1 files changed, 75 insertions, 0 deletions
diff --git a/src/org/tukaani/xz/lzma/State.java b/src/org/tukaani/xz/lzma/State.java
new file mode 100644
index 0000000..0ece860
--- /dev/null
+++ b/src/org/tukaani/xz/lzma/State.java
@@ -0,0 +1,75 @@
+/*
+ * State
+ *
+ * Authors: Lasse Collin <lasse.collin@tukaani.org>
+ *          Igor Pavlov <http://7-zip.org/>
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+package org.tukaani.xz.lzma;
+
+final class State {
+    static final int STATES = 12;
+
+    private static final int LIT_STATES = 7;
+
+    private static final int LIT_LIT = 0;
+    private static final int MATCH_LIT_LIT = 1;
+    private static final int REP_LIT_LIT = 2;
+    private static final int SHORTREP_LIT_LIT = 3;
+    private static final int MATCH_LIT = 4;
+    private static final int REP_LIT = 5;
+    private static final int SHORTREP_LIT = 6;
+    private static final int LIT_MATCH = 7;
+    private static final int LIT_LONGREP = 8;
+    private static final int LIT_SHORTREP = 9;
+    private static final int NONLIT_MATCH = 10;
+    private static final int NONLIT_REP = 11;
+
+    private int state;
+
+    State() {}
+
+    State(State other) {
+        state = other.state;
+    }
+
+    void reset() {
+        state = LIT_LIT;
+    }
+
+    int get() {
+        return state;
+    }
+
+    void set(State other) {
+        state = other.state;
+    }
+
+    void updateLiteral() {
+        if (state <= SHORTREP_LIT_LIT)
+            state = LIT_LIT;
+        else if (state <= LIT_SHORTREP)
+            state -= 3;
+        else
+            state -= 6;
+    }
+
+    void updateMatch() {
+        state = state < LIT_STATES ? LIT_MATCH : NONLIT_MATCH;
+    }
+
+    void updateLongRep() {
+        state = state < LIT_STATES ? LIT_LONGREP : NONLIT_REP;
+    }
+
+    void updateShortRep() {
+        state = state < LIT_STATES ? LIT_SHORTREP : NONLIT_REP;
+    }
+
+    boolean isLiteral() {
+        return state < LIT_STATES;
+    }
+}