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MBCS�� ڵ�(Unicode)
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MBCS (Multi-byte Character Set)
��ڵ� (Unicode)
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MBCS�� ڵ�� Ͽ� ��ǰ� ��ͼ� �� ҽ��ϴ�.
MBCS (Multi-byte Character Set)
MBCS�� Multi-byte Character Set�� Դϴ�. ��߹��Ʈ�� ϴ� ��ó�� 1�� ڸ� ǥ��ϴµ� 1��Ʈ �Ǵ� 2��Ʈ�� մϴ�. �� �� 쿡�� 1��Ʈ�� ǥ��Ǳ� �� SBCS(Single-byte Character Set)�� մϴ�. �Ϲ�� ASCII�� ϴ� ��ڵ�� SBCS�� ϴٰ� �� ֽ��ϴ�. �׷�� ߱��, �Ϻ��, �ѱ�� 1��Ʈ�δ� 1�� ڸ� ǥ�� 2��Ʈ�� ϳ�� ڸ� ǥ��մϴ�. �׷�� DBCS(Double-byte Character Set)�� մϴ�. MBCS == SBCS + DBCS�� ְڱ��.
MBCS�� ڰ� 1��Ʈ�� ͵�� ڰ� 2��Ʈ�� ͵�� ְ� �˴ϴ�. �׷�� 1��Ʈ�� , 2��Ʈ�� �� ұ��? 1�� Ʈ�� о 0x80(�� 128)�� ͵�� 1�� ڸ� ǥ��մϴ�(SBCS). �׷�� ̰�� 0x80�� ũ�ų� �� 쿡�� ι�° ��Ʈ�� Ͽ� 2��Ʈ�� ϳ�� ڸ� ǥ��ϰ� �˴ϴ�(DBCS). �� Ʈ�� ϳ�� ڸ� ��Ÿ�� , ù��° ��Ʈ�� Lead Byte, �ι�° ��Ʈ�� Trail Byte�� Ѵ�ϴ�. Lead Byte�� 0x7F(127)�� ׻� Ŀ�� , Trail Byte�� 0�� ƴϸ� �ȴٴ±��.
�� ǿ� �� SBCS�� \0(null)�� ϰ� 127�� ڸ� ǥ�� ֽ��ϴ�. 1��ڿ� �̸�� ѱ�� ǥ��ϱ⿡�� ſ� ��ϰ� �Ϻ�� 󰡳� 50�ڿ� ��ٰ�� 50�ڸ� ǥ��ϱ⿡�� ֽ��ϴ�. �� ڴ� �õ� ��? �׷�� 2��Ʈ �� DBCS�� ϰ� �Ǵµ� �� 쿡�� Lead Byte�� 128~255�� 128��, Trail Byte�� 0�� 255�ڸ� �� Ƿ� 128*255 == 32640�� ڸ� ǥ�� ֽ��ϴ�. MBCS�� ü�� 127+32640 == 32767�� ڸ� �� ִٴ� �̷�� ɴϴ�.
�� MBCS�� ϳ�� ڵ�� ֽ��ϴ�. �� MBCS�� ڵ�� ƴ϶� ��ڵ� �� ϴ� ��Դϴ� (�� Ȯ�ϰԴ� 2��Ʈ�� ڸ� ǥ��ϴ� ��յ�� ̸�� ̶�� ߰ڱ��). �� MBCS�� ش��ϴ� ��ڵ��̶� Shift-JIS, EUC-KR, BIG5 �� Ϻ��, �ѱ�, �߱�� 2��Ʈ�� ڵ��ϴ� �� ̸�� ø� �˴ϴ�(�� MBCS��ٴ� DBCS��  �鿡�� Ȯ�� ǥ�� ֽ��ϴ�). �� Ȯ�� ǻ�� ؼ�� "EUC-KR�� UTF-16 ��ڵ�� ̴�?", "UCS-2�� UTF-8�� ٸ� ��?" �� Ȯ�� ڵ�� ؾ� �մϴ�. �Ʒ� ǥ�� ǥ�� ̸�� ǥ�ؿ�� θ� ��Ǵ� ��ڵ�� غ��ҽ��ϴ�(Unicode�� ISO/IEC 10646�� ణ�� ̴� �� ǥ��̶�� ø� �˴ϴ�).

