType project, and may only be used,
+# modified, and distributed under the terms of the FreeType project
+# license, LICENSE.TXT.  By continuing to use, modify, or distribute
+# this file you indicate that you have read the license and
+# understand and accept it fully.
+
+use strict;
+use warnings;
+use English '-no_match_vars';
+use open ':std', ':encoding(UTF-8)';
+
+
+my $prog = $PROGRAM_NAME;
+$prog =~ s| .* / ||x;      # Remove path.
+
+die "usage: $prog datafile < infile > outfile\n" if $#ARGV != 0;
+
+
+my $datafile = $ARGV[0];
+
+my %diversions;        # The extracted and massaged data from `datafile'.
+my @else_stack;        # Booleans to track else-clauses.
+my @name_stack;        # Stack of integers used for names of aux. variables.
+
+my $curr_enum;         # Name of the current enumeration.
+my $curr_array;        # Name of the current array.
+my $curr_max;          # Name of the current maximum value.
+
+my $curr_enum_element; # Name of the current enumeration element.
+my $curr_offset;       # The offset relative to current aux. variable.
+my $curr_elem_size;    # The size of the current string or block.
+
+my $have_sections = 0; # Boolean; set if start of a section has been seen.
+my $have_strings;      # Boolean; set if current section contains strings.
+my $have_blocks;       # Boolean; set if current section contains blocks.
+
+my $have_enum_element; # Boolean; set if we have an enumeration element.
+my $in_string;         # Boolean; set if a string has been parsed.
+
+my $num_sections = 0;  # Number of sections seen so far.
+
+my $last_aux;          # Name of last auxiliary variable.
+
+
+# Regular expressions.
+
+# [<ws>] <enum_name> <ws> <array_name> <ws> <max_name> [<ws>] ':' [<ws>] '\n'
+my $section_re = qr/ ^ \s* (\S+) \s+ (\S+) \s+ (\S+) \s* : \s* $ /x;
+
+# [<ws>] <enum_element_name> [<ws>] '\n'
+my $enum_element_re = qr/ ^ \s* ( [A-Za-z0-9_]+ ) \s* $ /x;
+
+# '#' <preprocessor directive> '\n'
+my $preprocessor_re = qr/ ^ \# /x;
+
+# [<ws>] '/' '/' <comment> '\n'
+my $comment_re = qr| ^ \s* // |x;
+
+# empty line
+my $whitespace_only_re = qr/ ^ \s* $ /x;
+
+# [<ws>] '"' <string> '"' [<ws>] '\n'  (<string> doesn't contain newlines)
+my $string_re = qr/ ^ \s*
+                       " ( (?> (?: (?> [^"\\]+ ) | \\. )* ) ) "
+                       \s* $ /x;
+
+# [<ws>] '{' <block> '}' [<ws>] '\n'  (<block> can contain newlines)
+my $block_start_re = qr/ ^ \s* \{ /x;
+
+# We need the capturing group for `split' to make it return the separator
+# tokens (i.e., the opening and closing brace) also.
+my $brace_re = qr/ ( [{}] ) /x;
+
+
+sub Warn
+{
+  my $message = shift;
+  warn "$datafile:$INPUT_LINE_NUMBER: warning: $message\n";
+}
+
+
+sub Die
+{
+  my $message = shift;
+  die "$datafile:$INPUT_LINE_NUMBER: error: $message\n";
+}
+
+
+my $warned_before = 0;
+
+sub warn_before
+{
+  Warn("data before first section gets ignored") unless $warned_before;
+  $warned_before = 1;
+}
+
+
+sub strip_newline
+{
+  chomp;
+  s/ \x0D $ //x;
+}
+
+
+sub end_curr_string
+{
+  # Append final null byte to string.
+  if ($have_strings)
+  {
+    push @{$diversions{$curr_array}}, "    '\\0',\n" if $in_string;
+
+    $curr_offset++;
+    $in_string = 0;
+  }
+}
+
+
+sub update_max_elem_size
+{
+  if ($curr_elem_size)
+  {
+    my $max = pop @{$diversions{$curr_max}};
+    $max = $curr_elem_size if $curr_elem_size > $max;
+    push @{$diversions{$curr_max}}, $max;
+  }
+}
+
+
+sub convert_non_ascii_char
+{
+  # A UTF-8 character outside of the printable ASCII range, with possibly a
+  # leading backslash character.
+  my $s = shift;
+
+  # Here we count characters, not bytes.
+  $curr_elem_size += length $s;
+
+  utf8::encode($s);
+  $s = uc unpack 'H*', $s;
+
+  $curr_offset += $s =~ s/\G(..)/'\\x$1', /sg;
+
+  return $s;
+}
+
+
+sub convert_ascii_chars
+{
+  # A series of ASCII characters in the printable range.
+  my $s = shift;
+
+  # We ignore spaces.
