Update from HarfBuzz. Lars Knoll fixed all the warnings.

2006-04-06  Behdad Esfahbod  <behdad@gnome.org>

        * pango/opentype: Update from HarfBuzz.  Lars Knoll fixed all the
        warnings.

4 files changed, 179 insertions, 113 deletions

diff --git a/pango/opentype/harfbuzz-dump.c b/pango/opentype/harfbuzz-dump.c
index 0500ff5e..bf30f66b 100644
--- a/pango/opentype/harfbuzz-dump.c
+++ b/pango/opentype/harfbuzz-dump.c
@@ -48,23 +48,23 @@ do_indent (FILE *stream, int indent)
   fprintf (stream, "%*s", indent * 3, "");
 }
 
-static void 
-dump (FILE *stream, int indent, const char *format, ...) 
+static void
+dump (FILE *stream, int indent, const char *format, ...)
 {
   va_list list;
-  
+
   do_indent (stream, indent);
-  
+
   va_start (list, format);
   vfprintf (stream, format, list);
   va_end (list);
 }
 
-static void 
-Dump_UShort_Array (FT_UShort *array, int count, const char *name, FILE *stream, int indent) 
+static void
+Dump_UShort_Array (FT_UShort *array, int count, const char *name, FILE *stream, int indent)
 {
   int i;
-  
+
   do_indent (stream, indent);
 
   fprintf (stream, "<%s>", name);
@@ -73,10 +73,10 @@ Dump_UShort_Array (FT_UShort *array, int count, const char *name, FILE *stream,
   fprintf (stream, "</%s>\n", name);
 }
 
-static void 
+static void
 Print_Tag (FT_ULong tag, FILE *stream)
 {
-  fprintf (stream, "%c%c%c%c", 
+  fprintf (stream, "%c%c%c%c",
 	   (unsigned char)(tag >> 24),
 	   (unsigned char)((tag >> 16) & 0xff),
 	   (unsigned char)((tag >> 8) & 0xff),
@@ -87,6 +87,8 @@ DEF_DUMP (LangSys)
 {
   int i;
 
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (LangSys, LookupOrderOffset);
   DUMP_FUINT (LangSys, ReqFeatureIndex);
   DUMP_FUINT (LangSys, FeatureCount);
@@ -116,11 +118,11 @@ DEF_DUMP (Script)
 DEF_DUMP (ScriptList)
 {
   int i;
-  
+
   DUMP_FUINT (ScriptList, ScriptCount);
 
   for (i=0; i < ScriptList->ScriptCount; i++)
-    { 
+    {
       do_indent (stream, indent);
       fprintf (stream, "<ScriptTag>");
       Print_Tag (ScriptList->ScriptRecord[i].ScriptTag, stream);
@@ -132,7 +134,9 @@ DEF_DUMP (ScriptList)
 DEF_DUMP (Feature)
 {
   int i;
-  
+
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (Feature, FeatureParams);
   DUMP_FUINT (Feature, LookupListCount);
 
@@ -142,6 +146,8 @@ DEF_DUMP (Feature)
 
 DEF_DUMP (MarkRecord)
 {
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (MarkRecord, Class);
   DUMP1("<Anchor>%d</Anchor>\n", MarkRecord->MarkAnchor.PosFormat );
 }
@@ -159,11 +165,11 @@ DEF_DUMP (MarkArray)
 DEF_DUMP (FeatureList)
 {
   int i;
-  
+
   DUMP_FUINT (FeatureList, FeatureCount);
 
   for (i=0; i < FeatureList->FeatureCount; i++)
-    { 
+    {
       do_indent (stream, indent);
       fprintf (stream, "<FeatureTag>");
       Print_Tag (FeatureList->FeatureRecord[i].FeatureTag, stream);
@@ -174,6 +180,8 @@ DEF_DUMP (FeatureList)
 
 DEF_DUMP (Coverage)
 {
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (Coverage, CoverageFormat);
 
   if (Coverage->CoverageFormat == 1)
@@ -189,7 +197,7 @@ DEF_DUMP (Coverage)
     {
       int i;
       DUMP_FUINT (&Coverage->cf.cf2, RangeCount);
-      
+
       for ( i = 0; i < Coverage->cf.cf2.RangeCount; i++ )
 	  DUMP3("<Glyph>%#06x - %#06x</Glyph> <!-- %d -->\n",
 	        Coverage->cf.cf2.RangeRecord[i].Start,
@@ -199,13 +207,17 @@ DEF_DUMP (Coverage)
 
 DEF_DUMP (ClassRangeRecord)
 {
+  FT_UNUSED(hb_type);
+
   DUMP_FGLYPH (ClassRangeRecord, Start);
   DUMP_FGLYPH (ClassRangeRecord, End);
   DUMP_FUINT (ClassRangeRecord, Class);
 }
-     
+
 DEF_DUMP (ClassDefinition)
 {
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT( ClassDefinition, ClassFormat);
   DUMP_FUINT( ClassDefinition, loaded);
 
