Move code in src

src/common.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <stdlib.h>
+#include <stdint.h>
+
+#define COUNT(x) (sizeof(x)/sizeof(x[0]))
+
+#define ALIGN_SIZE     (1<<4)
+#define ALIGN_MASK     (ALIGN_SIZE-1)
+
+#define ALIGN(x)       (((x)+ALIGN_MASK)&~ALIGN_MASK)
+#define ALIGN_DOWN(x)  ((x)&~ALIGN_MASK)
+
+#define PALIGN(x)      ((void *)ALIGN((size_t)(x)))
+#define PALIGN_DOWN(x) ((void *)ALIGN_DOWN((size_t)(x)))
+
+#define _unused_       __attribute__((unused))
+
+typedef struct buffer buffer_t;
+
+struct buffer {
+    uint8_t *data;
+    uint8_t *read;
+    uint8_t *write;
+    uint8_t *end;
+};