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[gxvalid] Cleanup.

Browse Source 
Some invalid, overrunning, unrecommended non-zero values
are cared in paranoid validation mode only.  There are
many lines looking like:

  if ( valid->root->level >= FT_VALIDATE_PARANOID )
    FT_INVALID_xxx;

To simplify them, GXV_SET_ERR_IF_PARANOID( err ) is
introduced for more paranoid validation in future.

* src/gxvalid/gxvcommn.h (IS_PARANOID_VALIDATION):
New macro to assure valid->root->level is more or
equal to FT_VALIDATE_PARANOID.  (GXV_SET_ERR_IF_PARANOID):
New macro to raise an error if in paranoid validation.
* src/gxvalid/gxvcommn.c: Use GXV_SET_ERR_IF_PARANOID().
* src/gxvalid/gxvfeat.c: Ditto.
* src/gxvalid/gxvjust.c: Ditto.
* src/gxvalid/gxvkern.c: Ditto.
* src/gxvalid/gxvmort.c: Ditto.
* src/gxvalid/gxvmort0.c: Ditto.
* src/gxvalid/gxvmort1.c: Ditto.
* src/gxvalid/gxvmort2.c: Ditto.
* src/gxvalid/gxvmorx1.c: Ditto.
* src/gxvalid/gxvmorx2.c: Ditto.
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suzuki toshiya 14 years ago
parent f6f9b66781
commit 75b91a49aa
12 changed files with 85 additions and 97 deletions
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  1. 29
      ChangeLog
  2. 45
      src/gxvalid/gxvcommn.c
  3. 2
      src/gxvalid/gxvcommn.h
  4. 25
      src/gxvalid/gxvfeat.c
  5. 20
      src/gxvalid/gxvjust.c
  6. 3
      src/gxvalid/gxvkern.c
  7. 9
      src/gxvalid/gxvmort.c
  8. 9
      src/gxvalid/gxvmort0.c
  9. 6
      src/gxvalid/gxvmort1.c
  10. 17
      src/gxvalid/gxvmort2.c
  11. 3
      src/gxvalid/gxvmorx1.c
  12. 14
      src/gxvalid/gxvmorx2.c

29
ChangeLog
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@ -1,3 +1,32 @@
2011-06-14 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[gxvalid] Cleanup.
Some invalid, overrunning, unrecommended non-zero values
are cared in paranoid validation mode only. There are
many lines looking like:
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_xxx;
To simplify them, GXV_SET_ERR_IF_PARANOID( err ) is
introduced for more paranoid validation in future.
* src/gxvalid/gxvcommn.h (IS_PARANOID_VALIDATION):
New macro to assure valid->root->level is more or
equal to FT_VALIDATE_PARANOID. (GXV_SET_ERR_IF_PARANOID):
New macro to raise an error if in paranoid validation.
* src/gxvalid/gxvcommn.c: Use GXV_SET_ERR_IF_PARANOID().
* src/gxvalid/gxvfeat.c: Ditto.
* src/gxvalid/gxvjust.c: Ditto.
* src/gxvalid/gxvkern.c: Ditto.
* src/gxvalid/gxvmort.c: Ditto.
* src/gxvalid/gxvmort0.c: Ditto.
* src/gxvalid/gxvmort1.c: Ditto.
* src/gxvalid/gxvmort2.c: Ditto.
* src/gxvalid/gxvmorx1.c: Ditto.
* src/gxvalid/gxvmorx2.c: Ditto.
2011-06-14 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[gxvalid] Fix gcc4.6 compiler warnings in gxvtrak.c.

