?? otvcommn.c
字號:
LangSysCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (LangSysCount = %d)\n", LangSysCount ));
if ( DefaultLangSys != 0 )
otv_LangSys_validate( table + DefaultLangSys, valid );
OTV_LIMIT_CHECK( LangSysCount * 6 );
/* LangSysRecord */
for ( ; LangSysCount > 0; LangSysCount-- )
{
p += 4; /* skip LangSysTag */
/* LangSys */
otv_LangSys_validate( table + FT_NEXT_USHORT( p ), valid );
}
OTV_EXIT;
}
/* sets valid->extra1 (number of features) */
FT_LOCAL_DEF( void )
otv_ScriptList_validate( FT_Bytes table,
FT_Bytes features,
OTV_Validator valid )
{
FT_UInt ScriptCount;
FT_Bytes p = table;
OTV_NAME_ENTER( "ScriptList" );
OTV_LIMIT_CHECK( 2 );
ScriptCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (ScriptCount = %d)\n", ScriptCount ));
OTV_LIMIT_CHECK( ScriptCount * 6 );
valid->extra1 = otv_Feature_get_count( features );
/* ScriptRecord */
for ( ; ScriptCount > 0; ScriptCount-- )
{
p += 4; /* skip ScriptTag */
otv_Script_validate( table + FT_NEXT_USHORT( p ), valid ); /* Script */
}
OTV_EXIT;
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** UTILITY FUNCTIONS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/*
u: uint16
ux: unit16 [x]
s: struct
sx: struct [x]
sxy: struct [x], using external y count
x: uint16 x
C: Coverage
O: Offset
On: Offset (NULL)
Ox: Offset [x]
Onx: Offset (NULL) [x]
*/
FT_LOCAL_DEF( void )
otv_x_Ox( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Count;
OTV_Validate_Func func;
OTV_ENTER;
OTV_LIMIT_CHECK( 2 );
Count = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count = %d)\n", Count ));
OTV_LIMIT_CHECK( Count * 2 );
valid->nesting_level++;
func = valid->func[valid->nesting_level];
for ( ; Count > 0; Count-- )
func( table + FT_NEXT_USHORT( p ), valid );
valid->nesting_level--;
OTV_EXIT;
}
FT_LOCAL_DEF( void )
otv_u_C_x_Ox( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Count, Coverage;
OTV_Validate_Func func;
OTV_ENTER;
p += 2; /* skip Format */
OTV_LIMIT_CHECK( 4 );
Coverage = FT_NEXT_USHORT( p );
Count = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count = %d)\n", Count ));
otv_Coverage_validate( table + Coverage, valid );
OTV_LIMIT_CHECK( Count * 2 );
valid->nesting_level++;
func = valid->func[valid->nesting_level];
for ( ; Count > 0; Count-- )
func( table + FT_NEXT_USHORT( p ), valid );
valid->nesting_level--;
OTV_EXIT;
}
/* uses valid->extra1 (if > 0: array value limit) */
FT_LOCAL_DEF( void )
otv_x_ux( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Count;
OTV_ENTER;
OTV_LIMIT_CHECK( 2 );
Count = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count = %d)\n", Count ));
OTV_LIMIT_CHECK( Count * 2 );
if ( valid->extra1 )
{
for ( ; Count > 0; Count-- )
if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
FT_INVALID_DATA;
}
OTV_EXIT;
}
/* `ux' in the function's name is not really correct since only x-1 */
/* elements are tested */
/* uses valid->extra1 (array value limit) */
FT_LOCAL_DEF( void )
otv_x_y_ux_sy( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Count1, Count2;
OTV_ENTER;
OTV_LIMIT_CHECK( 4 );
Count1 = FT_NEXT_USHORT( p );
