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- Unit Unzip;
- { ----------------------------------------------------------------- }
- { unzip.c -- IO on .zip files using zlib
- Version 0.15 beta, Mar 19th, 1998,
- unzip.h -- IO for uncompress .zip files using zlib
- Version 0.15 beta, Mar 19th, 1998,
-
- Copyright (C) 1998 Gilles Vollant <info@winimage.com>
- http://www.winimage.com/zLibDll/zip.htm
-
- This unzip package allow extract file from .ZIP file, compatible
- with PKZip 2.04g, WinZip, InfoZip tools and compatible.
- Encryption and multi volume ZipFile (span) are not supported.
- Old compressions used by old PKZip 1.x are not supported
-
- Pascal tranlastion
- Copyright (C) 2000 by Jacques Nomssi Nzali
- For conditions of distribution and use, see copyright notice in readme.txt }
-
-
- interface
-
- {$ifdef WIN32}
- {$define Delphi}
- {$endif}
-
- uses
- zutil,
- zLib,
- ziputils;
-
-
- const
- UNZ_OK = (0);
- UNZ_END_OF_LIST_OF_FILE = (-100);
- UNZ_ERRNO = (Z_ERRNO);
- UNZ_EOF = (0);
- UNZ_PARAMERROR = (-102);
- UNZ_BADZIPFILE = (-103);
- UNZ_INTERNALERROR = (-104);
- UNZ_CRCERROR = (-105);
- (*
- { tm_unz contain date/time info }
- type
- tm_unz = record
- tm_sec : uInt; { seconds after the minute - [0,59] }
- tm_min : uInt; { minutes after the hour - [0,59] }
- tm_hour : uInt; { hours since midnight - [0,23] }
- tm_mday : uInt; { day of the month - [1,31] }
- tm_mon : uInt; { months since January - [0,11] }
- tm_year : uInt; { years - [1980..2044] }
- end;
- *)
- { unz_global_info structure contain global data about the ZIPfile
- These data comes from the end of central dir }
- type
- unz_global_info = record
- number_entry : uLong; { total number of entries in
- the central dir on this disk }
- size_comment : uLong; { size of the global comment of the zipfile }
- end;
-
-
- { unz_file_info contain information about a file in the zipfile }
- type
- unz_file_info = record
- version : uLong; { version made by 2 bytes }
- version_needed : uLong; { version needed to extract 2 bytes }
- flag : uLong; { general purpose bit flag 2 bytes }
- compression_method : uLong; { compression method 2 bytes }
- dosDate : uLong; { last mod file date in Dos fmt 4 bytes }
- crc : uLong; { crc-32 4 bytes }
- compressed_size : uLong; { compressed size 4 bytes }
- uncompressed_size : uLong; { uncompressed size 4 bytes }
- size_filename : uLong; { filename length 2 bytes }
- size_file_extra : uLong; { extra field length 2 bytes }
- size_file_comment : uLong; { file comment length 2 bytes }
-
- disk_num_start : uLong; { disk number start 2 bytes }
- internal_fa : uLong; { internal file attributes 2 bytes }
- external_fa : uLong; { external file attributes 4 bytes }
-
- tmu_date : tm_unz;
- end;
- unz_file_info_ptr = ^unz_file_info;
-
-
- function unzStringFileNameCompare(const fileName1 : PChar;
- const fileName2 : PChar;
- iCaseSensitivity : int) : int;
- { Compare two filename (fileName1,fileName2).
- If iCaseSenisivity = 1 (1=true),
- comparision is case sensitive (like strcmp)
- If iCaseSenisivity = 2 (0=false),
- comparision is not case sensitive (like strcmpi or strcasecmp)
- If iCaseSenisivity = 0, case sensitivity is defaut of your
- operating system like 1 on Unix, 2 on Windows)
- }
-
-
- function unzOpen (const path : PChar) : unzFile;
-
- { Open a Zip file. path contain the full pathname (by example,
- on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
- "zlib/zlib111.zip".
- If the zipfile cannot be opened (file don't exist or in not valid), the
- return value is NIL.
- Else, the return value is a unzFile Handle, usable with other function
- of this unzip package.
- }
-
- function unzClose (afile : unzFile) : int;
-
- { Close a ZipFile opened with unzipOpen.
- If there are files inside the .Zip opened with unzOpenCurrentFile()
- (see later), these files MUST be closed with unzipCloseCurrentFile()
- before a call unzipClose.
- return UNZ_OK if there is no problem. }
-
- function unzGetGlobalInfo (afile : unzFile;
- var pglobal_info : unz_global_info) : int;
-
- { 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. }
-
- function unzGetGlobalComment (afile : unzFile;
- szComment : PChar;
- uSizeBuf : uLong) : int;
-
- { 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 }
-
- function unzGoToFirstFile(afile : unzFile) : int;
-
- { Set the current file of the zipfile to the first file.
- return UNZ_OK if there is no problem }
-
- function unzGoToNextFile(afile : unzFile) : int;
-
- { 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. }
-
-
- function unzLocateFile(afile : unzFile;
- const szFileName : PChar;
- iCaseSensitivity : int) : int; { ZEXPORT }
-
- { 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 }
-
-
- function unzGetCurrentFileInfo(afile : unzFile;
- pfile_info : unz_file_info_ptr;
- szFileName : PChar;
- fileNameBufferSize : uLong;
- extraField : voidp;
- extraFieldBufferSize : uLong;
- szComment : PChar;
- commentBufferSize : uLong) : int; { ZEXPORT }
-
- { Get Info about the current file
- if pfile_info<>NIL, the pfile_info^ structure will contain somes
- info about the current file
- if szFileName<>NIL, the filemane string will be copied in szFileName
- (fileNameBufferSize is the size of the buffer)
- if extraField<>NIL, 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<>NIL, the comment string of the file will be copied in
- szComment (commentBufferSize is the size of the buffer) }
-
-
- {***************************************************************************}
- {* 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) }
-
-
- function unzOpenCurrentFile(afile : unzFile) : int; { ZEXPORT }
-
- { Open for reading data the current file in the zipfile.
