X-Git-Url: http://nitlanguage.org

diff --git a/lib/c.nit b/lib/c.nit
index 04f7b20..076ea65 100644
--- a/lib/c.nit
+++ b/lib/c.nit
@@ -14,10 +14,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Utilities and performant structure for the FFI with C
+# Structures and services for compatibility with the C language
 module c
-import standard
-intrude import standard::collection::array
+
+import core
+intrude import core::collection::array
 
 # A thin wrapper around a `NativeCArray` adding length information
 abstract class CArray[E]
@@ -92,8 +93,8 @@ class CIntArray
 		super size
 	end
 
-	# Build from an `Array[Int]`
-	new from(array: Array[Int])
+	# Create from a `SequenceRead[Int]`
+	new from(array: SequenceRead[Int])
 	do
 		var carray = new CIntArray(array.length)
 		for i in array.length.times do
@@ -117,6 +118,42 @@ extern class NativeCIntArray `{ int* `}
 	redef fun +(offset) `{ return self + offset; `}
 end
 
+# Wrapper of a C array of type `uint16_t*` with length and destroy state
+class CUInt16Array
+	super CArray[Int]
+	redef type NATIVE: NativeCUInt16Array
+
+	# Initialize a new CIntArray of `size` elements.
+	init(size: Int) is old_style_init do
+		native_array = new NativeCUInt16Array(size)
+		super size
+	end
+
+	# Create from a `SequenceRead[Int]`
+	new from(array: SequenceRead[Int])
+	do
+		var carray = new CUInt16Array(array.length)
+		for i in array.length.times do
+			carray[i] = array[i]
+		end
+		return carray
+	end
+end
+
+# An array of `uint16_t` in C
+extern class NativeCUInt16Array `{ uint16_t* `}
+	super NativeCArray
+	redef type E: Int
+
+	# Initialize a new NativeCUInt16Array of `size` elements.
+	new(size: Int) `{ return calloc(size, sizeof(uint16_t)); `}
+
+	redef fun [](index) `{ return self[index]; `}
+	redef fun []=(index, val) `{ self[index] = val; `}
+
+	redef fun +(offset) `{ return self + offset; `}
+end
+
 # Wrapper around an array of `unsigned char` in C (`unsigned char*`) with length and destroy state
 class CByteArray
 	super CArray[Byte]
@@ -128,7 +165,7 @@ class CByteArray
 		super size
 	end
 
-	# Build from a `SequenceRead[Byte]`
+	# Create from a `SequenceRead[Byte]`
 	new from(array: SequenceRead[Byte])
 	do
 		var carray = new CByteArray(array.length)
@@ -137,6 +174,18 @@ class CByteArray
 		end
 		return carray
 	end
+
+	# Safely move `n` bytes from `dst_offset` to `src_offset`, inside this array
+	#
+	# Require: all arguments greater than 0 and ranges within `length`
+	fun move(dst_offset, src_offset, n: Int)
+	do
+		assert dst_offset >= 0 and src_offset >= 0 and n >= 0
+		assert dst_offset + n <= length
+		assert src_offset + n <= length
+
+		native_array.move(dst_offset, src_offset, n)
+	end
 end
 
 # An array of `unsigned char` in C (`unsigned char*`)
@@ -151,6 +200,11 @@ extern class NativeCByteArray `{ unsigned char* `}
 	redef fun []=(index, val) `{ self[index] = val; `}
 
 	redef fun +(offset) `{ return self + offset; `}
+
+	# Move `n` bytes from `dst_offset` to `src_offset`
+	fun move(dst_offset, src_offset, n: Int) `{
+		memmove(self+dst_offset, self+src_offset, n);
+	`}
 end
 
 # Wrapper around an array of `NativeString` in C (`char**`) with length and destroy state.
@@ -165,8 +219,8 @@ class CNativeStringArray
 		super size
 	end
 
-	# Build from an `Array[NativeString]`
-	new from(array: Array[NativeString])
+	# Create from an `SequenceRead[NativeString]`
+	new from(array: SequenceRead[NativeString])
 	do
 		var carray = new CNativeStringArray(array.length)
 		for i in array.length.times do