@@ -225,7 +237,7 @@ DEF_DUMP (ClassDefinition)
       int i;
       HB_ClassDefFormat2 *ClassDefFormat2 = &ClassDefinition->cd.cd2;
       DUMP_FUINT (ClassDefFormat2, ClassRangeCount);
-      
+
       for (i = 0; i < ClassDefFormat2->ClassRangeCount; i++)
 	RECURSE_NUM (ClassRangeRecord, i, ClassRangeRecord, &ClassDefFormat2->ClassRangeRecord[i]);
     }
@@ -235,6 +247,8 @@ DEF_DUMP (ClassDefinition)
 
 DEF_DUMP (SubstLookupRecord)
 {
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (SubstLookupRecord, SequenceIndex);
   DUMP_FUINT (SubstLookupRecord, LookupListIndex);
 }
@@ -246,7 +260,7 @@ DEF_DUMP (ChainSubClassRule)
   DUMP_USHORT_ARRAY (ChainSubClassRule, Backtrack, ChainSubClassRule->BacktrackGlyphCount);
   DUMP_USHORT_ARRAY (ChainSubClassRule, Input, ChainSubClassRule->InputGlyphCount - 1);
   DUMP_USHORT_ARRAY (ChainSubClassRule, Lookahead, ChainSubClassRule->LookaheadGlyphCount);
-  
+
   for (i = 0; i < ChainSubClassRule->SubstCount; i++)
     RECURSE_NUM (SubstLookupRecord, i, SubstLookupRecord, &ChainSubClassRule->SubstLookupRecord[i]);
 
@@ -256,7 +270,7 @@ DEF_DUMP (ChainSubClassRule)
 DEF_DUMP (ChainSubClassSet)
 {
   int i;
-  
+
   DUMP_FUINT( ChainSubClassSet, ChainSubClassRuleCount );
   for (i = 0; i < ChainSubClassSet->ChainSubClassRuleCount; i++)
     RECURSE_NUM (ChainSubClassRule, i, ChainSubClassRule, &ChainSubClassSet->ChainSubClassRule[i]);
@@ -277,7 +291,7 @@ Dump_GSUB_Lookup_Single (HB_SubTable *subtable, FILE *stream, int indent, HB_Typ
   else
     {
       int i;
-      
+
       DUMP_FINT (&SingleSubst->ssf.ssf2, GlyphCount);
       for (i=0; i < SingleSubst->ssf.ssf2.GlyphCount; i++)
 	DUMP2("<Substitute>%#06x</Substitute> <!-- %d -->\n", SingleSubst->ssf.ssf2.Substitute[i], i);
@@ -287,7 +301,9 @@ Dump_GSUB_Lookup_Single (HB_SubTable *subtable, FILE *stream, int indent, HB_Typ
 DEF_DUMP (Ligature)
 {
   int i;
-  
+
+  FT_UNUSED(hb_type);
+
   DUMP_FGLYPH (Ligature, LigGlyph);
   DUMP_FUINT (Ligature, ComponentCount);
 
@@ -298,7 +314,7 @@ DEF_DUMP (Ligature)
 DEF_DUMP (LigatureSet)
 {
   int i;
-  
+
   DUMP_FUINT (LigatureSet, LigatureCount);
 
   for (i=0; i < LigatureSet->LigatureCount; i++)
@@ -322,6 +338,10 @@ Dump_GSUB_Lookup_Ligature (HB_SubTable *subtable, FILE *stream, int indent, HB_T
 
 DEF_DUMP (ContextSubstFormat1)
 {
+  FT_UNUSED(hb_type);
+  FT_UNUSED(ContextSubstFormat1);
+
+
   DUMP("<!-- Not implemented!!! -->\n");
 }
 
@@ -334,6 +354,9 @@ DEF_DUMP (ContextSubstFormat2)
 
 DEF_DUMP (ContextSubstFormat3)
 {
+  FT_UNUSED(hb_type);
+  FT_UNUSED(ContextSubstFormat3);
+
   DUMP("<!-- Not implemented!!! -->\n");
 }
 
@@ -361,13 +384,16 @@ Dump_GSUB_Lookup_Context (HB_SubTable *subtable, FILE *stream, int indent, HB_Ty
 
 DEF_DUMP (ChainContextSubstFormat1)
 {
+  FT_UNUSED(hb_type);
+  FT_UNUSED(ChainContextSubstFormat1);
+
   DUMP("<!-- Not implemented!!! -->\n");
 }
 