- If there is no error, the return value is UNZ_OK. }
-
-
- function unzCloseCurrentFile(afile : unzFile) : int; { ZEXPORT }
-
- { Close the file in zip opened with unzOpenCurrentFile
- Return UNZ_CRCERROR if all the file was read but the CRC is not good }
-
-
- function unzReadCurrentFile(afile : unzFile;
- buf : voidp;
- len : unsigned) : int; { ZEXPORT }
-
- { 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 somes 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) }
-
- function unztell(afile : unzFile) : z_off_t;
-
- { Give the current position in uncompressed data }
-
- function unzeof(afile : unzFile) : int;
-
- { return 1 if the end of file was reached, 0 elsewhere
- ! checks for valid params }
-
- function unzGetLocalExtrafield (afile : unzFile;
- buf : voidp;
- len : unsigned) : int;
- { 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=NIL, it return the size of the local extra field
-
- if buf<>NIL, 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 }
-
-
- { ----------------------------------------------------------------- }
-
- implementation
-
- uses
- {$ifdef Delphi}
- SysUtils,
- {$else}
- strings,
- {$endif}
- zInflate, crc;
-
- {$ifdef unix and not def (CASESENSITIVITYDEFAULT_YES) and \
- !defined(CASESENSITIVITYDEFAULT_NO)}
- {$define CASESENSITIVITYDEFAULT_NO}
- {$endif}
-
-
- const
- UNZ_BUFSIZE = Z_BUFSIZE;
- UNZ_MAXFILENAMEINZIP = Z_MAXFILENAMEINZIP;
-
- const
- unz_copyright : PChar = ' unzip 0.15 Copyright 1998 Gilles Vollant ';
-
- { unz_file_info_internal contain internal info about a file in zipfile }
- type
- unz_file_info_internal = record
- offset_curfile : uLong; { relative offset of local header 4 bytes }
- end;
- unz_file_info_internal_ptr = ^unz_file_info_internal;
-
-
- { file_in_zip_read_info_s contain internal information about a file
- in zipfile, when reading and decompress it }
- type
- file_in_zip_read_info_s = record
- read_buffer : PChar; { internal buffer for compressed data }
- stream : z_stream; { zLib stream structure for inflate }
-
- pos_in_zipfile : uLong; { position in byte on the zipfile, for fseek}
- stream_initialised : boolean; { flag set if stream structure is initialised}
-
- offset_local_extrafield : uLong;{ offset of the local extra field }
- size_local_extrafield : uInt;{ size of the local extra field }
- pos_local_extrafield : uLong; { position in the local extra field in read}
-
- crc32 : uLong; { crc32 of all data uncompressed }
- crc32_wait : uLong; { crc32 we must obtain after decompress all }
- rest_read_compressed : uLong; { number of byte to be decompressed }
- rest_read_uncompressed : uLong;{number of byte to be obtained after decomp}
- afile : FILEptr; { io structure of the zipfile }
- compression_method : uLong; { compression method (0=store) }
- byte_before_the_zipfile : uLong;{ byte before the zipfile, (>0 for sfx) }
- end;
- file_in_zip_read_info_s_ptr = ^file_in_zip_read_info_s;
-
-
- { unz_s contain internal information about the zipfile }
- type
- unz_s = record
- afile : FILEptr; { io structore of the zipfile }
- gi : unz_global_info; { public global information }
- byte_before_the_zipfile : uLong;{ byte before the zipfile, (>0 for sfx)}
- num_file : uLong; { number of the current file in the zipfile}
- pos_in_central_dir : uLong; { pos of the current file in the central dir}
- current_file_ok : boolean; { flag about the usability of the current file}
- central_pos : uLong; { position of the beginning of the central dir}
-
- size_central_dir : uLong; { size of the central directory }
- offset_central_dir : uLong; { offset of start of central directory with
- respect to the starting disk number }
-
- cur_file_info : unz_file_info; { public info about the current file in zip}
- cur_file_info_internal : unz_file_info_internal; { private info about it}
- pfile_in_zip_read : file_in_zip_read_info_s_ptr; { structure about the current
- file if we are decompressing it }
- end;
- unz_s_ptr = ^unz_s;
-
-
- { ===========================================================================
- Read a byte from a gz_stream; update next_in and avail_in. Return EOF
- for end of file.
- IN assertion: the stream s has been sucessfully opened for reading. }
-
-
- function unzlocal_getByte(fin : FILEptr; var pi : int) : int;
- var
- c : Byte;
- err : int;
- begin
- err := fread(@c, 1, 1, fin);
-
- if (err = 1) then
- begin
- pi := int(c);
- unzlocal_getByte := UNZ_OK;
- {exit;}
- end
- else
- begin
- if feof(fin)=1 then {if ferror(fin) then}
- unzlocal_getByte := UNZ_ERRNO
- else
- unzlocal_getByte := UNZ_EOF;
- {exit;}
- end;
- end;
-
-
- { ===========================================================================
- Reads a long in LSB order from the given gz_stream. Sets }
-
- function unzlocal_getShort (fin : FILEptr;
- var pX : uLong) : int;
- var
- x : uLong;
- i : int;
- err : int;
- begin
- err := unzlocal_getByte(fin, i);
- x := uLong(i);
-
- if (err=UNZ_OK) then
- err := unzlocal_getByte(fin,i);
- Inc(x, uLong(i) shl 8);
-
- if (err=UNZ_OK) then
- pX := x
- else
- pX := 0;
- unzlocal_getShort := err;
- end;
-
- function unzlocal_getLong (fin : FILEptr; var pX : uLong) : int;
- var
- x : uLong;
- i : int;
- err : int;
- begin
- err := unzlocal_getByte(fin,i);
- x := uLong(i);
-
- if (err=UNZ_OK) then
- err := unzlocal_getByte(fin,i);
- Inc(x, uLong(i) shl 8);
-
- if (err=UNZ_OK) then
- err := unzlocal_getByte(fin,i);
- Inc(x, uLong(i) shl 16);
-
- if (err=UNZ_OK) then
- err := unzlocal_getByte(fin,i);
- Inc(x, uLong(i) shl 24);
-
- if (err=UNZ_OK) then
- pX := x
- else
- pX := 0;
- unzlocal_getLong := err;
- end;
-
-
- { My own strcmpi / strcasecmp }
- function strcmpcasenosensitive_internal (fileName1 : PChar;
- fileName2 : PChar) : int;
- var
- c1, c2 : char;
- begin
- repeat
- c1 := fileName1^; Inc(fileName1);
- c2 := fileName2^; Inc(fileName2);
- if (c1>='a') and (c1<='z') then
- Dec(c1,$20);
- if (c2>='a') and (c2<='z') then
- Dec(c2, $20);
- if (c1=#0) then
- begin
- if c2=#0 then
- strcmpcasenosensitive_internal := 0
- else
- strcmpcasenosensitive_internal := -1;
- exit;
- end;
- if (c2=#0) then
- begin
- strcmpcasenosensitive_internal := 1;
- exit;
- end;
- if (c1<c2) then
- begin
- strcmpcasenosensitive_internal := -1;
- exit;
- end;
- if (c1>c2) then
- begin
- strcmpcasenosensitive_internal := 1;
- exit;
- end;
- until false;
- end;
-
-
- const
- CASESENSITIVITYDEFAULTVALUE = 2;
-
- function unzStringFileNameCompare(const fileName1 : PChar;
- const fileName2 : PChar;
- iCaseSensitivity : int) : int; { ZEXPORT }
- { Compare two filename (fileName1,fileName2).
