Implement maximum SSO space possible

Save up to 12 chars (11 + \0) in String itself by using the terminating
\0 in the inline string as a flag to identify if this is a SSO or a heap
string.

Fix DOS endlines present in StreamString, for some reason.

Author: earlephilhower

cores/esp8266/StreamString.cpp

@@ -1,66 +1,66 @@
-/**
- StreamString.cpp
-
- Copyright (c) 2015 Markus Sattler. All rights reserved.
- This file is part of the esp8266 core for Arduino environment.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-
- */
-
-#include <Arduino.h>
-#include "StreamString.h"
-
-size_t StreamString::write(const uint8_t *data, size_t size) {
-    if(size && data) {
-        if(reserve(length() + size + 1)) {
-            memcpy((void *) (wbuffer() + len), (const void *) data, size);
-            len += size;
-            *(wbuffer() + len) = 0x00; // add null for string end
-            return size;
-        }
-    }
-    return 0;
-}
-
-size_t StreamString::write(uint8_t data) {
-    return concat((char) data);
-}
-
-int StreamString::available() {
-    return length();
-}
-
-int StreamString::read() {
-    if(length()) {
-        char c = charAt(0);
-        remove(0, 1);
-        return c;
-
-    }
-    return -1;
-}
-
-int StreamString::peek() {
-    if(length()) {
-        char c = charAt(0);
-        return c;
-    }
-    return -1;
-}
-
-void StreamString::flush() {
-}
-
+/**
+ StreamString.cpp
+
+ Copyright (c) 2015 Markus Sattler. All rights reserved.
+ This file is part of the esp8266 core for Arduino environment.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ */
+
+#include <Arduino.h>
+#include "StreamString.h"
+
+size_t StreamString::write(const uint8_t *data, size_t size) {
+    if(size && data) {
+        if(reserve(length() + size + 1)) {
+            memcpy((void *) (wbuffer() + len()), (const void *) data, size);
+            setLen(len() + size);
+            *(wbuffer() + len()) = 0x00; // add null for string end
+            return size;
+        }
+    }
+    return 0;
+}
+
+size_t StreamString::write(uint8_t data) {
+    return concat((char) data);
+}
+
+int StreamString::available() {
+    return length();
+}
+
+int StreamString::read() {
+    if(length()) {
+        char c = charAt(0);
+        remove(0, 1);
+        return c;
+
+    }
+    return -1;
+}
+
+int StreamString::peek() {
+    if(length()) {
+        char c = charAt(0);
+        return c;
+    }
+    return -1;
+}
+
+void StreamString::flush() {
+}
+