 DEF_DUMP (ChainContextSubstFormat2)
 {
   int i;
-  
+
   RECURSE (Coverage, Coverage, &ChainContextSubstFormat2->Coverage);
   DUMP_FUINT (ChainContextSubstFormat2, MaxBacktrackLength);
   RECURSE (ClassDefinition, ClassDefinition, &ChainContextSubstFormat2->BacktrackClassDef);
@@ -375,7 +401,7 @@ DEF_DUMP (ChainContextSubstFormat2)
   RECURSE (ClassDefinition, ClassDefinition, &ChainContextSubstFormat2->InputClassDef);
   DUMP_FUINT (ChainContextSubstFormat2, MaxLookaheadLength);
   RECURSE (ClassDefinition, ClassDefinition, &ChainContextSubstFormat2->LookaheadClassDef);
-  
+
   DUMP_FUINT (ChainContextSubstFormat2, ChainSubClassSetCount);
   for (i = 0; i < ChainContextSubstFormat2->ChainSubClassSetCount; i++)
     RECURSE (ChainSubClassSet, ChainSubClassSet, &ChainContextSubstFormat2->ChainSubClassSet[i]);
@@ -384,7 +410,7 @@ DEF_DUMP (ChainContextSubstFormat2)
 DEF_DUMP (ChainContextSubstFormat3)
 {
   int i;
-  
+
   DUMP_FUINT (ChainContextSubstFormat3, BacktrackGlyphCount);
   for (i = 0; i < ChainContextSubstFormat3->BacktrackGlyphCount; i++)
     RECURSE (BacktrackCoverage, Coverage, &ChainContextSubstFormat3->BacktrackCoverage[i]);
@@ -404,7 +430,7 @@ static void
 Dump_GSUB_Lookup_Chain (HB_SubTable *subtable, FILE *stream, int indent, HB_Type hb_type)
 {
   HB_ChainContextSubst *chain = &subtable->st.gsub.chain;
-  
+
   DUMP_FUINT (chain, SubstFormat);
   switch (chain->SubstFormat)
     {
@@ -429,7 +455,9 @@ Dump_Device (HB_Device *Device, FILE *stream, int indent, HB_Type hb_type)
   int bits = 0;
   int n_per;
   unsigned int mask;
-  
+
+  FT_UNUSED(hb_type);
+
   DUMP_FUINT (Device, StartSize);
   DUMP_FUINT (Device, EndSize);
   DUMP_FUINT (Device, DeltaFormat);
@@ -469,7 +497,7 @@ Dump_Device (HB_Device *Device, FILE *stream, int indent, HB_Type hb_type)
     }
   DUMP ("</DeltaValue>\n");
 }
-     
+
 static void
 Dump_ValueRecord (HB_ValueRecord *ValueRecord, FILE *stream, int indent, HB_Type hb_type, FT_UShort value_format)
 {
@@ -516,7 +544,7 @@ Dump_GPOS_Lookup_Single (HB_SubTable *subtable, FILE *stream, int indent, HB_Typ
   else
     {
       int i;
-      
+
       DUMP_FUINT (&SinglePos->spf.spf2, ValueCount);
       for (i = 0; i < SinglePos->spf.spf2.ValueCount; i++)
 	DUMP_VALUE_RECORD (&SinglePos->spf.spf2.Value[i], SinglePos->ValueFormat);
@@ -578,16 +606,16 @@ Dump_GPOS_Lookup_Markbase (HB_SubTable *subtable, FILE *stream, int indent, HB_T
 {
   int i;
   HB_MarkBasePos *markbase = &subtable->st.gpos.markbase;
-  
+
   DUMP_FUINT (markbase, PosFormat);
   RECURSE (Coverage, Coverage, &markbase->MarkCoverage);
   RECURSE (Coverage, Coverage, &markbase->BaseCoverage);
   DUMP_FUINT (markbase, ClassCount);
   RECURSE (MarkArray, MarkArray, &markbase->MarkArray);
-  
+
   DUMP ("<BaseArray>\n");
   indent++;
-  
+
   DUMP_FUINT (&markbase->BaseArray, BaseCount);
   for (i = 0; i < markbase->BaseArray.BaseCount; i++)
     {
@@ -598,7 +626,7 @@ Dump_GPOS_Lookup_Markbase (HB_SubTable *subtable, FILE *stream, int indent, HB_T
 	DUMP1 ("  <Anchor>%d</Anchor>\n", r->BaseAnchor->PosFormat);
       DUMP ("<BaseRecord>\n");
     }
-  
+
   indent--;
   DUMP ("</BaseArray>\n");
 }
diff --git a/pango/opentype/harfbuzz-gpos.c b/pango/opentype/harfbuzz-gpos.c
index e75e1cc6..d668749e 100644
--- a/pango/opentype/harfbuzz-gpos.c
+++ b/pango/opentype/harfbuzz-gpos.c
@@ -48,6 +48,10 @@ static FT_Error  default_mmfunc( FT_Face      face,
 				 FT_Pos*      metric_value,
 				 void*        data )
 {
+  FT_UNUSED(face);
+  FT_UNUSED(metric_id);
+  FT_UNUSED(metric_value);
+  FT_UNUSED(data);
   return HB_Err_No_MM_Interpreter;
 }
 
@@ -184,7 +188,7 @@ Fail4:
 FT_Error  HB_Done_GPOS_Table( HB_GPOSHeader* gpos )
 {
   FT_Memory memory = gpos->memory;
-  
+
   _HB_OPEN_Free_LookupList( &gpos->LookupList, HB_Type_GPOS, memory );
   _HB_OPEN_Free_FeatureList( &gpos->FeatureList, memory );
   _HB_OPEN_Free_ScriptList( &gpos->ScriptList, memory );
@@ -212,7 +216,7 @@ static FT_Error  Load_ValueRecord( HB_ValueRecord*  vr,
 {
   FT_Error  error;
   FT_Memory memory = stream->memory;
-  
+
   FT_ULong cur_offset, new_offset;
 
