?? zipfile.cpp
字號(hào):
// ZipFile.cpp: implementation of the CZipFile class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "ZipFile.h"
#ifndef VERSIONMADEBY
# define VERSIONMADEBY (0x0) /* platform depedent */
#endif
#define FLAG_LOCALHEADER_OFFSET (0x06)
#define CRC_LOCALHEADER_OFFSET (0x0e)
#define SIZECENTRALHEADER (0x2e) /* 46 */
#ifndef Z_BUFSIZE
#define Z_BUFSIZE (16384)
#endif
#ifndef Z_MAXFILENAMEINZIP
#define Z_MAXFILENAMEINZIP (256)
#endif
#ifndef DEF_MEM_LEVEL
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
#endif
#define SIZEDATA_INDATABLOCK (4096-(4*4))
#define LOCALHEADERMAGIC (0x04034b50)
#define CENTRALHEADERMAGIC (0x02014b50)
#define ENDHEADERMAGIC (0x06054b50)
#define SIZECENTRALHEADER (0x2e) /* 46 */
// it doesn't compile anyway
// const char z_copyright[] =
// " unzip & zip 0.15 Copyright 1998 Gilles Vollant & MFC/C++ revision Copyright 2000 Tadeusz Dracz";
#define ZIP_PARAMERROR (-102)
zip_fileinfo::zip_fileinfo()
{
tmz_date = CTime::GetCurrentTime();
dosDate = internal_fa = external_fa = 0;
}
uLong zip_fileinfo::get_dos_date()
{
if (dosDate)
return dosDate;
uLong year = (uLong)tmz_date.GetYear();
if (year>1980)
year-=1980;
else if (year>80)
year-=80;
return
(uLong) ((tmz_date.GetDay() + 32 * tmz_date.GetMonth() + 512 * year) << 16) |
(tmz_date.GetSecond() / 2 + 32 * tmz_date.GetMinute() + 2048 * (uLong)tmz_date.GetHour());
}
void curfile_info::alloc_central_header()
{
ASSERT(!central_header);
if (size_centralheader)
central_header = new char[size_centralheader];
}
void curfile_info::free_central_header()
{
if (central_header)
{
delete[] central_header;
central_header = NULL;
}
}
curfile_info::curfile_info()
{
buffered_data = new Byte [Z_BUFSIZE];
central_header = NULL;
}
curfile_info::~curfile_info()
{
free_central_header();
delete[] buffered_data;
}
linkedlist_datablock_internal::linkedlist_datablock_internal()
{
next_datablock = NULL;
avail_in_this_block = SIZEDATA_INDATABLOCK;
filled_in_this_block = 0;
data = new unsigned char [SIZEDATA_INDATABLOCK];
}
linkedlist_datablock_internal::~linkedlist_datablock_internal()
{
delete[] data;
}
linkedlist_data::linkedlist_data()
{
first_block = last_block = NULL;
}
linkedlist_data::~linkedlist_data()
{
linkedlist_datablock_internal* b = first_block;
while (b)
{
linkedlist_datablock_internal* a = b->next_datablock;
delete b;
b = a;
}
}
void linkedlist_data::add_data_in_datablock(char* buf, uLong len)
{
if (!last_block)
first_block = last_block = new linkedlist_datablock_internal;
linkedlist_datablock_internal* ldi = last_block;
while (len>0)
{
uInt copy_this;
unsigned char* to_copy;
if (ldi->avail_in_this_block == 0)
{
ldi->next_datablock = new linkedlist_datablock_internal;
ldi = ldi->next_datablock ;
last_block = ldi;
}
if (ldi->avail_in_this_block < len)
copy_this = (uInt)ldi->avail_in_this_block;
else
copy_this = (uInt)len;
to_copy = &(ldi->data[ldi->filled_in_this_block]);
memcpy(to_copy, buf, copy_this);
ldi->filled_in_this_block += copy_this;
ldi->avail_in_this_block -= copy_this;
buf += copy_this ;
len -= copy_this;
}
}
int linkedlist_data::write_datablock(CFile & f)