- If iCaseSenisivity = 1 (1=true),
- comparision is case sensitive (like strcmp)
- If iCaseSenisivity = 2 (0=false),
- comparision is not case sensitive (like strcmpi or strcasecmp)
- If iCaseSenisivity = 0, case sensitivity is defaut of your
- operating system like 1 on Unix, 2 on Windows)
- }
- begin
- if (iCaseSensitivity=0) then
- iCaseSensitivity := CASESENSITIVITYDEFAULTVALUE;
-
- if (iCaseSensitivity=1) then
- begin
- unzStringFileNameCompare := strComp(fileName1,fileName2);
- exit;
- end;
-
- unzStringFileNameCompare := strcmpcasenosensitive_internal(fileName1,fileName2);
- end;
-
- const
- BUFREADCOMMENT = $400;
-
- { Locate the Central directory of a zipfile (at the end, just before
- the global comment) }
-
- function unzlocal_SearchCentralDir(fin : FILEptr) : uLong;
- var
- buf : pzByteArray;
- uSizeFile : uLong;
- uBackRead : uLong;
- uMaxBack : uLong;
- uPosFound : uLong;
- var
- uReadSize,uReadPos : uLong;
- i : int;
- begin
- uMaxBack := $ffff; { maximum size of global comment }
- uPosFound := 0;
-
- if (fseek(fin,0,SEEK_END) <> 0) then
- begin
- unzlocal_SearchCentralDir := 0;
- exit;
- end;
-
- uSizeFile := ftell(fin);
-
- if (uMaxBack>uSizeFile) then
- uMaxBack := uSizeFile;
-
- buf := pzByteArray(ALLOC(BUFREADCOMMENT+4));
- if (buf=NIL) then
- begin
- unzlocal_SearchCentralDir := 0;
- exit;
- end;
-
- uBackRead := 4;
- while (uBackRead<uMaxBack) do
- begin
-
- if (uBackRead+BUFREADCOMMENT>uMaxBack) then
- uBackRead := uMaxBack
- else
- Inc(uBackRead, BUFREADCOMMENT);
- uReadPos := uSizeFile-uBackRead ;
-
- if ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) then
- uReadSize := (BUFREADCOMMENT+4)
- else
- uReadSize := (uSizeFile-uReadPos);
-
- if fseek(fin,uReadPos,SEEK_SET)<>0 then
- break;
-
- if fread(buf, uInt(uReadSize), 1, fin)<>1 then
- break;
-
- i := int(uReadSize)-3;
- while (i>0) do
- begin
- Dec(i);
- if (buf^[i] = $50) and (buf^[i+1] = $4b) and { ENDHEADERMAGIC }
- (buf^[i+2] = $05) and (buf^[i+3] = $06) then
- begin
- uPosFound := uReadPos+uInt(i);
- break;
- end;
- end;
-
- if (uPosFound <> 0) then
- break;
- end;
- TRYFREE(buf);
- unzlocal_SearchCentralDir := uPosFound;
- end;
-
-
- { Open a Zip file. path contain the full pathname (by example,
- on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
- "zlib/zlib111.zip".
- If the zipfile cannot be opened (file don't exist or in not valid), the
- return value is NIL.
- Else, the return value is a unzFile Handle, usable with other function
- of this unzip package.
- }
-
- function unzOpen (const path : PChar) : unzFile; { ZEXPORT }
- var
- us : unz_s;
- s : unz_s_ptr;
- central_pos,uL : uLong;
- fin : FILEptr;
-
- number_disk : uLong; { number of the current dist, used for spaning ZIP,
- unsupported, always 0 }
- number_disk_with_CD : uLong; { number the the disk with central dir,
- used for spaning ZIP, unsupported, always 0 }
- number_entry_CD : uLong; { total number of entries in the central dir
- (same than number_entry on nospan) }
-
- err : int;
- begin
- err := UNZ_OK;
-
- if (unz_copyright[0]<>' ') then
- begin
- unzOpen := NIL;
- exit;
- end;
-
- fin := fopen(path,fopenread);
- if (fin=NIL) then
- begin
- unzOpen := NIL;
- exit;
- end;
-
- central_pos := unzlocal_SearchCentralDir(fin);
- if (central_pos = 0) then
- err := UNZ_ERRNO;
-
- if (fseek(fin,central_pos,SEEK_SET) <> 0) then
- err := UNZ_ERRNO;
-
- { the signature, already checked }
- if (unzlocal_getLong(fin,uL) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- { number of this disk }
- if (unzlocal_getShort(fin,number_disk) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- { number of the disk with the start of the central directory }
- if (unzlocal_getShort(fin,number_disk_with_CD) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- { total number of entries in the central dir on this disk }
- if (unzlocal_getShort(fin,us.gi.number_entry) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- { total number of entries in the central dir }
- if (unzlocal_getShort(fin,number_entry_CD) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if ((number_entry_CD <> us.gi.number_entry) or
- (number_disk_with_CD <> 0) or
- (number_disk <> 0)) then
- err := UNZ_BADZIPFILE;
-
- { size of the central directory }
- if (unzlocal_getLong(fin,us.size_central_dir)<>UNZ_OK) then
- err := UNZ_ERRNO;
-
- { offset of start of central directory with respect to the
- starting disk number }
- if (unzlocal_getLong(fin,us.offset_central_dir)<>UNZ_OK) then
- err := UNZ_ERRNO;
-
- { zipfile comment length }
- if (unzlocal_getShort(fin,us.gi.size_comment)<>UNZ_OK) then
- err := UNZ_ERRNO;
-
- if ((central_pos < us.offset_central_dir+us.size_central_dir) and
- (err = UNZ_OK)) then
- err := UNZ_BADZIPFILE;
-
- if (err<>UNZ_OK) then
- begin
- fclose(fin);
- unzOpen := NIL;
- exit;
- end;
-
- us.afile := fin;
- us.byte_before_the_zipfile := central_pos -
- (us.offset_central_dir + us.size_central_dir);
- us.central_pos := central_pos;
- us.pfile_in_zip_read := NIL;
-
- s := unz_s_ptr(ALLOC(sizeof(unz_s)));
- s^ := us;
- unzGoToFirstFile(unzFile(s));
- unzOpen := unzFile(s);
- end;
-
-
- { Close a ZipFile opened with unzipOpen.
