zstd: Update to 1.5.7

Adds supports for x86_64 assembly for Windows/MinGW builds.
This commit is contained in:
Jakub Marcowski 2025-03-04 20:52:56 +01:00 committed by Rémi Verschelde
parent 5904f4f2d4
commit 6b09f6e6d9
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GPG key ID: C3336907360768E1
50 changed files with 2737 additions and 1637 deletions

373
thirdparty/zstd/zstd.h vendored
View file

@ -7,17 +7,22 @@
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#if defined (__cplusplus)
extern "C" {
#endif
#ifndef ZSTD_H_235446
#define ZSTD_H_235446
/* ====== Dependencies ======*/
#include <limits.h> /* INT_MAX */
#include <stddef.h> /* size_t */
#include "zstd_errors.h" /* list of errors */
#if defined(ZSTD_STATIC_LINKING_ONLY) && !defined(ZSTD_H_ZSTD_STATIC_LINKING_ONLY)
#include <limits.h> /* INT_MAX */
#endif /* ZSTD_STATIC_LINKING_ONLY */
#if defined (__cplusplus)
extern "C" {
#endif
/* ===== ZSTDLIB_API : control library symbols visibility ===== */
#ifndef ZSTDLIB_VISIBLE
@ -57,7 +62,7 @@ extern "C" {
#else
# if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
# define ZSTD_DEPRECATED(message) [[deprecated(message)]]
# elif (defined(GNUC) && (GNUC > 4 || (GNUC == 4 && GNUC_MINOR >= 5))) || defined(__clang__)
# elif (defined(GNUC) && (GNUC > 4 || (GNUC == 4 && GNUC_MINOR >= 5))) || defined(__clang__) || defined(__IAR_SYSTEMS_ICC__)
# define ZSTD_DEPRECATED(message) __attribute__((deprecated(message)))
# elif defined(__GNUC__) && (__GNUC__ >= 3)
# define ZSTD_DEPRECATED(message) __attribute__((deprecated))
@ -106,7 +111,7 @@ extern "C" {
/*------ Version ------*/
#define ZSTD_VERSION_MAJOR 1
#define ZSTD_VERSION_MINOR 5
#define ZSTD_VERSION_RELEASE 6
#define ZSTD_VERSION_RELEASE 7
#define ZSTD_VERSION_NUMBER (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE)
/*! ZSTD_versionNumber() :
@ -144,7 +149,7 @@ ZSTDLIB_API const char* ZSTD_versionString(void);
/***************************************
* Simple API
* Simple Core API
***************************************/
/*! ZSTD_compress() :
* Compresses `src` content as a single zstd compressed frame into already allocated `dst`.
@ -157,68 +162,80 @@ ZSTDLIB_API size_t ZSTD_compress( void* dst, size_t dstCapacity,
int compressionLevel);
/*! ZSTD_decompress() :
* `compressedSize` : must be the _exact_ size of some number of compressed and/or skippable frames.
* `dstCapacity` is an upper bound of originalSize to regenerate.
* If user cannot imply a maximum upper bound, it's better to use streaming mode to decompress data.
* @return : the number of bytes decompressed into `dst` (<= `dstCapacity`),
* or an errorCode if it fails (which can be tested using ZSTD_isError()). */
* `compressedSize` : must be the _exact_ size of some number of compressed and/or skippable frames.
* Multiple compressed frames can be decompressed at once with this method.
* The result will be the concatenation of all decompressed frames, back to back.
* `dstCapacity` is an upper bound of originalSize to regenerate.
* First frame's decompressed size can be extracted using ZSTD_getFrameContentSize().
* If maximum upper bound isn't known, prefer using streaming mode to decompress data.
* @return : the number of bytes decompressed into `dst` (<= `dstCapacity`),
* or an errorCode if it fails (which can be tested using ZSTD_isError()). */
ZSTDLIB_API size_t ZSTD_decompress( void* dst, size_t dstCapacity,
const void* src, size_t compressedSize);
/*====== Decompression helper functions ======*/
/*! ZSTD_getFrameContentSize() : requires v1.3.0+
* `src` should point to the start of a ZSTD encoded frame.
* `srcSize` must be at least as large as the frame header.
* hint : any size >= `ZSTD_frameHeaderSize_max` is large enough.
* @return : - decompressed size of `src` frame content, if known
* - ZSTD_CONTENTSIZE_UNKNOWN if the size cannot be determined
* - ZSTD_CONTENTSIZE_ERROR if an error occurred (e.g. invalid magic number, srcSize too small)
* note 1 : a 0 return value means the frame is valid but "empty".
* note 2 : decompressed size is an optional field, it may not be present, typically in streaming mode.
* When `return==ZSTD_CONTENTSIZE_UNKNOWN`, data to decompress could be any size.
* In which case, it's necessary to use streaming mode to decompress data.
* Optionally, application can rely on some implicit limit,
* as ZSTD_decompress() only needs an upper bound of decompressed size.
* (For example, data could be necessarily cut into blocks <= 16 KB).
* note 3 : decompressed size is always present when compression is completed using single-pass functions,
* such as ZSTD_compress(), ZSTD_compressCCtx() ZSTD_compress_usingDict() or ZSTD_compress_usingCDict().
* note 4 : decompressed size can be very large (64-bits value),
* potentially larger than what local system can handle as a single memory segment.
* In which case, it's necessary to use streaming mode to decompress data.
* note 5 : If source is untrusted, decompressed size could be wrong or intentionally modified.
* Always ensure return value fits within application's authorized limits.
* Each application can set its own limits.
* note 6 : This function replaces ZSTD_getDecompressedSize() */
* `src` should point to the start of a ZSTD encoded frame.
* `srcSize` must be at least as large as the frame header.
* hint : any size >= `ZSTD_frameHeaderSize_max` is large enough.
* @return : - decompressed size of `src` frame content, if known
* - ZSTD_CONTENTSIZE_UNKNOWN if the size cannot be determined
* - ZSTD_CONTENTSIZE_ERROR if an error occurred (e.g. invalid magic number, srcSize too small)
* note 1 : a 0 return value means the frame is valid but "empty".
* When invoking this method on a skippable frame, it will return 0.
* note 2 : decompressed size is an optional field, it may not be present (typically in streaming mode).
* When `return==ZSTD_CONTENTSIZE_UNKNOWN`, data to decompress could be any size.
* In which case, it's necessary to use streaming mode to decompress data.
* Optionally, application can rely on some implicit limit,
* as ZSTD_decompress() only needs an upper bound of decompressed size.
* (For example, data could be necessarily cut into blocks <= 16 KB).
* note 3 : decompressed size is always present when compression is completed using single-pass functions,
* such as ZSTD_compress(), ZSTD_compressCCtx() ZSTD_compress_usingDict() or ZSTD_compress_usingCDict().
* note 4 : decompressed size can be very large (64-bits value),
* potentially larger than what local system can handle as a single memory segment.
* In which case, it's necessary to use streaming mode to decompress data.
* note 5 : If source is untrusted, decompressed size could be wrong or intentionally modified.
* Always ensure return value fits within application's authorized limits.
* Each application can set its own limits.
* note 6 : This function replaces ZSTD_getDecompressedSize() */
#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
ZSTDLIB_API unsigned long long ZSTD_getFrameContentSize(const void *src, size_t srcSize);
/*! ZSTD_getDecompressedSize() :
* NOTE: This function is now obsolete, in favor of ZSTD_getFrameContentSize().
/*! ZSTD_getDecompressedSize() (obsolete):
* This function is now obsolete, in favor of ZSTD_getFrameContentSize().
* Both functions work the same way, but ZSTD_getDecompressedSize() blends
* "empty", "unknown" and "error" results to the same return value (0),
* while ZSTD_getFrameContentSize() gives them separate return values.
* @return : decompressed size of `src` frame content _if known and not empty_, 0 otherwise. */
ZSTD_DEPRECATED("Replaced by ZSTD_getFrameContentSize")
ZSTDLIB_API
unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize);
ZSTDLIB_API unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize);
/*! ZSTD_findFrameCompressedSize() : Requires v1.4.0+
* `src` should point to the start of a ZSTD frame or skippable frame.
* `srcSize` must be >= first frame size
* @return : the compressed size of the first frame starting at `src`,
* suitable to pass as `srcSize` to `ZSTD_decompress` or similar,
* or an error code if input is invalid */
* or an error code if input is invalid
* Note 1: this method is called _find*() because it's not enough to read the header,
* it may have to scan through the frame's content, to reach its end.
* Note 2: this method also works with Skippable Frames. In which case,
* it returns the size of the complete skippable frame,
* which is always equal to its content size + 8 bytes for headers. */
ZSTDLIB_API size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize);
/*====== Helper functions ======*/
/* ZSTD_compressBound() :
/*====== Compression helper functions ======*/
/*! ZSTD_compressBound() :
* maximum compressed size in worst case single-pass scenario.
* When invoking `ZSTD_compress()` or any other one-pass compression function,
* When invoking `ZSTD_compress()`, or any other one-pass compression function,
* it's recommended to provide @dstCapacity >= ZSTD_compressBound(srcSize)
* as it eliminates one potential failure scenario,
* aka not enough room in dst buffer to write the compressed frame.
* Note : ZSTD_compressBound() itself can fail, if @srcSize > ZSTD_MAX_INPUT_SIZE .
* Note : ZSTD_compressBound() itself can fail, if @srcSize >= ZSTD_MAX_INPUT_SIZE .
* In which case, ZSTD_compressBound() will return an error code
* which can be tested using ZSTD_isError().
*
@ -226,21 +243,25 @@ ZSTDLIB_API size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize)
* same as ZSTD_compressBound(), but as a macro.
* It can be used to produce constants, which can be useful for static allocation,
* for example to size a static array on stack.
* Will produce constant value 0 if srcSize too large.
* Will produce constant value 0 if srcSize is too large.
*/
#define ZSTD_MAX_INPUT_SIZE ((sizeof(size_t)==8) ? 0xFF00FF00FF00FF00ULL : 0xFF00FF00U)
#define ZSTD_COMPRESSBOUND(srcSize) (((size_t)(srcSize) >= ZSTD_MAX_INPUT_SIZE) ? 0 : (srcSize) + ((srcSize)>>8) + (((srcSize) < (128<<10)) ? (((128<<10) - (srcSize)) >> 11) /* margin, from 64 to 0 */ : 0)) /* this formula ensures that bound(A) + bound(B) <= bound(A+B) as long as A and B >= 128 KB */
ZSTDLIB_API size_t ZSTD_compressBound(size_t srcSize); /*!< maximum compressed size in worst case single-pass scenario */
/*====== Error helper functions ======*/
/* ZSTD_isError() :
* Most ZSTD_* functions returning a size_t value can be tested for error,
* using ZSTD_isError().