45
src/gxvalid/gxvcommn.c
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@ -304,8 +304,7 @@
binSrchHeader->unitSize, binSrchHeader->nUnits,
searchRange, entrySelector, rangeShift ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
}
@ -442,8 +441,7 @@
{
GXV_TRACE(( "too short, glyphs %d - %d are missing\n",
i, valid->face->num_glyphs ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
break;
}
@ -531,8 +529,7 @@
GXV_TRACE(( "reverse ordered segment specification:"
" lastGlyph[%d]=%d < lastGlyph[%d]=%d\n",
unit, lastGlyph, unit - 1 , gid ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
if ( lastGlyph < firstGlyph )
@ -540,8 +537,7 @@
GXV_TRACE(( "reverse ordered range specification at unit %d:",
" lastGlyph %d < firstGlyph %d ",
unit, lastGlyph, firstGlyph ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
if ( valid->root->level == FT_VALIDATE_TIGHT )
continue; /* ftxvalidator silently skips such an entry */
@ -604,8 +600,7 @@
GXV_TRACE(( "reverse ordered segment specification:"
" lastGlyph[%d]=%d < lastGlyph[%d]=%d\n",
unit, lastGlyph, unit - 1 , gid ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
if ( lastGlyph < firstGlyph )
@ -613,8 +608,7 @@
GXV_TRACE(( "reverse ordered range specification at unit %d:",
" lastGlyph %d < firstGlyph %d ",
unit, lastGlyph, firstGlyph ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
if ( valid->root->level == FT_VALIDATE_TIGHT )
continue; /* ftxvalidator silently skips such an entry */
@ -705,8 +699,7 @@
{
GXV_TRACE(( "current gid 0x%04x < previous gid 0x%04x\n",
glyph, prev_glyph ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
prev_glyph = glyph;
@ -834,8 +827,7 @@
{
GXV_TRACE(( " gxv_glyphid_check() gid overflow: num_glyphs %d < %d\n",
face->num_glyphs, gid ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
return 0;
@ -1101,8 +1093,7 @@
if ( ( maxEntry + 1 ) * entrySize > *length_p )
{
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_TOO_SHORT;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_TOO_SHORT );
/* ftxvalidator and FontValidator both warn and continue */
maxEntry = (FT_Byte)( *length_p / entrySize - 1 );
@ -1126,8 +1117,7 @@
{
GXV_TRACE(( " newState offset 0x%04x is out of stateArray\n",
newState ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
continue;
}
@ -1135,8 +1125,7 @@
{
GXV_TRACE(( " newState offset 0x%04x is not aligned to %d-classes\n",
newState, 1 + maxClassID ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
continue;
}
@ -1173,8 +1162,7 @@
break;
default:
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_FORMAT;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_FORMAT );
goto Exit;
}
@ -1503,8 +1491,7 @@
{
GXV_TRACE(( " newState index 0x%04x points out of stateArray\n",
newState_idx ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
state = (FT_UShort)( newState_idx / ( 1 + maxClassID ) );
@ -1513,8 +1500,7 @@
FT_TRACE4(( "-> new state = %d (supposed)\n"
"but newState index 0x%04x is not aligned to %d-classes\n",
state, newState_idx, 1 + maxClassID ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
switch ( GXV_GLYPHOFFSET_FMT( xstatetable ) )
@ -1548,8 +1534,7 @@
break;
default:
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_FORMAT;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_FORMAT );
goto Exit;
}

2
src/gxvalid/gxvcommn.h
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@ -61,6 +61,8 @@ FT_BEGIN_HEADER
#undef GXV_LOAD_UNUSED_VARS /* debug purpose */
#define IS_PARANOID_VALIDATION ( valid->root->level >= FT_VALIDATE_PARANOID )
#define GXV_SET_ERR_IF_PARANOID( err ) { if ( IS_PARANOID_VALIDATION ) ( err ); }
/*************************************************************************/
/*************************************************************************/

