kc3-lang/harfbuzz/src/graph/coverage-graph.hh

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• Hash : a0b8893e
  Author :
  Date : 2022-07-29T19:58:51
  

  [repacker] add Coverage sanitize.
  

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• src/graph/coverage-graph.hh

• /*
   * Copyright © 2022  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.
   *
   * Google Author(s): Garret Rieger
   */
  
  #include "graph.hh"
  #include "../OT/Layout/Common/Coverage.hh"
  
  #ifndef GRAPH_COVERAGE_GRAPH_HH
  #define GRAPH_COVERAGE_GRAPH_HH
  
  namespace graph {
  
  struct CoverageFormat1 : public OT::Layout::Common::CoverageFormat1_3<SmallTypes>
  {
    bool sanitize (graph_t::vertex_t& vertex) const
    {
      int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
      constexpr unsigned min_size = OT::Layout::Common::CoverageFormat1_3<SmallTypes>::min_size;
      if (vertex_len < min_size) return false;
      return vertex_len >= min_size + glyphArray.get_size () - glyphArray.len.get_size ();
    }
  };
  
  struct CoverageFormat2 : public OT::Layout::Common::CoverageFormat2_4<SmallTypes>
  {
    bool sanitize (graph_t::vertex_t& vertex) const
    {
      int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
      constexpr unsigned min_size = OT::Layout::Common::CoverageFormat2_4<SmallTypes>::min_size;
      if (vertex_len < min_size) return false;
      return vertex_len >= min_size + rangeRecord.get_size () - rangeRecord.len.get_size ();
    }
  };
  
  struct Coverage : public OT::Layout::Common::Coverage
  {
    bool sanitize (graph_t::vertex_t& vertex) const
    {
      int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
      if (vertex_len < OT::Layout::Common::Coverage::min_size) return false;
      switch (u.format)
      {
      case 1: return ((CoverageFormat1*)this)->sanitize (vertex);
      case 2: return ((CoverageFormat2*)this)->sanitize (vertex);
  #ifndef HB_NO_BORING_EXPANSION
      // Not currently supported
      case 3:
      case 4:
  #endif
      default: return false;
      }
    }
  };
  
  
  }
  
  #endif  // GRAPH_COVERAGE_GRAPH_HH
  

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