20060303a

1 files changed, 189 insertions, 0 deletions

diff --git a/libfreetype/otljstf.c b/libfreetype/otljstf.c
new file mode 100644
index 00000000..b0fa9f40
--- /dev/null
+++ b/libfreetype/otljstf.c
@@ -0,0 +1,189 @@
+#include "otljstf.h"
+#include "otlcommn.h"
+#include "otlgpos.h"
+
+  static void
+  otl_jstf_extender_validate( OTL_Bytes      table,
+                              OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 2 );
+
+    count = OTL_NEXT_USHORT( p );
+
+    OTL_CHECK( count*2 );
+  }
+
+
+  static void
+  otl_jstf_gsub_mods_validate( OTL_Bytes      table,
+                               OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 2 );
+    count = OTL_NEXT_USHORT( p );
+    OTL_CHECK( count*2 );
+
+    /* XXX: check GSUB lookup indices */
+  }
+
+
+  static void
+  otl_jstf_gpos_mods_validate( OTL_Bytes      table,
+                               OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 2 );
+    count = OTL_NEXT_USHORT( p );
+    OTL_CHECK( count*2 );
+
+    /* XXX: check GPOS lookup indices */
+  }
+
+
+  static void
+  otl_jstf_max_validate( OTL_Bytes      table,
+                         OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 2 );
+
+    count = OTL_NEXT_USHORT( p );
+
+    OTL_CHECK( count*2 );
+    for ( ; count > 0; count-- )
+      otl_gpos_subtable_check( table + OTL_NEXT_USHORT( p ), valid );
+  }
+
+
+  static void
+  otl_jstf_priority_validate( OTL_Bytes      table,
+                              OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   offset;
+
+    OTL_CHECK( 20 );
+
+    /* shrinkage GSUB enable/disable */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gsub_mods_validate( table + val, valid );
+
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gsub_mods_validate( table + val, valid );
+
+    /* shrinkage GPOS enable/disable */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gpos_mods_validate( table + val, valid );
+
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gpos_mods_validate( table + val, valid );
+
+    /* shrinkage JSTF max */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_max_validate( table + val, valid );
+
+    /* extension GSUB enable/disable */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gsub_mods_validate( table + val, valid );
+
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gsub_mods_validate( table + val, valid );
+
+    /* extension GPOS enable/disable */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gpos_mods_validate( table + val, valid );
+
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_gpos_mods_validate( table + val, valid );
+
+    /* extension JSTF max */
+    val = OTL_NEXT_USHORT( p );
+    if ( val )
+      otl_jstf_max_validate( table + val, valid );
+  }
+
+  static void
+  otl_jstf_lang_validate( OTL_Bytes      table,
+                          OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 2 );
+
+    count = OTL_NEXT_USHORT( p );
+
+    OTL_CHECK( count*2 );
+    for ( ; count > 0; count-- )
+      otl_jstf_priority_validate( table + OTL_NEXT_USHORT( p ), valid );
+  }
+
+
+  static void
+  otl_jstf_script_validate( OTL_Bytes      table,
+                            OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count, extender, default_lang;
+
+    OTL_CHECK( 6 );
+    extender     = OTL_NEXT_USHORT( p );
+    default_lang = OTL_NEXT_USHORT( p );
+    count        = OTL_NEXT_USHORT( p );
+
+    if ( extender )
+      otl_jstf_extender_validate( table + extender, valid );
+
+    if ( default_lang )
+      otl_jstf_lang_validate( table + default_lang, valid );
+
+    OTL_CHECK( 6*count );
+
+    for ( ; count > 0; count-- )
+    {
+      p += 4;  /* ignore tag */
+      otl_jstf_lang_validate( table + OTL_NEXT_USHORT( p ), valid );
+    }
+  }
+
+
+  OTL_LOCALDEF( void )
+  otl_jstf_validate( OTL_Bytes      table,
+                     OTL_Validator  valid )
+  {
+    OTL_Bytes  p = table;
+    OTL_UInt   count;
+
+    OTL_CHECK( 4 );
+
+    if ( OTL_NEXT_ULONG( p ) != 0x10000UL )
+      OTL_INVALID_DATA;
+
+    count = OTL_NEXT_USHORT( p );
+    OTL_CHECK( count*6 );
+
+    for ( ; count > 0; count++ )
+    {
+      p += 4;  /* ignore tag */
+      otl_jstf_script_validate( table + OTL_NEXT_USHORT( p ), valid );
+    }
+  }
+  
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