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openwrt/target/linux/generic/pending-5.15/530-jffs2_make_lzma_available.patch
Felix Fietkau c7c7905bce kernel: fold lzma debloat patch into the patch adding the code 
Reduces the number of hack patches

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-09-30 13:13:51 +02:00

4582 lines
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From: Alexandros C. Couloumbis <alex@ozo.com>
Subject: fs: add jffs2/lzma support (not activated by default yet)
lede-commit: c2c88d315fa0e881f8b19da07b62859b915b11b2
Signed-off-by: Alexandros C. Couloumbis <alex@ozo.com>
---
fs/jffs2/Kconfig | 9 +
fs/jffs2/Makefile | 3 +
fs/jffs2/compr.c | 6 +
fs/jffs2/compr.h | 10 +-
fs/jffs2/compr_lzma.c | 128 +++
fs/jffs2/super.c | 33 +-
include/linux/lzma.h | 62 ++
include/linux/lzma/LzFind.h | 115 +++
include/linux/lzma/LzHash.h | 54 +
include/linux/lzma/LzmaDec.h | 231 +++++
include/linux/lzma/LzmaEnc.h | 80 ++
include/linux/lzma/Types.h | 226 +++++
include/uapi/linux/jffs2.h | 1 +
lib/Kconfig | 6 +
lib/Makefile | 12 +
lib/lzma/LzFind.c | 761 ++++++++++++++
lib/lzma/LzmaDec.c | 999 +++++++++++++++++++
lib/lzma/LzmaEnc.c | 2271 ++++++++++++++++++++++++++++++++++++++++++
lib/lzma/Makefile | 7 +
19 files changed, 5008 insertions(+), 6 deletions(-)
create mode 100644 fs/jffs2/compr_lzma.c
create mode 100644 include/linux/lzma.h
create mode 100644 include/linux/lzma/LzFind.h
create mode 100644 include/linux/lzma/LzHash.h
create mode 100644 include/linux/lzma/LzmaDec.h
create mode 100644 include/linux/lzma/LzmaEnc.h
create mode 100644 include/linux/lzma/Types.h
create mode 100644 lib/lzma/LzFind.c
create mode 100644 lib/lzma/LzmaDec.c
create mode 100644 lib/lzma/LzmaEnc.c
create mode 100644 lib/lzma/Makefile
--- a/fs/jffs2/Kconfig
+++ b/fs/jffs2/Kconfig
@@ -136,6 +136,15 @@ config JFFS2_LZO
This feature was added in July, 2007. Say 'N' if you need
compatibility with older bootloaders or kernels.
+config JFFS2_LZMA
+ bool "JFFS2 LZMA compression support" if JFFS2_COMPRESSION_OPTIONS
+ select LZMA_COMPRESS
+ select LZMA_DECOMPRESS
+ depends on JFFS2_FS
+ default n
+ help
+ JFFS2 wrapper to the LZMA C SDK
+
config JFFS2_RTIME
bool "JFFS2 RTIME compression support" if JFFS2_COMPRESSION_OPTIONS
depends on JFFS2_FS
--- a/fs/jffs2/Makefile
+++ b/fs/jffs2/Makefile
@@ -19,4 +19,7 @@ jffs2-$(CONFIG_JFFS2_RUBIN) += compr_rub
jffs2-$(CONFIG_JFFS2_RTIME) += compr_rtime.o
jffs2-$(CONFIG_JFFS2_ZLIB) += compr_zlib.o
jffs2-$(CONFIG_JFFS2_LZO) += compr_lzo.o
+jffs2-$(CONFIG_JFFS2_LZMA) += compr_lzma.o
jffs2-$(CONFIG_JFFS2_SUMMARY) += summary.o
+
+CFLAGS_compr_lzma.o += -Iinclude/linux -Ilib/lzma
--- a/fs/jffs2/compr.c
+++ b/fs/jffs2/compr.c
@@ -378,6 +378,9 @@ int __init jffs2_compressors_init(void)
#ifdef CONFIG_JFFS2_LZO
jffs2_lzo_init();
#endif
+#ifdef CONFIG_JFFS2_LZMA
+ jffs2_lzma_init();
+#endif
/* Setting default compression mode */
#ifdef CONFIG_JFFS2_CMODE_NONE
jffs2_compression_mode = JFFS2_COMPR_MODE_NONE;
@@ -401,6 +404,9 @@ int __init jffs2_compressors_init(void)
int jffs2_compressors_exit(void)
{
/* Unregistering compressors */
+#ifdef CONFIG_JFFS2_LZMA
+ jffs2_lzma_exit();
+#endif
#ifdef CONFIG_JFFS2_LZO
jffs2_lzo_exit();
#endif
--- a/fs/jffs2/compr.h
+++ b/fs/jffs2/compr.h
@@ -29,9 +29,9 @@
#define JFFS2_DYNRUBIN_PRIORITY 20
#define JFFS2_LZARI_PRIORITY 30
#define JFFS2_RTIME_PRIORITY 50
-#define JFFS2_ZLIB_PRIORITY 60
-#define JFFS2_LZO_PRIORITY 80
-
+#define JFFS2_LZMA_PRIORITY 70
+#define JFFS2_ZLIB_PRIORITY 80
+#define JFFS2_LZO_PRIORITY 90
#define JFFS2_RUBINMIPS_DISABLED /* RUBINs will be used only */
#define JFFS2_DYNRUBIN_DISABLED /* for decompression */
@@ -101,5 +101,9 @@ void jffs2_zlib_exit(void);
int jffs2_lzo_init(void);
void jffs2_lzo_exit(void);
#endif
+#ifdef CONFIG_JFFS2_LZMA
+int jffs2_lzma_init(void);
+void jffs2_lzma_exit(void);
+#endif
#endif /* __JFFS2_COMPR_H__ */
--- /dev/null
+++ b/fs/jffs2/compr_lzma.c
@@ -0,0 +1,128 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * JFFS2 wrapper to the LZMA C SDK
+ *
+ */
+
+#include <linux/lzma.h>
+#include "compr.h"
+
+#ifdef __KERNEL__
+ static DEFINE_MUTEX(deflate_mutex);
+#endif
+
+CLzmaEncHandle *p;
+Byte propsEncoded[LZMA_PROPS_SIZE];
+SizeT propsSize = sizeof(propsEncoded);
+
+STATIC void lzma_free_workspace(void)
+{
+ LzmaEnc_Destroy(p, &lzma_alloc, &lzma_alloc);
+}
+
+STATIC int INIT lzma_alloc_workspace(CLzmaEncProps *props)
+{
+ if ((p = (CLzmaEncHandle *)LzmaEnc_Create(&lzma_alloc)) == NULL)
+ {
+ PRINT_ERROR("Failed to allocate lzma deflate workspace\n");
+ return -ENOMEM;
+ }
+
+ if (LzmaEnc_SetProps(p, props) != SZ_OK)
+ {
+ lzma_free_workspace();
+ return -1;
+ }
+
+ if (LzmaEnc_WriteProperties(p, propsEncoded, &propsSize) != SZ_OK)
+ {
+ lzma_free_workspace();
+ return -1;
+ }
+
+ return 0;
+}
+
+STATIC int jffs2_lzma_compress(unsigned char *data_in, unsigned char *cpage_out,
+ uint32_t *sourcelen, uint32_t *dstlen)
+{
+ SizeT compress_size = (SizeT)(*dstlen);
+ int ret;
+
+ #ifdef __KERNEL__
+ mutex_lock(&deflate_mutex);
+ #endif
+
+ ret = LzmaEnc_MemEncode(p, cpage_out, &compress_size, data_in, *sourcelen,
+ 0, NULL, &lzma_alloc, &lzma_alloc);
+
+ #ifdef __KERNEL__
+ mutex_unlock(&deflate_mutex);
+ #endif
+
+ if (ret != SZ_OK)
+ return -1;
+
+ *dstlen = (uint32_t)compress_size;
+
+ return 0;
+}
+
+STATIC int jffs2_lzma_decompress(unsigned char *data_in, unsigned char *cpage_out,
+ uint32_t srclen, uint32_t destlen)
+{
+ int ret;
+ SizeT dl = (SizeT)destlen;
+ SizeT sl = (SizeT)srclen;
+ ELzmaStatus status;
+
+ ret = LzmaDecode(cpage_out, &dl, data_in, &sl, propsEncoded,
+ propsSize, LZMA_FINISH_ANY, &status, &lzma_alloc);
+
+ if (ret != SZ_OK || status == LZMA_STATUS_NOT_FINISHED || dl != (SizeT)destlen)
+ return -1;
+
+ return 0;
+}
+
+static struct jffs2_compressor jffs2_lzma_comp = {
+ .priority = JFFS2_LZMA_PRIORITY,
+ .name = "lzma",
+ .compr = JFFS2_COMPR_LZMA,
+ .compress = &jffs2_lzma_compress,
+ .decompress = &jffs2_lzma_decompress,
+ .disabled = 0,
+};
+
+int INIT jffs2_lzma_init(void)
+{
+ int ret;
+ CLzmaEncProps props;
+ LzmaEncProps_Init(&props);
+
+ props.dictSize = LZMA_BEST_DICT(0x2000);
+ props.level = LZMA_BEST_LEVEL;
+ props.lc = LZMA_BEST_LC;
+ props.lp = LZMA_BEST_LP;
+ props.pb = LZMA_BEST_PB;
+ props.fb = LZMA_BEST_FB;
+
+ ret = lzma_alloc_workspace(&props);
+ if (ret < 0)
+ return ret;
+
+ ret = jffs2_register_compressor(&jffs2_lzma_comp);
+ if (ret)
+ lzma_free_workspace();
+
+ return ret;
+}
+
+void jffs2_lzma_exit(void)
+{
+ jffs2_unregister_compressor(&jffs2_lzma_comp);
+ lzma_free_workspace();
+}
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -374,14 +374,41 @@ static int __init init_jffs2_fs(void)
BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68);
BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32);
- pr_info("version 2.2."
+ pr_info("version 2.2"
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
" (NAND)"
#endif
#ifdef CONFIG_JFFS2_SUMMARY
- " (SUMMARY) "
+ " (SUMMARY)"
#endif
- " © 2001-2006 Red Hat, Inc.\n");
+#ifdef CONFIG_JFFS2_ZLIB
+ " (ZLIB)"
+#endif
+#ifdef CONFIG_JFFS2_LZO
+ " (LZO)"
+#endif
+#ifdef CONFIG_JFFS2_LZMA
+ " (LZMA)"
+#endif
+#ifdef CONFIG_JFFS2_RTIME
+ " (RTIME)"
+#endif
+#ifdef CONFIG_JFFS2_RUBIN
+ " (RUBIN)"
+#endif
+#ifdef CONFIG_JFFS2_CMODE_NONE
+ " (CMODE_NONE)"
+#endif
+#ifdef CONFIG_JFFS2_CMODE_PRIORITY
+ " (CMODE_PRIORITY)"
+#endif
+#ifdef CONFIG_JFFS2_CMODE_SIZE
+ " (CMODE_SIZE)"
+#endif
+#ifdef CONFIG_JFFS2_CMODE_FAVOURLZO
+ " (CMODE_FAVOURLZO)"
+#endif
+ " (c) 2001-2006 Red Hat, Inc.\n");
jffs2_inode_cachep = kmem_cache_create("jffs2_i",
sizeof(struct jffs2_inode_info),
--- /dev/null
+++ b/include/linux/lzma.h
@@ -0,0 +1,62 @@
+#ifndef __LZMA_H__
+#define __LZMA_H__
+
+#ifdef __KERNEL__
+ #include <linux/kernel.h>
+ #include <linux/sched.h>
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
+ #include <linux/init.h>
+ #define LZMA_MALLOC vmalloc
+ #define LZMA_FREE vfree
+ #define PRINT_ERROR(msg) printk(KERN_WARNING #msg)
+ #define INIT __init
+ #define STATIC static
+#else
+ #include <stdint.h>
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <unistd.h>
+ #include <string.h>
+ #include <asm/types.h>
+ #include <errno.h>
+ #include <linux/jffs2.h>
+ #ifndef PAGE_SIZE
+ extern int page_size;
+ #define PAGE_SIZE page_size
+ #endif
+ #define LZMA_MALLOC malloc
+ #define LZMA_FREE free
+ #define PRINT_ERROR(msg) fprintf(stderr, msg)
+ #define INIT
+ #define STATIC
+#endif
+
+#include "lzma/LzmaDec.h"
+#include "lzma/LzmaEnc.h"
+
+#define LZMA_BEST_LEVEL (9)
+#define LZMA_BEST_LC (0)
+#define LZMA_BEST_LP (0)
+#define LZMA_BEST_PB (0)
+#define LZMA_BEST_FB (273)
+
+#define LZMA_BEST_DICT(n) (((int)((n) / 2)) * 2)
+
+static void *p_lzma_malloc(void *p, size_t size)
+{
+ if (size == 0)
+ return NULL;
+
+ return LZMA_MALLOC(size);
+}
+
+static void p_lzma_free(void *p, void *address)
+{
+ if (address != NULL)
+ LZMA_FREE(address);
+}
+
+static ISzAlloc lzma_alloc = {p_lzma_malloc, p_lzma_free};
+
+#endif
--- /dev/null
+++ b/include/linux/lzma/LzFind.h
@@ -0,0 +1,98 @@
+/* LzFind.h -- Match finder for LZ algorithms
+2009-04-22 : Igor Pavlov : Public domain */
+
+#ifndef __LZ_FIND_H
+#define __LZ_FIND_H
+
+#include "Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef UInt32 CLzRef;
+
+typedef struct _CMatchFinder
+{
+ Byte *buffer;
+ UInt32 pos;
+ UInt32 posLimit;
+ UInt32 streamPos;
+ UInt32 lenLimit;
+
+ UInt32 cyclicBufferPos;
+ UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
+
+ UInt32 matchMaxLen;
+ CLzRef *hash;
+ CLzRef *son;
+ UInt32 hashMask;
+ UInt32 cutValue;
+
+ Byte *bufferBase;
+ ISeqInStream *stream;
+ int streamEndWasReached;
+
+ UInt32 blockSize;
+ UInt32 keepSizeBefore;
+ UInt32 keepSizeAfter;
+
+ UInt32 numHashBytes;
+ int directInput;
+ size_t directInputRem;
+ int btMode;
+ int bigHash;
+ UInt32 historySize;
+ UInt32 fixedHashSize;
+ UInt32 hashSizeSum;
+ UInt32 numSons;
+ SRes result;
+ UInt32 crc[256];
+} CMatchFinder;
+
+#define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
+#define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(Int32)(index)])
+
+#define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
+
+void MatchFinder_Construct(CMatchFinder *p);
+
+/* Conditions:
+ historySize <= 3 GB
+ keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB
+*/
+int MatchFinder_Create(CMatchFinder *p, UInt32 historySize,
+ UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
+ ISzAlloc *alloc);
+void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
+
+/*
+Conditions:
+ Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.
+ Mf_GetPointerToCurrentPos_Func's result must be used only before any other function
+*/
+
+typedef void (*Mf_Init_Func)(void *object);
+typedef Byte (*Mf_GetIndexByte_Func)(void *object, Int32 index);
+typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object);
+typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object);
+typedef UInt32 (*Mf_GetMatches_Func)(void *object, UInt32 *distances);
+typedef void (*Mf_Skip_Func)(void *object, UInt32);
+
+typedef struct _IMatchFinder
+{
+ Mf_Init_Func Init;
+ Mf_GetIndexByte_Func GetIndexByte;
+ Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;
+ Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;
+ Mf_GetMatches_Func GetMatches;
+ Mf_Skip_Func Skip;
+} IMatchFinder;
+
+void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/include/linux/lzma/LzHash.h
@@ -0,0 +1,54 @@
+/* LzHash.h -- HASH functions for LZ algorithms
+2009-02-07 : Igor Pavlov : Public domain */
+
+#ifndef __LZ_HASH_H
+#define __LZ_HASH_H
+
+#define kHash2Size (1 << 10)
+#define kHash3Size (1 << 16)
+#define kHash4Size (1 << 20)
+
+#define kFix3HashSize (kHash2Size)
+#define kFix4HashSize (kHash2Size + kHash3Size)
+#define kFix5HashSize (kHash2Size + kHash3Size + kHash4Size)
+
+#define HASH2_CALC hashValue = cur[0] | ((UInt32)cur[1] << 8);
+
+#define HASH3_CALC { \
+ UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
+ hash2Value = temp & (kHash2Size - 1); \
+ hashValue = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; }
+
+#define HASH4_CALC { \
+ UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
+ hash2Value = temp & (kHash2Size - 1); \
+ hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+ hashValue = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & p->hashMask; }
+
+#define HASH5_CALC { \
+ UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
+ hash2Value = temp & (kHash2Size - 1); \
+ hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+ hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)); \
+ hashValue = (hash4Value ^ (p->crc[cur[4]] << 3)) & p->hashMask; \
+ hash4Value &= (kHash4Size - 1); }
+
+/* #define HASH_ZIP_CALC hashValue = ((cur[0] | ((UInt32)cur[1] << 8)) ^ p->crc[cur[2]]) & 0xFFFF; */
+#define HASH_ZIP_CALC hashValue = ((cur[2] | ((UInt32)cur[0] << 8)) ^ p->crc[cur[1]]) & 0xFFFF;
+
+
+#define MT_HASH2_CALC \
+ hash2Value = (p->crc[cur[0]] ^ cur[1]) & (kHash2Size - 1);
+
+#define MT_HASH3_CALC { \
+ UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
+ hash2Value = temp & (kHash2Size - 1); \
+ hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); }
+
+#define MT_HASH4_CALC { \
+ UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
+ hash2Value = temp & (kHash2Size - 1); \
+ hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+ hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & (kHash4Size - 1); }
+
+#endif
--- /dev/null
+++ b/include/linux/lzma/LzmaDec.h
@@ -0,0 +1,130 @@
+/* LzmaDec.h -- LZMA Decoder
+2009-02-07 : Igor Pavlov : Public domain */
+
+#ifndef __LZMA_DEC_H
+#define __LZMA_DEC_H
+
+#include "Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* #define _LZMA_PROB32 */
+/* _LZMA_PROB32 can increase the speed on some CPUs,
+ but memory usage for CLzmaDec::probs will be doubled in that case */
+
+#ifdef _LZMA_PROB32
+#define CLzmaProb UInt32
+#else
+#define CLzmaProb UInt16
+#endif
+
+
+/* ---------- LZMA Properties ---------- */
+
+#define LZMA_PROPS_SIZE 5
+
+typedef struct _CLzmaProps
+{
+ unsigned lc, lp, pb;
+ UInt32 dicSize;
+} CLzmaProps;
+
+
+/* ---------- LZMA Decoder state ---------- */
+
+/* LZMA_REQUIRED_INPUT_MAX = number of required input bytes for worst case.
+ Num bits = log2((2^11 / 31) ^ 22) + 26 < 134 + 26 = 160; */
+
+#define LZMA_REQUIRED_INPUT_MAX 20
+
+typedef struct
+{
+ CLzmaProps prop;
+ CLzmaProb *probs;
+ Byte *dic;
+ const Byte *buf;
+ UInt32 range, code;
+ SizeT dicPos;
+ SizeT dicBufSize;
+ UInt32 processedPos;
+ UInt32 checkDicSize;
+ unsigned state;
+ UInt32 reps[4];
+ unsigned remainLen;
+ int needFlush;
+ int needInitState;
+ UInt32 numProbs;
+ unsigned tempBufSize;
+ Byte tempBuf[LZMA_REQUIRED_INPUT_MAX];
+} CLzmaDec;
+
+#define LzmaDec_Construct(p) { (p)->dic = 0; (p)->probs = 0; }
+
+/* There are two types of LZMA streams:
+ 0) Stream with end mark. That end mark adds about 6 bytes to compressed size.
+ 1) Stream without end mark. You must know exact uncompressed size to decompress such stream. */
+
+typedef enum
+{
+ LZMA_FINISH_ANY, /* finish at any point */
+ LZMA_FINISH_END /* block must be finished at the end */
+} ELzmaFinishMode;
+
+/* ELzmaFinishMode has meaning only if the decoding reaches output limit !!!
+
+ You must use LZMA_FINISH_END, when you know that current output buffer
+ covers last bytes of block. In other cases you must use LZMA_FINISH_ANY.
