[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/).

1 files changed, 36 insertions, 0 deletions

diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/os_std_access.go b/vendor/github.com/ncruces/go-sqlite3/vfs/os_std_access.go
new file mode 100644
index 000000000..1621c0998
--- /dev/null
+++ b/vendor/github.com/ncruces/go-sqlite3/vfs/os_std_access.go
@@ -0,0 +1,36 @@
+//go:build !unix || sqlite3_nosys
+
+package vfs
+
+import (
+	"io/fs"
+	"os"
+)
+
+func osAccess(path string, flags AccessFlag) error {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return err
+	}
+	if flags == ACCESS_EXISTS {
+		return nil
+	}
+
+	const (
+		S_IREAD  = 0400
+		S_IWRITE = 0200
+		S_IEXEC  = 0100
+	)
+
+	var want fs.FileMode = S_IREAD
+	if flags == ACCESS_READWRITE {
+		want |= S_IWRITE
+	}
+	if fi.IsDir() {
+		want |= S_IEXEC
+	}
+	if fi.Mode()&want != want {
+		return fs.ErrPermission
+	}
+	return nil
+}