重新改进支持Qt4.6-Qt6.1

3rd_smtpclient/mimecontentformatter.cpp

@@ -0,0 +1,51 @@
+#include "mimecontentformatter.h"
+
+MimeContentFormatter::MimeContentFormatter(int max_length) :
+	max_length(max_length)
+{}
+
+QString MimeContentFormatter::format(const QString &content, bool quotedPrintable) const
+{
+	QString out;
+
+	int chars = 0;
+
+	for (int i = 0; i < content.length() ; ++i) {
+		chars++;
+
+		if (!quotedPrintable) {
+			if (chars > max_length) {
+				out.append("\r\n");
+				chars = 1;
+			}
+		} else {
+			if (content.at(i) == '\n') {       // new line
+				out.append(content.at(i));
+				chars = 0;
+				continue;
+			}
+
+			if ((chars > max_length - 1)
+			        || ((content.at(i) == '=') && (chars > max_length - 3))) {
+				out.append('=');
+				out.append("\r\n");
+				chars = 1;
+			}
+
+		}
+
+		out.append(content.at(i));
+	}
+
+	return out;
+}
+
+void MimeContentFormatter::setMaxLength(int l)
+{
+	max_length = l;
+}
+
+int MimeContentFormatter::getMaxLength() const
+{
+	return max_length;
+}