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bzip2: Support compression for sandbox
Add the missing code to allow bzip2 compression to be used. This is useful for sandbox tests. These files are taken from the bzip2 1.0.6 release. The license text is copied to the top of each file as is done with other bzip2 files in U-Boot. The only other change is to squash a compiler warning with nBytes. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Simon Glass
parent
20af3c0a00
commit
cf20452832
4 changed files with 1852 additions and 0 deletions
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@ -68,7 +68,10 @@
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/* Configure for U-Boot environment */
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#define BZ_NO_STDIO
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#ifndef CONFIG_SANDBOX
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#define BZ_NO_COMPRESS
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#endif
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/* End of configuration for U-Boot environment */
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#ifdef __cplusplus
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@ -4,3 +4,4 @@
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obj-y += bzlib.o bzlib_crctable.o bzlib_decompress.o \
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bzlib_randtable.o bzlib_huffman.o
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obj-$(CONFIG_SANDBOX) += bzlib_compress.o bzlib_blocksort.o
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1134
lib/bzip2/bzlib_blocksort.c
Normal file
1134
lib/bzip2/bzlib_blocksort.c
Normal file
File diff suppressed because it is too large
Load diff
714
lib/bzip2/bzlib_compress.c
Normal file
714
lib/bzip2/bzlib_compress.c
Normal file
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@ -0,0 +1,714 @@
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/*-------------------------------------------------------------*/
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/*--- Compression machinery (not incl block sorting) ---*/
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/*--- compress.c ---*/
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/*-------------------------------------------------------------*/
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/*--
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This file is a part of bzip2 and/or libbzip2, a program and
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library for lossless, block-sorting data compression.
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Copyright (C) 1996-2002 Julian R Seward. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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3. Altered source versions must be plainly marked as such, and must
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not be misrepresented as being the original software.
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4. The name of the author may not be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Julian Seward, Cambridge, UK.
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jseward@acm.org
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bzip2/libbzip2 version 1.0.6 of 6 September 2010
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Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
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This program is based on (at least) the work of:
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Mike Burrows
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David Wheeler
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Peter Fenwick
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Alistair Moffat
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Radford Neal
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Ian H. Witten
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Robert Sedgewick
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Jon L. Bentley
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For more information on these sources, see the manual.
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--*/
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/* CHANGES
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0.9.0 -- original version.
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0.9.0a/b -- no changes in this file.
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0.9.0c -- changed setting of nGroups in sendMTFValues()
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so as to do a bit better on small files
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*/
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#include "bzlib_private.h"
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/*---------------------------------------------------*/
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/*--- Bit stream I/O ---*/
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/*---------------------------------------------------*/
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/*---------------------------------------------------*/
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void BZ2_bsInitWrite ( EState* s )
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{
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s->bsLive = 0;
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s->bsBuff = 0;
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}
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/*---------------------------------------------------*/
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static
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void bsFinishWrite ( EState* s )
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{
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while (s->bsLive > 0) {
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s->zbits[s->numZ] = (UChar)(s->bsBuff >> 24);
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s->numZ++;
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s->bsBuff <<= 8;
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s->bsLive -= 8;
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}
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}
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/*---------------------------------------------------*/
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#define bsNEEDW(nz) \
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{ \
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while (s->bsLive >= 8) { \
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s->zbits[s->numZ] \
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= (UChar)(s->bsBuff >> 24); \
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s->numZ++; \
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s->bsBuff <<= 8; \
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s->bsLive -= 8; \
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} \
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}
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/*---------------------------------------------------*/
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static
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__inline__
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void bsW ( EState* s, Int32 n, UInt32 v )
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{
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bsNEEDW ( n );
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s->bsBuff |= (v << (32 - s->bsLive - n));
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s->bsLive += n;
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}
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/*---------------------------------------------------*/
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static
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void bsPutUInt32 ( EState* s, UInt32 u )
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{
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bsW ( s, 8, (u >> 24) & 0xffL );
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bsW ( s, 8, (u >> 16) & 0xffL );
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bsW ( s, 8, (u >> 8) & 0xffL );
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bsW ( s, 8, u & 0xffL );
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}
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/*---------------------------------------------------*/
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static
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void bsPutUChar ( EState* s, UChar c )
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{
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bsW( s, 8, (UInt32)c );
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}
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/*---------------------------------------------------*/
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/*--- The back end proper ---*/
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/*---------------------------------------------------*/
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/*---------------------------------------------------*/
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static
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void makeMaps_e ( EState* s )
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{
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Int32 i;
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s->nInUse = 0;
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for (i = 0; i < 256; i++)
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if (s->inUse[i]) {
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s->unseqToSeq[i] = s->nInUse;
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s->nInUse++;
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}
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}
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/*---------------------------------------------------*/
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static
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void generateMTFValues ( EState* s )
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{
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UChar yy[256];
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Int32 i, j;
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Int32 zPend;
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Int32 wr;
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Int32 EOB;
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/*
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After sorting (eg, here),
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s->arr1 [ 0 .. s->nblock-1 ] holds sorted order,
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and
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((UChar*)s->arr2) [ 0 .. s->nblock-1 ]
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holds the original block data.
