1 files changed, 76 insertions, 0 deletions
diff --git a/src/libstd/sys/windows/args.rs b/src/libstd/sys/windows/args.rs
new file mode 100644
index 00000000000..aa61f9adb82
--- /dev/null
+++ b/src/libstd/sys/windows/args.rs
@@ -0,0 +1,76 @@
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![allow(dead_code)] // runtime init functions not used during testing
+
+use os::windows::prelude::*;
+use sys::c;
+use slice;
+use ops::Range;
+use ffi::OsString;
+use libc::{c_int, c_void};
+
+pub unsafe fn init(_argc: isize, _argv: *const *const u8) { }
+
+pub unsafe fn cleanup() { }
+
+pub fn args() -> Args {
+    unsafe {
+        let mut nArgs: c_int = 0;
+        let lpCmdLine = c::GetCommandLineW();
+        let szArgList = c::CommandLineToArgvW(lpCmdLine, &mut nArgs);
+
+        // szArcList can be NULL if CommandLinToArgvW failed,
+        // but in that case nArgs is 0 so we won't actually
+        // try to read a null pointer
+        Args { cur: szArgList, range: 0..(nArgs as isize) }
+    }
+}
+
+pub struct Args {
+    range: Range<isize>,
+    cur: *mut *mut u16,
+}
+
+unsafe fn os_string_from_ptr(ptr: *mut u16) -> OsString {
+    let mut len = 0;
+    while *ptr.offset(len) != 0 { len += 1; }
+
+    // Push it onto the list.
+    let ptr = ptr as *const u16;
+    let buf = slice::from_raw_parts(ptr, len as usize);
+    OsStringExt::from_wide(buf)
+}
+
+impl Iterator for Args {
+    type Item = OsString;
+    fn next(&mut self) -> Option<OsString> {
+        self.range.next().map(|i| unsafe { os_string_from_ptr(*self.cur.offset(i)) } )
+    }
+    fn size_hint(&self) -> (usize, Option<usize>) { self.range.size_hint() }
+}
+
+impl DoubleEndedIterator for Args {
+    fn next_back(&mut self) -> Option<OsString> {
+        self.range.next_back().map(|i| unsafe { os_string_from_ptr(*self.cur.offset(i)) } )
+    }
+}
+
+impl ExactSizeIterator for Args {
+    fn len(&self) -> usize { self.range.len() }
+}
+
+impl Drop for Args {
+    fn drop(&mut self) {
+        // self.cur can be null if CommandLineToArgvW previously failed,
+        // but LocalFree ignores NULL pointers
+        unsafe { c::LocalFree(self.cur as *mut c_void); }
+    }
+}