* @return 1 if error, 0 otherwise
*/
ZSTDLIB_API unsigned ZSTD_isError(size_t code); /*!< tells if a `size_t` function result is an error code */
ZSTDLIB_API const char* ZSTD_getErrorName(size_t code); /*!< provides readable string from an error code */
ZSTDLIB_API int ZSTD_minCLevel(void); /*!< minimum negative compression level allowed, requires v1.4.0+ */
ZSTDLIB_API int ZSTD_maxCLevel(void); /*!< maximum compression level available */
ZSTDLIB_API int ZSTD_defaultCLevel(void); /*!< default compression level, specified by ZSTD_CLEVEL_DEFAULT, requires v1.5.0+ */
ZSTDLIB_API unsigned ZSTD_isError(size_t result); /*!< tells if a `size_t` function result is an error code */
ZSTDLIB_API ZSTD_ErrorCode ZSTD_getErrorCode(size_t functionResult); /* convert a result into an error code, which can be compared to error enum list */
ZSTDLIB_API const char* ZSTD_getErrorName(size_t result); /*!< provides readable string from a function result */
ZSTDLIB_API int ZSTD_minCLevel(void); /*!< minimum negative compression level allowed, requires v1.4.0+ */
ZSTDLIB_API int ZSTD_maxCLevel(void); /*!< maximum compression level available */
ZSTDLIB_API int ZSTD_defaultCLevel(void); /*!< default compression level, specified by ZSTD_CLEVEL_DEFAULT, requires v1.5.0+ */
/***************************************
@ -248,17 +269,17 @@ ZSTDLIB_API int ZSTD_defaultCLevel(void); /*!< default compres
***************************************/
/*= Compression context
* When compressing many times,
* it is recommended to allocate a context just once,
* it is recommended to allocate a compression context just once,
* and reuse it for each successive compression operation.
* This will make workload friendlier for system's memory.
* This will make the workload easier for system's memory.
* Note : re-using context is just a speed / resource optimization.
* It doesn't change the compression ratio, which remains identical.
* Note 2 : In multi-threaded environments,
* use one different context per thread for parallel execution.
* Note 2: For parallel execution in multi-threaded environments,
* use one different context per thread .
*/
typedef struct ZSTD_CCtx_s ZSTD_CCtx;
ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx(void);
ZSTDLIB_API size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx); /* accept NULL pointer */
ZSTDLIB_API size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx); /* compatible with NULL pointer */
/*! ZSTD_compressCCtx() :
* Same as ZSTD_compress(), using an explicit ZSTD_CCtx.
@ -266,7 +287,7 @@ ZSTDLIB_API size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx); /* accept NULL pointer *
* this function compresses at the requested compression level,
* __ignoring any other advanced parameter__ .
* If any advanced parameter was set using the advanced API,
* they will all be reset. Only `compressionLevel` remains.
* they will all be reset. Only @compressionLevel remains.
*/
ZSTDLIB_API size_t ZSTD_compressCCtx(ZSTD_CCtx* cctx,
void* dst, size_t dstCapacity,
@ -392,7 +413,7 @@ typedef enum {
* Special: value 0 means "use default strategy". */
ZSTD_c_targetCBlockSize=130, /* v1.5.6+
* Attempts to fit compressed block size into approximatively targetCBlockSize.
* Attempts to fit compressed block size into approximately targetCBlockSize.
* Bound by ZSTD_TARGETCBLOCKSIZE_MIN and ZSTD_TARGETCBLOCKSIZE_MAX.
* Note that it's not a guarantee, just a convergence target (default:0).
* No target when targetCBlockSize == 0.
@ -488,7 +509,8 @@ typedef enum {
* ZSTD_c_stableOutBuffer
* ZSTD_c_blockDelimiters
* ZSTD_c_validateSequences
* ZSTD_c_useBlockSplitter
* ZSTD_c_blockSplitterLevel
* ZSTD_c_splitAfterSequences
* ZSTD_c_useRowMatchFinder
* ZSTD_c_prefetchCDictTables
* ZSTD_c_enableSeqProducerFallback
@ -515,7 +537,8 @@ typedef enum {
ZSTD_c_experimentalParam16=1013,
ZSTD_c_experimentalParam17=1014,
ZSTD_c_experimentalParam18=1015,
ZSTD_c_experimentalParam19=1016
ZSTD_c_experimentalParam19=1016,
ZSTD_c_experimentalParam20=1017
} ZSTD_cParameter;
typedef struct {
@ -855,7 +878,7 @@ ZSTDLIB_API size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output);
*
* A ZSTD_DStream object is required to track streaming operations.
* Use ZSTD_createDStream() and ZSTD_freeDStream() to create/release resources.
* ZSTD_DStream objects can be reused multiple times.
* ZSTD_DStream objects can be re-employed multiple times.
*
* Use ZSTD_initDStream() to start a new decompression operation.
* @return : recommended first input size
@ -865,16 +888,21 @@ ZSTDLIB_API size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output);
* The function will update both `pos` fields.
* If `input.pos < input.size`, some input has not been consumed.
* It's up to the caller to present again remaining data.
*
* The function tries to flush all data decoded immediately, respecting output buffer size.