 
@@ -745,10 +749,10 @@ static FT_Error  Get_Anchor( GPOS_Instance*   gpi,
 	return error;
 
       if ( gpi->face->glyph->format != ft_glyph_format_outline )
-	return HB_Err_Invalid_GPOS_SubTable;	  
+	return HB_Err_Invalid_GPOS_SubTable;
 
       ap = an->af.af2.AnchorPoint;
-      
+
       outline = gpi->face->glyph->outline;
 
       /* if outline.n_points is set to zero by gfunc(), we use the
@@ -824,7 +828,7 @@ static FT_Error  Load_MarkArray ( HB_MarkArray*  ma,
     return error;
 
   count = ma->MarkCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   ma->MarkRecord = NULL;
@@ -1013,6 +1017,12 @@ static FT_Error  Lookup_DefaultPos(  GPOS_Instance*    gpi,
 				     FT_UShort         context_length,
 				     int               nesting_level )
 {
+  FT_UNUSED(gpi);
+  FT_UNUSED(st);
+  FT_UNUSED(buffer);
+  FT_UNUSED(flags);
+  FT_UNUSED(context_length);
+  FT_UNUSED(nesting_level);
   return HB_Err_Not_Covered;
 }
 
@@ -1028,6 +1038,7 @@ static FT_Error  Lookup_SinglePos( GPOS_Instance*    gpi,
   HB_GPOSHeader*  gpos = gpi->gpos;
   HB_SinglePos*   sp = &st->single;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -1091,7 +1102,7 @@ static FT_Error  Load_PairSet ( HB_PairSet*  ps,
     return error;
 
   count = ps->PairValueCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   ps->PairValueRecord = NULL;
@@ -1333,7 +1344,7 @@ static FT_Error  Load_PairPos2( HB_PairPosFormat2*  ppf2,
 	if ( error )
 	{
 	  if ( format1 )
-	    Free_ValueRecord( &c2r[n].Value1, format1, memory );	      
+	    Free_ValueRecord( &c2r[n].Value1, format1, memory );
 	  goto Fail0;
 	}
       }
@@ -1591,6 +1602,7 @@ static FT_Error  Lookup_PairPos( GPOS_Instance*    gpi,
   HB_GPOSHeader*  gpos = gpi->gpos;
   HB_PairPos*     pp = &st->pair;
 
+  FT_UNUSED(nesting_level);
 
   if ( buffer->in_pos >= buffer->in_length - 1 )
     return HB_Err_Not_Covered;           /* Not enough glyphs in stream */
@@ -1697,7 +1709,7 @@ static FT_Error  Load_CursivePos( HB_GPOS_SubTable* st,
   for ( n = 0; n < count; n++ )
   {
     FT_ULong entry_offset;
-    
+
     if ( ACCESS_Frame( 2L ) )
       return error;
 
@@ -1805,6 +1817,7 @@ static FT_Error  Lookup_CursivePos( GPOS_Instance*    gpi,
   FT_Pos                entry_x, entry_y;
   FT_Pos                exit_x, exit_y;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
   {
@@ -2035,7 +2048,7 @@ static FT_Error  Load_BaseArray( HB_BaseArray*  ba,
     return error;
 
   count = ba->BaseCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   ba->BaseRecord = NULL;
@@ -2089,7 +2102,7 @@ Fail:
   for ( k = 0; k < m; k++ )
   {
     ban = br[k].BaseAnchor;
-    
+
     for ( n = 0; n < num_classes; n++ )
       Free_Anchor( &ban[n], memory );
 
@@ -2249,6 +2262,7 @@ static FT_Error  Lookup_MarkBasePos( GPOS_Instance*    gpi,
 
   HB_Position     o;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -2367,7 +2381,7 @@ static FT_Error  Load_LigatureAttach( HB_LigatureAttach*  lat,
     return error;
 
   count = lat->ComponentCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   lat->ComponentRecord = NULL;
@@ -2422,7 +2436,7 @@ Fail:
   for ( k = 0; k < m; k++ )
   {
     lan = cr[k].LigatureAnchor;
-    
+
     for ( n = 0; n < num_classes; n++ )
       Free_Anchor( &lan[n], memory );
 
@@ -2664,6 +2678,7 @@ static FT_Error  Lookup_MarkLigPos( GPOS_Instance*    gpi,
 
   HB_Position    o;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -2798,7 +2813,7 @@ static FT_Error  Load_Mark2Array( HB_Mark2Array*  m2a,
     return error;
 
   count = m2a->Mark2Count = GET_UShort();
-  
+
   FORGET_Frame();
 
   m2a->Mark2Record = NULL;
@@ -2846,7 +2861,7 @@ Fail:
   for ( k = 0; k < m; k++ )
   {
     m2an = m2r[k].Mark2Anchor;
-    
+
     for ( n = 0; n < num_classes; n++ )
       Free_Anchor( &m2an[n], memory );
 
@@ -3006,6 +3021,7 @@ static FT_Error  Lookup_MarkMarkPos( GPOS_Instance*    gpi,
 
