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std: fix error.Unexpected on certain Windows file operations

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Closes #23690.
This commit is contained in:
HydroH 2025-05-08 16:30:33 +08:00 • committed by Alex Rønne Petersen
parent 10bf6964ed
commit 32bf1fbf46
1 changed files with 14 additions and 1 deletions
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15
lib/std/os/windows.zig
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@ -605,6 +605,7 @@ pub const ReadFileError = error{
/// Known to be possible when:
/// - Unable to read from disconnected virtual com port (Windows)
AccessDenied,
NotOpenForReading,
Unexpected,
};
@ -638,6 +639,7 @@ pub fn ReadFile(in_hFile: HANDLE, buffer: []u8, offset: ?u64) ReadFileError!usiz
.NETNAME_DELETED => return error.ConnectionResetByPeer,
.LOCK_VIOLATION => return error.LockViolation,
.ACCESS_DENIED => return error.AccessDenied,
.INVALID_HANDLE => return error.NotOpenForReading,
else => |err| return unexpectedError(err),
}
}
@ -1152,7 +1154,10 @@ pub fn GetStdHandle(handle_id: DWORD) GetStdHandleError!HANDLE {
return handle;
}
pub const SetFilePointerError = error{Unexpected};
pub const SetFilePointerError = error{
Unseekable,
Unexpected,
};
/// The SetFilePointerEx function with the `dwMoveMethod` parameter set to `FILE_BEGIN`.
pub fn SetFilePointerEx_BEGIN(handle: HANDLE, offset: u64) SetFilePointerError!void {
@ -1162,6 +1167,8 @@ pub fn SetFilePointerEx_BEGIN(handle: HANDLE, offset: u64) SetFilePointerError!v
const ipos = @as(LARGE_INTEGER, @bitCast(offset));
if (kernel32.SetFilePointerEx(handle, ipos, null, FILE_BEGIN) == 0) {
switch (GetLastError()) {
.INVALID_FUNCTION => return error.Unseekable,
.NEGATIVE_SEEK => return error.Unseekable,
.INVALID_PARAMETER => unreachable,
.INVALID_HANDLE => unreachable,
else => |err| return unexpectedError(err),
@ -1173,6 +1180,8 @@ pub fn SetFilePointerEx_BEGIN(handle: HANDLE, offset: u64) SetFilePointerError!v
pub fn SetFilePointerEx_CURRENT(handle: HANDLE, offset: i64) SetFilePointerError!void {
if (kernel32.SetFilePointerEx(handle, offset, null, FILE_CURRENT) == 0) {
switch (GetLastError()) {
.INVALID_FUNCTION => return error.Unseekable,
.NEGATIVE_SEEK => return error.Unseekable,
.INVALID_PARAMETER => unreachable,
.INVALID_HANDLE => unreachable,
else => |err| return unexpectedError(err),
@ -1184,6 +1193,8 @@ pub fn SetFilePointerEx_CURRENT(handle: HANDLE, offset: i64) SetFilePointerError
pub fn SetFilePointerEx_END(handle: HANDLE, offset: i64) SetFilePointerError!void {
if (kernel32.SetFilePointerEx(handle, offset, null, FILE_END) == 0) {
switch (GetLastError()) {
.INVALID_FUNCTION => return error.Unseekable,
.NEGATIVE_SEEK => return error.Unseekable,
.INVALID_PARAMETER => unreachable,
.INVALID_HANDLE => unreachable,
else => |err| return unexpectedError(err),
@ -1196,6 +1207,8 @@ pub fn SetFilePointerEx_CURRENT_get(handle: HANDLE) SetFilePointerError!u64 {
var result: LARGE_INTEGER = undefined;
if (kernel32.SetFilePointerEx(handle, 0, &result, FILE_CURRENT) == 0) {
switch (GetLastError()) {
.INVALID_FUNCTION => return error.Unseekable,
.NEGATIVE_SEEK => return error.Unseekable,
.INVALID_PARAMETER => unreachable,
.INVALID_HANDLE => unreachable,
else => |err| return unexpectedError(err),