25
src/gxvalid/gxvfeat.c
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@ -92,8 +92,7 @@
{
GXV_TRACE(( "feature number %d is out of range %d\n",
feature, gxv_feat_registry_length ));
if ( valid->root->level == FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
goto Exit;
}
@ -101,8 +100,7 @@
{
GXV_TRACE(( "feature number %d is in defined range but doesn't exist\n",
feature ));
if ( valid->root->level == FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
goto Exit;
}
@ -222,9 +220,8 @@
if ( settingTable < reserved_size )
FT_INVALID_OFFSET;
if ( valid->root->level == FT_VALIDATE_PARANOID &&
( featureFlags & GXV_FEAT_MASK_UNUSED ) == 0 )
FT_INVALID_DATA;
if ( ( featureFlags & GXV_FEAT_MASK_UNUSED ) == 0 )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
exclusive = FT_BOOL( featureFlags & GXV_FEAT_MASK_EXCLUSIVE_SETTINGS );
if ( exclusive )
@ -252,9 +249,8 @@
{
gxv_feat_setting_validate( p, limit, exclusive, valid );
if ( valid->root->level == FT_VALIDATE_PARANOID &&
(FT_Int)GXV_FEAT_DATA( setting ) <= last_setting )
FT_INVALID_FORMAT;
if ( (FT_Int)GXV_FEAT_DATA( setting ) <= last_setting )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_FORMAT );
last_setting = (FT_Int)GXV_FEAT_DATA( setting );
/* setting + nameIndex */
@ -312,8 +308,8 @@
featureNameCount = FT_NEXT_USHORT( p );
GXV_TRACE(( " (featureNameCount = %d)\n", featureNameCount ));
if ( valid->root->level != FT_VALIDATE_PARANOID )
p += 6; /* skip (none) and (none) */
if ( !( IS_PARANOID_VALIDATION ) )
p += 6; /* skip (none) and (none) */
else
{
if ( FT_NEXT_USHORT( p ) != 0 )
@ -329,9 +325,8 @@
{
gxv_feat_name_validate( p, limit, valid );
if ( valid->root->level == FT_VALIDATE_PARANOID &&
(FT_Int)GXV_FEAT_DATA( feature ) <= last_feature )
FT_INVALID_FORMAT;
if ( (FT_Int)GXV_FEAT_DATA( feature ) <= last_feature )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_FORMAT );
last_feature = GXV_FEAT_DATA( feature );
p += 2 + 2 + 4 + 2 + 2;

20
src/gxvalid/gxvjust.c
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@ -77,8 +77,7 @@
GXV_TRACE(( "just table includes too large %s"
" GID=%d > %d (in maxp)\n",
msg_tag, gid, valid->face->num_glyphs ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
@ -113,13 +112,12 @@
#endif
/* According to Apple spec, only 7bits in justClass is used */
if ( valid->root->level >= FT_VALIDATE_PARANOID &&
( justClass & 0xFFFFFF80 ) != 0 )
if ( ( justClass & 0xFFFFFF80 ) != 0 )
{
GXV_TRACE(( "just table includes non-zero value"
" in unused justClass higher bits"
" of WidthDeltaPair" ));
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
valid->subtable_length = p - table;
@ -202,12 +200,11 @@
#endif
decomposedCount = FT_NEXT_USHORT( p );
if ( valid->root->level >= FT_VALIDATE_PARANOID &&
lowerLimit >= upperLimit )
if ( lowerLimit >= upperLimit )
{
GXV_TRACE(( "just table includes invalid range spec:"
" lowerLimit(%d) > upperLimit(%d)\n" ));
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
for ( i = 0; i < decomposedCount; i++ )
@ -303,7 +300,7 @@
else if ( noStretchValue > maximumLimit )
GXV_TRACE(( "type4:noStretchValue 0x%08x > maximumLimit 0x%08x\n",
noStretchValue, maximumLimit ));
else if ( valid->root->level < FT_VALIDATE_PARANOID )
else if ( !IS_PARANOID_VALIDATION )
return;
FT_INVALID_DATA;
@ -353,9 +350,8 @@
actionLength = FT_NEXT_ULONG( p );
/* actionClass is related with justClass using 7bit only */
if ( valid->root->level >= FT_VALIDATE_PARANOID &&
( actionClass & 0xFF80 ) != 0 )
FT_INVALID_DATA;
if ( ( actionClass & 0xFF80 ) != 0 )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
if ( actionType == 0 )
gxv_just_actSubrecord_type0_validate( p, limit, valid );

3
src/gxvalid/gxvkern.c
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@ -491,8 +491,7 @@
{
GXV_TRACE(( "maxGID=%d, but glyphCount=%d\n",
valid->face->num_glyphs, glyphCount ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
if ( flags != 0 )