* If `output.pos < output.size`, decoder has flushed everything it could.
* But if `output.pos == output.size`, there might be some data left within internal buffers.,
*
* However, when `output.pos == output.size`, it's more difficult to know.
* If @return > 0, the frame is not complete, meaning
* either there is still some data left to flush within internal buffers,
* or there is more input to read to complete the frame (or both).
* In which case, call ZSTD_decompressStream() again to flush whatever remains in the buffer.
* Note : with no additional input provided, amount of data flushed is necessarily <= ZSTD_BLOCKSIZE_MAX.
* @return : 0 when a frame is completely decoded and fully flushed,
* or an error code, which can be tested using ZSTD_isError(),
* or any other value > 0, which means there is still some decoding or flushing to do to complete current frame :
* the return value is a suggested next input size (just a hint for better latency)
* that will never request more than the remaining frame size.
* that will never request more than the remaining content of the compressed frame.
* *******************************************************************************/
typedef ZSTD_DCtx ZSTD_DStream; /**< DCtx and DStream are now effectively same object (>= v1.3.0) */
@ -901,9 +929,10 @@ ZSTDLIB_API size_t ZSTD_initDStream(ZSTD_DStream* zds);
* Function will update both input and output `pos` fields exposing current state via these fields:
* - `input.pos < input.size`, some input remaining and caller should provide remaining input
* on the next call.
* - `output.pos < output.size`, decoder finished and flushed all remaining buffers.
* - `output.pos == output.size`, potentially uncflushed data present in the internal buffers,
* call ZSTD_decompressStream() again to flush remaining data to output.
* - `output.pos < output.size`, decoder flushed internal output buffer.
* - `output.pos == output.size`, unflushed data potentially present in the internal buffers,
* check ZSTD_decompressStream() @return value,
* if > 0, invoke it again to flush remaining data to output.
* Note : with no additional input, amount of data flushed <= ZSTD_BLOCKSIZE_MAX.
*
* @return : 0 when a frame is completely decoded and fully flushed,
@ -1181,6 +1210,10 @@ ZSTDLIB_API size_t ZSTD_sizeof_DStream(const ZSTD_DStream* zds);
ZSTDLIB_API size_t ZSTD_sizeof_CDict(const ZSTD_CDict* cdict);
ZSTDLIB_API size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
#if defined (__cplusplus)
}
#endif
#endif /* ZSTD_H_235446 */
@ -1196,6 +1229,10 @@ ZSTDLIB_API size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
#if defined(ZSTD_STATIC_LINKING_ONLY) && !defined(ZSTD_H_ZSTD_STATIC_LINKING_ONLY)
#define ZSTD_H_ZSTD_STATIC_LINKING_ONLY
#if defined (__cplusplus)
extern "C" {
#endif
/* This can be overridden externally to hide static symbols. */
#ifndef ZSTDLIB_STATIC_API
# if defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1)
@ -1307,7 +1344,7 @@ typedef struct {
*
* Note: This field is optional. ZSTD_generateSequences() will calculate the value of
* 'rep', but repeat offsets do not necessarily need to be calculated from an external
* sequence provider's perspective. For example, ZSTD_compressSequences() does not
* sequence provider perspective. For example, ZSTD_compressSequences() does not
* use this 'rep' field at all (as of now).
*/
} ZSTD_Sequence;
@ -1412,14 +1449,15 @@ typedef enum {
} ZSTD_literalCompressionMode_e;
typedef enum {
/* Note: This enum controls features which are conditionally beneficial. Zstd typically will make a final
* decision on whether or not to enable the feature (ZSTD_ps_auto), but setting the switch to ZSTD_ps_enable
* or ZSTD_ps_disable allow for a force enable/disable the feature.
/* Note: This enum controls features which are conditionally beneficial.
* Zstd can take a decision on whether or not to enable the feature (ZSTD_ps_auto),
* but setting the switch to ZSTD_ps_enable or ZSTD_ps_disable force enable/disable the feature.
*/
ZSTD_ps_auto = 0, /* Let the library automatically determine whether the feature shall be enabled */
ZSTD_ps_enable = 1, /* Force-enable the feature */
ZSTD_ps_disable = 2 /* Do not use the feature */
} ZSTD_paramSwitch_e;
} ZSTD_ParamSwitch_e;
#define ZSTD_paramSwitch_e ZSTD_ParamSwitch_e /* old name */
/***************************************
* Frame header and size functions
@ -1464,34 +1502,36 @@ ZSTDLIB_STATIC_API unsigned long long ZSTD_findDecompressedSize(const void* src,
ZSTDLIB_STATIC_API unsigned long long ZSTD_decompressBound(const void* src, size_t srcSize);
/*! ZSTD_frameHeaderSize() :
* srcSize must be >= ZSTD_FRAMEHEADERSIZE_PREFIX.
* srcSize must be large enough, aka >= ZSTD_FRAMEHEADERSIZE_PREFIX.
