133 lines
4.0 KiB
C++
133 lines
4.0 KiB
C++
/*
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_NAME_TABLE_HH
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#define HB_OT_NAME_TABLE_HH
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#include "hb-open-type-private.hh"
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namespace OT {
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/*
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* name -- The Naming Table
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*/
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#define HB_OT_TAG_name HB_TAG('n','a','m','e')
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struct NameRecord
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{
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static int cmp (const NameRecord *a, const NameRecord *b)
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{
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int ret;
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ret = b->platformID.cmp (a->platformID);
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if (ret) return ret;
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ret = b->encodingID.cmp (a->encodingID);
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if (ret) return ret;
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ret = b->languageID.cmp (a->languageID);
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if (ret) return ret;
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ret = b->nameID.cmp (a->nameID);
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if (ret) return ret;
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return 0;
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}
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inline bool sanitize (hb_sanitize_context_t *c, void *base) {
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TRACE_SANITIZE (this);
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/* We can check from base all the way up to the end of string... */
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return TRACE_RETURN (c->check_struct (this) && c->check_range ((char *) base, (unsigned int) length + offset));
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}
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USHORT platformID; /* Platform ID. */
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USHORT encodingID; /* Platform-specific encoding ID. */
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USHORT languageID; /* Language ID. */
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USHORT nameID; /* Name ID. */
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USHORT length; /* String length (in bytes). */
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USHORT offset; /* String offset from start of storage area (in bytes). */
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public:
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DEFINE_SIZE_STATIC (12);
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};
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struct name
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{
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static const hb_tag_t Tag = HB_OT_TAG_name;
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inline unsigned int get_name (unsigned int platform_id,
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unsigned int encoding_id,
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unsigned int language_id,
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unsigned int name_id,
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void *buffer,
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unsigned int buffer_length) const
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{
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NameRecord key;
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key.platformID.set (platform_id);
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key.encodingID.set (encoding_id);
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key.languageID.set (language_id);
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key.nameID.set (name_id);
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NameRecord *match = (NameRecord *) bsearch (&key, nameRecord, count, sizeof (nameRecord[0]), (hb_compare_func_t) NameRecord::cmp);
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if (!match)
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return 0;
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unsigned int length = MIN (buffer_length, (unsigned int) match->length);
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memcpy (buffer, (char *) this + stringOffset + match->offset, length);
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return length;
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}
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inline bool sanitize_records (hb_sanitize_context_t *c) {
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TRACE_SANITIZE (this);
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char *string_pool = (char *) this + stringOffset;
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unsigned int _count = count;
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for (unsigned int i = 0; i < _count; i++)
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if (!nameRecord[i].sanitize (c, string_pool)) return TRACE_RETURN (false);
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return TRACE_RETURN (true);
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}
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inline bool sanitize (hb_sanitize_context_t *c) {
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TRACE_SANITIZE (this);
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return TRACE_RETURN (c->check_struct (this) &&
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likely (format == 0 || format == 1) &&
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c->check_array (nameRecord, nameRecord[0].static_size, count) &&
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sanitize_records (c));
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}
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/* We only implement format 0 for now. */
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protected:
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USHORT format; /* Format selector (=0/1). */
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USHORT count; /* Number of name records. */
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Offset stringOffset; /* Offset to start of string storage (from start of table). */
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NameRecord nameRecord[VAR]; /* The name records where count is the number of records. */
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public:
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DEFINE_SIZE_ARRAY (6, nameRecord);
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};
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} /* namespace OT */
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#endif /* HB_OT_NAME_TABLE_HH */
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