Count2 = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count1 = %d)\n", Count1 ));
OTV_TRACE(( " (Count2 = %d)\n", Count2 ));
if ( Count1 == 0 )
FT_INVALID_DATA;
OTV_LIMIT_CHECK( ( Count1 - 1 ) * 2 + Count2 * 4 );
for ( ; Count2 > 0; Count2-- )
{
if ( FT_NEXT_USHORT( p ) >= Count1 )
FT_INVALID_DATA;
if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
FT_INVALID_DATA;
}
OTV_EXIT;
}
/* `uy' in the function's name is not really correct since only y-1 */
/* elements are tested */
/* uses valid->extra1 (array value limit) */
FT_LOCAL_DEF( void )
otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt BacktrackCount, InputCount, LookaheadCount;
FT_UInt Count;
OTV_ENTER;
OTV_LIMIT_CHECK( 2 );
BacktrackCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (BacktrackCount = %d)\n", BacktrackCount ));
OTV_LIMIT_CHECK( BacktrackCount * 2 + 2 );
p += BacktrackCount * 2;
InputCount = FT_NEXT_USHORT( p );
if ( InputCount == 0 )
FT_INVALID_DATA;
OTV_TRACE(( " (InputCount = %d)\n", InputCount ));
OTV_LIMIT_CHECK( InputCount * 2 );
p += ( InputCount - 1 ) * 2;
LookaheadCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (LookaheadCount = %d)\n", LookaheadCount ));
OTV_LIMIT_CHECK( LookaheadCount * 2 + 2 );
p += LookaheadCount * 2;
Count = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count = %d)\n", Count ));
OTV_LIMIT_CHECK( Count * 4 );
for ( ; Count > 0; Count-- )
{
if ( FT_NEXT_USHORT( p ) >= InputCount )
FT_INVALID_DATA;
if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
FT_INVALID_DATA;
}
OTV_EXIT;
}
/* sets valid->extra1 (valid->lookup_count) */
FT_LOCAL_DEF( void )
otv_u_O_O_x_Onx( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Coverage, ClassDef, ClassSetCount;
OTV_Validate_Func func;
OTV_ENTER;
p += 2; /* skip Format */
OTV_LIMIT_CHECK( 6 );
Coverage = FT_NEXT_USHORT( p );
ClassDef = FT_NEXT_USHORT( p );
ClassSetCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (ClassSetCount = %d)\n", ClassSetCount ));
otv_Coverage_validate( table + Coverage, valid );
otv_ClassDef_validate( table + ClassDef, valid );
OTV_LIMIT_CHECK( ClassSetCount * 2 );
valid->nesting_level++;
func = valid->func[valid->nesting_level];
valid->extra1 = valid->lookup_count;
for ( ; ClassSetCount > 0; ClassSetCount-- )
{
FT_UInt offset = FT_NEXT_USHORT( p );
if ( offset )
func( table + offset, valid );
}
valid->nesting_level--;
OTV_EXIT;
}
/* uses valid->lookup_count */
FT_LOCAL_DEF( void )
otv_u_x_y_Ox_sy( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt GlyphCount, Count, count1;
OTV_ENTER;
p += 2; /* skip Format */
OTV_LIMIT_CHECK( 4 );
GlyphCount = FT_NEXT_USHORT( p );
Count = FT_NEXT_USHORT( p );
OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
OTV_TRACE(( " (Count = %d)\n", Count ));
OTV_LIMIT_CHECK( GlyphCount * 2 + Count * 4 );
for ( count1 = GlyphCount; count1 > 0; count1-- )
otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid );
for ( ; Count > 0; Count-- )
{
if ( FT_NEXT_USHORT( p ) >= GlyphCount )
FT_INVALID_DATA;
if ( FT_NEXT_USHORT( p ) >= valid->lookup_count )
FT_INVALID_DATA;
}
OTV_EXIT;
}
/* sets valid->extra1 (valid->lookup_count) */
FT_LOCAL_DEF( void )