+  $s =~ s/ //g;
+
+  my $count = $s =~ s/\G(.)/'$1', /g;
+  $curr_offset += $count;
+  $curr_elem_size += $count;
+
+  return $s;
+}
+
+
+sub convert_literal
+{
+  my $s = shift;
+  my $orig = $s;
+
+  # ASCII printables and space
+  my $safe_re = '\x20-\x7E';
+  # ASCII printables and space, no backslash
+  my $safe_no_backslash_re = '\x20-\x5B\x5D-\x7E';
+
+  $s =~ s{
+           (?: \\? ( [^$safe_re] )
+               | ( (?: [$safe_no_backslash_re]
+                       | \\ [$safe_re] )+ ) )
+         }
+         {
+           defined($1) ? convert_non_ascii_char($1)
+                       : convert_ascii_chars($2)
+         }egx;
+
+   # We assume that `$orig' doesn't contain `*/'
+   return $s . " /* $orig */";
+}
+
+
+sub aux_name
+{
+  return "af_blue_" . $num_sections. "_" . join('_', @name_stack);
+}
+
+
+sub aux_name_next
+{
+  $name_stack[$#name_stack]++;
+  my $name = aux_name();
+  $name_stack[$#name_stack]--;
+
+  return $name;
+}
+
+
+sub enum_val_string
+{
+  # Build string that holds code to save the current offset in an
+  # enumeration element.
+  my $aux = shift;
+
+  my $add = ($last_aux eq "af_blue_" . $num_sections . "_0" )
+              ? ""
+              : "$last_aux + ";
+
+  return "    $aux = $add$curr_offset,\n";
+}
+
+
+
+# Process data file.
+
+open(DATA, $datafile) || die "$prog: can't open \`$datafile': $OS_ERROR\n";
+
+while (<DATA>)
+{
+  strip_newline();
+
+  next if /$comment_re/;
+  next if /$whitespace_only_re/;
+
+  if (/$section_re/)
+  {
+    Warn("previous section is empty") if ($have_sections
+                                          && !$have_strings
+                                          && !$have_blocks);
+
+    end_curr_string();
+    update_max_elem_size();
+
+    # Save captured groups from `section_re'.
+    $curr_enum = $1;
+    $curr_array = $2;
+    $curr_max = $3;
+
+    $curr_enum_element = "";
+    $curr_offset = 0;
+
+    Warn("overwriting already defined enumeration \`$curr_enum'")
+      if exists($diversions{$curr_enum});
+    Warn("overwriting already defined array \`$curr_array'")
+      if exists($diversions{$curr_array});
+    Warn("overwriting already defined maximum value \`$curr_max'")
+      if exists($diversions{$curr_max});
+
+    $diversions{$curr_enum} = [];
+    $diversions{$curr_array} = [];
+    $diversions{$curr_max} = [];
+
+    push @{$diversions{$curr_max}}, 0;
+
+    @name_stack = ();
+    push @name_stack, 0;
+
+    $have_sections = 1;
+    $have_strings = 0;
+    $have_blocks = 0;
+
+    $have_enum_element = 0;
+    $in_string = 0;
+
+    $num_sections++;
+    $curr_elem_size = 0;
+
+    $last_aux = aux_name();
+
+    next;
+  }
+
+  if (/$preprocessor_re/)
+  {
+    if ($have_sections)
+    {
+      # Having preprocessor conditionals complicates the computation of
+      # correct offset values.  We have to introduce auxiliary enumeration
+      # elements with the name `af_blue_<s>_<n1>_<n2>_...' that store
+      # offsets to be used in conditional clauses.  `<s>' is the number of
+      # sections seen so far, `<n1>' is the number of `#if' and `#endif'
+      # conditionals seen so far in the topmost level, `<n2>' the number of
+      # `#if' and `#endif' conditionals seen so far one level deeper, etc.
+      # As a consequence, uneven values are used within a clause, and even
+      # values after a clause, since the C standard doesn't allow the
+      # redefinition of an enumeration value.  For example, the name
+      # `af_blue_5_1_6' is used to construct enumeration values in the fifth
+      # section after the third (second-level) if-clause within the first
+      # (top-level) if-clause.  After the first top-level clause has
+      # finished, `af_blue_5_2' is used.  The current offset is then
+      # relative to the value stored in the current auxiliary element.
+
+      if (/ ^ \# \s* if /x)
+      {
+        push @else_stack, 0;
+
+        $name_stack[$#name_stack]++;
+
+        push @{$diversions{$curr_enum}}, enum_val_string(aux_name());
+        $last_aux = aux_name();
+
+        push @name_stack, 0;
+
+        $curr_offset = 0;
+      }
+      elsif (/ ^ \# \s* elif /x)
+      {
+        Die("unbalanced #elif") unless @else_stack;
+
+        pop @name_stack;
+
+        push @{$diversions{$curr_enum}}, enum_val_string(aux_name_next());
+        $last_aux = aux_name();
+
+        push @name_stack, 0;
+
+        $curr_offset = 0;
+      }
+      elsif (/ ^ \# \s* else /x)
+      {
+        my $prev_else = pop @else_stack;
+        Die("unbalanced #else") unless defined($prev_else);
+        Die("#else already seen") if $prev_else;
+        push @else_stack, 1;
+
+        pop @name_stack;
+
+        push @{$diversions{$curr_enum}}, enum_val_string(aux_name_next());
+        $last_aux = aux_name();
+
+        push @name_stack, 0;
+
+        $curr_offset = 0;
+      }
+      elsif (/ ^ (\# \s*) endif /x)
+      {
+        my $prev_else = pop @else_stack;
+        Die("unbalanced #endif") unless defined($prev_else);
+
+        pop @name_stack;
+
+        # If there is no else-clause for an if-clause, we add one.  This is
+        # necessary to have correct offsets.
