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-rw-r--r--archival/Config.in15
-rw-r--r--archival/Kbuild2
-rw-r--r--archival/liblzo.h93
-rw-r--r--archival/liblzo_interface.h71
-rw-r--r--archival/lzo1x_1.c35
-rw-r--r--archival/lzo1x_1o.c35
-rw-r--r--archival/lzo1x_9x.c920
-rw-r--r--archival/lzo1x_c.c296
-rw-r--r--archival/lzo1x_d.c420
-rw-r--r--archival/lzop.c1075
10 files changed, 2962 insertions, 0 deletions
diff --git a/archival/Config.in b/archival/Config.in
index e0d43c0ee..a983e4433 100644
--- a/archival/Config.in
+++ b/archival/Config.in
@@ -165,6 +165,21 @@ config GZIP
gzip is used to compress files.
It's probably the most widely used UNIX compression program.
+config LZOP
+ bool "lzop"
+ default n
+ help
+ Lzop compression/decompresion.
+
+config LZOP_COMPR_HIGH
+ bool "lzop complession levels 7,8,9 (not very useful)"
+ default n
+ depends on LZOP
+ help
+ High levels (7,8,9) of lzop compression. These levels
+ are actually slower than gzip at equivalent compression ratios
+ and take up 3.2K of code.
+
config RPM2CPIO
bool "rpm2cpio"
default n
diff --git a/archival/Kbuild b/archival/Kbuild
index 72dbdda0e..de0ca4315 100644
--- a/archival/Kbuild
+++ b/archival/Kbuild
@@ -16,6 +16,8 @@ lib-$(CONFIG_DPKG) += dpkg.o
lib-$(CONFIG_DPKG_DEB) += dpkg_deb.o
lib-$(CONFIG_GUNZIP) += bbunzip.o
lib-$(CONFIG_GZIP) += gzip.o bbunzip.o
+lib-$(CONFIG_LZOP) += lzop.o lzo1x_1.o lzo1x_1o.o lzo1x_d.o
+lib-$(CONFIG_LZOP_COMPR_HIGH) += lzo1x_9x.o
lib-$(CONFIG_RPM2CPIO) += rpm2cpio.o
lib-$(CONFIG_RPM) += rpm.o
lib-$(CONFIG_TAR) += tar.o
diff --git a/archival/liblzo.h b/archival/liblzo.h
new file mode 100644
index 000000000..843997cb9
--- /dev/null
+++ b/archival/liblzo.h
@@ -0,0 +1,93 @@
+/*
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "liblzo_interface.h"
+
+/* lzo-2.03/src/config1x.h */
+#define M2_MIN_LEN 3
+#define M2_MAX_LEN 8
+#define M3_MAX_LEN 33
+#define M4_MAX_LEN 9
+#define M1_MAX_OFFSET 0x0400
+#define M2_MAX_OFFSET 0x0800
+#define M3_MAX_OFFSET 0x4000
+#define M4_MAX_OFFSET 0xbfff
+#define M1_MARKER 0
+#define M3_MARKER 32
+#define M4_MARKER 16
+
+#define MX_MAX_OFFSET (M1_MAX_OFFSET + M2_MAX_OFFSET)
+#define MIN_LOOKAHEAD (M2_MAX_LEN + 1)
+
+#define LZO_EOF_CODE
+
+/* lzo-2.03/src/lzo_dict.h */
+#define GINDEX(m_pos,m_off,dict,dindex,in) m_pos = dict[dindex]
+#define DX2(p,s1,s2) \
+ (((((unsigned)((p)[2]) << (s2)) ^ (p)[1]) << (s1)) ^ (p)[0])
+//#define DA3(p,s1,s2,s3) ((DA2((p)+1,s2,s3) << (s1)) + (p)[0])
+//#define DS3(p,s1,s2,s3) ((DS2((p)+1,s2,s3) << (s1)) - (p)[0])
+#define DX3(p,s1,s2,s3) ((DX2((p)+1,s2,s3) << (s1)) ^ (p)[0])
+
+#define D_SIZE (1U << D_BITS)
+#define D_MASK ((1U << D_BITS) - 1)
+#define D_HIGH ((D_MASK >> 1) + 1)
+
+#define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \
+ ( \
+ m_pos = ip - (unsigned)(ip - m_pos), \
+ ((uintptr_t)m_pos < (uintptr_t)in \
+ || (m_off = (unsigned)(ip - m_pos)) <= 0 \
+ || m_off > max_offset) \
+ )
+
+#define DENTRY(p,in) (p)
+#define UPDATE_I(dict,drun,index,p,in) dict[index] = DENTRY(p,in)
+
+#define DMS(v,s) ((unsigned) (((v) & (D_MASK >> (s))) << (s)))
+#define DM(v) ((unsigned) ((v) & D_MASK))
+#define DMUL(a,b) ((unsigned) ((a) * (b)))
+
+/* lzo-2.03/src/lzo_ptr.h */
+#define pd(a,b) ((unsigned)((a)-(b)))
+
+# define TEST_IP (ip < ip_end)
+# define NEED_IP(x) \
+ if ((unsigned)(ip_end - ip) < (unsigned)(x)) goto input_overrun
+
+# undef TEST_OP /* don't need both of the tests here */
+# define TEST_OP 1
+# define NEED_OP(x) \
+ if ((unsigned)(op_end - op) < (unsigned)(x)) goto output_overrun
+
+#define HAVE_ANY_OP 1
+
+//#if defined(LZO_TEST_OVERRUN_LOOKBEHIND)
+# define TEST_LB(m_pos) if (m_pos < out || m_pos >= op) goto lookbehind_overrun
+//# define TEST_LBO(m_pos,o) if (m_pos < out || m_pos >= op - (o)) goto lookbehind_overrun
+//#else
+//# define TEST_LB(m_pos) ((void) 0)
+//# define TEST_LBO(m_pos,o) ((void) 0)
+//#endif
diff --git a/archival/liblzo_interface.h b/archival/liblzo_interface.h
new file mode 100644
index 000000000..9a84c0b6b
--- /dev/null
+++ b/archival/liblzo_interface.h
@@ -0,0 +1,71 @@
+/*
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#define LZO1X
+#undef LZO1Y
+
+#undef assert
+/*
+static void die_at(int line)
+{
+ bb_error_msg_and_die("internal error at %d", line);
+}
+#define assert(v) if (!(v)) die_at(__LINE__)
+*/
+#define assert(v) ((void)0)
+
+int lzo1x_1_compress(const uint8_t* src, unsigned src_len,
+ uint8_t* dst, unsigned* dst_len,
+ void* wrkmem);
+int lzo1x_1_15_compress(const uint8_t* src, unsigned src_len,
+ uint8_t* dst, unsigned* dst_len,
+ void* wrkmem);
+int lzo1x_999_compress_level(const uint8_t* in, unsigned in_len,
+ uint8_t* out, unsigned* out_len,
+ void* wrkmem,
+ int compression_level);
+
+/* decompression */
+//int lzo1x_decompress(const uint8_t* src, unsigned src_len,
+// uint8_t* dst, unsigned* dst_len,
+// void* wrkmem /* NOT USED */);
+/* safe decompression with overrun testing */
+int lzo1x_decompress_safe(const uint8_t* src, unsigned src_len,
+ uint8_t* dst, unsigned* dst_len,
+ void* wrkmem /* NOT USED */);
+
+#define LZO_E_OK 0
+#define LZO_E_ERROR (-1)
+#define LZO_E_OUT_OF_MEMORY (-2) /* [not used right now] */
+#define LZO_E_NOT_COMPRESSIBLE (-3) /* [not used right now] */
+#define LZO_E_INPUT_OVERRUN (-4)
+#define LZO_E_OUTPUT_OVERRUN (-5)
+#define LZO_E_LOOKBEHIND_OVERRUN (-6)
+#define LZO_E_EOF_NOT_FOUND (-7)
+#define LZO_E_INPUT_NOT_CONSUMED (-8)
+#define LZO_E_NOT_YET_IMPLEMENTED (-9) /* [not used right now] */
+
+/* lzo-2.03/include/lzo/lzoconf.h */
+#define LZO_VERSION 0x2030
diff --git a/archival/lzo1x_1.c b/archival/lzo1x_1.c
new file mode 100644
index 000000000..a88839846
--- /dev/null
+++ b/archival/lzo1x_1.c
@@ -0,0 +1,35 @@
+/* LZO1X-1 compression
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include "libbb.h"
+#include "liblzo.h"
+
+#define D_BITS 14
+#define D_INDEX1(d,p) d = DM(DMUL(0x21,DX3(p,5,5,6)) >> 5)
+#define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f)
+
+#define DO_COMPRESS lzo1x_1_compress
+
+#include "lzo1x_c.c"
diff --git a/archival/lzo1x_1o.c b/archival/lzo1x_1o.c
new file mode 100644
index 000000000..3c61253e0
--- /dev/null
+++ b/archival/lzo1x_1o.c
@@ -0,0 +1,35 @@
+/* LZO1X-1(15) compression
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include "libbb.h"
+#include "liblzo.h"
+
+#define D_BITS 15
+#define D_INDEX1(d,p) d = DM(DMUL(0x21,DX3(p,5,5,6)) >> 5)
+#define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f)
+
+#define DO_COMPRESS lzo1x_1_15_compress
+
+#include "lzo1x_c.c"
diff --git a/archival/lzo1x_9x.c b/archival/lzo1x_9x.c
new file mode 100644
index 000000000..d30e2e7d1
--- /dev/null
+++ b/archival/lzo1x_9x.c
@@ -0,0 +1,920 @@
+/* lzo1x_9x.c -- implementation of the LZO1X-999 compression algorithm
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ Markus F.X.J. Oberhumer
+ <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+*/
+#include "libbb.h"
+
+/* The following is probably only safe on Intel-compatible processors ... */
+#define LZO_UNALIGNED_OK_2
+#define LZO_UNALIGNED_OK_4
+
+#include "liblzo.h"
+
+#define LZO_MAX(a,b) ((a) >= (b) ? (a) : (b))
+#define LZO_MIN(a,b) ((a) <= (b) ? (a) : (b))
+#define LZO_MAX3(a,b,c) ((a) >= (b) ? LZO_MAX(a,c) : LZO_MAX(b,c))
+
+/***********************************************************************
+//
+************************************************************************/
+#define SWD_N M4_MAX_OFFSET /* size of ring buffer */
+#define SWD_F 2048 /* upper limit for match length */
+
+#define SWD_BEST_OFF (LZO_MAX3(M2_MAX_LEN, M3_MAX_LEN, M4_MAX_LEN) + 1)
+
+typedef struct {
+ int init;
+
+ unsigned look; /* bytes in lookahead buffer */
+
+ unsigned m_len;
+ unsigned m_off;
+
+ const uint8_t *bp;
+ const uint8_t *ip;
+ const uint8_t *in;
+ const uint8_t *in_end;
+ uint8_t *out;
+
+ unsigned r1_lit;
+
+} lzo1x_999_t;
+
+#define getbyte(c) ((c).ip < (c).in_end ? *((c).ip)++ : (-1))
+
+/* lzo_swd.c -- sliding window dictionary */
+
+/***********************************************************************
+//
+************************************************************************/
+#define SWD_UINT_MAX USHRT_MAX
+
+#ifndef SWD_HSIZE
+# define SWD_HSIZE 16384
+#endif
+#ifndef SWD_MAX_CHAIN
+# define SWD_MAX_CHAIN 2048
+#endif
+
+#define HEAD3(b, p) \
+ ( ((0x9f5f * ((((b[p]<<5)^b[p+1])<<5) ^ b[p+2])) >> 5) & (SWD_HSIZE-1) )
+
+#if defined(LZO_UNALIGNED_OK_2)
+# define HEAD2(b,p) (* (uint16_t *) &(b[p]))
+#else
+# define HEAD2(b,p) (b[p] ^ ((unsigned)b[p+1]<<8))
+#endif
+#define NIL2 SWD_UINT_MAX
+
+typedef struct lzo_swd {
+ /* public - "built-in" */
+
+ /* public - configuration */
+ unsigned max_chain;
+ int use_best_off;
+
+ /* public - output */
+ unsigned m_len;
+ unsigned m_off;
+ unsigned look;
+ int b_char;
+#if defined(SWD_BEST_OFF)
+ unsigned best_off[SWD_BEST_OFF];
+#endif
+
+ /* semi public */
+ lzo1x_999_t *c;
+ unsigned m_pos;
+#if defined(SWD_BEST_OFF)
+ unsigned best_pos[SWD_BEST_OFF];
+#endif
+
+ /* private */
+ unsigned ip; /* input pointer (lookahead) */
+ unsigned bp; /* buffer pointer */
+ unsigned rp; /* remove pointer */
+
+ unsigned node_count;
+ unsigned first_rp;
+
+ uint8_t b[SWD_N + SWD_F];
+ uint8_t b_wrap[SWD_F]; /* must follow b */
+ uint16_t head3[SWD_HSIZE];
+ uint16_t succ3[SWD_N + SWD_F];
+ uint16_t best3[SWD_N + SWD_F];
+ uint16_t llen3[SWD_HSIZE];
+#ifdef HEAD2
+ uint16_t head2[65536L];
+#endif
+} lzo_swd_t, *lzo_swd_p;
+
+#define SIZEOF_LZO_SWD_T (sizeof(lzo_swd_t))
+
+
+/* Access macro for head3.
