kc3-lang/harfbuzz/src/hb-aat-ltag-table.hh

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• Hash : ef006549
  Author :
  Date : 2019-01-22T12:08:57
  

  Convert tag enum class consts to static constexpr
  
  Part of https://github.com/harfbuzz/harfbuzz/issues/1553
  

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• src/hb-aat-ltag-table.hh

• /*
   * Copyright © 2018  Ebrahim Byagowi
   *
   *  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.
   */
  
  #ifndef HB_AAT_LTAG_TABLE_HH
  #define HB_AAT_LTAG_TABLE_HH
  
  #include "hb-open-type.hh"
  
  /*
   * ltag -- Language Tag
   * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ltag.html
   */
  #define HB_AAT_TAG_ltag HB_TAG('l','t','a','g')
  
  
  namespace AAT {
  
  using namespace OT;
  
  
  struct FTStringRange
  {
    friend struct ltag;
  
    bool sanitize (hb_sanitize_context_t *c, const void *base) const
    {
      TRACE_SANITIZE (this);
      return_trace (c->check_struct (this) && (base+tag).sanitize (c, length));
    }
  
    protected:
    NNOffsetTo<UnsizedArrayOf<HBUINT8> >
  		tag;		/* Offset from the start of the table to
  				 * the beginning of the string */
    HBUINT16	length;		/* String length (in bytes) */
    public:
    DEFINE_SIZE_STATIC (4);
  };
  
  struct ltag
  {
    static constexpr hb_tag_t tableTag = HB_AAT_TAG_ltag;
  
    hb_language_t get_language (unsigned int i) const
    {
      const FTStringRange &range = tagRanges[i];
      return hb_language_from_string ((const char *) (this+range.tag).arrayZ,
  				    range.length);
    }
  
    bool sanitize (hb_sanitize_context_t *c) const
    {
      TRACE_SANITIZE (this);
      return_trace (likely (c->check_struct (this) &&
  			  version >= 1 &&
  			  tagRanges.sanitize (c, this)));
    }
  
    protected:
    HBUINT32	version;	/* Table version; currently 1 */
    HBUINT32	flags;		/* Table flags; currently none defined */
    LArrayOf<FTStringRange>
  		tagRanges;	/* Range for each tag's string */
    public:
    DEFINE_SIZE_ARRAY (12, tagRanges);
  };
  
  } /* namespace AAT */
  
  
  #endif /* HB_AAT_LTAG_TABLE_HH */
  

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