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Implement GetFileSizeEx compatibility wrapper #62

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Merged
seritools merged 1 commit into from
Jul 2, 2026
Merged

Implement GetFileSizeEx compatibility wrapper #62

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24 changes: 24 additions & 0 deletions library/std/src/sys/pal/windows/c.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -800,3 +800,27 @@ compat_fn_with_fallback! {
rtabort!("unimplemented")
}
}

#[cfg(target_family = "rust9x")]
compat_fn_with_fallback! {
pub static KERNEL32: &CStr = c"kernel32" => { load: false, unicows: false };
// >= 2000
// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfilesizeex
pub fn GetFileSizeEx(
hfile: HANDLE,
lpfilesize: *mut i64
) -> BOOL {
if lpfilesize.is_null() {
unsafe { SetLastError(ERROR_INVALID_PARAMETER as u32) };
return FALSE;
}
let mut high32 = 0;
let low32 = unsafe { GetFileSize(hfile, &mut high32) };
let full_size: u64 = ((high32 as u64) << 32) | (low32 as u64);
if low32 == INVALID_FILE_SIZE && unsafe { GetLastError() } != NO_ERROR {
FALSE
} else {
TRUE
}
}
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}
2 changes: 2 additions & 0 deletions library/std/src/sys/pal/windows/c/bindings.txt
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Expand Up @@ -2184,6 +2184,7 @@ GetExitCodeProcess
GetFileAttributesW
GetFileInformationByHandle
GetFileInformationByHandleEx
GetFileSize
GetFileSizeEx
GetFileType
GETFINALPATHNAMEBYHANDLE_FLAGS
Expand Down Expand Up @@ -2234,6 +2235,7 @@ InitializeProcThreadAttributeList
InitOnceBeginInitialize
InitOnceComplete
INVALID_FILE_ATTRIBUTES
INVALID_FILE_SIZE
INVALID_SET_FILE_POINTER
INVALID_SOCKET
IO_REPARSE_TAG_MOUNT_POINT
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2 changes: 2 additions & 0 deletions library/std/src/sys/pal/windows/c/windows_sys.rs
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Expand Up @@ -53,6 +53,7 @@ windows_link::link!("kernel32.dll" "system" fn GetExitCodeProcess(hprocess : HAN
windows_link::link!("kernel32.dll" "system" fn GetFileAttributesW(lpfilename : PCWSTR) -> u32);
windows_link::link!("kernel32.dll" "system" fn GetFileInformationByHandle(hfile : HANDLE, lpfileinformation : *mut BY_HANDLE_FILE_INFORMATION) -> BOOL);
windows_link::link!("kernel32.dll" "system" fn GetFileInformationByHandleEx(hfile : HANDLE, fileinformationclass : FILE_INFO_BY_HANDLE_CLASS, lpfileinformation : *mut core::ffi::c_void, dwbuffersize : u32) -> BOOL);
windows_link::link!("kernel32.dll" "system" fn GetFileSize(hfile : HANDLE, lpfilesize : *mut u64) -> u32);
windows_link::link!("kernel32.dll" "system" fn GetFileSizeEx(hfile : HANDLE, lpfilesize : *mut i64) -> BOOL);
windows_link::link!("kernel32.dll" "system" fn GetFileType(hfile : HANDLE) -> FILE_TYPE);
windows_link::link!("kernel32.dll" "system" fn GetFinalPathNameByHandleW(hfile : HANDLE, lpszfilepath : PWSTR, cchfilepath : u32, dwflags : GETFINALPATHNAMEBYHANDLE_FLAGS) -> u32);
Expand Down Expand Up @@ -2898,6 +2899,7 @@ impl Default for INIT_ONCE {
}
pub const INIT_ONCE_INIT_FAILED: u32 = 4u32;
pub const INVALID_FILE_ATTRIBUTES: u32 = 4294967295u32;
pub const INVALID_FILE_SIZE: u32 = 4294967295u32;
pub const INVALID_SET_FILE_POINTER: u32 = 4294967295u32;
pub const INVALID_SOCKET: SOCKET = -1i32 as _;
#[repr(C)]
Expand Down
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