+ * head3[key] may be uninitialized, but then its value will never be used.
+ */
+#define s_get_head3(s,key) s->head3[key]
+
+
+/***********************************************************************
+//
+************************************************************************/
+#define B_SIZE (SWD_N + SWD_F)
+
+static int swd_init(lzo_swd_p s)
+{
+ /* defaults */
+ s->node_count = SWD_N;
+
+ memset(s->llen3, 0, sizeof(s->llen3[0]) * (unsigned)SWD_HSIZE);
+#ifdef HEAD2
+ memset(s->head2, 0xff, sizeof(s->head2[0]) * 65536L);
+ assert(s->head2[0] == NIL2);
+#endif
+
+ s->ip = 0;
+ s->bp = s->ip;
+ s->first_rp = s->ip;
+
+ assert(s->ip + SWD_F <= B_SIZE);
+ s->look = (unsigned) (s->c->in_end - s->c->ip);
+ if (s->look > 0) {
+ if (s->look > SWD_F)
+ s->look = SWD_F;
+ memcpy(&s->b[s->ip],s->c->ip,s->look);
+ s->c->ip += s->look;
+ s->ip += s->look;
+ }
+ if (s->ip == B_SIZE)
+ s->ip = 0;
+
+ s->rp = s->first_rp;
+ if (s->rp >= s->node_count)
+ s->rp -= s->node_count;
+ else
+ s->rp += B_SIZE - s->node_count;
+
+ return LZO_E_OK;
+}
+
+#define swd_pos2off(s,pos) \
+ (s->bp > (pos) ? s->bp - (pos) : B_SIZE - ((pos) - s->bp))
+
+
+/***********************************************************************
+//
+************************************************************************/
+static void swd_getbyte(lzo_swd_p s)
+{
+ int c;
+
+ if ((c = getbyte(*(s->c))) < 0) {
+ if (s->look > 0)
+ --s->look;
+ } else {
+ s->b[s->ip] = c;
+ if (s->ip < SWD_F)
+ s->b_wrap[s->ip] = c;
+ }
+ if (++s->ip == B_SIZE)
+ s->ip = 0;
+ if (++s->bp == B_SIZE)
+ s->bp = 0;
+ if (++s->rp == B_SIZE)
+ s->rp = 0;
+}
+
+
+/***********************************************************************
+// remove node from lists
+************************************************************************/
+static void swd_remove_node(lzo_swd_p s, unsigned node)
+{
+ if (s->node_count == 0) {
+ unsigned key;
+
+ key = HEAD3(s->b,node);
+ assert(s->llen3[key] > 0);
+ --s->llen3[key];
+
+#ifdef HEAD2
+ key = HEAD2(s->b,node);
+ assert(s->head2[key] != NIL2);
+ if ((unsigned) s->head2[key] == node)
+ s->head2[key] = NIL2;
+#endif
+ } else
+ --s->node_count;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+static void swd_accept(lzo_swd_p s, unsigned n)
+{
+ assert(n <= s->look);
+
+ while (n--) {
+ unsigned key;
+
+ swd_remove_node(s,s->rp);
+
+ /* add bp into HEAD3 */
+ key = HEAD3(s->b,s->bp);
+ s->succ3[s->bp] = s_get_head3(s,key);
+ s->head3[key] = s->bp;
+ s->best3[s->bp] = SWD_F + 1;
+ s->llen3[key]++;
+ assert(s->llen3[key] <= SWD_N);
+
+#ifdef HEAD2
+ /* add bp into HEAD2 */
+ key = HEAD2(s->b,s->bp);
+ s->head2[key] = s->bp;
+#endif
+
+ swd_getbyte(s);
+ }
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+static void swd_search(lzo_swd_p s, unsigned node, unsigned cnt)
+{
+ const uint8_t *p1;
+ const uint8_t *p2;
+ const uint8_t *px;
+ unsigned m_len = s->m_len;
+ const uint8_t *b = s->b;
+ const uint8_t *bp = s->b + s->bp;
+ const uint8_t *bx = s->b + s->bp + s->look;
+ unsigned char scan_end1;
+
+ assert(s->m_len > 0);
+
+ scan_end1 = bp[m_len - 1];
+ for ( ; cnt-- > 0; node = s->succ3[node]) {
+ p1 = bp;
+ p2 = b + node;
+ px = bx;
+
+ assert(m_len < s->look);
+
+ if (p2[m_len - 1] == scan_end1 &&
+ p2[m_len] == p1[m_len] &&
+ p2[0] == p1[0] &&
+ p2[1] == p1[1]) {
+ unsigned i;
+ assert(lzo_memcmp(bp,&b[node],3) == 0);
+
+ p1 += 2; p2 += 2;
+ do {} while (++p1 < px && *p1 == *++p2);
+ i = p1-bp;
+
+ assert(lzo_memcmp(bp,&b[node],i) == 0);
+
+#if defined(SWD_BEST_OFF)
+ if (i < SWD_BEST_OFF) {
+ if (s->best_pos[i] == 0)
+ s->best_pos[i] = node + 1;
+ }
+#endif
+ if (i > m_len) {
+ s->m_len = m_len = i;
+ s->m_pos = node;
+ if (m_len == s->look)
+ return;
+ if (m_len >= SWD_F)
+ return;
+ if (m_len > (unsigned) s->best3[node])
+ return;
+ scan_end1 = bp[m_len - 1];
+ }
+ }
+ }
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+#ifdef HEAD2
+
+static int swd_search2(lzo_swd_p s)
+{
+ unsigned key;
+
+ assert(s->look >= 2);
+ assert(s->m_len > 0);
+
+ key = s->head2[ HEAD2(s->b,s->bp) ];
+ if (key == NIL2)
+ return 0;
+ assert(lzo_memcmp(&s->b[s->bp],&s->b[key],2) == 0);
+#if defined(SWD_BEST_OFF)
+ if (s->best_pos[2] == 0)
+ s->best_pos[2] = key + 1;
+#endif
+
+ if (s->m_len < 2) {
+ s->m_len = 2;
+ s->m_pos = key;
+ }
+ return 1;
+}
+
+#endif
+
+
+/***********************************************************************
+//
+************************************************************************/
+static void swd_findbest(lzo_swd_p s)
+{
+ unsigned key;
+ unsigned cnt, node;
+ unsigned len;
+
+ assert(s->m_len > 0);
+
+ /* get current head, add bp into HEAD3 */
+ key = HEAD3(s->b,s->bp);
+ node = s->succ3[s->bp] = s_get_head3(s,key);
+ cnt = s->llen3[key]++;
+ assert(s->llen3[key] <= SWD_N + SWD_F);
+ if (cnt > s->max_chain)
+ cnt = s->max_chain;
+ s->head3[key] = s->bp;
+
+ s->b_char = s->b[s->bp];
+ len = s->m_len;
+ if (s->m_len >= s->look) {
+ if (s->look == 0)
+ s->b_char = -1;
+ s->m_off = 0;
+ s->best3[s->bp] = SWD_F + 1;
+ } else {
+#ifdef HEAD2
+ if (swd_search2(s))
+#endif
+ if (s->look >= 3)
+ swd_search(s,node,cnt);
+ if (s->m_len > len)
+ s->m_off = swd_pos2off(s,s->m_pos);
+ s->best3[s->bp] = s->m_len;
+
+#if defined(SWD_BEST_OFF)
+ if (s->use_best_off) {
+ int i;
+ for (i = 2; i < SWD_BEST_OFF; i++)
+ if (s->best_pos[i] > 0)
+ s->best_off[i] = swd_pos2off(s,s->best_pos[i]-1);
+ else
+ s->best_off[i] = 0;
+ }
+#endif
+ }
+
+ swd_remove_node(s,s->rp);
+
+#ifdef HEAD2
+ /* add bp into HEAD2 */
+ key = HEAD2(s->b,s->bp);
+ s->head2[key] = s->bp;
+#endif
+}
+
+#undef HEAD3
+#undef HEAD2
+#undef s_get_head3
+
+
+/***********************************************************************
+//
+************************************************************************/
+static int init_match(lzo1x_999_t *c, lzo_swd_p s, uint32_t use_best_off)
+{
+ int r;
+
+ assert(!c->init);
+ c->init = 1;
+
+ s->c = c;
+
+ r = swd_init(s);
+ if (r != 0)
+ return r;
+
+ s->use_best_off = use_best_off;
+ return r;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+static int find_match(lzo1x_999_t *c, lzo_swd_p s,
+ unsigned this_len, unsigned skip)
+{
+ assert(c->init);
+
+ if (skip > 0) {
+ assert(this_len >= skip);
+ swd_accept(s, this_len - skip);
+ } else {
+ assert(this_len <= 1);
+ }
+
+ s->m_len = 1;
+ s->m_len = 1;
+#ifdef SWD_BEST_OFF
+ if (s->use_best_off)
+ memset(s->best_pos,0,sizeof(s->best_pos));
+#endif
+ swd_findbest(s);
+ c->m_len = s->m_len;
+ c->m_off = s->m_off;
+
+ swd_getbyte(s);
+
+ if (s->b_char < 0) {
+ c->look = 0;
+ c->m_len = 0;
+ } else {
+ c->look = s->look + 1;
+ }
+ c->bp = c->ip - c->look;
+
+ return LZO_E_OK;
+}
+
+/* this is a public functions, but there is no prototype in a header file */
+static int lzo1x_999_compress_internal(const uint8_t *in , unsigned in_len,
+ uint8_t *out, unsigned *out_len,
+ void *wrkmem,
+ unsigned good_length,
+ unsigned max_lazy,
+ unsigned max_chain,
+ uint32_t use_best_off);
+
+
+/***********************************************************************
+//
+************************************************************************/
+static uint8_t *code_match(lzo1x_999_t *c,
+ uint8_t *op, unsigned m_len, unsigned m_off)
+{
+ assert(op > c->out);
+ if (m_len == 2) {
+ assert(m_off <= M1_MAX_OFFSET);
+ assert(c->r1_lit > 0); assert(c->r1_lit < 4);
+ m_off -= 1;
+ *op++ = M1_MARKER | ((m_off & 3) << 2);
+ *op++ = m_off >> 2;
+ } else if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET) {
+ assert(m_len >= 3);
+ m_off -= 1;
+ *op++ = ((m_len - 1) << 5) | ((m_off & 7) << 2);
+ *op++ = m_off >> 3;
+ assert(op[-2] >= M2_MARKER);
+ } else if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET && c->r1_lit >= 4) {
+ assert(m_len == 3);
+ assert(m_off > M2_MAX_OFFSET);
+ m_off -= 1 + M2_MAX_OFFSET;
+ *op++ = M1_MARKER | ((m_off & 3) << 2);
+ *op++ = m_off >> 2;
+ } else if (m_off <= M3_MAX_OFFSET) {
+ assert(m_len >= 3);
+ m_off -= 1;
+ if (m_len <= M3_MAX_LEN)
+ *op++ = M3_MARKER | (m_len - 2);
+ else {
+ m_len -= M3_MAX_LEN;
+ *op++ = M3_MARKER | 0;
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ *op++ = 0;
+ }
+ assert(m_len > 0);
+ *op++ = m_len;
+ }
+ *op++ = m_off << 2;
+ *op++ = m_off >> 6;
+ } else {
