otvmath.c File Reference

#include "otvalid.h"
#include "otvcommn.h"
#include "otvgpos.h"

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Macros
#define	FT_COMPONENT   trace_otvmath

Functions
static void	otv_MathConstants_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_MathItalicsCorrectionInfo_validate (FT_Bytes table, OTV_Validator otvalid, FT_Int isItalic)
static void	otv_MathKern_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_MathKernInfo_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_MathGlyphInfo_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_GlyphAssembly_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_MathGlyphConstruction_validate (FT_Bytes table, OTV_Validator otvalid)
static void	otv_MathVariants_validate (FT_Bytes table, OTV_Validator otvalid)
	otv_MATH_validate (FT_Bytes table, FT_UInt glyph_count, FT_Validator ftvalid)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   trace_otvmath

Definition at line 33 of file otvmath.c.

Function Documentation

otv_GlyphAssembly_validate()

static void otv_GlyphAssembly_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 274 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   pcnt, table_size;
    FT_UInt   i;
 
    OTV_OPTIONAL_TABLE( DeviceTableOffset );
 
 
    /* OTV_NAME_ENTER( "GlyphAssembly" ); */
 
    OTV_LIMIT_CHECK( 6 );
 
    p += 2;                           /* Skip the Italics Correction value */
    OTV_OPTIONAL_OFFSET( DeviceTableOffset );
    pcnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 8 * pcnt );
    table_size = 6 + 8 * pcnt;
 
    OTV_SIZE_CHECK( DeviceTableOffset );
    if ( DeviceTableOffset )
      otv_Device_validate( table + DeviceTableOffset, otvalid );
 
    for ( i = 0; i < pcnt; i++ )
    {
      FT_UInt  gid;
 
 
      gid = FT_NEXT_USHORT( p );
      if ( gid >= otvalid->glyph_count )
        FT_INVALID_GLYPH_ID;
      p += 2*4;             /* skip the Start, End, Full, and Flags fields */
    }
 
    /* OTV_EXIT; */
  }

Referenced by otv_MathGlyphConstruction_validate().

otv_MATH_validate()

otv_MATH_validate	(	FT_Bytes	table,
		FT_UInt	glyph_count,
		FT_Validator	ftvalid
	)

Definition at line 416 of file otvmath.c.

  {
    OTV_ValidatorRec  otvalidrec;
    OTV_Validator     otvalid = &otvalidrec;
    FT_Bytes          p       = table;
    FT_UInt           MathConstants, MathGlyphInfo, MathVariants;
 
 
    otvalid->root = ftvalid;
 
    FT_TRACE3(( "validating MATH table\n" ));
    OTV_INIT;
 
    OTV_LIMIT_CHECK( 10 );
 
    if ( FT_NEXT_ULONG( p ) != 0x10000UL )      /* Version */
      FT_INVALID_FORMAT;
 
    MathConstants = FT_NEXT_USHORT( p );
    MathGlyphInfo = FT_NEXT_USHORT( p );
    MathVariants  = FT_NEXT_USHORT( p );
 
    otvalid->glyph_count = glyph_count;
 
    otv_MathConstants_validate( table + MathConstants,
                                otvalid );
    otv_MathGlyphInfo_validate( table + MathGlyphInfo,
                                otvalid );
    otv_MathVariants_validate ( table + MathVariants,
                                otvalid );
 
    FT_TRACE4(( "\n" ));
  }

Referenced by otv_validate().

otv_MathConstants_validate()

static void otv_MathConstants_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 46 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   i;
    FT_UInt   table_size;
 
    OTV_OPTIONAL_TABLE( DeviceTableOffset );
 
 
    OTV_NAME_ENTER( "MathConstants" );
 
    /* 56 constants, 51 have device tables */
    OTV_LIMIT_CHECK( 2 * ( 56 + 51 ) );
    table_size = 2 * ( 56 + 51 );
 
    p += 4 * 2;                 /* First 4 constants have no device tables */
    for ( i = 0; i < 51; i++ )
    {
      p += 2;                                            /* skip the value */
      OTV_OPTIONAL_OFFSET( DeviceTableOffset );
      OTV_SIZE_CHECK( DeviceTableOffset );
      if ( DeviceTableOffset )
        otv_Device_validate( table + DeviceTableOffset, otvalid );
    }
 