- If there are files inside the .Zip opened with unzOpenCurrentFile()
- (see later), these files MUST be closed with unzipCloseCurrentFile()
- before a call unzipClose.
- return UNZ_OK if there is no problem. }
-
- function unzClose (afile : unzFile) : int; { ZEXPORT }
- var
- s : unz_s_ptr;
- begin
- if (afile=NIL) then
- begin
- unzClose := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
-
- if (s^.pfile_in_zip_read<>NIL) then
- unzCloseCurrentFile(afile);
-
- fclose(s^.afile);
- TRYFREE(s);
- unzClose := UNZ_OK;
- end;
-
- { 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. }
-
- function unzGetGlobalInfo (afile : unzFile;
- var pglobal_info : unz_global_info) : int; { ZEXPORT }
- var
- s : unz_s_ptr;
- begin
- if (afile=NIL) then
- begin
- unzGetGlobalInfo := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- pglobal_info := s^.gi;
- unzGetGlobalInfo := UNZ_OK;
- end;
-
-
- { Translate date/time from Dos format to tm_unz (more easily readable) }
- procedure unzlocal_DosDateToTmuDate (ulDosDate : uLong;
- var ptm : tm_unz);
- var
- uDate : uLong;
- begin
- uDate := uLong(ulDosDate shr 16);
- ptm.tm_mday := uInt(uDate and $1f) ;
- ptm.tm_mon := uInt((( (uDate) and $1E0) div $20)-1) ;
- ptm.tm_year := uInt(((uDate and $0FE00) div $0200)+1980) ;
-
- ptm.tm_hour := uInt ((ulDosDate and $F800) div $800);
- ptm.tm_min := uInt ((ulDosDate and $7E0) div $20) ;
- ptm.tm_sec := uInt (2*(ulDosDate and $1f)) ;
- end;
-
- { Get Info about the current file in the zipfile, with internal only info }
- function unzlocal_GetCurrentFileInfoInternal (
- afile : unzFile;
- pfile_info : unz_file_info_ptr;
- pfile_info_internal : unz_file_info_internal_ptr;
- szFileName : PChar;
- fileNameBufferSize : uLong;
- extraField : voidp;
- extraFieldBufferSize : uLong;
- szComment : PChar;
- commentBufferSize : uLong ) : int;
- var
- s : unz_s_ptr;
- file_info : unz_file_info;
- file_info_internal : unz_file_info_internal;
- err : int;
- uMagic : uLong;
- lSeek : long;
- var
- uSizeRead : uLong;
- begin
- err := UNZ_OK;
- lSeek := 0;
- if (afile = NIL) then
- begin
- unzlocal_GetCurrentFileInfoInternal := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
-
- if (fseek(s^.afile,
- s^.pos_in_central_dir+s^.byte_before_the_zipfile,SEEK_SET)<>0) then
- err := UNZ_ERRNO;
-
- { we check the magic }
- if (err=UNZ_OK) then
- if (unzlocal_getLong(s^.afile, uMagic) <> UNZ_OK) then
- err := UNZ_ERRNO
- else
- if (uMagic<> CENTRALHEADERMAGIC) then
- err := UNZ_BADZIPFILE;
-
- if (unzlocal_getShort(s^.afile, file_info.version) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.version_needed) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.flag) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.compression_method) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, file_info.dosDate) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- unzlocal_DosDateToTmuDate(file_info.dosDate, file_info.tmu_date);
-
- if (unzlocal_getLong(s^.afile, file_info.crc) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, file_info.compressed_size) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, file_info.uncompressed_size) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.size_filename) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.size_file_extra) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.size_file_comment) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.disk_num_start) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, file_info.internal_fa) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, file_info.external_fa) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, file_info_internal.offset_curfile) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- Inc(lSeek, file_info.size_filename);
- if ((err=UNZ_OK) and (szFileName<>NIL)) then
- begin
- if (file_info.size_filename<fileNameBufferSize) then
- begin
- (szFileName+file_info.size_filename)^:=#0;
- uSizeRead := file_info.size_filename;
- end
- else
- uSizeRead := fileNameBufferSize;
-
- if (file_info.size_filename>0) and (fileNameBufferSize>0) then
- begin
- if fread(szFileName, uInt(uSizeRead),1,s^.afile)<>1 then
- err := UNZ_ERRNO;
- end;
- Dec(lSeek, uSizeRead);
- end;
-
- if ((err=UNZ_OK) and (extraField<>NIL)) then
- begin
- if (file_info.size_file_extra<extraFieldBufferSize) then
- uSizeRead := file_info.size_file_extra
- else
- uSizeRead := extraFieldBufferSize;
-
- if (lSeek<>0) then
- begin
- if (fseek(s^.afile,lSeek,SEEK_CUR)=0) then
- lSeek := 0
- else
- err := UNZ_ERRNO;
- end;
-
- if ((file_info.size_file_extra>0) and (extraFieldBufferSize>0)) then
- begin
- if fread(extraField, uInt(uSizeRead),1, s^.afile)<>1 then
- err := UNZ_ERRNO;
- end;
- Inc(lSeek, file_info.size_file_extra - uSizeRead);
- end
- else
- Inc(lSeek, file_info.size_file_extra);
-
- if ((err=UNZ_OK) and (szComment<>NIL)) then
- begin
