1 files changed, 59 insertions, 0 deletions
diff --git a/java_jni/org/jau/io/IOStateFunc.java b/java_jni/org/jau/io/IOStateFunc.java
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+/**
+ * Author: Sven Gothel <[email protected]>
+ * Copyright (c) 2022 Gothel Software e.K.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package org.jau.io;
+
+/**
+ * Supporting std::basic_ios's iostate functionality for all ByteInStream implementations.
+ */
+public interface IOStateFunc {
+
+    /** Clears state flags by assignment to the given value. */
+    void clear(final IOState state);
+
+    /**
+     * Returns the current state flags.
+     *
+     * Method is marked `virtual` to allow implementations with asynchronous resources
+     * to determine or update the current iostate.
+     *
+     * Method is used throughout all query members and setstate(),
+     * hence they all will use the updated state from a potential override implementation.
+     */
+    IOState rdState();
+
+    /** Sets state flags, by keeping its previous bits. */
+    void setState(final IOState state);
+
+    /** Checks if no error nor eof() has occurred i.e. I/O operations are available. */
+    boolean good();
+
+    /** Checks if end-of-file has been reached. */
+    boolean eof();
+
+    /** Checks if an error has occurred. */
+    boolean fail();
+
+    /** Checks if a non-recoverable error has occurred. */
+    boolean bad();
+}