   HB_Position    o;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -3897,7 +3913,7 @@ static FT_Error  Lookup_ContextPos1( GPOS_Instance*          gpi,
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + pr[k].GlyphCount - i == buffer->in_length )
+	if ( j + pr[k].GlyphCount - i == (FT_Long)buffer->in_length )
 	  goto next_posrule;
 	j++;
       }
@@ -3910,7 +3926,7 @@ static FT_Error  Lookup_ContextPos1( GPOS_Instance*          gpi,
 			  pr[k].PosCount, pr[k].PosLookupRecord,
 			  buffer,
 			  nesting_level );
-    
+
     next_posrule:
       ;
   }
@@ -3990,7 +4006,7 @@ static FT_Error  Lookup_ContextPos2( GPOS_Instance*          gpi,
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End;
 
-	if ( j + pr->GlyphCount - i == buffer->in_length )
+	if ( j + pr->GlyphCount - i == (FT_Long)buffer->in_length )
 	  goto next_posclassrule;
 	j++;
       }
@@ -4062,7 +4078,7 @@ static FT_Error  Lookup_ContextPos3( GPOS_Instance*          gpi,
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + cpf3->GlyphCount - i == buffer->in_length )
+      if ( j + cpf3->GlyphCount - i == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -5215,7 +5231,7 @@ static FT_Error  Lookup_ChainContextPos1(
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + igc - i + lgc == buffer->in_length )
+	if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	  goto next_chainposrule;
 	j++;
       }
@@ -5234,7 +5250,7 @@ static FT_Error  Lookup_ChainContextPos1(
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + lgc - i == buffer->in_length )
+	if ( j + lgc - i == (FT_Long)buffer->in_length )
 	  goto next_chainposrule;
 	j++;
       }
@@ -5387,7 +5403,7 @@ static FT_Error  Lookup_ChainContextPos2(
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End1;
 
-	if ( j + igc - i + lgc == buffer->in_length )
+	if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	  goto next_chainposclassrule;
 	j++;
       }
@@ -5417,7 +5433,7 @@ static FT_Error  Lookup_ChainContextPos2(
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End1;
 
-	if ( j + lgc - i == buffer->in_length )
+	if ( j + lgc - i == (FT_Long)buffer->in_length )
 	  goto next_chainposclassrule;
 	j++;
       }
@@ -5531,7 +5547,7 @@ static FT_Error  Lookup_ChainContextPos3(
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + igc - i + lgc == buffer->in_length )
+      if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -5553,7 +5569,7 @@ static FT_Error  Lookup_ChainContextPos3(
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + lgc - i == buffer->in_length )
+      if ( j + lgc - i == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -5968,6 +5984,8 @@ static FT_Error  GPOS_Do_Glyph_Lookup( GPOS_Instance*    gpi,
 static FT_Error  Load_DefaultPos( HB_GPOS_SubTable* st,
 				  FT_Stream         stream )
 {
+  FT_UNUSED(st);
+  FT_UNUSED(stream);
   return HB_Err_Invalid_GPOS_SubTable_Format;
 }
 
@@ -6004,6 +6022,8 @@ FT_Error  _HB_GPOS_Load_SubTable( HB_GPOS_SubTable*  st,
 static void  Free_DefaultPos( HB_GPOS_SubTable* st,
 			      FT_Memory         memory )
 {
+  FT_UNUSED(st);
+  FT_UNUSED(memory);
 }
 
 typedef void (*Free_Pos_Func_Type)( HB_GPOS_SubTable* st,
@@ -6103,7 +6123,7 @@ static FT_Error  Position_CursiveChain ( HB_Buffer     buffer )
     if (positions[j].cursive_chain > 0)
       positions[j].y_pos += positions[j - positions[j].cursive_chain].y_pos;
   }
-  
+
   /* Then handle all right-to-left connections */
   for (i = buffer->in_length; i > 0; i--)
   {
@@ -6112,7 +6132,7 @@ static FT_Error  Position_CursiveChain ( HB_Buffer     buffer )
     if (positions[j].cursive_chain < 0)
       positions[j].y_pos += positions[j - positions[j].cursive_chain].y_pos;
   }
-  
+
   return FT_Err_Ok;
 }
 
@@ -6129,7 +6149,7 @@ FT_Error  HB_GPOS_Add_Feature( HB_GPOSHeader*  gpos,
   FT_UShort    lookup_count;
 
   /* Each feature can only be added once */
-  
+
   if ( !gpos ||
        feature_index >= gpos->FeatureList.FeatureCount ||
        gpos->FeatureList.ApplyCount == gpos->FeatureList.FeatureCount )
@@ -6228,11 +6248,11 @@ FT_Error  HB_GPOS_Apply_String( FT_Face            face,
   gpi.load_flags = load_flags;
   gpi.r2l        = r2l;
   gpi.dvi        = dvi;
-  
+
   lookup_count = gpos->LookupList.LookupCount;
 