{
linkedlist_datablock_internal* ldi;
ldi = first_block;
int size = 0;
while (ldi)
{
if (ldi->filled_in_this_block > 0)
f.Write(ldi->data, (uInt)ldi->filled_in_this_block);
size += ldi->filled_in_this_block;
ldi = ldi->next_datablock;
}
return size;
}
zip_internal::zip_internal()
{
in_opened_file_inzip = 0;
ci.stream_initialised = 0;
number_entry = 0;
}
zip_internal::~zip_internal()
{
}
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CZipFile::CZipFile()
{
m_pFile = &zi.filezip;
}
CZipFile::CZipFile(LPCTSTR pathname, bool append)
{
m_pFile = &zi.filezip;
Open(pathname, append);
}
void CZipFile::Open(LPCTSTR pathname, bool append)
{
if (!IsClosed())
return;
CFileException* e = new CFileException;
if (!zi.filezip.Open(pathname, (append ? CFile::modeNoTruncate : CFile::modeCreate)|CFile::modeWrite | CFile::shareDenyWrite, e))
throw e;
e->Delete();
zi.filezip.SeekToEnd();
zi.begin_pos = zi.filezip.GetPosition();
}
CZipFile::~CZipFile()
{
// Close(); // cannot be here: if an exception is thrown strange things can happen
}
/* ===========================================================================
Outputs a long in LSB order to the given file
nbByte == 1, 2 or 4 (byte, short or long)
*/
void CZipFile::ziplocal_putValue(uLong x, int nbByte)
{
unsigned char buf[4];
int n;
for (n = 0; n < nbByte; n++) {
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
zi.filezip.Write(buf, nbByte);
}
void CZipFile::ziplocal_putValue_inmemory(Byte dest, uLong x, int nbByte)
{
unsigned char* buf=(unsigned char*)zi.ci.central_header + dest;
int n;
for (n = 0; n < nbByte; n++)
{
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
}
//
void CZipFile::OpenNewFileInZip (CString filename,
zip_fileinfo& zipfi,
int level,
CString comment,
const void* extrafield_local,
uInt size_extrafield_local,
const void* extrafield_global,
uInt size_extrafield_global,
int method)
{
if ((method != Z_DEFLATED) || (!level))
ThrowError(ZIP_PARAMERROR);
if (zi.in_opened_file_inzip == 1)
CloseFileInZip();
if (filename.IsEmpty())
filename = "-";
zi.ci.dosDate = zipfi.get_dos_date();
zi.ci.flag = 0;
if ((level == 8) || (level == 9))
zi.ci.flag |= 2;
if (level == 2)
zi.ci.flag |= 4;
if (level == 1)
zi.ci.flag |= 6;
zi.ci.crc32 = 0;
zi.ci.method = method;
zi.ci.stream_initialised = 0;
zi.ci.pos_in_buffered_data = 0;
zi.ci.pos_local_header = zi.filezip.GetPosition();
zi.ci.size_centralheader = SIZECENTRALHEADER + filename.GetLength() +
size_extrafield_global + comment.GetLength();
zi.ci.alloc_central_header();
ziplocal_putValue_inmemory(0, (uLong)CENTRALHEADERMAGIC,4);
/* version info */
ziplocal_putValue_inmemory(4,(uLong)VERSIONMADEBY,2);
ziplocal_putValue_inmemory(6,(uLong)20, 2);
ziplocal_putValue_inmemory(8,(uLong)zi.ci.flag,2);
ziplocal_putValue_inmemory(10,(uLong)zi.ci.method,2);
ziplocal_putValue_inmemory(12,(uLong)zi.ci.dosDate,4);
ziplocal_putValue_inmemory(16,(uLong)0, 4); /*crc*/
ziplocal_putValue_inmemory(20,(uLong)0, 4); /*compr size*/
ziplocal_putValue_inmemory(24,(uLong)0, 4); /*uncompr size*/
ziplocal_putValue_inmemory(28,(uLong)filename.GetLength(), 2);
