switch to multi-module project structure

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/src/main/kotlin/FileMode.kt b/lib/src/main/kotlin/FileMode.kt
new file mode 100644
index 0000000..81712e6
--- /dev/null
+++ b/lib/src/main/kotlin/FileMode.kt
@@ -0,0 +1,32 @@
+/**
+ * The mode in which to open or create a file. For directories, it's illegal for directories to be written, truncated,
+ * or removed on close.
+ *
+ * @param mode The actual mode, as described by the [Mode] enum class.
+ * @param truncate Set or unset the truncation bit. It requires the write permission.
+ * @param removeClose Set or unset the "remove on close" bit. It requires the remove permission in the parent directory.
+ */
+data class FileMode(val mode: Mode, val truncate: Boolean, val removeClose: Boolean) {
+    enum class Mode(val value: UByte) {
+        READ(0u),
+        WRITE(1u),
+        READ_WRITE(2u),
+        EXECUTE(3u)
+    }
+
+    /**
+     * Turn the mode described by the [FileMode] fields into a mode byte.
+     */
+    fun toModeByte(): UByte {
+        var byte: UByte = 0u
+        byte = byte.or(this.mode.value)
+        if (truncate) {
+            byte = byte.or(0x10u)
+        }
+        if (removeClose) {
+            byte = byte.or(0x40u)
+        }
+
+        return byte
+    }
+}
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