+
+ If LZMA decoder sees end marker before reaching output limit, it returns SZ_OK,
+ and output value of destLen will be less than output buffer size limit.
+ You can check status result also.
+
+ You can use multiple checks to test data integrity after full decompression:
+ 1) Check Result and "status" variable.
+ 2) Check that output(destLen) = uncompressedSize, if you know real uncompressedSize.
+ 3) Check that output(srcLen) = compressedSize, if you know real compressedSize.
+ You must use correct finish mode in that case. */
+
+typedef enum
+{
+ LZMA_STATUS_NOT_SPECIFIED, /* use main error code instead */
+ LZMA_STATUS_FINISHED_WITH_MARK, /* stream was finished with end mark. */
+ LZMA_STATUS_NOT_FINISHED, /* stream was not finished */
+ LZMA_STATUS_NEEDS_MORE_INPUT, /* you must provide more input bytes */
+ LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK /* there is probability that stream was finished without end mark */
+} ELzmaStatus;
+
+/* ELzmaStatus is used only as output value for function call */
+
+/* ---------- One Call Interface ---------- */
+
+/* LzmaDecode
+
+finishMode:
+ It has meaning only if the decoding reaches output limit (*destLen).
+ LZMA_FINISH_ANY - Decode just destLen bytes.
+ LZMA_FINISH_END - Stream must be finished after (*destLen).
+
+Returns:
+ SZ_OK
+ status:
+ LZMA_STATUS_FINISHED_WITH_MARK
+ LZMA_STATUS_NOT_FINISHED
+ LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK
+ SZ_ERROR_DATA - Data error
+ SZ_ERROR_MEM - Memory allocation error
+ SZ_ERROR_UNSUPPORTED - Unsupported properties
+ SZ_ERROR_INPUT_EOF - It needs more bytes in input buffer (src).
+*/
+
+SRes LzmaDecode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
+ const Byte *propData, unsigned propSize, ELzmaFinishMode finishMode,
+ ELzmaStatus *status, ISzAlloc *alloc);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/include/linux/lzma/LzmaEnc.h
@@ -0,0 +1,60 @@
+/* LzmaEnc.h -- LZMA Encoder
+2009-02-07 : Igor Pavlov : Public domain */
+
+#ifndef __LZMA_ENC_H
+#define __LZMA_ENC_H
+
+#include "Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LZMA_PROPS_SIZE 5
+
+typedef struct _CLzmaEncProps
+{
+ int level; /* 0 <= level <= 9 */
+ UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
+ (1 << 12) <= dictSize <= (1 << 30) for 64-bit version
+ default = (1 << 24) */
+ int lc; /* 0 <= lc <= 8, default = 3 */
+ int lp; /* 0 <= lp <= 4, default = 0 */
+ int pb; /* 0 <= pb <= 4, default = 2 */
+ int algo; /* 0 - fast, 1 - normal, default = 1 */
+ int fb; /* 5 <= fb <= 273, default = 32 */
+ int btMode; /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
+ int numHashBytes; /* 2, 3 or 4, default = 4 */
+ UInt32 mc; /* 1 <= mc <= (1 << 30), default = 32 */
+ unsigned writeEndMark; /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
+ int numThreads; /* 1 or 2, default = 2 */
+} CLzmaEncProps;
+
+void LzmaEncProps_Init(CLzmaEncProps *p);
+
+/* ---------- CLzmaEncHandle Interface ---------- */
+
+/* LzmaEnc_* functions can return the following exit codes:
+Returns:
+ SZ_OK - OK
+ SZ_ERROR_MEM - Memory allocation error
+ SZ_ERROR_PARAM - Incorrect paramater in props
+ SZ_ERROR_WRITE - Write callback error.
+ SZ_ERROR_PROGRESS - some break from progress callback
+ SZ_ERROR_THREAD - errors in multithreading functions (only for Mt version)
+*/
+
+typedef void * CLzmaEncHandle;
+
+CLzmaEncHandle LzmaEnc_Create(ISzAlloc *alloc);
+void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAlloc *alloc, ISzAlloc *allocBig);
+SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
+SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
+SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
+ int writeEndMark, ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/include/linux/lzma/Types.h
@@ -0,0 +1,226 @@
+/* Types.h -- Basic types
+2009-11-23 : Igor Pavlov : Public domain */
+
+#ifndef __7Z_TYPES_H
+#define __7Z_TYPES_H
+
+#include <stddef.h>
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+#ifndef EXTERN_C_BEGIN
+#ifdef __cplusplus
+#define EXTERN_C_BEGIN extern "C" {
+#define EXTERN_C_END }
+#else
+#define EXTERN_C_BEGIN
+#define EXTERN_C_END
+#endif
+#endif
+
+EXTERN_C_BEGIN
+
+#define SZ_OK 0
+
+#define SZ_ERROR_DATA 1
+#define SZ_ERROR_MEM 2
+#define SZ_ERROR_CRC 3
+#define SZ_ERROR_UNSUPPORTED 4
+#define SZ_ERROR_PARAM 5
+#define SZ_ERROR_INPUT_EOF 6
+#define SZ_ERROR_OUTPUT_EOF 7
+#define SZ_ERROR_READ 8
+#define SZ_ERROR_WRITE 9
+#define SZ_ERROR_PROGRESS 10
+#define SZ_ERROR_FAIL 11
+#define SZ_ERROR_THREAD 12
+
+#define SZ_ERROR_ARCHIVE 16
+#define SZ_ERROR_NO_ARCHIVE 17
+
+typedef int SRes;
+
+#ifdef _WIN32
+typedef DWORD WRes;
+#else
+typedef int WRes;
+#endif
+
+#ifndef RINOK
+#define RINOK(x) { int __result__ = (x); if (__result__ != 0) return __result__; }
+#endif
+
+typedef unsigned char Byte;
+typedef short Int16;
+typedef unsigned short UInt16;
+
+#ifdef _LZMA_UINT32_IS_ULONG
+typedef long Int32;
+typedef unsigned long UInt32;
+#else
+typedef int Int32;
+typedef unsigned int UInt32;
+#endif
+
+#ifdef _SZ_NO_INT_64
+
+/* define _SZ_NO_INT_64, if your compiler doesn't support 64-bit integers.
+ NOTES: Some code will work incorrectly in that case! */
+
+typedef long Int64;
+typedef unsigned long UInt64;
+
+#else
+
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+typedef __int64 Int64;
+typedef unsigned __int64 UInt64;
+#else
+typedef long long int Int64;
+typedef unsigned long long int UInt64;
+#endif
+
+#endif
+
+#ifdef _LZMA_NO_SYSTEM_SIZE_T
+typedef UInt32 SizeT;
+#else
+typedef size_t SizeT;
+#endif
+
+typedef int Bool;
+#define True 1
+#define False 0
+
+
+#ifdef _WIN32
+#define MY_STD_CALL __stdcall
+#else
+#define MY_STD_CALL
+#endif
+
+#ifdef _MSC_VER
+
+#if _MSC_VER >= 1300
+#define MY_NO_INLINE __declspec(noinline)
+#else
+#define MY_NO_INLINE
+#endif
+
+#define MY_CDECL __cdecl
+#define MY_FAST_CALL __fastcall
+
+#else
+
+#define MY_CDECL
+#define MY_FAST_CALL
+
+#endif
+
+
+/* The following interfaces use first parameter as pointer to structure */
+
+typedef struct
+{
+ SRes (*Read)(void *p, void *buf, size_t *size);
+ /* if (input(*size) != 0 && output(*size) == 0) means end_of_stream.
+ (output(*size) < input(*size)) is allowed */
+} ISeqInStream;
+
+/* it can return SZ_ERROR_INPUT_EOF */
+SRes SeqInStream_Read(ISeqInStream *stream, void *buf, size_t size);
+SRes SeqInStream_Read2(ISeqInStream *stream, void *buf, size_t size, SRes errorType);
+SRes SeqInStream_ReadByte(ISeqInStream *stream, Byte *buf);
+
+typedef struct
+{
+ size_t (*Write)(void *p, const void *buf, size_t size);
+ /* Returns: result - the number of actually written bytes.
+ (result < size) means error */
+} ISeqOutStream;
+
+typedef enum
+{
+ SZ_SEEK_SET = 0,
+ SZ_SEEK_CUR = 1,
+ SZ_SEEK_END = 2
+} ESzSeek;
+
+typedef struct
+{
+ SRes (*Read)(void *p, void *buf, size_t *size); /* same as ISeqInStream::Read */
+ SRes (*Seek)(void *p, Int64 *pos, ESzSeek origin);
+} ISeekInStream;
+
+typedef struct
+{
+ SRes (*Look)(void *p, void **buf, size_t *size);
+ /* if (input(*size) != 0 && output(*size) == 0) means end_of_stream.
+ (output(*size) > input(*size)) is not allowed
+ (output(*size) < input(*size)) is allowed */
+ SRes (*Skip)(void *p, size_t offset);
+ /* offset must be <= output(*size) of Look */
+
+ SRes (*Read)(void *p, void *buf, size_t *size);
+ /* reads directly (without buffer). It's same as ISeqInStream::Read */
+ SRes (*Seek)(void *p, Int64 *pos, ESzSeek origin);
+} ILookInStream;
+
+SRes LookInStream_LookRead(ILookInStream *stream, void *buf, size_t *size);
+SRes LookInStream_SeekTo(ILookInStream *stream, UInt64 offset);
+
+/* reads via ILookInStream::Read */
+SRes LookInStream_Read2(ILookInStream *stream, void *buf, size_t size, SRes errorType);
+SRes LookInStream_Read(ILookInStream *stream, void *buf, size_t size);
+
+#define LookToRead_BUF_SIZE (1 << 14)
+
+typedef struct
+{
+ ILookInStream s;
+ ISeekInStream *realStream;
+ size_t pos;
+ size_t size;
+ Byte buf[LookToRead_BUF_SIZE];
+} CLookToRead;
+
+void LookToRead_CreateVTable(CLookToRead *p, int lookahead);
+void LookToRead_Init(CLookToRead *p);
+
+typedef struct
+{
+ ISeqInStream s;
+ ILookInStream *realStream;
+} CSecToLook;
+
+void SecToLook_CreateVTable(CSecToLook *p);
+
+typedef struct
+{
+ ISeqInStream s;
+ ILookInStream *realStream;
+} CSecToRead;
+
+void SecToRead_CreateVTable(CSecToRead *p);
+
+typedef struct
+{
+ SRes (*Progress)(void *p, UInt64 inSize, UInt64 outSize);
+ /* Returns: result. (result != SZ_OK) means break.
+ Value (UInt64)(Int64)-1 for size means unknown value. */
+} ICompressProgress;
+
+typedef struct
+{
+ void *(*Alloc)(void *p, size_t size);
+ void (*Free)(void *p, void *address); /* address can be 0 */
+} ISzAlloc;
+
+#define IAlloc_Alloc(p, size) (p)->Alloc((p), size)
+#define IAlloc_Free(p, a) (p)->Free((p), a)
+
+EXTERN_C_END
+
+#endif
--- a/include/uapi/linux/jffs2.h
+++ b/include/uapi/linux/jffs2.h
@@ -46,6 +46,7 @@
#define JFFS2_COMPR_DYNRUBIN 0x05
#define JFFS2_COMPR_ZLIB 0x06
#define JFFS2_COMPR_LZO 0x07
+#define JFFS2_COMPR_LZMA 0x08
/* Compatibility flags. */
#define JFFS2_COMPAT_MASK 0xc000 /* What do to if an unknown nodetype is found */
#define JFFS2_NODE_ACCURATE 0x2000
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -340,6 +340,12 @@ config ZSTD_DECOMPRESS
source "lib/xz/Kconfig"
+config LZMA_COMPRESS
+ tristate
+
+config LZMA_DECOMPRESS
+ tristate
+
#
# These all provide a common interface (hence the apparent duplication with
# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -135,6 +135,16 @@ CFLAGS_kobject.o += -DDEBUG
CFLAGS_kobject_uevent.o += -DDEBUG
endif
+ifdef CONFIG_JFFS2_ZLIB
+ CONFIG_ZLIB_INFLATE:=y
+ CONFIG_ZLIB_DEFLATE:=y
+endif
+
+ifdef CONFIG_JFFS2_LZMA
+ CONFIG_LZMA_DECOMPRESS:=y
+ CONFIG_LZMA_COMPRESS:=y
+endif
+
obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
@@ -192,6 +202,8 @@ obj-$(CONFIG_ZSTD_COMPRESS) += zstd/
obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd/
obj-$(CONFIG_XZ_DEC) += xz/
obj-$(CONFIG_RAID6_PQ) += raid6/
+obj-$(CONFIG_LZMA_COMPRESS) += lzma/
+obj-$(CONFIG_LZMA_DECOMPRESS) += lzma/
lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
--- /dev/null
+++ b/lib/lzma/LzFind.c
@@ -0,0 +1,522 @@
+/* LzFind.c -- Match finder for LZ algorithms
+2009-04-22 : Igor Pavlov : Public domain */
+
+#include <string.h>
+
+#include "LzFind.h"
+#include "LzHash.h"
+
+#define kEmptyHashValue 0
+#define kMaxValForNormalize ((UInt32)0xFFFFFFFF)
+#define kNormalizeStepMin (1 << 10) /* it must be power of 2 */
+#define kNormalizeMask (~(kNormalizeStepMin - 1))
+#define kMaxHistorySize ((UInt32)3 << 30)
+
+#define kStartMaxLen 3
+
+#if 0
+#define DIRECT_INPUT p->directInput
+#else
+#define DIRECT_INPUT 1
+#endif
+
+static void LzInWindow_Free(CMatchFinder *p, ISzAlloc *alloc)
+{
+ if (!DIRECT_INPUT)
+ {
+ alloc->Free(alloc, p->bufferBase);
+ p->bufferBase = 0;
+ }
+}
+
+/* keepSizeBefore + keepSizeAfter + keepSizeReserv must be < 4G) */
+
+static int LzInWindow_Create(CMatchFinder *p, UInt32 keepSizeReserv, ISzAlloc *alloc)
+{
+ UInt32 blockSize = p->keepSizeBefore + p->keepSizeAfter + keepSizeReserv;
+ if (DIRECT_INPUT)
+ {
+ p->blockSize = blockSize;
+ return 1;
+ }
+ if (p->bufferBase == 0 || p->blockSize != blockSize)
+ {
+ LzInWindow_Free(p, alloc);
+ p->blockSize = blockSize;
+ p->bufferBase = (Byte *)alloc->Alloc(alloc, (size_t)blockSize);
+ }
+ return (p->bufferBase != 0);
+}
+
+static Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p) { return p->buffer; }
+static Byte MatchFinder_GetIndexByte(CMatchFinder *p, Int32 index) { return p->buffer[index]; }
+
+static UInt32 MatchFinder_GetNumAvailableBytes(CMatchFinder *p) { return p->streamPos - p->pos; }
+
+static void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue)
+{
+ p->posLimit -= subValue;
+ p->pos -= subValue;
+ p->streamPos -= subValue;
+}
+
+static void MatchFinder_ReadBlock(CMatchFinder *p)
+{
+ if (p->streamEndWasReached || p->result != SZ_OK)
+ return;
+ if (DIRECT_INPUT)
+ {
+ UInt32 curSize = 0xFFFFFFFF - p->streamPos;
+ if (curSize > p->directInputRem)
+ curSize = (UInt32)p->directInputRem;
+ p->directInputRem -= curSize;
+ p->streamPos += curSize;
+ if (p->directInputRem == 0)
+ p->streamEndWasReached = 1;
+ return;
+ }
+ for (;;)
+ {
+ Byte *dest = p->buffer + (p->streamPos - p->pos);
+ size_t size = (p->bufferBase + p->blockSize - dest);
+ if (size == 0)
+ return;
+ p->result = p->stream->Read(p->stream, dest, &size);
+ if (p->result != SZ_OK)
+ return;
+ if (size == 0)
+ {
+ p->streamEndWasReached = 1;
+ return;
+ }
+ p->streamPos += (UInt32)size;
+ if (p->streamPos - p->pos > p->keepSizeAfter)
+ return;
+ }
+}
+
+static void MatchFinder_MoveBlock(CMatchFinder *p)
+{
+ memmove(p->bufferBase,
+ p->buffer - p->keepSizeBefore,
+ (size_t)(p->streamPos - p->pos + p->keepSizeBefore));
+ p->buffer = p->bufferBase + p->keepSizeBefore;
+}
+
+static int MatchFinder_NeedMove(CMatchFinder *p)
+{
+ if (DIRECT_INPUT)
+ return 0;
+ /* if (p->streamEndWasReached) return 0; */
+ return ((size_t)(p->bufferBase + p->blockSize - p->buffer) <= p->keepSizeAfter);
+}
+
+static void MatchFinder_CheckAndMoveAndRead(CMatchFinder *p)
+{
+ if (MatchFinder_NeedMove(p))
+ MatchFinder_MoveBlock(p);
+ MatchFinder_ReadBlock(p);
+}
+
+static void MatchFinder_SetDefaultSettings(CMatchFinder *p)
+{
+ p->cutValue = 32;
+ p->btMode = 1;
+ p->numHashBytes = 4;
+ p->bigHash = 0;
+}
+
+#define kCrcPoly 0xEDB88320
+
+void MatchFinder_Construct(CMatchFinder *p)
+{
+ UInt32 i;
+ p->bufferBase = 0;
+ p->directInput = 0;