- if (file_info.size_file_comment<commentBufferSize) then
- begin
- (szComment+file_info.size_file_comment)^ := #0;
- uSizeRead := file_info.size_file_comment;
- end
- else
- uSizeRead := commentBufferSize;
-
- if (lSeek<>0) then
- begin
- if (fseek(s^.afile,lSeek,SEEK_CUR)=0) then
- lSeek := 0
- else
- err := UNZ_ERRNO;
- end;
- if ((file_info.size_file_comment>0) and (commentBufferSize>0)) then
- begin
- if fread(szComment, uInt(uSizeRead),1,s^.afile)<>1 then
- err := UNZ_ERRNO;
- end;
- Inc(lSeek, file_info.size_file_comment - uSizeRead);
- end
- else
- Inc(lSeek, file_info.size_file_comment);
-
- if ((err=UNZ_OK) and (pfile_info<>NIL)) then
- pfile_info^ := file_info;
-
- if ((err=UNZ_OK) and (pfile_info_internal<>NIL)) then
- pfile_info_internal^ := file_info_internal;
-
- unzlocal_GetCurrentFileInfoInternal := err;
- end;
-
-
- { 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. }
-
- function unzGetCurrentFileInfo(afile : unzFile;
- pfile_info : unz_file_info_ptr;
- szFileName : PChar;
- fileNameBufferSize : uLong;
- extraField : voidp;
- extraFieldBufferSize : uLong;
- szComment : PChar;
- commentBufferSize : uLong) : int; { ZEXPORT }
-
- { Get Info about the current file
- if pfile_info<>NIL, the pfile_info^ structure will contain somes
- info about the current file
- if szFileName<>NIL, the filemane string will be copied in szFileName
- (fileNameBufferSize is the size of the buffer)
- if extraField<>NIL, 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<>NIL, the comment string of the file will be copied in
- szComment (commentBufferSize is the size of the buffer) }
-
- begin
- unzGetCurrentFileInfo := unzlocal_GetCurrentFileInfoInternal(afile,
- pfile_info,NIL,szFileName,fileNameBufferSize, extraField,
- extraFieldBufferSize, szComment,commentBufferSize);
- end;
-
-
- { Set the current file of the zipfile to the first file.
- return UNZ_OK if there is no problem }
-
- function unzGoToFirstFile(afile : unzFile) : int; { ZEXPORT }
- var
- err : int;
- s : unz_s_ptr;
- begin
- if (afile=NIL) then
- begin
- unzGoToFirstFile := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- s^.pos_in_central_dir := s^.offset_central_dir;
- s^.num_file := 0;
- err := unzlocal_GetCurrentFileInfoInternal(afile, @s^.cur_file_info,
- @s^.cur_file_info_internal, NIL,0,NIL,0,NIL,0);
- s^.current_file_ok := (err = UNZ_OK);
- unzGoToFirstFile := err;
- end;
-
-
- { 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. }
-
- function unzGoToNextFile(afile : unzFile) : int; { ZEXPORT }
- var
- s : unz_s_ptr;
- err : int;
- begin
- if (afile=NIL) then
- begin
- unzGoToNextFile := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- if not s^.current_file_ok then
- begin
- unzGoToNextFile := UNZ_END_OF_LIST_OF_FILE;
- exit;
- end;
- if (s^.num_file+1 = s^.gi.number_entry) then
- begin
- unzGoToNextFile := UNZ_END_OF_LIST_OF_FILE;
- exit;
- end;
-
- Inc(s^.pos_in_central_dir,
- SIZECENTRALDIRITEM + s^.cur_file_info.size_filename +
- s^.cur_file_info.size_file_extra + s^.cur_file_info.size_file_comment);
- Inc(s^.num_file);
- err := unzlocal_GetCurrentFileInfoInternal(afile, @s^.cur_file_info,
- @s^.cur_file_info_internal, NIL,0,NIL,0,NIL,0);
- s^.current_file_ok := (err = UNZ_OK);
- unzGoToNextFile := err;
- end;
-
-
- { 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 }
-
- function unzLocateFile(afile : unzFile;
- const szFileName : PChar;
- iCaseSensitivity : int) : int; { ZEXPORT }
- var
- s : unz_s_ptr;
- err : int;
- num_fileSaved : uLong;
- pos_in_central_dirSaved : uLong;
- var
- szCurrentFileName : array[0..UNZ_MAXFILENAMEINZIP+1-1] of char;
- begin
- if (afile=NIL) then
- begin
- unzLocateFile := UNZ_PARAMERROR;
- exit;
- end;
-
- if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP) then
- begin
- unzLocateFile := UNZ_PARAMERROR;
- exit;
- end;
-
- s := unz_s_ptr(afile);
- if (not s^.current_file_ok) then
- begin
- unzLocateFile := UNZ_END_OF_LIST_OF_FILE;
- exit;
- end;
- num_fileSaved := s^.num_file;
- pos_in_central_dirSaved := s^.pos_in_central_dir;
-
- err := unzGoToFirstFile(afile);
-
- while (err = UNZ_OK) do
- begin
- unzGetCurrentFileInfo(afile,NIL,
- szCurrentFileName,sizeof(szCurrentFileName)-1, NIL,0,NIL,0);
- if (unzStringFileNameCompare(szCurrentFileName,
- szFileName,iCaseSensitivity)=0) then
- begin
- unzLocateFile := UNZ_OK;
- exit;
- end;
- err := unzGoToNextFile(afile);
- end;
-
- s^.num_file := num_fileSaved;
- s^.pos_in_central_dir := pos_in_central_dirSaved;
- unzLocateFile := err;
- end;
-
-
- { 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) }
-
- function unzlocal_CheckCurrentFileCoherencyHeader (
- s : unz_s_ptr;
- var piSizeVar : uInt;
- var poffset_local_extrafield : uLong;
- var psize_local_extrafield : uInt) : int;
- var
- uMagic,uData,uFlags : uLong;
- size_filename : uLong;
- size_extra_field : uLong;
- err : int;
- begin
- err := UNZ_OK;
-
- piSizeVar := 0;
- poffset_local_extrafield := 0;
