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| 1 /* |
| 2 * Copyright © 2011 Google, Inc. |
| 3 * |
| 4 * This is part of HarfBuzz, a text shaping library. |
| 5 * |
| 6 * Permission is hereby granted, without written agreement and without |
| 7 * license or royalty fees, to use, copy, modify, and distribute this |
| 8 * software and its documentation for any purpose, provided that the |
| 9 * above copyright notice and the following two paragraphs appear in |
| 10 * all copies of this software. |
| 11 * |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| 16 * DAMAGE. |
| 17 * |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 23 * |
| 24 * Google Author(s): Behdad Esfahbod |
| 25 */ |
| 26 |
| 27 #ifndef HB_OT_NAME_TABLE_HH |
| 28 #define HB_OT_NAME_TABLE_HH |
| 29 |
| 30 #include "hb-open-type-private.hh" |
| 31 |
| 32 |
| 33 |
| 34 /* |
| 35 * name -- The Naming Table |
| 36 */ |
| 37 |
| 38 #define HB_OT_TAG_name HB_TAG('n','a','m','e') |
| 39 |
| 40 |
| 41 struct NameRecord |
| 42 { |
| 43 static int cmp (const NameRecord *a, const NameRecord *b) |
| 44 { |
| 45 int ret; |
| 46 ret = b->platformID.cmp (a->platformID); |
| 47 if (ret) return ret; |
| 48 ret = b->encodingID.cmp (a->encodingID); |
| 49 if (ret) return ret; |
| 50 ret = b->languageID.cmp (a->languageID); |
| 51 if (ret) return ret; |
| 52 ret = b->nameID.cmp (a->nameID); |
| 53 if (ret) return ret; |
| 54 return 0; |
| 55 } |
| 56 |
| 57 inline bool sanitize (hb_sanitize_context_t *c, void *base) { |
| 58 TRACE_SANITIZE (); |
| 59 /* We can check from base all the way up to the end of string... */ |
| 60 return c->check_struct (this) && |
| 61 c->check_range ((char *) base, (unsigned int) length + offset); |
| 62 } |
| 63 |
| 64 USHORT platformID; /* Platform ID. */ |
| 65 USHORT encodingID; /* Platform-specific encoding ID. */ |
| 66 USHORT languageID; /* Language ID. */ |
| 67 USHORT nameID; /* Name ID. */ |
| 68 USHORT length; /* String length (in bytes). */ |
| 69 USHORT offset; /* String offset from start of storage area (in
bytes). */ |
| 70 public: |
| 71 DEFINE_SIZE_STATIC (12); |
| 72 }; |
| 73 |
| 74 struct name |
| 75 { |
| 76 static const hb_tag_t Tag = HB_OT_TAG_name; |
| 77 |
| 78 inline unsigned int get_name (unsigned int platform_id, |
| 79 unsigned int encoding_id, |
| 80 unsigned int language_id, |
| 81 unsigned int name_id, |
| 82 void *buffer, |
| 83 unsigned int buffer_length) const |
| 84 { |
| 85 NameRecord key; |
| 86 key.platformID.set (platform_id); |
| 87 key.encodingID.set (encoding_id); |
| 88 key.languageID.set (language_id); |
| 89 key.nameID.set (name_id); |
| 90 NameRecord *match = (NameRecord *) bsearch (&key, nameRecord, count, sizeof
(nameRecord[0]), (hb_compare_func_t) NameRecord::cmp); |
| 91 |
| 92 if (!match) |
| 93 return 0; |
| 94 |
| 95 unsigned int length = MIN (buffer_length, (unsigned int) match->length); |
| 96 memcpy (buffer, (char *) this + stringOffset + match->offset, length); |
| 97 return length; |
| 98 } |
| 99 |
| 100 inline bool sanitize_records (hb_sanitize_context_t *c) { |
| 101 TRACE_SANITIZE (); |
| 102 char *string_pool = (char *) this + stringOffset; |
| 103 unsigned int _count = count; |
| 104 for (unsigned int i = 0; i < _count; i++) |
| 105 if (!nameRecord[i].sanitize (c, string_pool)) return false; |
| 106 return true; |
| 107 } |
| 108 |
| 109 inline bool sanitize (hb_sanitize_context_t *c) { |
| 110 TRACE_SANITIZE (); |
| 111 return c->check_struct (this) && |
| 112 likely (format == 0 || format == 1) && |
| 113 c->check_array (nameRecord, nameRecord[0].static_size, count) && |
| 114 sanitize_records (c); |
| 115 } |
| 116 |
| 117 /* We only implement format 0 for now. */ |
| 118 private: |
| 119 USHORT format; /* Format selector (=0/1). */ |
| 120 USHORT count; /* Number of name records. */ |
| 121 Offset stringOffset; /* Offset to start of string storage (fr
om start of table). */ |
| 122 NameRecord nameRecord[VAR]; /* The name records where count is the n
umber of records. */ |
| 123 public: |
| 124 DEFINE_SIZE_ARRAY (6, nameRecord); |
| 125 }; |
| 126 |
| 127 |
| 128 |
| 129 #endif /* HB_OT_NAME_TABLE_HH */ |
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