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UnZip32.pas
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UnZip32.pas
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(*
-----------------------------------------------------------------------------------------
STATE
-----------------------------------------------------------------------------------------
THIS SOFTWARE IS FREEWARE AND IS PROVIDED AS IS AND COMES WITH NO WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED. IN NO EVENT WILL THE AUTHOR(S) BE LIABLE FOR
ANY DAMAGES RESULTING FROM THE USE OF THIS SOFTWARE.
-----------------------------------------------------------------------------------------
INFORMATION
-----------------------------------------------------------------------------------------
Description : Info-Zip's header files for its UnZip32.dll ( version 5.4 ) translated to
Pascal (Delphi)
Tested : Delphi 2, 3, 4, 5
Author : Theo Bebekis <[email protected]>
More info : For more information and information regarding Copyright and Distribution
rights of the Info-Zip's work contact Info-Zip at
http://www.cdrom.com/pub/infozip/
InfoZip provides the Wiz.exe, a Windows application for zipping and
unzipping files. You can find examples for the dll calls in the Wiz.exe
sources (C language) which you can obtain from the above site.
License : Check Info-Zip's license in the accompanying license.htm
Thanks to : Davide Moretti
Marcel van Brakel
Rudy Velthuis
Danny Thorpe
from the [email protected] mailing list who helped me with their
advises to finish this translation.
JEDI : http://www.delphi-jedi.org/
-----------------------------------------------------------------------------------------
HISTORY
-----------------------------------------------------------------------------------------
Version Date Changes - Additions By
-----------------------------------------------------------------------------------------
0.01 30.06.1999 Initial Version Theo Bebekis
-----------------------------------------------------------------------------------------
*)
unit UnZip32;
interface
uses
Windows;
const
UNZIP_DLL = 'UNZIP32.DLL';
{ unzver.h }
const
UNZIP_DLL_VERSION = '5.4';
COMPANY_NAME = 'Info-ZIP';
{ windll.h }
const
IDM_REPLACE_NO = 100;
IDM_REPLACE_TEXT = 101;
IDM_REPLACE_YES = 102;
IDM_REPLACE_ALL = 103;
IDM_REPLACE_NONE = 104;
IDM_REPLACE_RENAME = 105;
IDM_REPLACE_HELP = 106;
{ structs.h }
const
PATH_MAX = 260; { max total file or directory name path }
{ user functions for use with the TUserFunctions structure }
type
TDllPrnt = function(Buffer: PChar; Size: ULONG): integer; stdcall;
TDllPassword = function(P: PChar; N: Integer; M, Name: PChar): integer; stdcall;
TDllService = function (CurFile: PChar; Size: ULONG): integer; stdcall;
TDllSnd = procedure; stdcall;
TDllReplace = function(FileName: PChar): integer; stdcall;
TDllMessage = procedure (UnCompSize : ULONG;
CompSize : ULONG;
Factor : UINT;
Month : UINT;
Day : UINT;
Year : UINT;
Hour : UINT;
Minute : UINT;
C : Char;
FileName : PChar;
MethBuf : PChar;
CRC : ULONG;
Crypt : Char); stdcall;
type
PUserFunctions = ^TUserFunctions;
USERFUNCTIONS = record
Print : TDllPrnt;
Sound : TDllSnd;
Replace : TDllReplace;
Password : TDllPassword;
SendApplicationMessage : TDllMessage;
ServCallBk : TDllService;
TotalSizeComp : ULONG;
TotalSize : ULONG;
CompFactor : Integer;
NumMembers : UINT;
cchComment : UINT;
end;
TUserFunctions = USERFUNCTIONS;
{ unzip options }
type
PDCL = ^TDCL;
DCL = record
ExtractOnlyNewer : Integer; { true if you are to extract only newer }
SpaceToUnderscore : Integer; { true if convert space to underscore }
PromptToOverwrite : Integer; { true if prompt to overwrite is wanted }
fQuiet : Integer; { quiet flag. 1 = few messages, 2 = no messages, 0 = all messages }