+ unsigned k;
+
+ assert(m_len >= 3);
+ assert(m_off > 0x4000); assert(m_off <= 0xbfff);
+ m_off -= 0x4000;
+ k = (m_off & 0x4000) >> 11;
+ if (m_len <= M4_MAX_LEN)
+ *op++ = M4_MARKER | k | (m_len - 2);
+ else {
+ m_len -= M4_MAX_LEN;
+ *op++ = M4_MARKER | k | 0;
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ *op++ = 0;
+ }
+ assert(m_len > 0);
+ *op++ = m_len;
+ }
+ *op++ = m_off << 2;
+ *op++ = m_off >> 6;
+ }
+
+ return op;
+}
+
+
+static uint8_t *STORE_RUN(lzo1x_999_t *c, uint8_t *op,
+ const uint8_t *ii, unsigned t)
+{
+ if (op == c->out && t <= 238) {
+ *op++ = 17 + t;
+ } else if (t <= 3) {
+ op[-2] |= t;
+ } else if (t <= 18) {
+ *op++ = t - 3;
+ } else {
+ unsigned tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255) {
+ tt -= 255;
+ *op++ = 0;
+ }
+ assert(tt > 0);
+ *op++ = tt;
+ }
+ do *op++ = *ii++; while (--t > 0);
+
+ return op;
+}
+
+
+static uint8_t *code_run(lzo1x_999_t *c, uint8_t *op, const uint8_t *ii,
+ unsigned lit)
+{
+ if (lit > 0) {
+ assert(m_len >= 2);
+ op = STORE_RUN(c,op,ii,lit);
+ } else {
+ assert(m_len >= 3);
+ }
+ c->r1_lit = lit;
+
+ return op;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+static int len_of_coded_match(unsigned m_len, unsigned m_off, unsigned lit)
+{
+ int n = 4;
+
+ if (m_len < 2)
+ return -1;
+ if (m_len == 2)
+ return (m_off <= M1_MAX_OFFSET && lit > 0 && lit < 4) ? 2 : -1;
+ if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET)
+ return 2;
+ if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET && lit >= 4)
+ return 2;
+ if (m_off <= M3_MAX_OFFSET) {
+ if (m_len <= M3_MAX_LEN)
+ return 3;
+ m_len -= M3_MAX_LEN;
+ } else if (m_off <= M4_MAX_OFFSET) {
+ if (m_len <= M4_MAX_LEN)
+ return 3;
+ m_len -= M4_MAX_LEN;
+ } else
+ return -1;
+ while (m_len > 255) {
+ m_len -= 255;
+ n++;
+ }
+ return n;
+}
+
+
+static int min_gain(unsigned ahead, unsigned lit1,
+ unsigned lit2, int l1, int l2, int l3)
+{
+ int lazy_match_min_gain = 0;
+
+ assert (ahead >= 1);
+ lazy_match_min_gain += ahead;
+
+ if (lit1 <= 3)
+ lazy_match_min_gain += (lit2 <= 3) ? 0 : 2;
+ else if (lit1 <= 18)
+ lazy_match_min_gain += (lit2 <= 18) ? 0 : 1;
+
+ lazy_match_min_gain += (l2 - l1) * 2;
+ if (l3 > 0)
+ lazy_match_min_gain -= (ahead - l3) * 2;
+
+ if (lazy_match_min_gain < 0)
+ lazy_match_min_gain = 0;
+
+ return lazy_match_min_gain;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+#if defined(SWD_BEST_OFF)
+
+static void better_match(const lzo_swd_p swd,
+ unsigned *m_len, unsigned *m_off)
+{
+
+ if (*m_len <= M2_MIN_LEN)
+ return;
+
+ if (*m_off <= M2_MAX_OFFSET)
+ return;
+
+ /* M3/M4 -> M2 */
+ if (*m_off > M2_MAX_OFFSET &&
+ *m_len >= M2_MIN_LEN + 1 && *m_len <= M2_MAX_LEN + 1 &&
+ swd->best_off[*m_len-1] && swd->best_off[*m_len-1] <= M2_MAX_OFFSET)
+ {
+ *m_len = *m_len - 1;
+ *m_off = swd->best_off[*m_len];
+ return;
+ }
+
+ /* M4 -> M2 */
+ if (*m_off > M3_MAX_OFFSET &&
+ *m_len >= M4_MAX_LEN + 1 && *m_len <= M2_MAX_LEN + 2 &&
+ swd->best_off[*m_len-2] && swd->best_off[*m_len-2] <= M2_MAX_OFFSET)
+ {
+ *m_len = *m_len - 2;
+ *m_off = swd->best_off[*m_len];
+ return;
+ }
+ /* M4 -> M3 */
+ if (*m_off > M3_MAX_OFFSET &&
+ *m_len >= M4_MAX_LEN + 1 && *m_len <= M3_MAX_LEN + 1 &&
+ swd->best_off[*m_len-1] && swd->best_off[*m_len-1] <= M3_MAX_OFFSET)
+ {
+ *m_len = *m_len - 1;
+ *m_off = swd->best_off[*m_len];
+ }
+}
+
+#endif
+
+
+/***********************************************************************
+//
+************************************************************************/
+static int lzo1x_999_compress_internal(const uint8_t *in, unsigned in_len,
+ uint8_t *out, unsigned *out_len,
+ void *wrkmem,
+ unsigned good_length,
+ unsigned max_lazy,
+ unsigned max_chain,
+ uint32_t use_best_off)
+{
+ uint8_t *op;
+ const uint8_t *ii;
+ unsigned lit;
+ unsigned m_len, m_off;
+ lzo1x_999_t cc;
+ lzo1x_999_t * const c = &cc;
+ lzo_swd_p const swd = (lzo_swd_p) wrkmem;
+ int r;
+
+ c->init = 0;
+ c->ip = c->in = in;
+ c->in_end = in + in_len;
+ c->out = out;
+
+ op = out;
+ ii = c->ip; /* point to start of literal run */
+ lit = 0;
+ c->r1_lit = 0;
+
+ r = init_match(c, swd, use_best_off);
+ if (r != 0)
+ return r;
+ swd->max_chain = max_chain;
+
+ r = find_match(c, swd, 0, 0);
+ if (r != 0)
+ return r;
+
+ while (c->look > 0) {
+ unsigned ahead;
+ unsigned max_ahead;
+ int l1, l2, l3;
+
+ m_len = c->m_len;
+ m_off = c->m_off;
+
+ assert(c->bp == c->ip - c->look);
+ assert(c->bp >= in);
+ if (lit == 0)
+ ii = c->bp;
+ assert(ii + lit == c->bp);
+ assert(swd->b_char == *(c->bp));
+
+ if ( m_len < 2 ||
+ (m_len == 2 && (m_off > M1_MAX_OFFSET || lit == 0 || lit >= 4)) ||
+ /* Do not accept this match for compressed-data compatibility
+ * with LZO v1.01 and before
+ * [ might be a problem for decompress() and optimize() ]
+ */
+ (m_len == 2 && op == out) ||
+ (op == out && lit == 0))
+ {
+ /* a literal */
+ m_len = 0;
+ }
+ else if (m_len == M2_MIN_LEN) {
+ /* compression ratio improves if we code a literal in some cases */
+ if (m_off > MX_MAX_OFFSET && lit >= 4)
+ m_len = 0;
+ }
+
+ if (m_len == 0) {
+ /* a literal */
+ lit++;
+ swd->max_chain = max_chain;
+ r = find_match(c,swd,1,0);
+ assert(r == 0);
+ continue;
+ }
+
+ /* a match */
+#if defined(SWD_BEST_OFF)
+ if (swd->use_best_off)
+ better_match(swd,&m_len,&m_off);
+#endif
+
+ /* shall we try a lazy match ? */
+ ahead = 0;
+ if (m_len >= max_lazy) {
+ /* no */
+ l1 = 0;
+ max_ahead = 0;
+ } else {
+ /* yes, try a lazy match */
+ l1 = len_of_coded_match(m_len,m_off,lit);
+ assert(l1 > 0);
+ max_ahead = LZO_MIN(2, (unsigned)l1 - 1);
+ }
+
+
+ while (ahead < max_ahead && c->look > m_len) {
+ int lazy_match_min_gain;
+
+ if (m_len >= good_length)
+ swd->max_chain = max_chain >> 2;
+ else
+ swd->max_chain = max_chain;
+ r = find_match(c,swd,1,0);
+ ahead++;
+
+ assert(r == 0);
+ assert(c->look > 0);
+ assert(ii + lit + ahead == c->bp);
+
+ if (c->m_len < m_len)
+ continue;
+ if (c->m_len == m_len && c->m_off >= m_off)
+ continue;
+#if defined(SWD_BEST_OFF)
+ if (swd->use_best_off)
+ better_match(swd,&c->m_len,&c->m_off);
+#endif
+ l2 = len_of_coded_match(c->m_len,c->m_off,lit+ahead);
+ if (l2 < 0)
+ continue;
+
+ /* compressed-data compatibility [see above] */
+ l3 = (op == out) ? -1 : len_of_coded_match(ahead,m_off,lit);
+
+ lazy_match_min_gain = min_gain(ahead,lit,lit+ahead,l1,l2,l3);
+ if (c->m_len >= m_len + lazy_match_min_gain) {
+ if (l3 > 0) {
+ /* code previous run */
+ op = code_run(c,op,ii,lit);
+ lit = 0;
+ /* code shortened match */
+ op = code_match(c,op,ahead,m_off);
+ } else {
+ lit += ahead;
+ assert(ii + lit == c->bp);
+ }
+ goto lazy_match_done;
+ }
+ }
+
+ assert(ii + lit + ahead == c->bp);
+
+ /* 1 - code run */
+ op = code_run(c,op,ii,lit);
+ lit = 0;
+
+ /* 2 - code match */
+ op = code_match(c,op,m_len,m_off);
+ swd->max_chain = max_chain;
+ r = find_match(c,swd,m_len,1+ahead);
+ assert(r == 0);
+
+ lazy_match_done: ;
+ }
+
+ /* store final run */
+ if (lit > 0)
+ op = STORE_RUN(c,op,ii,lit);
+
+#if defined(LZO_EOF_CODE)
+ *op++ = M4_MARKER | 1;
+ *op++ = 0;
+ *op++ = 0;
+#endif
+
+ *out_len = op - out;
+
+ return LZO_E_OK;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+int lzo1x_999_compress_level(const uint8_t *in, unsigned in_len,
+ uint8_t *out, unsigned *out_len,
+ void *wrkmem,
+ int compression_level)
+{
+ static const struct {
+ uint16_t good_length;
+ uint16_t max_lazy;
+ uint16_t max_chain;
+ uint16_t use_best_off;
+ } c[3] = {
+ { 8, 32, 256, 0 },
+ { 32, 128, 2048, 1 },
+ { SWD_F, SWD_F, 4096, 1 } /* max. compression */
+ };
+
+ if (compression_level < 7 || compression_level > 9)
+ return LZO_E_ERROR;
+
+ compression_level -= 7;
+ return lzo1x_999_compress_internal(in, in_len, out, out_len, wrkmem,
+ c[compression_level].good_length,
+ c[compression_level].max_lazy,
+ c[compression_level].max_chain,
+ c[compression_level].use_best_off);
+}
diff --git a/archival/lzo1x_c.c b/archival/lzo1x_c.c
new file mode 100644
index 000000000..cc86f74b1
--- /dev/null
+++ b/archival/lzo1x_c.c
@@ -0,0 +1,296 @@
+/* implementation of the LZO1[XY]-1 compression algorithm
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/***********************************************************************
+// compress a block of data.
