1 files changed, 37 insertions, 15 deletions

diff --git a/ByteBuffer.h b/ByteBuffer.h
index 828ee4b..ee54a0a 100644
--- a/ByteBuffer.h
+++ b/ByteBuffer.h
@@ -6,6 +6,9 @@
 #include <string>
 #include <stdexcept>
 
+// For now
+#include "log.h"
+
 class ByteBufferException : public std::runtime_error {
 public:
     ByteBufferException(std::string const &what) : std::runtime_error(what) {
@@ -14,22 +17,31 @@ public:
 
 class ByteBuffer {
 public:
-    ByteBuffer(uint8_t *bytes, size_t capacity, size_t size, size_t zero = 0);
+    ByteBuffer(uint8_t *bytes, size_t capacity);
+
+    ByteBuffer(uint8_t *bytes, size_t capacity, size_t zero, size_t size);
 
-    inline size_t getSize() {
-        return size;
+    inline size_t getSize() const {
+        DF << "end=" << (uint64_t)end << ", zero=" << (uint64_t)zero;
+        return end - zero;
     }
 
-    inline size_t getCapacity() {
+    inline size_t getCapacity() const {
         return capacity;
     }
 
-    inline size_t getCursor() {
-        return cursor;
+    inline size_t getCursor() const {
+        return ptr - zero;
     }
 
     inline void setCursor(size_t newCursor) {
-        cursor = newCursor;
+        assertCanAccessRelative(newCursor);
+        ptr = ptr + newCursor;
+    }
+
+    inline void skip(size_t length) {
+        checkAndUpdateEnd(length);
+        ptr += length;
     }
 
     ByteBuffer &add8(uint8_t value);
@@ -44,20 +56,30 @@ public:
 
     void copy(uint8_t *bytes, size_t length);
 
-    ByteBuffer view(size_t length);
+    /**
+    * Creates a view from cursor to size.
+    */
+    ByteBuffer view() const;
+
+    // TODO: should return const
+    ByteBuffer view(size_t length) const;
 
     std::string toString() const;
 
 private:
-    void checkAndUpdateSize(size_t count);
+    ByteBuffer(const uint8_t *bytes, size_t capacity, uint8_t *zero, uint8_t *end);
+
+    void checkAndUpdateEnd(size_t count);
+
+    void assertCanAccessRelative(size_t diff) const;
 
-    void canAccessIndex(size_t count);
+    void assertCanAccessIndex(uint8_t *p) const;
 
-    uint8_t *bytes;
-    size_t zero;
-    size_t size;
-    size_t capacity;
-    size_t cursor;
+    const uint8_t *bytes;
+    const size_t capacity;
+    const uint8_t *zero;
+    const uint8_t *end;
+    uint8_t *ptr;
 };
 
 #endif