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326 lines
13 KiB
C
326 lines
13 KiB
C
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/* unzip.h -- IO for uncompress .zip files using zlib
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Version 0.15 beta, Mar 19th, 1998,
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Copyright (C) 1998 Gilles Vollant
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This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
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WinZip, InfoZip tools and compatible.
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Encryption and multi volume ZipFile (span) are not supported.
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Old compressions used by old PKZip 1.x are not supported
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THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
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CAN CHANGE IN FUTURE VERSION !!
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I WAIT FEEDBACK at mail info@winimage.com
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Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
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Condition of use and distribution are the same than zlib :
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef __UNZIP_H__
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#define __UNZIP_H__
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#include "../libs/zlib/zlib.h"
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#if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
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/* like the STRICT of WIN32, we define a pointer that cannot be converted
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from (void*) without cast */
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typedef struct TagunzFile__ { int unused; } unzFile__;
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typedef unzFile__ *unzFile;
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#else
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typedef void* unzFile;
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#endif
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/* tm_unz contain date/time info */
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typedef struct tm_unz_s
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{
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unsigned int tm_sec; /* seconds after the minute - [0,59] */
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unsigned int tm_min; /* minutes after the hour - [0,59] */
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unsigned int tm_hour; /* hours since midnight - [0,23] */
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unsigned int tm_mday; /* day of the month - [1,31] */
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unsigned int tm_mon; /* months since January - [0,11] */
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unsigned int tm_year; /* years - [1980..2044] */
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} tm_unz;
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/* unz_global_info structure contain global data about the ZIPfile
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These data comes from the end of central dir */
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typedef struct unz_global_info_s
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{
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unsigned long number_entry; /* total number of entries in the central dir on this disk */
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unsigned long size_comment; /* size of the global comment of the zipfile */
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} unz_global_info;
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/* unz_file_info contain information about a file in the zipfile */
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typedef struct unz_file_info_s
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{
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unsigned long version; /* version made by 2 unsigned chars */
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unsigned long version_needed; /* version needed to extract 2 unsigned chars */
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unsigned long flag; /* general purpose bit flag 2 unsigned chars */
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unsigned long compression_method; /* compression method 2 unsigned chars */
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unsigned long dosDate; /* last mod file date in Dos fmt 4 unsigned chars */
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unsigned long crc; /* crc-32 4 unsigned chars */
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unsigned long compressed_size; /* compressed size 4 unsigned chars */
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unsigned long uncompressed_size; /* uncompressed size 4 unsigned chars */
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unsigned long size_filename; /* filename length 2 unsigned chars */
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unsigned long size_file_extra; /* extra field length 2 unsigned chars */
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unsigned long size_file_comment; /* file comment length 2 unsigned chars */
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unsigned long disk_num_start; /* disk number start 2 unsigned chars */
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unsigned long internal_fa; /* internal file attributes 2 unsigned chars */
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unsigned long external_fa; /* external file attributes 4 unsigned chars */
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tm_unz tmu_date;
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} unz_file_info;
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/* unz_file_info_interntal contain internal info about a file in zipfile*/
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typedef struct unz_file_info_internal_s
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{
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unsigned long offset_curfile;/* relative offset of static header 4 unsigned chars */
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} unz_file_info_internal;
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/* file_in_zip_read_info_s contain internal information about a file in zipfile,
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when reading and decompress it */
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typedef struct
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{
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char *read_buffer; /* internal buffer for compressed data */
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z_stream stream; /* zLib stream structure for inflate */
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unsigned long pos_in_zipfile; /* position in unsigned char on the zipfile, for fseek*/
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unsigned long stream_initialised; /* flag set if stream structure is initialised*/
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unsigned long offset_local_extrafield;/* offset of the static extra field */
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unsigned int size_local_extrafield;/* size of the static extra field */
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unsigned long pos_local_extrafield; /* position in the static extra field in read*/
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unsigned long crc32; /* crc32 of all data uncompressed */
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unsigned long crc32_wait; /* crc32 we must obtain after decompress all */
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unsigned long rest_read_compressed; /* number of unsigned char to be decompressed */
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unsigned long rest_read_uncompressed;/*number of unsigned char to be obtained after decomp*/
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idFile * file; /* io structore of the zipfile */
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unsigned long compression_method; /* compression method (0==store) */
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unsigned long byte_before_the_zipfile;/* unsigned char before the zipfile, (>0 for sfx)*/
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} file_in_zip_read_info_s;
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/* unz_s contain internal information about the zipfile
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*/
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typedef struct
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{
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idFile_Cached * file; /* io structore of the zipfile */
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unz_global_info gi; /* public global information */
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unsigned long byte_before_the_zipfile;/* unsigned char before the zipfile, (>0 for sfx)*/
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unsigned long num_file; /* number of the current file in the zipfile*/
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unsigned long pos_in_central_dir; /* pos of the current file in the central dir*/
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unsigned long current_file_ok; /* flag about the usability of the current file*/
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unsigned long central_pos; /* position of the beginning of the central dir*/
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unsigned long size_central_dir; /* size of the central directory */
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unsigned long offset_central_dir; /* offset of start of central directory with
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respect to the starting disk number */
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unz_file_info cur_file_info; /* public info about the current file in zip*/
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unz_file_info_internal cur_file_info_internal; /* private info about it*/
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file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
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file if we are decompressing it */
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} unz_s;
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#define UNZ_OK (0)
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#define UNZ_END_OF_LIST_OF_FILE (-100)
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#define UNZ_ERRNO (Z_ERRNO)
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#define UNZ_EOF (0)
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#define UNZ_PARAMERROR (-102)
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#define UNZ_BADZIPFILE (-103)
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#define UNZ_INTERNALERROR (-104)
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#define UNZ_CRCERROR (-105)
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#define UNZ_CASESENSITIVE 1
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#define UNZ_NOTCASESENSITIVE 2
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#define UNZ_OSDEFAULTCASE 0
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extern int unzStringFileNameCompare (const char* fileName1, const char* fileName2, int iCaseSensitivity);
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/*
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Compare two filename (fileName1,fileName2).
