src/libstd/sys/windows/ext/fs.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 //! Windows-specific extensions for the primitives in `std::fs`
  12
  13 #![stable(feature = "rust1", since = "1.0.0")]
  14
  15 use prelude::v1::*;
  16
  17 use fs::{OpenOptions, Metadata};
  18 use io;
  19 use path::Path;
  20 use sys;
  21 use sys_common::{AsInnerMut, AsInner};
  22
  23 /// Windows-specific extensions to `OpenOptions`
  24 #[unstable(feature = "open_options_ext",
  25            reason = "may require more thought/methods")]
  26 pub trait OpenOptionsExt {
  27     /// Overrides the `dwDesiredAccess` argument to the call to `CreateFile`
  28     /// with the specified value.
  29     fn desired_access(&mut self, access: i32) -> &mut Self;
  30
  31     /// Overrides the `dwCreationDisposition` argument to the call to
  32     /// `CreateFile` with the specified value.
  33     ///
  34     /// This will override any values of the standard `create` flags, for
  35     /// example.
  36     fn creation_disposition(&mut self, val: i32) -> &mut Self;
  37
  38     /// Overrides the `dwFlagsAndAttributes` argument to the call to
  39     /// `CreateFile` with the specified value.
  40     ///
  41     /// This will override any values of the standard flags on the
  42     /// `OpenOptions` structure.
  43     fn flags_and_attributes(&mut self, val: i32) -> &mut Self;
  44
  45     /// Overrides the `dwShareMode` argument to the call to `CreateFile` with
  46     /// the specified value.
  47     ///
  48     /// This will override any values of the standard flags on the
  49     /// `OpenOptions` structure.
  50     fn share_mode(&mut self, val: i32) -> &mut Self;
  51 }
  52
  53 impl OpenOptionsExt for OpenOptions {
  54     fn desired_access(&mut self, access: i32) -> &mut OpenOptions {
  55         self.as_inner_mut().desired_access(access); self
  56     }
  57     fn creation_disposition(&mut self, access: i32) -> &mut OpenOptions {
  58         self.as_inner_mut().creation_disposition(access); self
  59     }
  60     fn flags_and_attributes(&mut self, access: i32) -> &mut OpenOptions {
  61         self.as_inner_mut().flags_and_attributes(access); self
  62     }
  63     fn share_mode(&mut self, access: i32) -> &mut OpenOptions {
  64         self.as_inner_mut().share_mode(access); self
  65     }
  66 }
  67
  68 /// Extension methods for `fs::Metadata` to access the raw fields contained
  69 /// within.
  70 #[stable(feature = "metadata_ext", since = "1.1.0")]
  71 pub trait MetadataExt {
  72     /// Returns the value of the `dwFileAttributes` field of this metadata.
  73     ///
  74     /// This field contains the file system attribute information for a file
  75     /// or directory.
  76     #[stable(feature = "metadata_ext", since = "1.1.0")]
  77     fn file_attributes(&self) -> u32;
  78
  79     /// Returns the value of the `ftCreationTime` field of this metadata.
  80     ///
  81     /// The returned 64-bit value represents the number of 100-nanosecond
  82     /// intervals since January 1, 1601 (UTC).
  83     #[stable(feature = "metadata_ext", since = "1.1.0")]
  84     fn creation_time(&self) -> u64;
  85
  86     /// Returns the value of the `ftLastAccessTime` field of this metadata.
  87     ///
  88     /// The returned 64-bit value represents the number of 100-nanosecond
  89     /// intervals since January 1, 1601 (UTC).
  90     #[stable(feature = "metadata_ext", since = "1.1.0")]
  91     fn last_access_time(&self) -> u64;
  92
  93     /// Returns the value of the `ftLastWriteTime` field of this metadata.
  94     ///
  95     /// The returned 64-bit value represents the number of 100-nanosecond
  96     /// intervals since January 1, 1601 (UTC).
  97     #[stable(feature = "metadata_ext", since = "1.1.0")]
  98     fn last_write_time(&self) -> u64;
  99
 100     /// Returns the value of the `nFileSize{High,Low}` fields of this
 101     /// metadata.
 102     ///
 103     /// The returned value does not have meaning for directories.
 104     #[stable(feature = "metadata_ext", since = "1.1.0")]
 105     fn file_size(&self) -> u64;
 106 }
 107
 108 #[stable(feature = "metadata_ext", since = "1.1.0")]
 109 impl MetadataExt for Metadata {
 110     fn file_attributes(&self) -> u32 { self.as_inner().attrs() }
 111     fn creation_time(&self) -> u64 { self.as_inner().created() }
 112     fn last_access_time(&self) -> u64 { self.as_inner().accessed() }
 113     fn last_write_time(&self) -> u64 { self.as_inner().modified() }
 114     fn file_size(&self) -> u64 { self.as_inner().size() }
 115 }
 116
 117 /// Creates a new file symbolic link on the filesystem.
 118 ///
 119 /// The `dst` path will be a file symbolic link pointing to the `src`
 120 /// path.
 121 ///
 122 /// # Examples
 123 ///
 124 /// ```ignore
 125 /// use std::os::windows::fs;
 126 ///
 127 /// # fn foo() -> std::io::Result<()> {
 128 /// try!(fs::symlink_file("a.txt", "b.txt"));
 129 /// # Ok(())
 130 /// # }
 131 /// ```
 132 #[stable(feature = "rust1", since = "1.0.0")]
 133 pub fn symlink_file<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q)
 134                                                     -> io::Result<()> {
 135     sys::fs::symlink_inner(src.as_ref(), dst.as_ref(), false)
 136 }
 137
 138 /// Creates a new directory symlink on the filesystem.
 139 ///
 140 /// The `dst` path will be a directory symbolic link pointing to the `src`
 141 /// path.
 142 ///
 143 /// # Examples
 144 ///
 145 /// ```ignore
 146 /// use std::os::windows::fs;
 147 ///
 148 /// # fn foo() -> std::io::Result<()> {
 149 /// try!(fs::symlink_file("a", "b"));
 150 /// # Ok(())
 151 /// # }
 152 /// ```
 153 #[stable(feature = "rust1", since = "1.0.0")]
 154 pub fn symlink_dir<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q)
 155                                                    -> io::Result<()> {
 156     sys::fs::symlink_inner(src.as_ref(), dst.as_ref(), true)
 157 }