Initial community commit

Src/external_dependencies/openmpt-trunk/include/unrar/compress.hpp

@@ -0,0 +1,59 @@
+#ifndef _RAR_COMPRESS_
+#define _RAR_COMPRESS_
+
+// Combine pack and unpack constants to class to avoid polluting global
+// namespace with numerous short names.
+class PackDef
+{
+  public:
+    // Maximum LZ match length we can encode even for short distances.
+    static const uint MAX_LZ_MATCH = 0x1001;
+
+    // We increment LZ match length for longer distances, because shortest
+    // matches are not allowed for them. Maximum length increment is 3
+    // for distances larger than 256KB (0x40000). Here we define the maximum
+    // incremented LZ match. Normally packer does not use it, but we must be
+    // ready to process it in corrupt archives.
+    static const uint MAX_INC_LZ_MATCH = MAX_LZ_MATCH + 3;
+
+    static const uint MAX3_LZ_MATCH = 0x101; // Maximum match length for RAR v3.
+    static const uint LOW_DIST_REP_COUNT = 16;
+
+    static const uint NC    = 306; /* alphabet = {0, 1, 2, ..., NC - 1} */
+    static const uint DC    = 64;
+    static const uint LDC   = 16;
+    static const uint RC    = 44;
+    static const uint HUFF_TABLE_SIZE = NC + DC + RC + LDC;
+    static const uint BC    = 20;
+
+    static const uint NC30  = 299; /* alphabet = {0, 1, 2, ..., NC - 1} */
+    static const uint DC30  = 60;
+    static const uint LDC30 = 17;
+    static const uint RC30  = 28;
+    static const uint BC30  = 20;
+    static const uint HUFF_TABLE_SIZE30 = NC30 + DC30 + RC30 + LDC30;
+
+    static const uint NC20  = 298; /* alphabet = {0, 1, 2, ..., NC - 1} */
+    static const uint DC20  = 48;
+    static const uint RC20  = 28;
+    static const uint BC20  = 19;
+    static const uint MC20  = 257;
+
+    // Largest alphabet size among all values listed above.
+    static const uint LARGEST_TABLE_SIZE = 306;
+
+    enum {
+      CODE_HUFFMAN, CODE_LZ, CODE_REPEATLZ, CODE_CACHELZ, CODE_STARTFILE,
+      CODE_ENDFILE, CODE_FILTER, CODE_FILTERDATA
+    };
+};
+
+
+enum FilterType {
+  // These values must not be changed, because we use them directly
+  // in RAR5 compression and decompression code.
+  FILTER_DELTA=0, FILTER_E8, FILTER_E8E9, FILTER_ARM, 
+  FILTER_AUDIO, FILTER_RGB, FILTER_ITANIUM, FILTER_PPM, FILTER_NONE
+};
+
+#endif