    OTV_EXIT;
  }

Referenced by otv_MATH_validate().

otv_MathGlyphConstruction_validate()

static void otv_MathGlyphConstruction_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 315 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   vcnt, table_size;
    FT_UInt   i;
 
    OTV_OPTIONAL_TABLE( GlyphAssembly );
 
 
    /* OTV_NAME_ENTER( "MathGlyphConstruction" ); */
 
    OTV_LIMIT_CHECK( 4 );
 
    OTV_OPTIONAL_OFFSET( GlyphAssembly );
    vcnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 4 * vcnt );
    table_size = 4 + 4 * vcnt;
 
    for ( i = 0; i < vcnt; i++ )
    {
      FT_UInt  gid;
 
 
      gid = FT_NEXT_USHORT( p );
      if ( gid >= otvalid->glyph_count )
        FT_INVALID_GLYPH_ID;
      p += 2;                          /* skip the size */
    }
 
    OTV_SIZE_CHECK( GlyphAssembly );
    if ( GlyphAssembly )
      otv_GlyphAssembly_validate( table+GlyphAssembly, otvalid );
 
    /* OTV_EXIT; */
  }

Referenced by otv_MathVariants_validate().

otv_MathGlyphInfo_validate()

static void otv_MathGlyphInfo_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 225 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   MathItalicsCorrectionInfo, MathTopAccentAttachment;
    FT_UInt   ExtendedShapeCoverage, MathKernInfo;
 
 
    OTV_NAME_ENTER( "MathGlyphInfo" );
 
    OTV_LIMIT_CHECK( 8 );
 
    MathItalicsCorrectionInfo = FT_NEXT_USHORT( p );
    MathTopAccentAttachment   = FT_NEXT_USHORT( p );
    ExtendedShapeCoverage     = FT_NEXT_USHORT( p );
    MathKernInfo              = FT_NEXT_USHORT( p );
 
    if ( MathItalicsCorrectionInfo )
      otv_MathItalicsCorrectionInfo_validate(
        table + MathItalicsCorrectionInfo, otvalid, TRUE );
 
    /* Italic correction and Top Accent Attachment have the same format */
    if ( MathTopAccentAttachment )
      otv_MathItalicsCorrectionInfo_validate(
        table + MathTopAccentAttachment, otvalid, FALSE );
 
    if ( ExtendedShapeCoverage )
    {
      OTV_NAME_ENTER( "ExtendedShapeCoverage" );
      otv_Coverage_validate( table + ExtendedShapeCoverage, otvalid, -1 );
      OTV_EXIT;
    }
 
    if ( MathKernInfo )
      otv_MathKernInfo_validate( table + MathKernInfo, otvalid );
 
    OTV_EXIT;
  }

Referenced by otv_MATH_validate().

otv_MathItalicsCorrectionInfo_validate()

static void otv_MathItalicsCorrectionInfo_validate ( FT_Bytes  table, OTV_Validator  otvalid, FT_Int  isItalic  )

static

Definition at line 86 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   i, cnt, table_size;
 
    OTV_OPTIONAL_TABLE( Coverage );
    OTV_OPTIONAL_TABLE( DeviceTableOffset );
 
    FT_UNUSED( isItalic );  /* only used if tracing is active */
 
 
    OTV_NAME_ENTER( isItalic ? "MathItalicsCorrectionInfo"
                             : "MathTopAccentAttachment" );
 
    OTV_LIMIT_CHECK( 4 );
 
    OTV_OPTIONAL_OFFSET( Coverage );
    cnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 4 * cnt );
    table_size = 4 + 4 * cnt;
 
    OTV_SIZE_CHECK( Coverage );
    otv_Coverage_validate( table + Coverage, otvalid, (FT_Int)cnt );
 
    for ( i = 0; i < cnt; i++ )
    {
      p += 2;                                            /* Skip the value */
      OTV_OPTIONAL_OFFSET( DeviceTableOffset );
      OTV_SIZE_CHECK( DeviceTableOffset );
      if ( DeviceTableOffset )
        otv_Device_validate( table + DeviceTableOffset, otvalid );
    }
 
    OTV_EXIT;
  }

Referenced by otv_MathGlyphInfo_validate().

otv_MathKern_validate()

static void otv_MathKern_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 135 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   i, cnt, table_size;
 
    OTV_OPTIONAL_TABLE( DeviceTableOffset );
 