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MBCS KSC 5601-1987 EUC-KR �ѱ� ��ڵ�

JIS X 0208-1990 EUC-JP
Shift-JIS �Ϻ�� ڵ�

GB 18030 BIG5
GB2312 �߱�� ü ��ڵ�
�߱�� ü ��ڵ�

Unicode Unicode UTF-16 ��ڵ� 2��Ʈ ��ڵ�

Unicode UTF-32 ��ڵ� 4��Ʈ��ڵ�

Unicode UTF-8 ��ڵ� multi-byte ��ڵ�

ISO/IEC 10646 UCS-2 ��ǥ��ȭ�ⱸ(ISO), 2��Ʈ ��ڵ�

ISO/IEC 10646 UCS-4 ��ǥ��ȭ�ⱸ(ISO), 4��Ʈ ��ڵ�

��ڵ�(Unicode)�� ڵ�
��ڵ忡 �� ڼ�� ڵ�(Unicode)�� ڵ� ��ڵ� �� Ͻʽÿ�. �� ø� ��ڵ� �� ڵ�� Ǿ� �ֽ��ϴ�. ��ϰ� ��غ�� UCS-2, UCS-4, UTF-8, UTF-16, UTF-32 �� ڵ�� ֽ��ϴ�. �ణ�� ̴� �� UCS-2 == UTF-16, UCS-4 == UTF-32�� ø� �˴ϴ�. �� ΰ��, �Ǵ� 4��, ��ڵ�� ڸ� ǥ��ϴ� ��Ʈ �� մϴ�. UCS-2�� UTF-16�� 1�� ڸ� 2��Ʈ��(UTF-16�� 4��Ʈ�� ǥ��˴ϴ� �� ֽ��ϴ�). UTF-32�� UCS-4�� 1��ڰ� 4��Ʈ�� մϴ�. UTF-8�� 1~4��Ʈ�� ̷� ��ڵ忡 ��ǵǴ� �� ڸ� ǥ�� ֽ��ϴ�. �ڼ�� ũ�� Ͻʽÿ�.
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MBCS�� UCS2�� ־� �̷�� ϵ帳�ϴ�. /////////////////// �ؽ�Ʈ�տ� L�� ġ�� USC2�� ȯ�Ǵ� �� ˰� �ֽ��ϴ�. "ȿ��"�� ؽ�Ʈ�� Ʒ�� ϴ�. "ȿ��" => 0xBFC8 0xAEB8 //MBCS L"ȿ��" => 0xD6A8 0xB9AC //UCS2 MBCS�� UCS2�� UCS2�� ׻� 2��Ʈ�� Ҵ��ϴ� �ݸ�, MBCS�� 1��Ʈ�� ǥ�� ִ� ��ڴ� 1��Ʈ�� ǥ��ϴ� �ɷ� �˰� �ֽ��ϴ�. (i.e ASCII) ��, MBCS�� ѹ��ڿ� �� Ҵ�Ǵ� ��Ʈ�� ʴٴ� ��. ��⼭ �ǹ�� ֽ��ϴ�. "ȿ��"�� ڸ� ��ε�� , �� UCS2�� MBCS�� ٸ� �ɱ��? �� 2��Ʈ�� Ҵ�Ǵµ� MBCS�� UCS2�� Ҵ��ع��, MBCS <=> UCS2 �� ؽ�Ʈ ��ȯ�� ٵ��. �ƴѰ��? (UCS2�� Ʈ�� 0�� 쿡�� MBCS�� 1��Ʈ�� ǥ��ϸ� �� ?) Ư�� ִ� �� ּ��.

