gxvmorx2.c File Reference

#include "gxvmorx.h"

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Classes
struct	GXV_morx_subtable_type2_StateOptRec_

Macros
#define	FT_COMPONENT   trace_gxvmorx
#define	GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE    ( GXV_XSTATETABLE_HEADER_SIZE + 4 + 4 + 4 )
#define	GXV_MORX_LIGACTION_ENTRY_SIZE   4

Typedefs
typedef struct GXV_morx_subtable_type2_StateOptRec_	GXV_morx_subtable_type2_StateOptRec
typedef struct GXV_morx_subtable_type2_StateOptRec_ *	GXV_morx_subtable_type2_StateOptRecData

Functions
static void	gxv_morx_subtable_type2_opttable_load (FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
static void	gxv_morx_subtable_type2_subtable_setup (FT_ULong table_size, FT_ULong classTable, FT_ULong stateArray, FT_ULong entryTable, FT_ULong *classTable_length_p, FT_ULong *stateArray_length_p, FT_ULong *entryTable_length_p, GXV_Validator gxvalid)
static void	gxv_morx_subtable_type2_ligActionIndex_validate (FT_Bytes table, FT_UShort ligActionIndex, GXV_Validator gxvalid)
static void	gxv_morx_subtable_type2_entry_validate (FT_UShort state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
static void	gxv_morx_subtable_type2_ligatureTable_validate (FT_Bytes table, GXV_Validator gxvalid)
	gxv_morx_subtable_type2_validate (FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   trace_gxvmorx

Definition at line 39 of file gxvmorx2.c.

GXV_MORX_LIGACTION_ENTRY_SIZE

#define GXV_MORX_LIGACTION_ENTRY_SIZE   4

Definition at line 139 of file gxvmorx2.c.

GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE

#define GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE    ( GXV_XSTATETABLE_HEADER_SIZE + 4 + 4 + 4 )

Definition at line 55 of file gxvmorx2.c.

Typedef Documentation

GXV_morx_subtable_type2_StateOptRec

typedef struct GXV_morx_subtable_type2_StateOptRec_ GXV_morx_subtable_type2_StateOptRec

GXV_morx_subtable_type2_StateOptRecData

typedef struct GXV_morx_subtable_type2_StateOptRec_ * GXV_morx_subtable_type2_StateOptRecData

Function Documentation

gxv_morx_subtable_type2_entry_validate()

static void gxv_morx_subtable_type2_entry_validate ( FT_UShort  state, FT_UShort  flags, GXV_StateTable_GlyphOffsetCPtr  glyphOffset_p, FT_Bytes  table, FT_Bytes  limit, GXV_Validator  gxvalid  )

static

Definition at line 224 of file gxvmorx2.c.

  {
#ifdef GXV_LOAD_UNUSED_VARS
    FT_UShort  setComponent;
    FT_UShort  dontAdvance;
    FT_UShort  performAction;
#endif
    FT_UShort  reserved;
    FT_UShort  ligActionIndex;
 
    FT_UNUSED( state );
    FT_UNUSED( limit );
 
 
#ifdef GXV_LOAD_UNUSED_VARS
    setComponent   = (FT_UShort)( ( flags >> 15 ) & 1 );
    dontAdvance    = (FT_UShort)( ( flags >> 14 ) & 1 );
    performAction  = (FT_UShort)( ( flags >> 13 ) & 1 );
#endif
 
    reserved       = (FT_UShort)( flags & 0x1FFF );
    ligActionIndex = glyphOffset_p->u;
 
    if ( reserved > 0 )
      GXV_TRACE(( "  reserved 14bit is non-zero\n" ));
 
    if ( 0 < ligActionIndex )
      gxv_morx_subtable_type2_ligActionIndex_validate(
        table, ligActionIndex, gxvalid );
  }

Referenced by gxv_morx_subtable_type2_validate().

gxv_morx_subtable_type2_ligActionIndex_validate()

static void gxv_morx_subtable_type2_ligActionIndex_validate ( FT_Bytes  table, FT_UShort  ligActionIndex, GXV_Validator  gxvalid  )

static

Definition at line 143 of file gxvmorx2.c.

  {
    /* access ligActionTable */
    GXV_morx_subtable_type2_StateOptRecData optdata =
      (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
 
    FT_Bytes lat_base  = table + optdata->ligActionTable;
    FT_Bytes p         = lat_base +
                         ligActionIndex * GXV_MORX_LIGACTION_ENTRY_SIZE;
    FT_Bytes lat_limit = lat_base + optdata->ligActionTable;
 
 
    if ( p < lat_base )
    {
      GXV_TRACE(( "p < lat_base (%d byte rewind)\n", lat_base - p ));
      FT_INVALID_OFFSET;
    }
    else if ( lat_limit < p )
    {
      GXV_TRACE(( "lat_limit < p (%d byte overrun)\n", p - lat_limit ));
      FT_INVALID_OFFSET;
    }
 
    {
      /* validate entry in ligActionTable */
      FT_ULong   lig_action;
#ifdef GXV_LOAD_UNUSED_VARS
      FT_UShort  last;
      FT_UShort  store;
#endif
      FT_ULong   offset;
      FT_Long    gid_limit;
 
 
      lig_action = FT_NEXT_ULONG( p );
#ifdef GXV_LOAD_UNUSED_VARS
      last       = (FT_UShort)( ( lig_action >> 31 ) & 1 );
      store      = (FT_UShort)( ( lig_action >> 30 ) & 1 );
#endif
 
      offset = lig_action & 0x3FFFFFFFUL;
 
      /* this offset is 30-bit signed value to add to GID */
      /* it is different from the location offset in mort */
      if ( ( offset & 0x3FFF0000UL ) == 0x3FFF0000UL )
      { /* negative offset */
        gid_limit = gxvalid->face->num_glyphs -
                    (FT_Long)( offset & 0x0000FFFFUL );
        if ( gid_limit > 0 )
          return;
 
        GXV_TRACE(( "ligature action table includes"
                    " too negative offset moving all GID"
                    " below defined range: 0x%04x\n",
                    offset & 0xFFFFU ));
        GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
      }
      else if ( ( offset & 0x3FFF0000UL ) == 0x00000000UL )
      { /* positive offset */
        if ( (FT_Long)offset < gxvalid->face->num_glyphs )
          return;
 
        GXV_TRACE(( "ligature action table includes"
                    " too large offset moving all GID"
                    " over defined range: 0x%04x\n",
                    offset & 0xFFFFU ));
        GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
      }
 
      GXV_TRACE(( "ligature action table includes"
                  " invalid offset to add to 16-bit GID:"
                  " 0x%08x\n", offset ));
      GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
    }
  }

Referenced by gxv_morx_subtable_type2_entry_validate().

gxv_morx_subtable_type2_ligatureTable_validate()

static void gxv_morx_subtable_type2_ligatureTable_validate ( FT_Bytes  table, GXV_Validator  gxvalid  )

static

Definition at line 263 of file gxvmorx2.c.

  {
    GXV_morx_subtable_type2_StateOptRecData  optdata =
      (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
 
    FT_Bytes p     = table + optdata->ligatureTable;
    FT_Bytes limit = table + optdata->ligatureTable
                           + optdata->ligatureTable_length;
 
 
    GXV_NAME_ENTER( "morx chain subtable type2 - substitutionTable" );
 
    if ( 0 != optdata->ligatureTable )
    {
      /* Apple does not give specification of ligatureTable format */
      while ( p < limit )
      {
        FT_UShort  lig_gid;
 
 
        GXV_LIMIT_CHECK( 2 );
        lig_gid = FT_NEXT_USHORT( p );
        if ( lig_gid < gxvalid->face->num_glyphs )
          GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
      }
    }
 
    GXV_EXIT;
  }

Referenced by gxv_morx_subtable_type2_validate().

gxv_morx_subtable_type2_opttable_load()

static void gxv_morx_subtable_type2_opttable_load ( FT_Bytes  table, FT_Bytes  limit, GXV_Validator  gxvalid  )

static

Definition at line 60 of file gxvmorx2.c.

