Diff: utils.h

Revision:

1:871d3066c2ab

Child:

8:973dcd190672

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils.h	Mon May 14 17:37:26 2018 +0000
@@ -0,0 +1,43 @@
+#ifndef UTILS_H_
+#define UTILS_H_
+#include "IO.h"
+
+inline bool isWhitespace(const char& ch) {
+    return  (ch == ' ') ||
+            (ch == '\t') ||
+            (ch == '\r') ||
+            (ch == '\n') ||
+            (ch == '\v') ||
+            (ch == '\f');
+}
+
+template <typename V>
+V parseUnsignedFromSerial(const V& defaultvalue)
+{
+  V value = 0;
+  while(true) {
+    
+    int readChar = IO::getc();
+
+    // only accepts digits
+    if ((readChar >= 48) && (readChar <= 57)) {
+      value = value * 10 + (readChar - 48);
+      // continues parsing
+      
+    } else if ( isWhitespace((char)readChar) || (readChar == 59) ) {
+      // space or ';'
+      // ends parsing
+      break;
+      
+    } else {
+      IO::error("%c",(char)readChar);
+      // set value back to original
+      value = defaultvalue;
+      break;
+      
+    }
+  }
+  
+  return value;
+}
+#endif
\ No newline at end of file