Diff: RingBuffer.h

Revision:

8:776b8dc51932

Child:

9:850306f22153

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RingBuffer.h	Tue Jan 29 13:46:41 2013 +0000
@@ -0,0 +1,51 @@
+#ifndef RING_BUFFER_H
+#define RING_BUFFER_H
+
+#include <stdio.h>
+template <typename T, size_t SIZE>
+class RingBuffer
+{
+public:
+    RingBuffer() : head(0), tail(0) {
+    }
+
+    int writable() {
+        return head < tail ? tail - head - 1 : tail - head + (sizeof(buf) / sizeof(T)) - 1;
+    }
+
+    int readable() {
+        return tail <= head ? head - tail : head - tail + (sizeof(buf) / sizeof(T)) - 1;
+    }
+
+    T putc(T c) {
+        if (!writable())
+            return (T) -1;
+
+        buf[head] = c;
+        head = (head + 1) % (sizeof(buf) / sizeof(T));
+
+        return c;
+    }
+
+    int getc() {
+        if (readable()) {
+            T c = buf[tail];
+            tail = (tail + 1) % (sizeof(buf) / sizeof(T));
+            return c;
+        }
+        return -1;
+    }
+
+    T operator=(T c) {
+        return putc(c);
+    }
+
+    operator int() {
+        return (int) getc();
+    }
+
+    int head, tail;
+    T buf[SIZE];
+};
+
+#endif
\ No newline at end of file