1 /***************************************************************************/ 2 /* */ 3 /* gxvmorx0.c */ 4 /* */ 5 /* TrueTypeGX/AAT morx table validation */ 6 /* body for type0 (Indic Script Rearrangement) subtable. */ 7 /* */ 8 /* Copyright 2005-2015 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 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 ) 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