+************************************************************************/
+static NOINLINE unsigned
+do_compress(const uint8_t* in, unsigned in_len,
+ uint8_t* out, unsigned* out_len,
+ void* wrkmem)
+{
+ register const uint8_t* ip;
+ uint8_t* op;
+ const uint8_t* const in_end = in + in_len;
+ const uint8_t* const ip_end = in + in_len - M2_MAX_LEN - 5;
+ const uint8_t* ii;
+ const void* *const dict = (const void**) wrkmem;
+
+ op = out;
+ ip = in;
+ ii = ip;
+
+ ip += 4;
+ for (;;) {
+ register const uint8_t* m_pos;
+ unsigned m_off;
+ unsigned m_len;
+ unsigned dindex;
+
+ D_INDEX1(dindex,ip);
+ GINDEX(m_pos,m_off,dict,dindex,in);
+ if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
+ goto literal;
+#if 1
+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
+ goto try_match;
+ D_INDEX2(dindex,ip);
+#endif
+ GINDEX(m_pos,m_off,dict,dindex,in);
+ if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
+ goto literal;
+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
+ goto try_match;
+ goto literal;
+
+ try_match:
+#if 1 && defined(LZO_UNALIGNED_OK_2)
+ if (* (const lzo_ushortp) m_pos != * (const lzo_ushortp) ip)
+#else
+ if (m_pos[0] != ip[0] || m_pos[1] != ip[1])
+#endif
+ {
+ } else {
+ if (m_pos[2] == ip[2]) {
+#if 0
+ if (m_off <= M2_MAX_OFFSET)
+ goto match;
+ if (lit <= 3)
+ goto match;
+ if (lit == 3) { /* better compression, but slower */
+ assert(op - 2 > out); op[-2] |= (uint8_t)(3);
+ *op++ = *ii++; *op++ = *ii++; *op++ = *ii++;
+ goto code_match;
+ }
+ if (m_pos[3] == ip[3])
+#endif
+ goto match;
+ }
+ else {
+ /* still need a better way for finding M1 matches */
+#if 0
+ /* a M1 match */
+#if 0
+ if (m_off <= M1_MAX_OFFSET && lit > 0 && lit <= 3)
+#else
+ if (m_off <= M1_MAX_OFFSET && lit == 3)
+#endif
+ {
+ register unsigned t;
+
+ t = lit;
+ assert(op - 2 > out); op[-2] |= (uint8_t)(t);
+ do *op++ = *ii++; while (--t > 0);
+ assert(ii == ip);
+ m_off -= 1;
+ *op++ = (uint8_t)(M1_MARKER | ((m_off & 3) << 2));
+ *op++ = (uint8_t)(m_off >> 2);
+ ip += 2;
+ goto match_done;
+ }
+#endif
+ }
+ }
+
+ /* a literal */
+ literal:
+ UPDATE_I(dict, 0, dindex, ip, in);
+ ++ip;
+ if (ip >= ip_end)
+ break;
+ continue;
+
+ /* a match */
+match:
+ UPDATE_I(dict, 0, dindex, ip, in);
+ /* store current literal run */
+ if (pd(ip, ii) > 0) {
+ register unsigned t = pd(ip, ii);
+
+ if (t <= 3) {
+ assert(op - 2 > out);
+ op[-2] |= (uint8_t)(t);
+ }
+ else if (t <= 18)
+ *op++ = (uint8_t)(t - 3);
+ else {
+ register unsigned tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255) {
+ tt -= 255;
+ *op++ = 0;
+ }
+ assert(tt > 0);
+ *op++ = (uint8_t)(tt);
+ }
+ do *op++ = *ii++; while (--t > 0);
+ }
+
+ /* code the match */
+ assert(ii == ip);
+ ip += 3;
+ if (m_pos[3] != *ip++ || m_pos[4] != *ip++ || m_pos[5] != *ip++
+ || m_pos[6] != *ip++ || m_pos[7] != *ip++ || m_pos[8] != *ip++
+#ifdef LZO1Y
+ || m_pos[ 9] != *ip++ || m_pos[10] != *ip++ || m_pos[11] != *ip++
+ || m_pos[12] != *ip++ || m_pos[13] != *ip++ || m_pos[14] != *ip++
+#endif
+ ) {
+ --ip;
+ m_len = pd(ip, ii);
+ assert(m_len >= 3);
+ assert(m_len <= M2_MAX_LEN);
+
+ if (m_off <= M2_MAX_OFFSET) {
+ m_off -= 1;
+#if defined(LZO1X)
+ *op++ = (uint8_t)(((m_len - 1) << 5) | ((m_off & 7) << 2));
+ *op++ = (uint8_t)(m_off >> 3);
+#elif defined(LZO1Y)
+ *op++ = (uint8_t)(((m_len + 1) << 4) | ((m_off & 3) << 2));
+ *op++ = (uint8_t)(m_off >> 2);
+#endif
+ }
+ else if (m_off <= M3_MAX_OFFSET) {
+ m_off -= 1;
+ *op++ = (uint8_t)(M3_MARKER | (m_len - 2));
+ goto m3_m4_offset;
+ } else {
+#if defined(LZO1X)
+ m_off -= 0x4000;
+ assert(m_off > 0);
+ assert(m_off <= 0x7fff);
+ *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2));
+ goto m3_m4_offset;
+#elif defined(LZO1Y)
+ goto m4_match;
+#endif
+ }
+ }
+ else {
+ {
+ const uint8_t* end = in_end;
+ const uint8_t* m = m_pos + M2_MAX_LEN + 1;
+ while (ip < end && *m == *ip)
+ m++, ip++;
+ m_len = pd(ip, ii);
+ }
+ assert(m_len > M2_MAX_LEN);
+
+ if (m_off <= M3_MAX_OFFSET) {
+ m_off -= 1;
+ if (m_len <= 33)
+ *op++ = (uint8_t)(M3_MARKER | (m_len - 2));
+ else {
+ m_len -= 33;
+ *op++ = M3_MARKER | 0;
+ goto m3_m4_len;
+ }
+ } else {
+#if defined(LZO1Y)
+ m4_match:
+#endif
+ m_off -= 0x4000;
+ assert(m_off > 0);
+ assert(m_off <= 0x7fff);
+ if (m_len <= M4_MAX_LEN)
+ *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2));
+ else {
+ m_len -= M4_MAX_LEN;
+ *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11));
+ m3_m4_len:
+ while (m_len > 255) {
+ m_len -= 255;
+ *op++ = 0;
+ }
+ assert(m_len > 0);
+ *op++ = (uint8_t)(m_len);
+ }
+ }
+ m3_m4_offset:
+ *op++ = (uint8_t)((m_off & 63) << 2);
+ *op++ = (uint8_t)(m_off >> 6);
+ }
+#if 0
+ match_done:
+#endif
+ ii = ip;
+ if (ip >= ip_end)
+ break;
+ }
+
+ *out_len = pd(op, out);
+ return pd(in_end, ii);
+}
+
+/***********************************************************************
+// public entry point
+************************************************************************/
+int DO_COMPRESS(const uint8_t* in, unsigned in_len,
+ uint8_t* out, unsigned* out_len,
+ void* wrkmem)
+{
+ uint8_t* op = out;
+ unsigned t;
+
+ if (in_len <= M2_MAX_LEN + 5)
+ t = in_len;
+ else {
+ t = do_compress(in,in_len,op,out_len,wrkmem);
+ op += *out_len;
+ }
+
+ if (t > 0) {
+ const uint8_t* ii = in + in_len - t;
+
+ if (op == out && t <= 238)
+ *op++ = (uint8_t)(17 + t);
+ else if (t <= 3)
+ op[-2] |= (uint8_t)(t);
+ else if (t <= 18)
+ *op++ = (uint8_t)(t - 3);
+ else {
+ unsigned tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255) {
+ tt -= 255;
+ *op++ = 0;
+ }
+ assert(tt > 0);
+ *op++ = (uint8_t)(tt);
+ }
+ do *op++ = *ii++; while (--t > 0);
+ }
+
+ *op++ = M4_MARKER | 1;
+ *op++ = 0;
+ *op++ = 0;
+
+ *out_len = pd(op, out);
+ return 0; /*LZO_E_OK*/
+}
diff --git a/archival/lzo1x_d.c b/archival/lzo1x_d.c
new file mode 100644
index 000000000..348a85510
--- /dev/null
+++ b/archival/lzo1x_d.c
@@ -0,0 +1,420 @@
+/* implementation of the LZO1X decompression algorithm
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzo/
+
+ The LZO library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ The LZO library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include "libbb.h"
+#include "liblzo.h"
+
+/***********************************************************************
+// decompress a block of data.