+ p->hash = 0;
+ MatchFinder_SetDefaultSettings(p);
+
+ for (i = 0; i < 256; i++)
+ {
+ UInt32 r = i;
+ int j;
+ for (j = 0; j < 8; j++)
+ r = (r >> 1) ^ (kCrcPoly & ~((r & 1) - 1));
+ p->crc[i] = r;
+ }
+}
+
+static void MatchFinder_FreeThisClassMemory(CMatchFinder *p, ISzAlloc *alloc)
+{
+ alloc->Free(alloc, p->hash);
+ p->hash = 0;
+}
+
+void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc)
+{
+ MatchFinder_FreeThisClassMemory(p, alloc);
+ LzInWindow_Free(p, alloc);
+}
+
+static CLzRef* AllocRefs(UInt32 num, ISzAlloc *alloc)
+{
+ size_t sizeInBytes = (size_t)num * sizeof(CLzRef);
+ if (sizeInBytes / sizeof(CLzRef) != num)
+ return 0;
+ return (CLzRef *)alloc->Alloc(alloc, sizeInBytes);
+}
+
+int MatchFinder_Create(CMatchFinder *p, UInt32 historySize,
+ UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
+ ISzAlloc *alloc)
+{
+ UInt32 sizeReserv;
+ if (historySize > kMaxHistorySize)
+ {
+ MatchFinder_Free(p, alloc);
+ return 0;
+ }
+ sizeReserv = historySize >> 1;
+ if (historySize > ((UInt32)2 << 30))
+ sizeReserv = historySize >> 2;
+ sizeReserv += (keepAddBufferBefore + matchMaxLen + keepAddBufferAfter) / 2 + (1 << 19);
+
+ p->keepSizeBefore = historySize + keepAddBufferBefore + 1;
+ p->keepSizeAfter = matchMaxLen + keepAddBufferAfter;
+ /* we need one additional byte, since we use MoveBlock after pos++ and before dictionary using */
+ if (LzInWindow_Create(p, sizeReserv, alloc))
+ {
+ UInt32 newCyclicBufferSize = historySize + 1;
+ UInt32 hs;
+ p->matchMaxLen = matchMaxLen;
+ {
+ p->fixedHashSize = 0;
+ if (p->numHashBytes == 2)
+ hs = (1 << 16) - 1;
+ else
+ {
+ hs = historySize - 1;
+ hs |= (hs >> 1);
+ hs |= (hs >> 2);
+ hs |= (hs >> 4);
+ hs |= (hs >> 8);
+ hs >>= 1;
+ hs |= 0xFFFF; /* don't change it! It's required for Deflate */
+ if (hs > (1 << 24))
+ {
+ if (p->numHashBytes == 3)
+ hs = (1 << 24) - 1;
+ else
+ hs >>= 1;
+ }
+ }
+ p->hashMask = hs;
+ hs++;
+ if (p->numHashBytes > 2) p->fixedHashSize += kHash2Size;
+ if (p->numHashBytes > 3) p->fixedHashSize += kHash3Size;
+ if (p->numHashBytes > 4) p->fixedHashSize += kHash4Size;
+ hs += p->fixedHashSize;
+ }
+
+ {
+ UInt32 prevSize = p->hashSizeSum + p->numSons;
+ UInt32 newSize;
+ p->historySize = historySize;
+ p->hashSizeSum = hs;
+ p->cyclicBufferSize = newCyclicBufferSize;
+ p->numSons = (p->btMode ? newCyclicBufferSize * 2 : newCyclicBufferSize);
+ newSize = p->hashSizeSum + p->numSons;
+ if (p->hash != 0 && prevSize == newSize)
+ return 1;
+ MatchFinder_FreeThisClassMemory(p, alloc);
+ p->hash = AllocRefs(newSize, alloc);
+ if (p->hash != 0)
+ {
+ p->son = p->hash + p->hashSizeSum;
+ return 1;
+ }
+ }
+ }
+ MatchFinder_Free(p, alloc);
+ return 0;
+}
+
+static void MatchFinder_SetLimits(CMatchFinder *p)
+{
+ UInt32 limit = kMaxValForNormalize - p->pos;
+ UInt32 limit2 = p->cyclicBufferSize - p->cyclicBufferPos;
+ if (limit2 < limit)
+ limit = limit2;
+ limit2 = p->streamPos - p->pos;
+ if (limit2 <= p->keepSizeAfter)
+ {
+ if (limit2 > 0)
+ limit2 = 1;
+ }
+ else
+ limit2 -= p->keepSizeAfter;
+ if (limit2 < limit)
+ limit = limit2;
+ {
+ UInt32 lenLimit = p->streamPos - p->pos;
+ if (lenLimit > p->matchMaxLen)
+ lenLimit = p->matchMaxLen;
+ p->lenLimit = lenLimit;
+ }
+ p->posLimit = p->pos + limit;
+}
+
+static void MatchFinder_Init(CMatchFinder *p)
+{
+ UInt32 i;
+ for (i = 0; i < p->hashSizeSum; i++)
+ p->hash[i] = kEmptyHashValue;
+ p->cyclicBufferPos = 0;
+ p->buffer = p->bufferBase;
+ p->pos = p->streamPos = p->cyclicBufferSize;
+ p->result = SZ_OK;
+ p->streamEndWasReached = 0;
+ MatchFinder_ReadBlock(p);
+ MatchFinder_SetLimits(p);
+}
+
+static UInt32 MatchFinder_GetSubValue(CMatchFinder *p)
+{
+ return (p->pos - p->historySize - 1) & kNormalizeMask;
+}
+
+static void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems)
+{
+ UInt32 i;
+ for (i = 0; i < numItems; i++)
+ {
+ UInt32 value = items[i];
+ if (value <= subValue)
+ value = kEmptyHashValue;
+ else
+ value -= subValue;
+ items[i] = value;
+ }
+}
+
+static void MatchFinder_Normalize(CMatchFinder *p)
+{
+ UInt32 subValue = MatchFinder_GetSubValue(p);
+ MatchFinder_Normalize3(subValue, p->hash, p->hashSizeSum + p->numSons);
+ MatchFinder_ReduceOffsets(p, subValue);
+}
+
+static void MatchFinder_CheckLimits(CMatchFinder *p)
+{
+ if (p->pos == kMaxValForNormalize)
+ MatchFinder_Normalize(p);
+ if (!p->streamEndWasReached && p->keepSizeAfter == p->streamPos - p->pos)
+ MatchFinder_CheckAndMoveAndRead(p);
+ if (p->cyclicBufferPos == p->cyclicBufferSize)
+ p->cyclicBufferPos = 0;
+ MatchFinder_SetLimits(p);
+}
+
+static UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
+ UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue,
+ UInt32 *distances, UInt32 maxLen)
+{
+ CLzRef *ptr0 = son + (_cyclicBufferPos << 1) + 1;
+ CLzRef *ptr1 = son + (_cyclicBufferPos << 1);
+ UInt32 len0 = 0, len1 = 0;
+ for (;;)
+ {
+ UInt32 delta = pos - curMatch;
+ if (cutValue-- == 0 || delta >= _cyclicBufferSize)
+ {
+ *ptr0 = *ptr1 = kEmptyHashValue;
+ return distances;
+ }
+ {
+ CLzRef *pair = son + ((_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
+ const Byte *pb = cur - delta;
+ UInt32 len = (len0 < len1 ? len0 : len1);
+ if (pb[len] == cur[len])
+ {
+ if (++len != lenLimit && pb[len] == cur[len])
+ while (++len != lenLimit)
+ if (pb[len] != cur[len])
+ break;
+ if (maxLen < len)
+ {
+ *distances++ = maxLen = len;
+ *distances++ = delta - 1;
+ if (len == lenLimit)
+ {
+ *ptr1 = pair[0];
+ *ptr0 = pair[1];
+ return distances;
+ }
+ }
+ }
+ if (pb[len] < cur[len])
+ {
+ *ptr1 = curMatch;
+ ptr1 = pair + 1;
+ curMatch = *ptr1;
+ len1 = len;
+ }
+ else
+ {
+ *ptr0 = curMatch;
+ ptr0 = pair;
+ curMatch = *ptr0;
+ len0 = len;
+ }
+ }
+ }
+}
+
+static void SkipMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
+ UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue)
+{
+ CLzRef *ptr0 = son + (_cyclicBufferPos << 1) + 1;
+ CLzRef *ptr1 = son + (_cyclicBufferPos << 1);
+ UInt32 len0 = 0, len1 = 0;
+ for (;;)
+ {
+ UInt32 delta = pos - curMatch;
+ if (cutValue-- == 0 || delta >= _cyclicBufferSize)
+ {
+ *ptr0 = *ptr1 = kEmptyHashValue;
+ return;
+ }
+ {
+ CLzRef *pair = son + ((_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
+ const Byte *pb = cur - delta;
+ UInt32 len = (len0 < len1 ? len0 : len1);
+ if (pb[len] == cur[len])
+ {
+ while (++len != lenLimit)
+ if (pb[len] != cur[len])
+ break;
+ {
+ if (len == lenLimit)
+ {
+ *ptr1 = pair[0];
+ *ptr0 = pair[1];
+ return;
+ }
+ }
+ }
+ if (pb[len] < cur[len])
+ {
+ *ptr1 = curMatch;
+ ptr1 = pair + 1;
+ curMatch = *ptr1;
+ len1 = len;
+ }
+ else
+ {
+ *ptr0 = curMatch;
+ ptr0 = pair;
+ curMatch = *ptr0;
+ len0 = len;
+ }
+ }
+ }
+}
+
+#define MOVE_POS \
+ ++p->cyclicBufferPos; \
+ p->buffer++; \
+ if (++p->pos == p->posLimit) MatchFinder_CheckLimits(p);
+
+static void MatchFinder_MovePos(CMatchFinder *p) { MOVE_POS; }
+
+#define MOVE_POS_RET MatchFinder_MovePos(p); return offset;
+
+#define GET_MATCHES_HEADER2(minLen, ret_op) \
+ UInt32 lenLimit; UInt32 hashValue; const Byte *cur; UInt32 curMatch; \
+ lenLimit = p->lenLimit; { if (lenLimit < minLen) { MatchFinder_MovePos(p); ret_op; }} \
+ cur = p->buffer;
+
+#define GET_MATCHES_HEADER(minLen) GET_MATCHES_HEADER2(minLen, return 0)
+#define SKIP_HEADER(minLen) GET_MATCHES_HEADER2(minLen, continue)
+
+#define MF_PARAMS(p) p->pos, p->buffer, p->son, p->cyclicBufferPos, p->cyclicBufferSize, p->cutValue
+
+#define GET_MATCHES_FOOTER(offset, maxLen) \
+ offset = (UInt32)(GetMatchesSpec1(lenLimit, curMatch, MF_PARAMS(p), \
+ distances + offset, maxLen) - distances); MOVE_POS_RET;
+
+#define SKIP_FOOTER \
+ SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p)); MatchFinder_MovePos(p);
+
+static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
+{
+ UInt32 hash2Value, hash3Value, delta2, delta3, maxLen, offset;
+ GET_MATCHES_HEADER(4)
+
+ HASH4_CALC;
+
+ delta2 = p->pos - p->hash[ hash2Value];
+ delta3 = p->pos - p->hash[kFix3HashSize + hash3Value];
+ curMatch = p->hash[kFix4HashSize + hashValue];
+
+ p->hash[ hash2Value] =
+ p->hash[kFix3HashSize + hash3Value] =
+ p->hash[kFix4HashSize + hashValue] = p->pos;
+
+ maxLen = 1;
+ offset = 0;
+ if (delta2 < p->cyclicBufferSize && *(cur - delta2) == *cur)
+ {
+ distances[0] = maxLen = 2;
+ distances[1] = delta2 - 1;
+ offset = 2;
+ }
+ if (delta2 != delta3 && delta3 < p->cyclicBufferSize && *(cur - delta3) == *cur)
+ {
+ maxLen = 3;
+ distances[offset + 1] = delta3 - 1;
+ offset += 2;
+ delta2 = delta3;
+ }
+ if (offset != 0)
+ {
+ for (; maxLen != lenLimit; maxLen++)
+ if (cur[(ptrdiff_t)maxLen - delta2] != cur[maxLen])
+ break;
+ distances[offset - 2] = maxLen;
+ if (maxLen == lenLimit)
+ {
+ SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p));
+ MOVE_POS_RET;
+ }
+ }
+ if (maxLen < 3)
+ maxLen = 3;
+ GET_MATCHES_FOOTER(offset, maxLen)
+}
+
+static void Bt4_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
+{
+ do
+ {
+ UInt32 hash2Value, hash3Value;
+ SKIP_HEADER(4)
+ HASH4_CALC;
+ curMatch = p->hash[kFix4HashSize + hashValue];
+ p->hash[ hash2Value] =
+ p->hash[kFix3HashSize + hash3Value] = p->pos;
+ p->hash[kFix4HashSize + hashValue] = p->pos;
+ SKIP_FOOTER
+ }
+ while (--num != 0);
+}
+
+void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable)
+{
+ vTable->Init = (Mf_Init_Func)MatchFinder_Init;
+ vTable->GetIndexByte = (Mf_GetIndexByte_Func)MatchFinder_GetIndexByte;
+ vTable->GetNumAvailableBytes = (Mf_GetNumAvailableBytes_Func)MatchFinder_GetNumAvailableBytes;
+ vTable->GetPointerToCurrentPos = (Mf_GetPointerToCurrentPos_Func)MatchFinder_GetPointerToCurrentPos;
+ vTable->GetMatches = (Mf_GetMatches_Func)Bt4_MatchFinder_GetMatches;
+ vTable->Skip = (Mf_Skip_Func)Bt4_MatchFinder_Skip;
+}
--- /dev/null
+++ b/lib/lzma/LzmaDec.c
@@ -0,0 +1,925 @@
+/* LzmaDec.c -- LZMA Decoder
+2009-09-20 : Igor Pavlov : Public domain */
+
+#include "LzmaDec.h"
+
+#include <string.h>
+
+#define kNumTopBits 24
+#define kTopValue ((UInt32)1 << kNumTopBits)
+
+#define kNumBitModelTotalBits 11
+#define kBitModelTotal (1 << kNumBitModelTotalBits)
+#define kNumMoveBits 5
+
+#define RC_INIT_SIZE 5
+
+#define NORMALIZE if (range < kTopValue) { range <<= 8; code = (code << 8) | (*buf++); }
+
+#define IF_BIT_0(p) ttt = *(p); NORMALIZE; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
+#define UPDATE_0(p) range = bound; *(p) = (CLzmaProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));
+#define UPDATE_1(p) range -= bound; code -= bound; *(p) = (CLzmaProb)(ttt - (ttt >> kNumMoveBits));
+#define GET_BIT2(p, i, A0, A1) IF_BIT_0(p) \
+ { UPDATE_0(p); i = (i + i); A0; } else \
+ { UPDATE_1(p); i = (i + i) + 1; A1; }
+#define GET_BIT(p, i) GET_BIT2(p, i, ; , ;)
+
+#define TREE_GET_BIT(probs, i) { GET_BIT((probs + i), i); }
+#define TREE_DECODE(probs, limit, i) \
+ { i = 1; do { TREE_GET_BIT(probs, i); } while (i < limit); i -= limit; }
+
+/* #define _LZMA_SIZE_OPT */
+
+#ifdef _LZMA_SIZE_OPT
+#define TREE_6_DECODE(probs, i) TREE_DECODE(probs, (1 << 6), i)
+#else
+#define TREE_6_DECODE(probs, i) \
+ { i = 1; \
+ TREE_GET_BIT(probs, i); \
+ TREE_GET_BIT(probs, i); \
+ TREE_GET_BIT(probs, i); \
+ TREE_GET_BIT(probs, i); \
+ TREE_GET_BIT(probs, i); \
+ TREE_GET_BIT(probs, i); \
+ i -= 0x40; }
+#endif
+
+#define NORMALIZE_CHECK if (range < kTopValue) { if (buf >= bufLimit) return DUMMY_ERROR; range <<= 8; code = (code << 8) | (*buf++); }
+
+#define IF_BIT_0_CHECK(p) ttt = *(p); NORMALIZE_CHECK; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
+#define UPDATE_0_CHECK range = bound;
+#define UPDATE_1_CHECK range -= bound; code -= bound;
+#define GET_BIT2_CHECK(p, i, A0, A1) IF_BIT_0_CHECK(p) \
+ { UPDATE_0_CHECK; i = (i + i); A0; } else \
+ { UPDATE_1_CHECK; i = (i + i) + 1; A1; }
+#define GET_BIT_CHECK(p, i) GET_BIT2_CHECK(p, i, ; , ;)
+#define TREE_DECODE_CHECK(probs, limit, i) \
+ { i = 1; do { GET_BIT_CHECK(probs + i, i) } while (i < limit); i -= limit; }
+
+
+#define kNumPosBitsMax 4
+#define kNumPosStatesMax (1 << kNumPosBitsMax)
+
+#define kLenNumLowBits 3
+#define kLenNumLowSymbols (1 << kLenNumLowBits)
+#define kLenNumMidBits 3
+#define kLenNumMidSymbols (1 << kLenNumMidBits)
+#define kLenNumHighBits 8
+#define kLenNumHighSymbols (1 << kLenNumHighBits)
+
+#define LenChoice 0
+#define LenChoice2 (LenChoice + 1)
+#define LenLow (LenChoice2 + 1)
+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
+
+
+#define kNumStates 12
+#define kNumLitStates 7
+
+#define kStartPosModelIndex 4
+#define kEndPosModelIndex 14
+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
+
+#define kNumPosSlotBits 6
+#define kNumLenToPosStates 4
+
+#define kNumAlignBits 4
+#define kAlignTableSize (1 << kNumAlignBits)
+
+#define kMatchMinLen 2
+#define kMatchSpecLenStart (kMatchMinLen + kLenNumLowSymbols + kLenNumMidSymbols + kLenNumHighSymbols)
+
+#define IsMatch 0
+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
+#define IsRepG0 (IsRep + kNumStates)
+#define IsRepG1 (IsRepG0 + kNumStates)
+#define IsRepG2 (IsRepG1 + kNumStates)
+#define IsRep0Long (IsRepG2 + kNumStates)
+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
+#define LenCoder (Align + kAlignTableSize)
+#define RepLenCoder (LenCoder + kNumLenProbs)
+#define Literal (RepLenCoder + kNumLenProbs)
+
+#define LZMA_BASE_SIZE 1846
+#define LZMA_LIT_SIZE 768
+
+#define LzmaProps_GetNumProbs(p) ((UInt32)LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((p)->lc + (p)->lp)))
+
+#if Literal != LZMA_BASE_SIZE
+StopCompilingDueBUG
+#endif
+
+#define LZMA_DIC_MIN (1 << 12)
+
+/* First LZMA-symbol is always decoded.
