/** @file * IPRT - Compression. */ /* * Copyright (C) 2006-2017 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef ___iprt_zip_h #define ___iprt_zip_h #include #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_zip RTZip - Compression * @ingroup grp_rt * @{ */ /** * Callback function for consuming compressed data during compression. * * @returns iprt status code. * @param pvUser User argument. * @param pvBuf Compressed data. * @param cbBuf Size of the compressed data. */ typedef DECLCALLBACK(int) FNRTZIPOUT(void *pvUser, const void *pvBuf, size_t cbBuf); /** Pointer to FNRTZIPOUT() function. */ typedef FNRTZIPOUT *PFNRTZIPOUT; /** * Callback function for supplying compressed data during decompression. * * @returns iprt status code. * @param pvUser User argument. * @param pvBuf Where to store the compressed data. * @param cbBuf Size of the buffer. * @param pcbBuf Number of bytes actually stored in the buffer. */ typedef DECLCALLBACK(int) FNRTZIPIN(void *pvUser, void *pvBuf, size_t cbBuf, size_t *pcbBuf); /** Pointer to FNRTZIPIN() function. */ typedef FNRTZIPIN *PFNRTZIPIN; /** * Compression type. * (Be careful with these they are stored in files!) */ typedef enum RTZIPTYPE { /** Invalid. */ RTZIPTYPE_INVALID = 0, /** Choose best fitting one. */ RTZIPTYPE_AUTO, /** Store the data. */ RTZIPTYPE_STORE, /** Zlib compression the data. */ RTZIPTYPE_ZLIB, /** BZlib compress. */ RTZIPTYPE_BZLIB, /** libLZF compress. */ RTZIPTYPE_LZF, /** Lempel-Ziv-Jeff-Bonwick compression. */ RTZIPTYPE_LZJB, /** Lempel-Ziv-Oberhumer compression. */ RTZIPTYPE_LZO, /* Zlib compression the data without zlib header. */ RTZIPTYPE_ZLIB_NO_HEADER, /** End of valid the valid compression types. */ RTZIPTYPE_END } RTZIPTYPE; /** * Compression level. */ typedef enum RTZIPLEVEL { /** Store, don't compress. */ RTZIPLEVEL_STORE = 0, /** Fast compression. */ RTZIPLEVEL_FAST, /** Default compression. */ RTZIPLEVEL_DEFAULT, /** Maximal compression. */ RTZIPLEVEL_MAX } RTZIPLEVEL; /** * Create a stream compressor instance. * * @returns iprt status code. * @param ppZip Where to store the instance handle. * @param pvUser User argument which will be passed on to pfnOut and pfnIn. * @param pfnOut Callback for consuming output of compression. * @param enmType Type of compressor to create. * @param enmLevel Compression level. */ RTDECL(int) RTZipCompCreate(PRTZIPCOMP *ppZip, void *pvUser, PFNRTZIPOUT pfnOut, RTZIPTYPE enmType, RTZIPLEVEL enmLevel); /** * Compresses a chunk of memory. * * @returns iprt status code. * @param pZip The compressor instance. * @param pvBuf Pointer to buffer containing the bits to compress. * @param cbBuf Number of bytes to compress. */ RTDECL(int) RTZipCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf); /** * Finishes the compression. * This will flush all data and terminate the compression data stream. * * @returns iprt status code. * @param pZip The stream compressor instance. */ RTDECL(int) RTZipCompFinish(PRTZIPCOMP pZip); /** * Destroys the stream compressor instance. * * @returns iprt status code. * @param pZip The compressor instance. */ RTDECL(int) RTZipCompDestroy(PRTZIPCOMP pZip); /** * Create a stream decompressor instance. * * @returns iprt status code. * @param ppZip Where to store the instance handle. * @param pvUser User argument which will be passed on to pfnOut and pfnIn. * @param pfnIn Callback for producing input for decompression. */ RTDECL(int) RTZipDecompCreate(PRTZIPDECOMP *ppZip, void *pvUser, PFNRTZIPIN pfnIn); /** * Decompresses a chunk of memory. * * @returns iprt status code. * @param pZip The stream decompressor instance. * @param pvBuf Where to store the decompressed data. * @param cbBuf Number of bytes to produce. If pcbWritten is set * any number of bytes up to cbBuf might be returned. * @param pcbWritten Number of bytes actually written to the buffer. If NULL * cbBuf number of bytes must be written. */ RTDECL(int) RTZipDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten); /** * Destroys the stream decompressor instance. * * @returns iprt status code. * @param pZip The decompressor instance. */ RTDECL(int) RTZipDecompDestroy(PRTZIPDECOMP pZip); /** * Compress a chunk of memory into a block. * * @returns IPRT status code. * * @param enmType The compression type. * @param enmLevel