+************************************************************************/
+/* safe decompression with overrun testing */
+int lzo1x_decompress_safe(const uint8_t* in, unsigned in_len,
+ uint8_t* out, unsigned* out_len,
+ void* wrkmem UNUSED_PARAM)
+{
+ register uint8_t* op;
+ register const uint8_t* ip;
+ register unsigned t;
+#if defined(COPY_DICT)
+ unsigned m_off;
+ const uint8_t* dict_end;
+#else
+ register const uint8_t* m_pos = NULL; /* possibly not needed */
+#endif
+ const uint8_t* const ip_end = in + in_len;
+#if defined(HAVE_ANY_OP)
+ uint8_t* const op_end = out + *out_len;
+#endif
+#if defined(LZO1Z)
+ unsigned last_m_off = 0;
+#endif
+
+// LZO_UNUSED(wrkmem);
+
+#if defined(COPY_DICT)
+ if (dict) {
+ if (dict_len > M4_MAX_OFFSET) {
+ dict += dict_len - M4_MAX_OFFSET;
+ dict_len = M4_MAX_OFFSET;
+ }
+ dict_end = dict + dict_len;
+ } else {
+ dict_len = 0;
+ dict_end = NULL;
+ }
+#endif /* COPY_DICT */
+
+ *out_len = 0;
+
+ op = out;
+ ip = in;
+
+ if (*ip > 17) {
+ t = *ip++ - 17;
+ if (t < 4)
+ goto match_next;
+ assert(t > 0); NEED_OP(t); NEED_IP(t+1);
+ do *op++ = *ip++; while (--t > 0);
+ goto first_literal_run;
+ }
+
+ while (TEST_IP && TEST_OP) {
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+ /* a literal run */
+ if (t == 0) {
+ NEED_IP(1);
+ while (*ip == 0) {
+ t += 255;
+ ip++;
+ NEED_IP(1);
+ }
+ t += 15 + *ip++;
+ }
+ /* copy literals */
+ assert(t > 0);
+ NEED_OP(t+3);
+ NEED_IP(t+4);
+#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
+# if !defined(LZO_UNALIGNED_OK_4)
+ if (PTR_ALIGNED2_4(op, ip))
+# endif
+ {
+ COPY4(op, ip);
+ op += 4;
+ ip += 4;
+ if (--t > 0) {
+ if (t >= 4) {
+ do {
+ COPY4(op, ip);
+ op += 4;
+ ip += 4;
+ t -= 4;
+ } while (t >= 4);
+ if (t > 0)
+ do *op++ = *ip++; while (--t > 0);
+ } else {
+ do *op++ = *ip++; while (--t > 0);
+ }
+ }
+ }
+# if !defined(LZO_UNALIGNED_OK_4)
+ else
+# endif
+#endif
+#if !defined(LZO_UNALIGNED_OK_4)
+ {
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = *ip++;
+ do *op++ = *ip++; while (--t > 0);
+ }
+#endif
+
+ first_literal_run:
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+#if defined(COPY_DICT)
+#if defined(LZO1Z)
+ m_off = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
+ last_m_off = m_off;
+#else
+ m_off = (1 + M2_MAX_OFFSET) + (t >> 2) + (*ip++ << 2);
+#endif
+ NEED_OP(3);
+ t = 3; COPY_DICT(t,m_off)
+#else /* !COPY_DICT */
+#if defined(LZO1Z)
+ t = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
+ m_pos = op - t;
+ last_m_off = t;
+#else
+ m_pos = op - (1 + M2_MAX_OFFSET);
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+#endif
+ TEST_LB(m_pos); NEED_OP(3);
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos;
+#endif /* COPY_DICT */
+ goto match_done;
+
+ /* handle matches */
+ do {
+ match:
+ if (t >= 64) { /* a M2 match */
+#if defined(COPY_DICT)
+#if defined(LZO1X)
+ m_off = 1 + ((t >> 2) & 7) + (*ip++ << 3);
+ t = (t >> 5) - 1;
+#elif defined(LZO1Y)
+ m_off = 1 + ((t >> 2) & 3) + (*ip++ << 2);
+ t = (t >> 4) - 3;
+#elif defined(LZO1Z)
+ m_off = t & 0x1f;
+ if (m_off >= 0x1c)
+ m_off = last_m_off;
+ else {
+ m_off = 1 + (m_off << 6) + (*ip++ >> 2);
+ last_m_off = m_off;
+ }
+ t = (t >> 5) - 1;
+#endif
+#else /* !COPY_DICT */
+#if defined(LZO1X)
+ m_pos = op - 1;
+ m_pos -= (t >> 2) & 7;
+ m_pos -= *ip++ << 3;
+ t = (t >> 5) - 1;
+#elif defined(LZO1Y)
+ m_pos = op - 1;
+ m_pos -= (t >> 2) & 3;
+ m_pos -= *ip++ << 2;
+ t = (t >> 4) - 3;
+#elif defined(LZO1Z)
+ {
+ unsigned off = t & 0x1f;
+ m_pos = op;
+ if (off >= 0x1c) {
+ assert(last_m_off > 0);
+ m_pos -= last_m_off;
+ } else {
+ off = 1 + (off << 6) + (*ip++ >> 2);
+ m_pos -= off;
+ last_m_off = off;
+ }
+ }
+ t = (t >> 5) - 1;
+#endif
+ TEST_LB(m_pos); assert(t > 0); NEED_OP(t+3-1);
+ goto copy_match;
+#endif /* COPY_DICT */
+ }
+ else if (t >= 32) { /* a M3 match */
+ t &= 31;
+ if (t == 0) {
+ NEED_IP(1);
+ while (*ip == 0) {
+ t += 255;
+ ip++;
+ NEED_IP(1);
+ }
+ t += 31 + *ip++;
+ }
+#if defined(COPY_DICT)
+#if defined(LZO1Z)
+ m_off = 1 + (ip[0] << 6) + (ip[1] >> 2);
+ last_m_off = m_off;
+#else
+ m_off = 1 + (ip[0] >> 2) + (ip[1] << 6);
+#endif
+#else /* !COPY_DICT */
+#if defined(LZO1Z)
+ {
+ unsigned off = 1 + (ip[0] << 6) + (ip[1] >> 2);
+ m_pos = op - off;
+ last_m_off = off;
+ }
+#elif defined(LZO_UNALIGNED_OK_2) && defined(LZO_ABI_LITTLE_ENDIAN)
+ m_pos = op - 1;
+ m_pos -= (* (const lzo_ushortp) ip) >> 2;
+#else
+ m_pos = op - 1;
+ m_pos -= (ip[0] >> 2) + (ip[1] << 6);
+#endif
+#endif /* COPY_DICT */
+ ip += 2;
+ }
+ else if (t >= 16) { /* a M4 match */
+#if defined(COPY_DICT)
+ m_off = (t & 8) << 11;
+#else /* !COPY_DICT */
+ m_pos = op;
+ m_pos -= (t & 8) << 11;
+#endif /* COPY_DICT */
+ t &= 7;
+ if (t == 0) {
+ NEED_IP(1);
+ while (*ip == 0) {
+ t += 255;
+ ip++;
+ NEED_IP(1);
+ }
+ t += 7 + *ip++;
+ }
+#if defined(COPY_DICT)
+#if defined(LZO1Z)
+ m_off += (ip[0] << 6) + (ip[1] >> 2);
+#else
+ m_off += (ip[0] >> 2) + (ip[1] << 6);
+#endif
+ ip += 2;
+ if (m_off == 0)
+ goto eof_found;
+ m_off += 0x4000;
+#if defined(LZO1Z)
+ last_m_off = m_off;
+#endif
+#else /* !COPY_DICT */
+#if defined(LZO1Z)
+ m_pos -= (ip[0] << 6) + (ip[1] >> 2);
+#elif defined(LZO_UNALIGNED_OK_2) && defined(LZO_ABI_LITTLE_ENDIAN)
+ m_pos -= (* (const lzo_ushortp) ip) >> 2;
+#else
+ m_pos -= (ip[0] >> 2) + (ip[1] << 6);
+#endif
+ ip += 2;
+ if (m_pos == op)
+ goto eof_found;
+ m_pos -= 0x4000;
+#if defined(LZO1Z)
+ last_m_off = pd((const uint8_t*)op, m_pos);
+#endif
+#endif /* COPY_DICT */
+ }
+ else { /* a M1 match */
+#if defined(COPY_DICT)
+#if defined(LZO1Z)
+ m_off = 1 + (t << 6) + (*ip++ >> 2);
+ last_m_off = m_off;
+#else
+ m_off = 1 + (t >> 2) + (*ip++ << 2);
+#endif
+ NEED_OP(2);
+ t = 2; COPY_DICT(t,m_off)
+#else /* !COPY_DICT */
+#if defined(LZO1Z)
+ t = 1 + (t << 6) + (*ip++ >> 2);
+ m_pos = op - t;
+ last_m_off = t;
+#else
+ m_pos = op - 1;
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+#endif
+ TEST_LB(m_pos); NEED_OP(2);
+ *op++ = *m_pos++;
+ *op++ = *m_pos;
+#endif /* COPY_DICT */
+ goto match_done;
+ }
+
+ /* copy match */
+#if defined(COPY_DICT)
+
+ NEED_OP(t+3-1);
+ t += 3-1; COPY_DICT(t,m_off)
+
+#else /* !COPY_DICT */
+
+ TEST_LB(m_pos); assert(t > 0); NEED_OP(t+3-1);
+#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
+# if !defined(LZO_UNALIGNED_OK_4)
+ if (t >= 2 * 4 - (3 - 1) && PTR_ALIGNED2_4(op,m_pos)) {
+ assert((op - m_pos) >= 4); /* both pointers are aligned */
+# else
+ if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) {
+# endif
+ COPY4(op,m_pos);
+ op += 4; m_pos += 4; t -= 4 - (3 - 1);
+ do {
+ COPY4(op,m_pos);
+ op += 4; m_pos += 4; t -= 4;
+ } while (t >= 4);
+ if (t > 0)
+ do *op++ = *m_pos++; while (--t > 0);
+ }
+ else
+#endif
+ {
+ copy_match:
+ *op++ = *m_pos++; *op++ = *m_pos++;
+ do *op++ = *m_pos++; while (--t > 0);
+ }
+
+#endif /* COPY_DICT */
+
+ match_done:
+#if defined(LZO1Z)
+ t = ip[-1] & 3;
+#else
+ t = ip[-2] & 3;
+#endif
+ if (t == 0)
+ break;
+
+ /* copy literals */
+ match_next:
+ assert(t > 0);
+ assert(t < 4);
+ NEED_OP(t);
+ NEED_IP(t+1);
+#if 0
+ do *op++ = *ip++; while (--t > 0);
+#else
+ *op++ = *ip++;
+ if (t > 1) {
+ *op++ = *ip++;
+ if (t > 2)
+ *op++ = *ip++;
+ }
+#endif
+ t = *ip++;
+ } while (TEST_IP && TEST_OP);
+ }
+
+//#if defined(HAVE_TEST_IP) || defined(HAVE_TEST_OP)
+ /* no EOF code was found */
+ *out_len = pd(op, out);
+ return LZO_E_EOF_NOT_FOUND;
+//#endif
+
+ eof_found:
+ assert(t == 1);
+ *out_len = pd(op, out);
+ return (ip == ip_end ? LZO_E_OK :
+ (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
+
+//#if defined(HAVE_NEED_IP)
+ input_overrun:
+ *out_len = pd(op, out);
+ return LZO_E_INPUT_OVERRUN;
+//#endif
+
+//#if defined(HAVE_NEED_OP)
+ output_overrun:
+ *out_len = pd(op, out);
+ return LZO_E_OUTPUT_OVERRUN;
+//#endif
+
+//#if defined(LZO_TEST_OVERRUN_LOOKBEHIND)
+ lookbehind_overrun:
+ *out_len = pd(op, out);
+ return LZO_E_LOOKBEHIND_OVERRUN;
+//#endif
+}
diff --git a/archival/lzop.c b/archival/lzop.c
new file mode 100644
index 000000000..a30d5e78b
--- /dev/null
+++ b/archival/lzop.c
@@ -0,0 +1,1075 @@
+/*
+ This file is part of the lzop file compressor.