+And it decodes new LZMA-symbols while (buf < bufLimit), but "buf" is without last normalization
+Out:
+ Result:
+ SZ_OK - OK
+ SZ_ERROR_DATA - Error
+ p->remainLen:
+ < kMatchSpecLenStart : normal remain
+ = kMatchSpecLenStart : finished
+ = kMatchSpecLenStart + 1 : Flush marker
+ = kMatchSpecLenStart + 2 : State Init Marker
+*/
+
+static int MY_FAST_CALL LzmaDec_DecodeReal(CLzmaDec *p, SizeT limit, const Byte *bufLimit)
+{
+ CLzmaProb *probs = p->probs;
+
+ unsigned state = p->state;
+ UInt32 rep0 = p->reps[0], rep1 = p->reps[1], rep2 = p->reps[2], rep3 = p->reps[3];
+ unsigned pbMask = ((unsigned)1 << (p->prop.pb)) - 1;
+ unsigned lpMask = ((unsigned)1 << (p->prop.lp)) - 1;
+ unsigned lc = p->prop.lc;
+
+ Byte *dic = p->dic;
+ SizeT dicBufSize = p->dicBufSize;
+ SizeT dicPos = p->dicPos;
+
+ UInt32 processedPos = p->processedPos;
+ UInt32 checkDicSize = p->checkDicSize;
+ unsigned len = 0;
+
+ const Byte *buf = p->buf;
+ UInt32 range = p->range;
+ UInt32 code = p->code;
+
+ do
+ {
+ CLzmaProb *prob;
+ UInt32 bound;
+ unsigned ttt;
+ unsigned posState = processedPos & pbMask;
+
+ prob = probs + IsMatch + (state << kNumPosBitsMax) + posState;
+ IF_BIT_0(prob)
+ {
+ unsigned symbol;
+ UPDATE_0(prob);
+ prob = probs + Literal;
+ if (checkDicSize != 0 || processedPos != 0)
+ prob += (LZMA_LIT_SIZE * (((processedPos & lpMask) << lc) +
+ (dic[(dicPos == 0 ? dicBufSize : dicPos) - 1] >> (8 - lc))));
+
+ if (state < kNumLitStates)
+ {
+ state -= (state < 4) ? state : 3;
+ symbol = 1;
+ do { GET_BIT(prob + symbol, symbol) } while (symbol < 0x100);
+ }
+ else
+ {
+ unsigned matchByte = p->dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
+ unsigned offs = 0x100;
+ state -= (state < 10) ? 3 : 6;
+ symbol = 1;
+ do
+ {
+ unsigned bit;
+ CLzmaProb *probLit;
+ matchByte <<= 1;
+ bit = (matchByte & offs);
+ probLit = prob + offs + bit + symbol;
+ GET_BIT2(probLit, symbol, offs &= ~bit, offs &= bit)
+ }
+ while (symbol < 0x100);
+ }
+ dic[dicPos++] = (Byte)symbol;
+ processedPos++;
+ continue;
+ }
+ else
+ {
+ UPDATE_1(prob);
+ prob = probs + IsRep + state;
+ IF_BIT_0(prob)
+ {
+ UPDATE_0(prob);
+ state += kNumStates;
+ prob = probs + LenCoder;
+ }
+ else
+ {
+ UPDATE_1(prob);
+ if (checkDicSize == 0 && processedPos == 0)
+ return SZ_ERROR_DATA;
+ prob = probs + IsRepG0 + state;
+ IF_BIT_0(prob)
+ {
+ UPDATE_0(prob);
+ prob = probs + IsRep0Long + (state << kNumPosBitsMax) + posState;
+ IF_BIT_0(prob)
+ {
+ UPDATE_0(prob);
+ dic[dicPos] = dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
+ dicPos++;
+ processedPos++;
+ state = state < kNumLitStates ? 9 : 11;
+ continue;
+ }
+ UPDATE_1(prob);
+ }
+ else
+ {
+ UInt32 distance;
+ UPDATE_1(prob);
+ prob = probs + IsRepG1 + state;
+ IF_BIT_0(prob)
+ {
+ UPDATE_0(prob);
+ distance = rep1;
+ }
+ else
+ {
+ UPDATE_1(prob);
+ prob = probs + IsRepG2 + state;
+ IF_BIT_0(prob)
+ {
+ UPDATE_0(prob);
+ distance = rep2;
+ }
+ else
+ {
+ UPDATE_1(prob);
+ distance = rep3;
+ rep3 = rep2;
+ }
+ rep2 = rep1;
+ }
+ rep1 = rep0;
+ rep0 = distance;
+ }
+ state = state < kNumLitStates ? 8 : 11;
+ prob = probs + RepLenCoder;
+ }
+ {
+ unsigned limit, offset;
+ CLzmaProb *probLen = prob + LenChoice;
+ IF_BIT_0(probLen)
+ {
+ UPDATE_0(probLen);
+ probLen = prob + LenLow + (posState << kLenNumLowBits);
+ offset = 0;
+ limit = (1 << kLenNumLowBits);
+ }
+ else
+ {
+ UPDATE_1(probLen);
+ probLen = prob + LenChoice2;
+ IF_BIT_0(probLen)
+ {
+ UPDATE_0(probLen);
+ probLen = prob + LenMid + (posState << kLenNumMidBits);
+ offset = kLenNumLowSymbols;
+ limit = (1 << kLenNumMidBits);
+ }
+ else
+ {
+ UPDATE_1(probLen);
+ probLen = prob + LenHigh;
+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
+ limit = (1 << kLenNumHighBits);
+ }
+ }
+ TREE_DECODE(probLen, limit, len);
+ len += offset;
+ }
+
+ if (state >= kNumStates)
+ {
+ UInt32 distance;
+ prob = probs + PosSlot +
+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) << kNumPosSlotBits);
+ TREE_6_DECODE(prob, distance);
+ if (distance >= kStartPosModelIndex)
+ {
+ unsigned posSlot = (unsigned)distance;
+ int numDirectBits = (int)(((distance >> 1) - 1));
+ distance = (2 | (distance & 1));
+ if (posSlot < kEndPosModelIndex)
+ {
+ distance <<= numDirectBits;
+ prob = probs + SpecPos + distance - posSlot - 1;
+ {
+ UInt32 mask = 1;
+ unsigned i = 1;
+ do
+ {
+ GET_BIT2(prob + i, i, ; , distance |= mask);
+ mask <<= 1;
+ }
+ while (--numDirectBits != 0);
+ }
+ }
+ else
+ {
+ numDirectBits -= kNumAlignBits;
+ do
+ {
+ NORMALIZE
+ range >>= 1;
+
+ {
+ UInt32 t;
+ code -= range;
+ t = (0 - ((UInt32)code >> 31)); /* (UInt32)((Int32)code >> 31) */
+ distance = (distance << 1) + (t + 1);
+ code += range & t;
+ }
+ /*
+ distance <<= 1;
+ if (code >= range)
+ {
+ code -= range;
+ distance |= 1;
+ }
+ */
+ }
+ while (--numDirectBits != 0);
+ prob = probs + Align;
+ distance <<= kNumAlignBits;
+ {
+ unsigned i = 1;
+ GET_BIT2(prob + i, i, ; , distance |= 1);
+ GET_BIT2(prob + i, i, ; , distance |= 2);
+ GET_BIT2(prob + i, i, ; , distance |= 4);
+ GET_BIT2(prob + i, i, ; , distance |= 8);
+ }
+ if (distance == (UInt32)0xFFFFFFFF)
+ {
+ len += kMatchSpecLenStart;
+ state -= kNumStates;
+ break;
+ }
+ }
+ }
+ rep3 = rep2;
+ rep2 = rep1;
+ rep1 = rep0;
+ rep0 = distance + 1;
+ if (checkDicSize == 0)
+ {
+ if (distance >= processedPos)
+ return SZ_ERROR_DATA;
+ }
+ else if (distance >= checkDicSize)
+ return SZ_ERROR_DATA;
+ state = (state < kNumStates + kNumLitStates) ? kNumLitStates : kNumLitStates + 3;
+ }
+
+ len += kMatchMinLen;
+
+ if (limit == dicPos)
+ return SZ_ERROR_DATA;
+ {
+ SizeT rem = limit - dicPos;
+ unsigned curLen = ((rem < len) ? (unsigned)rem : len);
+ SizeT pos = (dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0);
+
+ processedPos += curLen;
+
+ len -= curLen;
+ if (pos + curLen <= dicBufSize)
+ {
+ Byte *dest = dic + dicPos;
+ ptrdiff_t src = (ptrdiff_t)pos - (ptrdiff_t)dicPos;
+ const Byte *lim = dest + curLen;
+ dicPos += curLen;
+ do
+ *(dest) = (Byte)*(dest + src);
+ while (++dest != lim);
+ }
+ else
+ {
+ do
+ {
+ dic[dicPos++] = dic[pos];
+ if (++pos == dicBufSize)
+ pos = 0;
+ }
+ while (--curLen != 0);
+ }
+ }
+ }
+ }
+ while (dicPos < limit && buf < bufLimit);
+ NORMALIZE;
+ p->buf = buf;
+ p->range = range;
+ p->code = code;
+ p->remainLen = len;
+ p->dicPos = dicPos;
+ p->processedPos = processedPos;
+ p->reps[0] = rep0;
+ p->reps[1] = rep1;
+ p->reps[2] = rep2;
+ p->reps[3] = rep3;
+ p->state = state;
+
+ return SZ_OK;
+}
+
+static void MY_FAST_CALL LzmaDec_WriteRem(CLzmaDec *p, SizeT limit)
+{
+ if (p->remainLen != 0 && p->remainLen < kMatchSpecLenStart)
+ {
+ Byte *dic = p->dic;
+ SizeT dicPos = p->dicPos;
+ SizeT dicBufSize = p->dicBufSize;
+ unsigned len = p->remainLen;
+ UInt32 rep0 = p->reps[0];
+ if (limit - dicPos < len)
+ len = (unsigned)(limit - dicPos);
+
+ if (p->checkDicSize == 0 && p->prop.dicSize - p->processedPos <= len)
+ p->checkDicSize = p->prop.dicSize;
+
+ p->processedPos += len;
+ p->remainLen -= len;
+ while (len-- != 0)
+ {
+ dic[dicPos] = dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
+ dicPos++;
+ }
+ p->dicPos = dicPos;
+ }
+}
+
+static int MY_FAST_CALL LzmaDec_DecodeReal2(CLzmaDec *p, SizeT limit, const Byte *bufLimit)
+{
+ do
+ {
+ SizeT limit2 = limit;
+ if (p->checkDicSize == 0)
+ {
+ UInt32 rem = p->prop.dicSize - p->processedPos;
+ if (limit - p->dicPos > rem)
+ limit2 = p->dicPos + rem;
+ }
+ RINOK(LzmaDec_DecodeReal(p, limit2, bufLimit));
+ if (p->processedPos >= p->prop.dicSize)
+ p->checkDicSize = p->prop.dicSize;
+ LzmaDec_WriteRem(p, limit);
+ }
+ while (p->dicPos < limit && p->buf < bufLimit && p->remainLen < kMatchSpecLenStart);
+
+ if (p->remainLen > kMatchSpecLenStart)
+ {
+ p->remainLen = kMatchSpecLenStart;
+ }
+ return 0;
+}
+
+typedef enum
+{
+ DUMMY_ERROR, /* unexpected end of input stream */
+ DUMMY_LIT,
+ DUMMY_MATCH,
+ DUMMY_REP
+} ELzmaDummy;
+
+static ELzmaDummy LzmaDec_TryDummy(const CLzmaDec *p, const Byte *buf, SizeT inSize)
+{
+ UInt32 range = p->range;
+ UInt32 code = p->code;
+ const Byte *bufLimit = buf + inSize;
+ CLzmaProb *probs = p->probs;
+ unsigned state = p->state;
+ ELzmaDummy res;
+
+ {
+ CLzmaProb *prob;
+ UInt32 bound;
+ unsigned ttt;
+ unsigned posState = (p->processedPos) & ((1 << p->prop.pb) - 1);
+
+ prob = probs + IsMatch + (state << kNumPosBitsMax) + posState;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK
+
+ /* if (bufLimit - buf >= 7) return DUMMY_LIT; */
+
+ prob = probs + Literal;
+ if (p->checkDicSize != 0 || p->processedPos != 0)
+ prob += (LZMA_LIT_SIZE *
+ ((((p->processedPos) & ((1 << (p->prop.lp)) - 1)) << p->prop.lc) +
+ (p->dic[(p->dicPos == 0 ? p->dicBufSize : p->dicPos) - 1] >> (8 - p->prop.lc))));
+
+ if (state < kNumLitStates)
+ {
+ unsigned symbol = 1;
+ do { GET_BIT_CHECK(prob + symbol, symbol) } while (symbol < 0x100);
+ }
+ else
+ {
+ unsigned matchByte = p->dic[p->dicPos - p->reps[0] +
+ ((p->dicPos < p->reps[0]) ? p->dicBufSize : 0)];
+ unsigned offs = 0x100;
+ unsigned symbol = 1;
+ do
+ {
+ unsigned bit;
+ CLzmaProb *probLit;
+ matchByte <<= 1;
+ bit = (matchByte & offs);
+ probLit = prob + offs + bit + symbol;
+ GET_BIT2_CHECK(probLit, symbol, offs &= ~bit, offs &= bit)
+ }
+ while (symbol < 0x100);
+ }
+ res = DUMMY_LIT;
+ }
+ else
+ {
+ unsigned len;
+ UPDATE_1_CHECK;
+
+ prob = probs + IsRep + state;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK;
+ state = 0;
+ prob = probs + LenCoder;
+ res = DUMMY_MATCH;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ res = DUMMY_REP;
+ prob = probs + IsRepG0 + state;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK;
+ prob = probs + IsRep0Long + (state << kNumPosBitsMax) + posState;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK;
+ NORMALIZE_CHECK;
+ return DUMMY_REP;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ }
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ prob = probs + IsRepG1 + state;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ prob = probs + IsRepG2 + state;
+ IF_BIT_0_CHECK(prob)
+ {
+ UPDATE_0_CHECK;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ }
+ }
+ }
+ state = kNumStates;
+ prob = probs + RepLenCoder;
+ }
+ {
+ unsigned limit, offset;
+ CLzmaProb *probLen = prob + LenChoice;
+ IF_BIT_0_CHECK(probLen)
+ {
+ UPDATE_0_CHECK;
+ probLen = prob + LenLow + (posState << kLenNumLowBits);
+ offset = 0;
+ limit = 1 << kLenNumLowBits;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ probLen = prob + LenChoice2;
+ IF_BIT_0_CHECK(probLen)
+ {
+ UPDATE_0_CHECK;
+ probLen = prob + LenMid + (posState << kLenNumMidBits);
+ offset = kLenNumLowSymbols;
+ limit = 1 << kLenNumMidBits;
+ }
+ else
+ {
+ UPDATE_1_CHECK;
+ probLen = prob + LenHigh;
+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
+ limit = 1 << kLenNumHighBits;
+ }
+ }
+ TREE_DECODE_CHECK(probLen, limit, len);
+ len += offset;
+ }
+
+ if (state < 4)
+ {
+ unsigned posSlot;
+ prob = probs + PosSlot +
+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
+ kNumPosSlotBits);
+ TREE_DECODE_CHECK(prob, 1 << kNumPosSlotBits, posSlot);
+ if (posSlot >= kStartPosModelIndex)
+ {
+ int numDirectBits = ((posSlot >> 1) - 1);
+
+ /* if (bufLimit - buf >= 8) return DUMMY_MATCH; */
+
+ if (posSlot < kEndPosModelIndex)
+ {
+ prob = probs + SpecPos + ((2 | (posSlot & 1)) << numDirectBits) - posSlot - 1;
+ }
+ else
+ {
+ numDirectBits -= kNumAlignBits;
+ do
+ {
+ NORMALIZE_CHECK
+ range >>= 1;
+ code -= range & (((code - range) >> 31) - 1);
+ /* if (code >= range) code -= range; */
+ }
+ while (--numDirectBits != 0);
+ prob = probs + Align;
+ numDirectBits = kNumAlignBits;
+ }
+ {
+ unsigned i = 1;
+ do
+ {
+ GET_BIT_CHECK(prob + i, i);
+ }
+ while (--numDirectBits != 0);
+ }
+ }
+ }
+ }
+ }
+ NORMALIZE_CHECK;
+ return res;
+}
+
+
+static void LzmaDec_InitRc(CLzmaDec *p, const Byte *data)
+{
+ p->code = ((UInt32)data[1] << 24) | ((UInt32)data[2] << 16) | ((UInt32)data[3] << 8) | ((UInt32)data[4]);
+ p->range = 0xFFFFFFFF;
+ p->needFlush = 0;
+}
+
+static void LzmaDec_InitDicAndState(CLzmaDec *p, Bool initDic, Bool initState)
+{
+ p->needFlush = 1;
+ p->remainLen = 0;
+ p->tempBufSize = 0;
+
+ if (initDic)
+ {
+ p->processedPos = 0;
+ p->checkDicSize = 0;
+ p->needInitState = 1;
+ }
+ if (initState)
+ p->needInitState = 1;
+}
+
+static void LzmaDec_Init(CLzmaDec *p)
+{
+ p->dicPos = 0;
+ LzmaDec_InitDicAndState(p, True, True);
+}
+
+static void LzmaDec_InitStateReal(CLzmaDec *p)
+{
+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (p->prop.lc + p->prop.lp));
+ UInt32 i;
+ CLzmaProb *probs = p->probs;
+ for (i = 0; i < numProbs; i++)
+ probs[i] = kBitModelTotal >> 1;
+ p->reps[0] = p->reps[1] = p->reps[2] = p->reps[3] = 1;
+ p->state = 0;
+ p->needInitState = 0;
+}
+
+static SRes LzmaDec_DecodeToDic(CLzmaDec *p, SizeT dicLimit, const Byte *src, SizeT *srcLen,
+ ELzmaFinishMode finishMode, ELzmaStatus *status)
+{
+ SizeT inSize = *srcLen;
+ (*srcLen) = 0;
+ LzmaDec_WriteRem(p, dicLimit);
+
+ *status = LZMA_STATUS_NOT_SPECIFIED;
+
+ while (p->remainLen != kMatchSpecLenStart)
+ {
+ int checkEndMarkNow;
+
+ if (p->needFlush != 0)
+ {
+ for (; inSize > 0 && p->tempBufSize < RC_INIT_SIZE; (*srcLen)++, inSize--)
+ p->tempBuf[p->tempBufSize++] = *src++;
+ if (p->tempBufSize < RC_INIT_SIZE)
+ {
+ *status = LZMA_STATUS_NEEDS_MORE_INPUT;
+ return SZ_OK;
+ }
+ if (p->tempBuf[0] != 0)
+ return SZ_ERROR_DATA;
+
+ LzmaDec_InitRc(p, p->tempBuf);
+ p->tempBufSize = 0;
+ }
+
+ checkEndMarkNow = 0;
+ if (p->dicPos >= dicLimit)
+ {
+ if (p->remainLen == 0 && p->code == 0)
+ {
+ *status = LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK;
+ return SZ_OK;
+ }
+ if (finishMode == LZMA_FINISH_ANY)
+ {
+ *status = LZMA_STATUS_NOT_FINISHED;
+ return SZ_OK;
+ }
+ if (p->remainLen != 0)
+ {
+ *status = LZMA_STATUS_NOT_FINISHED;
+ return SZ_ERROR_DATA;
+ }
+ checkEndMarkNow = 1;
+ }
+
+ if (p->needInitState)
+ LzmaDec_InitStateReal(p);
+
+ if (p->tempBufSize == 0)
+ {
+ SizeT processed;
+ const Byte *bufLimit;
+ if (inSize < LZMA_REQUIRED_INPUT_MAX || checkEndMarkNow)
+ {
+ int dummyRes = LzmaDec_TryDummy(p, src, inSize);
+ if (dummyRes == DUMMY_ERROR)
+ {
+ memcpy(p->tempBuf, src, inSize);
+ p->tempBufSize = (unsigned)inSize;
+ (*srcLen) += inSize;
+ *status = LZMA_STATUS_NEEDS_MORE_INPUT;
+ return SZ_OK;
+ }
+ if (checkEndMarkNow && dummyRes != DUMMY_MATCH)
+ {
+ *status = LZMA_STATUS_NOT_FINISHED;
+ return SZ_ERROR_DATA;
+ }
+ bufLimit = src;
+ }
+ else
+ bufLimit = src + inSize - LZMA_REQUIRED_INPUT_MAX;
+ p->buf = src;
+ if (LzmaDec_DecodeReal2(p, dicLimit, bufLimit) != 0)
+ return SZ_ERROR_DATA;
+ processed = (SizeT)(p->buf - src);
+ (*srcLen) += processed;
+ src += processed;
+ inSize -= processed;
+ }
+ else
+ {
+ unsigned rem = p->tempBufSize, lookAhead = 0;
+ while (rem < LZMA_REQUIRED_INPUT_MAX && lookAhead < inSize)
+ p->tempBuf[rem++] = src[lookAhead++];
+ p->tempBufSize = rem;
+ if (rem < LZMA_REQUIRED_INPUT_MAX || checkEndMarkNow)
+ {
+ int dummyRes = LzmaDec_TryDummy(p, p->tempBuf, rem);
+ if (dummyRes == DUMMY_ERROR)
+ {
+ (*srcLen) += lookAhead;
+ *status = LZMA_STATUS_NEEDS_MORE_INPUT;
+ return SZ_OK;
+ }
+ if (checkEndMarkNow && dummyRes != DUMMY_MATCH)
+ {
+ *status = LZMA_STATUS_NOT_FINISHED;
+ return SZ_ERROR_DATA;
+ }
+ }
+ p->buf = p->tempBuf;
+ if (LzmaDec_DecodeReal2(p, dicLimit, p->buf) != 0)
+ return SZ_ERROR_DATA;
+ lookAhead -= (rem - (unsigned)(p->buf - p->tempBuf));
+ (*srcLen) += lookAhead;
+ src += lookAhead;
+ inSize -= lookAhead;
+ p->tempBufSize = 0;
+ }
+ }
+ if (p->code == 0)
+ *status = LZMA_STATUS_FINISHED_WITH_MARK;
