ReactOS 0.4.15-dev-7660-g0086d05
gxvfeat.c
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1/***************************************************************************/
2/* */
3/* gxvfeat.c */
4/* */
5/* TrueTypeGX/AAT feat table validation (body). */
6/* */
7/* Copyright 2004-2018 by */
8/* suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
9/* David Turner, Robert Wilhelm, and Werner Lemberg. */
10/* */
11/* This file is part of the FreeType project, and may only be used, */
12/* modified, and distributed under the terms of the FreeType project */
13/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14/* this file you indicate that you have read the license and */
15/* understand and accept it fully. */
16/* */
17/***************************************************************************/
18
19/***************************************************************************/
20/* */
21/* gxvalid is derived from both gxlayout module and otvalid module. */
22/* Development of gxlayout is supported by the Information-technology */
23/* Promotion Agency(IPA), Japan. */
24/* */
25/***************************************************************************/
26
27
28#include "gxvalid.h"
29#include "gxvcommn.h"
30#include "gxvfeat.h"
31
32
33 /*************************************************************************/
34 /* */
35 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
36 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
37 /* messages during execution. */
38 /* */
39#undef FT_COMPONENT
40#define FT_COMPONENT trace_gxvfeat
41
42
43 /*************************************************************************/
44 /*************************************************************************/
45 /***** *****/
46 /***** Data and Types *****/
47 /***** *****/
48 /*************************************************************************/
49 /*************************************************************************/
50
51 typedef struct GXV_feat_DataRec_
52 {
56
58
59
60#define GXV_FEAT_DATA( field ) GXV_TABLE_DATA( feat, field )
61
62
64 {
69
71
72
73 /*************************************************************************/
74 /*************************************************************************/
75 /***** *****/
76 /***** UTILITY FUNCTIONS *****/
77 /***** *****/
78 /*************************************************************************/
79 /*************************************************************************/
80
81 static void
83 FT_UShort nSettings,
84 FT_Bool exclusive,
85 GXV_Validator gxvalid )
86 {
87 GXV_NAME_ENTER( "feature in registry" );
88
89 GXV_TRACE(( " (feature = %u)\n", feature ));
90
92 {
93 GXV_TRACE(( "feature number %d is out of range %d\n",
96 goto Exit;
97 }
98
99 if ( gxv_feat_registry[feature].existence == 0 )
100 {
101 GXV_TRACE(( "feature number %d is in defined range but doesn't exist\n",
102 feature ));
104 goto Exit;
105 }
106
107 if ( gxv_feat_registry[feature].apple_reserved )
108 {
109 /* Don't use here. Apple is reserved. */
110 GXV_TRACE(( "feature number %d is reserved by Apple\n", feature ));
111 if ( gxvalid->root->level >= FT_VALIDATE_TIGHT )
113 }
114
115 if ( nSettings != gxv_feat_registry[feature].nSettings )
116 {
117 GXV_TRACE(( "feature %d: nSettings %d != defined nSettings %d\n",
118 feature, nSettings,
119 gxv_feat_registry[feature].nSettings ));
120 if ( gxvalid->root->level >= FT_VALIDATE_TIGHT )
122 }
123
124 if ( exclusive != gxv_feat_registry[feature].exclusive )
125 {
126 GXV_TRACE(( "exclusive flag %d differs from predefined value\n",
127 exclusive ));
128 if ( gxvalid->root->level >= FT_VALIDATE_TIGHT )