ziplocal_putValue_inmemory(30,(uLong)size_extrafield_global,2);
ziplocal_putValue_inmemory(32,(uLong)comment.GetLength(), 2);
ziplocal_putValue_inmemory(34,(uLong)0, 2); /*disk nm start*/
ziplocal_putValue_inmemory(36,(uLong)zipfi.internal_fa, 2);
ziplocal_putValue_inmemory(38,(uLong)zipfi.external_fa, 4);
ziplocal_putValue_inmemory(42,(uLong)zi.ci.pos_local_header, 4);
char* pDest = zi.ci.central_header + SIZECENTRALHEADER;
memcpy(pDest, (LPCTSTR)filename, filename.GetLength());
pDest += filename.GetLength();
memcpy(pDest, extrafield_global, size_extrafield_global);
pDest += size_extrafield_global;
memcpy(pDest, (LPCTSTR)comment, comment.GetLength());
/* write the local header */
ziplocal_putValue((uLong)LOCALHEADERMAGIC, 4);
ziplocal_putValue((uLong)20, 2);/* version needed to extract */
ziplocal_putValue((uLong)zi.ci.flag, 2);
ziplocal_putValue((uLong)zi.ci.method, 2);
ziplocal_putValue((uLong)zi.ci.dosDate, 4);
ziplocal_putValue((uLong)0, 4); /* crc 32, unknown */
ziplocal_putValue((uLong)0, 4); /* compressed size, unknown */
ziplocal_putValue((uLong)0, 4); /* uncompressed size, unknown */
ziplocal_putValue((uLong)filename.GetLength(), 2);
ziplocal_putValue((uLong)size_extrafield_local, 2);
zi.filezip.Write(filename, filename.GetLength());
if (size_extrafield_local > 0)
zi.filezip.Write(extrafield_local, size_extrafield_local);
zi.ci.stream.avail_in = (uInt)0;
zi.ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi.ci.stream.next_out = zi.ci.buffered_data;
zi.ci.stream.total_in = 0;
zi.ci.stream.total_out = 0;
if ((zi.ci.method == Z_DEFLATED))
{
zi.ci.stream.zalloc = (alloc_func)myalloc;
zi.ci.stream.zfree = (free_func)myfree;
zi.ci.stream.opaque = m_bDetectZlibMemoryLeaks ? &m_list : 0;
int err = deflateInit2(&zi.ci.stream, level,
Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
CheckForError(err);
zi.ci.stream_initialised = 1;
}
zi.in_opened_file_inzip = 1;
}
void CZipFile::WriteInFileInZip(const void *buf, UINT len)
{
if (zi.in_opened_file_inzip == 0)
ThrowError(ZIP_PARAMERROR);
zi.ci.stream.next_in = (unsigned char*)buf;
zi.ci.stream.avail_in = len;
zi.ci.crc32 = crc32(zi.ci.crc32, (unsigned char*)buf, len);
int err = Z_OK;
while ((err == Z_OK) && (zi.ci.stream.avail_in > 0))
{
if (zi.ci.stream.avail_out == 0)
{
zi.filezip.Write(zi.ci.buffered_data, zi.ci.pos_in_buffered_data);
zi.ci.pos_in_buffered_data = 0;
zi.ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi.ci.stream.next_out = zi.ci.buffered_data;
}
if (zi.ci.method == Z_DEFLATED)
{
uLong uTotalOutBefore = zi.ci.stream.total_out;
err = deflate(&zi.ci.stream, Z_NO_FLUSH);
zi.ci.pos_in_buffered_data += (uInt)(zi.ci.stream.total_out - uTotalOutBefore) ;
}
else
{
uInt copy_this;
if (zi.ci.stream.avail_in < zi.ci.stream.avail_out)
copy_this = zi.ci.stream.avail_in;
else
copy_this = zi.ci.stream.avail_out;
memcpy(zi.ci.stream.next_out, zi.ci.stream.next_in, copy_this);
zi.ci.stream.avail_in -= copy_this;
zi.ci.stream.avail_out -= copy_this;
zi.ci.stream.next_in += copy_this;
zi.ci.stream.next_out += copy_this;
zi.ci.stream.total_in += copy_this;
zi.ci.stream.total_out += copy_this;