+        if (!$prev_else)
+        {
+          # Use amount of whitespace from `endif'.
+          push @{$diversions{$curr_enum}}, enum_val_string(aux_name_next())
+                                           . $1 . "else\n";
+          $last_aux = aux_name();
+
+          $curr_offset = 0;
+        }
+
+        $name_stack[$#name_stack]++;
+
+        push @{$diversions{$curr_enum}}, enum_val_string(aux_name());
+        $last_aux = aux_name();
+
+        $curr_offset = 0;
+      }
+
+      # Handle (probably continued) preprocessor lines.
+    CONTINUED_LOOP:
+      {
+        do
+        {
+          strip_newline();
+
+          push @{$diversions{$curr_enum}}, $ARG . "\n";
+          push @{$diversions{$curr_array}}, $ARG . "\n";
+
+          last CONTINUED_LOOP unless / \\ $ /x;
+
+        } while (<DATA>);
+      }
+    }
+    else
+    {
+      warn_before();
+    }
+
+    next;
+  }
+
+  if (/$enum_element_re/)
+  {
+    end_curr_string();
+    update_max_elem_size();
+
+    $curr_enum_element = $1;
+    $have_enum_element = 1;
+    $curr_elem_size = 0;
+
+    next;
+  }
+
+  if (/$string_re/)
+  {
+    if ($have_sections)
+    {
+      Die("strings and blocks can't be mixed in a section") if $have_blocks;
+
+      # Save captured group from `string_re'.
+      my $string = $1;
+
+      if ($have_enum_element)
+      {
+        push @{$diversions{$curr_enum}}, enum_val_string($curr_enum_element);
+        $have_enum_element = 0;
+      }
+
+      $string = convert_literal($string);
+
+      push @{$diversions{$curr_array}}, "    $string\n";
+
+      $have_strings = 1;
+      $in_string = 1;
+    }
+    else
+    {
+      warn_before();
+    }
+
+    next;
+  }
+
+  if (/$block_start_re/)
+  {
+    if ($have_sections)
+    {
+      Die("strings and blocks can't be mixed in a section") if $have_strings;
+
+      my $depth = 0;
+      my $block = "";
+      my $block_end = 0;
+
+      # Count braces while getting the block.
+    BRACE_LOOP:
+      {
+        do
+        {
+          strip_newline();
+
+          foreach my $substring (split(/$brace_re/))
+          {
+            if ($block_end)
+            {
+              Die("invalid data after last matching closing brace")
+                if $substring !~ /$whitespace_only_re/;
+            }
+
+            $block .= $substring;
+
+            if ($substring eq '{')
+            {
+              $depth++;
+            }
+            elsif ($substring eq '}')
+            {
+              $depth--;
+
+              $block_end = 1 if $depth == 0;
+            }
+          }
+
+          # If we are here, we have run out of substrings, so get next line
+          # or exit.
+          last BRACE_LOOP if $block_end;
+
+          $block .= "\n";
+
+        } while (<DATA>);
+      }
+
+      if ($have_enum_element)
+      {
+        push @{$diversions{$curr_enum}}, enum_val_string($curr_enum_element);
+        $have_enum_element = 0;
+      }
+
+      push @{$diversions{$curr_array}}, $block . ",\n";
+
+      $curr_offset++;
+      $curr_elem_size++;
+
+      $have_blocks = 1;
+    }
+    else
+    {
+      warn_before();
+    }
+
+    next;
+  }
+
+  # Garbage.  We weren't able to parse the data.
+  Die("syntax error");
+}
+
+# Finalize data.
+end_curr_string();
+update_max_elem_size();
+
+
+# Filter stdin to stdout, replacing `@...@' templates.
+
+sub emit_diversion
+{
+  my $diversion_name = shift;
+  return (exists($diversions{$1})) ? "@{$diversions{$1}}"
+                                   : "@" . $diversion_name . "@";
+}
+
+
+$LIST_SEPARATOR = '';
+
+my $s1 = "This file has been generated by the Perl script \`$prog',";
+my $s1len = length $s1;
+my $s2 = "using data from file \`$datafile'.";
+my $s2len = length $s2;
+my $slen = ($s1len > $s2len) ? $s1len : $s2len;
+
+print "/* " . $s1 . " " x ($slen - $s1len) . " */\n"
+      . "/* " . $s2 . " " x ($slen - $s2len) . " */\n"
+      . "\n";
+
+while (<STDIN>)
+{
+  s/ @ ( [A-Za-z0-9_]+? ) @ / emit_diversion($1) /egx;
+  print;
+}
+
+# EOF