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The first thing to do is generate the MTF values,
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and put them in
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((UInt16*)s->arr1) [ 0 .. s->nblock-1 ].
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Because there are strictly fewer or equal MTF values
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than block values, ptr values in this area are overwritten
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with MTF values only when they are no longer needed.
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The final compressed bitstream is generated into the
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area starting at
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(UChar*) (&((UChar*)s->arr2)[s->nblock])
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These storage aliases are set up in bzCompressInit(),
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except for the last one, which is arranged in
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compressBlock().
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*/
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UInt32* ptr = s->ptr;
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UChar* block = s->block;
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UInt16* mtfv = s->mtfv;
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makeMaps_e ( s );
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EOB = s->nInUse+1;
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for (i = 0; i <= EOB; i++) s->mtfFreq[i] = 0;
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wr = 0;
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zPend = 0;
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for (i = 0; i < s->nInUse; i++) yy[i] = (UChar) i;
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for (i = 0; i < s->nblock; i++) {
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UChar ll_i;
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AssertD ( wr <= i, "generateMTFValues(1)" );
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j = ptr[i]-1; if (j < 0) j += s->nblock;
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ll_i = s->unseqToSeq[block[j]];
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AssertD ( ll_i < s->nInUse, "generateMTFValues(2a)" );
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if (yy[0] == ll_i) {
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zPend++;
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} else {
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if (zPend > 0) {
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zPend--;
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while (True) {
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if (zPend & 1) {
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mtfv[wr] = BZ_RUNB; wr++;
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s->mtfFreq[BZ_RUNB]++;
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} else {
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mtfv[wr] = BZ_RUNA; wr++;
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s->mtfFreq[BZ_RUNA]++;
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}
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if (zPend < 2) break;
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zPend = (zPend - 2) / 2;
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};
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zPend = 0;
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}
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{
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register UChar rtmp;
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register UChar* ryy_j;
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register UChar rll_i;
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rtmp = yy[1];
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yy[1] = yy[0];
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ryy_j = &(yy[1]);
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rll_i = ll_i;
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while ( rll_i != rtmp ) {
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register UChar rtmp2;
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ryy_j++;
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rtmp2 = rtmp;
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rtmp = *ryy_j;
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*ryy_j = rtmp2;
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};
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yy[0] = rtmp;
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j = ryy_j - &(yy[0]);
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mtfv[wr] = j+1; wr++; s->mtfFreq[j+1]++;
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}
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}
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}
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if (zPend > 0) {
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zPend--;
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while (True) {
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if (zPend & 1) {
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mtfv[wr] = BZ_RUNB; wr++;
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s->mtfFreq[BZ_RUNB]++;
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} else {
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mtfv[wr] = BZ_RUNA; wr++;
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s->mtfFreq[BZ_RUNA]++;
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}
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if (zPend < 2) break;
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zPend = (zPend - 2) / 2;
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};
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zPend = 0;
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}
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mtfv[wr] = EOB; wr++; s->mtfFreq[EOB]++;
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s->nMTF = wr;
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}
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/*---------------------------------------------------*/
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#define BZ_LESSER_ICOST 0
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#define BZ_GREATER_ICOST 15
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static
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void sendMTFValues ( EState* s )
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{
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Int32 v, t, i, j, gs, ge, totc, bt, bc, iter;
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Int32 nSelectors, alphaSize, minLen, maxLen, selCtr;
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Int32 nGroups, nBytes;
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/*--
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UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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is a global since the decoder also needs it.