�� ڵ�� ؼ� �� ִ� ��̶�� ֽ��ϴ�. MBCS(�� EUC-KR)�� ι��Ʈ�� տ� ��ؼ� �ϳ�� ڸ� ǥ��մϴ�. �� 'ȿ'�ڴ� 0xBFC8�̶�� ٴ� 0xBF + 0xC8�� տ� ��ؼ� �ϳ�� ڸ� ǥ��ϴ� ��Դϴ�. �ݸ�, UCS2�� 'ȿ'(0xD6A8)�� ι��Ʈ ��ü�� ϳ�� Դϴ�. C ��Ÿ�Ϸ� �̾߱��Ѵٸ� EUCKR�� 'ȿ'�� char[2]�̰�, UCS-2�� unsigned short int�� ø� �˴ϴ�.
�׸��, �ռ� �� ٿ� �� EUC-KR�� ̷�� ǥ�� ִ� �� 32767��Դϴ�. �׷�� EUC-KR�� ǥ�� KSC-5601�� ־ �ѱ� 2350��, �� 4888��, Ư�� 1128�ڸ�� ϰ� �ֽ��ϴ�. �ݸ� UCS-2�� 255*255-1 == 65535�� ڸ� ǥ�� ֽ��ϴ�. UCS-2�� ѱ� 11172�� ΰ� ǥ��Ǿ��, ��ڵ� 27786�ڸ� ��ϰ� �ֽ��ϴ�(Unicode 4.0 ǥ�ؿ�� ڰ� �� ߰��Ǿ��ϴ�). �̿� �� EUC-KR(�Ǵ� MBCS)�� ڵ�� ڸ� ǥ�� ִ� �� ٸ�� 翬�� Ҵ�� ޶��.
�� ϳ�� EUC-KR�� , �ѱ� ��ڸ�� ڵ��̹Ƿ� �� ĺ�, ��, Ư��, �ѱ�, �� Ϻ� ��� ǥ��ϸ� �˴ϴ�. �ƶ��, �±�� 쿡�� EUC-KR�� ʿ䰡 ��. ��ó�� MBCS�� 2��Ʈ �� 缭 �� յ��Դϴ�. �׷�� Ŀ� ��ڵ� �� Unicode�� ڸ� �� ϴ� ��̹Ƿ� �� �� Ǵ� ��ڸ� �Ǿ�� մϴ�. �׷��ڸ� �翬�� EUC-KR�� ߻�� ۿ� �� Դϴ�. �ѱ� ��ڸ�� KSC-5601�� ڵ忡 �� ϱ�� ? �츮�� ̱�� 뱹�� ƴϴϱ� ��Դϴ�.
MBCS-UCS2�� ؽ�Ʈ ��ȯ�� iconv�� ̺귯�� ̿��ϸ� �� Դϴ� (libiconv Ȩ�� Ͻʽÿ�). �ٸ� UCS2�� ⺻ �� unsigned short int�̱� �� char[]�� string Ÿ�� ó��ϱⰡ ��ϴ�(UCS-4�� 쿡�� unsigned int�� ߻��մϴ�). �� Ʈ�� 0�� . �׷�� UTF-8�̶�� ڵ�� ϴ�. �� ڵ�� ASCII�� մϴ�. �� 쿡�� 2��Ʈ��, �ѱ�� 3��Ʈ, ��ڴ� 3��Ʈ �Ǵ� 4��Ʈ�� ڵ��˴ϴ�. �� ڵ�� Ư¡�� Ʈ�� 0�� ʽ��ϴ�. �׷�� C�� char �迭�̳� C++�� string Ÿ�� ״�� ؼ� �� ִ� �� ֽ��ϴ�. �̷� �� α׷��ֿ�� UTF-8�� ϴ� �� Դϴ�. UTF-8�� ڼ�� ڵ�(Unicode)�� ڵ� ��ڵ� �� Ͻʽÿ�.
�ռ� ��帰 �ٿ� �� MBCS�� ǥ�� ǿ�� (��δ� ISO 2022�� ǥ�� ֱ�� մϴ�) ��ǵǾ� �� ͵��̱� �� MBCS�� ǥ�ؿ�� Ļ�� ڵ�� ٱ�� ǥ��ϱ� ��ٴ� �� ֽ��ϴ�. KSC5601�� ڵ忡 ��ǵ� ��ڼ�� ̿�� ֵ�� MBCS�� ǥ�ؿ�� ǥ�� ִ� �� ڵ忡 �� ſ� ��ѵǾ� �ִ� �� ֽ��ϴ�. ��μ�� Windows 9X �迭�� OS�� ϱ� ��ٴ� �� ڵ�(Unicode), ��ڵ�� UTF-8�� մϴ�. �� ׸�â�� ٱ�� ��ϱ� �� UTF-8�� Ͽ� ��ǰ� �ֽ��ϴ�.

2006-02-03 ��

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