   for ( i = 0; i < gpos->FeatureList.ApplyCount; i++ )
-  { 
+  {
     /* index of i'th feature */
     feature_index = gpos->FeatureList.ApplyOrder[i];
     feature = gpos->FeatureList.FeatureRecord[feature_index].Feature;
@@ -6255,7 +6275,7 @@ FT_Error  HB_GPOS_Apply_String( FT_Face            face,
 	retError = error;
     }
   }
-  
+
   error = Position_CursiveChain ( buffer );
   if ( error )
     return error;
diff --git a/pango/opentype/harfbuzz-gsub.c b/pango/opentype/harfbuzz-gsub.c
index 7610e1e2..1d91a117 100644
--- a/pango/opentype/harfbuzz-gsub.c
+++ b/pango/opentype/harfbuzz-gsub.c
@@ -155,7 +155,7 @@ Fail4:
 FT_Error   HB_Done_GSUB_Table( HB_GSUBHeader* gsub )
 {
   FT_Memory memory = gsub->memory;
-  
+
   _HB_OPEN_Free_LookupList( &gsub->LookupList, HB_Type_GSUB, memory );
   _HB_OPEN_Free_FeatureList( &gsub->FeatureList, memory );
   _HB_OPEN_Free_ScriptList( &gsub->ScriptList, memory );
@@ -176,6 +176,12 @@ static FT_Error  Lookup_DefaultSubst( HB_GSUBHeader*    gsub,
 				      FT_UShort          context_length,
 				      int                nesting_level )
 {
+  FT_UNUSED(gsub);
+  FT_UNUSED(st);
+  FT_UNUSED(buffer);
+  FT_UNUSED(flags);
+  FT_UNUSED(context_length);
+  FT_UNUSED(nesting_level);
   return HB_Err_Not_Covered;
 }
 
@@ -297,6 +303,8 @@ static FT_Error  Lookup_SingleSubst( HB_GSUBHeader*   gsub,
   HB_SingleSubst*  ss = &st->single;
   HB_GDEFHeader*   gdef = gsub->gdef;
 
+  FT_UNUSED(nesting_level);
+
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -506,6 +514,7 @@ static FT_Error  Lookup_MultipleSubst( HB_GSUBHeader*    gsub,
   HB_MultipleSubst*  ms = &st->multiple;
   HB_GDEFHeader*     gdef = gsub->gdef;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -705,10 +714,9 @@ static FT_Error  Lookup_AlternateSubst( HB_GSUBHeader*    gsub,
   FT_UShort         index, alt_index, property;
   HB_AlternateSubst* as = &st->alternate;
   HB_GDEFHeader*     gdef = gsub->gdef;
-
-
   HB_AlternateSet  aset;
 
+  FT_UNUSED(nesting_level);
 
   if ( context_length != 0xFFFF && context_length < 1 )
     return HB_Err_Not_Covered;
@@ -995,6 +1003,7 @@ static FT_Error  Lookup_LigatureSubst( HB_GSUBHeader*    gsub,
 
   HB_Ligature*  lig;
 
+  FT_UNUSED(nesting_level);
 
   if ( CHECK_Property( gdef, IN_CURITEM(), flags, &property ) )
     return error;
@@ -1032,7 +1041,7 @@ static FT_Error  Lookup_LigatureSubst( HB_GSUBHeader*    gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + lig->ComponentCount - i == buffer->in_length )
+	if ( j + lig->ComponentCount - i == (FT_Long)buffer->in_length )
 	  goto next_ligature;
 	j++;
       }
@@ -1924,7 +1933,7 @@ static FT_Error  Lookup_ContextSubst1( HB_GSUBHeader*          gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + sr[k].GlyphCount - i == buffer->in_length )
+	if ( j + sr[k].GlyphCount - i == (FT_Long)buffer->in_length )
 	  goto next_subrule;
 	j++;
       }
@@ -2015,7 +2024,7 @@ static FT_Error  Lookup_ContextSubst2( HB_GSUBHeader*          gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End;
 
-	if ( j + sr->GlyphCount - i < buffer->in_length )
+	if ( j + sr->GlyphCount - i < (FT_Long)buffer->in_length )
 	  goto next_subclassrule;
 	j++;
       }
@@ -2086,7 +2095,7 @@ static FT_Error  Lookup_ContextSubst3( HB_GSUBHeader*          gsub,
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + csf3->GlyphCount - i == buffer->in_length )
+      if ( j + csf3->GlyphCount - i == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -2786,7 +2795,7 @@ static FT_Error  Load_ChainContextSubst2(
 					      backtrack_offset, base_offset,
 					      stream ) ) != FT_Err_Ok )
       goto Fail5;
-	     
+
   if ( ( error = GSUB_Load_EmptyOrClassDefinition( &ccsf2->InputClassDef, count,
 					      input_offset, base_offset,
 					      stream ) ) != FT_Err_Ok )
@@ -3242,7 +3251,7 @@ static FT_Error  Lookup_ChainContextSubst1( HB_GSUBHeader*               gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + igc - i + lgc == buffer->in_length )
+	if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	  goto next_chainsubrule;
 	j++;
       }
@@ -3261,7 +3270,7 @@ static FT_Error  Lookup_ChainContextSubst1( HB_GSUBHeader*               gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  return error;
 
