1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/***************************************************************************/
/* */
/* gxvmort5.c */
/* */
/* TrueTypeGX/AAT mort table validation */
/* body for type5 (Contextual Glyph Insertion) subtable. */
/* */
/* Copyright 2005-2015 by */
/* suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
/***************************************************************************/
/* */
/* gxvalid is derived from both gxlayout module and otvalid module. */
/* Development of gxlayout is supported by the Information-technology */
/* Promotion Agency(IPA), Japan. */
/* */
/***************************************************************************/
#include "gxvmort.h"
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_gxvmort
/*
* mort subtable type5 (Contextual Glyph Insertion)
* has the format of StateTable with insertion-glyph-list,
* but without name. The offset is given by glyphOffset in
* entryTable. There is no table location declaration
* like xxxTable.
*/
typedef struct GXV_mort_subtable_type5_StateOptRec_
{
FT_UShort classTable;
FT_UShort stateArray;
FT_UShort entryTable;
#define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE GXV_STATETABLE_HEADER_SIZE
FT_UShort* classTable_length_p;
FT_UShort* stateArray_length_p;
FT_UShort* entryTable_length_p;
} GXV_mort_subtable_type5_StateOptRec,
*GXV_mort_subtable_type5_StateOptRecData;
FT_LOCAL_DEF( void )
gxv_mort_subtable_type5_subtable_setup( FT_UShort table_size,
FT_UShort classTable,
FT_UShort stateArray,
FT_UShort entryTable,
FT_UShort* classTable_length_p,
FT_UShort* stateArray_length_p,
FT_UShort* entryTable_length_p,
GXV_Validator gxvalid )
{
GXV_mort_subtable_type5_StateOptRecData optdata =
(GXV_mort_subtable_type5_StateOptRecData)gxvalid->statetable.optdata;
gxv_StateTable_subtable_setup( table_size,
classTable,
stateArray,
entryTable,
classTable_length_p,
stateArray_length_p,
entryTable_length_p,
gxvalid );
optdata->classTable = classTable;
optdata->stateArray = stateArray;
optdata->entryTable = entryTable;
optdata->classTable_length_p = classTable_length_p;
optdata->stateArray_length_p = stateArray_length_p;
optdata->entryTable_length_p = entryTable_length_p;
}
static void
gxv_mort_subtable_type5_InsertList_validate( FT_UShort offset,
FT_UShort count,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
/*
* We don't know the range of insertion-glyph-list.
* Set range by whole of state table.
*/
FT_Bytes p = table + offset;
GXV_mort_subtable_type5_StateOptRecData optdata =
(GXV_mort_subtable_type5_StateOptRecData)gxvalid->statetable.optdata;
if ( optdata->classTable < offset &&
offset < optdata->classTable + *(optdata->classTable_length_p) )
GXV_TRACE(( " offset runs into ClassTable" ));
if ( optdata->stateArray < offset &&
offset < optdata->stateArray + *(optdata->stateArray_length_p) )
GXV_TRACE(( " offset runs into StateArray" ));
if ( optdata->entryTable < offset &&
offset < optdata->entryTable + *(optdata->entryTable_length_p) )
GXV_TRACE(( " offset runs into EntryTable" ));
#ifndef GXV_LOAD_TRACE_VARS
GXV_LIMIT_CHECK( count * 2 );
#else
while ( p < table + offset + ( count * 2 ) )
{
FT_UShort insert_glyphID;
GXV_LIMIT_CHECK( 2 );
insert_glyphID = FT_NEXT_USHORT( p );
GXV_TRACE(( " 0x%04x", insert_glyphID ));
}
GXV_TRACE(( "\n" ));
#endif
}
static void
gxv_mort_subtable_type5_entry_validate(
FT_Byte state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetCPtr glyphOffset,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
#ifdef GXV_LOAD_UNUSED_VARS
FT_Bool setMark;
FT_Bool dontAdvance;
FT_Bool currentIsKashidaLike;
FT_Bool markedIsKashidaLike;
FT_Bool currentInsertBefore;
FT_Bool markedInsertBefore;
#endif
FT_Byte currentInsertCount;
FT_Byte markedInsertCount;
FT_UShort currentInsertList;
FT_UShort markedInsertList;
FT_UNUSED( state );
#ifdef GXV_LOAD_UNUSED_VARS
setMark = FT_BOOL( ( flags >> 15 ) & 1 );
dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 );
currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 );
markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 );
currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 );
markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 );
#endif
currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F );
markedInsertCount = (FT_Byte)( flags & 0x001F );
currentInsertList = (FT_UShort)( glyphOffset->ul >> 16 );
markedInsertList = (FT_UShort)( glyphOffset->ul );
if ( 0 != currentInsertList && 0 != currentInsertCount )
{
gxv_mort_subtable_type5_InsertList_validate( currentInsertList,
currentInsertCount,
table,
limit,
gxvalid );
}
if ( 0 != markedInsertList && 0 != markedInsertCount )
{
gxv_mort_subtable_type5_InsertList_validate( markedInsertList,
markedInsertCount,
table,
limit,
gxvalid );
}
}
FT_LOCAL_DEF( void )
gxv_mort_subtable_type5_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_Bytes p = table;
GXV_mort_subtable_type5_StateOptRec et_rec;
GXV_mort_subtable_type5_StateOptRecData et = &et_rec;
GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" );
GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE );
gxvalid->statetable.optdata =
et;
gxvalid->statetable.optdata_load_func =
NULL;
gxvalid->statetable.subtable_setup_func =
gxv_mort_subtable_type5_subtable_setup;
gxvalid->statetable.entry_glyphoffset_fmt =
GXV_GLYPHOFFSET_ULONG;
gxvalid->statetable.entry_validate_func =
gxv_mort_subtable_type5_entry_validate;
gxv_StateTable_validate( p, limit, gxvalid );
GXV_EXIT;
}
/* END */
|
