1 files changed, 234 insertions, 0 deletions

diff --git a/archival/bz/bzlib_private.h b/archival/bz/bzlib_private.h
new file mode 100644
index 000000000..24ffbee9c
--- /dev/null
+++ b/archival/bz/bzlib_private.h
@@ -0,0 +1,234 @@
+/*
+ * bzip2 is written by Julian Seward <jseward@bzip.org>.
+ * Adapted for busybox by Denys Vlasenko <vda.linux@googlemail.com>.
+ * See README and LICENSE files in this directory for more information.
+ */
+
+/*-------------------------------------------------------------*/
+/*--- Private header file for the library.                  ---*/
+/*---                                       bzlib_private.h ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+This file is part of bzip2/libbzip2, a program and library for
+lossless, block-sorting data compression.
+
+bzip2/libbzip2 version 1.0.4 of 20 December 2006
+Copyright (C) 1996-2006 Julian Seward <jseward@bzip.org>
+
+Please read the WARNING, DISCLAIMER and PATENTS sections in the
+README file.
+
+This program is released under the terms of the license contained
+in the file LICENSE.
+------------------------------------------------------------------ */
+
+/* #include "bzlib.h" */
+
+#define BZ_DEBUG 0
+//#define BZ_NO_STDIO 1 - does not work
+
+
+/*-- General stuff. --*/
+
+typedef unsigned char Bool;
+typedef unsigned char UChar;
+
+#define True  ((Bool)1)
+#define False ((Bool)0)
+
+static void bz_assert_fail(int errcode) ATTRIBUTE_NORETURN;
+#define AssertH(cond, errcode) \
+{ \
+        if (!(cond)) \
+                bz_assert_fail(errcode); \
+}
+
+#if BZ_DEBUG
+#define AssertD(cond, msg) \
+{ \
+        if (!(cond)) \
+                bb_error_msg_and_die("(debug build): internal error %s", msg); \
+}
+#else
+#define AssertD(cond, msg) do { } while (0)
+#endif
+
+
+/*-- Header bytes. --*/
+
+#define BZ_HDR_B 0x42   /* 'B' */
+#define BZ_HDR_Z 0x5a   /* 'Z' */
+#define BZ_HDR_h 0x68   /* 'h' */
+#define BZ_HDR_0 0x30   /* '0' */
+
+#define BZ_HDR_BZh0 0x425a6830
+
+/*-- Constants for the back end. --*/
+
+#define BZ_MAX_ALPHA_SIZE 258
+#define BZ_MAX_CODE_LEN    23
+
+#define BZ_RUNA 0
+#define BZ_RUNB 1
+
+#define BZ_N_GROUPS 6
+#define BZ_G_SIZE   50
+#define BZ_N_ITERS  4
+
+#define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
+
+
+/*-- Stuff for randomising repetitive blocks. --*/
+
+static const int32_t BZ2_rNums[512];
+
+#define BZ_RAND_DECLS \
+        int32_t rNToGo; \
+        int32_t rTPos \
+
+#define BZ_RAND_INIT_MASK \
+        s->rNToGo = 0; \
+        s->rTPos  = 0 \
+
+#define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
+
+#define BZ_RAND_UPD_MASK \
+{ \
+        if (s->rNToGo == 0) { \
+                s->rNToGo = BZ2_rNums[s->rTPos]; \
+                s->rTPos++; \
+                if (s->rTPos == 512) s->rTPos = 0; \
+        } \
+        s->rNToGo--; \
+}
+
+
+/*-- Stuff for doing CRCs. --*/
+
+static const uint32_t BZ2_crc32Table[256];
+
+#define BZ_INITIALISE_CRC(crcVar) \
+{ \
+        crcVar = 0xffffffffL; \
+}
+
+#define BZ_FINALISE_CRC(crcVar) \
+{ \
+        crcVar = ~(crcVar); \
+}
+
+#define BZ_UPDATE_CRC(crcVar,cha) \
+{ \
+        crcVar = (crcVar << 8) ^ BZ2_crc32Table[(crcVar >> 24) ^ ((UChar)cha)]; \
+}
+
+
+/*-- States and modes for compression. --*/
+
+#define BZ_M_IDLE      1
+#define BZ_M_RUNNING   2
+#define BZ_M_FLUSHING  3
+#define BZ_M_FINISHING 4
+
+#define BZ_S_OUTPUT    1
+#define BZ_S_INPUT     2
+
+#define BZ_N_RADIX 2
+#define BZ_N_QSORT 12
+#define BZ_N_SHELL 18
+#define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
+
+
+/*-- Structure holding all the compression-side stuff. --*/
+
+typedef struct EState {
+        /* pointer back to the struct bz_stream */
+        bz_stream *strm;
+
+        /* mode this stream is in, and whether inputting */
+        /* or outputting data */
+        int32_t  mode;
+        int32_t  state;
+
+        /* remembers avail_in when flush/finish requested */
+        uint32_t avail_in_expect; //vda: do we need this?
+
+        /* for doing the block sorting */
+        uint32_t *arr1;
+        uint32_t *arr2;
+        uint32_t *ftab;
+        int32_t  origPtr;
+
+        /* aliases for arr1 and arr2 */
+        uint32_t *ptr;
+        UChar    *block;
+        uint16_t *mtfv;
+        UChar    *zbits;
+
+        /* run-length-encoding of the input */
+        uint32_t state_in_ch;
+        int32_t  state_in_len;
+        BZ_RAND_DECLS;
+
+        /* input and output limits and current posns */
+        int32_t  nblock;
+        int32_t  nblockMAX;
+        int32_t  numZ;
+        int32_t  state_out_pos;
+
+        /* the buffer for bit stream creation */
+        uint32_t bsBuff;
+        int32_t  bsLive;
+
+        /* block and combined CRCs */
+        uint32_t blockCRC;
+        uint32_t combinedCRC;
+
+        /* misc administratium */
+        int32_t  blockNo;
+        int32_t  blockSize100k;
+
+        /* stuff for coding the MTF values */
+        int32_t  nMTF;
+
+        /* map of bytes used in block */
+        int32_t  nInUse;
+        Bool     inUse[256];
+        UChar    unseqToSeq[256];
+
+        /* stuff for coding the MTF values */
+        int32_t  mtfFreq    [BZ_MAX_ALPHA_SIZE];
+        UChar    selector   [BZ_MAX_SELECTORS];
+        UChar    selectorMtf[BZ_MAX_SELECTORS];
+
+        UChar    len     [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+        int32_t  code    [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+        int32_t  rfreq   [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+#ifdef FAST_GROUP6
+        /* second dimension: only 3 needed; 4 makes index calculations faster */
+        uint32_t len_pack[BZ_MAX_ALPHA_SIZE][4];
+#endif
+} EState;
+
+
+/*-- compression. --*/
+
+static void
+BZ2_blockSort(EState*);
+
+static void
+BZ2_compressBlock(EState*, Bool);
+
+static void
+BZ2_bsInitWrite(EState*);
+
+static void
+BZ2_hbAssignCodes(int32_t*, UChar*, int32_t, int32_t, int32_t);
+
+static void
+BZ2_hbMakeCodeLengths(UChar*, int32_t*, int32_t, int32_t);
+
+/*-------------------------------------------------------------*/
+/*--- end                                   bzlib_private.h ---*/
+/*-------------------------------------------------------------*/