nCFlag : Integer; { write to stdout if true }
nTFlag : Integer; { test zip file }
nVFlag : Integer; { verbose listing }
nUFlag : Integer; { "update" (extract only newer/new files) }
nZFlag : Integer; { display zip file comment }
nDFlag : Integer; { all args are files/dir to be extracted }
nOFlag : Integer; { true if you are to always over-write files, false if not }
nAFlag : Integer; { do end-of-line translation }
nZIFlag : Integer; { get zip info if true }
C_flag : Integer; { be case insensitive if TRUE }
fPrivilege : Integer; { 1 => restore Acl's, 2 => Use privileges }
lpszZipFN : PChar; { zip file name }
lpszExtractDir : PChar; { Directory to extract to. NULL for the current directory }
end ;
TDCL = DCL;
{ unzip.h }
type
_UzpBuffer = record { rxstr }
StrLength : ULONG; { length of string }
StrPtr : PChar; { pointer to string }
end ;
TUzpBuffer = _UzpBuffer;
type
{ intended to be a private struct }
_ver = record
Major : UCHAR; { e.g., integer 5 }
Minor : UCHAR; { e.g., 2 }
PatchLevel : UCHAR; { e.g., 0 }
Not_Used : UCHAR;
end ;
TVersionType = _ver;
type
PUzpVer = ^TUzpVer;
_UzpVer = record
StructLen : ULONG; { length of the struct being passed }
Flag : ULONG; { bit 0: is_beta bit 1: uses_zlib }
BetaLevel : PChar; { e.g., "g BETA" or "" }
Date : PChar; { e.g., "4 Sep 95" (beta) or "4 September 1995" }
ZLib_Version : PChar; { e.g., "0.95" or NULL }
UnZip : TVersionType;
ZipInfo : TVersionType;
OS2Dll : TVersionType;
WinDll : TVersionType;
end;
TUzpVer = _UzpVer;
{ for Visual BASIC access to Windows DLLs }
type
_UzpVer2 = record
StructLen : ULONG; { length of the struct being passed }
Flag : ULONG; { bit 0: is_beta bit 1: uses_zlib }
BetaLevel : array[0..10-1] of Char; { e.g., "g BETA" or "" }
Date : array[0..20-1] of Char; { e.g., "4 Sep 95" (beta) or "4 September 1995" }
ZLib_Version : array[0..10-1] of Char; { e.g., "0.95" or NULL }
UnZip : TVersionType;
ZipInfo : TVersionType;
OS2Dll : TVersionType;
WinDll : TVersionType;
end ;
TUzpVer2 = _UzpVer2;
const
UZPVER_LEN = SizeOf(TUzpVer);
{ Return (and exit) values of the public UnZip API functions. }
const
{ external return codes }
PK_OK = 0; { no error }
PK_COOL = 0; { no error }
PK_GNARLY = 0; { no error }
PK_WARN = 1; { warning error }
PK_ERR = 2; { error in zipfile }
PK_BADERR = 3; { severe error in zipfile }
PK_MEM = 4; { insufficient memory (during initialization) }
PK_MEM2 = 5; { insufficient memory (password failure) }
PK_MEM3 = 6; { insufficient memory (file decompression) }
PK_MEM4 = 7; { insufficient memory (memory decompression) }
PK_MEM5 = 8; { insufficient memory (not yet used) }
PK_NOZIP = 9; { zipfile not found }
PK_PARAM = 10; { bad or illegal parameters specified }
PK_FIND = 11; { no files found }
PK_DISK = 50; { disk full }
PK_EOF = 51; { unexpected EOF }
IZ_CTRLC = 80; { user hit ^C to terminate }
IZ_UNSUP = 81; { no files found: all unsup. compr/encrypt. }
IZ_BADPWD = 82; { no files found: all had bad password }
{ internal and DLL-only return codes }
IZ_DIR = 76; { potential zipfile is a directory }
IZ_CREATED_DIR = 77; { directory created: set time and permissions }
IZ_VOL_LABEL = 78; { volume label, but can't set on hard disk }
IZ_EF_TRUNC = 79; { local extra field truncated (PKZIP'd) }
{ return codes of password fetches (negative = user abort; positive = error) }
IZ_PW_ENTERED = 0; { got some password string; use/try it }
IZ_PW_CANCEL = -1; { no password available (for this entry) }
IZ_PW_CANCELALL = -2; { no password, skip any further pwd. request }
IZ_PW_ERROR = 5; { = PK_MEM2 : failure (no mem, no tty, ...) }
{ flag values for status callback function }
UZ_ST_START_EXTRACT = 1;
UZ_ST_IN_PROGRESS = 2;
UZ_ST_FINISH_MEMBER = 3;
{ return values of status callback function }
UZ_ST_CONTINUE = 0;
UZ_ST_BREAK = 1;
type
PPChar = ^PChar;
{ dll prototypes }
