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// -*- 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];
}
}
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