* @return : size of the Frame Header,
* or an error code (if srcSize is too small) */
ZSTDLIB_STATIC_API size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize);
typedef enum { ZSTD_frame, ZSTD_skippableFrame } ZSTD_frameType_e;
typedef enum { ZSTD_frame, ZSTD_skippableFrame } ZSTD_FrameType_e;
#define ZSTD_frameType_e ZSTD_FrameType_e /* old name */
typedef struct {
unsigned long long frameContentSize; /* if == ZSTD_CONTENTSIZE_UNKNOWN, it means this field is not available. 0 means "empty" */
unsigned long long windowSize; /* can be very large, up to <= frameContentSize */
unsigned blockSizeMax;
ZSTD_frameType_e frameType; /* if == ZSTD_skippableFrame, frameContentSize is the size of skippable content */
ZSTD_FrameType_e frameType; /* if == ZSTD_skippableFrame, frameContentSize is the size of skippable content */
unsigned headerSize;
unsigned dictID;
unsigned dictID; /* for ZSTD_skippableFrame, contains the skippable magic variant [0-15] */
unsigned checksumFlag;
unsigned _reserved1;
unsigned _reserved2;
} ZSTD_frameHeader;
} ZSTD_FrameHeader;
#define ZSTD_frameHeader ZSTD_FrameHeader /* old name */
/*! ZSTD_getFrameHeader() :
* decode Frame Header, or requires larger `srcSize`.
* @return : 0, `zfhPtr` is correctly filled,
* >0, `srcSize` is too small, value is wanted `srcSize` amount,
* decode Frame Header into `zfhPtr`, or requires larger `srcSize`.
* @return : 0 => header is complete, `zfhPtr` is correctly filled,
* >0 => `srcSize` is too small, @return value is the wanted `srcSize` amount, `zfhPtr` is not filled,
* or an error code, which can be tested using ZSTD_isError() */
ZSTDLIB_STATIC_API size_t ZSTD_getFrameHeader(ZSTD_frameHeader* zfhPtr, const void* src, size_t srcSize); /**< doesn't consume input */
ZSTDLIB_STATIC_API size_t ZSTD_getFrameHeader(ZSTD_FrameHeader* zfhPtr, const void* src, size_t srcSize);
/*! ZSTD_getFrameHeader_advanced() :
* same as ZSTD_getFrameHeader(),
* with added capability to select a format (like ZSTD_f_zstd1_magicless) */
ZSTDLIB_STATIC_API size_t ZSTD_getFrameHeader_advanced(ZSTD_frameHeader* zfhPtr, const void* src, size_t srcSize, ZSTD_format_e format);
ZSTDLIB_STATIC_API size_t ZSTD_getFrameHeader_advanced(ZSTD_FrameHeader* zfhPtr, const void* src, size_t srcSize, ZSTD_format_e format);
/*! ZSTD_decompressionMargin() :
* Zstd supports in-place decompression, where the input and output buffers overlap.
@ -1539,9 +1579,10 @@ ZSTDLIB_STATIC_API size_t ZSTD_decompressionMargin(const void* src, size_t srcSi
))
typedef enum {
ZSTD_sf_noBlockDelimiters = 0, /* Representation of ZSTD_Sequence has no block delimiters, sequences only */
ZSTD_sf_explicitBlockDelimiters = 1 /* Representation of ZSTD_Sequence contains explicit block delimiters */
} ZSTD_sequenceFormat_e;
ZSTD_sf_noBlockDelimiters = 0, /* ZSTD_Sequence[] has no block delimiters, just sequences */
ZSTD_sf_explicitBlockDelimiters = 1 /* ZSTD_Sequence[] contains explicit block delimiters */
} ZSTD_SequenceFormat_e;
#define ZSTD_sequenceFormat_e ZSTD_SequenceFormat_e /* old name */
/*! ZSTD_sequenceBound() :
* `srcSize` : size of the input buffer
@ -1565,7 +1606,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_sequenceBound(size_t srcSize);
* @param zc The compression context to be used for ZSTD_compress2(). Set any
* compression parameters you need on this context.
* @param outSeqs The output sequences buffer of size @p outSeqsSize
* @param outSeqsSize The size of the output sequences buffer.
* @param outSeqsCapacity The size of the output sequences buffer.
* ZSTD_sequenceBound(srcSize) is an upper bound on the number
* of sequences that can be generated.
* @param src The source buffer to generate sequences from of size @p srcSize.
@ -1583,7 +1624,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_sequenceBound(size_t srcSize);
ZSTD_DEPRECATED("For debugging only, will be replaced by ZSTD_extractSequences()")
ZSTDLIB_STATIC_API size_t
ZSTD_generateSequences(ZSTD_CCtx* zc,
ZSTD_Sequence* outSeqs, size_t outSeqsSize,
ZSTD_Sequence* outSeqs, size_t outSeqsCapacity,
const void* src, size_t srcSize);
/*! ZSTD_mergeBlockDelimiters() :
@ -1603,7 +1644,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_mergeBlockDelimiters(ZSTD_Sequence* sequences, si
* Compress an array of ZSTD_Sequence, associated with @src buffer, into dst.
* @src contains the entire input (not just the literals).
* If @srcSize > sum(sequence.length), the remaining bytes are considered all literals
* If a dictionary is included, then the cctx should reference the dict. (see: ZSTD_CCtx_refCDict(), ZSTD_CCtx_loadDictionary(), etc.)
* If a dictionary is included, then the cctx should reference the dict (see: ZSTD_CCtx_refCDict(), ZSTD_CCtx_loadDictionary(), etc.).
* The entire source is compressed into a single frame.
*
* The compression behavior changes based on cctx params. In particular:
@ -1612,11 +1653,17 @@ ZSTDLIB_STATIC_API size_t ZSTD_mergeBlockDelimiters(ZSTD_Sequence* sequences, si
* the block size derived from the cctx, and sequences may be split. This is the default setting.
