Copy first batch of material from libstd to libcore.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
new file mode 100644
index 00000000000..0372b17cdf1
--- /dev/null
+++ b/src/libcore/ptr.rs
@@ -0,0 +1,52 @@
+/*
+Module: ptr
+
+Unsafe pointer utility functions
+*/
+#[abi = "rust-intrinsic"]
+native mod rusti {
+    fn addr_of<T>(val: T) -> *T;
+    fn ptr_offset<T>(ptr: *T, count: uint) -> *T;
+}
+
+/*
+Function: addr_of
+
+Get an unsafe pointer to a value
+*/
+fn addr_of<T>(val: T) -> *T { ret rusti::addr_of(val); }
+
+/*
+Function: mut_addr_of
+
+Get an unsafe mutable pointer to a value
+*/
+fn mut_addr_of<T>(val: T) -> *mutable T unsafe {
+    ret unsafe::reinterpret_cast(rusti::addr_of(val));
+}
+
+/*
+Function: offset
+
+Calculate the offset from a pointer
+*/
+fn offset<T>(ptr: *T, count: uint) -> *T {
+    ret rusti::ptr_offset(ptr, count);
+}
+
+/*
+Function: mut_offset
+
+Calculate the offset from a mutable pointer
+*/
+fn mut_offset<T>(ptr: *mutable T, count: uint) -> *mutable T {
+    ret rusti::ptr_offset(ptr as *T, count) as *mutable T;
+}
+
+
+/*
+Function: null
+
+Create an unsafe null pointer
+*/
+fn null<T>() -> *T unsafe { ret unsafe::reinterpret_cast(0u); }