{ decs.h }
procedure Wiz_NoPrinting(Flag: Integer); stdcall;
function Wiz_Validate(Archive: PChar; AllCodes: Integer): Integer; stdcall;
function Wiz_Init(var pG; var UserFunc: TUserFunctions): Bool; stdcall;
function Wiz_SetOpts(var pG; var Options: TDCL): Bool; stdcall;
function Wiz_Unzip(var pG; ifnc: Integer; ifnv: PPChar; xfnc: Integer; xfnv: PPChar): Integer; stdcall;
function Wiz_SingleEntryUnzip(ifnc: Integer; ifnv: PPChar; xfnc: Integer;
xfnv: PPChar; var Options: TDCL;
var UserFunc: TUserFunctions): Integer; stdcall;
function Wiz_UnzipToMemory(Zip: PChar; FileName: PChar; var UserFunctions: TUserFunctions;
var RetStr: TUzpBuffer): Integer; stdcall;
function Wiz_Grep(Archive: PChar; FileName: PChar; Pattern: PChar; Cmd: Integer;
SkipBin: Integer; var UserFunctions: TUserFunctions): Integer; stdcall;
{ unzip.h }
procedure UzpFreeMemBuffer(var RetStr: TUzpBuffer); stdcall;
function UzpVersion: PUzpVer; stdcall;
procedure UzpVersion2(var Version: TUzpVer2); stdcall;
{ helper }
function IsExpectedUnZipDllVersion: boolean;
implementation
uses
SysUtils;
{ dll routines }
{ decs.h }
procedure Wiz_NoPrinting; external UNZIP_DLL name 'Wiz_NoPrinting';
function Wiz_Validate; external UNZIP_DLL name 'Wiz_Validate';
function Wiz_Init; external UNZIP_DLL name 'Wiz_Init';
function Wiz_SetOpts; external UNZIP_DLL name 'Wiz_SetOpts';
function Wiz_Unzip; external UNZIP_DLL name 'Wiz_Unzip';
function Wiz_SingleEntryUnzip; external UNZIP_DLL name 'Wiz_SingleEntryUnzip';
function Wiz_UnzipToMemory; external UNZIP_DLL name 'Wiz_UnzipToMemory';
function Wiz_Grep; external UNZIP_DLL name 'Wiz_Grep';
{ unzip.h }
procedure UzpFreeMemBuffer; external UNZIP_DLL name 'UzpFreeMemBuffer';
function UzpVersion; external UNZIP_DLL name 'UzpVersion';
procedure UzpVersion2; external UNZIP_DLL name 'UzpVersion2';
type
TFVISubBlock = (sbCompanyName, sbFileDescription, sbFileVersion, sbInternalName, sbLegalCopyright,
sbLegalTradeMarks, sbOriginalFilename, sbProductName, sbProductVersion, sbComments);
{----------------------------------------------------------------------------------
Description : retrieves selected version information from the specified
version-information resource. True on success
Parameters :
const FullPath : string; the exe or dll full path
SubBlock : TFVISubBlock; the requested sub block information ie sbCompanyName
var sValue : string the returned string value
Error checking : YES
Notes :
1. 32bit only ( It does not work with 16-bit Windows file images )
2. TFVISubBlock is declared as
TFVISubBlock = (sbCompanyName, sbFileDescription, sbFileVersion, sbInternalName,
sbLegalCopyright, sbLegalTradeMarks, sbOriginalFilename,
sbProductName, sbProductVersion, sbComments);
Tested : in Delphi 4 only
Author : Theo Bebekis <[email protected]>
-----------------------------------------------------------------------------------}
function Get_FileVersionInfo(const FullPath: string; SubBlock: TFVISubBlock; var sValue: string):boolean;
const
arStringNames : array[sbCompanyName..sbComments] of string =
('CompanyName', 'FileDescription', 'FileVersion', 'InternalName', 'LegalCopyright',
'LegalTradeMarks', 'OriginalFilename', 'ProductName', 'ProductVersion', 'Comments');
var
Dummy : DWORD;
iLen : DWORD;
pData : PChar;
pVersion : Pointer;
pdwLang : PDWORD;
sLangID : string;
sCharsetID : string;
pValue : PChar;
begin
Result := False;
{ get the size of the size in bytes of the file's version information}
iLen := GetFileVersionInfoSize(PChar(FullPath), Dummy);
if iLen = 0 then Exit;
{ get the information }
pData := StrAlloc(iLen + 1);
if not GetFileVersionInfo(PChar(FullPath), { pointer to filename string }
0, { ignored }
iLen, { size of buffer }
pData) { pointer to buffer to receive file-version info }
then Exit;
{ get the national ID.