+ return (p->code == 0) ? SZ_OK : SZ_ERROR_DATA;
+}
+
+static void LzmaDec_FreeProbs(CLzmaDec *p, ISzAlloc *alloc)
+{
+ alloc->Free(alloc, p->probs);
+ p->probs = 0;
+}
+
+static SRes LzmaProps_Decode(CLzmaProps *p, const Byte *data, unsigned size)
+{
+ UInt32 dicSize;
+ Byte d;
+
+ if (size < LZMA_PROPS_SIZE)
+ return SZ_ERROR_UNSUPPORTED;
+ else
+ dicSize = data[1] | ((UInt32)data[2] << 8) | ((UInt32)data[3] << 16) | ((UInt32)data[4] << 24);
+
+ if (dicSize < LZMA_DIC_MIN)
+ dicSize = LZMA_DIC_MIN;
+ p->dicSize = dicSize;
+
+ d = data[0];
+ if (d >= (9 * 5 * 5))
+ return SZ_ERROR_UNSUPPORTED;
+
+ p->lc = d % 9;
+ d /= 9;
+ p->pb = d / 5;
+ p->lp = d % 5;
+
+ return SZ_OK;
+}
+
+static SRes LzmaDec_AllocateProbs2(CLzmaDec *p, const CLzmaProps *propNew, ISzAlloc *alloc)
+{
+ UInt32 numProbs = LzmaProps_GetNumProbs(propNew);
+ if (p->probs == 0 || numProbs != p->numProbs)
+ {
+ LzmaDec_FreeProbs(p, alloc);
+ p->probs = (CLzmaProb *)alloc->Alloc(alloc, numProbs * sizeof(CLzmaProb));
+ p->numProbs = numProbs;
+ if (p->probs == 0)
+ return SZ_ERROR_MEM;
+ }
+ return SZ_OK;
+}
+
+static SRes LzmaDec_AllocateProbs(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
+{
+ CLzmaProps propNew;
+ RINOK(LzmaProps_Decode(&propNew, props, propsSize));
+ RINOK(LzmaDec_AllocateProbs2(p, &propNew, alloc));
+ p->prop = propNew;
+ return SZ_OK;
+}
+
+SRes LzmaDecode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
+ const Byte *propData, unsigned propSize, ELzmaFinishMode finishMode,
+ ELzmaStatus *status, ISzAlloc *alloc)
+{
+ CLzmaDec p;
+ SRes res;
+ SizeT inSize = *srcLen;
+ SizeT outSize = *destLen;
+ *srcLen = *destLen = 0;
+ if (inSize < RC_INIT_SIZE)
+ return SZ_ERROR_INPUT_EOF;
+
+ LzmaDec_Construct(&p);
+ res = LzmaDec_AllocateProbs(&p, propData, propSize, alloc);
+ if (res != 0)
+ return res;
+ p.dic = dest;
+ p.dicBufSize = outSize;
+
+ LzmaDec_Init(&p);
+
+ *srcLen = inSize;
+ res = LzmaDec_DecodeToDic(&p, outSize, src, srcLen, finishMode, status);
+
+ if (res == SZ_OK && *status == LZMA_STATUS_NEEDS_MORE_INPUT)
+ res = SZ_ERROR_INPUT_EOF;
+
+ (*destLen) = p.dicPos;
+ LzmaDec_FreeProbs(&p, alloc);
+ return res;
+}
--- /dev/null
+++ b/lib/lzma/LzmaEnc.c
@@ -0,0 +1,2123 @@
+/* LzmaEnc.c -- LZMA Encoder
+2009-11-24 : Igor Pavlov : Public domain */
+
+#include <string.h>
+
+/* #define SHOW_STAT */
+/* #define SHOW_STAT2 */
+
+#if defined(SHOW_STAT) || defined(SHOW_STAT2)
+#include <stdio.h>
+#endif
+
+#include "LzmaEnc.h"
+
+/* disable MT */
+#define _7ZIP_ST
+
+#include "LzFind.h"
+#ifndef _7ZIP_ST
+#include "LzFindMt.h"
+#endif
+
+#ifdef SHOW_STAT
+static int ttt = 0;
+#endif
+
+#define kBlockSizeMax ((1 << LZMA_NUM_BLOCK_SIZE_BITS) - 1)
+
+#define kBlockSize (9 << 10)
+#define kUnpackBlockSize (1 << 18)
+#define kMatchArraySize (1 << 21)
+#define kMatchRecordMaxSize ((LZMA_MATCH_LEN_MAX * 2 + 3) * LZMA_MATCH_LEN_MAX)
+
+#define kNumMaxDirectBits (31)
+
+#define kNumTopBits 24
+#define kTopValue ((UInt32)1 << kNumTopBits)
+
+#define kNumBitModelTotalBits 11
+#define kBitModelTotal (1 << kNumBitModelTotalBits)
+#define kNumMoveBits 5
+#define kProbInitValue (kBitModelTotal >> 1)
+
+#define kNumMoveReducingBits 4
+#define kNumBitPriceShiftBits 4
+#define kBitPrice (1 << kNumBitPriceShiftBits)
+
+void LzmaEncProps_Init(CLzmaEncProps *p)
+{
+ p->level = 5;
+ p->dictSize = p->mc = 0;
+ p->lc = p->lp = p->pb = p->algo = p->fb = p->btMode = p->numHashBytes = p->numThreads = -1;
+ p->writeEndMark = 0;
+}
+
+static void LzmaEncProps_Normalize(CLzmaEncProps *p)
+{
+ int level = p->level;
+ if (level < 0) level = 5;
+ p->level = level;
+ if (p->dictSize == 0) p->dictSize = (level <= 5 ? (1 << (level * 2 + 14)) : (level == 6 ? (1 << 25) : (1 << 26)));
+ if (p->lc < 0) p->lc = 3;
+ if (p->lp < 0) p->lp = 0;
+ if (p->pb < 0) p->pb = 2;
+ if (p->algo < 0) p->algo = (level < 5 ? 0 : 1);
+ if (p->fb < 0) p->fb = (level < 7 ? 32 : 64);
+ if (p->btMode < 0) p->btMode = (p->algo == 0 ? 0 : 1);
+ if (p->numHashBytes < 0) p->numHashBytes = 4;
+ if (p->mc == 0) p->mc = (16 + (p->fb >> 1)) >> (p->btMode ? 0 : 1);
+ if (p->numThreads < 0)
+ p->numThreads =
+ #ifndef _7ZIP_ST
+ ((p->btMode && p->algo) ? 2 : 1);
+ #else
+ 1;
+ #endif
+}
+
+static UInt32 __maybe_unused LzmaEncProps_GetDictSize(const CLzmaEncProps *props2)
+{
+ CLzmaEncProps props = *props2;
+ LzmaEncProps_Normalize(&props);
+ return props.dictSize;
+}
+
+/* #define LZMA_LOG_BSR */
+/* Define it for Intel's CPU */
+
+
+#ifdef LZMA_LOG_BSR
+
+#define kDicLogSizeMaxCompress 30
+
+#define BSR2_RET(pos, res) { unsigned long i; _BitScanReverse(&i, (pos)); res = (i + i) + ((pos >> (i - 1)) & 1); }
+
+static UInt32 GetPosSlot1(UInt32 pos)
+{
+ UInt32 res;
+ BSR2_RET(pos, res);
+ return res;
+}
+#define GetPosSlot2(pos, res) { BSR2_RET(pos, res); }
+#define GetPosSlot(pos, res) { if (pos < 2) res = pos; else BSR2_RET(pos, res); }
+
+#else
+
+#define kNumLogBits (9 + (int)sizeof(size_t) / 2)
+#define kDicLogSizeMaxCompress ((kNumLogBits - 1) * 2 + 7)
+
+static void LzmaEnc_FastPosInit(Byte *g_FastPos)
+{
+ int c = 2, slotFast;
+ g_FastPos[0] = 0;
+ g_FastPos[1] = 1;
+
+ for (slotFast = 2; slotFast < kNumLogBits * 2; slotFast++)
+ {
+ UInt32 k = (1 << ((slotFast >> 1) - 1));
+ UInt32 j;
+ for (j = 0; j < k; j++, c++)
+ g_FastPos[c] = (Byte)slotFast;
+ }
+}
+
+#define BSR2_RET(pos, res) { UInt32 i = 6 + ((kNumLogBits - 1) & \
+ (0 - (((((UInt32)1 << (kNumLogBits + 6)) - 1) - pos) >> 31))); \
+ res = p->g_FastPos[pos >> i] + (i * 2); }
+/*
+#define BSR2_RET(pos, res) { res = (pos < (1 << (kNumLogBits + 6))) ? \
+ p->g_FastPos[pos >> 6] + 12 : \
+ p->g_FastPos[pos >> (6 + kNumLogBits - 1)] + (6 + (kNumLogBits - 1)) * 2; }
+*/
+
+#define GetPosSlot1(pos) p->g_FastPos[pos]
+#define GetPosSlot2(pos, res) { BSR2_RET(pos, res); }
+#define GetPosSlot(pos, res) { if (pos < kNumFullDistances) res = p->g_FastPos[pos]; else BSR2_RET(pos, res); }
+
+#endif
+
+
+#define LZMA_NUM_REPS 4
+
+typedef unsigned CState;
+
+typedef struct
+{
+ UInt32 price;
+
+ CState state;
+ int prev1IsChar;
+ int prev2;
+
+ UInt32 posPrev2;
+ UInt32 backPrev2;
+
+ UInt32 posPrev;
+ UInt32 backPrev;
+ UInt32 backs[LZMA_NUM_REPS];
+} COptimal;
+
+#define kNumOpts (1 << 12)
+
+#define kNumLenToPosStates 4
+#define kNumPosSlotBits 6
+#define kDicLogSizeMin 0
+#define kDicLogSizeMax 32
+#define kDistTableSizeMax (kDicLogSizeMax * 2)
+
+
+#define kNumAlignBits 4
+#define kAlignTableSize (1 << kNumAlignBits)
+#define kAlignMask (kAlignTableSize - 1)
+
+#define kStartPosModelIndex 4
+#define kEndPosModelIndex 14
+#define kNumPosModels (kEndPosModelIndex - kStartPosModelIndex)
+
+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
+
+#ifdef _LZMA_PROB32
+#define CLzmaProb UInt32
+#else
+#define CLzmaProb UInt16
+#endif
+
+#define LZMA_PB_MAX 4
+#define LZMA_LC_MAX 8
+#define LZMA_LP_MAX 4
+
+#define LZMA_NUM_PB_STATES_MAX (1 << LZMA_PB_MAX)
+
+
+#define kLenNumLowBits 3
+#define kLenNumLowSymbols (1 << kLenNumLowBits)
+#define kLenNumMidBits 3
+#define kLenNumMidSymbols (1 << kLenNumMidBits)
+#define kLenNumHighBits 8
+#define kLenNumHighSymbols (1 << kLenNumHighBits)
+
+#define kLenNumSymbolsTotal (kLenNumLowSymbols + kLenNumMidSymbols + kLenNumHighSymbols)
+
+#define LZMA_MATCH_LEN_MIN 2
+#define LZMA_MATCH_LEN_MAX (LZMA_MATCH_LEN_MIN + kLenNumSymbolsTotal - 1)
+
+#define kNumStates 12
+
+typedef struct
+{
+ CLzmaProb choice;
+ CLzmaProb choice2;
+ CLzmaProb low[LZMA_NUM_PB_STATES_MAX << kLenNumLowBits];
+ CLzmaProb mid[LZMA_NUM_PB_STATES_MAX << kLenNumMidBits];
+ CLzmaProb high[kLenNumHighSymbols];
+} CLenEnc;
+
+typedef struct
+{
+ CLenEnc p;
+ UInt32 prices[LZMA_NUM_PB_STATES_MAX][kLenNumSymbolsTotal];
+ UInt32 tableSize;
+ UInt32 counters[LZMA_NUM_PB_STATES_MAX];
+} CLenPriceEnc;
+
+typedef struct
+{
+ UInt32 range;
+ Byte cache;
+ UInt64 low;
+ UInt64 cacheSize;
+ Byte *buf;
+ Byte *bufLim;
+ Byte *bufBase;
+ ISeqOutStream *outStream;
+ UInt64 processed;
+ SRes res;
+} CRangeEnc;
+
+typedef struct
+{
+ CLzmaProb *litProbs;
+
+ CLzmaProb isMatch[kNumStates][LZMA_NUM_PB_STATES_MAX];
+ CLzmaProb isRep[kNumStates];
+ CLzmaProb isRepG0[kNumStates];
+ CLzmaProb isRepG1[kNumStates];
+ CLzmaProb isRepG2[kNumStates];
+ CLzmaProb isRep0Long[kNumStates][LZMA_NUM_PB_STATES_MAX];
+
+ CLzmaProb posSlotEncoder[kNumLenToPosStates][1 << kNumPosSlotBits];
+ CLzmaProb posEncoders[kNumFullDistances - kEndPosModelIndex];
+ CLzmaProb posAlignEncoder[1 << kNumAlignBits];
+
+ CLenPriceEnc lenEnc;
+ CLenPriceEnc repLenEnc;
+
+ UInt32 reps[LZMA_NUM_REPS];
+ UInt32 state;
+} CSaveState;
+
+typedef struct
+{
+ IMatchFinder matchFinder;
+ void *matchFinderObj;
+
+ #ifndef _7ZIP_ST
+ Bool mtMode;
+ CMatchFinderMt matchFinderMt;
+ #endif
+
+ CMatchFinder matchFinderBase;
+
+ #ifndef _7ZIP_ST
+ Byte pad[128];
+ #endif
+
+ UInt32 optimumEndIndex;
+ UInt32 optimumCurrentIndex;
+
+ UInt32 longestMatchLength;
+ UInt32 numPairs;
+ UInt32 numAvail;
+ COptimal opt[kNumOpts];
+
+ #ifndef LZMA_LOG_BSR
+ Byte g_FastPos[1 << kNumLogBits];
+ #endif
+
+ UInt32 ProbPrices[kBitModelTotal >> kNumMoveReducingBits];
+ UInt32 matches[LZMA_MATCH_LEN_MAX * 2 + 2 + 1];
+ UInt32 numFastBytes;
+ UInt32 additionalOffset;
+ UInt32 reps[LZMA_NUM_REPS];
+ UInt32 state;
+
+ UInt32 posSlotPrices[kNumLenToPosStates][kDistTableSizeMax];
+ UInt32 distancesPrices[kNumLenToPosStates][kNumFullDistances];
+ UInt32 alignPrices[kAlignTableSize];
+ UInt32 alignPriceCount;
+
+ UInt32 distTableSize;
+
+ unsigned lc, lp, pb;
+ unsigned lpMask, pbMask;
+
+ CLzmaProb *litProbs;
+
+ CLzmaProb isMatch[kNumStates][LZMA_NUM_PB_STATES_MAX];
+ CLzmaProb isRep[kNumStates];
+ CLzmaProb isRepG0[kNumStates];
+ CLzmaProb isRepG1[kNumStates];
+ CLzmaProb isRepG2[kNumStates];
+ CLzmaProb isRep0Long[kNumStates][LZMA_NUM_PB_STATES_MAX];
+
+ CLzmaProb posSlotEncoder[kNumLenToPosStates][1 << kNumPosSlotBits];
+ CLzmaProb posEncoders[kNumFullDistances - kEndPosModelIndex];
+ CLzmaProb posAlignEncoder[1 << kNumAlignBits];
+
+ CLenPriceEnc lenEnc;
+ CLenPriceEnc repLenEnc;
+
+ unsigned lclp;
+
+ Bool fastMode;
+
+ CRangeEnc rc;
+
+ Bool writeEndMark;
+ UInt64 nowPos64;
+ UInt32 matchPriceCount;
+ Bool finished;
+ Bool multiThread;
+
+ SRes result;
+ UInt32 dictSize;
+ UInt32 matchFinderCycles;
+
+ int needInit;
+
+ CSaveState saveState;
+} CLzmaEnc;
+
+SRes LzmaEnc_SetProps(CLzmaEncHandle pp, const CLzmaEncProps *props2)
+{
+ CLzmaEnc *p = (CLzmaEnc *)pp;
+ CLzmaEncProps props = *props2;
+ LzmaEncProps_Normalize(&props);
+
+ if (props.lc > LZMA_LC_MAX || props.lp > LZMA_LP_MAX || props.pb > LZMA_PB_MAX ||
+ props.dictSize > (1 << kDicLogSizeMaxCompress) || props.dictSize > (1 << 30))
+ return SZ_ERROR_PARAM;
+ p->dictSize = props.dictSize;
+ p->matchFinderCycles = props.mc;
+ {
+ unsigned fb = props.fb;
+ if (fb < 5)
+ fb = 5;
+ if (fb > LZMA_MATCH_LEN_MAX)
+ fb = LZMA_MATCH_LEN_MAX;
+ p->numFastBytes = fb;
+ }
+ p->lc = props.lc;
+ p->lp = props.lp;
+ p->pb = props.pb;
+ p->fastMode = (props.algo == 0);
+ p->matchFinderBase.btMode = props.btMode;
+ {
+ UInt32 numHashBytes = 4;
+ if (props.btMode)
+ {
+ if (props.numHashBytes < 2)
+ numHashBytes = 2;
+ else if (props.numHashBytes < 4)
+ numHashBytes = props.numHashBytes;
+ }
+ p->matchFinderBase.numHashBytes = numHashBytes;
+ }
+
+ p->matchFinderBase.cutValue = props.mc;
+
+ p->writeEndMark = props.writeEndMark;
+
+ #ifndef _7ZIP_ST
+ /*
+ if (newMultiThread != _multiThread)
+ {
+ ReleaseMatchFinder();
+ _multiThread = newMultiThread;
+ }
+ */
+ p->multiThread = (props.numThreads > 1);
+ #endif
+
+ return SZ_OK;
+}
+
+static const int kLiteralNextStates[kNumStates] = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
+static const int kMatchNextStates[kNumStates] = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
+static const int kRepNextStates[kNumStates] = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
+static const int kShortRepNextStates[kNumStates]= {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
+
+#define IsCharState(s) ((s) < 7)
+
+#define GetLenToPosState(len) (((len) < kNumLenToPosStates + 1) ? (len) - 2 : kNumLenToPosStates - 1)
+
+#define kInfinityPrice (1 << 30)
+
+static void RangeEnc_Construct(CRangeEnc *p)
+{
+ p->outStream = 0;
+ p->bufBase = 0;
+}
+
+#define RangeEnc_GetProcessed(p) ((p)->processed + ((p)->buf - (p)->bufBase) + (p)->cacheSize)
+
+#define RC_BUF_SIZE (1 << 16)
+static int RangeEnc_Alloc(CRangeEnc *p, ISzAlloc *alloc)
+{
+ if (p->bufBase == 0)
+ {
+ p->bufBase = (Byte *)alloc->Alloc(alloc, RC_BUF_SIZE);
+ if (p->bufBase == 0)
+ return 0;
+ p->bufLim = p->bufBase + RC_BUF_SIZE;
+ }
+ return 1;
+}
+
+static void RangeEnc_Free(CRangeEnc *p, ISzAlloc *alloc)
+{
+ alloc->Free(alloc, p->bufBase);
+ p->bufBase = 0;
+}
+
+static void RangeEnc_Init(CRangeEnc *p)
+{
+ /* Stream.Init(); */
+ p->low = 0;
+ p->range = 0xFFFFFFFF;
+ p->cacheSize = 1;
+ p->cache = 0;
+
+ p->buf = p->bufBase;
+
+ p->processed = 0;
+ p->res = SZ_OK;
+}
+
+static void RangeEnc_FlushStream(CRangeEnc *p)
+{
+ size_t num;
+ if (p->res != SZ_OK)
+ return;
+ num = p->buf - p->bufBase;
+ if (num != p->outStream->Write(p->outStream, p->bufBase, num))
+ p->res = SZ_ERROR_WRITE;
+ p->processed += num;
+ p->buf = p->bufBase;
+}
+
+static void MY_FAST_CALL RangeEnc_ShiftLow(CRangeEnc *p)
+{
+ if ((UInt32)p->low < (UInt32)0xFF000000 || (int)(p->low >> 32) != 0)
+ {
+ Byte temp = p->cache;
+ do
+ {
+ Byte *buf = p->buf;
+ *buf++ = (Byte)(temp + (Byte)(p->low >> 32));
+ p->buf = buf;
+ if (buf == p->bufLim)
+ RangeEnc_FlushStream(p);
+ temp = 0xFF;
+ }
+ while (--p->cacheSize != 0);
+ p->cache = (Byte)((UInt32)p->low >> 24);
+ }
+ p->cacheSize++;
+ p->low = (UInt32)p->low << 8;
+}
+
+static void RangeEnc_FlushData(CRangeEnc *p)
+{
+ int i;
+ for (i = 0; i < 5; i++)
+ RangeEnc_ShiftLow(p);
+}
+
+static void RangeEnc_EncodeDirectBits(CRangeEnc *p, UInt32 value, int numBits)
+{
+ do
+ {
+ p->range >>= 1;
+ p->low += p->range & (0 - ((value >> --numBits) & 1));
+ if (p->range < kTopValue)
+ {
+ p->range <<= 8;
+ RangeEnc_ShiftLow(p);
+ }
+ }
+ while (numBits != 0);
+}
+
+static void RangeEnc_EncodeBit(CRangeEnc *p, CLzmaProb *prob, UInt32 symbol)
+{
+ UInt32 ttt = *prob;
+ UInt32 newBound = (p->range >> kNumBitModelTotalBits) * ttt;
+ if (symbol == 0)
+ {
+ p->range = newBound;
+ ttt += (kBitModelTotal - ttt) >> kNumMoveBits;
+ }
+ else
+ {
+ p->low += newBound;
+ p->range -= newBound;
+ ttt -= ttt >> kNumMoveBits;
+ }
+ *prob = (CLzmaProb)ttt;
+ if (p->range < kTopValue)
+ {
+ p->range <<= 8;
+ RangeEnc_ShiftLow(p);
+ }
+}
+
+static void LitEnc_Encode(CRangeEnc *p, CLzmaProb *probs, UInt32 symbol)
+{
+ symbol |= 0x100;
+ do
+ {
+ RangeEnc_EncodeBit(p, probs + (symbol >> 8), (symbol >> 7) & 1);
+ symbol <<= 1;
+ }
+ while (symbol < 0x10000);
+}
+
+static void LitEnc_EncodeMatched(CRangeEnc *p, CLzmaProb *probs, UInt32 symbol, UInt32 matchByte)
+{
+ UInt32 offs = 0x100;
+ symbol |= 0x100;
+ do
+ {
+ matchByte <<= 1;
+ RangeEnc_EncodeBit(p, probs + (offs + (matchByte & offs) + (symbol >> 8)), (symbol >> 7) & 1);
+ symbol <<= 1;
+ offs &= ~(matchByte ^ symbol);
+ }
+ while (symbol < 0x10000);
+}
+
+static void LzmaEnc_InitPriceTables(UInt32 *ProbPrices)
+{
+ UInt32 i;
+ for (i = (1 << kNumMoveReducingBits) / 2; i < kBitModelTotal; i += (1 << kNumMoveReducingBits))
+ {
+ const int kCyclesBits = kNumBitPriceShiftBits;
+ UInt32 w = i;
+ UInt32 bitCount = 0;
+ int j;
+ for (j = 0; j < kCyclesBits; j++)
+ {
+ w = w * w;
+ bitCount <<= 1;
+ while (w >= ((UInt32)1 << 16))
+ {
+ w >>= 1;
+ bitCount++;
+ }
+ }
+ ProbPrices[i >> kNumMoveReducingBits] = ((kNumBitModelTotalBits << kCyclesBits) - 15 - bitCount);
+ }
+}
+
+
+#define GET_PRICE(prob, symbol) \
+ p->ProbPrices[((prob) ^ (((-(int)(symbol))) & (kBitModelTotal - 1))) >> kNumMoveReducingBits];
+
+#define GET_PRICEa(prob, symbol) \
+ ProbPrices[((prob) ^ ((-((int)(symbol))) & (kBitModelTotal - 1))) >> kNumMoveReducingBits];
+
+#define GET_PRICE_0(prob) p->ProbPrices[(prob) >> kNumMoveReducingBits]
+#define GET_PRICE_1(prob) p->ProbPrices[((prob) ^ (kBitModelTotal - 1)) >> kNumMoveReducingBits]
+
+#define GET_PRICE_0a(prob) ProbPrices[(prob) >> kNumMoveReducingBits]
+#define GET_PRICE_1a(prob) ProbPrices[((prob) ^ (kBitModelTotal - 1)) >> kNumMoveReducingBits]
+
+static UInt32 LitEnc_GetPrice(const CLzmaProb *probs, UInt32 symbol, UInt32 *ProbPrices)
+{
+ UInt32 price = 0;
+ symbol |= 0x100;
+ do
+ {
+ price += GET_PRICEa(probs[symbol >> 8], (symbol >> 7) & 1);
+ symbol <<= 1;
+ }
+ while (symbol < 0x10000);
+ return price;
+}
+
+static UInt32 LitEnc_GetPriceMatched(const CLzmaProb *probs, UInt32 symbol, UInt32 matchByte, UInt32 *ProbPrices)
+{
+ UInt32 price = 0;
+ UInt32 offs = 0x100;
+ symbol |= 0x100;
+ do
+ {
+ matchByte <<= 1;
+ price += GET_PRICEa(probs[offs + (matchByte & offs) + (symbol >> 8)], (symbol >> 7) & 1);
+ symbol <<= 1;
+ offs &= ~(matchByte ^ symbol);
+ }
+ while (symbol < 0x10000);
+ return price;
+}
+
+
+static void RcTree_Encode(CRangeEnc *rc, CLzmaProb *probs, int numBitLevels, UInt32 symbol)
+{
+ UInt32 m = 1;
+ int i;
+ for (i = numBitLevels; i != 0;)
+ {
+ UInt32 bit;
+ i--;
+ bit = (symbol >> i) & 1;
+ RangeEnc_EncodeBit(rc, probs + m, bit);
+ m = (m << 1) | bit;
+ }
+}
+
+static void RcTree_ReverseEncode(CRangeEnc *rc, CLzmaProb *probs, int numBitLevels, UInt32 symbol)
+{
+ UInt32 m = 1;
+ int i;
+ for (i = 0; i < numBitLevels; i++)
+ {
+ UInt32 bit = symbol & 1;
+ RangeEnc_EncodeBit(rc, probs + m, bit);
+ m = (m << 1) | bit;
+ symbol >>= 1;
+ }
+}
+
+static UInt32 RcTree_GetPrice(const CLzmaProb *probs, int numBitLevels, UInt32 symbol, UInt32 *ProbPrices)
+{
+ UInt32 price = 0;
+ symbol |= (1 << numBitLevels);
+ while (symbol != 1)
+ {
+ price += GET_PRICEa(probs[symbol >> 1], symbol & 1);
+ symbol >>= 1;
+ }
+ return price;
+}
+
+static UInt32 RcTree_ReverseGetPrice(const CLzmaProb *probs, int numBitLevels, UInt32 symbol, UInt32 *ProbPrices)
+{
+ UInt32 price = 0;
+ UInt32 m = 1;
+ int i;
+ for (i = numBitLevels; i != 0; i--)
+ {
+ UInt32 bit = symbol & 1;
+ symbol >>= 1;
+ price += GET_PRICEa(probs[m], bit);
+ m = (m << 1) | bit;
+ }
+ return price;
+}
+
+
+static void LenEnc_Init(CLenEnc *p)
+{
+ unsigned i;
+ p->choice = p->choice2 = kProbInitValue;
+ for (i = 0; i < (LZMA_NUM_PB_STATES_MAX << kLenNumLowBits); i++)
+ p->low[i] = kProbInitValue;
+ for (i = 0; i < (LZMA_NUM_PB_STATES_MAX << kLenNumMidBits); i++)
+ p->mid[i] = kProbInitValue;
+ for (i = 0; i < kLenNumHighSymbols; i++)
+ p->high[i] = kProbInitValue;
+}
+
+static void LenEnc_Encode(CLenEnc *p, CRangeEnc *rc, UInt32 symbol, UInt32 posState)
+{
+ if (symbol < kLenNumLowSymbols)
+ {
+ RangeEnc_EncodeBit(rc, &p->choice, 0);
+ RcTree_Encode(rc, p->low + (posState << kLenNumLowBits), kLenNumLowBits, symbol);
+ }
+ else
+ {
+ RangeEnc_EncodeBit(rc, &p->choice, 1);
+ if (symbol < kLenNumLowSymbols + kLenNumMidSymbols)
+ {
+ RangeEnc_EncodeBit(rc, &p->choice2, 0);
+ RcTree_Encode(rc, p->mid + (posState << kLenNumMidBits), kLenNumMidBits, symbol - kLenNumLowSymbols);
+ }
+ else
+ {
+ RangeEnc_EncodeBit(rc, &p->choice2, 1);
+ RcTree_Encode(rc, p->high, kLenNumHighBits, symbol - kLenNumLowSymbols - kLenNumMidSymbols);
+ }
+ }
+}
+
+static void LenEnc_SetPrices(CLenEnc *p, UInt32 posState, UInt32 numSymbols, UInt32 *prices, UInt32 *ProbPrices)
+{
+ UInt32 a0 = GET_PRICE_0a(p->choice);
+ UInt32 a1 = GET_PRICE_1a(p->choice);
+ UInt32 b0 = a1 + GET_PRICE_0a(p->choice2);
+ UInt32 b1 = a1 + GET_PRICE_1a(p->choice2);
+ UInt32 i = 0;
+ for (i = 0; i < kLenNumLowSymbols; i++)
+ {
+ if (i >= numSymbols)
+ return;
+ prices[i] = a0 + RcTree_GetPrice(p->low + (posState << kLenNumLowBits), kLenNumLowBits, i, ProbPrices);
+ }
+ for (; i < kLenNumLowSymbols + kLenNumMidSymbols; i++)
+ {
+ if (i >= numSymbols)
+ return;
+ prices[i] = b0 + RcTree_GetPrice(p->mid + (posState << kLenNumMidBits), kLenNumMidBits, i - kLenNumLowSymbols, ProbPrices);
+ }
+ for (; i < numSymbols; i++)
+ prices[i] = b1 + RcTree_GetPrice(p->high, kLenNumHighBits, i - kLenNumLowSymbols - kLenNumMidSymbols, ProbPrices);
+}
+
+static void MY_FAST_CALL LenPriceEnc_UpdateTable(CLenPriceEnc *p, UInt32 posState, UInt32 *ProbPrices)
+{
+ LenEnc_SetPrices(&p->p, posState, p->tableSize, p->prices[posState], ProbPrices);
+ p->counters[posState] = p->tableSize;
+}
+
+static void LenPriceEnc_UpdateTables(CLenPriceEnc *p, UInt32 numPosStates, UInt32 *ProbPrices)
+{
+ UInt32 posState;
+ for (posState = 0; posState < numPosStates; posState++)
+ LenPriceEnc_UpdateTable(p, posState, ProbPrices);
+}
+
+static void LenEnc_Encode2(CLenPriceEnc *p, CRangeEnc *rc, UInt32 symbol, UInt32 posState, Bool updatePrice, UInt32 *ProbPrices)
+{
+ LenEnc_Encode(&p->p, rc, symbol, posState);
+ if (updatePrice)
+ if (--p->counters[posState] == 0)
+ LenPriceEnc_UpdateTable(p, posState, ProbPrices);
+}
+
+
+
+
+static void MovePos(CLzmaEnc *p, UInt32 num)
+{
+ #ifdef SHOW_STAT
+ ttt += num;
+ printf("\n MovePos %d", num);
+ #endif
+ if (num != 0)
+ {
+ p->additionalOffset += num;
+ p->matchFinder.Skip(p->matchFinderObj, num);
+ }
+}
+
+static UInt32 ReadMatchDistances(CLzmaEnc *p, UInt32 *numDistancePairsRes)
+{
+ UInt32 lenRes = 0, numPairs;
+ p->numAvail = p->matchFinder.GetNumAvailableBytes(p->matchFinderObj);
+ numPairs = p->matchFinder.GetMatches(p->matchFinderObj, p->matches);
+ #ifdef SHOW_STAT
+ printf("\n i = %d numPairs = %d ", ttt, numPairs / 2);
+ ttt++;
+ {
+ UInt32 i;
+ for (i = 0; i < numPairs; i += 2)
+ printf("%2d %6d | ", p->matches[i], p->matches[i + 1]);
+ }
+ #endif
+ if (numPairs > 0)
+ {
+ lenRes = p->matches[numPairs - 2];
+ if (lenRes == p->numFastBytes)
+ {
+ const Byte *pby = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - 1;
+ UInt32 distance = p->matches[numPairs - 1] + 1;
+ UInt32 numAvail = p->numAvail;
+ if (numAvail > LZMA_MATCH_LEN_MAX)
+ numAvail = LZMA_MATCH_LEN_MAX;
+ {
+ const Byte *pby2 = pby - distance;
+ for (; lenRes < numAvail && pby[lenRes] == pby2[lenRes]; lenRes++);
+ }
+ }
+ }
+ p->additionalOffset++;
+ *numDistancePairsRes = numPairs;
+ return lenRes;
+}
+
+
+#define MakeAsChar(p) (p)->backPrev = (UInt32)(-1); (p)->prev1IsChar = False;
+#define MakeAsShortRep(p) (p)->backPrev = 0; (p)->prev1IsChar = False;
+#define IsShortRep(p) ((p)->backPrev == 0)
+
+static UInt32 GetRepLen1Price(CLzmaEnc *p, UInt32 state, UInt32 posState)
+{
+ return
+ GET_PRICE_0(p->isRepG0[state]) +
+ GET_PRICE_0(p->isRep0Long[state][posState]);
+}
+
+static UInt32 GetPureRepPrice(CLzmaEnc *p, UInt32 repIndex, UInt32 state, UInt32 posState)
+{
+ UInt32 price;
+ if (repIndex == 0)
+ {
+ price = GET_PRICE_0(p->isRepG0[state]);
+ price += GET_PRICE_1(p->isRep0Long[state][posState]);
+ }
+ else
+ {
+ price = GET_PRICE_1(p->isRepG0[state]);
+ if (repIndex == 1)
+ price += GET_PRICE_0(p->isRepG1[state]);
+ else
+ {
+ price += GET_PRICE_1(p->isRepG1[state]);
+ price += GET_PRICE(p->isRepG2[state], repIndex - 2);
+ }
+ }
+ return price;
+}
+
+static UInt32 GetRepPrice(CLzmaEnc *p, UInt32 repIndex, UInt32 len, UInt32 state, UInt32 posState)
+{
+ return p->repLenEnc.prices[posState][len - LZMA_MATCH_LEN_MIN] +
+ GetPureRepPrice(p, repIndex, state, posState);
+}
+
+static UInt32 Backward(CLzmaEnc *p, UInt32 *backRes, UInt32 cur)
+{
+ UInt32 posMem = p->opt[cur].posPrev;
+ UInt32 backMem = p->opt[cur].backPrev;
+ p->optimumEndIndex = cur;
+ do
+ {
+ if (p->opt[cur].prev1IsChar)
+ {
+ MakeAsChar(&p->opt[posMem])
+ p->opt[posMem].posPrev = posMem - 1;
+ if (p->opt[cur].prev2)
+ {
+ p->opt[posMem - 1].prev1IsChar = False;
+ p->opt[posMem - 1].posPrev = p->opt[cur].posPrev2;
+ p->opt[posMem - 1].backPrev = p->opt[cur].backPrev2;
+ }
+ }
+ {
+ UInt32 posPrev = posMem;
+ UInt32 backCur = backMem;
+
+ backMem = p->opt[posPrev].backPrev;
+ posMem = p->opt[posPrev].posPrev;
+
+ p->opt[posPrev].backPrev = backCur;
+ p->opt[posPrev].posPrev = cur;
+ cur = posPrev;
+ }
+ }
+ while (cur != 0);
+ *backRes = p->opt[0].backPrev;
+ p->optimumCurrentIndex = p->opt[0].posPrev;
+ return p->optimumCurrentIndex;
+}
+
+#define LIT_PROBS(pos, prevByte) (p->litProbs + ((((pos) & p->lpMask) << p->lc) + ((prevByte) >> (8 - p->lc))) * 0x300)
+
+static UInt32 GetOptimum(CLzmaEnc *p, UInt32 position, UInt32 *backRes)
+{
+ UInt32 numAvail, mainLen, numPairs, repMaxIndex, i, posState, lenEnd, len, cur;
+ UInt32 matchPrice, repMatchPrice, normalMatchPrice;
+ UInt32 reps[LZMA_NUM_REPS], repLens[LZMA_NUM_REPS];
+ UInt32 *matches;
+ const Byte *data;
+ Byte curByte, matchByte;
+ if (p->optimumEndIndex != p->optimumCurrentIndex)
+ {
+ const COptimal *opt = &p->opt[p->optimumCurrentIndex];
+ UInt32 lenRes = opt->posPrev - p->optimumCurrentIndex;
+ *backRes = opt->backPrev;
+ p->optimumCurrentIndex = opt->posPrev;
+ return lenRes;
+ }
+ p->optimumCurrentIndex = p->optimumEndIndex = 0;
+
+ if (p->additionalOffset == 0)
+ mainLen = ReadMatchDistances(p, &numPairs);
+ else
+ {
+ mainLen = p->longestMatchLength;
+ numPairs = p->numPairs;
+ }
+
+ numAvail = p->numAvail;
+ if (numAvail < 2)
+ {
+ *backRes = (UInt32)(-1);
+ return 1;
+ }
+ if (numAvail > LZMA_MATCH_LEN_MAX)
+ numAvail = LZMA_MATCH_LEN_MAX;
+
+ data = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - 1;
+ repMaxIndex = 0;
+ for (i = 0; i < LZMA_NUM_REPS; i++)
+ {
+ UInt32 lenTest;
+ const Byte *data2;
+ reps[i] = p->reps[i];
+ data2 = data - (reps[i] + 1);
+ if (data[0] != data2[0] || data[1] != data2[1])
+ {
+ repLens[i] = 0;
+ continue;
+ }
+ for (lenTest = 2; lenTest < numAvail && data[lenTest] == data2[lenTest]; lenTest++);
+ repLens[i] = lenTest;
+ if (lenTest > repLens[repMaxIndex])
+ repMaxIndex = i;
+ }
+ if (repLens[repMaxIndex] >= p->numFastBytes)
+ {
+ UInt32 lenRes;
+ *backRes = repMaxIndex;
+ lenRes = repLens[repMaxIndex];
+ MovePos(p, lenRes - 1);
+ return lenRes;
+ }
+
+ matches = p->matches;
+ if (mainLen >= p->numFastBytes)
+ {
+ *backRes = matches[numPairs - 1] + LZMA_NUM_REPS;
+ MovePos(p, mainLen - 1);
+ return mainLen;
+ }
+ curByte = *data;
+ matchByte = *(data - (reps[0] + 1));
+
+ if (mainLen < 2 && curByte != matchByte && repLens[repMaxIndex] < 2)
+ {
+ *backRes = (UInt32)-1;
+ return 1;
+ }
+
+ p->opt[0].state = (CState)p->state;
+
+ posState = (position & p->pbMask);
+
+ {
+ const CLzmaProb *probs = LIT_PROBS(position, *(data - 1));
+ p->opt[1].price = GET_PRICE_0(p->isMatch[p->state][posState]) +
+ (!IsCharState(p->state) ?
+ LitEnc_GetPriceMatched(probs, curByte, matchByte, p->ProbPrices) :
+ LitEnc_GetPrice(probs, curByte, p->ProbPrices));
+ }
+
+ MakeAsChar(&p->opt[1]);
+
+ matchPrice = GET_PRICE_1(p->isMatch[p->state][posState]);
+ repMatchPrice = matchPrice + GET_PRICE_1(p->isRep[p->state]);
+
+ if (matchByte == curByte)
+ {
+ UInt32 shortRepPrice = repMatchPrice + GetRepLen1Price(p, p->state, posState);
+ if (shortRepPrice < p->opt[1].price)
+ {
+ p->opt[1].price = shortRepPrice;
+ MakeAsShortRep(&p->opt[1]);
+ }
+ }
+ lenEnd = ((mainLen >= repLens[repMaxIndex]) ? mainLen : repLens[repMaxIndex]);
+
+ if (lenEnd < 2)
+ {
+ *backRes = p->opt[1].backPrev;
+ return 1;
+ }
+
+ p->opt[1].posPrev = 0;
+ for (i = 0; i < LZMA_NUM_REPS; i++)
+ p->opt[0].backs[i] = reps[i];
+
+ len = lenEnd;
+ do
+ p->opt[len--].price = kInfinityPrice;
+ while (len >= 2);
+
+ for (i = 0; i < LZMA_NUM_REPS; i++)
+ {
+ UInt32 repLen = repLens[i];
+ UInt32 price;
+ if (repLen < 2)
+ continue;
+ price = repMatchPrice + GetPureRepPrice(p, i, p->state, posState);
+ do
+ {
+ UInt32 curAndLenPrice = price + p->repLenEnc.prices[posState][repLen - 2];
+ COptimal *opt = &p->opt[repLen];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = 0;
+ opt->backPrev = i;
+ opt->prev1IsChar = False;
+ }
+ }
+ while (--repLen >= 2);
+ }
+
+ normalMatchPrice = matchPrice + GET_PRICE_0(p->isRep[p->state]);
+
+ len = ((repLens[0] >= 2) ? repLens[0] + 1 : 2);
+ if (len <= mainLen)
+ {
+ UInt32 offs = 0;
+ while (len > matches[offs])
+ offs += 2;
+ for (; ; len++)
+ {
+ COptimal *opt;
+ UInt32 distance = matches[offs + 1];
+
+ UInt32 curAndLenPrice = normalMatchPrice + p->lenEnc.prices[posState][len - LZMA_MATCH_LEN_MIN];
+ UInt32 lenToPosState = GetLenToPosState(len);
+ if (distance < kNumFullDistances)
+ curAndLenPrice += p->distancesPrices[lenToPosState][distance];
+ else
+ {
+ UInt32 slot;
+ GetPosSlot2(distance, slot);
+ curAndLenPrice += p->alignPrices[distance & kAlignMask] + p->posSlotPrices[lenToPosState][slot];
+ }
+ opt = &p->opt[len];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = 0;
+ opt->backPrev = distance + LZMA_NUM_REPS;
+ opt->prev1IsChar = False;
+ }
+ if (len == matches[offs])
+ {
+ offs += 2;
+ if (offs == numPairs)
+ break;
+ }
+ }
+ }
+
+ cur = 0;
+
+ #ifdef SHOW_STAT2
+ if (position >= 0)
+ {
+ unsigned i;
+ printf("\n pos = %4X", position);
+ for (i = cur; i <= lenEnd; i++)
+ printf("\nprice[%4X] = %d", position - cur + i, p->opt[i].price);
+ }
+ #endif
+
+ for (;;)
+ {
+ UInt32 numAvailFull, newLen, numPairs, posPrev, state, posState, startLen;
+ UInt32 curPrice, curAnd1Price, matchPrice, repMatchPrice;
+ Bool nextIsChar;
+ Byte curByte, matchByte;
+ const Byte *data;
+ COptimal *curOpt;
+ COptimal *nextOpt;
+
+ cur++;
+ if (cur == lenEnd)
+ return Backward(p, backRes, cur);
+
+ newLen = ReadMatchDistances(p, &numPairs);
+ if (newLen >= p->numFastBytes)
+ {
+ p->numPairs = numPairs;
+ p->longestMatchLength = newLen;
+ return Backward(p, backRes, cur);
+ }
+ position++;
+ curOpt = &p->opt[cur];
+ posPrev = curOpt->posPrev;
+ if (curOpt->prev1IsChar)
+ {
+ posPrev--;
+ if (curOpt->prev2)
+ {
+ state = p->opt[curOpt->posPrev2].state;
+ if (curOpt->backPrev2 < LZMA_NUM_REPS)
+ state = kRepNextStates[state];
+ else
+ state = kMatchNextStates[state];
+ }
+ else
+ state = p->opt[posPrev].state;
+ state = kLiteralNextStates[state];
+ }
+ else
+ state = p->opt[posPrev].state;
+ if (posPrev == cur - 1)
+ {
+ if (IsShortRep(curOpt))
+ state = kShortRepNextStates[state];
+ else
+ state = kLiteralNextStates[state];
+ }
+ else
+ {
+ UInt32 pos;
+ const COptimal *prevOpt;
+ if (curOpt->prev1IsChar && curOpt->prev2)
+ {
+ posPrev = curOpt->posPrev2;
+ pos = curOpt->backPrev2;
+ state = kRepNextStates[state];
+ }
+ else
+ {
+ pos = curOpt->backPrev;
+ if (pos < LZMA_NUM_REPS)
+ state = kRepNextStates[state];
+ else
+ state = kMatchNextStates[state];
+ }
+ prevOpt = &p->opt[posPrev];
+ if (pos < LZMA_NUM_REPS)
+ {
+ UInt32 i;
+ reps[0] = prevOpt->backs[pos];
+ for (i = 1; i <= pos; i++)
+ reps[i] = prevOpt->backs[i - 1];
+ for (; i < LZMA_NUM_REPS; i++)
+ reps[i] = prevOpt->backs[i];
+ }
+ else
+ {
+ UInt32 i;
+ reps[0] = (pos - LZMA_NUM_REPS);
+ for (i = 1; i < LZMA_NUM_REPS; i++)
+ reps[i] = prevOpt->backs[i - 1];
+ }
+ }
+ curOpt->state = (CState)state;
+
+ curOpt->backs[0] = reps[0];
+ curOpt->backs[1] = reps[1];
+ curOpt->backs[2] = reps[2];
+ curOpt->backs[3] = reps[3];
+
+ curPrice = curOpt->price;
+ nextIsChar = False;
+ data = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - 1;
+ curByte = *data;
+ matchByte = *(data - (reps[0] + 1));
+
+ posState = (position & p->pbMask);
+
+ curAnd1Price = curPrice + GET_PRICE_0(p->isMatch[state][posState]);
+ {
+ const CLzmaProb *probs = LIT_PROBS(position, *(data - 1));
+ curAnd1Price +=
+ (!IsCharState(state) ?
