gxvmort2.c File Reference

#include "gxvmort.h"

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Classes
struct	GXV_mort_subtable_type2_StateOptRec_

Macros
#define	FT_COMPONENT   trace_gxvmort
#define	GXV_MORT_SUBTABLE_TYPE2_HEADER_SIZE    ( GXV_STATETABLE_HEADER_SIZE + 2 + 2 + 2 )

Typedefs
typedef struct GXV_mort_subtable_type2_StateOptRec_	GXV_mort_subtable_type2_StateOptRec
typedef struct GXV_mort_subtable_type2_StateOptRec_ *	GXV_mort_subtable_type2_StateOptRecData

Functions
static void	gxv_mort_subtable_type2_opttable_load (FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
static void	gxv_mort_subtable_type2_subtable_setup (FT_UShort table_size, FT_UShort classTable, FT_UShort stateArray, FT_UShort entryTable, FT_UShort *classTable_length_p, FT_UShort *stateArray_length_p, FT_UShort *entryTable_length_p, GXV_Validator gxvalid)
static void	gxv_mort_subtable_type2_ligActionOffset_validate (FT_Bytes table, FT_UShort ligActionOffset, GXV_Validator gxvalid)
static void	gxv_mort_subtable_type2_entry_validate (FT_Byte state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
static void	gxv_mort_subtable_type2_ligatureTable_validate (FT_Bytes table, GXV_Validator gxvalid)
	gxv_mort_subtable_type2_validate (FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   trace_gxvmort

Definition at line 39 of file gxvmort2.c.

GXV_MORT_SUBTABLE_TYPE2_HEADER_SIZE

#define GXV_MORT_SUBTABLE_TYPE2_HEADER_SIZE    ( GXV_STATETABLE_HEADER_SIZE + 2 + 2 + 2 )

Definition at line 54 of file gxvmort2.c.

Typedef Documentation

GXV_mort_subtable_type2_StateOptRec

typedef struct GXV_mort_subtable_type2_StateOptRec_ GXV_mort_subtable_type2_StateOptRec

GXV_mort_subtable_type2_StateOptRecData

typedef struct GXV_mort_subtable_type2_StateOptRec_ * GXV_mort_subtable_type2_StateOptRecData

Function Documentation

gxv_mort_subtable_type2_entry_validate()

static void gxv_mort_subtable_type2_entry_validate ( FT_Byte  state, FT_UShort  flags, GXV_StateTable_GlyphOffsetCPtr  glyphOffset_p, FT_Bytes  table, FT_Bytes  limit, GXV_Validator  gxvalid  )

static

Definition at line 212 of file gxvmort2.c.

  {
#ifdef GXV_LOAD_UNUSED_VARS
    FT_UShort setComponent;
    FT_UShort dontAdvance;
#endif
    FT_UShort offset;
 
    FT_UNUSED( state );
    FT_UNUSED( glyphOffset_p );
    FT_UNUSED( limit );
 
 
#ifdef GXV_LOAD_UNUSED_VARS
    setComponent = (FT_UShort)( ( flags >> 15 ) & 1 );
    dontAdvance  = (FT_UShort)( ( flags >> 14 ) & 1 );
#endif
 
    offset = (FT_UShort)( flags & 0x3FFFU );
 
    if ( 0 < offset )
      gxv_mort_subtable_type2_ligActionOffset_validate( table, offset,
                                                        gxvalid );
  }

Referenced by gxv_mort_subtable_type2_validate().

gxv_mort_subtable_type2_ligActionOffset_validate()

static void gxv_mort_subtable_type2_ligActionOffset_validate ( FT_Bytes  table, FT_UShort  ligActionOffset, GXV_Validator  gxvalid  )

static

Definition at line 138 of file gxvmort2.c.

  {
    /* access ligActionTable */
    GXV_mort_subtable_type2_StateOptRecData  optdata =
      (GXV_mort_subtable_type2_StateOptRecData)gxvalid->statetable.optdata;
 
    FT_Bytes lat_base  = table + optdata->ligActionTable;
    FT_Bytes p         = table + ligActionOffset;
    FT_Bytes lat_limit = lat_base + optdata->ligActionTable;
 
 
    GXV_32BIT_ALIGNMENT_VALIDATE( ligActionOffset );
    if ( p < lat_base )
    {
      GXV_TRACE(( "too short offset 0x%04x: p < lat_base (%d byte rewind)\n",
                  ligActionOffset, lat_base - p ));
 
      /* FontValidator, ftxvalidator, ftxdumperfuser warn but continue */
      GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
    }
    else if ( lat_limit < p )
    {
      GXV_TRACE(( "too large offset 0x%04x: lat_limit < p (%d byte overrun)\n",
                  ligActionOffset, p - lat_limit ));
 
      /* FontValidator, ftxvalidator, ftxdumperfuser warn but continue */
      GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
    }
    else
    {
      /* validate entry in ligActionTable */
      FT_ULong   lig_action;
#ifdef GXV_LOAD_UNUSED_VARS
      FT_UShort  last;
      FT_UShort  store;
#endif
      FT_ULong   offset;
 
 
      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
 
      /* Apple spec defines this offset as a word offset */
      offset = lig_action & 0x3FFFFFFFUL;
      if ( offset * 2 < optdata->ligatureTable )
      {
        GXV_TRACE(( "too short offset 0x%08x:"
                    " 2 x offset < ligatureTable (%d byte rewind)\n",
                     offset, optdata->ligatureTable - offset * 2 ));
 
        GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
      } else if ( offset * 2 >
                  optdata->ligatureTable + optdata->ligatureTable_length )
      {
        GXV_TRACE(( "too long offset 0x%08x:"
                    " 2 x offset > ligatureTable + ligatureTable_length"
                    " (%d byte overrun)\n",
                     offset,
                     optdata->ligatureTable + optdata->ligatureTable_length
                     - offset * 2 ));
 
        GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
      }
    }
  }

Referenced by gxv_mort_subtable_type2_entry_validate().

gxv_mort_subtable_type2_ligatureTable_validate()

static void gxv_mort_subtable_type2_ligatureTable_validate ( FT_Bytes  table, GXV_Validator  gxvalid  )

static

Definition at line 245 of file gxvmort2.c.

