harfbuzz/src/hb-ot-name-table.hh

139 lines
4.3 KiB
C++
Raw Normal View History

2011-08-06 02:34:50 +02:00
/*
* Copyright © 2011,2012 Google, Inc.
2011-08-06 02:34:50 +02:00
*
* 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
2011-08-06 02:34:50 +02:00
#include "hb-open-type-private.hh"
namespace OT {
2011-08-06 02:34:50 +02:00
/*
* name -- Naming
* https://docs.microsoft.com/en-us/typography/opentype/spec/name
2011-08-06 02:34:50 +02:00
*/
#define HB_OT_TAG_name HB_TAG('n','a','m','e')
2011-08-17 14:43:45 +02:00
2011-08-06 02:34:50 +02:00
struct NameRecord
{
static int cmp (const void *pa, const void *pb)
{
const NameRecord *a = (const NameRecord *) pa;
const NameRecord *b = (const NameRecord *) pb;
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
{
2012-11-23 21:32:14 +01:00
TRACE_SANITIZE (this);
2011-08-06 02:34:50 +02:00
/* 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));
2011-08-06 02:34:50 +02:00
}
HBUINT16 platformID; /* Platform ID. */
HBUINT16 encodingID; /* Platform-specific encoding ID. */
HBUINT16 languageID; /* Language ID. */
HBUINT16 nameID; /* Name ID. */
HBUINT16 length; /* String length (in bytes). */
HBUINT16 offset; /* String offset from start of storage area (in bytes). */
2011-08-06 02:34:50 +02:00
public:
DEFINE_SIZE_STATIC (12);
};
struct name
{
2013-09-09 21:43:10 +02:00
static const hb_tag_t tableTag = HB_OT_TAG_name;
2011-08-06 02:34:50 +02:00
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);
2017-10-30 00:01:47 +01:00
NameRecord *match = (NameRecord *) bsearch (&key, nameRecord, count, sizeof (nameRecord[0]), NameRecord::cmp);
if (!match)
return 0;
unsigned int length = MIN (buffer_length, (unsigned int) match->length);
2011-08-07 06:00:27 +02:00
memcpy (buffer, (char *) this + stringOffset + match->offset, length);
return length;
}
2013-07-21 23:05:02 +02:00
inline unsigned int get_size (void) const
{ return min_size + count * nameRecord[0].min_size; }
2015-03-04 21:03:39 +01:00
inline bool sanitize_records (hb_sanitize_context_t *c) const {
2012-11-23 21:32:14 +01:00
TRACE_SANITIZE (this);
2011-08-17 14:47:41 +02:00
char *string_pool = (char *) this + stringOffset;
2011-08-06 02:34:50 +02:00
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);
2011-08-06 02:34:50 +02:00
}
inline bool sanitize (hb_sanitize_context_t *c) const
{
2012-11-23 21:32:14 +01:00
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));
2011-08-06 02:34:50 +02:00
}
/* We only implement format 0 for now. */
HBUINT16 format; /* Format selector (=0/1). */
HBUINT16 count; /* Number of name records. */
2017-11-15 06:09:03 +01:00
Offset16 stringOffset; /* Offset to start of string storage (from start of table). */
2011-08-06 02:34:50 +02:00
NameRecord nameRecord[VAR]; /* The name records where count is the number of records. */
public:
DEFINE_SIZE_ARRAY (6, nameRecord);
};
2012-11-17 03:49:54 +01:00
} /* namespace OT */
2011-08-06 02:34:50 +02:00
#endif /* HB_OT_NAME_TABLE_HH */