Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 239 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh
new file mode 100644
index 0000000000..fa501d659d
--- /dev/null
+++ b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh
@@ -0,0 +1,239 @@
+/*
+ * Copyright © 2007,2008,2009  Red Hat, Inc.
+ * Copyright © 2010,2012  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod, Garret Rieger
+ */
+
+#ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH
+#define OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH
+
+#include "RangeRecord.hh"
+
+namespace OT {
+namespace Layout {
+namespace Common {
+
+template <typename Types>
+struct CoverageFormat2_4
+{
+  friend struct Coverage;
+
+  protected:
+  HBUINT16      coverageFormat; /* Format identifier--format = 2 */
+  SortedArray16Of<RangeRecord<Types>>
+                rangeRecord;    /* Array of glyph ranges--ordered by
+                                 * Start GlyphID. rangeCount entries
+                                 * long */
+  public:
+  DEFINE_SIZE_ARRAY (4, rangeRecord);
+
+  private:
+
+  bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (rangeRecord.sanitize (c));
+  }
+
+  unsigned int get_coverage (hb_codepoint_t glyph_id) const
+  {
+    const RangeRecord<Types> &range = rangeRecord.bsearch (glyph_id);
+    return likely (range.first <= range.last)
+         ? (unsigned int) range.value + (glyph_id - range.first)
+         : NOT_COVERED;
+  }
+
+  unsigned get_population () const
+  {
+    typename Types::large_int ret = 0;
+    for (const auto &r : rangeRecord)
+      ret += r.get_population ();
+    return ret > UINT_MAX ? UINT_MAX : (unsigned) ret;
+  }
+
+  template <typename Iterator,
+      hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
+  bool serialize (hb_serialize_context_t *c, Iterator glyphs)
+  {
+    TRACE_SERIALIZE (this);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
+
+    unsigned num_ranges = 0;
+    hb_codepoint_t last = (hb_codepoint_t) -2;
+    for (auto g: glyphs)
+    {
+      if (last + 1 != g)
+        num_ranges++;
+      last = g;
+    }
+
+    if (unlikely (!rangeRecord.serialize (c, num_ranges))) return_trace (false);
+    if (!num_ranges) return_trace (true);
+
+    unsigned count = 0;
+    unsigned range = (unsigned) -1;
+    last = (hb_codepoint_t) -2;
+    unsigned unsorted = false;
+    for (auto g: glyphs)
+    {
+      if (last + 1 != g)
+      {
+	if (unlikely (last != (hb_codepoint_t) -2 && last + 1 > g))
+	  unsorted = true;
+
+        range++;
+        rangeRecord.arrayZ[range].first = g;
+        rangeRecord.arrayZ[range].value = count;
+      }
+      rangeRecord.arrayZ[range].last = g;
+      last = g;
+      count++;
+    }
+
+    if (unlikely (unsorted))
+      rangeRecord.as_array ().qsort (RangeRecord<Types>::cmp_range);
+
+    return_trace (true);
+  }
+
+  bool intersects (const hb_set_t *glyphs) const
+  {
+    if (rangeRecord.len > glyphs->get_population () * hb_bit_storage ((unsigned) rangeRecord.len) / 2)
+    {
+      for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);)
+        if (get_coverage (g) != NOT_COVERED)
+	  return true;
+      return false;
+    }
+
+    return hb_any (+ hb_iter (rangeRecord)
+                   | hb_map ([glyphs] (const RangeRecord<Types> &range) { return range.intersects (*glyphs); }));
+  }
+  bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const
+  {
+    auto *range = rangeRecord.as_array ().bsearch (index);
+    if (range)
+      return range->intersects (*glyphs);
+    return false;
+  }
+
+  template <typename IterableOut,
+	    hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))>
+  void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const
+  {
+    /* Break out of loop for overlapping, broken, tables,
+     * to avoid fuzzer timouts. */
+    hb_codepoint_t last = 0;
+    for (const auto& range : rangeRecord)
+    {
+      if (unlikely (range.first < last))
+        break;
+      last = range.last;
+      for (hb_codepoint_t g = range.first - 1;
+	   glyphs.next (&g) && g <= last;)
+	intersect_glyphs << g;
+    }
+  }
+
+  template <typename set_t>
+  bool collect_coverage (set_t *glyphs) const
+  {
+    for (const auto& range: rangeRecord)
+      if (unlikely (!range.collect_coverage (glyphs)))
+        return false;
+    return true;
+  }
+
+  public:
+  /* Older compilers need this to be public. */
+  struct iter_t
+  {
+    void init (const CoverageFormat2_4 &c_)
+    {
+      c = &c_;
+      coverage = 0;
+      i = 0;
+      j = c->rangeRecord.len ? c->rangeRecord[0].first : 0;
+      if (unlikely (c->rangeRecord[0].first > c->rangeRecord[0].last))
+      {
+        /* Broken table. Skip. */
+        i = c->rangeRecord.len;
+        j = 0;
+      }
+    }
+    bool __more__ () const { return i < c->rangeRecord.len; }
+    void __next__ ()
+    {
+      if (j >= c->rangeRecord[i].last)
+      {
+        i++;
+        if (__more__ ())
+        {
+          unsigned int old = coverage;
+          j = c->rangeRecord.arrayZ[i].first;
+          coverage = c->rangeRecord.arrayZ[i].value;
+          if (unlikely (coverage != old + 1))
+          {
+            /* Broken table. Skip. Important to avoid DoS.
+             * Also, our callers depend on coverage being
+             * consecutive and monotonically increasing,
+             * ie. iota(). */
+           i = c->rangeRecord.len;
+           j = 0;
+           return;
+          }
+        }
+        else
+          j = 0;
+        return;
+      }
+      coverage++;
+      j++;
+    }
+    hb_codepoint_t get_glyph () const { return j; }
+    bool operator != (const iter_t& o) const
+    { return i != o.i || j != o.j; }
+    iter_t __end__ () const
+    {
+      iter_t it;
+      it.init (*c);
+      it.i = c->rangeRecord.len;
+      it.j = 0;
+      return it;
+    }
+
+    private:
+    const struct CoverageFormat2_4 *c;
+    unsigned int i, coverage;
+    hb_codepoint_t j;
+  };
+  private:
+};
+
+}
+}
+}
+
+#endif  // #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH