1 /****************************************************************************
5 * OpenType BASE table validation (body).
7 * Copyright (C) 2004-2020 by
8 * David Turner, Robert Wilhelm, and Werner Lemberg.
10 * This file is part of the FreeType project, and may only be used,
11 * modified, and distributed under the terms of the FreeType project
12 * license, LICENSE.TXT. By continuing to use, modify, or distribute
13 * this file you indicate that you have read the license and
14 * understand and accept it fully.
23 /**************************************************************************
25 * The macro FT_COMPONENT is used in trace mode. It is an implicit
26 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
27 * messages during execution.
30 #define FT_COMPONENT otvbase
34 otv_BaseCoord_validate( FT_Bytes table,
35 OTV_Validator otvalid )
38 FT_UInt BaseCoordFormat;
41 OTV_NAME_ENTER( "BaseCoord" );
44 BaseCoordFormat = FT_NEXT_USHORT( p );
45 p += 2; /* skip Coordinate */
47 OTV_TRACE(( " (format %d)\n", BaseCoordFormat ));
49 switch ( BaseCoordFormat )
51 case 1: /* BaseCoordFormat1 */
54 case 2: /* BaseCoordFormat2 */
55 OTV_LIMIT_CHECK( 4 ); /* ReferenceGlyph, BaseCoordPoint */
58 case 3: /* BaseCoordFormat3 */
61 otv_Device_validate( table + FT_NEXT_USHORT( p ), otvalid );
73 otv_BaseTagList_validate( FT_Bytes table,
74 OTV_Validator otvalid )
80 OTV_NAME_ENTER( "BaseTagList" );
84 BaseTagCount = FT_NEXT_USHORT( p );
86 OTV_TRACE(( " (BaseTagCount = %d)\n", BaseTagCount ));
88 OTV_LIMIT_CHECK( BaseTagCount * 4 ); /* BaselineTag */
95 otv_BaseValues_validate( FT_Bytes table,
96 OTV_Validator otvalid )
99 FT_UInt BaseCoordCount;
102 OTV_NAME_ENTER( "BaseValues" );
104 OTV_LIMIT_CHECK( 4 );
106 p += 2; /* skip DefaultIndex */
107 BaseCoordCount = FT_NEXT_USHORT( p );
109 OTV_TRACE(( " (BaseCoordCount = %d)\n", BaseCoordCount ));
111 OTV_LIMIT_CHECK( BaseCoordCount * 2 );
114 for ( ; BaseCoordCount > 0; BaseCoordCount-- )
115 otv_BaseCoord_validate( table + FT_NEXT_USHORT( p ), otvalid );
122 otv_MinMax_validate( FT_Bytes table,
123 OTV_Validator otvalid )
127 FT_UInt FeatMinMaxCount;
129 OTV_OPTIONAL_TABLE( MinCoord );
130 OTV_OPTIONAL_TABLE( MaxCoord );
133 OTV_NAME_ENTER( "MinMax" );
135 OTV_LIMIT_CHECK( 6 );
137 OTV_OPTIONAL_OFFSET( MinCoord );
138 OTV_OPTIONAL_OFFSET( MaxCoord );
139 FeatMinMaxCount = FT_NEXT_USHORT( p );
141 OTV_TRACE(( " (FeatMinMaxCount = %d)\n", FeatMinMaxCount ));
143 table_size = FeatMinMaxCount * 8 + 6;
145 OTV_SIZE_CHECK( MinCoord );
147 otv_BaseCoord_validate( table + MinCoord, otvalid );
149 OTV_SIZE_CHECK( MaxCoord );
151 otv_BaseCoord_validate( table + MaxCoord, otvalid );
153 OTV_LIMIT_CHECK( FeatMinMaxCount * 8 );
155 /* FeatMinMaxRecord */
156 for ( ; FeatMinMaxCount > 0; FeatMinMaxCount-- )
158 p += 4; /* skip FeatureTableTag */
160 OTV_OPTIONAL_OFFSET( MinCoord );
161 OTV_OPTIONAL_OFFSET( MaxCoord );
163 OTV_SIZE_CHECK( MinCoord );
165 otv_BaseCoord_validate( table + MinCoord, otvalid );
167 OTV_SIZE_CHECK( MaxCoord );
169 otv_BaseCoord_validate( table + MaxCoord, otvalid );
177 otv_BaseScript_validate( FT_Bytes table,
178 OTV_Validator otvalid )
182 FT_UInt BaseLangSysCount;
184 OTV_OPTIONAL_TABLE( BaseValues );
185 OTV_OPTIONAL_TABLE( DefaultMinMax );
188 OTV_NAME_ENTER( "BaseScript" );
190 OTV_LIMIT_CHECK( 6 );
191 OTV_OPTIONAL_OFFSET( BaseValues );
192 OTV_OPTIONAL_OFFSET( DefaultMinMax );
193 BaseLangSysCount = FT_NEXT_USHORT( p );
195 OTV_TRACE(( " (BaseLangSysCount = %d)\n", BaseLangSysCount ));
197 table_size = BaseLangSysCount * 6 + 6;
199 OTV_SIZE_CHECK( BaseValues );
201 otv_BaseValues_validate( table + BaseValues, otvalid );
203 OTV_SIZE_CHECK( DefaultMinMax );
205 otv_MinMax_validate( table + DefaultMinMax, otvalid );
207 OTV_LIMIT_CHECK( BaseLangSysCount * 6 );
209 /* BaseLangSysRecord */
210 for ( ; BaseLangSysCount > 0; BaseLangSysCount-- )
212 p += 4; /* skip BaseLangSysTag */
214 otv_MinMax_validate( table + FT_NEXT_USHORT( p ), otvalid );
222 otv_BaseScriptList_validate( FT_Bytes table,
223 OTV_Validator otvalid )
226 FT_UInt BaseScriptCount;
229 OTV_NAME_ENTER( "BaseScriptList" );
231 OTV_LIMIT_CHECK( 2 );
232 BaseScriptCount = FT_NEXT_USHORT( p );
234 OTV_TRACE(( " (BaseScriptCount = %d)\n", BaseScriptCount ));
236 OTV_LIMIT_CHECK( BaseScriptCount * 6 );
238 /* BaseScriptRecord */
239 for ( ; BaseScriptCount > 0; BaseScriptCount-- )
241 p += 4; /* skip BaseScriptTag */
244 otv_BaseScript_validate( table + FT_NEXT_USHORT( p ), otvalid );
252 otv_Axis_validate( FT_Bytes table,
253 OTV_Validator otvalid )
258 OTV_OPTIONAL_TABLE( BaseTagList );
261 OTV_NAME_ENTER( "Axis" );
263 OTV_LIMIT_CHECK( 4 );
264 OTV_OPTIONAL_OFFSET( BaseTagList );
268 OTV_SIZE_CHECK( BaseTagList );
270 otv_BaseTagList_validate( table + BaseTagList, otvalid );
273 otv_BaseScriptList_validate( table + FT_NEXT_USHORT( p ), otvalid );
280 otv_BASE_validate( FT_Bytes table,
281 FT_Validator ftvalid )
283 OTV_ValidatorRec otvalidrec;
284 OTV_Validator otvalid = &otvalidrec;
289 OTV_OPTIONAL_TABLE( HorizAxis );
290 OTV_OPTIONAL_TABLE( VertAxis );
292 OTV_OPTIONAL_TABLE32( itemVarStore );
295 otvalid->root = ftvalid;
297 FT_TRACE3(( "validating BASE table\n" ));
300 OTV_LIMIT_CHECK( 4 );
302 if ( FT_NEXT_USHORT( p ) != 1 ) /* majorVersion */
305 version = FT_NEXT_USHORT( p ); /* minorVersion */
311 OTV_LIMIT_CHECK( 4 );
315 OTV_LIMIT_CHECK( 8 );
323 OTV_OPTIONAL_OFFSET( HorizAxis );
324 OTV_SIZE_CHECK( HorizAxis );
326 otv_Axis_validate( table + HorizAxis, otvalid );
328 OTV_OPTIONAL_OFFSET( VertAxis );
329 OTV_SIZE_CHECK( VertAxis );
331 otv_Axis_validate( table + VertAxis, otvalid );
335 OTV_OPTIONAL_OFFSET32( itemVarStore );
336 OTV_SIZE_CHECK32( itemVarStore );
338 OTV_TRACE(( " [omitting itemVarStore validation]\n" )); /* XXX */