130 }
131
132 Exit:
133 GXV_EXIT;
134 }
135
136
137 static void
140 GXV_Validator gxvalid )
141 {
142 FT_Bytes p = table;
143
144 FT_Short nameIndex;
145
146
147 GXV_NAME_ENTER( "nameIndex" );
148
149 GXV_LIMIT_CHECK( 2 );
150 nameIndex = FT_NEXT_SHORT ( p );
151 GXV_TRACE(( " (nameIndex = %d)\n", nameIndex ));
152
154 255,
155 32768U,
156 gxvalid );
157
158 GXV_EXIT;
159 }
160
161
162 static void
165 FT_Bool exclusive,
166 GXV_Validator gxvalid )
167 {
168 FT_Bytes p = table;
170
171
172 GXV_NAME_ENTER( "setting" );
173
174 GXV_LIMIT_CHECK( 2 );
175
177
178 /* If we have exclusive setting, the setting should be odd. */
179 if ( exclusive && ( setting & 1 ) == 0 )
181
183
185
186 GXV_EXIT;
187 }
188
189
190 static void
193 GXV_Validator gxvalid )
194 {
195 FT_Bytes p = table;
196 FT_UInt reserved_size = GXV_FEAT_DATA( reserved_size );
197
199 FT_UShort nSettings;
200 FT_ULong settingTable;
201 FT_UShort featureFlags;
202
203 FT_Bool exclusive;
204 FT_Int last_setting;
205 FT_UInt i;
206
207
208 GXV_NAME_ENTER( "name" );
209
210 /* feature + nSettings + settingTable + featureFlags */
211 GXV_LIMIT_CHECK( 2 + 2 + 4 + 2 );
212
215
216 nSettings = FT_NEXT_USHORT( p );
217 settingTable = FT_NEXT_ULONG ( p );
218 featureFlags = FT_NEXT_USHORT( p );
219
220 if ( settingTable < reserved_size )
222
223 if ( ( featureFlags & GXV_FEAT_MASK_UNUSED ) == 0 )
225
226 exclusive = FT_BOOL( featureFlags & GXV_FEAT_MASK_EXCLUSIVE_SETTINGS );
227 if ( exclusive )
228 {
229 FT_Byte dynamic_default;
230
231
232 if ( featureFlags & GXV_FEAT_MASK_DYNAMIC_DEFAULT )
233 dynamic_default = (FT_Byte)( featureFlags &
235 else
236 dynamic_default = 0;
237
238 /* If exclusive, check whether default setting is in the range. */
239 if ( !( dynamic_default < nSettings ) )
241 }
242
243 gxv_feat_registry_validate( feature, nSettings, exclusive, gxvalid );
244
246
247 p = gxvalid->root->base + settingTable;
248 for ( last_setting = -1, i = 0; i < nSettings; i++ )
249 {
250 gxv_feat_setting_validate( p, limit, exclusive, gxvalid );
251
252 if ( (FT_Int)GXV_FEAT_DATA( setting ) <= last_setting )
254
255 last_setting = (FT_Int)GXV_FEAT_DATA( setting );
256 /* setting + nameIndex */
257 p += ( 2 + 2 );
258 }
259
260 GXV_EXIT;
261 }
262
263
264 /*************************************************************************/
265 /*************************************************************************/
266 /***** *****/
267 /***** feat TABLE *****/
268 /***** *****/
269 /*************************************************************************/
270 /*************************************************************************/
271
272 FT_LOCAL_DEF( void )
275 FT_Validator ftvalid )
276 {
277 GXV_ValidatorRec gxvalidrec;
278 GXV_Validator gxvalid = &gxvalidrec;
279
280 GXV_feat_DataRec featrec;
281 GXV_feat_Data feat = &featrec;
282
283 FT_Bytes p = table;
284 FT_Bytes limit = 0;
285
286 FT_UInt featureNameCount;
287
288 FT_UInt i;
289 FT_Int last_feature;
290
291
292 gxvalid->root = ftvalid;
293 gxvalid->table_data = feat;
294 gxvalid->face = face;
295
296 FT_TRACE3(( "validating `feat' table\n" ));
297 GXV_INIT;
298
299 feat->reserved_size = 0;
300
301 /* version + featureNameCount + none_0 + none_1 */
302 GXV_LIMIT_CHECK( 4 + 2 + 2 + 4 );
303 feat->reserved_size += 4 + 2 + 2 + 4;
304
305 if ( FT_NEXT_ULONG( p ) != 0x00010000UL ) /* Version */
307
308 featureNameCount = FT_NEXT_USHORT( p );
309 GXV_TRACE(( " (featureNameCount = %d)\n", featureNameCount ));
310
311 if ( !( IS_PARANOID_VALIDATION ) )
312 p += 6; /* skip (none) and (none) */
313 else
314 {
315 if ( FT_NEXT_USHORT( p ) != 0 )
317
318 if ( FT_NEXT_ULONG( p ) != 0 )
