| /**************************************************************************** |
| * |
| * gxvmorx0.c |
| * |
| * TrueTypeGX/AAT morx table validation |
| * body for type0 (Indic Script Rearrangement) subtable. |
| * |
| * Copyright (C) 2005-2020 by |
| * suzuki toshiya, Masatake YAMATO, Red Hat K.K., |
| * David Turner, Robert Wilhelm, and Werner Lemberg. |
| * |
| * This file is part of the FreeType project, and may only be used, |
| * modified, and distributed under the terms of the FreeType project |
| * license, LICENSE.TXT. By continuing to use, modify, or distribute |
| * this file you indicate that you have read the license and |
| * understand and accept it fully. |
| * |
| */ |
| |
| /**************************************************************************** |
| * |
| * gxvalid is derived from both gxlayout module and otvalid module. |
| * Development of gxlayout is supported by the Information-technology |
| * Promotion Agency(IPA), Japan. |
| * |
| */ |
| |
| |
| #include "gxvmorx.h" |
| |
| |
| /************************************************************************** |
| * |
| * The macro FT_COMPONENT is used in trace mode. It is an implicit |
| * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log |
| * messages during execution. |
| */ |
| #undef FT_COMPONENT |
| #define FT_COMPONENT gxvmorx |
| |
| |
| 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 ) |
| { |
| #ifdef GXV_LOAD_UNUSED_VARS |
| FT_UShort markFirst; |
| FT_UShort dontAdvance; |
| FT_UShort markLast; |
| #endif |
| FT_UShort reserved; |
| #ifdef GXV_LOAD_UNUSED_VARS |
| FT_UShort verb; |
| #endif |
| |
| FT_UNUSED( state ); |
| FT_UNUSED( glyphOffset_p ); |
| FT_UNUSED( table ); |
| FT_UNUSED( limit ); |
| |
| |
| #ifdef GXV_LOAD_UNUSED_VARS |
| markFirst = (FT_UShort)( ( flags >> 15 ) & 1 ); |
| dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); |
| markLast = (FT_UShort)( ( flags >> 13 ) & 1 ); |
| #endif |
| |
| reserved = (FT_UShort)( flags & 0x1FF0 ); |
| #ifdef GXV_LOAD_UNUSED_VARS |
| verb = (FT_UShort)( flags & 0x000F ); |
| #endif |
| |
| if ( 0 < reserved ) |
| { |
| GXV_TRACE(( " non-zero bits found in reserved range\n" )); |
| FT_INVALID_DATA; |
| } |
| } |
| |
| |
| FT_LOCAL_DEF( void ) |
| gxv_morx_subtable_type0_validate( FT_Bytes table, |
| FT_Bytes limit, |
| GXV_Validator gxvalid ) |
| { |
| FT_Bytes p = table; |
| |
| |
| GXV_NAME_ENTER( |
| "morx chain subtable type0 (Indic-Script Rearrangement)" ); |
| |
| GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); |
| |
| gxvalid->xstatetable.optdata = NULL; |
| gxvalid->xstatetable.optdata_load_func = NULL; |
| gxvalid->xstatetable.subtable_setup_func = NULL; |
| gxvalid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; |
| gxvalid->xstatetable.entry_validate_func = |
| gxv_morx_subtable_type0_entry_validate; |
| |
| gxv_XStateTable_validate( p, limit, gxvalid ); |
| |
| GXV_EXIT; |
| } |
| |
| |
| /* END */ |
