From 56f232e5fc76801d6d6872a1bbc4f67ba93c8095 Mon Sep 17 00:00:00 2001
From: Feoramund <161657516+Feoramund@users.noreply.github.com>
Date: Sun, 25 Aug 2024 23:52:33 -0400
Subject: [PATCH] Report invalid whence & offset on `os2` Windows

---
 core/os/os2/errors_windows.odin | 3 +++
 core/os/os2/file_windows.odin   | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/core/os/os2/errors_windows.odin b/core/os/os2/errors_windows.odin
index 6748c1167..8a9a47ca6 100644
--- a/core/os/os2/errors_windows.odin
+++ b/core/os/os2/errors_windows.odin
@@ -52,6 +52,9 @@ _get_platform_error :: proc() -> Error {
 	case win32.ERROR_INVALID_HANDLE:
 		return .Invalid_File
 
+	case win32.ERROR_NEGATIVE_SEEK:
+		return .Invalid_Offset
+
 	case
 		win32.ERROR_BAD_ARGUMENTS,
 		win32.ERROR_INVALID_PARAMETER,
diff --git a/core/os/os2/file_windows.odin b/core/os/os2/file_windows.odin
index dd22ce29f..2f551c49a 100644
--- a/core/os/os2/file_windows.odin
+++ b/core/os/os2/file_windows.odin
@@ -248,6 +248,8 @@ _seek :: proc(f: ^File_Impl, offset: i64, whence: io.Seek_From) -> (ret: i64, er
 	case .Start:   w = win32.FILE_BEGIN
 	case .Current: w = win32.FILE_CURRENT
 	case .End:     w = win32.FILE_END
+	case:
+		return 0, .Invalid_Whence
 	}
 	hi := i32(offset>>32)
 	lo := i32(offset)