new build system: build icu libs and xetex plus misc updates

git-svn-id: svn://tug.org/texlive/trunk@12759 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 37 insertions, 0 deletions

diff --git a/Build/source/libs/icu/icu-xetex/layout/ExtensionSubtables.cpp b/Build/source/libs/icu/icu-xetex/layout/ExtensionSubtables.cpp
new file mode 100644
index 00000000000..4a6ac4fd571
--- /dev/null
+++ b/Build/source/libs/icu/icu-xetex/layout/ExtensionSubtables.cpp
@@ -0,0 +1,37 @@
+/*
+ * %W% %E%
+ *
+ * (C) Copyright IBM Corp. 2002 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "OpenTypeTables.h"
+#include "GlyphSubstitutionTables.h"
+#include "LookupProcessor.h"
+#include "ExtensionSubtables.h"
+#include "GlyphIterator.h"
+#include "LESwaps.h"
+
+U_NAMESPACE_BEGIN
+
+// read a 32-bit value that might only be 16-bit-aligned in memory
+#define READ_LONG(code) (le_uint32)((SWAPW(*(le_uint16*)&code) << 16) + SWAPW(*(((le_uint16*)&code) + 1)))
+
+// FIXME: should look at the format too... maybe have a sub-class for it?
+le_uint32 ExtensionSubtable::process(const LookupProcessor *lookupProcessor, le_uint16 lookupType,
+                                      GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
+{
+    le_uint16 elt = SWAPW(extensionLookupType);
+
+    if (elt != lookupType) {
+        le_uint32 extOffset = READ_LONG(extensionOffset);
+        LookupSubtable *subtable = (LookupSubtable *) ((char *) this + extOffset);
+
+        return lookupProcessor->applySubtable(subtable, elt, glyphIterator, fontInstance);
+    }
+
+    return 0;
+}
+
+U_NAMESPACE_END