/*

 * 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 */