VFS error handling.

internal/util/error.go

@@ -33,8 +33,12 @@ func AssertErr() ErrorString {
 	return ErrorString(msg)
 }
 
-func ErrorCodeString(rc uint32) string {
-	switch rc {
+type errorCode interface {
+	~uint8 | ~uint16 | ~uint32 | ~int32
+}
+
+func ErrorCodeString[T errorCode](rc T) string {
+	switch uint32(rc) {
 	case ABORT_ROLLBACK:
 		return "sqlite3: abort due to ROLLBACK"
 	case ROW:
@@ -42,7 +46,7 @@ func ErrorCodeString(rc uint32) string {
 	case DONE:
 		return "sqlite3: no more rows available"
 	}
-	switch rc & 0xff {
+	switch uint8(rc) {
 	case OK:
 		return "sqlite3: not an error"
 	case ERROR:

internal/util/module.go

@@ -12,6 +12,7 @@ type ConnKey struct{}
 
 type moduleKey struct{}
 type moduleState struct {
+	sysError error
 	mmapState
 	handleState
 }
@@ -23,3 +24,15 @@ func NewContext(ctx context.Context) context.Context {
 	ctx = context.WithValue(ctx, moduleKey{}, state)
 	return ctx
 }
+
+func GetSystemError(ctx context.Context) error {
+	s := ctx.Value(moduleKey{}).(*moduleState)
+	return s.sysError
+}
+
+func SetSystemError(ctx context.Context, err error) {
+	s, ok := ctx.Value(moduleKey{}).(*moduleState)
+	if ok {
+		s.sysError = err
+	}
+}