320 }
321
322 feat->reserved_size += featureNameCount * ( 2 + 2 + 4 + 2 + 2 );
323
324 for ( last_feature = -1, i = 0; i < featureNameCount; i++ )
325 {
326 gxv_feat_name_validate( p, limit, gxvalid );
327
328 if ( (FT_Int)GXV_FEAT_DATA( feature ) <= last_feature )
330
331 last_feature = GXV_FEAT_DATA( feature );
332 p += 2 + 2 + 4 + 2 + 2;
333 }
334
335 FT_TRACE4(( "\n" ));
336 }
337
338
339/* END */
WORD face[3]
Definition: mesh.c:4747
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
#define FT_TRACE3(varformat)
Definition: ftdebug.h:160
#define FT_TRACE4(varformat)
Definition: ftdebug.h:161
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
#define FT_NEXT_SHORT(buffer)
Definition: ftstream.h:223
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
unsigned long FT_ULong
Definition: fttypes.h:253
unsigned char FT_Byte
Definition: fttypes.h:154
unsigned short FT_UShort
Definition: fttypes.h:209
signed short FT_Short
Definition: fttypes.h:198
unsigned int FT_UInt
Definition: fttypes.h:231
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
#define FT_BOOL(x)
Definition: fttypes.h:578
signed int FT_Int
Definition: fttypes.h:220
#define FT_INVALID_FORMAT
Definition: ftvalid.h:142
@ FT_VALIDATE_TIGHT
Definition: ftvalid.h:73
#define FT_INVALID_OFFSET
Definition: ftvalid.h:138
#define FT_INVALID_DATA
Definition: ftvalid.h:150
typedefFT_BEGIN_HEADER struct FT_ValidatorRec_ volatile * FT_Validator
Definition: ftvalid.h:42
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
GLint limit
Definition: glext.h:10326
GLfloat GLfloat p
Definition: glext.h:8902
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
gxv_sfntName_validate(FT_UShort name_index, FT_UShort min_index, FT_UShort max_index, GXV_Validator gxvalid)
Definition: gxvcommn.c:884
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
#define GXV_SET_ERR_IF_PARANOID(err)
Definition: gxvcommn.h:66
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
#define GXV_INIT
Definition: gxvcommn.h:300
#define IS_PARANOID_VALIDATION
Definition: gxvcommn.h:65
#define GXV_EXIT
Definition: gxvcommn.h:302
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
static void gxv_feat_name_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvfeat.c:191
static void gxv_feat_setting_validate(FT_Bytes table, FT_Bytes limit, FT_Bool exclusive, GXV_Validator gxvalid)
Definition: gxvfeat.c:163
enum GXV_FeatureFlagsMask_ GXV_FeatureFlagsMask
static void gxv_feat_registry_validate(FT_UShort feature, FT_UShort nSettings, FT_Bool exclusive, GXV_Validator gxvalid)
Definition: gxvfeat.c:82
struct GXV_feat_DataRec_ * GXV_feat_Data
GXV_FeatureFlagsMask_
Definition: gxvfeat.c:64
@ GXV_FEAT_MASK_DEFAULT_SETTING
Definition: gxvfeat.c:68
@ GXV_FEAT_MASK_UNUSED
Definition: gxvfeat.c:67
@ GXV_FEAT_MASK_EXCLUSIVE_SETTINGS
Definition: gxvfeat.c:65
@ GXV_FEAT_MASK_DYNAMIC_DEFAULT
Definition: gxvfeat.c:66
struct GXV_feat_DataRec_ GXV_feat_DataRec
gxv_feat_validate(FT_Bytes table, FT_Face face, FT_Validator ftvalid)
Definition: gxvfeat.c:273
static void gxv_feat_name_index_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvfeat.c:138
#define GXV_FEAT_DATA(field)
Definition: gxvfeat.c:60
static GX_Feature_RegistryRec gxv_feat_registry[]
Definition: gxvfeat.h:60
#define gxv_feat_registry_length
Definition: gxvfeat.h:55
INTERNETFEATURELIST feature
Definition: misc.c:1719
static void Exit(void)
Definition: sock.c:1330
FT_Validator root
Definition: gxvcommn.h:239
void * table_data
Definition: gxvcommn.h:242
FT_UInt reserved_size
Definition: gxvfeat.c:53
FT_UShort feature
Definition: gxvfeat.c:54
FT_UShort setting
Definition: gxvfeat.c:55