  {
    FT_Bytes  p = table;
 
    GXV_morx_subtable_type2_StateOptRecData  optdata =
      (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
 
 
    GXV_LIMIT_CHECK( 4 + 4 + 4 );
    optdata->ligActionTable = FT_NEXT_ULONG( p );
    optdata->componentTable = FT_NEXT_ULONG( p );
    optdata->ligatureTable  = FT_NEXT_ULONG( p );
 
    GXV_TRACE(( "offset to ligActionTable=0x%08x\n",
                optdata->ligActionTable ));
    GXV_TRACE(( "offset to componentTable=0x%08x\n",
                optdata->componentTable ));
    GXV_TRACE(( "offset to ligatureTable=0x%08x\n",
                optdata->ligatureTable ));
  }

Referenced by gxv_morx_subtable_type2_validate().

gxv_morx_subtable_type2_subtable_setup()

static void gxv_morx_subtable_type2_subtable_setup ( FT_ULong  table_size, FT_ULong  classTable, FT_ULong  stateArray, FT_ULong  entryTable, FT_ULong *  classTable_length_p, FT_ULong *  stateArray_length_p, FT_ULong *  entryTable_length_p, GXV_Validator  gxvalid  )

static

Definition at line 85 of file gxvmorx2.c.

  {
    FT_ULong   o[6];
    FT_ULong*  l[6];
    FT_ULong   buff[7];
 
    GXV_morx_subtable_type2_StateOptRecData  optdata =
      (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
 
 
    GXV_NAME_ENTER( "subtable boundaries setup" );
 
    o[0] = classTable;
    o[1] = stateArray;
    o[2] = entryTable;
    o[3] = optdata->ligActionTable;
    o[4] = optdata->componentTable;
    o[5] = optdata->ligatureTable;
    l[0] = classTable_length_p;
    l[1] = stateArray_length_p;
    l[2] = entryTable_length_p;
    l[3] = &(optdata->ligActionTable_length);
    l[4] = &(optdata->componentTable_length);
    l[5] = &(optdata->ligatureTable_length);
 
    gxv_set_length_by_ulong_offset( o, l, buff, 6, table_size, gxvalid );
 
    GXV_TRACE(( "classTable: offset=0x%08x length=0x%08x\n",
                classTable, *classTable_length_p ));
    GXV_TRACE(( "stateArray: offset=0x%08x length=0x%08x\n",
                stateArray, *stateArray_length_p ));
    GXV_TRACE(( "entryTable: offset=0x%08x length=0x%08x\n",
                entryTable, *entryTable_length_p ));
    GXV_TRACE(( "ligActionTable: offset=0x%08x length=0x%08x\n",
                optdata->ligActionTable,
                optdata->ligActionTable_length ));
    GXV_TRACE(( "componentTable: offset=0x%08x length=0x%08x\n",
                optdata->componentTable,
                optdata->componentTable_length ));
    GXV_TRACE(( "ligatureTable:  offset=0x%08x length=0x%08x\n",
                optdata->ligatureTable,
                optdata->ligatureTable_length ));
 
    GXV_EXIT;
  }

Referenced by gxv_morx_subtable_type2_validate().

gxv_morx_subtable_type2_validate()

gxv_morx_subtable_type2_validate	(	FT_Bytes	table,
		FT_Bytes	limit,
		GXV_Validator	gxvalid
	)

Definition at line 296 of file gxvmorx2.c.

  {
    FT_Bytes  p = table;
 
    GXV_morx_subtable_type2_StateOptRec  lig_rec;
 
 
    GXV_NAME_ENTER( "morx chain subtable type2 (Ligature Substitution)" );
 
    GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE );
 
    gxvalid->xstatetable.optdata =
      &lig_rec;
    gxvalid->xstatetable.optdata_load_func =
      gxv_morx_subtable_type2_opttable_load;
    gxvalid->xstatetable.subtable_setup_func =
      gxv_morx_subtable_type2_subtable_setup;
    gxvalid->xstatetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_USHORT;
    gxvalid->xstatetable.entry_validate_func =
      gxv_morx_subtable_type2_entry_validate;
 
    gxv_XStateTable_validate( p, limit, gxvalid );
 
#if 0
    p += gxvalid->subtable_length;
#endif
    gxv_morx_subtable_type2_ligatureTable_validate( table, gxvalid );
 
    GXV_EXIT;
  }

Referenced by gxv_morx_subtables_validate().