-	if ( j + lgc - i == buffer->in_length )
+	if ( j + lgc - i == (FT_Long)buffer->in_length )
 	  goto next_chainsubrule;
 	j++;
       }
@@ -3413,7 +3422,7 @@ static FT_Error  Lookup_ChainContextSubst2( HB_GSUBHeader*               gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End1;
 
-	if ( j + igc - i + lgc == buffer->in_length )
+	if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	  goto next_chainsubclassrule;
 	j++;
       }
@@ -3443,7 +3452,7 @@ static FT_Error  Lookup_ChainContextSubst2( HB_GSUBHeader*               gsub,
 	if ( error && error != HB_Err_Not_Covered )
 	  goto End1;
 
-	if ( j + lgc - i == buffer->in_length )
+	if ( j + lgc - i == (FT_Long)buffer->in_length )
 	  goto next_chainsubclassrule;
 	j++;
       }
@@ -3554,8 +3563,8 @@ static FT_Error  Lookup_ChainContextSubst3( HB_GSUBHeader*               gsub,
     {
       if ( error && error != HB_Err_Not_Covered )
 	return error;
-      
-      if ( j + igc - i + lgc == buffer->in_length )
+
+      if ( j + igc - i + lgc == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -3577,7 +3586,7 @@ static FT_Error  Lookup_ChainContextSubst3( HB_GSUBHeader*               gsub,
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + lgc - i == buffer->in_length )
+      if ( j + lgc - i == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -3650,17 +3659,17 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
 
   if ( ACCESS_Frame( 2L ) )
     return error;
-  
+
   rccs->SubstFormat = GET_UShort();
-  
+
   if ( rccs->SubstFormat != 1 )
     return HB_Err_Invalid_GSUB_SubTable_Format;
 
-  FORGET_Frame();   
+  FORGET_Frame();
 
   if ( ACCESS_Frame( 2L ) )
     return error;
-  
+
   new_offset = GET_UShort() + base_offset;
 
   FORGET_Frame();
@@ -3671,12 +3680,12 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
     return error;
   (void)FILE_Seek( cur_offset );
 
-  
+
   if ( ACCESS_Frame( 2L ) )
     goto Fail4;
 
   rccs->BacktrackGlyphCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   rccs->BacktrackCoverage = NULL;
@@ -3686,7 +3695,7 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
   if ( ALLOC_ARRAY( rccs->BacktrackCoverage, backtrack_count,
 		    HB_Coverage ) )
     goto Fail4;
-  
+
   b = rccs->BacktrackCoverage;
 
   for ( nb = 0; nb < backtrack_count; nb++ )
@@ -3710,7 +3719,7 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
     goto Fail3;
 
   rccs->LookaheadGlyphCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   rccs->LookaheadCoverage = NULL;
@@ -3738,12 +3747,12 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
       goto Fail2;
     (void)FILE_Seek( cur_offset );
   }
- 
+
   if ( ACCESS_Frame( 2L ) )
     goto Fail2;
 
   rccs->GlyphCount = GET_UShort();
-  
+
   FORGET_Frame();
 
   rccs->Substitute = NULL;
@@ -3755,20 +3764,20 @@ static FT_Error  Load_ReverseChainContextSubst( HB_GSUB_SubTable* st,
     goto Fail2;
 
   sub = rccs->Substitute;
-  
+
   if ( ACCESS_Frame( count * 2L ) )
     goto Fail1;
-  
+
   for ( n = 0; n < count; n++ )
     sub[n] = GET_UShort();
-	  
+
   FORGET_Frame();
-  
+
   return FT_Err_Ok;
 
 Fail1:
   FREE( sub );
-  
+
 Fail2:
   for ( m = 0; m < nl; m++ )
     _HB_OPEN_Free_Coverage( &l[m], memory );
@@ -3782,21 +3791,21 @@ Fail3:
   FREE( b );
 
 Fail4:
-  _HB_OPEN_Free_Coverage( &rccs->Coverage, memory );    
+  _HB_OPEN_Free_Coverage( &rccs->Coverage, memory );
   return error;
 }
 
 
 static void  Free_ReverseChainContextSubst( HB_GSUB_SubTable* st,
 					    FT_Memory         memory )
-{  
+{
   FT_UShort      n, count;
   HB_ReverseChainContextSubst*  rccs = &st->reverse;
 
   HB_Coverage*  c;
 
   _HB_OPEN_Free_Coverage( &rccs->Coverage, memory );
-  
+
   if ( rccs->LookaheadCoverage )
   {
     count = rccs->LookaheadGlyphCount;
@@ -3847,10 +3856,10 @@ static FT_Error  Lookup_ReverseChainContextSubst( HB_GSUBHeader*    gsub,
   lgc = rccs->LookaheadGlyphCount;
 
   /* check whether context is too long; it is a first guess only */
-  
+
   if ( bgc > string_index || string_index + 1 + lgc > buffer->in_length )
     return HB_Err_Not_Covered;
-  
+
   if ( bgc )
   {
     /* Since we don't know in advance the number of glyphs to inspect,
@@ -3877,14 +3886,14 @@ static FT_Error  Lookup_ReverseChainContextSubst( HB_GSUBHeader*    gsub,
   }
 
   j = string_index;
- 
+
   error = _HB_OPEN_Coverage_Index( &rccs->Coverage, IN_GLYPH( j ), &input_index );
   if ( error )
       return error;
 
