patch_wstring_cpp.txt

+++ WString.cpp	
@@ -35,6 +35,12 @@
   if (cstr) copy(cstr, length);
 }
 
+String::String(const __FlashStringHelper *pstr)
+{
+	init();
+	*this = pstr;
+}
+
 String::String(const String &value)
 {
   init();
@@ -191,6 +197,17 @@
   return *this;
 }
 
+String & String::copy(const __FlashStringHelper *pstr, unsigned int length)
+{
+	if (!reserve(length)) {
+		invalidate();
+		return *this;
+	}
+	len = length;
+	strcpy_P(buffer, (PGM_P)pstr);
+	return *this;
+}
+
 #ifdef __GXX_EXPERIMENTAL_CXX0X__
 void String::move(String &rhs)
 {
@@ -237,6 +254,14 @@
   return *this;
 }
 
+String & String::operator = (const __FlashStringHelper *pstr)
+{
+	if (pstr) copy(pstr, strlen_P((PGM_P)pstr));
+	else invalidate();
+
+	return *this;
+}
+
 /*********************************************/
 /*  concat                                   */
 /*********************************************/
@@ -320,6 +345,18 @@
 	return concat(string, strlen(string));
 }
 
+unsigned char String::concat(const __FlashStringHelper * str)
+{
+	if (!str) return 0;
+	int length = strlen_P((const char *) str);
+	if (length == 0) return 1;
+	unsigned int newlen = len + length;
+	if (!reserve(newlen)) return 0;
+	strcpy_P(buffer + len, (const char *) str);
+	len = newlen;
+	return 1;
+}
+
 /*********************************************/
 /*  Concatenate                              */
 /*********************************************/
@@ -394,6 +431,13 @@
 	return a;
 }
 
+StringSumHelper & operator + (const StringSumHelper &lhs, const __FlashStringHelper *rhs)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(rhs))	a.invalidate();
+	return a;
+}
+
 /*********************************************/
 /*  Comparison                               */
 /*********************************************/