cpl_minizip_unzip.h

/* $Id$ */
/* Modified version by Even Rouault. :
     - Addition of cpl_unzGetCurrentFileZStreamPos
     - Decoration of symbol names unz* -> cpl_unz*
     - Undef EXPORT so that we are sure the symbols are not exported
     - Add support for ZIP64

 * Copyright (c) 2008, Even Rouault <even dot rouault at spatialys.com>

   Original licence available in port/LICENCE_minizip
*/

/* unzip.h -- IO for uncompress .zip files using zlib
   Version 1.01e, February 12th, 2005

   Copyright (C) 1998-2005 Gilles Vollant

   This unzip package allow extract file from .ZIP file, compatible with
  PKZip 2.04g WinZip, InfoZip tools and compatible.

   Multi volume ZipFile (span) are not supported.
   Encryption compatible with pkzip 2.04g only supported
   Old compressions used by old PKZip 1.x are not supported

   I WAIT FEEDBACK at mail info@winimage.com
   Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution

   Condition of use and distribution are the same than zlib :

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

/* for more info about .ZIP format, see
      http://www.info-zip.org/pub/infozip/doc/appnote-981119-iz.zip
      http://www.info-zip.org/pub/infozip/doc/
   PkWare has also a specification at :
      ftp://ftp.pkware.com/probdesc.zip
*/

#ifndef CPL_MINIZIP_UNZIP_H_INCLUDED
#define CPL_MINIZIP_UNZIP_H_INCLUDED

#ifndef DOXYGEN_SKIP

#include "cpl_vsi.h"
#define uLong64 vsi_l_offset

#ifdef __cplusplus
extern "C"
{
#endif

#ifndef _ZLIB_H
#include "cpl_zlib_header.h"  // to avoid warnings when including zlib.h
#endif

#ifndef CPL_MINIZIP_IOAPI_H_INCLUDED
#include "cpl_minizip_ioapi.h"
#endif

/* GDAL addition */
#define NOUNCRYPT
#undef ZEXPORT
#define ZEXPORT

#if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
    /* like the STRICT of WIN32, we define a pointer that cannot be converted
        from (void*) without cast */
    typedef struct TagunzFile__
    {
        int unused;
    } unzFile__;
    typedef unzFile__ *unzFile;
#else
typedef voidp unzFile;
#endif

#define UNZ_OK (0)
#define UNZ_END_OF_LIST_OF_FILE (-100)
#define UNZ_ERRNO (Z_ERRNO)
#define UNZ_EOF (0)
#define UNZ_PARAMERROR (-102)
#define UNZ_BADZIPFILE (-103)
#define UNZ_INTERNALERROR (-104)
#define UNZ_CRCERROR (-105)

    /* tm_unz contain date/time info */
    typedef struct tm_unz_s
    {
        uInt tm_sec;  /* seconds after the minute - [0,59] */
        uInt tm_min;  /* minutes after the hour - [0,59] */
        uInt tm_hour; /* hours since midnight - [0,23] */
        uInt tm_mday; /* day of the month - [1,31] */
        uInt tm_mon;  /* months since January - [0,11] */
        uInt tm_year; /* years - [1980..2044] */
    } tm_unz;

    /* unz_global_info structure contain global data about the ZIPfile
       These data comes from the end of central dir */
    typedef struct unz_global_info_s
    {
        uLong64 number_entry; /* total number of entries in
                                 the central dir on this disk */
        uLong size_comment;   /* size of the global comment of the zipfile */
    } unz_global_info;

    /* unz_file_info contain information about a file in the zipfile */
    typedef struct unz_file_info_s
    {
        uLong version;             /* version made by                 2 bytes */
        uLong version_needed;      /* version needed to extract       2 bytes */
        uLong flag;                /* general purpose bit flag        2 bytes */
        uLong compression_method;  /* compression method              2 bytes */
        uLong dosDate;             /* last mod file date in Dos fmt   4 bytes */
        uLong crc;                 /* crc-32                          4 bytes */
        uLong64 compressed_size;   /* compressed size                 4 bytes */
        uLong64 uncompressed_size; /* uncompressed size               4 bytes */
        uLong size_filename;       /* filename length                 2 bytes */
        uLong64
            file_extra_abs_offset; /* absolute offset in the file where file_extra is located */
        uLong size_file_extra;   /* extra field length              2 bytes */
        uLong size_file_comment; /* file comment length             2 bytes */

        uLong disk_num_start; /* disk number start               2 bytes */
        uLong internal_fa;    /* internal file attributes        2 bytes */
        uLong external_fa;    /* external file attributes        4 bytes */

        tm_unz tmu_date;
    } unz_file_info;

    extern int ZEXPORT cpl_unzStringFileNameCompare(const char *fileName1,
                                                    const char *fileName2,
                                                    int iCaseSensitivity);
    /*
       Compare two filename (fileName1,fileName2).
       If iCaseSenisivity = 1, comparison is case sensitivity (like strcmp)
       If iCaseSenisivity = 2, comparison is not case sensitivity (like strcmpi
                                    or strcasecmp)
       If iCaseSenisivity = 0, case sensitivity is default of your operating
       system (like 1 on Unix, 2 on Windows)
    */

    extern unzFile ZEXPORT cpl_unzOpen(const char *path);
    /*
      Open a Zip file. path contain the full pathname (by example,
         on a Windows XP computer "c:\\zlib\\zlib113.zip" or on an Unix computer
         "zlib/zlib113.zip".
         If the zipfile cannot be opened (file don'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.
    */

    extern unzFile ZEXPORT cpl_unzOpen2(const char *path,
                                        zlib_filefunc_def *pzlib_filefunc_def);
    /*
       Open a Zip file, like unzOpen, but provide a set of file low level API
          for read/write the zip file (see ioapi.h)
    */

    extern int ZEXPORT cpl_unzClose(unzFile file);
    /*
      Close a ZipFile opened with unzipOpen.
      If there is files inside the .Zip opened with unzOpenCurrentFile (see
      later), these files MUST be closed with unzipCloseCurrentFile before call
      unzipClose. return UNZ_OK if there is no problem. */

    extern int ZEXPORT cpl_unzGetGlobalInfo(unzFile file,
                                            unz_global_info *pglobal_info);
    /*
      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 cpl_unzGetGlobalComment(unzFile file, char *szComment,
                                               uLong uSizeBuf);
    /*
      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
    */

