字符串之间的转换

最新推荐文章于 2022-05-31 22:12:59 发布

原创最新推荐文章于 2022-05-31 22:12:59 发布 · 504 阅读

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#字符串转换 #string #utf-8

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本文详细介绍了不同字符编码之间的转换方法，包括从UTF-8到ANSI、从Unicode到UTF-8以及string和wstring之间的相互转换。通过具体的代码实现，帮助读者理解如何在不同编码间进行有效转换。

string Utf8转ANSI

string Utf82Ansi(const char* utf8)
{

	int WLength = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, NULL);
	LPWSTR pszW = (LPWSTR)_alloca((WLength + 1) *sizeof(WCHAR));
	MultiByteToWideChar(CP_UTF8, 0, utf8, -1, pszW, WLength);
	pszW[WLength] = 0;

	int ALength = WideCharToMultiByte(CP_ACP, 0, pszW, -1, NULL, 0, NULL, NULL);
	LPSTR pszA = (LPSTR)_alloca(ALength + 1);
	WideCharToMultiByte(CP_ACP, 0, pszW, -1, pszA, ALength, NULL, NULL);
	pszA[ALength] = 0;
	return pszA;
}

char* Unicode2Utf8(const TCHAR* unicode)
{
	int len;
	len = WideCharToMultiByte(CP_UTF8, 0, (const wchar_t*)unicode, -1, NULL, 0, NULL, NULL);
	char *szUtf8 = (char*)malloc(len + 1);
	memset(szUtf8, 0, len + 1);
	WideCharToMultiByte(CP_UTF8, 0, (const wchar_t*)unicode, -1, szUtf8, len, NULL, NULL);
	return (char*)szUtf8;
}

string和wstring之间的转换

BOOL WStringToString(const std::wstring &wstr, std::string &str)
{
	int nLen = (int)wstr.length();
	str.resize(nLen, ' ');
	int nResult = WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)wstr.c_str(), nLen, (LPSTR)str.c_str(), nLen, NULL, NULL);

	if (nResult == 0)
	{
		return FALSE;
	}

	return TRUE;
}

BOOL StringToWString(const std::string &str, std::wstring &wstr)
{
	int nLen = (int)str.length();
	wstr.resize(nLen, L' ');

	int nResult = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)str.c_str(), nLen, (LPWSTR)wstr.c_str(), nLen);

	if (nResult == 0)
	{
		return FALSE;
	}

	return TRUE;
}

Cstring 转string

CString  cstr=L"AAAA";
CT2CA temptostr(cstr);
std::string str(temptostr);