1 files changed, 81 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-xetex/layout/CanonShaping.cpp b/Build/source/libs/icu/icu-xetex/layout/CanonShaping.cpp
new file mode 100644
index 00000000000..ea109a77d98
--- /dev/null
+++ b/Build/source/libs/icu/icu-xetex/layout/CanonShaping.cpp
@@ -0,0 +1,81 @@
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LEGlyphStorage.h"
+#include "CanonShaping.h"
+#include "GlyphDefinitionTables.h"
+#include "ClassDefinitionTables.h"
+
+U_NAMESPACE_BEGIN
+
+void CanonShaping::sortMarks(le_int32 *indices, const le_int32 *combiningClasses, le_int32 index, le_int32 limit)
+{
+    for (le_int32 j = index + 1; j < limit; j += 1) {
+        le_int32 i;
+        le_int32 v = indices[j];
+        le_int32 c = combiningClasses[v];
+
+        for (i = j - 1; i >= index; i -= 1) {
+            if (c >= combiningClasses[indices[i]]) {
+                break;
+            }
+
+            indices[i + 1] = indices[i];
+        }
+
+        indices[i + 1] = v;
+    }
+}
+
+void CanonShaping::reorderMarks(const LEUnicode *inChars, le_int32 charCount, le_bool rightToLeft,
+                                LEUnicode *outChars, LEGlyphStorage &glyphStorage)
+{
+    const GlyphDefinitionTableHeader *gdefTable = (const GlyphDefinitionTableHeader *) glyphDefinitionTable;
+    const ClassDefinitionTable *classTable = gdefTable->getMarkAttachClassDefinitionTable();
+    le_int32 *combiningClasses = LE_NEW_ARRAY(le_int32, charCount);
+    le_int32 *indices = LE_NEW_ARRAY(le_int32, charCount);
+    LEErrorCode status = LE_NO_ERROR;
+    le_int32 i;
+
+    for (i = 0; i < charCount; i += 1) {
+        combiningClasses[i] = classTable->getGlyphClass((LEGlyphID) inChars[i]);
+        indices[i] = i;
+    }
+
+    for (i = 0; i < charCount; i += 1) {
+        if (combiningClasses[i] != 0) {
+            le_int32 mark;
+
+            for (mark = i; mark < charCount; mark += 1) {
+                if (combiningClasses[mark] == 0) {
+                    break;
+                }
+            }
+
+            sortMarks(indices, combiningClasses, i, mark);
+        }
+    }
+
+    le_int32 out = 0, dir = 1;
+
+    if (rightToLeft) {
+        out = charCount - 1;
+        dir = -1;
+    }
+
+    for (i = 0; i < charCount; i += 1, out += dir) {
+        le_int32 index = indices[i];
+
+        outChars[i] = inChars[index];
+        glyphStorage.setCharIndex(out, index, status);
+    }
+
+    LE_DELETE_ARRAY(indices);
+    LE_DELETE_ARRAY(combiningClasses);
+}
+
+U_NAMESPACE_END