    /***************************************************************************/
    /* Unzip package allow you browse the directory of the zipfile */

    extern int ZEXPORT cpl_unzGoToFirstFile(unzFile file);
    /*
      Set the current file of the zipfile to the first file.
      return UNZ_OK if there is no problem
    */

    extern int ZEXPORT cpl_unzGoToNextFile(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 cpl_unzLocateFile(unzFile file, const char *szFileName,
                                         int iCaseSensitivity);
    /*
      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
    */

    /* ****************************************** */
    /* Ryan supplied functions */
    /* unz_file_info contain information about a file in the zipfile */
    typedef struct unz_file_pos_s
    {
        uLong64 pos_in_zip_directory; /* offset in zip file directory */
        uLong64 num_of_file;          /* # of file */
    } unz_file_pos;

    extern int ZEXPORT cpl_unzGetFilePos(unzFile file, unz_file_pos *file_pos);

    extern int ZEXPORT cpl_unzGoToFilePos(unzFile file, unz_file_pos *file_pos);

    /* ****************************************** */

    extern int ZEXPORT cpl_unzGetCurrentFileInfo(
        unzFile file, unz_file_info *pfile_info, char *szFileName,
        uLong fileNameBufferSize, void *extraField, uLong extraFieldBufferSize,
        char *szComment, uLong commentBufferSize);
    /*
      Get Info about the current file
      if pfile_info!=NULL, the *pfile_info structure will contain some info
      about the current file if szFileName!=NULL, the filename string will be
      copied in szFileName (fileNameBufferSize is the size of the buffer) if
      extraField!=NULL, the extra field information will be copied in extraField
                (extraFieldBufferSize is the size of the buffer).
                This is the Central-header version of the extra field
      if szComment!=NULL, the comment string of the file will be copied in
      szComment (commentBufferSize is the size of the buffer)
    */

    /** Addition for GDAL : START */

    extern uLong64 ZEXPORT cpl_unzGetCurrentFileZStreamPos(unzFile file);

    extern int cpl_unzGetLocalHeaderPos(unzFile file,
                                        uLong64 *pos_local_header);

    extern int cpl_unzCurrentFileInfoFromLocalHeader(
        unzFile file, uLong64 pos_local_header, unz_file_info *pfile_info,
        char *szFileName, size_t fileNameBufferSize, uLong64 *posData);

    /** Addition for GDAL : END */

    /***************************************************************************/
    /* for reading the content of the current zipfile, you can open it, read
       data from it, and close it (you can close it before reading all the file)
       */

    extern int ZEXPORT cpl_unzOpenCurrentFile(unzFile file);
    /*
      Open for reading data the current file in the zipfile.
      If there is no error, the return value is UNZ_OK.
    */

    extern int ZEXPORT cpl_unzOpenCurrentFilePassword(unzFile file,
                                                      const char *password);
    /*
      Open for reading data the current file in the zipfile.
      password is a crypting password
      If there is no error, the return value is UNZ_OK.
    */

    extern int ZEXPORT cpl_unzOpenCurrentFile2(unzFile file, int *method,
                                               int *level, int raw);
    /*
      Same than unzOpenCurrentFile, but open for read raw the file (not
      uncompress) if raw==1 *method will receive method of compression, *level
      will receive level of compression note : you can set level parameter as
      NULL (if you did not want known level, but you CANNOT set method parameter
      as NULL
    */

    extern int ZEXPORT cpl_unzOpenCurrentFile3(unzFile file, int *method,
                                               int *level, int raw,
                                               const char *password);
    /*
      Same than unzOpenCurrentFile, but open for read raw the file (not
      uncompress) if raw==1 *method will receive method of compression, *level
      will receive level of compression note : you can set level parameter as
      NULL (if you did not want known level, but you CANNOT set method parameter
      as NULL
    */

    extern int ZEXPORT cpl_unzCloseCurrentFile(unzFile file);
    /*
      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 cpl_unzReadCurrentFile(unzFile file, voidp buf,
                                              unsigned len);
    /*
      Read bytes from the current file (opened by unzOpenCurrentFile)
      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 z_off_t ZEXPORT cpl_unztell(unzFile file);
    /*
      Give the current position in uncompressed data
    */

    extern int ZEXPORT cpl_unzeof(unzFile file);
    /*
      return 1 if the end of file was reached, 0 elsewhere
    */

    extern int ZEXPORT cpl_unzGetLocalExtrafield(unzFile file, voidp buf,
                                                 unsigned len);
    /*
      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

      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
    */

    /***************************************************************************/

    /* Get the current file offset */
    extern uLong64 ZEXPORT cpl_unzGetOffset(unzFile file);

    /* Set the current file offset */
    extern int ZEXPORT cpl_unzSetOffset(unzFile file, uLong64 pos);

#ifdef __cplusplus
}
#endif

#endif /* #ifndef DOXYGEN_SKIP */

#endif /* CPL_MINIZIP_UNZIP_H_INCLUDED */