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Int32 code[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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Int32 rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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are also globals only used in this proc.
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Made global to keep stack frame size small.
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--*/
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UInt16 cost[BZ_N_GROUPS];
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Int32 fave[BZ_N_GROUPS];
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UInt16* mtfv = s->mtfv;
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if (s->verbosity >= 3)
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VPrintf3( " %d in block, %d after MTF & 1-2 coding, "
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"%d+2 syms in use\n",
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s->nblock, s->nMTF, s->nInUse );
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alphaSize = s->nInUse+2;
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for (t = 0; t < BZ_N_GROUPS; t++)
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for (v = 0; v < alphaSize; v++)
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s->len[t][v] = BZ_GREATER_ICOST;
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/*--- Decide how many coding tables to use ---*/
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AssertH ( s->nMTF > 0, 3001 );
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if (s->nMTF < 200) nGroups = 2; else
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if (s->nMTF < 600) nGroups = 3; else
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if (s->nMTF < 1200) nGroups = 4; else
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if (s->nMTF < 2400) nGroups = 5; else
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nGroups = 6;
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/*--- Generate an initial set of coding tables ---*/
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{
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Int32 nPart, remF, tFreq, aFreq;
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nPart = nGroups;
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remF = s->nMTF;
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gs = 0;
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while (nPart > 0) {
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tFreq = remF / nPart;
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ge = gs-1;
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aFreq = 0;
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while (aFreq < tFreq && ge < alphaSize-1) {
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ge++;
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aFreq += s->mtfFreq[ge];
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}
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if (ge > gs
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&& nPart != nGroups && nPart != 1
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&& ((nGroups-nPart) % 2 == 1)) {
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aFreq -= s->mtfFreq[ge];
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ge--;
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}
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if (s->verbosity >= 3)
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VPrintf5( " initial group %d, [%d .. %d], "
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"has %d syms (%4.1f%%)\n",
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nPart, gs, ge, aFreq,
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(100.0 * (float)aFreq) / (float)(s->nMTF) );
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for (v = 0; v < alphaSize; v++)
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if (v >= gs && v <= ge)
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s->len[nPart-1][v] = BZ_LESSER_ICOST; else
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s->len[nPart-1][v] = BZ_GREATER_ICOST;
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nPart--;
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gs = ge+1;
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remF -= aFreq;
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}
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}
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/*---
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Iterate up to BZ_N_ITERS times to improve the tables.
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---*/
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for (iter = 0; iter < BZ_N_ITERS; iter++) {
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for (t = 0; t < nGroups; t++) fave[t] = 0;
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for (t = 0; t < nGroups; t++)
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for (v = 0; v < alphaSize; v++)
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s->rfreq[t][v] = 0;
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/*---
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Set up an auxiliary length table which is used to fast-track
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the common case (nGroups == 6).
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---*/
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if (nGroups == 6) {
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for (v = 0; v < alphaSize; v++) {
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s->len_pack[v][0] = (s->len[1][v] << 16) | s->len[0][v];
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s->len_pack[v][1] = (s->len[3][v] << 16) | s->len[2][v];
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s->len_pack[v][2] = (s->len[5][v] << 16) | s->len[4][v];
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}
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}
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nSelectors = 0;
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totc = 0;
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gs = 0;
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while (True) {
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/*--- Set group start & end marks. --*/
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if (gs >= s->nMTF) break;
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ge = gs + BZ_G_SIZE - 1;
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if (ge >= s->nMTF) ge = s->nMTF-1;
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/*--
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Calculate the cost of this group as coded
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by each of the coding tables.
