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-rw-r--r--archival/lzop.c1075
1 files changed, 1075 insertions, 0 deletions
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 2024-11-13 13:51:36 +0000