firehazard 0.0.0-2022-09-10

/// \[[docs.microsoft.com](https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-lookupprivilegevaluea)\] LookupPrivilegeValueA
pub fn lookup_privilege_value_a(name: impl abistr::AsCStr) -> Result<crate::privilege::Luid, crate::Error> {
    use crate::*;
    let name = name.as_cstr();
    let mut luid = Luid::from(0u64);
    Error::get_last_if(0 == unsafe { winapi::um::winbase::LookupPrivilegeValueA(core::ptr::null_mut(), name, &mut luid.0) })?;
    Ok(privilege::Luid(luid))
}

/// \[[docs.microsoft.com](https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-lookupprivilegenamea)\] LookupPrivilegeNameA
#[cfg(std)] pub fn lookup_privilege_name_a(mut luid: crate::privilege::Luid) -> Result<std::string::String, crate::Error> {
    use crate::*;
    use winapi::shared::winerror::*;
    use winapi::um::winbase::LookupPrivilegeNameA;
    use std::ptr::null_mut;

    let system_name = null_mut();
    let luid = &mut luid.0.0;
    let mut len = 0;
    Error::get_last_if(0 == unsafe { LookupPrivilegeNameA(system_name, luid, null_mut(), &mut len) }).unerr(ERROR_INSUFFICIENT_BUFFER, ())?;
    let mut buf = std::vec![0u8; usize::from32(len)];
    Error::get_last_if(0 == unsafe { LookupPrivilegeNameA(system_name, luid, buf.as_mut_ptr().cast(), &mut len) })?;
    buf.shrink_to(usize::from32(len)); // on the off chance that len shrunk (if it grew, we would've already returned `Error(ERROR_INSUFFICIENT_BUFFER)`)
    assert!(buf.pop() == Some(b'\0'), "BUG: privilege name was expected to be null terminated");
    std::string::String::from_utf8(buf).map_err(|_| Error(ERROR_INVALID_DATA))
}

#[cfg(not(std))] pub(crate) fn lookup_privilege_name_a(_luid: crate::privilege::Luid) -> Result<&'static str, crate::Error> { Err(crate::Error(winapi::shared::winerror::ERROR_OUTOFMEMORY)) }