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--*/
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for (t = 0; t < nGroups; t++) cost[t] = 0;
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if (nGroups == 6 && 50 == ge-gs+1) {
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/*--- fast track the common case ---*/
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register UInt32 cost01, cost23, cost45;
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register UInt16 icv;
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cost01 = cost23 = cost45 = 0;
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# define BZ_ITER(nn) \
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icv = mtfv[gs+(nn)]; \
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cost01 += s->len_pack[icv][0]; \
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cost23 += s->len_pack[icv][1]; \
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cost45 += s->len_pack[icv][2]; \
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BZ_ITER(0); BZ_ITER(1); BZ_ITER(2); BZ_ITER(3); BZ_ITER(4);
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BZ_ITER(5); BZ_ITER(6); BZ_ITER(7); BZ_ITER(8); BZ_ITER(9);
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BZ_ITER(10); BZ_ITER(11); BZ_ITER(12); BZ_ITER(13); BZ_ITER(14);
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BZ_ITER(15); BZ_ITER(16); BZ_ITER(17); BZ_ITER(18); BZ_ITER(19);
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BZ_ITER(20); BZ_ITER(21); BZ_ITER(22); BZ_ITER(23); BZ_ITER(24);
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BZ_ITER(25); BZ_ITER(26); BZ_ITER(27); BZ_ITER(28); BZ_ITER(29);
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BZ_ITER(30); BZ_ITER(31); BZ_ITER(32); BZ_ITER(33); BZ_ITER(34);
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BZ_ITER(35); BZ_ITER(36); BZ_ITER(37); BZ_ITER(38); BZ_ITER(39);
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BZ_ITER(40); BZ_ITER(41); BZ_ITER(42); BZ_ITER(43); BZ_ITER(44);
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BZ_ITER(45); BZ_ITER(46); BZ_ITER(47); BZ_ITER(48); BZ_ITER(49);
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# undef BZ_ITER
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cost[0] = cost01 & 0xffff; cost[1] = cost01 >> 16;
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cost[2] = cost23 & 0xffff; cost[3] = cost23 >> 16;
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cost[4] = cost45 & 0xffff; cost[5] = cost45 >> 16;
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} else {
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/*--- slow version which correctly handles all situations ---*/
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for (i = gs; i <= ge; i++) {
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UInt16 icv = mtfv[i];
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for (t = 0; t < nGroups; t++) cost[t] += s->len[t][icv];
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}
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}
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/*--
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Find the coding table which is best for this group,
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and record its identity in the selector table.
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--*/
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bc = 999999999; bt = -1;
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for (t = 0; t < nGroups; t++)
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if (cost[t] < bc) { bc = cost[t]; bt = t; };
|
||||
totc += bc;
|
||||
fave[bt]++;
|
||||
s->selector[nSelectors] = bt;
|
||||
nSelectors++;
|
||||
|
||||
/*--
|
||||
Increment the symbol frequencies for the selected table.
|
||||
--*/
|
||||
if (nGroups == 6 && 50 == ge-gs+1) {
|
||||
/*--- fast track the common case ---*/
|
||||
|
||||
# define BZ_ITUR(nn) s->rfreq[bt][ mtfv[gs+(nn)] ]++
|
||||
|
||||
BZ_ITUR(0); BZ_ITUR(1); BZ_ITUR(2); BZ_ITUR(3); BZ_ITUR(4);
|
||||
BZ_ITUR(5); BZ_ITUR(6); BZ_ITUR(7); BZ_ITUR(8); BZ_ITUR(9);
|
||||
BZ_ITUR(10); BZ_ITUR(11); BZ_ITUR(12); BZ_ITUR(13); BZ_ITUR(14);
|
||||
BZ_ITUR(15); BZ_ITUR(16); BZ_ITUR(17); BZ_ITUR(18); BZ_ITUR(19);
|
||||
BZ_ITUR(20); BZ_ITUR(21); BZ_ITUR(22); BZ_ITUR(23); BZ_ITUR(24);
|
||||
BZ_ITUR(25); BZ_ITUR(26); BZ_ITUR(27); BZ_ITUR(28); BZ_ITUR(29);
|
||||
BZ_ITUR(30); BZ_ITUR(31); BZ_ITUR(32); BZ_ITUR(33); BZ_ITUR(34);
|
||||
BZ_ITUR(35); BZ_ITUR(36); BZ_ITUR(37); BZ_ITUR(38); BZ_ITUR(39);
|
||||
BZ_ITUR(40); BZ_ITUR(41); BZ_ITUR(42); BZ_ITUR(43); BZ_ITUR(44);
|
||||
BZ_ITUR(45); BZ_ITUR(46); BZ_ITUR(47); BZ_ITUR(48); BZ_ITUR(49);
|
||||
|
||||
# undef BZ_ITUR
|
||||
|
||||
} else {
|
||||
/*--- slow version which correctly handles all situations ---*/
|
||||
for (i = gs; i <= ge; i++)
|
||||
s->rfreq[bt][ mtfv[i] ]++;
|
||||
}
|
||||
|
||||
gs = ge+1;
|
||||
}
|
||||
if (s->verbosity >= 3) {
|
||||
VPrintf2 ( " pass %d: size is %d, grp uses are ",
|
||||
iter+1, totc/8 );
|
||||
for (t = 0; t < nGroups; t++)
|
||||
VPrintf1 ( "%d ", fave[t] );
|
||||
VPrintf0 ( "\n" );
|
||||
}
|
||||
|
||||
/*--
|
||||
Recompute the tables based on the accumulated frequencies.