The compression level. * @param fFlags Flags reserved for future extensions, MBZ. * @param pvSrc Pointer to the input block. * @param cbSrc Size of the input block. * @param pvDst Pointer to the output buffer. * @param cbDst The size of the output buffer. * @param pcbDstActual Where to return the compressed size. */ RTDECL(int) RTZipBlockCompress(RTZIPTYPE enmType, RTZIPLEVEL enmLevel, uint32_t fFlags, void const *pvSrc, size_t cbSrc, void *pvDst, size_t cbDst, size_t *pcbDstActual) RT_NO_THROW_PROTO; /** * Decompress a block. * * @returns IPRT status code. * * @param enmType The compression type. * @param fFlags Flags reserved for future extensions, MBZ. * @param pvSrc Pointer to the input block. * @param cbSrc Size of the input block. * @param pcbSrcActual Where to return the compressed size. * @param pvDst Pointer to the output buffer. * @param cbDst The size of the output buffer. * @param pcbDstActual Where to return the decompressed size. */ RTDECL(int) RTZipBlockDecompress(RTZIPTYPE enmType, uint32_t fFlags, void const *pvSrc, size_t cbSrc, size_t *pcbSrcActual, void *pvDst, size_t cbDst, size_t *pcbDstActual) RT_NO_THROW_PROTO; /** * Opens a gzip decompression I/O stream. * * @returns IPRT status code. * * @param hVfsIosIn The compressed input stream (must be readable). * The reference is not consumed, instead another * one is retained. * @param fFlags Flags, MBZ. * @param phVfsIosGunzip Where to return the handle to the gunzipped I/O * stream (read). */ RTDECL(int) RTZipGzipDecompressIoStream(RTVFSIOSTREAM hVfsIosIn, uint32_t fFlags, PRTVFSIOSTREAM phVfsIosGunzip); /** @name RTZipGzipDecompressIoStream flags. * @{ */ /** Allow the smaller ZLIB header as well as the regular GZIP header. */ #define RTZIPGZIPDECOMP_F_ALLOW_ZLIB_HDR RT_BIT(0) /** @} */ /** * Opens a gzip decompression I/O stream. * * @returns IPRT status code. * * @param hVfsIosDst The compressed output stream (must be writable). * The reference is not consumed, instead another * one is retained. * @param fFlags Flags, MBZ. * @param uLevel The gzip compression level, 1 thru 9. * @param phVfsIosGzip Where to return the gzip input I/O stream handle * (you write to this). */ RTDECL(int) RTZipGzipCompressIoStream(RTVFSIOSTREAM hVfsIosDst, uint32_t fFlags, uint8_t uLevel, PRTVFSIOSTREAM phVfsIosGzip); /** * A mini GZIP program. * * @returns Program exit code. * * @param cArgs The number of arguments. * @param papszArgs The argument vector. (Note that this may be * reordered, so the memory must be writable.) */ RTDECL(RTEXITCODE) RTZipGzipCmd(unsigned cArgs, char **papszArgs); /** * Opens a TAR filesystem stream. * * This is used to extract, list or check a TAR archive. * * @returns IPRT status code. * * @param hVfsIosIn The input stream. The reference is not * consumed, instead another one is retained. * @param fFlags Flags, MBZ. * @param phVfsFss Where to return the handle to the TAR * filesystem stream. */ RTDECL(int) RTZipTarFsStreamFromIoStream(RTVFSIOSTREAM hVfsIosIn, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss); /** TAR format type. */ typedef enum RTZIPTARFORMAT { /** Customary invalid zero value. */ RTZIPTARFORMAT_INVALID = 0, /** Default format (GNU). */ RTZIPTARFORMAT_DEFAULT, /** The GNU format. */ RTZIPTARFORMAT_GNU, /** USTAR format from POSIX.1-1988. */ RTZIPTARFORMAT_USTAR, /** PAX format from POSIX.1-2001. */ RTZIPTARFORMAT_PAX, /** End of valid formats. */ RTZIPTARFORMAT_END, /** Make sure the type is at least 32 bits wide. */ RTZIPTARFORMAT_32BIT_HACK = 0x7fffffff } RTZIPTARFORMAT; /** * Opens a TAR filesystem stream for the purpose of create a new TAR archive. * * @returns IPRT status code. * * @param hVfsIosOut The output stream, i.e. where the tar stuff is * written. The reference is not consumed, instead * another one is retained. * @param enmFormat The desired output format. * @param fFlags RTZIPTAR_C_XXX. * @param phVfsFss Where to return the handle to the TAR * filesystem stream. */ RTDECL(int) RTZipTarFsStreamToIoStream(RTVFSIOSTREAM hVfsIosOut, RTZIPTARFORMAT enmFormat, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss); /** @name RTZIPTAR_C_XXX - TAR creation flags (RTZipTarFsStreamToIoStream). * @{ */ /** Check for sparse files. * @note Only supported when adding file objects. The files will be read * twice. */ #define RTZIPTAR_C_SPARSE RT_BIT_32(0) /** Valid bits. */ #define RTZIPTAR_C_VALID_MASK UINT32_C(0x00000001) /** @} */ /** * Set the owner to store the archive entries with. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param uid The UID value to set. Passing NIL_RTUID makes * it use the value found in RTFSOBJINFO. * @param pszOwner The owner name to store. Passing NULL makes it * use the value found in RTFSOBJINFO. */ RTDECL(int) RTZipTarFsStreamSetOwner(RTVFSFSSTREAM hVfsFss, RTUID uid, const char *pszOwner); /** * Set the group to store the archive entries with. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param gid The GID value to set. Passing NIL_RTUID makes * it use the value found in RTFSOBJINFO. * @param pszGroup The group name to store. Passing NULL makes it * use the value found in RTFSOBJINFO. */ RTDECL(int) RTZipTarFsStreamSetGroup(RTVFSFSSTREAM hVfsFss, RTGID gid, const char *pszGroup); /** * Set path prefix to store the archive entries with. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param pszPrefix The path prefix to join the names with. Pass * NULL for no prefix. */ RTDECL(int) RTZipTarFsStreamSetPrefix(RTVFSFSSTREAM hVfsFss, const char *pszPrefix); /** * Set the AND and OR masks to apply to file (non-dir) modes in the archive. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param fAndMode The bits to keep * @param fOrMode The bits to set. */ RTDECL(int) RTZipTarFsStreamSetFileMode(RTVFSFSSTREAM hVfsFss, RTFMODE fAndMode, RTFMODE fOrMode); /** * Set the AND and OR masks to apply to directory modes in the archive. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param fAndMode The bits to keep * @param fOrMode The bits to set. */ RTDECL(int) RTZipTarFsStreamSetDirMode(RTVFSFSSTREAM hVfsFss, RTFMODE fAndMode, RTFMODE fOrMode); /** * Set the modification time to store the archive entires with. * * @returns IPRT status code. * @param hVfsFss The handle to a TAR creator. * @param pModificationTime The modification time to use. Pass NULL to use * the value found in RTFSOBJINFO. */ RTDECL(int) RTZipTarFsStreamSetMTime(RTVFSFSSTREAM hVfsFss, PCRTTIMESPEC pModificationTime); /** * A mini TAR program. * * @returns Program exit code. * * @param cArgs The number of arguments. * @param papszArgs The argument vector. (Note that this may be * reordered, so the memory must be writable.) */ RTDECL(RTEXITCODE) RTZipTarCmd(unsigned cArgs, char **papszArgs); /** * Opens a ZIP filesystem stream. * * This is used to extract, list or check a ZIP archive. * * @returns IPRT status code. * * @param hVfsIosIn The compressed input stream. The reference is * not consumed, instead another one is retained. * @param fFlags Flags, MBZ. * @param phVfsFss Where to return the handle to the TAR * filesystem stream. */ RTDECL(int) RTZipPkzipFsStreamFromIoStream(RTVFSIOSTREAM hVfsIosIn, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss); /** * A mini UNZIP program. * * @returns Program exit code. * @ * @param cArgs The number of arguments. * @param papszArgs The argument vector. (Note that this may be * reordered, so the memory must be writable.) */ RTDECL(RTEXITCODE) RTZipUnzipCmd(unsigned cArgs, char **papszArgs); /** * Helper for decompressing files of a ZIP file located in memory. * * @returns IPRT status code. * * @param ppvDst Where to store the pointer to the allocated * buffer. To be freed with RTMemFree(). * @param pcbDst Where to store the pointer to the size of the * allocated buffer. * @param pvSrc Pointer to the buffer containing the .zip file. * @param cbSrc Size of the buffer containing the .zip file. * @param pszObject Name of the object to extract. */ RTDECL(int) RTZipPkzipMemDecompress(void **ppvDst, size_t *pcbDst, const void *pvSrc, size_t cbSrc, const char *pszObject); /** * Opens a XAR filesystem stream. * * This is used to extract, list or check a XAR archive. * * @returns IPRT status code. * * @param hVfsIosIn The compressed input stream. The reference is * not consumed, instead another one is retained. * @param fFlags Flags, MBZ. * @param phVfsFss Where to return the handle to the XAR filesystem * stream. */ RTDECL(int) RTZipXarFsStreamFromIoStream(RTVFSIOSTREAM hVfsIosIn, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss); /** @} */ RT_C_DECLS_END #endif