*
* If ZSTD_c_blockDelimiters == ZSTD_sf_explicitBlockDelimiters, the array of ZSTD_Sequence is expected to contain
* block delimiters (defined in ZSTD_Sequence). Behavior is undefined if no block delimiters are provided.
* valid block delimiters (defined in ZSTD_Sequence). Behavior is undefined if no block delimiters are provided.
*
* If ZSTD_c_validateSequences == 0, this function will blindly accept the sequences provided. Invalid sequences cause undefined
* behavior. If ZSTD_c_validateSequences == 1, then if sequence is invalid (see doc/zstd_compression_format.md for
* specifics regarding offset/matchlength requirements) then the function will bail out and return an error.
* When ZSTD_c_blockDelimiters == ZSTD_sf_explicitBlockDelimiters, it's possible to decide generating repcodes
* using the advanced parameter ZSTD_c_repcodeResolution. Repcodes will improve compression ratio, though the benefit
* can vary greatly depending on Sequences. On the other hand, repcode resolution is an expensive operation.
* By default, it's disabled at low (<10) compression levels, and enabled above the threshold (>=10).
* ZSTD_c_repcodeResolution makes it possible to directly manage this processing in either direction.
*
* If ZSTD_c_validateSequences == 0, this function blindly accepts the Sequences provided. Invalid Sequences cause undefined
* behavior. If ZSTD_c_validateSequences == 1, then the function will detect invalid Sequences (see doc/zstd_compression_format.md for
* specifics regarding offset/matchlength requirements) and then bail out and return an error.
*
* In addition to the two adjustable experimental params, there are other important cctx params.
* - ZSTD_c_minMatch MUST be set as less than or equal to the smallest match generated by the match finder. It has a minimum value of ZSTD_MINMATCH_MIN.
@ -1624,15 +1671,42 @@ ZSTDLIB_STATIC_API size_t ZSTD_mergeBlockDelimiters(ZSTD_Sequence* sequences, si
* - ZSTD_c_windowLog affects offset validation: this function will return an error at higher debug levels if a provided offset
* is larger than what the spec allows for a given window log and dictionary (if present). See: doc/zstd_compression_format.md
*
* Note: Repcodes are, as of now, always re-calculated within this function, so ZSTD_Sequence::rep is unused.
* Note 2: Once we integrate ability to ingest repcodes, the explicit block delims mode must respect those repcodes exactly,
* and cannot emit an RLE block that disagrees with the repcode history
* Note: Repcodes are, as of now, always re-calculated within this function, ZSTD_Sequence.rep is effectively unused.
* Dev Note: Once ability to ingest repcodes become available, the explicit block delims mode must respect those repcodes exactly,
* and cannot emit an RLE block that disagrees with the repcode history.
* @return : final compressed size, or a ZSTD error code.
*/
ZSTDLIB_STATIC_API size_t
ZSTD_compressSequences( ZSTD_CCtx* cctx, void* dst, size_t dstSize,
const ZSTD_Sequence* inSeqs, size_t inSeqsSize,
const void* src, size_t srcSize);
ZSTD_compressSequences(ZSTD_CCtx* cctx,
void* dst, size_t dstCapacity,
const ZSTD_Sequence* inSeqs, size_t inSeqsSize,
const void* src, size_t srcSize);
/*! ZSTD_compressSequencesAndLiterals() :
* This is a variant of ZSTD_compressSequences() which,
* instead of receiving (src,srcSize) as input parameter, receives (literals,litSize),
* aka all the literals, already extracted and laid out into a single continuous buffer.
* This can be useful if the process generating the sequences also happens to generate the buffer of literals,
* thus skipping an extraction + caching stage.
* It's a speed optimization, useful when the right conditions are met,
* but it also features the following limitations:
* - Only supports explicit delimiter mode
* - Currently does not support Sequences validation (so input Sequences are trusted)
* - Not compatible with frame checksum, which must be disabled
* - If any block is incompressible, will fail and return an error
* - @litSize must be == sum of all @.litLength fields in @inSeqs. Any discrepancy will generate an error.
* - @litBufCapacity is the size of the underlying buffer into which literals are written, starting at address @literals.
* @litBufCapacity must be at least 8 bytes larger than @litSize.
* - @decompressedSize must be correct, and correspond to the sum of all Sequences. Any discrepancy will generate an error.
* @return : final compressed size, or a ZSTD error code.
*/
ZSTDLIB_STATIC_API size_t
ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
void* dst, size_t dstCapacity,
const ZSTD_Sequence* inSeqs, size_t nbSequences,
const void* literals, size_t litSize, size_t litBufCapacity,
size_t decompressedSize);
/*! ZSTD_writeSkippableFrame() :
@ -1640,8 +1714,8 @@ ZSTD_compressSequences( ZSTD_CCtx* cctx, void* dst, size_t dstSize,
*
* Skippable frames begin with a 4-byte magic number. There are 16 possible choices of magic number,
* ranging from ZSTD_MAGIC_SKIPPABLE_START to ZSTD_MAGIC_SKIPPABLE_START+15.
* As such, the parameter magicVariant controls the exact skippable frame magic number variant used, so
* the magic number used will be ZSTD_MAGIC_SKIPPABLE_START + magicVariant.