|
||||
--*/
|
||||
/* maxLen was changed from 20 to 17 in bzip2-1.0.3. See
|
||||
comment in huffman.c for details. */
|
||||
for (t = 0; t < nGroups; t++)
|
||||
BZ2_hbMakeCodeLengths ( &(s->len[t][0]), &(s->rfreq[t][0]),
|
||||
alphaSize, 17 /*20*/ );
|
||||
}
|
||||
|
||||
|
||||
AssertH( nGroups < 8, 3002 );
|
||||
AssertH( nSelectors < 32768 &&
|
||||
nSelectors <= (2 + (900000 / BZ_G_SIZE)),
|
||||
3003 );
|
||||
|
||||
|
||||
/*--- Compute MTF values for the selectors. ---*/
|
||||
{
|
||||
UChar pos[BZ_N_GROUPS], ll_i, tmp2, tmp;
|
||||
for (i = 0; i < nGroups; i++) pos[i] = i;
|
||||
for (i = 0; i < nSelectors; i++) {
|
||||
ll_i = s->selector[i];
|
||||
j = 0;
|
||||
tmp = pos[j];
|
||||
while ( ll_i != tmp ) {
|
||||
j++;
|
||||
tmp2 = tmp;
|
||||
tmp = pos[j];
|
||||
pos[j] = tmp2;
|
||||
};
|
||||
pos[0] = tmp;
|
||||
s->selectorMtf[i] = j;
|
||||
}
|
||||
};
|
||||
|
||||
/*--- Assign actual codes for the tables. --*/
|
||||
for (t = 0; t < nGroups; t++) {
|
||||
minLen = 32;
|
||||
maxLen = 0;
|
||||
for (i = 0; i < alphaSize; i++) {
|
||||
if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
|
||||
if (s->len[t][i] < minLen) minLen = s->len[t][i];
|
||||
}
|
||||
AssertH ( !(maxLen > 17 /*20*/ ), 3004 );
|
||||
AssertH ( !(minLen < 1), 3005 );
|
||||
BZ2_hbAssignCodes ( &(s->code[t][0]), &(s->len[t][0]),
|
||||
minLen, maxLen, alphaSize );
|
||||
}
|
||||
|
||||
/*--- Transmit the mapping table. ---*/
|
||||
{
|
||||
Bool inUse16[16];
|
||||
for (i = 0; i < 16; i++) {
|
||||
inUse16[i] = False;
|
||||
for (j = 0; j < 16; j++)
|
||||
if (s->inUse[i * 16 + j]) inUse16[i] = True;
|
||||
}
|
||||
|
||||
nBytes = s->numZ;
|
||||
for (i = 0; i < 16; i++)
|
||||
if (inUse16[i]) bsW(s,1,1); else bsW(s,1,0);
|
||||
|
||||
for (i = 0; i < 16; i++)
|
||||
if (inUse16[i])
|
||||
for (j = 0; j < 16; j++) {
|
||||
if (s->inUse[i * 16 + j]) bsW(s,1,1); else bsW(s,1,0);
|
||||
}
|
||||
|
||||
if (s->verbosity >= 3)
|
||||
VPrintf1( " bytes: mapping %d, ", s->numZ-nBytes );
|
||||
}
|
||||
|
||||
/*--- Now the selectors. ---*/
|
||||
nBytes = s->numZ;
|
||||
bsW ( s, 3, nGroups );
|
||||
bsW ( s, 15, nSelectors );
|
||||
for (i = 0; i < nSelectors; i++) {
|
||||
for (j = 0; j < s->selectorMtf[i]; j++) bsW(s,1,1);
|
||||
bsW(s,1,0);
|
||||
}
|
||||
if (s->verbosity >= 3)
|
||||
VPrintf1( "selectors %d, ", s->numZ-nBytes );
|
||||
|
||||
/*--- Now the coding tables. ---*/
|
||||
nBytes = s->numZ;
|
||||
|
||||
