1 files changed, 144 insertions, 0 deletions
diff --git a/libmail/qp.C b/libmail/qp.C
new file mode 100644
index 0000000..0d30a45
--- /dev/null
+++ b/libmail/qp.C
@@ -0,0 +1,144 @@
+/*
+** Copyright 2002-2009, Double Precision Inc.
+**
+** See COPYING for distribution information.
+*/
+#include "libmail_config.h"
+
+#include "qp.H"
+
+#include <string.h>
+
+using namespace std;
+
+static inline int xdigit(char c)
+{
+	static const char xdigits[]="0123456789ABCDEFabcdef";
+
+	const char *p=strchr(xdigits, c);
+
+	if (p == NULL)
+		return -1;
+
+	int n= p - xdigits;
+
+	if (n >= 16)
+		n -= 6;
+	return n;
+}
+
+mail::decodeqp::decodeqp()
+	: decodeBuffer("")
+{
+}
+
+mail::decodeqp::~decodeqp()
+{
+}
+
+void mail::decodeqp::decode(string text)
+{
+	string decodedString="";
+
+	text=decodeBuffer + text;
+
+	// Just decode as much as possible, and leave the rest for next time.
+
+	string::iterator b=text.begin(), e=text.end(), c=b;
+
+	while (b != e)
+	{
+		// Look for the next =
+
+		for (c=b; c != e; c++)
+			if (*c == '=')
+				break;
+
+		decodedString += string(b, c);
+
+		if (c == e) // Got everything.
+		{
+			b=c;
+			break;
+		}
+
+		b=c++;
+
+		if (c == e)
+			break;
+
+		if (*c == '\r')
+			c++;
+
+		if (c == e)
+			break;
+
+		if (*c == '\n')
+		{
+			c++;
+			b=c;
+			continue;
+		}
+
+		int a1=xdigit(*c++);
+
+		if (a1 < 0)
+		{
+			b=c;
+			continue;
+		}
+
+		if (c == e)
+			break;
+
+		int a2=xdigit(*c++);
+
+		if (a2 < 0)
+		{
+			b=c;
+			continue;
+		}
+
+		decodedString += (char)(a1 * 16 + a2);
+
+		b=c;
+	}
+
+	decodeBuffer=string(b, e); // Leftovers
+
+	decoded(decodedString);
+}
+
+#if 0
+
+class testqp : public mail::decodeqp {
+
+	void decoded(string buffer)
+	{
+		cout << buffer;
+	}
+};
+
+int main(int argc, char **argv)
+{
+	testqp qp;
+
+	int argn;
+
+	for (argn=1; argn < argc; argn++)
+	{
+		string s=argv[argn];
+
+		size_t p;
+
+		while ((p=s.find('~')) != std::string::npos)
+			s[p]='\n';
+
+		qp.decode(s);
+	}
+
+	cout << endl;
+
+	return (0);
+}
+#endif