* As such, the parameter magicVariant controls the exact skippable frame magic number variant used,
* so the magic number used will be ZSTD_MAGIC_SKIPPABLE_START + magicVariant.
*
* Returns an error if destination buffer is not large enough, if the source size is not representable
* with a 4-byte unsigned int, or if the parameter magicVariant is greater than 15 (and therefore invalid).
@ -1649,26 +1723,28 @@ ZSTD_compressSequences( ZSTD_CCtx* cctx, void* dst, size_t dstSize,
* @return : number of bytes written or a ZSTD error.
*/
ZSTDLIB_STATIC_API size_t ZSTD_writeSkippableFrame(void* dst, size_t dstCapacity,
const void* src, size_t srcSize, unsigned magicVariant);
const void* src, size_t srcSize,
unsigned magicVariant);
/*! ZSTD_readSkippableFrame() :
* Retrieves a zstd skippable frame containing data given by src, and writes it to dst buffer.
* Retrieves the content of a zstd skippable frame starting at @src, and writes it to @dst buffer.
*
* The parameter magicVariant will receive the magicVariant that was supplied when the frame was written,
* i.e. magicNumber - ZSTD_MAGIC_SKIPPABLE_START. This can be NULL if the caller is not interested
* in the magicVariant.
* The parameter @magicVariant will receive the magicVariant that was supplied when the frame was written,
* i.e. magicNumber - ZSTD_MAGIC_SKIPPABLE_START.
* This can be NULL if the caller is not interested in the magicVariant.
*
* Returns an error if destination buffer is not large enough, or if the frame is not skippable.
*
* @return : number of bytes written or a ZSTD error.
*/
ZSTDLIB_API size_t ZSTD_readSkippableFrame(void* dst, size_t dstCapacity, unsigned* magicVariant,
const void* src, size_t srcSize);
ZSTDLIB_STATIC_API size_t ZSTD_readSkippableFrame(void* dst, size_t dstCapacity,
unsigned* magicVariant,
const void* src, size_t srcSize);
/*! ZSTD_isSkippableFrame() :
* Tells if the content of `buffer` starts with a valid Frame Identifier for a skippable frame.
*/
ZSTDLIB_API unsigned ZSTD_isSkippableFrame(const void* buffer, size_t size);
ZSTDLIB_STATIC_API unsigned ZSTD_isSkippableFrame(const void* buffer, size_t size);
@ -1796,7 +1872,15 @@ static
#ifdef __GNUC__
__attribute__((__unused__))
#endif
#if defined(__clang__) && __clang_major__ >= 5
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif
ZSTD_customMem const ZSTD_defaultCMem = { NULL, NULL, NULL }; /**< this constant defers to stdlib's functions */
#if defined(__clang__) && __clang_major__ >= 5
#pragma clang diagnostic pop
#endif
ZSTDLIB_STATIC_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem);
ZSTDLIB_STATIC_API ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem);
@ -1976,7 +2060,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
* See the comments on that enum for an explanation of the feature. */
#define ZSTD_c_forceAttachDict ZSTD_c_experimentalParam4
/* Controlled with ZSTD_paramSwitch_e enum.
/* Controlled with ZSTD_ParamSwitch_e enum.
* Default is ZSTD_ps_auto.
* Set to ZSTD_ps_disable to never compress literals.
* Set to ZSTD_ps_enable to always compress literals. (Note: uncompressed literals
@ -2117,22 +2201,46 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
/* ZSTD_c_validateSequences
* Default is 0 == disabled. Set to 1 to enable sequence validation.
*
* For use with sequence compression API: ZSTD_compressSequences().
* Designates whether or not we validate sequences provided to ZSTD_compressSequences()
* For use with sequence compression API: ZSTD_compressSequences*().
* Designates whether or not provided sequences are validated within ZSTD_compressSequences*()
* during function execution.
*
* Without validation, providing a sequence that does not conform to the zstd spec will cause
* undefined behavior, and may produce a corrupted block.
* When Sequence validation is disabled (default), Sequences are compressed as-is,
* so they must correct, otherwise it would result in a corruption error.
*
* With validation enabled, if sequence is invalid (see doc/zstd_compression_format.md for
* Sequence validation adds some protection, by ensuring that all values respect boundary conditions.
* If a Sequence is detected invalid (see doc/zstd_compression_format.md for
* specifics regarding offset/matchlength requirements) then the function will bail out and
* return an error.
*
*/
#define ZSTD_c_validateSequences ZSTD_c_experimentalParam12
/* ZSTD_c_useBlockSplitter
* Controlled with ZSTD_paramSwitch_e enum.
/* ZSTD_c_blockSplitterLevel
* note: this parameter only influences the first splitter stage,
* which is active before producing the sequences.
* ZSTD_c_splitAfterSequences controls the next splitter stage,
* which is active after sequence production.
* Note that both can be combined.
* Allowed values are between 0 and ZSTD_BLOCKSPLITTER_LEVEL_MAX included.
* 0 means "auto", which will select a value depending on current ZSTD_c_strategy.
* 1 means no splitting.
* Then, values from 2 to 6 are sorted in increasing cpu load order.
*
* Note that currently the first block is never split,
* to ensure expansion guarantees in presence of incompressible data.
*/
#define ZSTD_BLOCKSPLITTER_LEVEL_MAX 6
#define ZSTD_c_blockSplitterLevel ZSTD_c_experimentalParam20
/* ZSTD_c_splitAfterSequences
* This is a stronger splitter algorithm,
* based on actual sequences previously produced by the selected parser.
* It's also slower, and as a consequence, mostly used for high compression levels.
* While the post-splitter does overlap with the pre-splitter,
* both can nonetheless be combined,
* notably with ZSTD_c_blockSplitterLevel at ZSTD_BLOCKSPLITTER_LEVEL_MAX,
* resulting in higher compression ratio than just one of them.
*
* Default is ZSTD_ps_auto.
* Set to ZSTD_ps_disable to never use block splitter.
* Set to ZSTD_ps_enable to always use block splitter.
@ -2140,10 +2248,10 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
* By default, in ZSTD_ps_auto, the library will decide at runtime whether to use
* block splitting based on the compression parameters.
*/
#define ZSTD_c_useBlockSplitter ZSTD_c_experimentalParam13
#define ZSTD_c_splitAfterSequences ZSTD_c_experimentalParam13
/* ZSTD_c_useRowMatchFinder
* Controlled with ZSTD_paramSwitch_e enum.
* Controlled with ZSTD_ParamSwitch_e enum.
* Default is ZSTD_ps_auto.
* Set to ZSTD_ps_disable to never use row-based matchfinder.
* Set to ZSTD_ps_enable to force usage of row-based matchfinder.
@ -2175,7 +2283,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
#define ZSTD_c_deterministicRefPrefix ZSTD_c_experimentalParam15
/* ZSTD_c_prefetchCDictTables
* Controlled with ZSTD_paramSwitch_e enum. Default is ZSTD_ps_auto.
* Controlled with ZSTD_ParamSwitch_e enum. Default is ZSTD_ps_auto.
*
* In some situations, zstd uses CDict tables in-place rather than copying them
* into the working context. (See docs on ZSTD_dictAttachPref_e above for details).
@ -2219,19 +2327,21 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
* that overrides the default ZSTD_BLOCKSIZE_MAX. It cannot be used to set upper
* bounds greater than ZSTD_BLOCKSIZE_MAX or bounds lower than 1KB (will make
* compressBound() inaccurate). Only currently meant to be used for testing.
*
*/
#define ZSTD_c_maxBlockSize ZSTD_c_experimentalParam18
/* ZSTD_c_searchForExternalRepcodes
* This parameter affects how zstd parses external sequences, such as sequences
* provided through the compressSequences() API or from an external block-level
* sequence producer.
/* ZSTD_c_repcodeResolution
* This parameter only has an effect if ZSTD_c_blockDelimiters is
* set to ZSTD_sf_explicitBlockDelimiters (may change in the future).
*
* If set to ZSTD_ps_enable, the library will check for repeated offsets in
* This parameter affects how zstd parses external sequences,
* provided via the ZSTD_compressSequences*() API
* or from an external block-level sequence producer.
*
* If set to ZSTD_ps_enable, the library will check for repeated offsets within
* external sequences, even if those repcodes are not explicitly indicated in
* the "rep" field. Note that this is the only way to exploit repcode matches
* while using compressSequences() or an external sequence producer, since zstd
* while using compressSequences*() or an external sequence producer, since zstd
* currently ignores the "rep" field of external sequences.
*
* If set to ZSTD_ps_disable, the library will not exploit repeated offsets in
@ -2240,12 +2350,11 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
* compression ratio.
*
* The default value is ZSTD_ps_auto, for which the library will enable/disable
* based on compression level.
*
* Note: for now, this param only has an effect if ZSTD_c_blockDelimiters is
* set to ZSTD_sf_explicitBlockDelimiters. That may change in the future.
* based on compression level (currently: level<10 disables, level>=10 enables).
*/
#define ZSTD_c_searchForExternalRepcodes ZSTD_c_experimentalParam19
#define ZSTD_c_repcodeResolution ZSTD_c_experimentalParam19
#define ZSTD_c_searchForExternalRepcodes ZSTD_c_experimentalParam19 /* older name */
/*! ZSTD_CCtx_getParameter() :
* Get the requested compression parameter value, selected by enum ZSTD_cParameter,
@ -2952,7 +3061,7 @@ size_t ZSTD_compressBegin_usingCDict_advanced(ZSTD_CCtx* const cctx, const ZSTD_
>0 : `srcSize` is too small, please provide at least result bytes on next attempt.
errorCode, which can be tested using ZSTD_isError().
It fills a ZSTD_frameHeader structure with important information to correctly decode the frame,
It fills a ZSTD_FrameHeader structure with important information to correctly decode the frame,
such as the dictionary ID, content size, or maximum back-reference distance (`windowSize`).
Note that these values could be wrong, either because of data corruption, or because a 3rd party deliberately spoofs false information.
As a consequence, check that values remain within valid application range.
@ -3082,8 +3191,8 @@ ZSTDLIB_STATIC_API size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, void* dst, size_
ZSTD_DEPRECATED("The block API is deprecated in favor of the normal compression API. See docs.")
ZSTDLIB_STATIC_API size_t ZSTD_insertBlock (ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize); /**< insert uncompressed block into `dctx` history. Useful for multi-blocks decompression. */
#endif /* ZSTD_H_ZSTD_STATIC_LINKING_ONLY */
#if defined (__cplusplus)
}
#endif
#endif /* ZSTD_H_ZSTD_STATIC_LINKING_ONLY */