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If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
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If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
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or strcasecmp)
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If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
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(like 1 on Unix, 2 on Windows)
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*/
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extern unzFile unzOpen (const char *path);
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extern unzFile unzReOpen (const char* path, unzFile file);
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/*
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Open a Zip file. path contain the full pathname (by example,
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on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
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"zlib/zlib111.zip".
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If the zipfile cannot be opened (file don't exist or in not valid), the
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return value is NULL.
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Else, the return value is a unzFile Handle, usable with other function
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of this unzip package.
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*/
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extern int unzClose (unzFile file);
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/*
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Close a ZipFile opened with unzipOpen.
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If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
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these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
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return UNZ_OK if there is no problem. */
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extern int unzGetGlobalInfo (unzFile file, unz_global_info *pglobal_info);
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/*
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Write info about the ZipFile in the *pglobal_info structure.
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No preparation of the structure is needed
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return UNZ_OK if there is no problem. */
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extern int unzGetGlobalComment (unzFile file, char *szComment, unsigned long uSizeBuf);
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/*
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Get the global comment string of the ZipFile, in the szComment buffer.
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uSizeBuf is the size of the szComment buffer.
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return the number of unsigned char copied or an error code <0
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*/
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/***************************************************************************/
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/* Unzip package allow you browse the directory of the zipfile */
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extern int unzGoToFirstFile (unzFile file);
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/*
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Set the current file of the zipfile to the first file.
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return UNZ_OK if there is no problem
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*/
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extern int unzGoToNextFile (unzFile file);
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/*
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Set the current file of the zipfile to the next file.
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return UNZ_OK if there is no problem
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return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
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*/
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extern int unzGetCurrentFileInfoPosition (unzFile file, unsigned long *pos );
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/*
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Get the position of the info of the current file in the zip.
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return UNZ_OK if there is no problem
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*/
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extern int unzSetCurrentFileInfoPosition (unzFile file, unsigned long pos );
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/*
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Set the position of the info of the current file in the zip.
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return UNZ_OK if there is no problem
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*/
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extern int unzLocateFile (unzFile file, const char *szFileName, int iCaseSensitivity);
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/*
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Try locate the file szFileName in the zipfile.
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For the iCaseSensitivity signification, see unzStringFileNameCompare
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return value :
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UNZ_OK if the file is found. It becomes the current file.
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UNZ_END_OF_LIST_OF_FILE if the file is not found
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*/
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extern int unzGetCurrentFileInfo (unzFile file, unz_file_info *pfile_info, char *szFileName, unsigned long fileNameBufferSize, void *extraField, unsigned long extraFieldBufferSize, char *szComment, unsigned long commentBufferSize);
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/*
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Get Info about the current file
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if pfile_info!=NULL, the *pfile_info structure will contain somes info about
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the current file
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if szFileName!=NULL, the filemane string will be copied in szFileName
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(fileNameBufferSize is the size of the buffer)
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if extraField!=NULL, the extra field information will be copied in extraField
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(extraFieldBufferSize is the size of the buffer).
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This is the Central-header version of the extra field
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if szComment!=NULL, the comment string of the file will be copied in szComment
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(commentBufferSize is the size of the buffer)
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*/
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/***************************************************************************/
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/* for reading the content of the current zipfile, you can open it, read data
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from it, and close it (you can close it before reading all the file)
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*/
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extern int unzOpenCurrentFile (unzFile file);
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/*
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Open for reading data the current file in the zipfile.
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If there is no error, the return value is UNZ_OK.
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*/
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extern int unzCloseCurrentFile (unzFile file);
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/*
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Close the file in zip opened with unzOpenCurrentFile
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Return UNZ_CRCERROR if all the file was read but the CRC is not good
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*/
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extern int unzReadCurrentFile (unzFile file, void* buf, unsigned len);
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/*
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Read unsigned chars from the current file (opened by unzOpenCurrentFile)
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buf contain buffer where data must be copied
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len the size of buf.
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return the number of unsigned char copied if somes unsigned chars are copied
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return 0 if the end of file was reached
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return <0 with error code if there is an error
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(UNZ_ERRNO for IO error, or zLib error for uncompress error)
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*/
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extern long unztell(unzFile file);
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/*
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Give the current position in uncompressed data
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*/
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extern int unzeof (unzFile file);
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/*
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return 1 if the end of file was reached, 0 elsewhere
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*/
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extern int unzGetLocalExtrafield (unzFile file, void* buf, unsigned len);
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/*
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Read extra field from the current file (opened by unzOpenCurrentFile)
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This is the local-header version of the extra field (sometimes, there is
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more info in the local-header version than in the central-header)
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if buf==NULL, it return the size of the local extra field
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if buf!=NULL, len is the size of the buffer, the extra header is copied in
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buf.
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the return value is the number of unsigned chars copied in buf, or (if <0)
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the error code
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*/
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#endif /* __UNZIP_H__ */
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