Merge chamnit/v0_7 with grbl/master

nuts_bolts.c

@@ -0,0 +1,38 @@
+/*
+  nuts_bolts.c - Shared functions
+  Part of Grbl
+
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
+
+  Grbl is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Grbl 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "nuts_bolts.h"
+#include <stdint.h>
+#include <stdlib.h>
+
+int read_double(char *line, uint8_t *char_counter, double *double_ptr)                  
+{
+  char *start = line + *char_counter;
+  char *end;
+  
+  *double_ptr = strtod(start, &end);
+  if(end == start) { 
+    return(false); 
+  };
+
+  *char_counter = end - line;
+  return(true);
+}
+