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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 14:26:20 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 14:26:20 +0000
commitd69516264bbac7997c5ee35237c4af1749e4f8c8 (patch)
tree5f7dea8e7c5219190fadbba258c85093b257c5d4 /LzmaDec.h
parentInitial commit. (diff)
downloadpdlzip-d69516264bbac7997c5ee35237c4af1749e4f8c8.tar.xz
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Adding upstream version 1.12.upstream/1.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'LzmaDec.h')
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1 files changed, 90 insertions, 0 deletions
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+/* LzmaDec.h -- LZMA Decoder
+2009-02-07 : Igor Pavlov : Public domain */
+
+/* ---------- LZMA Properties ---------- */
+
+#define LZMA_PROPS_SIZE 5
+
+
+/* ---------- 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
+{
+ int *probs;
+ uint8_t *dic;
+ const uint8_t *buf;
+ uint32_t range, code;
+ uint32_t dicPos;
+ uint32_t dicBufSize;
+ uint32_t processedPos;
+ uint32_t checkDicSize;
+ unsigned lc, lp, pb;
+ State state;
+ uint32_t reps[4];
+ unsigned remainLen;
+ uint32_t numProbs;
+ unsigned tempBufSize;
+ bool needFlush;
+ uint8_t tempBuf[LZMA_REQUIRED_INPUT_MAX];
+} CLzmaDec;
+
+
+/* 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 */
+
+
+bool LzmaDec_Init(CLzmaDec *p, const uint8_t *raw_props);
+void LzmaDec_Free(CLzmaDec *p);
+
+
+/* ---------- Buffer Interface ---------- */
+
+/* It's zlib-like interface.
+
+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).
+*/
+
+bool LzmaDec_DecodeToBuf( CLzmaDec *p, uint8_t *dest, uint32_t *destLen,
+ const uint8_t *src, uint32_t *srcLen,
+ ELzmaFinishMode finishMode, ELzmaStatus *status );