Printing tchar array as unicode string rust winapi - winapi

Question

I'm using the winapi to grab a list of the current processes running on the system, here's my code:
use winapi::um::tlhelp32::{Process32Next, Process32First, CreateToolhelp32Snapshot, TH32CS_SNAPPROCESS, PROCESSENTRY32};
use winapi::um::winnt::HANDLE;
use winapi::um::handleapi::CloseHandle;
use std::mem::size_of;
...
fn get_processes() {
let h_process_snap: HANDLE;
// really, rust?
let mut pe32 = &mut PROCESSENTRY32{
dwSize: 0,
cntUsage: 0,
th32ProcessID: 0,
th32DefaultHeapID: 0,
th32ModuleID: 0,
cntThreads: 0,
th32ParentProcessID: 0,
pcPriClassBase: 0,
dwFlags: 0,
szExeFile: [0; 260],
};
unsafe {
h_process_snap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
}
pe32.dwSize = size_of::<PROCESSENTRY32>() as u32;
unsafe {
if Process32First(h_process_snap, pe32) == 0 {
CloseHandle(h_process_snap);
println!("can't get a process snapshot");
// TODO: return
}
while Process32Next(h_process_snap, pe32) != 0 {
println!("{:?}", pe32.szExeFile);
}
}
}
...
Now I'm trying to print the actual name of the process, in C++, this can be done using cout or wcout.
When I use println!("{:?}", pe32.szExeFile);, this is what I get:
[115, 117, 112, 101, 114, 102, 52, 45, 114, 117, 115, 116, 46, 101, 120, 101, 0, 116, 46, 101, 120, 101, 0, 98, 108, 101, 83, 104, 101, 108, 108, 46, 69, 120, 112, 101, 114, 105, 101, 110, 99, 101, 115, 46, 84, 101, 120, 116, 73, 110, 112, 117, 116, 46, 73, 110, 112, 117, 116, 65, 112, 112, 46, 101, 120, 101, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
I don't really understand how to work with this, how can I print the pe32.szExeFile as a Unicode string in rust?
see also: https://docs.rs/winapi/0.3.6/winapi/um/tlhelp32/struct.PROCESSENTRY32.html

Answer 1

Thanks to #IInspectable, I used the explicit Unicode versions, e.g. Process32FirstW, and from_wide to print the values in readable format:
let os_string = OsString::from_wide(&pe32.szExeFile[..]);
// ExeFile names have a lot of trailing 0's, remove them...
let exe_files: String = os_string.into_string().unwrap().replace("\u{0}", "");
println!("{:?}", exe_files);