+
+ Copyright (C) 1996..2003 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ http://www.oberhumer.com/opensource/lzop/
+
+ lzop and the LZO library are free software; you can redistribute them
+ and/or modify them under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ "Minimalized" for busybox by Alain Knaff
+*/
+
+#include "libbb.h"
+#include "unarchive.h"
+#include "liblzo_interface.h"
+
+/* lzo-2.03/src/lzo_ptr.h */
+#define pd(a,b) ((unsigned)((a)-(b)))
+
+#define lzo_version() LZO_VERSION
+#define lzo_sizeof_dict_t (sizeof(uint8_t*))
+
+/* lzo-2.03/include/lzo/lzo1x.h */
+#define LZO1X_1_MEM_COMPRESS (16384 * lzo_sizeof_dict_t)
+#define LZO1X_1_15_MEM_COMPRESS (32768 * lzo_sizeof_dict_t)
+#define LZO1X_999_MEM_COMPRESS (14 * 16384 * sizeof(short))
+
+/* lzo-2.03/src/lzo1x_oo.c */
+#define NO_LIT UINT_MAX
+
+/**********************************************************************/
+static void copy2(uint8_t* ip, const uint8_t* m_pos, unsigned off)
+{
+ ip[0] = m_pos[0];
+ if (off == 1)
+ ip[1] = m_pos[0];
+ else
+ ip[1] = m_pos[1];
+}
+
+static void copy3(uint8_t* ip, const uint8_t* m_pos, unsigned off)
+{
+ ip[0] = m_pos[0];
+ if (off == 1) {
+ ip[2] = ip[1] = m_pos[0];
+ }
+ else if (off == 2) {
+ ip[1] = m_pos[1];
+ ip[2] = m_pos[0];
+ }
+ else {
+ ip[1] = m_pos[1];
+ ip[2] = m_pos[2];
+ }
+}
+
+/**********************************************************************/
+// optimize a block of data.
+/**********************************************************************/
+#define TEST_IP (ip < ip_end)
+#define TEST_OP (op <= op_end)
+
+static int lzo1x_optimize(uint8_t *in, unsigned in_len,
+ uint8_t *out, unsigned *out_len,
+ void* wrkmem UNUSED_PARAM)
+{
+ uint8_t* op;
+ uint8_t* ip;
+ unsigned t;
+ uint8_t* m_pos;
+ uint8_t* const ip_end = in + in_len;
+ uint8_t* const op_end = out + *out_len;
+ uint8_t* litp = NULL;
+ unsigned lit = 0;
+ unsigned next_lit = NO_LIT;
+ unsigned nl;
+ unsigned long o_m1_a = 0, o_m1_b = 0, o_m2 = 0, o_m3_a = 0, o_m3_b = 0;
+
+// LZO_UNUSED(wrkmem);
+
+ *out_len = 0;
+
+ op = out;
+ ip = in;
+
+ if (*ip > 17) {
+ t = *ip++ - 17;
+ if (t < 4)
+ goto match_next;
+ goto first_literal_run;
+ }
+
+ while (TEST_IP && TEST_OP) {
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+ /* a literal run */
+ litp = ip - 1;
+ if (t == 0) {
+ t = 15;
+ while (*ip == 0)
+ t += 255, ip++;
+ t += *ip++;
+ }
+ lit = t + 3;
+ /* copy literals */
+ copy_literal_run:
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = *ip++;
+ first_literal_run:
+ do *op++ = *ip++; while (--t > 0);
+
+ t = *ip++;
+
+ if (t >= 16)
+ goto match;
+#if defined(LZO1X)
+ m_pos = op - 1 - 0x800;
+#elif defined(LZO1Y)
+ m_pos = op - 1 - 0x400;
+#endif
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ lit = 0;
+ goto match_done;
+
+
+ /* handle matches */
+ do {
+ if (t < 16) { /* a M1 match */
+ m_pos = op - 1;
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+
+ if (litp == NULL)
+ goto copy_m1;
+
+ nl = ip[-2] & 3;
+ /* test if a match follows */
+ if (nl == 0 && lit == 1 && ip[0] >= 16) {
+ next_lit = nl;
+ /* adjust length of previous short run */
+ lit += 2;
+ *litp = (unsigned char)((*litp & ~3) | lit);
+ /* copy over the 2 literals that replace the match */
+ copy2(ip-2, m_pos, pd(op, m_pos));
+ o_m1_a++;
+ }
+ /* test if a literal run follows */
+ else if (nl == 0 && ip[0] < 16 && ip[0] != 0 &&
+ (lit + 2 + ip[0] < 16))
+ {
+ t = *ip++;
+ /* remove short run */
+ *litp &= ~3;
+ /* copy over the 2 literals that replace the match */
+ copy2(ip-3+1,m_pos,pd(op,m_pos));
+ /* move literals 1 byte ahead */
+ litp += 2;
+ if (lit > 0)
+ memmove(litp+1, litp, lit);
+ /* insert new length of long literal run */
+ lit += 2 + t + 3;
+ *litp = (unsigned char)(lit - 3);
+
+ o_m1_b++;
+ *op++ = *m_pos++; *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ copy_m1:
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ } else {
+ match:
+ if (t >= 64) { /* a M2 match */
+ m_pos = op - 1;
+#if defined(LZO1X)
+ m_pos -= (t >> 2) & 7;
+ m_pos -= *ip++ << 3;
+ t = (t >> 5) - 1;
+#elif defined(LZO1Y)
+ m_pos -= (t >> 2) & 3;
+ m_pos -= *ip++ << 2;
+ t = (t >> 4) - 3;
+#endif
+ if (litp == NULL)
+ goto copy_m;
+
+ nl = ip[-2] & 3;
+ /* test if in beetween two long literal runs */
+ if (t == 1 && lit > 3 && nl == 0
+ && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
+ ) {
+ t = *ip++;
+ /* copy over the 3 literals that replace the match */
+ copy3(ip-1-2,m_pos,pd(op,m_pos));
+ /* set new length of previous literal run */
+ lit += 3 + t + 3;
+ *litp = (unsigned char)(lit - 3);
+ o_m2++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ } else {
+ if (t >= 32) { /* a M3 match */
+ t &= 31;
+ if (t == 0) {
+ t = 31;
+ while (*ip == 0)
+ t += 255, ip++;
+ t += *ip++;
+ }
+ m_pos = op - 1;
+ m_pos -= *ip++ >> 2;
+ m_pos -= *ip++ << 6;
+ } else { /* a M4 match */
+ m_pos = op;
+ m_pos -= (t & 8) << 11;
+ t &= 7;
+ if (t == 0) {
+ t = 7;
+ while (*ip == 0)
+ t += 255, ip++;
+ t += *ip++;
+ }
+ m_pos -= *ip++ >> 2;
+ m_pos -= *ip++ << 6;
+ if (m_pos == op)
+ goto eof_found;
+ m_pos -= 0x4000;
+ }
+ if (litp == NULL)
+ goto copy_m;
+
+ nl = ip[-2] & 3;
+ /* test if in beetween two matches */
+ if (t == 1 && lit == 0 && nl == 0 && ip[0] >= 16) {
+ next_lit = nl;
+ /* make a previous short run */
+ lit += 3;
+ *litp = (unsigned char)((*litp & ~3) | lit);
+ /* copy over the 3 literals that replace the match */
+ copy3(ip-3,m_pos,pd(op,m_pos));
+ o_m3_a++;
+ }
+ /* test if a literal run follows */
+ else if (t == 1 && lit <= 3 && nl == 0
+ && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
+ ) {
+ t = *ip++;
+ /* remove short run */
+ *litp &= ~3;
+ /* copy over the 3 literals that replace the match */
+ copy3(ip-4+1,m_pos,pd(op,m_pos));
+ /* move literals 1 byte ahead */
+ litp += 2;
+ if (lit > 0)
+ memmove(litp+1,litp,lit);
+ /* insert new length of long literal run */
+ lit += 3 + t + 3;
+ *litp = (unsigned char)(lit - 3);
+
+ o_m3_b++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ }
+ copy_m:
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ do *op++ = *m_pos++; while (--t > 0);
+ }
+
+ match_done:
+ if (next_lit == NO_LIT) {
+ t = ip[-2] & 3;
+ lit = t;
+ litp = ip - 2;
+ }
+ else
+ t = next_lit;
+ next_lit = NO_LIT;
+ if (t == 0)
+ break;
+ /* copy literals */
+ match_next:
+ do *op++ = *ip++; while (--t > 0);
+ t = *ip++;
+ } while (TEST_IP && TEST_OP);
+ }
+
+ /* no EOF code was found */
+ *out_len = pd(op, out);
+ return LZO_E_EOF_NOT_FOUND;
+
+ eof_found:
+// LZO_UNUSED(o_m1_a); LZO_UNUSED(o_m1_b); LZO_UNUSED(o_m2);
+// LZO_UNUSED(o_m3_a); LZO_UNUSED(o_m3_b);
+ *out_len = pd(op, out);
+ return (ip == ip_end ? LZO_E_OK :
+ (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
+}
+
+/**********************************************************************/
+#define F_OS F_OS_UNIX
+#define F_CS F_CS_NATIVE
+
+/**********************************************************************/
+#define ADLER32_INIT_VALUE 1
+#define CRC32_INIT_VALUE 0
+
+/**********************************************************************/
+enum {
+ M_LZO1X_1 = 1,
+ M_LZO1X_1_15 = 2,
+ M_LZO1X_999 = 3,
+};
+
+/**********************************************************************/
+/* header flags */
+#define F_ADLER32_D 0x00000001L
+#define F_ADLER32_C 0x00000002L
+#define F_H_EXTRA_FIELD 0x00000040L
+#define F_H_GMTDIFF 0x00000080L
+#define F_CRC32_D 0x00000100L
+#define F_CRC32_C 0x00000200L
+#define F_H_FILTER 0x00000800L
+#define F_H_CRC32 0x00001000L
+#define F_MASK 0x00003FFFL
+
+/* operating system & file system that created the file [mostly unused] */
+#define F_OS_UNIX 0x03000000L
+#define F_OS_SHIFT 24
+#define F_OS_MASK 0xff000000L
+
+/* character set for file name encoding [mostly unused] */
+#define F_CS_NATIVE 0x00000000L
+#define F_CS_SHIFT 20
+#define F_CS_MASK 0x00f00000L
+
+/* these bits must be zero */
+#define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
+
+typedef struct chksum_t {
+ uint32_t f_adler32;
+ uint32_t f_crc32;
+} chksum_t;
+
+typedef struct header_t {
+ unsigned version;
+ unsigned lib_version;
+ unsigned version_needed_to_extract;
+ uint32_t flags;
+ uint32_t mode;
+ uint32_t mtime;
+ uint32_t gmtdiff;
+ uint32_t header_checksum;
+
+ uint32_t extra_field_len;
+ uint32_t extra_field_checksum;
+
+ unsigned char method;
+ unsigned char level;
+
+ /* info */
+ char name[255+1];
+} header_t;
+
+struct globals {
+ const uint32_t *lzo_crc32_table;
+ chksum_t chksum_in;
+ chksum_t chksum_out;
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define INIT_G() do { } while (0)