otv_u_O_O_O_O_x_Onx( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt Coverage;
FT_UInt BacktrackClassDef, InputClassDef, LookaheadClassDef;
FT_UInt ChainClassSetCount;
OTV_Validate_Func func;
OTV_ENTER;
p += 2; /* skip Format */
OTV_LIMIT_CHECK( 10 );
Coverage = FT_NEXT_USHORT( p );
BacktrackClassDef = FT_NEXT_USHORT( p );
InputClassDef = FT_NEXT_USHORT( p );
LookaheadClassDef = FT_NEXT_USHORT( p );
ChainClassSetCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (ChainClassSetCount = %d)\n", ChainClassSetCount ));
otv_Coverage_validate( table + Coverage, valid );
otv_ClassDef_validate( table + BacktrackClassDef, valid );
otv_ClassDef_validate( table + InputClassDef, valid );
otv_ClassDef_validate( table + LookaheadClassDef, valid );
OTV_LIMIT_CHECK( ChainClassSetCount * 2 );
valid->nesting_level++;
func = valid->func[valid->nesting_level];
valid->extra1 = valid->lookup_count;
for ( ; ChainClassSetCount > 0; ChainClassSetCount-- )
{
FT_UInt offset = FT_NEXT_USHORT( p );
if ( offset )
func( table + offset, valid );
}
valid->nesting_level--;
OTV_EXIT;
}
/* uses valid->lookup_count */
FT_LOCAL_DEF( void )
otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt BacktrackGlyphCount, InputGlyphCount, LookaheadGlyphCount;
FT_UInt count1, count2;
OTV_ENTER;
p += 2; /* skip Format */
OTV_LIMIT_CHECK( 2 );
BacktrackGlyphCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (BacktrackGlyphCount = %d)\n", BacktrackGlyphCount ));
OTV_LIMIT_CHECK( BacktrackGlyphCount * 2 + 2 );
for ( ; BacktrackGlyphCount > 0; BacktrackGlyphCount-- )
otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid );
InputGlyphCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (InputGlyphCount = %d)\n", InputGlyphCount ));
OTV_LIMIT_CHECK( InputGlyphCount * 2 + 2 );
for ( count1 = InputGlyphCount; count1 > 0; count1-- )
otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid );
LookaheadGlyphCount = FT_NEXT_USHORT( p );
OTV_TRACE(( " (LookaheadGlyphCount = %d)\n", LookaheadGlyphCount ));
OTV_LIMIT_CHECK( LookaheadGlyphCount * 2 + 2 );
for ( ; LookaheadGlyphCount > 0; LookaheadGlyphCount-- )
otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid );
count2 = FT_NEXT_USHORT( p );
OTV_TRACE(( " (Count = %d)\n", count2 ));
OTV_LIMIT_CHECK( count2 * 4 );
for ( ; count2 > 0; count2-- )
{
if ( FT_NEXT_USHORT( p ) >= InputGlyphCount )
FT_INVALID_DATA;
if ( FT_NEXT_USHORT( p ) >= valid->lookup_count )
FT_INVALID_DATA;
}
OTV_EXIT;
}
FT_LOCAL_DEF( FT_UInt )
otv_GSUBGPOS_get_Lookup_count( FT_Bytes table )
{
FT_Bytes p = table + 8;
return otv_LookupList_get_count( table + FT_NEXT_USHORT( p ) );
}
FT_LOCAL_DEF( FT_UInt )
otv_GSUBGPOS_have_MarkAttachmentType_flag( FT_Bytes table )
{
FT_Bytes p, lookup;
FT_UInt count;
if ( !table )
return 0;
/* LookupList */
p = table + 8;
table += FT_NEXT_USHORT( p );
/* LookupCount */
p = table;
count = FT_NEXT_USHORT( p );
for ( ; count > 0; count-- )
{
FT_Bytes oldp;
/* Lookup */
lookup = table + FT_NEXT_USHORT( p );
oldp = p;
/* LookupFlag */
p = lookup + 2;
if ( FT_NEXT_USHORT( p ) & 0xFF00U )
return 1;
p = oldp;
}
return 0;
}
/* END */
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -