Adding upstream version 1.0~rc2.upstream/1.0_rc2

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 191 insertions, 0 deletions

diff --git a/LzmaDec.h b/LzmaDec.h
new file mode 100644
index 0000000..2a7741f
--- /dev/null
+++ b/LzmaDec.h
@@ -0,0 +1,191 @@
+/* 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;

+

+/* LzmaProps_Decode - decodes properties

+Returns:

+  SZ_OK

+  SZ_ERROR_UNSUPPORTED - Unsupported properties

+*/

+

+SRes LzmaProps_Decode(CLzmaProps *p, const Byte *data, unsigned size);

+

+

+/* ---------- 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; }

+

+void LzmaDec_Init(CLzmaDec *p);

+

+/* 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 */

+

+

+/* ---------- Interfaces ---------- */

+

+/* There are 3 levels of interfaces:

+     1) Dictionary Interface

+     2) Buffer Interface

+     3) One Call Interface

+   You can select any of these interfaces, but don't mix functions from different

+   groups for same object. */

+

+

+SRes LzmaDec_Allocate(CLzmaDec *state, const Byte *prop, unsigned propsSize, ISzAlloc *alloc);

+void LzmaDec_Free(CLzmaDec *state, ISzAlloc *alloc);

+

+/* ---------- Dictionary Interface ---------- */

+

+/* You can use it, if you want to eliminate the overhead for data copying from

+   dictionary to some other external buffer.

+   You must work with CLzmaDec variables directly in this interface.

+

+   STEPS:

+     LzmaDec_Constr()

+     LzmaDec_Allocate()

+     for (each new stream)

+     {

+       LzmaDec_Init()

+       while (it needs more decompression)

+       {

+         LzmaDec_DecodeToDic()

+         use data from CLzmaDec::dic and update CLzmaDec::dicPos

+       }

+     }

+     LzmaDec_Free()

+*/

+

+/* LzmaDec_DecodeToDic

+

+   The decoding to internal dictionary buffer (CLzmaDec::dic).

+   You must manually update CLzmaDec::dicPos, if it reaches CLzmaDec::dicBufSize !!!

+

+finishMode:

+  It has meaning only if the decoding reaches output limit (dicLimit).

+  LZMA_FINISH_ANY - Decode just dicLimit bytes.

+  LZMA_FINISH_END - Stream must be finished after dicLimit.

+

+Returns:

+  SZ_OK

+    status:

+      LZMA_STATUS_FINISHED_WITH_MARK

+      LZMA_STATUS_NOT_FINISHED

+      LZMA_STATUS_NEEDS_MORE_INPUT

+      LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK

+  SZ_ERROR_DATA - Data error

+*/

+

+SRes LzmaDec_DecodeToDic(CLzmaDec *p, SizeT dicLimit,

+    const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status);

+

+

+/* ---------- Buffer Interface ---------- */

+

+/* It's zlib-like interface.

+   See LzmaDec_DecodeToDic description for information about STEPS and return results,

+   but you must use LzmaDec_DecodeToBuf instead of LzmaDec_DecodeToDic and you don't need

+   to work with CLzmaDec variables manually.

+

+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).

+*/

+

+SRes LzmaDec_DecodeToBuf(CLzmaDec *p, Byte *dest, SizeT *destLen,

+    const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status);

+

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif