/* unzip.c -- IO for uncompress .zip files using zlib Version 1.1, February 14h, 2010 part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html ) Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html ) Modifications of Unzip for Zip64 Copyright (C) 2007-2008 Even Rouault Modifications for Zip64 support on both zip and unzip Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com ) For more info read MiniZip_info.txt ------------------------------------------------------------------------------------ Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of compatibility with older software. The following is from the original crypt.c. Code woven in by Terry Thorsen 1/2003. Copyright (c) 1990-2000 Info-ZIP. All rights reserved. See the accompanying file LICENSE, version 2000-Apr-09 or later (the contents of which are also included in zip.h) for terms of use. If, for some reason, all these files are missing, the Info-ZIP license also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h] The encryption/decryption parts of this source code (as opposed to the non-echoing password parts) were originally written in Europe. The whole source package can be freely distributed, including from the USA. (Prior to January 2000, re-export from the US was a violation of US law.) This encryption code is a direct transcription of the algorithm from Roger Schlafly, described by Phil Katz in the file appnote.txt. This file (appnote.txt) is distributed with the PKZIP program (even in the version without encryption capabilities). ------------------------------------------------------------------------------------ Changes in unzip.c 2007-2008 - Even Rouault - Addition of cpl_unzGetCurrentFileZStreamPos 2007-2008 - Even Rouault - Decoration of symbol names unz* -> cpl_unz* 2007-2008 - Even Rouault - Remove old C style function prototypes 2007-2008 - Even Rouault - Add unzip support for ZIP64 Copyright (C) 2007-2008 Even Rouault Oct-2009 - Mathias Svensson - Removed cpl_* from symbol names (Even Rouault added them but since this is now moved to a new project (minizip64) I renamed them again). Oct-2009 - Mathias Svensson - Fixed problem if uncompressed size was > 4G and compressed size was <4G should only read the compressed/uncompressed size from the Zip64 format if the size from normal header was 0xFFFFFFFF Oct-2009 - Mathias Svensson - Applied some bug fixes from patches received from Gilles Vollant Oct-2009 - Mathias Svensson - Applied support to unzip files with compression method BZIP2 (bzip2 lib is required) Patch created by Daniel Borca Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer Copyright (C) 1998 - 2010 Gilles Vollant, Even Rouault, Mathias Svensson */ #include <stdio.h> #include <stdlib.h> #include <string.h> #ifndef NOUNCRYPT #define NOUNCRYPT #endif #include "zlib.h" #include "unzip.h" #ifdef STDC # include <stddef.h> #endif #ifdef NO_ERRNO_H extern int errno; #else # include <errno.h> #endif #ifndef local #define local … #endif /* compile with -Dlocal if your debugger can't find static symbols */ #ifndef CASESENSITIVITYDEFAULT_NO # if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) #define CASESENSITIVITYDEFAULT_NO # endif #endif #ifndef UNZ_BUFSIZE #define UNZ_BUFSIZE … #endif #ifndef UNZ_MAXFILENAMEINZIP #define UNZ_MAXFILENAMEINZIP … #endif #ifndef ALLOC #define ALLOC(size) … #endif #define SIZECENTRALDIRITEM … #define SIZEZIPLOCALHEADER … const char unz_copyright[] = …; /* unz_file_info64_internal contain internal info about a file in zipfile*/ unz_file_info64_internal; /* file_in_zip_read_info_s contain internal information about a file in zipfile, when reading and decompress it */ file_in_zip64_read_info_s; /* unz64_s contain internal information about the zipfile */ unz64_s; #ifndef NOUNCRYPT #include "crypt.h" #endif /* =========================================================================== Reads a long in LSB order from the given gz_stream. Sets */ local int unz64local_getShort(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX) { … } local int unz64local_getLong(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX) { … } local int unz64local_getLong64(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T *pX) { … } /* My own strcmpi / strcasecmp */ local int strcmpcasenosensitive_internal(const char* fileName1, const char* fileName2) { … } #ifdef CASESENSITIVITYDEFAULT_NO #define CASESENSITIVITYDEFAULTVALUE … #else #define CASESENSITIVITYDEFAULTVALUE … #endif #ifndef STRCMPCASENOSENTIVEFUNCTION #define STRCMPCASENOSENTIVEFUNCTION … #endif /* Compare two filenames (fileName1,fileName2). If iCaseSensitivity = 1, comparison is case sensitive (like strcmp) If iCaseSensitivity = 2, comparison is not case sensitive (like strcmpi or strcasecmp) If iCaseSensitivity = 0, case sensitivity is default of your operating system (like 1 on Unix, 2 on Windows) */ extern int ZEXPORT unzStringFileNameCompare (const char* fileName1, const char* fileName2, int iCaseSensitivity) { … } #ifndef BUFREADCOMMENT #define BUFREADCOMMENT … #endif #ifndef CENTRALDIRINVALID #define CENTRALDIRINVALID … #endif /* Locate the Central directory of a zipfile (at the end, just before the global comment) */ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream) { … } /* Locate the Central directory 64 of a zipfile (at the end, just before the global comment) */ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream) { … } /* Open a Zip file. path contain the full pathname (by example, on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer "zlib/zlib114.zip". If the zipfile cannot be opened (file doesn't exist or in not valid), the return value is NULL. Else, the return value is a unzFile Handle, usable with other function of this unzip package. */ local unzFile unzOpenInternal(const void *path, zlib_filefunc64_32_def* pzlib_filefunc64_32_def, int is64bitOpenFunction) { … } extern unzFile ZEXPORT unzOpen2(const char *path, zlib_filefunc_def* pzlib_filefunc32_def) { … } extern unzFile ZEXPORT unzOpen2_64(const void *path, zlib_filefunc64_def* pzlib_filefunc_def) { … } extern unzFile ZEXPORT unzOpen(const char *path) { … } extern unzFile ZEXPORT unzOpen64(const void *path) { … } /* GODOT start */ extern void* unzGetOpaque(unzFile file) { unz64_s* s; if (file==NULL) return NULL; s=(unz64_s*)file; return s->z_filefunc.zfile_func64.opaque; }; /* GODOT end */ /* Close a ZipFile opened with unzOpen. If there is files inside the .Zip opened with unzOpenCurrentFile (see later), these files MUST be closed with unzCloseCurrentFile before call unzClose. return UNZ_OK if there is no problem. */ extern int ZEXPORT unzClose(unzFile file) { … } /* Write info about the ZipFile in the *pglobal_info structure. No preparation of the structure is needed return UNZ_OK if there is no problem. */ extern int ZEXPORT unzGetGlobalInfo64(unzFile file, unz_global_info64* pglobal_info) { … } extern int ZEXPORT unzGetGlobalInfo(unzFile file, unz_global_info* pglobal_info32) { … } /* Translate date/time from Dos format to tm_unz (readable more easily) */ local void unz64local_DosDateToTmuDate(ZPOS64_T ulDosDate, tm_unz* ptm) { … } /* Get Info about the current file in the zipfile, with internal only info */ local int unz64local_GetCurrentFileInfoInternal(unzFile file, unz_file_info64 *pfile_info, unz_file_info64_internal *pfile_info_internal, char *szFileName, uLong fileNameBufferSize, void *extraField, uLong extraFieldBufferSize, char *szComment, uLong commentBufferSize) { … } /* Write info about the ZipFile in the *pglobal_info structure. No preparation of the structure is needed return UNZ_OK if there is no problem. */ extern int ZEXPORT unzGetCurrentFileInfo64(unzFile file, unz_file_info64 * pfile_info, char * szFileName, uLong fileNameBufferSize, void *extraField, uLong extraFieldBufferSize, char* szComment, uLong commentBufferSize) { … } extern int ZEXPORT unzGetCurrentFileInfo(unzFile file, unz_file_info * pfile_info, char * szFileName, uLong fileNameBufferSize, void *extraField, uLong extraFieldBufferSize, char* szComment, uLong commentBufferSize) { … } /* Set the current file of the zipfile to the first file. return UNZ_OK if there is no problem */ extern int ZEXPORT unzGoToFirstFile(unzFile file) { … } /* Set the current file of the zipfile to the next file. return UNZ_OK if there is no problem return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest. */ extern int ZEXPORT unzGoToNextFile(unzFile file) { … } /* Try locate the file szFileName in the zipfile. For the iCaseSensitivity signification, see unzStringFileNameCompare return value : UNZ_OK if the file is found. It becomes the current file. UNZ_END_OF_LIST_OF_FILE if the file is not found */ extern int ZEXPORT unzLocateFile(unzFile file, const char *szFileName, int iCaseSensitivity) { … } /* /////////////////////////////////////////// // Contributed by Ryan Haksi (mailto://[email protected]) // I need random access // // Further optimization could be realized by adding an ability // to cache the directory in memory. The goal being a single // comprehensive file read to put the file I need in a memory. */ /* typedef struct unz_file_pos_s { ZPOS64_T pos_in_zip_directory; // offset in file ZPOS64_T num_of_file; // # of file } unz_file_pos; */ extern int ZEXPORT unzGetFilePos64(unzFile file, unz64_file_pos* file_pos) { … } extern int ZEXPORT unzGetFilePos(unzFile file, unz_file_pos* file_pos) { … } extern int ZEXPORT unzGoToFilePos64(unzFile file, const unz64_file_pos* file_pos) { … } extern int ZEXPORT unzGoToFilePos(unzFile file, unz_file_pos* file_pos) { … } /* // Unzip Helper Functions - should be here? /////////////////////////////////////////// */ /* Read the local header of the current zipfile Check the coherency of the local header and info in the end of central directory about this file store in *piSizeVar the size of extra info in local header (filename and size of extra field data) */ local int unz64local_CheckCurrentFileCoherencyHeader(unz64_s* s, uInt* piSizeVar, ZPOS64_T * poffset_local_extrafield, uInt * psize_local_extrafield) { … } /* Open for reading data the current file in the zipfile. If there is no error and the file is opened, the return value is UNZ_OK. */ extern int ZEXPORT unzOpenCurrentFile3(unzFile file, int* method, int* level, int raw, const char* password) { … } /* GODOT start */ extern int ZEXPORT unzSeekCurrentFile(unzFile file, int pos) { … } /* GODOT end */ extern int ZEXPORT unzOpenCurrentFile(unzFile file) { … } extern int ZEXPORT unzOpenCurrentFilePassword(unzFile file, const char* password) { … } extern int ZEXPORT unzOpenCurrentFile2(unzFile file, int* method, int* level, int raw) { … } /** Addition for GDAL : START */ extern ZPOS64_T ZEXPORT unzGetCurrentFileZStreamPos64(unzFile file) { … } /** Addition for GDAL : END */ /* Read bytes from the current file. buf contain buffer where data must be copied len the size of buf. return the number of byte copied if some bytes are copied return 0 if the end of file was reached return <0 with error code if there is an error (UNZ_ERRNO for IO error, or zLib error for uncompress error) */ extern int ZEXPORT unzReadCurrentFile(unzFile file, voidp buf, unsigned len) { … } /* Give the current position in uncompressed data */ extern z_off_t ZEXPORT unztell(unzFile file) { … } extern ZPOS64_T ZEXPORT unztell64(unzFile file) { … } /* return 1 if the end of file was reached, 0 elsewhere */ extern int ZEXPORT unzeof(unzFile file) { … } /* Read extra field from the current file (opened by unzOpenCurrentFile) This is the local-header version of the extra field (sometimes, there is more info in the local-header version than in the central-header) if buf==NULL, it return the size of the local extra field that can be read if buf!=NULL, len is the size of the buffer, the extra header is copied in buf. the return value is the number of bytes copied in buf, or (if <0) the error code */ extern int ZEXPORT unzGetLocalExtrafield(unzFile file, voidp buf, unsigned len) { … } /* Close the file in zip opened with unzOpenCurrentFile Return UNZ_CRCERROR if all the file was read but the CRC is not good */ extern int ZEXPORT unzCloseCurrentFile(unzFile file) { … } /* Get the global comment string of the ZipFile, in the szComment buffer. uSizeBuf is the size of the szComment buffer. return the number of byte copied or an error code <0 */ extern int ZEXPORT unzGetGlobalComment(unzFile file, char * szComment, uLong uSizeBuf) { … } /* Additions by RX '2004 */ extern ZPOS64_T ZEXPORT unzGetOffset64(unzFile file) { … } extern uLong ZEXPORT unzGetOffset(unzFile file) { … } extern int ZEXPORT unzSetOffset64(unzFile file, ZPOS64_T pos) { … } extern int ZEXPORT unzSetOffset (unzFile file, uLong pos) { … }
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