   /* we are starting for lookahead glyphs right after the last context
      glyph                                                             */
-  
+
   j += 1;
 
   lc       = rccs->LookaheadCoverage;
@@ -3896,7 +3905,7 @@ static FT_Error  Lookup_ReverseChainContextSubst( HB_GSUBHeader*    gsub,
       if ( error && error != HB_Err_Not_Covered )
 	return error;
 
-      if ( j + lgc - i == buffer->in_length )
+      if ( j + lgc - i == (FT_Long)buffer->in_length )
 	return HB_Err_Not_Covered;
       j++;
     }
@@ -3907,7 +3916,7 @@ static FT_Error  Lookup_ReverseChainContextSubst( HB_GSUBHeader*    gsub,
   }
 
   IN_GLYPH( string_index ) = rccs->Substitute[input_index];
-      
+
   return error;
 }
 
@@ -4110,7 +4119,7 @@ FT_Error  HB_GSUB_Query_Languages( HB_GSUBHeader*  gsub,
     return FT_Err_Invalid_Argument;
 
   memory = gsub->memory;
-  
+
   sl = &gsub->ScriptList;
   sr = sl->ScriptRecord;
 
@@ -4162,7 +4171,7 @@ FT_Error  HB_GSUB_Query_Features( HB_GSUBHeader*  gsub,
     return FT_Err_Invalid_Argument;
 
   memory = gsub->memory;
-  
+
   sl = &gsub->ScriptList;
   sr = sl->ScriptRecord;
 
@@ -4283,6 +4292,9 @@ static FT_Error  GSUB_Do_Glyph_Lookup( HB_GSUBHeader* gsub,
 static FT_Error  Load_DefaultSubst( HB_GSUB_SubTable* st,
 				    FT_Stream         stream )
 {
+  FT_UNUSED(st);
+  FT_UNUSED(stream);
+
   return HB_Err_Invalid_GSUB_SubTable_Format;
 }
 
@@ -4318,6 +4330,8 @@ FT_Error  _HB_GSUB_Load_SubTable( HB_GSUB_SubTable*  st,
 static void  Free_DefaultSubst( HB_GSUB_SubTable* st,
 				FT_Memory         memory )
 {
+  FT_UNUSED(st);
+  FT_UNUSED(memory);
 }
 
 typedef void  (*Free_Subst_Func_Type)( HB_GSUB_SubTable* st,
@@ -4398,14 +4412,14 @@ static FT_Error  Apply_ReverseChainContextSubst( HB_GSUBHeader*   gsub,
   FT_Error     error, retError = HB_Err_Not_Covered;
   FT_ULong     subtable_Count, string_index;
   FT_UShort    flags;
-  HB_Lookup*  lo;      
+  HB_Lookup*  lo;
 
   if ( buffer->in_length == 0 )
     return HB_Err_Not_Covered;
-  
+
   lo    = &gsub->LookupList.Lookup[lookup_index];
-  flags = lo->LookupFlag;      
-  
+  flags = lo->LookupFlag;
+
   for ( subtable_Count = 0; subtable_Count < lo->SubTableCount; subtable_Count++ )
   {
     string_index  = buffer->in_length - 1;
@@ -4426,7 +4440,7 @@ static FT_Error  Apply_ReverseChainContextSubst( HB_GSUBHeader*   gsub,
     }
     while (string_index--);
   }
-  
+
   return retError;
 }
 
@@ -4443,7 +4457,7 @@ FT_Error  HB_GSUB_Add_Feature( HB_GSUBHeader*  gsub,
   FT_UShort    lookup_count;
 
   /* Each feature can only be added once */
-  
+
   if ( !gsub ||
        feature_index >= gsub->FeatureList.FeatureCount ||
        gsub->FeatureList.ApplyCount == gsub->FeatureList.FeatureCount )
@@ -4558,16 +4572,16 @@ FT_Error  HB_GSUB_Apply_String( HB_GSUBHeader*   gsub,
       }
       else
 	retError = error;
-      
+
       if ( need_swap )
       {
 	error = hb_buffer_swap( buffer );
 	if ( error )
 	  goto End;
       }
-    } 
+    }
   }
-  
+
   error = retError;
 
 End:
diff --git a/pango/opentype/harfbuzz-impl.h b/pango/opentype/harfbuzz-impl.h
index 15b63c68..f31f5cde 100644
--- a/pango/opentype/harfbuzz-impl.h
+++ b/pango/opentype/harfbuzz-impl.h
@@ -41,6 +41,10 @@ FT_BEGIN_HEADER
 # define TTAG_GSUB  FT_MAKE_TAG( 'G', 'S', 'U', 'B' )
 #endif
 
+#ifndef FT_UNUSED
+# define FT_UNUSED(arg) ((arg) = (arg))
+#endif
+
 #include "ftglue.h"
 
 #define ARRAY_LEN(Array) ((int)(sizeof (Array) / sizeof (Array)[0]))