+//#define G (*ptr_to_globals)
+//#define INIT_G() do {
+// SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
+//} while (0)
+
+
+/**********************************************************************/
+#define LZOP_VERSION 0x1010
+//#define LZOP_VERSION_STRING "1.01"
+//#define LZOP_VERSION_DATE "Apr 27th 2003"
+
+#define OPTION_STRING "cfvdt123456789CF"
+
+enum {
+ OPT_STDOUT = (1 << 0),
+ OPT_FORCE = (1 << 1),
+ OPT_VERBOSE = (1 << 2),
+ OPT_DECOMPRESS = (1 << 3),
+ OPT_TEST = (1 << 4),
+ OPT_1 = (1 << 5),
+ OPT_2 = (1 << 6),
+ OPT_3 = (1 << 7),
+ OPT_4 = (1 << 8),
+ OPT_5 = (1 << 9),
+ OPT_6 = (1 << 10),
+ OPT_789 = (7 << 11),
+ OPT_7 = (1 << 11),
+ OPT_8 = (1 << 12),
+ OPT_C = (1 << 14),
+ OPT_F = (1 << 15),
+};
+
+/**********************************************************************/
+// adler32 checksum
+// adapted from free code by Mark Adler <madler@alumni.caltech.edu>
+// see http://www.zlib.org/
+/**********************************************************************/
+static FAST_FUNC uint32_t
+lzo_adler32(uint32_t adler, const uint8_t* buf, unsigned len)
+{
+ enum {
+ LZO_BASE = 65521, /* largest prime smaller than 65536 */
+ /* NMAX is the largest n such that
+ * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+ LZO_NMAX = 5552,
+ };
+ uint32_t s1 = adler & 0xffff;
+ uint32_t s2 = (adler >> 16) & 0xffff;
+ unsigned k;
+
+ if (buf == NULL)
+ return 1;
+
+ while (len > 0) {
+ k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
+ len -= k;
+ if (k != 0) do {
+ s1 += *buf++;
+ s2 += s1;
+ } while (--k > 0);
+ s1 %= LZO_BASE;
+ s2 %= LZO_BASE;
+ }
+ return (s2 << 16) | s1;
+}
+
+static FAST_FUNC uint32_t
+lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
+{
+ uint32_t crc;
+
+ if (buf == NULL)
+ return 0;
+
+ crc = ~c;
+ if (len != 0) do {
+ crc = G.lzo_crc32_table[((int)crc ^ *buf) & 0xff] ^ (crc >> 8);
+ buf += 1;
+ len -= 1;
+ } while (len > 0);
+
+ return ~crc;
+}
+
+/**********************************************************************/
+static void init_chksum(chksum_t *ct)
+{
+ ct->f_adler32 = ADLER32_INIT_VALUE;
+ ct->f_crc32 = CRC32_INIT_VALUE;
+}
+
+static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
+{
+ /* We need to handle the two checksums at once, because at the
+ * beginning of the header, we don't know yet which one we'll
+ * eventually need */
+ ct->f_adler32 = lzo_adler32(ct->f_adler32, (const uint8_t*)buf, cnt);
+ ct->f_crc32 = lzo_crc32(ct->f_crc32, (const uint8_t*)buf, cnt);
+}
+
+static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
+{
+ return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
+}
+
+/**********************************************************************/
+static uint32_t read32(void)
+{
+ uint32_t v;
+ xread(0, &v, 4);
+ return ntohl(v);
+}
+
+static void write32(uint32_t v)
+{
+ v = htonl(v);
+ xwrite(1, &v, 4);
+}
+
+static void f_write(const void* buf, int cnt)
+{
+ xwrite(1, buf, cnt);
+ add_bytes_to_chksum(&G.chksum_out, buf, cnt);
+}
+
+static void f_read(void* buf, int cnt)
+{
+ xread(0, buf, cnt);
+ add_bytes_to_chksum(&G.chksum_in, buf, cnt);
+}
+
+static int f_read8(void)
+{
+ uint8_t v;
+ f_read(&v, 1);
+ return v;
+}
+
+static void f_write8(uint8_t v)
+{
+ f_write(&v, 1);
+}
+
+static unsigned f_read16(void)
+{
+ uint16_t v;
+ f_read(&v, 2);
+ return ntohs(v);
+}
+
+static void f_write16(uint16_t v)
+{
+ v = htons(v);
+ f_write(&v, 2);
+}
+
+static uint32_t f_read32(void)
+{
+ uint32_t v;
+ f_read(&v, 4);
+ return ntohl(v);
+}
+
+static void f_write32(uint32_t v)
+{
+ v = htonl(v);
+ f_write(&v, 4);
+}
+
+/**********************************************************************/
+static int lzo_get_method(header_t *h)
+{
+ /* check method */
+ if (h->method == M_LZO1X_1) {
+ if (h->level == 0)
+ h->level = 3;
+ } else if (h->method == M_LZO1X_1_15) {
+ if (h->level == 0)
+ h->level = 1;
+ } else if (h->method == M_LZO1X_999) {
+ if (h->level == 0)
+ h->level = 9;
+ } else
+ return -1; /* not a LZO method */
+
+ /* check compression level */
+ if (h->level < 1 || h->level > 9)
+ return 15;
+
+ return 0;
+}
+
+/**********************************************************************/
+#define LZO_BLOCK_SIZE (256 * 1024l)
+#define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
+
+/* LZO may expand uncompressible data by a small amount */
+#define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
+
+/**********************************************************************/
+// compress a file
+/**********************************************************************/
+static smallint lzo_compress(const header_t *h)
+{
+ unsigned block_size = LZO_BLOCK_SIZE;
+ int r = 0; /* LZO_E_OK */
+ uint8_t *const b1 = xzalloc(block_size);
+ uint8_t *const b2 = xzalloc(MAX_COMPRESSED_SIZE(block_size));
+ unsigned src_len = 0, dst_len = 0;
+ uint32_t d_adler32 = ADLER32_INIT_VALUE;
+ uint32_t d_crc32 = CRC32_INIT_VALUE;
+ int l;
+ smallint ok = 1;
+ uint8_t *wrk_mem = NULL;
+
+ if (h->method == M_LZO1X_1)
+ wrk_mem = xzalloc(LZO1X_1_MEM_COMPRESS);
+ else if (h->method == M_LZO1X_1_15)
+ wrk_mem = xzalloc(LZO1X_1_15_MEM_COMPRESS);
+ else if (h->method == M_LZO1X_999)
+ wrk_mem = xzalloc(LZO1X_999_MEM_COMPRESS);
+
+ for (;;) {
+ /* read a block */
+ l = full_read(0, b1, block_size);
+ src_len = (l > 0 ? l : 0);
+
+ /* write uncompressed block size */
+ write32(src_len);
+
+ /* exit if last block */
+ if (src_len == 0)
+ break;
+
+ /* compute checksum of uncompressed block */
+ if (h->flags & F_ADLER32_D)
+ d_adler32 = lzo_adler32(ADLER32_INIT_VALUE, b1, src_len);
+ if (h->flags & F_CRC32_D)
+ d_crc32 = lzo_crc32(CRC32_INIT_VALUE, b1, src_len);
+
+ /* compress */
+ if (h->method == M_LZO1X_1)
+ r = lzo1x_1_compress(b1, src_len, b2, &dst_len, wrk_mem);
+ else if (h->method == M_LZO1X_1_15)
+ r = lzo1x_1_15_compress(b1, src_len, b2, &dst_len, wrk_mem);
+#if ENABLE_LZOP_COMPR_HIGH
+ else if (h->method == M_LZO1X_999)
+ r = lzo1x_999_compress_level(b1, src_len, b2, &dst_len,
+ wrk_mem, h->level);
+#endif
+ else
+ bb_error_msg_and_die("internal error");
+
+ if (r != 0) /* not LZO_E_OK */
+ bb_error_msg_and_die("internal error - compression failed");
+
+ /* write compressed block size */
+ if (dst_len < src_len) {
+ /* optimize */
+ if (h->method == M_LZO1X_999) {
+ unsigned new_len = src_len;
+ r = lzo1x_optimize(b2, dst_len, b1, &new_len, NULL);
+ if (r != 0 /*LZO_E_OK*/ || new_len != src_len)
+ bb_error_msg_and_die("internal error - optimization failed");
+ }
+ write32(dst_len);
+ } else {
+ /* data actually expanded => store data uncompressed */
+ write32(src_len);
+ }
+
+ /* write checksum of uncompressed block */
+ if (h->flags & F_ADLER32_D)
+ write32(d_adler32);
+ if (h->flags & F_CRC32_D)
+ write32(d_crc32);
+
+ if (dst_len < src_len) {
+ /* write checksum of compressed block */
+ if (h->flags & F_ADLER32_C)
+ write32(lzo_adler32(ADLER32_INIT_VALUE, b2,
+ dst_len));
+ if (h->flags & F_CRC32_C)
+ write32(lzo_crc32(CRC32_INIT_VALUE, b2, dst_len));
+ /* write compressed block data */
+ xwrite(1, b2, dst_len);
+ } else {
+ /* write uncompressed block data */
+ xwrite(1, b1, src_len);
+ }
+ }
+
+ free(wrk_mem);
+ free(b1);
+ free(b2);
+ return ok;
+}
+
+static void lzo_check(uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
+ uint32_t ref, uint32_t init,
+ uint8_t* buf, unsigned len)
+{
+ uint32_t c = fn(init, buf, len);
+ if (c != ref)
+ bb_error_msg_and_die("checksum error");
+}
+
+/**********************************************************************/
+// decompress a file
+/**********************************************************************/
+static smallint lzo_decompress(const header_t *h)
+{
+ unsigned block_size = LZO_BLOCK_SIZE;
+ int r;
+ uint32_t src_len, dst_len;
+ uint32_t c_adler32 = ADLER32_INIT_VALUE;
+ uint32_t d_adler32 = ADLER32_INIT_VALUE;
+ uint32_t c_crc32 = CRC32_INIT_VALUE, d_crc32 = CRC32_INIT_VALUE;
+ smallint ok = 1;
+ uint8_t *b1;
+ uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
+ uint8_t *b2 = NULL;
+
+ for (;;) {
+ uint8_t *dst;
+
+ /* read uncompressed block size */
+ dst_len = read32();
+
+ /* exit if last block */
+ if (dst_len == 0)
+ break;
+
+ /* error if split file */
+ if (dst_len == 0xffffffffL)
+ /* should not happen - not yet implemented */
+ bb_error_msg_and_die("this file is a split lzop file");
+
+ if (dst_len > MAX_BLOCK_SIZE)
+ bb_error_msg_and_die("lzop file corrupted");
+
+ /* read compressed block size */
+ src_len = read32();
+ if (src_len <= 0 || src_len > dst_len)
+ bb_error_msg_and_die("lzop file corrupted");
+
+ if (dst_len > block_size) {
+ if (b2) {
+//FIXME!