zi.ci.pos_in_buffered_data += copy_this;
}
}
CheckForError(err);
}
void CZipFile::CloseFileInZip()
{
if (zi.in_opened_file_inzip == 0)
return;
int err = Z_OK;
zi.ci.stream.avail_in = 0;
if (zi.ci.method == Z_DEFLATED)
while (err == Z_OK)
{
uLong uTotalOutBefore;
if (zi.ci.stream.avail_out == 0)
{
zi.filezip.Write(zi.ci.buffered_data, zi.ci.pos_in_buffered_data);
zi.ci.pos_in_buffered_data = 0;
zi.ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi.ci.stream.next_out = zi.ci.buffered_data;
}
uTotalOutBefore = zi.ci.stream.total_out;
err = deflate(&zi.ci.stream, Z_FINISH);
zi.ci.pos_in_buffered_data += (uInt)(zi.ci.stream.total_out - uTotalOutBefore) ;
}
if (err == Z_STREAM_END)
err = Z_OK; /* this is normal */
CheckForError(err);
if (zi.ci.pos_in_buffered_data > 0)
zi.filezip.Write(zi.ci.buffered_data, zi.ci.pos_in_buffered_data);
if (zi.ci.method == Z_DEFLATED)
{
err = deflateEnd(&zi.ci.stream);
zi.ci.stream_initialised = 0;
}
CheckForError(err);
ziplocal_putValue_inmemory(16, (uLong)zi.ci.crc32, 4); /*crc*/
ziplocal_putValue_inmemory(20, (uLong)zi.ci.stream.total_out, 4); /*compr size*/
ziplocal_putValue_inmemory(24, (uLong)zi.ci.stream.total_in, 4); /*uncompr size*/
zi.central_dir.add_data_in_datablock(zi.ci.central_header, (uLong)zi.ci.size_centralheader);
zi.ci.free_central_header();
long cur_pos_inzip = zi.filezip.GetPosition();
zi.filezip.Seek(zi.ci.pos_local_header + 14, CFile::begin);
ziplocal_putValue((uLong)zi.ci.crc32, 4); /* crc 32, unknown */
ziplocal_putValue((uLong)zi.ci.stream.total_out, 4);/* compressed size, unknown */
ziplocal_putValue((uLong)zi.ci.stream.total_in, 4); /* uncompressed size, unknown */
zi.filezip.Seek(cur_pos_inzip, CFile::begin);
zi.number_entry++;
zi.in_opened_file_inzip = 0;
}
void CZipFile::Close(CString global_comment)
{
if (IsClosed())
return;
if (zi.in_opened_file_inzip == 1)
CloseFileInZip ();
uLong centraldir_pos_inzip = zi.filezip.GetPosition();
uLong size_centraldir = zi.central_dir.write_datablock(zi.filezip);
/* Magic End */
ziplocal_putValue((uLong)ENDHEADERMAGIC, 4);
ziplocal_putValue((uLong)0, 2);/* number of this disk */
ziplocal_putValue((uLong)0, 2);/* number of the disk with the start of the central directory */
ziplocal_putValue((uLong)zi.number_entry, 2);/* total number of entries in the central dir on this disk */
ziplocal_putValue((uLong)zi.number_entry,2);/* total number of entries in the central dir */
ziplocal_putValue((uLong)size_centraldir,4);/* size of the central directory */
ziplocal_putValue((uLong)centraldir_pos_inzip ,4);/* offset of start of central directory with respect to the starting disk number */
ziplocal_putValue((uLong)global_comment.GetLength(), 2);/* zipfile comment length */
if (!global_comment.IsEmpty())
zi.filezip.Write(global_comment, global_comment.GetLength());
zi.filezip.Close();
}
void CZipFile::UpdateZipInfo(zip_fileinfo &zi, CFile &f)
{
CFileStatus fs;
f.GetStatus(fs);
zi.tmz_date = fs.m_mtime;
zi.external_fa = ::GetFileAttributes(f.GetFilePath()); // mfc bug: m_attribute is 1-byte
}
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