  {
    GXV_mort_subtable_type2_StateOptRecData  optdata =
      (GXV_mort_subtable_type2_StateOptRecData)gxvalid->statetable.optdata;
 
    FT_Bytes p     = table + optdata->ligatureTable;
    FT_Bytes limit = table + optdata->ligatureTable
                           + optdata->ligatureTable_length;
 
 
    GXV_NAME_ENTER( "mort 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 ( gxvalid->face->num_glyphs < lig_gid )
          GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
      }
    }
    GXV_EXIT;
  }

Referenced by gxv_mort_subtable_type2_validate().

gxv_mort_subtable_type2_opttable_load()

static void gxv_mort_subtable_type2_opttable_load ( FT_Bytes  table, FT_Bytes  limit, GXV_Validator  gxvalid  )

static

Definition at line 59 of file gxvmort2.c.

  {
    FT_Bytes  p = table;
    GXV_mort_subtable_type2_StateOptRecData  optdata =
      (GXV_mort_subtable_type2_StateOptRecData)gxvalid->statetable.optdata;
 
 
    GXV_LIMIT_CHECK( 2 + 2 + 2 );
    optdata->ligActionTable = FT_NEXT_USHORT( p );
    optdata->componentTable = FT_NEXT_USHORT( p );
    optdata->ligatureTable  = FT_NEXT_USHORT( p );
 
    GXV_TRACE(( "offset to ligActionTable=0x%04x\n",
                optdata->ligActionTable ));
    GXV_TRACE(( "offset to componentTable=0x%04x\n",
                optdata->componentTable ));
    GXV_TRACE(( "offset to ligatureTable=0x%04x\n",
                optdata->ligatureTable ));
  }

Referenced by gxv_mort_subtable_type2_validate().

gxv_mort_subtable_type2_subtable_setup()

static void gxv_mort_subtable_type2_subtable_setup ( FT_UShort  table_size, FT_UShort  classTable, FT_UShort  stateArray, FT_UShort  entryTable, FT_UShort *  classTable_length_p, FT_UShort *  stateArray_length_p, FT_UShort *  entryTable_length_p, GXV_Validator  gxvalid  )

static

Definition at line 83 of file gxvmort2.c.

  {
    FT_UShort  o[6];
    FT_UShort  *l[6];
    FT_UShort  buff[7];
 
    GXV_mort_subtable_type2_StateOptRecData  optdata =
      (GXV_mort_subtable_type2_StateOptRecData)gxvalid->statetable.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_ushort_offset( o, l, buff, 6, table_size, gxvalid );
 
    GXV_TRACE(( "classTable: offset=0x%04x length=0x%04x\n",
                classTable, *classTable_length_p ));
    GXV_TRACE(( "stateArray: offset=0x%04x length=0x%04x\n",
                stateArray, *stateArray_length_p ));
    GXV_TRACE(( "entryTable: offset=0x%04x length=0x%04x\n",
                entryTable, *entryTable_length_p ));
    GXV_TRACE(( "ligActionTable: offset=0x%04x length=0x%04x\n",
                optdata->ligActionTable,
                optdata->ligActionTable_length ));
    GXV_TRACE(( "componentTable: offset=0x%04x length=0x%04x\n",
                optdata->componentTable,
                optdata->componentTable_length ));
    GXV_TRACE(( "ligatureTable:  offset=0x%04x length=0x%04x\n",
                optdata->ligatureTable,
                optdata->ligatureTable_length ));
 
    GXV_EXIT;
  }

Referenced by gxv_mort_subtable_type2_validate().

gxv_mort_subtable_type2_validate()

gxv_mort_subtable_type2_validate	(	FT_Bytes	table,
		FT_Bytes	limit,
		GXV_Validator	gxvalid
	)

Definition at line 277 of file gxvmort2.c.

  {
    FT_Bytes  p = table;
 
    GXV_mort_subtable_type2_StateOptRec  lig_rec;
 
 
    GXV_NAME_ENTER( "mort chain subtable type2 (Ligature Substitution)" );
 
    GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE2_HEADER_SIZE );
 
    gxvalid->statetable.optdata =
      &lig_rec;
    gxvalid->statetable.optdata_load_func =
      gxv_mort_subtable_type2_opttable_load;
    gxvalid->statetable.subtable_setup_func =
      gxv_mort_subtable_type2_subtable_setup;
    gxvalid->statetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_NONE;
    gxvalid->statetable.entry_validate_func =
      gxv_mort_subtable_type2_entry_validate;
 
    gxv_StateTable_validate( p, limit, gxvalid );
 
    p += gxvalid->subtable_length;
    gxv_mort_subtable_type2_ligatureTable_validate( table, gxvalid );
 
    gxvalid->subtable_length = (FT_ULong)( p - table );
 
    GXV_EXIT;
  }

Referenced by gxv_mort_subtables_validate().