/*

 * Copyright © 2011,2012  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.

 *

 * Google Author(s): Behdad Esfahbod

 */

#ifndef HB_OT_NAME_TABLE_HH

#define HB_OT_NAME_TABLE_HH

#include "hb-open-type-private.hh"

namespace OT {

/*

 * name -- The Naming Table

 */

#define HB_OT_TAG_name HB_TAG('n','a','m','e')

struct NameRecord

{

  static int cmp (const NameRecord *a, const NameRecord *b)

  {

    int ret;

    ret = b->platformID.cmp (a->platformID);

    if (ret) return ret;

    ret = b->encodingID.cmp (a->encodingID);

    if (ret) return ret;

    ret = b->languageID.cmp (a->languageID);

    if (ret) return ret;

    ret = b->nameID.cmp (a->nameID);

    if (ret) return ret;

    return 0;

  }

  inline bool sanitize (hb_sanitize_context_t *c, const void *base) const

  {

    TRACE_SANITIZE (this);

    /* We can check from base all the way up to the end of string... */

    return_trace (c->check_struct (this) && c->check_range ((char *) base, (unsigned int) length + offset));

  }

  USHORT	platformID;	/* Platform ID. */

  USHORT	encodingID;	/* Platform-specific encoding ID. */

  USHORT	languageID;	/* Language ID. */

  USHORT	nameID;		/* Name ID. */

  USHORT	length;		/* String length (in bytes). */

  USHORT	offset;		/* String offset from start of storage area (in bytes). */

  public:

  DEFINE_SIZE_STATIC (12);

};

struct name

{

  static const hb_tag_t tableTag	= HB_OT_TAG_name;

  inline unsigned int get_name (unsigned int platform_id,

				unsigned int encoding_id,

				unsigned int language_id,

				unsigned int name_id,

				void *buffer,

				unsigned int buffer_length) const

  {

    NameRecord key;

    key.platformID.set (platform_id);

    key.encodingID.set (encoding_id);

    key.languageID.set (language_id);

    key.nameID.set (name_id);

    NameRecord *match = (NameRecord *) bsearch (&key, nameRecord, count, sizeof (nameRecord[0]), (hb_compare_func_t) NameRecord::cmp);

    if (!match)

      return 0;

    unsigned int length = MIN (buffer_length, (unsigned int) match->length);

    memcpy (buffer, (char *) this + stringOffset + match->offset, length);

    return length;

  }

  inline unsigned int get_size (void) const

  { return min_size + count * nameRecord[0].min_size; }

  inline bool sanitize_records (hb_sanitize_context_t *c) const {

    TRACE_SANITIZE (this);

    char *string_pool = (char *) this + stringOffset;

    unsigned int _count = count;

    for (unsigned int i = 0; i < _count; i++)

      if (!nameRecord[i].sanitize (c, string_pool)) return_trace (false);

    return_trace (true);

  }

  inline bool sanitize (hb_sanitize_context_t *c) const

  {

    TRACE_SANITIZE (this);

    return_trace (c->check_struct (this) &&

		  likely (format == 0 || format == 1) &&

		  c->check_array (nameRecord, nameRecord[0].static_size, count) &&

		  sanitize_records (c));

  }

  /* We only implement format 0 for now. */

  USHORT	format;			/* Format selector (=0/1). */

  USHORT	count;			/* Number of name records. */

  Offset<>	stringOffset;		/* Offset to start of string storage (from start of table). */

  NameRecord	nameRecord[VAR];	/* The name records where count is the number of records. */

  public:

  DEFINE_SIZE_ARRAY (6, nameRecord);

};

} /* namespace OT */

#endif /* HB_OT_NAME_TABLE_HH */