From 1e7b32490dfdccddd04f46d4b0416b48d749d51b Mon Sep 17 00:00:00 2001
From: kim <89579420+NyaaaWhatsUpDoc@users.noreply.github.com>
Date: Mon, 27 May 2024 15:46:15 +0000
Subject: [experiment] add alternative wasm sqlite3 implementation available
 via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
---
 .../tetratelabs/wazero/experimental/sys/error.go   | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 vendor/github.com/tetratelabs/wazero/experimental/sys/error.go

(limited to 'vendor/github.com/tetratelabs/wazero/experimental/sys/error.go')

diff --git a/vendor/github.com/tetratelabs/wazero/experimental/sys/error.go b/vendor/github.com/tetratelabs/wazero/experimental/sys/error.go
new file mode 100644
index 000000000..a0c76019a
--- /dev/null
+++ b/vendor/github.com/tetratelabs/wazero/experimental/sys/error.go
@@ -0,0 +1,45 @@
+package sys
+
+import (
+	"io"
+	"io/fs"
+	"os"
+)
+
+// UnwrapOSError returns an Errno or zero if the input is nil.
+func UnwrapOSError(err error) Errno {
+	if err == nil {
+		return 0
+	}
+	err = underlyingError(err)
+	switch err {
+	case nil, io.EOF:
+		return 0 // EOF is not a Errno
+	case fs.ErrInvalid:
+		return EINVAL
+	case fs.ErrPermission:
+		return EPERM
+	case fs.ErrExist:
+		return EEXIST
+	case fs.ErrNotExist:
+		return ENOENT
+	case fs.ErrClosed:
+		return EBADF
+	}
+	return errorToErrno(err)
+}
+
+// underlyingError returns the underlying error if a well-known OS error type.
+//
+// This impl is basically the same as os.underlyingError in os/error.go
+func underlyingError(err error) error {
+	switch err := err.(type) {
+	case *os.PathError:
+		return err.Err
+	case *os.LinkError:
+		return err.Err
+	case *os.SyscallError:
+		return err.Err
+	}
+	return err
+}
-- 
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