1 files changed, 74 insertions, 0 deletions
diff --git a/ACEXML/common/Transcode.h b/ACEXML/common/Transcode.h
new file mode 100644
index 00000000000..8547921aca3
--- /dev/null
+++ b/ACEXML/common/Transcode.h
@@ -0,0 +1,74 @@
+// -*- C++ -*- $Id$
+// This file declares functions to convert char string among different
+// unicode encoding (utf8, utf16, utf32)
+
+#ifndef _ACEXML_TRANSCODE_H_
+#define _ACEXML_TRANSCODE_H_
+#include "Common/XML_Types.h"
+
+class ACEXML_Export ACEXML_Transcoder
+{
+public:
+  enum
+  {
+    SUCCESS = 0,
+    DESTINATION_TOO_SHORT = -1,
+    END_OF_SOURCE = -2,
+    INVALID_ARGS = -3,
+    IS_SURROGATE = -4,
+    NON_UNICODE = -5
+  };
+
+
+  // The following functions translate a unicode characters
+  // into different encoding.  Return number of characters put into
+  // destination or consumed from src if success without
+  // error, otherwise, return corresponding error code.
+  static int utf162utf8 (ACEXML_UTF16 src,
+                         ACEXML_UTF8 *dst,
+                         size_t len);
+
+  static int ucs42utf8 (ACEXML_UCS4 src,
+                        ACEXML_UTF8 *dst,
+                        size_t len);
+
+  static int ucs42utf16 (ACEXML_UCS4 src,
+                         ACEXML_UTF16 *dst,
+                         size_t len);
+
+  static int surrogate2utf8 (ACEXML_UTF16 high,
+                             ACEXML_UTF16 low,
+                             ACEXML_UTF8 *dst,
+                             size_t len);
+
+  static int surrogate2ucs4 (ACEXML_UTF16 high,
+                             ACEXML_UTF16 low,
+                             ACEXML_UCS4 &dst);
+
+  static int utf82ucs4 (const ACEXML_UTF8 *src,
+                        size_t len,
+                        ACEXML_UCS4 &dst);
+
+  static int utf162ucs4 (const ACEXML_UTF16 *src,
+                        size_t len,
+                        ACEXML_UCS4 &dst);
+
+//    static int utf82utf16 (const ACEXML_UTF8 *src,
+//                           size_t len,
+//                           ACEXML_UTF16 &dst);
+  // This function does not handle surrogates.
+
+  // The following functions are non-inlined:
+  static int utf8s2utf16s (const ACEXML_UTF8 *src,
+                           ACEXML_UTF16 *dst,
+                           size_t len);
+
+  static int utf16s2utf8s (const ACEXML_UTF16 *src,
+                           ACEXML_UTF8 *dst,
+                           size_t len);
+};
+
+#if defined (__ACEXML_INLINE__)
+# include "Common/Transcode.i"
+#endif /* __ACEXML_INLINE__ */
+#endif /* _ACEXML_TRANSCODE_H_ */