1 /**************************************************************************** 2 * 3 * gxvmorx0.c 4 * 5 * TrueTypeGX/AAT morx table validation 6 * body for type0 (Indic Script Rearrangement) subtable. 7 * 8 * Copyright 2005-2018 by 9 * suzuki toshiya, Masatake YAMATO, Red Hat K.K., 10 * David Turner, Robert Wilhelm, and Werner Lemberg. 11 * 12 * This file is part of the FreeType project, and may only be used, 13 * modified, and distributed under the terms of the FreeType project 14 * license, LICENSE.TXT. By continuing to use, modify, or distribute 15 * this file you indicate that you have read the license and 16 * understand and accept it fully. 17 * 18 */ 19 20 /**************************************************************************** 21 * 22 * gxvalid is derived from both gxlayout module and otvalid module. 23 * Development of gxlayout is supported by the Information-technology 24 * Promotion Agency(IPA), Japan. 25 * 26 */ 27 28 29 #include "gxvmorx.h" 30 31 32 /************************************************************************** 33 * 34 * The macro FT_COMPONENT is used in trace mode. It is an implicit 35 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 36 * messages during execution. 37 */ 38 #undef FT_COMPONENT 39 #define FT_COMPONENT trace_gxvmorx 40 41 42 static void gxv_morx_subtable_type0_entry_validate(FT_UShort state,FT_UShort flags,GXV_XStateTable_GlyphOffsetCPtr glyphOffset_p,FT_Bytes table,FT_Bytes limit,GXV_Validator gxvalid)43 gxv_morx_subtable_type0_entry_validate( 44 FT_UShort state, 45 FT_UShort flags, 46 GXV_XStateTable_GlyphOffsetCPtr glyphOffset_p, 47 FT_Bytes table, 48 FT_Bytes limit, 49 GXV_Validator gxvalid ) 50 { 51 #ifdef GXV_LOAD_UNUSED_VARS 52 FT_UShort markFirst; 53 FT_UShort dontAdvance; 54 FT_UShort markLast; 55 #endif 56 FT_UShort reserved; 57 #ifdef GXV_LOAD_UNUSED_VARS 58 FT_UShort verb; 59 #endif 60 61 FT_UNUSED( state ); 62 FT_UNUSED( glyphOffset_p ); 63 FT_UNUSED( table ); 64 FT_UNUSED( limit ); 65 66 67 #ifdef GXV_LOAD_UNUSED_VARS 68 markFirst = (FT_UShort)( ( flags >> 15 ) & 1 ); 69 dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); 70 markLast = (FT_UShort)( ( flags >> 13 ) & 1 ); 71 #endif 72 73 reserved = (FT_UShort)( flags & 0x1FF0 ); 74 #ifdef GXV_LOAD_UNUSED_VARS 75 verb = (FT_UShort)( flags & 0x000F ); 76 #endif 77 78 if ( 0 < reserved ) 79 { 80 GXV_TRACE(( " non-zero bits found in reserved range\n" )); 81 FT_INVALID_DATA; 82 } 83 } 84 85 86 FT_LOCAL_DEF( void ) gxv_morx_subtable_type0_validate(FT_Bytes table,FT_Bytes limit,GXV_Validator gxvalid)87 gxv_morx_subtable_type0_validate( FT_Bytes table, 88 FT_Bytes limit, 89 GXV_Validator gxvalid ) 90 { 91 FT_Bytes p = table; 92 93 94 GXV_NAME_ENTER( 95 "morx chain subtable type0 (Indic-Script Rearrangement)" ); 96 97 GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); 98 99 gxvalid->xstatetable.optdata = NULL; 100 gxvalid->xstatetable.optdata_load_func = NULL; 101 gxvalid->xstatetable.subtable_setup_func = NULL; 102 gxvalid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; 103 gxvalid->xstatetable.entry_validate_func = 104 gxv_morx_subtable_type0_entry_validate; 105 106 gxv_XStateTable_validate( p, limit, gxvalid ); 107 108 GXV_EXIT; 109 } 110 111 112 /* END */ 113