ref: c8b187f9db503465460d8bafa2d7a758bbcf59ca
dir: /libfreetype/otlgdef.c/
#include "otlgdef.h" #include "otlcommn.h" /************************************************************************/ /************************************************************************/ /***** *****/ /***** ATTACHMENTS LIST *****/ /***** *****/ /************************************************************************/ /************************************************************************/ static void otl_attach_point_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; OTL_UInt count; if ( p + 2 > valid->limit ) OTL_INVALID_TOO_SHORT; count = OTL_NEXT_USHORT( p ); if ( table + count*2 > valid->limit ) OTL_INVALID_TOO_SHORT; } static void otl_attach_list_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; OTL_Bytes coverage; OTL_UInt count; if ( p + 4 > valid->limit ) OTL_INVALID_TOO_SHORT; coverage = table + OTL_NEXT_USHORT( p ); count = OTL_NEXT_USHORT( p ); otl_coverage_validate( coverage, valid ); if ( count != otl_coverage_get_count( coverage ) ) OTL_INVALID_DATA; if ( p + count*2 > valid->limit ) OTL_INVALID_TOO_SHORT; for ( ; count > 0; count-- ) otl_attach_point_validate( table + OTL_NEXT_USHORT( p ) ); } /************************************************************************/ /************************************************************************/ /***** *****/ /***** LIGATURE CARETS *****/ /***** *****/ /************************************************************************/ /************************************************************************/ static void otl_caret_value_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; if ( p + 4 > valid->limit ) OTL_INVALID_TOO_SHORT; format = OTL_NEXT_USHORT( p ); switch ( format ) { case 1: case 2: break; case 3: { OTL_Bytes device; p += 2; if ( p + 2 > valid->limit ) OTL_INVALID_TOO_SHORT; otl_device_table_validate( table + OTL_PEEK_USHORT( p ) ); } break; default: OTL_INVALID_DATA; } } static void otl_ligature_glyph_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; OTL_UInt count; if ( p + 2 > valid->limit ) OTL_INVALID_TOO_SHORT; count = OTL_NEXT_USHORT( p ); if ( p + count*2 > valid->limit ) OTL_INVALID_TOO_SHORT; for ( ; count > 0; count-- ) otl_caret_value_validate( table + OTL_NEXT_USHORT( p ) ); } static void otl_ligature_caret_list_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; OTL_Bytes coverage; OTL_UInt count; if ( p + 4 > valid->limit ) OTL_INVALID_TOO_SHORT; coverage = table + OTL_NEXT_USHORT( p ); count = OTL_NEXT_USHORT( p ); otl_coverage_validate( coverage, valid ); if ( count != otl_coverage_get_count( coverage ) ) OTL_INVALID_DATA; if ( p + count*2 > valid->limit ) OTL_INVALID_TOO_SHORT; for ( ; count > 0; count-- ) otl_ligature_glyph_validate( table + OTL_NEXT_USHORT( p ) ); } /************************************************************************/ /************************************************************************/ /***** *****/ /***** GDEF TABLE *****/ /***** *****/ /************************************************************************/ /************************************************************************/ OTL_APIDEF( void ) otl_gdef_validate( OTL_Bytes table, OTL_Validator valid ) { OTL_Bytes p = table; if ( p + 12 > valid->limit ) OTL_INVALID_TOO_SHORT; /* check format */ if ( OTL_NEXT_ULONG( p ) != 0x00010000UL ) OTL_INVALID_FORMAT; /* validate class definition table */ otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) ); /* validate attachment point list */ otl_attach_list_validate( table + OTL_NEXT_USHORT( p ) ); /* validate ligature caret list */ otl_ligature_caret_list_validate( table + OTL_NEXT_USHORT( p ) ); /* validate mark attach class */ otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) ); }