#include?“utfTools.h“
#include?
#include?
using?namespace?std;

CUtfTools*?CUtfTools::getInstance（）
{
	static?CUtfTools?gCUtfTools;
	return?&gCUtfTools;
}


CUtfTools::CUtfTools（）
{

}

CUtfTools::~CUtfTools（）
{

}

int?CUtfTools::Utf16_To_Utf8（MYUTF16*?sourceStart?MYUTF8*?targetStart?size_t?outLen?ConversionFlags?flags?SourceDataByteOrder?byteOrder）
{
	int?result?=?0;
	MYUTF16*?source?=?sourceStart;
	MYUTF8*?target?=?targetStart;
	MYUTF8*?targetEnd?=?targetStart?+?outLen;

	if?（（NULL?==?source）?||?（NULL?==?targetStart））{
		printf（“ERR?Utf16_To_Utf8:?source=%p?targetStart=%p\n“?source?targetStart）;
		return?conversionFailed;
	}

	while?（*source）?{
		//網(wǎng)絡(luò)上的數(shù)據(jù)都是大端，權(quán)重越大的數(shù)據(jù)優(yōu)先傳輸
		if?（byteOrder?==?BigEndian）
		{
			*source?=?ntohs（*source）;
		}
		MYUTF32?ch;
		unsigned?short?bytesToWrite?=?0;
		const?MYUTF32?byteMask?=?0xBF;
		const?MYUTF32?byteMark?=?0x80;
		MYUTF16*?oldSource?=?source;?/*?In?case?we?have?to?back?up?because?of?target?overflow.?*/
		ch?=?*source++;
		/*?If?we?have?a?surrogate?pair?convert?to?UTF32?first.?*/
		if?（ch?>=?UNI_SUR_HIGH_START?&&?ch?<=?UNI_SUR_HIGH_END）?{
			/*?If?the?16?bits?following?the?high?surrogate?are?in?the?source?buffer...?*/
			if?（*source）{
				MYUTF32?ch2?=?*source;
				/*?If?it‘s?a?low?surrogate?convert?to?UTF32.?*/
				if?（ch2?>=?UNI_SUR_LOW_START?&&?ch2?<=?UNI_SUR_LOW_END）?{
					ch?=?（（ch?-?UNI_SUR_HIGH_START）?<se;
					++source;
				}
				else?if?（flags?==?strictConversion）?{?/*?it‘s?an?unpaired?high?surrogate?*/
					--source;?/*?return?to?the?illegal?value?itself?*/
					result?=?sourceIllegal;
					break;
				}
			}
			else?{?/*?We?don‘t?have?the?16?bits?following?the?high?surrogate.?*/
				--source;?/*?return?to?the?high?surrogate?*/
				result?=?sourceExhausted;
				break;
			}
		}
		else?if?（flags?==?strictConversion）?{
			/*?UTF-16?surrogate?values?are?illegal?in?UTF-32?*/
			if?（ch?>=?UNI_SUR_LOW_START?&&?ch?<=?UNI_SUR_LOW_END）{
				--source;?/*?return?to?the?illegal?value?itself?*/
				result?=?sourceIllegal;
				break;
			}
		}
		/*?Figure?out?how?many?bytes?the?result?will?require?*/
		if?（ch?			bytesToWrite?=?1;
		}
		else?if?（ch?			bytesToWrite?=?2;
		}
		else?if?（ch?			bytesToWrite?=?3;
		}
		else?if?（ch?			bytesToWrite?=?4;
		}
		else?{
			bytesToWrite?=?3;
			ch?=?UNI_REPLACEMENT_CHAR;
		}

		target?+=?bytesToWrite;
		if?（target?>?targetEnd）?{
			source?=?oldSource;?/*?Back?up?source?pointer!?*/
			target?-=?bytesToWrite;?result?=?targetExhausted;?break;
		}
		switch?（bytesToWrite）?{?/*?note:?everything?falls?through.?*/
		case?4:?*--target?=?（MYUTF8）（（ch?|?byteMark）?&?byteMask）;?ch?>>=?6;
		case?3:?*--target?=?（MYUTF8）（（ch?|?byteMark）?&?byteMask）;?ch?>>=?6;
		case?2:?*--target?=?（MYUTF8）（（ch?|?byteMark）?&?byteMask）;?ch?>>=?6;
		case?1

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件?????????320??2019-01-25?09:32??readMe.txt
?????文件???????16729??2019-01-25?09:17??utfTools.cpp
?????文件????????3762??2019-01-25?09:10??utfTools.h
?????文件???????33628??2019-01-25?09:33??字符編碼.docx