for (t = 0; t < nGroups; t++) {
|
||||
Int32 curr = s->len[t][0];
|
||||
bsW ( s, 5, curr );
|
||||
for (i = 0; i < alphaSize; i++) {
|
||||
while (curr < s->len[t][i]) { bsW(s,2,2); curr++; /* 10 */ };
|
||||
while (curr > s->len[t][i]) { bsW(s,2,3); curr--; /* 11 */ };
|
||||
bsW ( s, 1, 0 );
|
||||
}
|
||||
}
|
||||
|
||||
if (s->verbosity >= 3)
|
||||
VPrintf1 ( "code lengths %d, ", s->numZ-nBytes );
|
||||
|
||||
/*--- And finally, the block data proper ---*/
|
||||
nBytes = s->numZ;
|
||||
selCtr = 0;
|
||||
gs = 0;
|
||||
while (True) {
|
||||
if (gs >= s->nMTF) break;
|
||||
ge = gs + BZ_G_SIZE - 1;
|
||||
if (ge >= s->nMTF) ge = s->nMTF-1;
|
||||
AssertH ( s->selector[selCtr] < nGroups, 3006 );
|
||||
|
||||
if (nGroups == 6 && 50 == ge-gs+1) {
|
||||
/*--- fast track the common case ---*/
|
||||
UInt16 mtfv_i;
|
||||
UChar* s_len_sel_selCtr
|
||||
= &(s->len[s->selector[selCtr]][0]);
|
||||
Int32* s_code_sel_selCtr
|
||||
= &(s->code[s->selector[selCtr]][0]);
|
||||
|
||||
# define BZ_ITAH(nn) \
|
||||
mtfv_i = mtfv[gs+(nn)]; \
|
||||
bsW ( s, \
|
||||
s_len_sel_selCtr[mtfv_i], \
|
||||
s_code_sel_selCtr[mtfv_i] )
|
||||
|
||||
BZ_ITAH(0); BZ_ITAH(1); BZ_ITAH(2); BZ_ITAH(3); BZ_ITAH(4);
|
||||
BZ_ITAH(5); BZ_ITAH(6); BZ_ITAH(7); BZ_ITAH(8); BZ_ITAH(9);
|
||||
BZ_ITAH(10); BZ_ITAH(11); BZ_ITAH(12); BZ_ITAH(13); BZ_ITAH(14);
|
||||
BZ_ITAH(15); BZ_ITAH(16); BZ_ITAH(17); BZ_ITAH(18); BZ_ITAH(19);
|
||||
BZ_ITAH(20); BZ_ITAH(21); BZ_ITAH(22); BZ_ITAH(23); BZ_ITAH(24);
|
||||
BZ_ITAH(25); BZ_ITAH(26); BZ_ITAH(27); BZ_ITAH(28); BZ_ITAH(29);
|
||||
BZ_ITAH(30); BZ_ITAH(31); BZ_ITAH(32); BZ_ITAH(33); BZ_ITAH(34);
|
||||
BZ_ITAH(35); BZ_ITAH(36); BZ_ITAH(37); BZ_ITAH(38); BZ_ITAH(39);
|
||||
BZ_ITAH(40); BZ_ITAH(41); BZ_ITAH(42); BZ_ITAH(43); BZ_ITAH(44);
|
||||
BZ_ITAH(45); BZ_ITAH(46); BZ_ITAH(47); BZ_ITAH(48); BZ_ITAH(49);
|
||||
|
||||
# undef BZ_ITAH
|
||||
|
||||
} else {
|
||||
/*--- slow version which correctly handles all situations ---*/
|
||||
for (i = gs; i <= ge; i++) {
|
||||
bsW ( s,
|
||||
s->len [s->selector[selCtr]] [mtfv[i]],
|
||||
s->code [s->selector[selCtr]] [mtfv[i]] );
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
gs = ge+1;
|
||||
selCtr++;
|
||||
}
|
||||
AssertH( selCtr == nSelectors, 3007 );
|
||||
|
||||
if (s->verbosity >= 3)
|
||||
VPrintf1( "codes %d\n", s->numZ-nBytes );
|
||||
else /* squash compiler 'used but not set' warning */
|
||||
nBytes = nBytes;
|
||||
}
|
||||
|
||||
|
||||