 
    /* OTV_NAME_ENTER( "MathKern" );*/
 
    OTV_LIMIT_CHECK( 2 );
 
    cnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 4 * cnt + 2 );
    table_size = 4 + 4 * cnt;
 
    /* Heights */
    for ( i = 0; i < cnt; i++ )
    {
      p += 2;                                            /* Skip the value */
      OTV_OPTIONAL_OFFSET( DeviceTableOffset );
      OTV_SIZE_CHECK( DeviceTableOffset );
      if ( DeviceTableOffset )
        otv_Device_validate( table + DeviceTableOffset, otvalid );
    }
 
    /* One more Kerning value */
    for ( i = 0; i < cnt + 1; i++ )
    {
      p += 2;                                            /* Skip the value */
      OTV_OPTIONAL_OFFSET( DeviceTableOffset );
      OTV_SIZE_CHECK( DeviceTableOffset );
      if ( DeviceTableOffset )
        otv_Device_validate( table + DeviceTableOffset, otvalid );
    }
 
    OTV_EXIT;
  }

Referenced by otv_MathKernInfo_validate().

otv_MathKernInfo_validate()

static void otv_MathKernInfo_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 178 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   i, j, cnt, table_size;
 
    OTV_OPTIONAL_TABLE( Coverage );
    OTV_OPTIONAL_TABLE( MKRecordOffset );
 
 
    OTV_NAME_ENTER( "MathKernInfo" );
 
    OTV_LIMIT_CHECK( 4 );
 
    OTV_OPTIONAL_OFFSET( Coverage );
    cnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 8 * cnt );
    table_size = 4 + 8 * cnt;
 
    OTV_SIZE_CHECK( Coverage );
    otv_Coverage_validate( table + Coverage, otvalid, (FT_Int)cnt );
 
    for ( i = 0; i < cnt; i++ )
    {
      for ( j = 0; j < 4; j++ )
      {
        OTV_OPTIONAL_OFFSET( MKRecordOffset );
        OTV_SIZE_CHECK( MKRecordOffset );
        if ( MKRecordOffset )
          otv_MathKern_validate( table + MKRecordOffset, otvalid );
      }
    }
 
    OTV_EXIT;
  }

Referenced by otv_MathGlyphInfo_validate().

otv_MathVariants_validate()

static void otv_MathVariants_validate ( FT_Bytes  table, OTV_Validator  otvalid  )

static

Definition at line 355 of file otvmath.c.

  {
    FT_Bytes  p = table;
    FT_UInt   vcnt, hcnt, i, table_size;
 
    OTV_OPTIONAL_TABLE( VCoverage );
    OTV_OPTIONAL_TABLE( HCoverage );
    OTV_OPTIONAL_TABLE( Offset );
 
 
    OTV_NAME_ENTER( "MathVariants" );
 
    OTV_LIMIT_CHECK( 10 );
 
    p += 2;                       /* Skip the MinConnectorOverlap constant */
    OTV_OPTIONAL_OFFSET( VCoverage );
    OTV_OPTIONAL_OFFSET( HCoverage );
    vcnt = FT_NEXT_USHORT( p );
    hcnt = FT_NEXT_USHORT( p );
 
    OTV_LIMIT_CHECK( 2 * vcnt + 2 * hcnt );
    table_size = 10 + 2 * vcnt + 2 * hcnt;
 
    OTV_SIZE_CHECK( VCoverage );
    if ( VCoverage )
      otv_Coverage_validate( table + VCoverage, otvalid, (FT_Int)vcnt );
 
    OTV_SIZE_CHECK( HCoverage );
    if ( HCoverage )
      otv_Coverage_validate( table + HCoverage, otvalid, (FT_Int)hcnt );
 
    for ( i = 0; i < vcnt; i++ )
    {
      OTV_OPTIONAL_OFFSET( Offset );
      OTV_SIZE_CHECK( Offset );
      otv_MathGlyphConstruction_validate( table + Offset, otvalid );
    }
 
    for ( i = 0; i < hcnt; i++ )
    {
      OTV_OPTIONAL_OFFSET( Offset );
      OTV_SIZE_CHECK( Offset );
      otv_MathGlyphConstruction_validate( table + Offset, otvalid );
    }
 
    OTV_EXIT;
  }

Referenced by otv_MATH_validate().