# 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 core
intrude import core::collection::array
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
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]
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)
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*`)
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.
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