/*---------------------------------------------------*/
|
||||
void BZ2_compressBlock ( EState* s, Bool is_last_block )
|
||||
{
|
||||
if (s->nblock > 0) {
|
||||
|
||||
BZ_FINALISE_CRC ( s->blockCRC );
|
||||
s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31);
|
||||
s->combinedCRC ^= s->blockCRC;
|
||||
if (s->blockNo > 1) s->numZ = 0;
|
||||
|
||||
if (s->verbosity >= 2)
|
||||
VPrintf4( " block %d: crc = 0x%08x, "
|
||||
"combined CRC = 0x%08x, size = %d\n",
|
||||
s->blockNo, s->blockCRC, s->combinedCRC, s->nblock );
|
||||
|
||||
BZ2_blockSort ( s );
|
||||
}
|
||||
|
||||
s->zbits = (UChar*) (&((UChar*)s->arr2)[s->nblock]);
|
||||
|
||||
/*-- If this is the first block, create the stream header. --*/
|
||||
if (s->blockNo == 1) {
|
||||
BZ2_bsInitWrite ( s );
|
||||
bsPutUChar ( s, BZ_HDR_B );
|
||||
bsPutUChar ( s, BZ_HDR_Z );
|
||||
bsPutUChar ( s, BZ_HDR_h );
|
||||
bsPutUChar ( s, (UChar)(BZ_HDR_0 + s->blockSize100k) );
|
||||
}
|
||||
|
||||
if (s->nblock > 0) {
|
||||
|
||||
bsPutUChar ( s, 0x31 ); bsPutUChar ( s, 0x41 );
|
||||
bsPutUChar ( s, 0x59 ); bsPutUChar ( s, 0x26 );
|
||||
bsPutUChar ( s, 0x53 ); bsPutUChar ( s, 0x59 );
|
||||
|
||||
/*-- Now the block's CRC, so it is in a known place. --*/
|
||||
bsPutUInt32 ( s, s->blockCRC );
|
||||
|
||||
/*--
|
||||
Now a single bit indicating (non-)randomisation.
|
||||
As of version 0.9.5, we use a better sorting algorithm
|
||||
which makes randomisation unnecessary. So always set
|
||||
the randomised bit to 'no'. Of course, the decoder
|
||||
still needs to be able to handle randomised blocks
|
||||
so as to maintain backwards compatibility with
|
||||
older versions of bzip2.
|
||||
--*/
|
||||
bsW(s,1,0);
|
||||
|
||||
bsW ( s, 24, s->origPtr );
|
||||
generateMTFValues ( s );
|
||||
sendMTFValues ( s );
|
||||
}
|
||||
|
||||
|
||||
/*-- If this is the last block, add the stream trailer. --*/
|
||||
if (is_last_block) {
|
||||
|
||||
bsPutUChar ( s, 0x17 ); bsPutUChar ( s, 0x72 );
|
||||
bsPutUChar ( s, 0x45 ); bsPutUChar ( s, 0x38 );
|
||||
bsPutUChar ( s, 0x50 ); bsPutUChar ( s, 0x90 );
|
||||
bsPutUInt32 ( s, s->combinedCRC );
|
||||
if (s->verbosity >= 2)
|
||||
VPrintf1( " final combined CRC = 0x%08x\n ", s->combinedCRC );
|
||||
bsFinishWrite ( s );
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------*/
|
||||
/*--- end compress.c ---*/
|
||||
/*-------------------------------------------------------------*/
|
||||
Loading…
Reference in a new issue