retrieve a pointer to an array of language and
character-set identifiers. Use these identifiers
to create the name of a language-specific
structure in the version-information resource}
if not VerQueryValue(pData, { address of buffer for version resource (in)}
'\VarFileInfo\Translation', { address of value to retrieve (in) }
pVersion, { address of buffer for version pointer (out)}
iLen ) { address of version-value length buffer (out)}
then Exit;
{ analyze it }
pdwLang := pVersion;
sLangID := IntToHex(pdwLang^, 8);
sCharsetID := Copy(sLangID, 1, 4);
sLangID := Copy(sLangID, 5, 4);
{ get the info for the requested sub block }
if not VerQueryValue(pData,
PChar('\StringFileInfo\' + sLangID + sCharsetID + '\' + arStringNames[SubBlock]),
pVersion,
iLen)
then Exit;
{ copy it to sValue }
pValue := StrAlloc(iLen + 1);
StrLCopy(pValue, pVersion, iLen);
sValue := String(pValue);
StrDispose(pValue);
Result := True;
end;
{----------------------------------------------------------------------------------
NOTE : this function uses the SearchPath WinAPI call to locate the dll and
then checks up for the version info using the above Get_FileVersionInfo
to get both the version number and the company name.
The dll's UzpVersion function does not check for the CompanyName.
I recommend to call the IsExpectedUnZipDllVersion function as the very
first step to ensure that is the right dll and not any other with a
similar name etc.
This function is more usefull when link the dll dynamically
----------------------------------------------------------------------------------}
function IsExpectedUnZipDllVersion: boolean;
const
DLL_WARNING = 'Cannot find %s.' + #10 +
'The Dll must be in the application directory, the path,' + #10 +
'the Windows directory or the Windows System directory.';
DLL_VERSION_WARNING = '%s has the wrong version number.' + #10 +
'Insure that you have the correct dll''s installed, and that ' + #10 +
'an older dll is not in your path or Windows System directory.';
var
sCompany : string;
sVersion : string;
iRes : DWORD;
pBuffer : array[0..MAX_PATH - 1] of Char;
pFilePart : PChar;
begin
Result := False;
iRes := SearchPath(nil, { address of search path }
PChar(UNZIP_DLL), { address of filename }
'.dll', { address of extension }
MAX_PATH - 1, { size, in characters, of buffer }
pBuffer, { address of buffer for found filename }
pFilePart { address of pointer to file component }
);
if iRes = 0 then raise Exception.CreateFmt(DLL_WARNING, [UNZIP_DLL]);
if Get_FileVersionInfo(String(pBuffer), sbCompanyName, sCompany)
and Get_FileVersionInfo(String(pBuffer), sbFileVersion, sVersion)
then Result := (sCompany = COMPANY_NAME) and (sVersion = UNZIP_DLL_VERSION) ;
if not Result then raise Exception.CreateFmt(DLL_VERSION_WARNING, [UNZIP_DLL]);
end;
end.