9
src/gxvalid/gxvmort.c
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@ -47,16 +47,14 @@
GXV_TRACE(( "featureType %d is out of registered range, "
"setting %d is unchecked\n",
f->featureType, f->featureSetting ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
else if ( !gxv_feat_registry[f->featureType].existence )
{
GXV_TRACE(( "featureType %d is within registered area "
"but undefined, setting %d is unchecked\n",
f->featureType, f->featureSetting ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
else
{
@ -74,8 +72,7 @@
if ( f->featureSetting > nSettings_max )
{
GXV_TRACE(( "out of defined range %d", nSettings_max ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
GXV_TRACE(( "\n" ));
}

9
src/gxvalid/gxvmort0.c
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@ -102,23 +102,20 @@
{
GXV_TRACE(( " [odd] a glyph is marked as the first and last"
" in Indic rearrangement\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
if ( markFirst > 0 && dontAdvance > 0 )
{
GXV_TRACE(( " [odd] the first glyph is marked as dontAdvance"
" in Indic rearrangement\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
if ( 0 < reserved )
{
GXV_TRACE(( " non-zero bits found in reserved range\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
else
GXV_TRACE(( "\n" ));

6
src/gxvalid/gxvmort1.c
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@ -163,8 +163,7 @@
if ( 0 < reserved )
{
GXV_TRACE(( " non-zero bits found in reserved range\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
gxv_mort_subtable_type1_offset_to_subst_validate( markOffset,
@ -208,8 +207,7 @@
GXV_TRACE(( "substTable include a strange gid[%d]=%d >"
" out of define range (%d..%d)\n",
i, dst_gid, valid->min_gid, valid->max_gid ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
}

17
src/gxvalid/gxvmort2.c
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@ -155,8 +155,7 @@
ligActionOffset, lat_base - p ));
/* FontValidator, ftxvalidator, ftxdumperfuser warn but continue */
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
else if ( lat_limit < p )
{
@ -164,8 +163,7 @@
ligActionOffset, p - lat_limit ));
/* FontValidator, ftxvalidator, ftxdumperfuser warn but continue */
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
else
{
@ -192,8 +190,7 @@
" 2 x offset < ligatureTable (%d byte rewind)\n",
offset, optdata->ligatureTable - offset * 2 ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
} else if ( offset * 2 >
optdata->ligatureTable + optdata->ligatureTable_length )
{
@ -204,8 +201,7 @@
optdata->ligatureTable + optdata->ligatureTable_length
- offset * 2 ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
}
}
@ -268,9 +264,8 @@
GXV_LIMIT_CHECK( 2 );
lig_gid = FT_NEXT_USHORT( p );
if ( valid->root->level >= FT_VALIDATE_PARANOID &&
valid->face->num_glyphs < lig_gid )
FT_INVALID_GLYPH_ID;
if ( valid->face->num_glyphs < lig_gid )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
}
GXV_EXIT;

3
src/gxvalid/gxvmorx1.c
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@ -140,8 +140,7 @@
if ( 0 < reserved )
{
GXV_TRACE(( " non-zero bits found in reserved range\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
GXV_TRACE(( "markIndex = %d, currentIndex = %d\n",

14
src/gxvalid/gxvmorx2.c
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@ -194,8 +194,7 @@
" too negative offset moving all GID"
" below defined range: 0x%04x\n",
offset & 0xFFFFU ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
else if ( ( offset & 0x3FFF0000UL ) == 0x0000000UL )
{
@ -206,15 +205,13 @@
" too large offset moving all GID"
" over defined range: 0x%04x\n",
offset & 0xFFFFU ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
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 ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_OFFSET;
GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
}
}
@ -282,9 +279,8 @@
GXV_LIMIT_CHECK( 2 );
lig_gid = FT_NEXT_USHORT( p );
if ( valid->root->level >= FT_VALIDATE_PARANOID &&
lig_gid < valid->face->num_glyphs )
FT_INVALID_GLYPH_ID;
if ( lig_gid < valid->face->num_glyphs )
GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
}
}

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