+ LitEnc_GetPriceMatched(probs, curByte, matchByte, p->ProbPrices) :
+ LitEnc_GetPrice(probs, curByte, p->ProbPrices));
+ }
+
+ nextOpt = &p->opt[cur + 1];
+
+ if (curAnd1Price < nextOpt->price)
+ {
+ nextOpt->price = curAnd1Price;
+ nextOpt->posPrev = cur;
+ MakeAsChar(nextOpt);
+ nextIsChar = True;
+ }
+
+ matchPrice = curPrice + GET_PRICE_1(p->isMatch[state][posState]);
+ repMatchPrice = matchPrice + GET_PRICE_1(p->isRep[state]);
+
+ if (matchByte == curByte && !(nextOpt->posPrev < cur && nextOpt->backPrev == 0))
+ {
+ UInt32 shortRepPrice = repMatchPrice + GetRepLen1Price(p, state, posState);
+ if (shortRepPrice <= nextOpt->price)
+ {
+ nextOpt->price = shortRepPrice;
+ nextOpt->posPrev = cur;
+ MakeAsShortRep(nextOpt);
+ nextIsChar = True;
+ }
+ }
+ numAvailFull = p->numAvail;
+ {
+ UInt32 temp = kNumOpts - 1 - cur;
+ if (temp < numAvailFull)
+ numAvailFull = temp;
+ }
+
+ if (numAvailFull < 2)
+ continue;
+ numAvail = (numAvailFull <= p->numFastBytes ? numAvailFull : p->numFastBytes);
+
+ if (!nextIsChar && matchByte != curByte) /* speed optimization */
+ {
+ /* try Literal + rep0 */
+ UInt32 temp;
+ UInt32 lenTest2;
+ const Byte *data2 = data - (reps[0] + 1);
+ UInt32 limit = p->numFastBytes + 1;
+ if (limit > numAvailFull)
+ limit = numAvailFull;
+
+ for (temp = 1; temp < limit && data[temp] == data2[temp]; temp++);
+ lenTest2 = temp - 1;
+ if (lenTest2 >= 2)
+ {
+ UInt32 state2 = kLiteralNextStates[state];
+ UInt32 posStateNext = (position + 1) & p->pbMask;
+ UInt32 nextRepMatchPrice = curAnd1Price +
+ GET_PRICE_1(p->isMatch[state2][posStateNext]) +
+ GET_PRICE_1(p->isRep[state2]);
+ /* for (; lenTest2 >= 2; lenTest2--) */
+ {
+ UInt32 curAndLenPrice;
+ COptimal *opt;
+ UInt32 offset = cur + 1 + lenTest2;
+ while (lenEnd < offset)
+ p->opt[++lenEnd].price = kInfinityPrice;
+ curAndLenPrice = nextRepMatchPrice + GetRepPrice(p, 0, lenTest2, state2, posStateNext);
+ opt = &p->opt[offset];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = cur + 1;
+ opt->backPrev = 0;
+ opt->prev1IsChar = True;
+ opt->prev2 = False;
+ }
+ }
+ }
+ }
+
+ startLen = 2; /* speed optimization */
+ {
+ UInt32 repIndex;
+ for (repIndex = 0; repIndex < LZMA_NUM_REPS; repIndex++)
+ {
+ UInt32 lenTest;
+ UInt32 lenTestTemp;
+ UInt32 price;
+ const Byte *data2 = data - (reps[repIndex] + 1);
+ if (data[0] != data2[0] || data[1] != data2[1])
+ continue;
+ for (lenTest = 2; lenTest < numAvail && data[lenTest] == data2[lenTest]; lenTest++);
+ while (lenEnd < cur + lenTest)
+ p->opt[++lenEnd].price = kInfinityPrice;
+ lenTestTemp = lenTest;
+ price = repMatchPrice + GetPureRepPrice(p, repIndex, state, posState);
+ do
+ {
+ UInt32 curAndLenPrice = price + p->repLenEnc.prices[posState][lenTest - 2];
+ COptimal *opt = &p->opt[cur + lenTest];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = cur;
+ opt->backPrev = repIndex;
+ opt->prev1IsChar = False;
+ }
+ }
+ while (--lenTest >= 2);
+ lenTest = lenTestTemp;
+
+ if (repIndex == 0)
+ startLen = lenTest + 1;
+
+ /* if (_maxMode) */
+ {
+ UInt32 lenTest2 = lenTest + 1;
+ UInt32 limit = lenTest2 + p->numFastBytes;
+ UInt32 nextRepMatchPrice;
+ if (limit > numAvailFull)
+ limit = numAvailFull;
+ for (; lenTest2 < limit && data[lenTest2] == data2[lenTest2]; lenTest2++);
+ lenTest2 -= lenTest + 1;
+ if (lenTest2 >= 2)
+ {
+ UInt32 state2 = kRepNextStates[state];
+ UInt32 posStateNext = (position + lenTest) & p->pbMask;
+ UInt32 curAndLenCharPrice =
+ price + p->repLenEnc.prices[posState][lenTest - 2] +
+ GET_PRICE_0(p->isMatch[state2][posStateNext]) +
+ LitEnc_GetPriceMatched(LIT_PROBS(position + lenTest, data[lenTest - 1]),
+ data[lenTest], data2[lenTest], p->ProbPrices);
+ state2 = kLiteralNextStates[state2];
+ posStateNext = (position + lenTest + 1) & p->pbMask;
+ nextRepMatchPrice = curAndLenCharPrice +
+ GET_PRICE_1(p->isMatch[state2][posStateNext]) +
+ GET_PRICE_1(p->isRep[state2]);
+
+ /* for (; lenTest2 >= 2; lenTest2--) */
+ {
+ UInt32 curAndLenPrice;
+ COptimal *opt;
+ UInt32 offset = cur + lenTest + 1 + lenTest2;
+ while (lenEnd < offset)
+ p->opt[++lenEnd].price = kInfinityPrice;
+ curAndLenPrice = nextRepMatchPrice + GetRepPrice(p, 0, lenTest2, state2, posStateNext);
+ opt = &p->opt[offset];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = cur + lenTest + 1;
+ opt->backPrev = 0;
+ opt->prev1IsChar = True;
+ opt->prev2 = True;
+ opt->posPrev2 = cur;
+ opt->backPrev2 = repIndex;
+ }
+ }
+ }
+ }
+ }
+ }
+ /* for (UInt32 lenTest = 2; lenTest <= newLen; lenTest++) */
+ if (newLen > numAvail)
+ {
+ newLen = numAvail;
+ for (numPairs = 0; newLen > matches[numPairs]; numPairs += 2);
+ matches[numPairs] = newLen;
+ numPairs += 2;
+ }
+ if (newLen >= startLen)
+ {
+ UInt32 normalMatchPrice = matchPrice + GET_PRICE_0(p->isRep[state]);
+ UInt32 offs, curBack, posSlot;
+ UInt32 lenTest;
+ while (lenEnd < cur + newLen)
+ p->opt[++lenEnd].price = kInfinityPrice;
+
+ offs = 0;
+ while (startLen > matches[offs])
+ offs += 2;
+ curBack = matches[offs + 1];
+ GetPosSlot2(curBack, posSlot);
+ for (lenTest = /*2*/ startLen; ; lenTest++)
+ {
+ UInt32 curAndLenPrice = normalMatchPrice + p->lenEnc.prices[posState][lenTest - LZMA_MATCH_LEN_MIN];
+ UInt32 lenToPosState = GetLenToPosState(lenTest);
+ COptimal *opt;
+ if (curBack < kNumFullDistances)
+ curAndLenPrice += p->distancesPrices[lenToPosState][curBack];
+ else
+ curAndLenPrice += p->posSlotPrices[lenToPosState][posSlot] + p->alignPrices[curBack & kAlignMask];
+
+ opt = &p->opt[cur + lenTest];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = cur;
+ opt->backPrev = curBack + LZMA_NUM_REPS;
+ opt->prev1IsChar = False;
+ }
+
+ if (/*_maxMode && */lenTest == matches[offs])
+ {
+ /* Try Match + Literal + Rep0 */
+ const Byte *data2 = data - (curBack + 1);
+ UInt32 lenTest2 = lenTest + 1;
+ UInt32 limit = lenTest2 + p->numFastBytes;
+ UInt32 nextRepMatchPrice;
+ if (limit > numAvailFull)
+ limit = numAvailFull;
+ for (; lenTest2 < limit && data[lenTest2] == data2[lenTest2]; lenTest2++);
+ lenTest2 -= lenTest + 1;
+ if (lenTest2 >= 2)
+ {
+ UInt32 state2 = kMatchNextStates[state];
+ UInt32 posStateNext = (position + lenTest) & p->pbMask;
+ UInt32 curAndLenCharPrice = curAndLenPrice +
+ GET_PRICE_0(p->isMatch[state2][posStateNext]) +
+ LitEnc_GetPriceMatched(LIT_PROBS(position + lenTest, data[lenTest - 1]),
+ data[lenTest], data2[lenTest], p->ProbPrices);
+ state2 = kLiteralNextStates[state2];
+ posStateNext = (posStateNext + 1) & p->pbMask;
+ nextRepMatchPrice = curAndLenCharPrice +
+ GET_PRICE_1(p->isMatch[state2][posStateNext]) +
+ GET_PRICE_1(p->isRep[state2]);
+
+ /* for (; lenTest2 >= 2; lenTest2--) */
+ {
+ UInt32 offset = cur + lenTest + 1 + lenTest2;
+ UInt32 curAndLenPrice;
+ COptimal *opt;
+ while (lenEnd < offset)
+ p->opt[++lenEnd].price = kInfinityPrice;
+ curAndLenPrice = nextRepMatchPrice + GetRepPrice(p, 0, lenTest2, state2, posStateNext);
+ opt = &p->opt[offset];
+ if (curAndLenPrice < opt->price)
+ {
+ opt->price = curAndLenPrice;
+ opt->posPrev = cur + lenTest + 1;
+ opt->backPrev = 0;
+ opt->prev1IsChar = True;
+ opt->prev2 = True;
+ opt->posPrev2 = cur;
+ opt->backPrev2 = curBack + LZMA_NUM_REPS;
+ }
+ }
+ }
+ offs += 2;
+ if (offs == numPairs)
+ break;
+ curBack = matches[offs + 1];
+ if (curBack >= kNumFullDistances)
+ GetPosSlot2(curBack, posSlot);
+ }
+ }
+ }
+ }
+}
+
+#define ChangePair(smallDist, bigDist) (((bigDist) >> 7) > (smallDist))
+
+static UInt32 GetOptimumFast(CLzmaEnc *p, UInt32 *backRes)
+{
+ UInt32 numAvail, mainLen, mainDist, numPairs, repIndex, repLen, i;
+ const Byte *data;
+ const UInt32 *matches;
+
+ if (p->additionalOffset == 0)
+ mainLen = ReadMatchDistances(p, &numPairs);
+ else
+ {
+ mainLen = p->longestMatchLength;
+ numPairs = p->numPairs;
+ }
+
+ numAvail = p->numAvail;
+ *backRes = (UInt32)-1;
+ if (numAvail < 2)
+ return 1;
+ if (numAvail > LZMA_MATCH_LEN_MAX)
+ numAvail = LZMA_MATCH_LEN_MAX;
+ data = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - 1;
+
+ repLen = repIndex = 0;
+ for (i = 0; i < LZMA_NUM_REPS; i++)
+ {
+ UInt32 len;
+ const Byte *data2 = data - (p->reps[i] + 1);
+ if (data[0] != data2[0] || data[1] != data2[1])
+ continue;
+ for (len = 2; len < numAvail && data[len] == data2[len]; len++);
+ if (len >= p->numFastBytes)
+ {
+ *backRes = i;
+ MovePos(p, len - 1);
+ return len;
+ }
+ if (len > repLen)
+ {
+ repIndex = i;
+ repLen = len;
+ }
+ }
+
+ matches = p->matches;
+ if (mainLen >= p->numFastBytes)
+ {
+ *backRes = matches[numPairs - 1] + LZMA_NUM_REPS;
+ MovePos(p, mainLen - 1);
+ return mainLen;
+ }
+
+ mainDist = 0; /* for GCC */
+ if (mainLen >= 2)
+ {
+ mainDist = matches[numPairs - 1];
+ while (numPairs > 2 && mainLen == matches[numPairs - 4] + 1)
+ {
+ if (!ChangePair(matches[numPairs - 3], mainDist))
+ break;
+ numPairs -= 2;
+ mainLen = matches[numPairs - 2];
+ mainDist = matches[numPairs - 1];
+ }
+ if (mainLen == 2 && mainDist >= 0x80)
+ mainLen = 1;
+ }
+
+ if (repLen >= 2 && (
+ (repLen + 1 >= mainLen) ||
+ (repLen + 2 >= mainLen && mainDist >= (1 << 9)) ||
+ (repLen + 3 >= mainLen && mainDist >= (1 << 15))))
+ {
+ *backRes = repIndex;
+ MovePos(p, repLen - 1);
+ return repLen;
+ }
+
+ if (mainLen < 2 || numAvail <= 2)
+ return 1;
+
+ p->longestMatchLength = ReadMatchDistances(p, &p->numPairs);
+ if (p->longestMatchLength >= 2)
+ {
+ UInt32 newDistance = matches[p->numPairs - 1];
+ if ((p->longestMatchLength >= mainLen && newDistance < mainDist) ||
+ (p->longestMatchLength == mainLen + 1 && !ChangePair(mainDist, newDistance)) ||
+ (p->longestMatchLength > mainLen + 1) ||
+ (p->longestMatchLength + 1 >= mainLen && mainLen >= 3 && ChangePair(newDistance, mainDist)))
+ return 1;
+ }
+
+ data = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - 1;
+ for (i = 0; i < LZMA_NUM_REPS; i++)
+ {
+ UInt32 len, limit;
+ const Byte *data2 = data - (p->reps[i] + 1);
+ if (data[0] != data2[0] || data[1] != data2[1])
+ continue;
+ limit = mainLen - 1;
+ for (len = 2; len < limit && data[len] == data2[len]; len++);
+ if (len >= limit)
+ return 1;
+ }
+ *backRes = mainDist + LZMA_NUM_REPS;
+ MovePos(p, mainLen - 2);
+ return mainLen;
+}
+
+static void WriteEndMarker(CLzmaEnc *p, UInt32 posState)
+{
+ UInt32 len;
+ RangeEnc_EncodeBit(&p->rc, &p->isMatch[p->state][posState], 1);
+ RangeEnc_EncodeBit(&p->rc, &p->isRep[p->state], 0);
+ p->state = kMatchNextStates[p->state];
+ len = LZMA_MATCH_LEN_MIN;
+ LenEnc_Encode2(&p->lenEnc, &p->rc, len - LZMA_MATCH_LEN_MIN, posState, !p->fastMode, p->ProbPrices);
+ RcTree_Encode(&p->rc, p->posSlotEncoder[GetLenToPosState(len)], kNumPosSlotBits, (1 << kNumPosSlotBits) - 1);
+ RangeEnc_EncodeDirectBits(&p->rc, (((UInt32)1 << 30) - 1) >> kNumAlignBits, 30 - kNumAlignBits);
+ RcTree_ReverseEncode(&p->rc, p->posAlignEncoder, kNumAlignBits, kAlignMask);
+}
+
+static SRes CheckErrors(CLzmaEnc *p)
+{
+ if (p->result != SZ_OK)
+ return p->result;
+ if (p->rc.res != SZ_OK)
+ p->result = SZ_ERROR_WRITE;
+ if (p->matchFinderBase.result != SZ_OK)
+ p->result = SZ_ERROR_READ;
+ if (p->result != SZ_OK)
+ p->finished = True;
+ return p->result;
+}
+
+static SRes Flush(CLzmaEnc *p, UInt32 nowPos)
+{
+ /* ReleaseMFStream(); */
+ p->finished = True;
+ if (p->writeEndMark)
+ WriteEndMarker(p, nowPos & p->pbMask);
+ RangeEnc_FlushData(&p->rc);
+ RangeEnc_FlushStream(&p->rc);
+ return CheckErrors(p);
+}
+
+static void FillAlignPrices(CLzmaEnc *p)
+{
+ UInt32 i;
+ for (i = 0; i < kAlignTableSize; i++)
+ p->alignPrices[i] = RcTree_ReverseGetPrice(p->posAlignEncoder, kNumAlignBits, i, p->ProbPrices);
+ p->alignPriceCount = 0;
+}
+
+static void FillDistancesPrices(CLzmaEnc *p)
+{
+ UInt32 tempPrices[kNumFullDistances];
+ UInt32 i, lenToPosState;
+ for (i = kStartPosModelIndex; i < kNumFullDistances; i++)
+ {
+ UInt32 posSlot = GetPosSlot1(i);
+ UInt32 footerBits = ((posSlot >> 1) - 1);
+ UInt32 base = ((2 | (posSlot & 1)) << footerBits);
+ tempPrices[i] = RcTree_ReverseGetPrice(p->posEncoders + base - posSlot - 1, footerBits, i - base, p->ProbPrices);
+ }
+
+ for (lenToPosState = 0; lenToPosState < kNumLenToPosStates; lenToPosState++)
+ {
+ UInt32 posSlot;
+ const CLzmaProb *encoder = p->posSlotEncoder[lenToPosState];
+ UInt32 *posSlotPrices = p->posSlotPrices[lenToPosState];
+ for (posSlot = 0; posSlot < p->distTableSize; posSlot++)
+ posSlotPrices[posSlot] = RcTree_GetPrice(encoder, kNumPosSlotBits, posSlot, p->ProbPrices);
+ for (posSlot = kEndPosModelIndex; posSlot < p->distTableSize; posSlot++)
+ posSlotPrices[posSlot] += ((((posSlot >> 1) - 1) - kNumAlignBits) << kNumBitPriceShiftBits);
+
+ {
+ UInt32 *distancesPrices = p->distancesPrices[lenToPosState];
+ UInt32 i;
+ for (i = 0; i < kStartPosModelIndex; i++)
+ distancesPrices[i] = posSlotPrices[i];
+ for (; i < kNumFullDistances; i++)
+ distancesPrices[i] = posSlotPrices[GetPosSlot1(i)] + tempPrices[i];
+ }
+ }
+ p->matchPriceCount = 0;
+}
+
+static void LzmaEnc_Construct(CLzmaEnc *p)
+{
+ RangeEnc_Construct(&p->rc);
+ MatchFinder_Construct(&p->matchFinderBase);
+ #ifndef _7ZIP_ST
+ MatchFinderMt_Construct(&p->matchFinderMt);
+ p->matchFinderMt.MatchFinder = &p->matchFinderBase;
+ #endif
+
+ {
+ CLzmaEncProps props;
+ LzmaEncProps_Init(&props);
+ LzmaEnc_SetProps(p, &props);
+ }
+
+ #ifndef LZMA_LOG_BSR
+ LzmaEnc_FastPosInit(p->g_FastPos);
+ #endif
+
+ LzmaEnc_InitPriceTables(p->ProbPrices);
+ p->litProbs = 0;
+ p->saveState.litProbs = 0;
+}
+
+CLzmaEncHandle LzmaEnc_Create(ISzAlloc *alloc)
+{
+ void *p;
+ p = alloc->Alloc(alloc, sizeof(CLzmaEnc));
+ if (p != 0)
+ LzmaEnc_Construct((CLzmaEnc *)p);
+ return p;
+}
+
+static void LzmaEnc_FreeLits(CLzmaEnc *p, ISzAlloc *alloc)
+{
+ alloc->Free(alloc, p->litProbs);
+ alloc->Free(alloc, p->saveState.litProbs);
+ p->litProbs = 0;
+ p->saveState.litProbs = 0;
+}
+
+static void LzmaEnc_Destruct(CLzmaEnc *p, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ #ifndef _7ZIP_ST
+ MatchFinderMt_Destruct(&p->matchFinderMt, allocBig);
+ #endif
+ MatchFinder_Free(&p->matchFinderBase, allocBig);
+ LzmaEnc_FreeLits(p, alloc);
+ RangeEnc_Free(&p->rc, alloc);
+}
+
+void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ LzmaEnc_Destruct((CLzmaEnc *)p, alloc, allocBig);
+ alloc->Free(alloc, p);
+}
+
+static SRes LzmaEnc_CodeOneBlock(CLzmaEnc *p, Bool useLimits, UInt32 maxPackSize, UInt32 maxUnpackSize)
+{
+ UInt32 nowPos32, startPos32;
+ if (p->needInit)
+ {
+ p->matchFinder.Init(p->matchFinderObj);
+ p->needInit = 0;
+ }
+
+ if (p->finished)
+ return p->result;
+ RINOK(CheckErrors(p));
+
+ nowPos32 = (UInt32)p->nowPos64;
+ startPos32 = nowPos32;
+
+ if (p->nowPos64 == 0)
+ {
+ UInt32 numPairs;
+ Byte curByte;
+ if (p->matchFinder.GetNumAvailableBytes(p->matchFinderObj) == 0)
+ return Flush(p, nowPos32);
+ ReadMatchDistances(p, &numPairs);
+ RangeEnc_EncodeBit(&p->rc, &p->isMatch[p->state][0], 0);
+ p->state = kLiteralNextStates[p->state];
+ curByte = p->matchFinder.GetIndexByte(p->matchFinderObj, 0 - p->additionalOffset);
+ LitEnc_Encode(&p->rc, p->litProbs, curByte);
+ p->additionalOffset--;
+ nowPos32++;
+ }
+
+ if (p->matchFinder.GetNumAvailableBytes(p->matchFinderObj) != 0)
+ for (;;)
+ {
+ UInt32 pos, len, posState;
+
+ if (p->fastMode)
+ len = GetOptimumFast(p, &pos);
+ else
+ len = GetOptimum(p, nowPos32, &pos);
+
+ #ifdef SHOW_STAT2
+ printf("\n pos = %4X, len = %d pos = %d", nowPos32, len, pos);
+ #endif
+
+ posState = nowPos32 & p->pbMask;
+ if (len == 1 && pos == (UInt32)-1)
+ {
+ Byte curByte;
+ CLzmaProb *probs;
+ const Byte *data;
+
+ RangeEnc_EncodeBit(&p->rc, &p->isMatch[p->state][posState], 0);
+ data = p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - p->additionalOffset;
+ curByte = *data;
+ probs = LIT_PROBS(nowPos32, *(data - 1));
+ if (IsCharState(p->state))
+ LitEnc_Encode(&p->rc, probs, curByte);
+ else
+ LitEnc_EncodeMatched(&p->rc, probs, curByte, *(data - p->reps[0] - 1));
+ p->state = kLiteralNextStates[p->state];
+ }
+ else
+ {
+ RangeEnc_EncodeBit(&p->rc, &p->isMatch[p->state][posState], 1);
+ if (pos < LZMA_NUM_REPS)
+ {
+ RangeEnc_EncodeBit(&p->rc, &p->isRep[p->state], 1);
+ if (pos == 0)
+ {
+ RangeEnc_EncodeBit(&p->rc, &p->isRepG0[p->state], 0);
+ RangeEnc_EncodeBit(&p->rc, &p->isRep0Long[p->state][posState], ((len == 1) ? 0 : 1));
+ }
+ else
+ {
+ UInt32 distance = p->reps[pos];
+ RangeEnc_EncodeBit(&p->rc, &p->isRepG0[p->state], 1);
+ if (pos == 1)
+ RangeEnc_EncodeBit(&p->rc, &p->isRepG1[p->state], 0);
+ else
+ {
+ RangeEnc_EncodeBit(&p->rc, &p->isRepG1[p->state], 1);
+ RangeEnc_EncodeBit(&p->rc, &p->isRepG2[p->state], pos - 2);
+ if (pos == 3)
+ p->reps[3] = p->reps[2];
+ p->reps[2] = p->reps[1];
+ }
+ p->reps[1] = p->reps[0];
+ p->reps[0] = distance;
+ }
+ if (len == 1)
+ p->state = kShortRepNextStates[p->state];
+ else
+ {
+ LenEnc_Encode2(&p->repLenEnc, &p->rc, len - LZMA_MATCH_LEN_MIN, posState, !p->fastMode, p->ProbPrices);
+ p->state = kRepNextStates[p->state];
+ }
+ }
+ else
+ {
+ UInt32 posSlot;
+ RangeEnc_EncodeBit(&p->rc, &p->isRep[p->state], 0);
+ p->state = kMatchNextStates[p->state];
+ LenEnc_Encode2(&p->lenEnc, &p->rc, len - LZMA_MATCH_LEN_MIN, posState, !p->fastMode, p->ProbPrices);
+ pos -= LZMA_NUM_REPS;
+ GetPosSlot(pos, posSlot);
+ RcTree_Encode(&p->rc, p->posSlotEncoder[GetLenToPosState(len)], kNumPosSlotBits, posSlot);
+
+ if (posSlot >= kStartPosModelIndex)
+ {
+ UInt32 footerBits = ((posSlot >> 1) - 1);
+ UInt32 base = ((2 | (posSlot & 1)) << footerBits);
+ UInt32 posReduced = pos - base;
+
+ if (posSlot < kEndPosModelIndex)
+ RcTree_ReverseEncode(&p->rc, p->posEncoders + base - posSlot - 1, footerBits, posReduced);
+ else
+ {
+ RangeEnc_EncodeDirectBits(&p->rc, posReduced >> kNumAlignBits, footerBits - kNumAlignBits);
+ RcTree_ReverseEncode(&p->rc, p->posAlignEncoder, kNumAlignBits, posReduced & kAlignMask);
+ p->alignPriceCount++;
+ }
+ }
+ p->reps[3] = p->reps[2];
+ p->reps[2] = p->reps[1];
+ p->reps[1] = p->reps[0];
+ p->reps[0] = pos;
+ p->matchPriceCount++;
+ }
+ }
+ p->additionalOffset -= len;
+ nowPos32 += len;
+ if (p->additionalOffset == 0)
+ {
+ UInt32 processed;
+ if (!p->fastMode)
+ {
+ if (p->matchPriceCount >= (1 << 7))
+ FillDistancesPrices(p);
+ if (p->alignPriceCount >= kAlignTableSize)
+ FillAlignPrices(p);
+ }
+ if (p->matchFinder.GetNumAvailableBytes(p->matchFinderObj) == 0)
+ break;
+ processed = nowPos32 - startPos32;
+ if (useLimits)
+ {
+ if (processed + kNumOpts + 300 >= maxUnpackSize ||
+ RangeEnc_GetProcessed(&p->rc) + kNumOpts * 2 >= maxPackSize)
+ break;
+ }
+ else if (processed >= (1 << 15))
+ {
+ p->nowPos64 += nowPos32 - startPos32;
+ return CheckErrors(p);
+ }
+ }
+ }
+ p->nowPos64 += nowPos32 - startPos32;
+ return Flush(p, nowPos32);
+}
+
+#define kBigHashDicLimit ((UInt32)1 << 24)
+
+static SRes LzmaEnc_Alloc(CLzmaEnc *p, UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ UInt32 beforeSize = kNumOpts;
+ Bool btMode;
+ if (!RangeEnc_Alloc(&p->rc, alloc))
+ return SZ_ERROR_MEM;
+ btMode = (p->matchFinderBase.btMode != 0);
+ #ifndef _7ZIP_ST
+ p->mtMode = (p->multiThread && !p->fastMode && btMode);
+ #endif
+
+ {
+ unsigned lclp = p->lc + p->lp;
+ if (p->litProbs == 0 || p->saveState.litProbs == 0 || p->lclp != lclp)
+ {
+ LzmaEnc_FreeLits(p, alloc);
+ p->litProbs = (CLzmaProb *)alloc->Alloc(alloc, (0x300 << lclp) * sizeof(CLzmaProb));
+ p->saveState.litProbs = (CLzmaProb *)alloc->Alloc(alloc, (0x300 << lclp) * sizeof(CLzmaProb));
+ if (p->litProbs == 0 || p->saveState.litProbs == 0)
+ {
+ LzmaEnc_FreeLits(p, alloc);
+ return SZ_ERROR_MEM;
+ }
+ p->lclp = lclp;
+ }
+ }
+
+ p->matchFinderBase.bigHash = (p->dictSize > kBigHashDicLimit);
+
+ if (beforeSize + p->dictSize < keepWindowSize)
+ beforeSize = keepWindowSize - p->dictSize;
+
+ #ifndef _7ZIP_ST
+ if (p->mtMode)
+ {
+ RINOK(MatchFinderMt_Create(&p->matchFinderMt, p->dictSize, beforeSize, p->numFastBytes, LZMA_MATCH_LEN_MAX, allocBig));
+ p->matchFinderObj = &p->matchFinderMt;
+ MatchFinderMt_CreateVTable(&p->matchFinderMt, &p->matchFinder);
+ }
+ else
+ #endif
+ {
+ if (!MatchFinder_Create(&p->matchFinderBase, p->dictSize, beforeSize, p->numFastBytes, LZMA_MATCH_LEN_MAX, allocBig))
+ return SZ_ERROR_MEM;
+ p->matchFinderObj = &p->matchFinderBase;
+ MatchFinder_CreateVTable(&p->matchFinderBase, &p->matchFinder);
+ }
+ return SZ_OK;
+}
+
+static void LzmaEnc_Init(CLzmaEnc *p)
+{
+ UInt32 i;
+ p->state = 0;
+ for (i = 0 ; i < LZMA_NUM_REPS; i++)
+ p->reps[i] = 0;
+
+ RangeEnc_Init(&p->rc);
+
+
+ for (i = 0; i < kNumStates; i++)
+ {
+ UInt32 j;
+ for (j = 0; j < LZMA_NUM_PB_STATES_MAX; j++)
+ {
+ p->isMatch[i][j] = kProbInitValue;
+ p->isRep0Long[i][j] = kProbInitValue;
+ }
+ p->isRep[i] = kProbInitValue;
+ p->isRepG0[i] = kProbInitValue;
+ p->isRepG1[i] = kProbInitValue;
+ p->isRepG2[i] = kProbInitValue;
+ }
+
+ {
+ UInt32 num = 0x300 << (p->lp + p->lc);
+ for (i = 0; i < num; i++)
+ p->litProbs[i] = kProbInitValue;
+ }
+
+ {
+ for (i = 0; i < kNumLenToPosStates; i++)
+ {
+ CLzmaProb *probs = p->posSlotEncoder[i];
+ UInt32 j;
+ for (j = 0; j < (1 << kNumPosSlotBits); j++)
+ probs[j] = kProbInitValue;
+ }
+ }
+ {
+ for (i = 0; i < kNumFullDistances - kEndPosModelIndex; i++)
+ p->posEncoders[i] = kProbInitValue;
+ }
+
+ LenEnc_Init(&p->lenEnc.p);
+ LenEnc_Init(&p->repLenEnc.p);
+
+ for (i = 0; i < (1 << kNumAlignBits); i++)
+ p->posAlignEncoder[i] = kProbInitValue;
+
+ p->optimumEndIndex = 0;
+ p->optimumCurrentIndex = 0;
+ p->additionalOffset = 0;
+
+ p->pbMask = (1 << p->pb) - 1;
+ p->lpMask = (1 << p->lp) - 1;
+}
+
+static void LzmaEnc_InitPrices(CLzmaEnc *p)
+{
+ if (!p->fastMode)
+ {
+ FillDistancesPrices(p);
+ FillAlignPrices(p);
+ }
+
+ p->lenEnc.tableSize =
+ p->repLenEnc.tableSize =
+ p->numFastBytes + 1 - LZMA_MATCH_LEN_MIN;
+ LenPriceEnc_UpdateTables(&p->lenEnc, 1 << p->pb, p->ProbPrices);
+ LenPriceEnc_UpdateTables(&p->repLenEnc, 1 << p->pb, p->ProbPrices);
+}
+
+static SRes LzmaEnc_AllocAndInit(CLzmaEnc *p, UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ UInt32 i;
+ for (i = 0; i < (UInt32)kDicLogSizeMaxCompress; i++)
+ if (p->dictSize <= ((UInt32)1 << i))
+ break;
+ p->distTableSize = i * 2;
+
+ p->finished = False;
+ p->result = SZ_OK;
+ RINOK(LzmaEnc_Alloc(p, keepWindowSize, alloc, allocBig));
+ LzmaEnc_Init(p);
+ LzmaEnc_InitPrices(p);
+ p->nowPos64 = 0;
+ return SZ_OK;
+}
+
+static void LzmaEnc_SetInputBuf(CLzmaEnc *p, const Byte *src, SizeT srcLen)
+{
+ p->matchFinderBase.directInput = 1;
+ p->matchFinderBase.bufferBase = (Byte *)src;
+ p->matchFinderBase.directInputRem = srcLen;
+}
+
+static SRes LzmaEnc_MemPrepare(CLzmaEncHandle pp, const Byte *src, SizeT srcLen,
+ UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ CLzmaEnc *p = (CLzmaEnc *)pp;
+ LzmaEnc_SetInputBuf(p, src, srcLen);
+ p->needInit = 1;
+
+ return LzmaEnc_AllocAndInit(p, keepWindowSize, alloc, allocBig);
+}
+
+static void LzmaEnc_Finish(CLzmaEncHandle pp)
+{
+ #ifndef _7ZIP_ST
+ CLzmaEnc *p = (CLzmaEnc *)pp;
+ if (p->mtMode)
+ MatchFinderMt_ReleaseStream(&p->matchFinderMt);
+ #else
+ pp = pp;
+ #endif
+}
+
+typedef struct
+{
+ ISeqOutStream funcTable;
+ Byte *data;
+ SizeT rem;
+ Bool overflow;
+} CSeqOutStreamBuf;
+
+static size_t MyWrite(void *pp, const void *data, size_t size)
+{
+ CSeqOutStreamBuf *p = (CSeqOutStreamBuf *)pp;
+ if (p->rem < size)
+ {
+ size = p->rem;
+ p->overflow = True;
+ }
+ memcpy(p->data, data, size);
+ p->rem -= size;
+ p->data += size;
+ return size;
+}
+
+static SRes LzmaEnc_Encode2(CLzmaEnc *p, ICompressProgress *progress)
+{
+ SRes res = SZ_OK;
+
+ #ifndef _7ZIP_ST
+ Byte allocaDummy[0x300];
+ int i = 0;
+ for (i = 0; i < 16; i++)
+ allocaDummy[i] = (Byte)i;
+ #endif
+
+ for (;;)
+ {
+ res = LzmaEnc_CodeOneBlock(p, False, 0, 0);
+ if (res != SZ_OK || p->finished != 0)
+ break;
+ if (progress != 0)
+ {
+ res = progress->Progress(progress, p->nowPos64, RangeEnc_GetProcessed(&p->rc));
+ if (res != SZ_OK)
+ {
+ res = SZ_ERROR_PROGRESS;
+ break;
+ }
+ }
+ }
+ LzmaEnc_Finish(p);
+ return res;
+}
+
+SRes LzmaEnc_WriteProperties(CLzmaEncHandle pp, Byte *props, SizeT *size)
+{
+ CLzmaEnc *p = (CLzmaEnc *)pp;
+ int i;
+ UInt32 dictSize = p->dictSize;
+ if (*size < LZMA_PROPS_SIZE)
+ return SZ_ERROR_PARAM;
+ *size = LZMA_PROPS_SIZE;
+ props[0] = (Byte)((p->pb * 5 + p->lp) * 9 + p->lc);
+
+ for (i = 11; i <= 30; i++)
+ {
+ if (dictSize <= ((UInt32)2 << i))
+ {
+ dictSize = (2 << i);
+ break;
+ }
+ if (dictSize <= ((UInt32)3 << i))
+ {
+ dictSize = (3 << i);
+ break;
+ }
+ }
+
+ for (i = 0; i < 4; i++)
+ props[1 + i] = (Byte)(dictSize >> (8 * i));
+ return SZ_OK;
+}
+
+SRes LzmaEnc_MemEncode(CLzmaEncHandle pp, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
+ int writeEndMark, ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig)
+{
+ SRes res;
+ CLzmaEnc *p = (CLzmaEnc *)pp;
+
+ CSeqOutStreamBuf outStream;
+
+ LzmaEnc_SetInputBuf(p, src, srcLen);
+
+ outStream.funcTable.Write = MyWrite;
+ outStream.data = dest;
+ outStream.rem = *destLen;
+ outStream.overflow = False;
+
+ p->writeEndMark = writeEndMark;
+
+ p->rc.outStream = &outStream.funcTable;
+ res = LzmaEnc_MemPrepare(pp, src, srcLen, 0, alloc, allocBig);
+ if (res == SZ_OK)
+ res = LzmaEnc_Encode2(p, progress);
+
+ *destLen -= outStream.rem;
+ if (outStream.overflow)
+ return SZ_ERROR_OUTPUT_EOF;
+ return res;
+}
--- /dev/null
+++ b/lib/lzma/Makefile
@@ -0,0 +1,7 @@
+lzma_compress-objs := LzFind.o LzmaEnc.o
+lzma_decompress-objs := LzmaDec.o
+
+obj-$(CONFIG_LZMA_COMPRESS) += lzma_compress.o
+obj-$(CONFIG_LZMA_DECOMPRESS) += lzma_decompress.o
+
+EXTRA_CFLAGS += -Iinclude/linux -Iinclude/linux/lzma -include types.h
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