1 files changed, 59 insertions, 0 deletions
diff --git a/ACE/ACEXML/common/Encoding.cpp b/ACE/ACEXML/common/Encoding.cpp
new file mode 100644
index 00000000000..4531fad20c3
--- /dev/null
+++ b/ACE/ACEXML/common/Encoding.cpp
@@ -0,0 +1,59 @@
+// -*- C++ -*-  $Id$
+
+#include "ACEXML/common/Encoding.h"
+#include "ace/OS_NS_string.h"
+
+const ACEXML_Char* ACEXML_Encoding::encoding_names_[8] = {
+  ACE_TEXT ("UCS-4BE"),
+  ACE_TEXT ("UCS-4LE"),
+  ACE_TEXT ("UCS-4_2143"),
+  ACE_TEXT ("UCS-4_3412"),
+  ACE_TEXT ("UTF-16"),
+  ACE_TEXT ("UTF-16"),
+  ACE_TEXT ("UTF-8"),
+  ACE_TEXT ("Unsupported Encoding")
+};
+
+const ACEXML_UTF8 ACEXML_Encoding::byte_order_mark_[][4] = {
+  { '\x00', '\x00', '\xFE', '\xFF' }, // UCS-4, big-endian  (1234 order)
+  { '\xFF', '\xFE', '\x00', '\x00' }, // UCS-4, little-endian  (4321 order)
+  { '\x00', '\x00', '\xFF', '\xFE' }, // UCS-4, unusual octet order (2143)
+  { '\xFE', '\xFF', '\x00', '\x00' }, // UCS-4, unusual octet order (3412)
+  { '\xFE', '\xFF', '\xFF', '\xFF' }, // UTF-16, big-endian (3 & 4 != 0)
+  { '\xFF', '\xFE', '\xFF', '\xFF' }, // UTF-16, little-endian ( 3 & 4 != 0)
+  { '\xEF', '\xBB', '\xBF', '\xFF' }  // UTF-8
+};
+
+const ACEXML_UTF8 ACEXML_Encoding::magic_values_[][4] = {
+  { '\x00', '\x00', '\x00', '\x3c' }, //
+  { '\x3c', '\x00', '\x00', '\x00' }, // UCS-4 and variants
+  { '\x00', '\x00', '\x3c', '\x00' }, //
+  { '\x00', '\x3c', '\x00', '\x00' }, //
+  { '\x00', '\x3c', '\x00', '\x3f' }, // UTF-16BE
+  { '\x3c', '\x00', '\x3f', '\x00' }, // UTF-16LE
+  { '\x3c', '\x3f', '\x78', '\x6d' }, // UTF-8
+};
+
+const ACEXML_Char*
+ACEXML_Encoding::get_encoding (const char* input)
+{
+  if ((ACE_OS::memcmp (&ACEXML_Encoding::byte_order_mark_[ACEXML_Encoding::UTF16BE][0], input, 2) == 0)
+      && (input[2] != 0 || input[3] != 0)) // 3 & 4 should not be both zero
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF16BE];
+  else if ((ACE_OS::memcmp (&ACEXML_Encoding::byte_order_mark_[ACEXML_Encoding::UTF16LE][0], input, 2) == 0)
+    && (input[2] != 0 || input[3] != 0)) // 3 & 4 should not be both zero
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF16LE];
+  else if (ACE_OS::memcmp (&ACEXML_Encoding::byte_order_mark_[ACEXML_Encoding::UTF8][0], input, 3) == 0)
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF8];
+  else if (ACE_OS::memcmp (&ACEXML_Encoding::magic_values_[ACEXML_Encoding::UTF16BE][0], input, 4) == 0)
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF16BE];
+  else if (ACE_OS::memcmp (&ACEXML_Encoding::magic_values_[ACEXML_Encoding::UTF16LE][0], input, 4) == 0)
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF16LE];
+  else if (ACE_OS::memcmp (&ACEXML_Encoding::magic_values_[ACEXML_Encoding::UTF8][0], input, 4) == 0)
+    return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF8];
+  else
+    {
+      // ACE_ERROR ((LM_ERROR, "Unknown encoding. Assuming UTF-8\n"));
+      return ACEXML_Encoding::encoding_names_[ACEXML_Encoding::UTF8];
+    }
+}