added: Q encoding in misc: QEncode()

for mails headers encoding



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@711 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/misc.cpp

@@ -952,3 +952,62 @@ static std::string ain;
 	UrlEncode(ain, out, clear_out);
 }
 
+
+
+
+void QEncodeAddChar(wchar_t c, std::string & out)
+{
+	if( (c>='A' && c<='Z') ||
+		(c>='a' && c<='z') ||
+		(c>='0' && c<='9') )
+	{
+		out += char(c);
+	}
+	else
+	{
+		char buf1[10];
+		char buf2[10];
+
+		size_t len1 = sizeof(buf1) / sizeof(char);
+		size_t len2 = sizeof(buf2) / sizeof(char);
+		size_t len  = Ezc::IntToUTF8(int(c), buf1, len1);
+
+		for(size_t i=0 ; i<len ; ++i)
+		{
+			// make sure that it produces *capital* letters (ABC...)
+			Toa((unsigned long)(unsigned char)buf1[i], buf2, len2, 16);
+			out += '=';
+			out += buf2;
+		}
+	}
+}
+
+
+
+/*
+	this encoding is used in mails headers
+	encoded-word = "=?" charset "?" encoding "?" encoded-text "?="
+	http://www.faqs.org/rfcs/rfc1522.html
+
+	we have:
+	charset  = UTF-8
+	encoding = Q
+
+	current limitation:
+	we do not support checking the maximum length:
+	"An encoded-word may not be more than 75 characters long, including
+     charset, encoding, encoded-text, and delimiters."
+*/
+void QEncode(const std::wstring & in, std::string & out, bool clear)
+{
+	if( clear )
+		out.clear();
+
+	out += "=?UTF-8?Q?";
+
+	for(size_t i=0 ; i<in.size() ; ++i)
+		QEncodeAddChar(in[i], out);
+
+	out += "?=";
+}
+

core/misc.h

@@ -426,5 +426,6 @@ tm     Time(time_t par);
 void UrlEncode(const std::string & in,  std::string & out, bool clear_out = true);
 void UrlEncode(const std::wstring & in, std::string & out, bool clear_out = true);
 
+void QEncode(const std::wstring & in, std::string & out, bool clear = true);
 
 #endif