gxvopbd.c File Reference

#include "gxvalid.h"
#include "gxvcommn.h"

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Classes
struct	GXV_opbd_DataRec_

Macros
#define	FT_COMPONENT   trace_gxvopbd
#define	GXV_OPBD_DATA(FIELD)   GXV_TABLE_DATA( opbd, FIELD )

Typedefs
typedef struct GXV_opbd_DataRec_	GXV_opbd_DataRec
typedef struct GXV_opbd_DataRec_ *	GXV_opbd_Data

Functions
static void	gxv_opbd_LookupValue_validate (FT_UShort glyph, GXV_LookupValueCPtr value_p, GXV_Validator gxvalid)
static GXV_LookupValueDesc	gxv_opbd_LookupFmt4_transit (FT_UShort relative_gindex, GXV_LookupValueCPtr base_value_p, FT_Bytes lookuptbl_limit, GXV_Validator gxvalid)
	gxv_opbd_validate (FT_Bytes table, FT_Face face, FT_Validator ftvalid)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   trace_gxvopbd

Definition at line 39 of file gxvopbd.c.

GXV_OPBD_DATA

#define GXV_OPBD_DATA

(

FIELD

)

GXV_TABLE_DATA( opbd, FIELD )

Definition at line 58 of file gxvopbd.c.

Typedef Documentation

GXV_opbd_Data

typedef struct GXV_opbd_DataRec_ * GXV_opbd_Data

GXV_opbd_DataRec

typedef struct GXV_opbd_DataRec_ GXV_opbd_DataRec

Function Documentation

gxv_opbd_LookupFmt4_transit()

static GXV_LookupValueDesc gxv_opbd_LookupFmt4_transit ( FT_UShort  relative_gindex, GXV_LookupValueCPtr  base_value_p, FT_Bytes  lookuptbl_limit, GXV_Validator  gxvalid  )

static

Definition at line 135 of file gxvopbd.c.

  {
    GXV_LookupValueDesc  value;

    FT_UNUSED( lookuptbl_limit );
    FT_UNUSED( gxvalid );

    /* XXX: check range? */
    value.u = (FT_UShort)( base_value_p->u +
                           relative_gindex * 4 * sizeof ( FT_Short ) );

    return value;
  }

Referenced by gxv_opbd_validate().

gxv_opbd_LookupValue_validate()

static void gxv_opbd_LookupValue_validate ( FT_UShort  glyph, GXV_LookupValueCPtr  value_p, GXV_Validator  gxvalid  )

static

Definition at line 70 of file gxvopbd.c.

  {
    /* offset in LookupTable is measured from the head of opbd table */
    FT_Bytes   p     = gxvalid->root->base + value_p->u;
    FT_Bytes   limit = gxvalid->root->limit;
    FT_Short   delta_value;
    int        i;


    if ( value_p->u < GXV_OPBD_DATA( valueOffset_min ) )
      GXV_OPBD_DATA( valueOffset_min ) = value_p->u;

    for ( i = 0; i < 4; i++ )
    {
      GXV_LIMIT_CHECK( 2 );
      delta_value = FT_NEXT_SHORT( p );

      if ( GXV_OPBD_DATA( format ) )    /* format 1, value is ctrl pt. */
      {
        if ( delta_value == -1 )
          continue;

        gxv_ctlPoint_validate( glyph, (FT_UShort)delta_value, gxvalid );
      }
      else                              /* format 0, value is distance */
        continue;
    }
  }

Referenced by gxv_opbd_validate().

gxv_opbd_validate()

gxv_opbd_validate	(	FT_Bytes	table,
		FT_Face	face,
		FT_Validator	ftvalid
	)

Definition at line 162 of file gxvopbd.c.

  {
    GXV_ValidatorRec  gxvalidrec;
    GXV_Validator     gxvalid = &gxvalidrec;
    GXV_opbd_DataRec  opbdrec;
    GXV_opbd_Data     opbd  = &opbdrec;
    FT_Bytes          p     = table;
    FT_Bytes          limit = 0;

    FT_ULong  version;


    gxvalid->root       = ftvalid;
    gxvalid->table_data = opbd;
    gxvalid->face       = face;

    FT_TRACE3(( "validating `opbd' table\n" ));
    GXV_INIT;
    GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;


    GXV_LIMIT_CHECK( 4 + 2 );
    version                 = FT_NEXT_ULONG( p );
    GXV_OPBD_DATA( format ) = FT_NEXT_USHORT( p );


    /* only 0x00010000 is defined (1996) */
    GXV_TRACE(( "(version=0x%08x)\n", version ));
    if ( 0x00010000UL != version )
      FT_INVALID_FORMAT;

    /* only values 0 and 1 are defined (1996) */
    GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));
    if ( 0x0001 < GXV_OPBD_DATA( format ) )
      FT_INVALID_FORMAT;

    gxvalid->lookupval_sign   = GXV_LOOKUPVALUE_UNSIGNED;
    gxvalid->lookupval_func   = gxv_opbd_LookupValue_validate;
    gxvalid->lookupfmt4_trans = gxv_opbd_LookupFmt4_transit;

    gxv_LookupTable_validate( p, limit, gxvalid );
    p += gxvalid->subtable_length;

    if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )
    {
      GXV_TRACE((
        "found overlap between LookupTable and opbd_value array\n" ));
      FT_INVALID_OFFSET;
    }

    FT_TRACE4(( "\n" ));
  }