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