reactos/dll/3rdparty/freetype/src/gxvalid/gxvmorx0.c

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