- psize_local_extrafield := 0;
-
- if (fseek(s^.afile,s^.cur_file_info_internal.offset_curfile +
- s^.byte_before_the_zipfile,SEEK_SET)<>0) then
- begin
- unzlocal_CheckCurrentFileCoherencyHeader := UNZ_ERRNO;
- exit;
- end;
-
- if (err=UNZ_OK) then
- if (unzlocal_getLong(s^.afile, uMagic) <> UNZ_OK) then
- err := UNZ_ERRNO
- else
- if (uMagic<> $04034b50) then
- err := UNZ_BADZIPFILE;
-
- if (unzlocal_getShort(s^.afile, uData) <> UNZ_OK) then
- err := UNZ_ERRNO;
- {
- else
- if ((err=UNZ_OK) and (uData<>s^.cur_file_info.wVersion)) then
- err := UNZ_BADZIPFILE;
- }
- if (unzlocal_getShort(s^.afile, uFlags) <> UNZ_OK) then
- err := UNZ_ERRNO;
-
- if (unzlocal_getShort(s^.afile, uData) <> UNZ_OK) then
- err := UNZ_ERRNO
- else
- if ((err=UNZ_OK) and (uData<>s^.cur_file_info.compression_method)) then
- err := UNZ_BADZIPFILE;
-
- if ((err=UNZ_OK) and (s^.cur_file_info.compression_method<>0) and
- (s^.cur_file_info.compression_method<>Z_DEFLATED)) then
- err := UNZ_BADZIPFILE;
-
- if (unzlocal_getLong(s^.afile, uData) <> UNZ_OK) then { date/time }
- err := UNZ_ERRNO;
-
- if (unzlocal_getLong(s^.afile, uData) <> UNZ_OK) then { crc }
- err := UNZ_ERRNO
- else
- if ((err=UNZ_OK) and (uData<>s^.cur_file_info.crc) and
- ((uFlags and 8)=0)) then
- err := UNZ_BADZIPFILE;
-
- if (unzlocal_getLong(s^.afile, uData) <> UNZ_OK) then { size compr }
- err := UNZ_ERRNO
- else
- if ((err=UNZ_OK) and (uData<>s^.cur_file_info.compressed_size) and
- ((uFlags and 8)=0)) then
- err := UNZ_BADZIPFILE;
-
- if (unzlocal_getLong(s^.afile, uData) <> UNZ_OK) then { size uncompr }
- err := UNZ_ERRNO
- else
- if ((err=UNZ_OK) and (uData<>s^.cur_file_info.uncompressed_size) and
- ((uFlags and 8)=0)) then
- err := UNZ_BADZIPFILE;
-
-
- if (unzlocal_getShort(s^.afile, size_filename) <> UNZ_OK) then
- err := UNZ_ERRNO
- else
- if ((err=UNZ_OK) and (size_filename<>s^.cur_file_info.size_filename)) then
- err := UNZ_BADZIPFILE;
-
- Inc(piSizeVar, uInt(size_filename));
-
- if (unzlocal_getShort(s^.afile, size_extra_field) <> UNZ_OK) then
- err := UNZ_ERRNO;
- poffset_local_extrafield := s^.cur_file_info_internal.offset_curfile +
- SIZEZIPLOCALHEADER + size_filename;
- psize_local_extrafield := uInt(size_extra_field);
-
- Inc(piSizeVar, uInt(size_extra_field));
-
- unzlocal_CheckCurrentFileCoherencyHeader := err;
- end;
-
- { Open for reading data the current file in the zipfile.
- If there is no error, the return value is UNZ_OK. }
-
- function unzOpenCurrentFile(afile : unzFile) : int; { ZEXPORT }
- var
- err : int;
- Store : boolean;
- iSizeVar : uInt;
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- offset_local_extrafield : uLong; { offset of the local extra field }
- size_local_extrafield : uInt; { size of the local extra field }
- begin
- err := UNZ_OK;
-
- if (afile=NIL) then
- begin
- unzOpenCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- if not s^.current_file_ok then
- begin
- unzOpenCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
-
- if (s^.pfile_in_zip_read <> NIL) then
- unzCloseCurrentFile(afile);
-
- if (unzlocal_CheckCurrentFileCoherencyHeader(s, iSizeVar,
- offset_local_extrafield, size_local_extrafield)<>UNZ_OK) then
- begin
- unzOpenCurrentFile := UNZ_BADZIPFILE;
- exit;
- end;
-
- pfile_in_zip_read_info := file_in_zip_read_info_s_ptr(
- ALLOC(sizeof(file_in_zip_read_info_s)) );
- if (pfile_in_zip_read_info=NIL) then
- begin
- unzOpenCurrentFile := UNZ_INTERNALERROR;
- exit;
- end;
-
- pfile_in_zip_read_info^.read_buffer := PChar(ALLOC(UNZ_BUFSIZE));
- pfile_in_zip_read_info^.offset_local_extrafield := offset_local_extrafield;
- pfile_in_zip_read_info^.size_local_extrafield := size_local_extrafield;
- pfile_in_zip_read_info^.pos_local_extrafield := 0;
-
- if (pfile_in_zip_read_info^.read_buffer=NIL) then
- begin
- TRYFREE(pfile_in_zip_read_info);
- unzOpenCurrentFile := UNZ_INTERNALERROR;
- exit;
- end;
-
- pfile_in_zip_read_info^.stream_initialised := false;
-
- if ((s^.cur_file_info.compression_method<>0) and
- (s^.cur_file_info.compression_method<>Z_DEFLATED)) then
- err := UNZ_BADZIPFILE;
- Store := s^.cur_file_info.compression_method = 0;
-
- pfile_in_zip_read_info^.crc32_wait := s^.cur_file_info.crc;
- pfile_in_zip_read_info^.crc32 := 0;
- pfile_in_zip_read_info^.compression_method := s^.cur_file_info.compression_method;
- pfile_in_zip_read_info^.afile := s^.afile;
- pfile_in_zip_read_info^.byte_before_the_zipfile := s^.byte_before_the_zipfile;
-
- pfile_in_zip_read_info^.stream.total_out := 0;
-
- if (not Store) then
- begin
- pfile_in_zip_read_info^.stream.zalloc := NIL;
- pfile_in_zip_read_info^.stream.zfree := NIL;
- pfile_in_zip_read_info^.stream.opaque := voidpf(NIL);
-
- err := inflateInit2(pfile_in_zip_read_info^.stream, -MAX_WBITS);
-
- if (err = Z_OK) then
- pfile_in_zip_read_info^.stream_initialised := true;
- { windowBits is passed < 0 to tell that there is no zlib header.