+ b2 = NULL;
+ free(b2);
+ }
+ block_size = dst_len;
+ mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
+ }
+
+ /* read checksum of uncompressed block */
+ if (h->flags & F_ADLER32_D)
+ d_adler32 = read32();
+ if (h->flags & F_CRC32_D)
+ d_crc32 = read32();
+
+ /* read checksum of compressed block */
+ if (src_len < dst_len) {
+ if (h->flags & F_ADLER32_C)
+ c_adler32 = read32();
+ if (h->flags & F_CRC32_C)
+ c_crc32 = read32();
+ }
+
+ if (b2 == NULL)
+ b2 = xzalloc(mcs_block_size);
+ /* read the block into the end of our buffer */
+ b1 = b2 + mcs_block_size - src_len;
+ xread(0, b1, src_len);
+
+ if (src_len < dst_len) {
+ unsigned d = dst_len;
+
+ if (!(option_mask32 & OPT_F)) {
+ /* verify checksum of compressed block */
+ if (h->flags & F_ADLER32_C)
+ lzo_check(lzo_adler32, c_adler32,
+ ADLER32_INIT_VALUE,
+ b1, src_len);
+ if (h->flags & F_CRC32_C)
+ lzo_check(lzo_crc32, c_crc32,
+ CRC32_INIT_VALUE,
+ b1, src_len);
+ }
+
+ /* decompress */
+// if (option_mask32 & OPT_F)
+// r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
+// else
+ r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
+
+ if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
+ bb_error_msg_and_die("corrupted compressed data");
+ }
+ dst = b2;
+ } else {
+ /* "stored" block => no decompression */
+ dst = b1;
+ }
+
+ if (!(option_mask32 & OPT_F)) {
+ /* verify checksum of uncompressed block */
+ if (h->flags & F_ADLER32_D)
+ lzo_check(lzo_adler32, d_adler32, ADLER32_INIT_VALUE,
+ dst, dst_len);
+ if (h->flags & F_CRC32_D)
+ lzo_check(lzo_crc32, d_crc32, CRC32_INIT_VALUE,
+ dst, dst_len);
+ }
+
+ /* write uncompressed block data */
+ xwrite(1, dst, dst_len);
+ }
+
+ free(b2);
+ return ok;
+}
+
+/**********************************************************************/
+// lzop file signature (shamelessly borrowed from PNG)
+/**********************************************************************/
+/*
+ * The first nine bytes of a lzop file always contain the following values:
+ *
+ * 0 1 2 3 4 5 6 7 8
+ * --- --- --- --- --- --- --- --- ---
+ * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
+ * (decimal) 137 76 90 79 0 13 10 26 10
+ * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
+ */
+
+/* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
+ * Only slight differences in header:
+ * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
+ * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
+ * ^^^^^ ^^^^^
+ * version lib_version
+ * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
+ * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
+ * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
+ * flags mode mtime
+ * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
+ * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
+ * ^^^^^^^^^^^
+ * chksum_out
+ * The rest is identical.
+*/
+static const unsigned char lzop_magic[9] = {
+ 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
+};
+
+/* This coding is derived from Alexander Lehmann's pngcheck code. */
+static void check_magic(void)
+{
+ unsigned char magic[sizeof(lzop_magic)];
+ xread(0, magic, sizeof(magic));
+ if (memcmp(magic, lzop_magic, sizeof(lzop_magic)) != 0)
+ bb_error_msg_and_die("bad magic number");
+}
+
+/**********************************************************************/
+// lzop file header
+/**********************************************************************/
+static void write_header(const header_t *h)
+{
+ int l;
+
+ xwrite(1, lzop_magic, sizeof(lzop_magic));
+
+ init_chksum(&G.chksum_out);
+
+ f_write16(h->version);
+ f_write16(h->lib_version);
+ f_write16(h->version_needed_to_extract);
+ f_write8(h->method);
+ f_write8(h->level);
+ f_write32(h->flags);
+ f_write32(h->mode);
+ f_write32(h->mtime);
+ f_write32(h->gmtdiff);
+
+ l = (int) strlen(h->name);
+ f_write8(l);
+ if (l)
+ f_write(h->name, l);
+
+ f_write32(chksum_getresult(&G.chksum_out, h));
+}
+
+static int read_header(header_t *h)
+{
+ int r;
+ int l;
+ uint32_t checksum;
+
+ memset(h, 0, sizeof(*h));
+ h->version_needed_to_extract = 0x0900; /* first lzop version */
+ h->level = 0;
+
+ init_chksum(&G.chksum_in);
+
+ h->version = f_read16();
+ if (h->version < 0x0900)
+ return 3;
+ h->lib_version = f_read16();
+ if (h->version >= 0x0940) {
+ h->version_needed_to_extract = f_read16();
+ if (h->version_needed_to_extract > LZOP_VERSION)
+ return 16;
+ if (h->version_needed_to_extract < 0x0900)
+ return 3;
+ }
+ h->method = f_read8();
+ if (h->version >= 0x0940)
+ h->level = f_read8();
+ h->flags = f_read32();
+ if (h->flags & F_H_FILTER)
+ return 16; /* filter not supported */
+ h->mode = f_read32();
+ h->mtime = f_read32();
+ if (h->version >= 0x0940)
+ h->gmtdiff = f_read32();
+
+ l = f_read8();
+ if (l > 0)
+ f_read(h->name, l);
+ h->name[l] = 0;
+
+ checksum = chksum_getresult(&G.chksum_in, h);
+ h->header_checksum = f_read32();
+ if (h->header_checksum != checksum)
+ return 2;
+
+ if (h->method <= 0)
+ return 14;
+ r = lzo_get_method(h);
+ if (r != 0)
+ return r;
+
+ /* check reserved flags */
+ if (h->flags & F_RESERVED)
+ return -13;
+
+ /* skip extra field [not used yet] */
+ if (h->flags & F_H_EXTRA_FIELD) {
+ uint32_t k;
+
+ /* note: the checksum also covers the length */
+ init_chksum(&G.chksum_in);
+ h->extra_field_len = f_read32();
+ for (k = 0; k < h->extra_field_len; k++)
+ f_read8();
+ checksum = chksum_getresult(&G.chksum_in, h);
+ h->extra_field_checksum = f_read32();
+ if (h->extra_field_checksum != checksum)
+ return 3;
+ }
+
+ return 0;
+}
+
+static void p_header(header_t *h)
+{
+ int r;
+
+ r = read_header(h);
+ if (r == 0)
+ return;
+ bb_error_msg_and_die("header_error %d", r);
+}
+
+/**********************************************************************/
+// compress
+/**********************************************************************/
+static void lzo_set_method(header_t *h)
+{
+ int level = 1;
+
+ if (option_mask32 & OPT_1) {
+ h->method = M_LZO1X_1_15;
+ } else if (option_mask32 & OPT_789) {
+#if ENABLE_LZOP_COMPR_HIGH
+ h->method = M_LZO1X_999;
+ if (option_mask32 & OPT_7)
+ level = 7;
+ else if (option_mask32 & OPT_8)
+ level = 8;
+ else
+ level = 9;
+#else
+ bb_error_msg_and_die("high compression not compiled in");
+#endif
+ } else { /* levels 2..6 or none (defaults to level 3) */
+ h->method = M_LZO1X_1;
+ level = 5; /* levels 2-6 are actually the same */
+ }
+
+ h->level = level;
+}
+
+static smallint do_lzo_compress(void)
+{
+ header_t header;
+
+#define h (&header)
+ memset(h, 0, sizeof(*h));
+
+ lzo_set_method(h);
+
+ h->version = (LZOP_VERSION & 0xffff);
+ h->version_needed_to_extract = 0x0940;
+ h->lib_version = lzo_version() & 0xffff;
+
+ h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
+
+ if (!(option_mask32 & OPT_F) || h->method == M_LZO1X_999) {
+ h->flags |= F_ADLER32_D;
+ if (option_mask32 & OPT_C)
+ h->flags |= F_ADLER32_C;
+ }
+ write_header(h);
+ return lzo_compress(h);
+#undef h
+}
+
+/**********************************************************************/
+// decompress
+/**********************************************************************/
+static smallint do_lzo_decompress(void)
+{
+ header_t header;
+
+ check_magic();
+ p_header(&header);
+ return lzo_decompress(&header);
+}
+
+static char* make_new_name_lzop(char *filename)
+{
+ if (option_mask32 & OPT_DECOMPRESS) {
+ char *extension = strrchr(filename, '.');
+ if (!extension || strcmp(extension + 1, "lzo") != 0)
+ return xasprintf("%s.out", filename);
+ *extension = '\0';
+ return filename;
+ }
+ return xasprintf("%s.lzo", filename);
+}
+
+static IF_DESKTOP(long long) int pack_lzop(unpack_info_t *info UNUSED_PARAM)
+{
+ if (option_mask32 & OPT_DECOMPRESS)
+ return do_lzo_decompress();
+ return do_lzo_compress();
+}
+
+int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int lzop_main(int argc UNUSED_PARAM, char **argv)
+{
+ getopt32(argv, OPTION_STRING);
+ argv += optind;
+ /* lzopcat? */
+ if (applet_name[4] == 'c')
+ option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
+ /* unlzop? */
+ if (applet_name[0] == 'u')
+ option_mask32 |= OPT_DECOMPRESS;
+
+ G.lzo_crc32_table = crc32_filltable(NULL, 0);
+ return bbunpack(argv, make_new_name_lzop, pack_lzop);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 16:05:54 +0000