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use crate::FileTime;
use std::fs::{self, File, OpenOptions};
use std::io;
use std::os::windows::prelude::*;
use std::path::Path;
use std::ptr;
use windows_sys::Win32::Foundation::{FILETIME, HANDLE};
use windows_sys::Win32::Storage::FileSystem::*;
pub fn set_file_times(p: &Path, atime: FileTime, mtime: FileTime) -> io::Result<()> {
let f = OpenOptions::new()
.write(true)
.custom_flags(FILE_FLAG_BACKUP_SEMANTICS)
.open(p)?;
set_file_handle_times(&f, Some(atime), Some(mtime))
}
pub fn set_file_mtime(p: &Path, mtime: FileTime) -> io::Result<()> {
let f = OpenOptions::new()
.write(true)
.custom_flags(FILE_FLAG_BACKUP_SEMANTICS)
.open(p)?;
set_file_handle_times(&f, None, Some(mtime))
}
pub fn set_file_atime(p: &Path, atime: FileTime) -> io::Result<()> {
let f = OpenOptions::new()
.write(true)
.custom_flags(FILE_FLAG_BACKUP_SEMANTICS)
.open(p)?;
set_file_handle_times(&f, Some(atime), None)
}
pub fn set_file_handle_times(
f: &File,
atime: Option<FileTime>,
mtime: Option<FileTime>,
) -> io::Result<()> {
let atime = atime.map(to_filetime);
let mtime = mtime.map(to_filetime);
return unsafe {
let ret = SetFileTime(
f.as_raw_handle() as HANDLE,
ptr::null(),
atime
.as_ref()
.map(|p| p as *const FILETIME)
.unwrap_or(ptr::null()),
mtime
.as_ref()
.map(|p| p as *const FILETIME)
.unwrap_or(ptr::null()),
);
if ret != 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
};
fn to_filetime(ft: FileTime) -> FILETIME {
let intervals = ft.seconds() * (1_000_000_000 / 100) + ((ft.nanoseconds() as i64) / 100);
FILETIME {
dwLowDateTime: intervals as u32,
dwHighDateTime: (intervals >> 32) as u32,
}
}
}
pub fn set_symlink_file_times(p: &Path, atime: FileTime, mtime: FileTime) -> io::Result<()> {
use std::os::windows::fs::OpenOptionsExt;
let f = OpenOptions::new()
.write(true)
.custom_flags(FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS)
.open(p)?;
set_file_handle_times(&f, Some(atime), Some(mtime))
}
pub fn from_last_modification_time(meta: &fs::Metadata) -> FileTime {
from_intervals(meta.last_write_time())
}
pub fn from_last_access_time(meta: &fs::Metadata) -> FileTime {
from_intervals(meta.last_access_time())
}
pub fn from_creation_time(meta: &fs::Metadata) -> Option<FileTime> {
Some(from_intervals(meta.creation_time()))
}
fn from_intervals(ticks: u64) -> FileTime {
// Windows write times are in 100ns intervals, so do a little math to
// get it into the right representation.
FileTime {
seconds: (ticks / (1_000_000_000 / 100)) as i64,
nanos: ((ticks % (1_000_000_000 / 100)) * 100) as u32,
}
}
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