- Note that in this case inflate *requires* an extra "dummy" byte
- after the compressed stream in order to complete decompression and
- return Z_STREAM_END.
- In unzip, i don't wait absolutely Z_STREAM_END because I known the
- size of both compressed and uncompressed data }
- end;
- pfile_in_zip_read_info^.rest_read_compressed := s^.cur_file_info.compressed_size ;
- pfile_in_zip_read_info^.rest_read_uncompressed := s^.cur_file_info.uncompressed_size ;
-
-
- pfile_in_zip_read_info^.pos_in_zipfile :=
- s^.cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + iSizeVar;
-
- pfile_in_zip_read_info^.stream.avail_in := uInt(0);
-
-
- s^.pfile_in_zip_read := pfile_in_zip_read_info;
- unzOpenCurrentFile := UNZ_OK;
- end;
-
-
- { 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 somes 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) }
-
- function unzReadCurrentFile(afile : unzFile;
- buf : voidp;
- len : unsigned) : int; { ZEXPORT }
-
- var
- err : int;
- iRead: uInt;
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- var
- uReadThis : uInt;
- var
- uDoCopy,i : uInt;
- var
- uTotalOutBefore,uTotalOutAfter : uLong;
- bufBefore : pBytef;
- uOutThis : uLong;
- flush : int;
- begin
- err := UNZ_OK;
- iRead := 0;
- if (afile=NIL) then
- begin
- unzReadCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- pfile_in_zip_read_info := s^.pfile_in_zip_read;
-
- if (pfile_in_zip_read_info=NIL) then
- begin
- unzReadCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
-
- if ((pfile_in_zip_read_info^.read_buffer = NIL)) then
- begin
- unzReadCurrentFile := UNZ_END_OF_LIST_OF_FILE;
- exit;
- end;
-
- if (len=0) then
- begin
- unzReadCurrentFile := 0;
- exit;
- end;
-
- pfile_in_zip_read_info^.stream.next_out := pBytef(buf);
-
- pfile_in_zip_read_info^.stream.avail_out := uInt(len);
-
- if (len>pfile_in_zip_read_info^.rest_read_uncompressed) then
- pfile_in_zip_read_info^.stream.avail_out :=
- uInt(pfile_in_zip_read_info^.rest_read_uncompressed);
-
- while (pfile_in_zip_read_info^.stream.avail_out>0) do
- begin
- if ((pfile_in_zip_read_info^.stream.avail_in = 0) and
- (pfile_in_zip_read_info^.rest_read_compressed>0) ) then
- begin
- uReadThis := UNZ_BUFSIZE;
- if (pfile_in_zip_read_info^.rest_read_compressed<uReadThis) then
- uReadThis := uInt(pfile_in_zip_read_info^.rest_read_compressed);
- if (uReadThis = 0) then
- begin
- unzReadCurrentFile := UNZ_EOF;
- exit;
- end;
- if (fseek(pfile_in_zip_read_info^.afile,
- pfile_in_zip_read_info^.pos_in_zipfile +
- pfile_in_zip_read_info^.byte_before_the_zipfile,SEEK_SET)<>0) then
- begin
- unzReadCurrentFile := UNZ_ERRNO;
- exit;
- end;
- if fread(pfile_in_zip_read_info^.read_buffer, uReadThis, 1,
- pfile_in_zip_read_info^.afile)<>1 then
- begin
- unzReadCurrentFile := UNZ_ERRNO;
- exit;
- end;
- Inc(pfile_in_zip_read_info^.pos_in_zipfile, uReadThis);
-
- Dec(pfile_in_zip_read_info^.rest_read_compressed, uReadThis);
-
- pfile_in_zip_read_info^.stream.next_in :=
- pBytef(pfile_in_zip_read_info^.read_buffer);
- pfile_in_zip_read_info^.stream.avail_in := uInt(uReadThis);
- end;
-
- if (pfile_in_zip_read_info^.compression_method=0) then
- begin
- if (pfile_in_zip_read_info^.stream.avail_out <
- pfile_in_zip_read_info^.stream.avail_in) then
- uDoCopy := pfile_in_zip_read_info^.stream.avail_out
- else
- uDoCopy := pfile_in_zip_read_info^.stream.avail_in;
-
- for i:=0 to uDoCopy-1 do
- pzByteArray(pfile_in_zip_read_info^.stream.next_out)^[i] :=
- pzByteArray(pfile_in_zip_read_info^.stream.next_in)^[i];
-
- pfile_in_zip_read_info^.crc32 := crc32(pfile_in_zip_read_info^.crc32,
- pfile_in_zip_read_info^.stream.next_out, uDoCopy);
- Dec(pfile_in_zip_read_info^.rest_read_uncompressed, uDoCopy);
- Dec(pfile_in_zip_read_info^.stream.avail_in, uDoCopy);
- Dec(pfile_in_zip_read_info^.stream.avail_out, uDoCopy);
- Inc(pfile_in_zip_read_info^.stream.next_out, uDoCopy);
- Inc(pfile_in_zip_read_info^.stream.next_in, uDoCopy);
- Inc(pfile_in_zip_read_info^.stream.total_out, uDoCopy);
- Inc(iRead, uDoCopy);
- end
- else
- begin
- flush := Z_SYNC_FLUSH;
-
- uTotalOutBefore := pfile_in_zip_read_info^.stream.total_out;
- bufBefore := pfile_in_zip_read_info^.stream.next_out;
-
- {
- if ((pfile_in_zip_read_info^.rest_read_uncompressed =
- pfile_in_zip_read_info^.stream.avail_out) and
- (pfile_in_zip_read_info^.rest_read_compressed = 0)) then
- flush := Z_FINISH;
- }
- err := inflate(pfile_in_zip_read_info^.stream,flush);
-
- uTotalOutAfter := pfile_in_zip_read_info^.stream.total_out;
- uOutThis := uTotalOutAfter-uTotalOutBefore;
-
- pfile_in_zip_read_info^.crc32 :=
- crc32(pfile_in_zip_read_info^.crc32,bufBefore, uInt(uOutThis));
-
- Dec(pfile_in_zip_read_info^.rest_read_uncompressed, uOutThis);
-
- Inc(iRead, uInt(uTotalOutAfter - uTotalOutBefore));
-
- if (err=Z_STREAM_END) then
- begin
