move Slice out of object-writer, to be more general

include/avian/tools/object-writer/tools.h

@@ -14,6 +14,7 @@
 #include <stdlib.h>
 
 #include <avian/util/string.h>
+#include <avian/util/slice.h>
 
 #include "avian/environment.h"
 
@@ -72,51 +73,32 @@ public:
   unsigned add(util::String str);
 };
 
-template<class T>
-class Slice {
-public:
-  T* items;
-  size_t count;
-
-  inline Slice(T* items, size_t count):
-    items(items),
-    count(count) {}
-
-  inline Slice(const Slice<T>& copy):
-    items(copy.items),
-    count(copy.count) {}
-
-  inline T* begin() {
-    return items;
-  }
-
-  inline T* end() {
-    return items + count;
-  }
-};
-
-template<class T>
-class DynamicArray : public Slice<T> {
-public:
+template <class T>
+class DynamicArray : public util::Slice<T> {
+ public:
   size_t capacity;
 
-  DynamicArray():
-    Slice<T>((T*)malloc(10 * sizeof(T)), 0),
-    capacity(10) {}
-  ~DynamicArray() {
-    free(Slice<T>::items);
+  DynamicArray() : util::Slice<T>((T*)malloc(10 * sizeof(T)), 0), capacity(10)
+  {
+  }
+  ~DynamicArray()
+  {
+    free(util::Slice<T>::items);
   }
 
-  void ensure(size_t more) {
-  if(Slice<T>::count + more > capacity) {
-    capacity = capacity * 2 + more;
-    Slice<T>::items = (T*)realloc(Slice<T>::items, capacity * sizeof(T));
+  void ensure(size_t more)
+  {
+    if (util::Slice<T>::count + more > capacity) {
+      capacity = capacity * 2 + more;
+      util::Slice<T>::items
+          = (T*)realloc(util::Slice<T>::items, capacity * sizeof(T));
+    }
   }
-}
 
-  void add(const T& item) {
+  void add(const T& item)
+  {
     ensure(1);
-    Slice<T>::items[Slice<T>::count++] = item;
+    util::Slice<T>::items[util::Slice<T>::count++] = item;
   }
 };
 
@@ -175,7 +157,11 @@ public:
     Executable = 1 << 1
   };
 
-  virtual bool writeObject(OutputStream* out, Slice<SymbolInfo> symbols, Slice<const uint8_t> data, unsigned accessFlags, unsigned alignment) = 0;
+  virtual bool writeObject(OutputStream* out,
+                           util::Slice<SymbolInfo> symbols,
+                           util::Slice<const uint8_t> data,
+                           unsigned accessFlags,
+                           unsigned alignment) = 0;
 
   static Platform* getPlatform(PlatformInfo info);
 };

include/avian/util/slice.h

@@ -0,0 +1,60 @@
+/* Copyright (c) 2008-2013, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+#ifndef AVIAN_UTIL_SLICE_H
+#define AVIAN_UTIL_SLICE_H
+
+#include "allocator.h"
+#include "math.h"
+
+namespace avian {
+namespace util {
+
+template <class T>
+class Slice {
+ public:
+  T* items;
+  size_t count;
+
+  inline Slice(T* items, size_t count) : items(items), count(count)
+  {
+  }
+
+  inline Slice(const Slice<T>& copy) : items(copy.items), count(copy.count)
+  {
+  }
+
+  inline T& operator[](size_t index)
+  {
+    return items[index];
+  }
+
+  inline T* begin()
+  {
+    return items;
+  }
+
+  inline T* end()
+  {
+    return items + count;
+  }
+
+  Slice<T> clone(Allocator* a)
+  {
+    Slice<T> ret((T*)a->allocate(count * sizeof(T)), count);
+    memcpy(ret.items, items, count * sizeof(T));
+    return ret;
+  }
+};
+
+}  // namespace util
+}  // namespace avian
+
+#endif  // AVIAN_UTIL_SLICE_H