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//
// UTF32Encoding.cpp
//
// Library: Foundation
// Package: Text
// Module: UTF32Encoding
//
// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/UTF32Encoding.h"
#include "Poco/ByteOrder.h"
#include "Poco/String.h"
namespace Poco {
const char* UTF32Encoding::_names[] =
{
"UTF-32",
"UTF32",
NULL
};
const TextEncoding::CharacterMap UTF32Encoding::_charMap =
{
/* 00 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 10 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 20 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 30 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 40 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 50 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 60 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 70 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 80 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* 90 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* a0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* b0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* c0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* d0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* e0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
/* f0 */ -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
};
UTF32Encoding::UTF32Encoding(ByteOrderType byteOrder)
{
setByteOrder(byteOrder);
}
UTF32Encoding::UTF32Encoding(int byteOrderMark)
{
setByteOrder(byteOrderMark);
}
UTF32Encoding::~UTF32Encoding()
{
}
UTF32Encoding::ByteOrderType UTF32Encoding::getByteOrder() const
{
#if defined(POCO_ARCH_BIG_ENDIAN)
return _flipBytes ? LITTLE_ENDIAN_BYTE_ORDER : BIG_ENDIAN_BYTE_ORDER;
#else
return _flipBytes ? BIG_ENDIAN_BYTE_ORDER : LITTLE_ENDIAN_BYTE_ORDER;
#endif
}
void UTF32Encoding::setByteOrder(ByteOrderType byteOrder)
{
#if defined(POCO_ARCH_BIG_ENDIAN)
_flipBytes = byteOrder == LITTLE_ENDIAN_BYTE_ORDER;
#else
_flipBytes = byteOrder == BIG_ENDIAN_BYTE_ORDER;;
#endif
}
void UTF32Encoding::setByteOrder(int byteOrderMark)
{
_flipBytes = byteOrderMark != 0xFEFF;
}
const char* UTF32Encoding::canonicalName() const
{
return _names[0];
}
bool UTF32Encoding::isA(const std::string& encodingName) const
{
for (const char** name = _names; *name; ++name)
{
if (Poco::icompare(encodingName, *name) == 0)
return true;
}
return false;
}
const TextEncoding::CharacterMap& UTF32Encoding::characterMap() const
{
return _charMap;
}
int UTF32Encoding::convert(const unsigned char* bytes) const
{
UInt32 uc;
unsigned char* p = (unsigned char*) &uc;
*p++ = *bytes++;
*p++ = *bytes++;
*p++ = *bytes++;
*p++ = *bytes++;
if (_flipBytes)
{
ByteOrder::flipBytes(uc);
}
return uc;
}
int UTF32Encoding::convert(int ch, unsigned char* bytes, int length) const
{
if (bytes && length >= 4)
{
UInt32 ch1 = _flipBytes ? ByteOrder::flipBytes((UInt32) ch) : (UInt32) ch;
unsigned char* p = (unsigned char*) &ch1;
*bytes++ = *p++;
*bytes++ = *p++;
*bytes++ = *p++;
*bytes++ = *p++;
}
return 4;
}
int UTF32Encoding::queryConvert(const unsigned char* bytes, int length) const
{
int ret = -4;
if (length >= 4)
{
UInt32 uc;
unsigned char* p = (unsigned char*) &uc;
*p++ = *bytes++;
*p++ = *bytes++;
*p++ = *bytes++;
*p++ = *bytes++;
if (_flipBytes)
ByteOrder::flipBytes(uc);
return uc;
}
return ret;
}
int UTF32Encoding::sequenceLength(const unsigned char* /*bytes*/, int /*length*/) const
{
return 4;
}
} // namespace Poco
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