- if iRead=0 then
- unzReadCurrentFile := UNZ_EOF
- else
- unzReadCurrentFile := iRead;
- exit;
- end;
- if (err<>Z_OK) then
- break;
- end;
- end; { while }
-
- if (err=Z_OK) then
- begin
- unzReadCurrentFile := iRead;
- exit;
- end;
- unzReadCurrentFile := err;
- end;
-
- { Give the current position in uncompressed data }
-
- function unztell(afile : unzFile) : z_off_t; { ZEXPORT }
- var
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- begin
- if (afile=NIL) then
- begin
- unztell := UNZ_PARAMERROR;
- exit;
- end;
-
- s := unz_s_ptr(afile);
- pfile_in_zip_read_info := s^.pfile_in_zip_read;
-
- if (pfile_in_zip_read_info=NIL) then
- begin
- unztell := UNZ_PARAMERROR;
- exit;
- end;
-
- unztell := z_off_t(pfile_in_zip_read_info^.stream.total_out);
- end;
-
-
- { return 1 (TRUE) if the end of file was reached, 0 elsewhere }
-
- function unzeof(afile : unzFile) : int;
- var
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- begin
- if (afile=NIL) then
- begin
- unzeof := UNZ_PARAMERROR;
- exit;
- end;
-
- s := unz_s_ptr(afile);
- pfile_in_zip_read_info := s^.pfile_in_zip_read;
-
- if (pfile_in_zip_read_info = NIL) then
- begin
- unzeof := UNZ_PARAMERROR;
- exit;
- end;
-
- if (pfile_in_zip_read_info^.rest_read_uncompressed = 0) then
- unzeof := 1
- else
- unzeof := 0;
- end;
-
-
- { 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=NIL, it return the size of the local extra field
-
- if buf<>NIL, 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 }
-
- function unzGetLocalExtrafield (afile : unzFile;
- buf : voidp;
- len : unsigned) : int;
- var
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- read_now : uInt;
- size_to_read : uLong;
- begin
- if (afile=NIL) then
- begin
- unzGetLocalExtrafield := UNZ_PARAMERROR;
- exit;
- end;
-
- s := unz_s_ptr(afile);
- pfile_in_zip_read_info := s^.pfile_in_zip_read;
-
- if (pfile_in_zip_read_info=NIL) then
- begin
- unzGetLocalExtrafield := UNZ_PARAMERROR;
- exit;
- end;
-
- size_to_read := (pfile_in_zip_read_info^.size_local_extrafield -
- pfile_in_zip_read_info^.pos_local_extrafield);
-
- if (buf=NIL) then
- begin
- unzGetLocalExtrafield := int(size_to_read);
- exit;
- end;
-
- if (len>size_to_read) then
- read_now := uInt(size_to_read)
- else
- read_now := uInt(len);
-
- if (read_now=0) then
- begin
- unzGetLocalExtrafield := 0;
- exit;
- end;
-
- if (fseek(pfile_in_zip_read_info^.afile,
- pfile_in_zip_read_info^.offset_local_extrafield +
- pfile_in_zip_read_info^.pos_local_extrafield,SEEK_SET)<>0) then
- begin
- unzGetLocalExtrafield := UNZ_ERRNO;
- exit;
- end;
-
- if fread(buf,uInt(size_to_read),1, pfile_in_zip_read_info^.afile)<>1 then
- begin
- unzGetLocalExtrafield := UNZ_ERRNO;
- exit;
- end;
-
- unzGetLocalExtrafield := int(read_now);
- end;
-
- { Close the file in zip opened with unzOpenCurrentFile
- Return UNZ_CRCERROR if all the file was read but the CRC is not good }
-
- function unzCloseCurrentFile(afile : unzFile) : int; { ZEXPORT }
- var
- err : int;
- s : unz_s_ptr;
- pfile_in_zip_read_info : file_in_zip_read_info_s_ptr;
- begin
- err := UNZ_OK;
-
- if (afile=NIL) then
- begin
- unzCloseCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
- pfile_in_zip_read_info := s^.pfile_in_zip_read;
-
- if (pfile_in_zip_read_info=NIL) then
- begin
- unzCloseCurrentFile := UNZ_PARAMERROR;
- exit;
- end;
-
-
- if (pfile_in_zip_read_info^.rest_read_uncompressed = 0) then
- begin
- if (pfile_in_zip_read_info^.crc32 <> pfile_in_zip_read_info^.crc32_wait) then
- err :=UNZ_CRCERROR;
- end;
-
-
- TRYFREE(pfile_in_zip_read_info^.read_buffer);
- pfile_in_zip_read_info^.read_buffer := NIL;
- if (pfile_in_zip_read_info^.stream_initialised) then
- inflateEnd(pfile_in_zip_read_info^.stream);
-
- pfile_in_zip_read_info^.stream_initialised := false;
- TRYFREE(pfile_in_zip_read_info);
-
- s^.pfile_in_zip_read := NIL;
-
- unzCloseCurrentFile := err;
- end;
-
-
- { 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 }
-
- function unzGetGlobalComment (afile : unzFile;
- szComment : PChar;
- uSizeBuf : uLong) : int; { ZEXPORT }
-
- var
- s : unz_s_ptr;
- uReadThis : uLong;
- begin
- if (afile=NIL) then
- begin
- unzGetGlobalComment := UNZ_PARAMERROR;
- exit;
- end;
- s := unz_s_ptr(afile);
-
- uReadThis := uSizeBuf;
- if (uReadThis>s^.gi.size_comment) then
- uReadThis := s^.gi.size_comment;
-
- if (fseek(s^.afile,s^.central_pos+22,SEEK_SET)<>0) then
- begin
- unzGetGlobalComment := UNZ_ERRNO;
- exit;
- end;
-
- if (uReadThis>0) then
- begin
- szComment^ := #0;
- if fread(szComment, uInt(uReadThis), 1,s^.afile)<>1 then
- begin
- unzGetGlobalComment := UNZ_ERRNO;
- exit;
- end;
- end;
-
- if ((szComment <> NIL) and (uSizeBuf > s^.gi.size_comment)) then
- (szComment+s^.gi.size_comment)^ := #0;
-
- unzGetGlobalComment := int(uReadThis);
- end;
-
- end.
-