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/*
Copyright (C) 2012 George Hazan
This is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this file; see the file license.txt. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "common.h"
extern "C"
{
#include "Minizip\unzip.h"
void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def);
}
bool extractCurrentFile(unzFile uf, TCHAR* ptszDestPath, TCHAR* ptszBackPath)
{
int err = UNZ_OK;
unz_file_info64 file_info;
char filename[MAX_PATH];
char buf[8192];
err = unzGetCurrentFileInfo64(uf, &file_info, filename, sizeof(filename), buf, sizeof(buf), NULL, 0);
if (err != UNZ_OK)
return false;
// Get Unicode file name for InfoZip style archives, otherwise assume PKZip/WinZip style
if (file_info.size_file_extra)
{
char *p = buf;
unsigned long size = min(file_info.size_file_extra, sizeof(buf));
while (size > 0)
{
unsigned short id = *(unsigned short*)p;
unsigned len = *(unsigned short*)(p + 2);
if (size < (len + 4)) break;
if (id == 0x7075 && len > 5 && (len - 5) < sizeof(filename) && *(p + 4) == 1)
{
memcpy(filename, p + 9, len - 5);
filename[len - 5] = 0;
break;
}
size -= len + 4;
p += len + 4;
}
}
TCHAR tszDestFile[MAX_PATH], tszBackFile[MAX_PATH];
TCHAR* p = mir_utf8decodeT(filename);
if (p == NULL)
p = mir_a2t(filename);
mir_sntprintf(tszDestFile, SIZEOF(tszDestFile), _T("%s\\%s"), ptszDestPath, p);
mir_sntprintf(tszBackFile, SIZEOF(tszBackFile), _T("%s\\%s"), ptszBackPath, p);
mir_free(p);
for (p = tszDestFile; *p; ++p) if (*p == '/') *p = '\\';
for (p = tszBackFile; *p; ++p) if (*p == '/') *p = '\\';
CreatePathToFileT(tszDestFile);
CreatePathToFileT(tszBackFile);
if ( !(file_info.external_fa & FILE_ATTRIBUTE_DIRECTORY)) {
err = unzOpenCurrentFile(uf);
if (err != UNZ_OK)
return false;
MoveFile(tszDestFile, tszBackFile);
HANDLE hFile = CreateFile(tszDestFile, GENERIC_WRITE, FILE_SHARE_WRITE, 0,
CREATE_ALWAYS, file_info.external_fa, 0);
if (hFile != INVALID_HANDLE_VALUE) {
while (true) {
err = unzReadCurrentFile(uf, buf, sizeof(buf));
if (err <= 0)
break;
DWORD bytes;
if (!WriteFile(hFile, buf, err, &bytes, FALSE)) {
err = UNZ_ERRNO;
break;
}
}
FILETIME ftLocal, ftCreate, ftLastAcc, ftLastWrite;
GetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
DosDateTimeToFileTime(HIWORD(file_info.dosDate), LOWORD(file_info.dosDate), &ftLocal);
LocalFileTimeToFileTime(&ftLocal, &ftLastWrite);
SetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
CloseHandle(hFile);
unzCloseCurrentFile(uf); /* don't lose the error */
}
}
return true;
}
void unzip(const TCHAR* ptszZipFile, TCHAR* ptszDestPath, TCHAR* ptszBackPath)
{
zlib_filefunc64_def ffunc;
fill_fopen64_filefunc(&ffunc);
unzFile uf = unzOpen2_64(ptszZipFile, &ffunc);
if (uf) {
do {
extractCurrentFile(uf, ptszDestPath, ptszBackPath);
}
while (unzGoToNextFile(uf) == UNZ_OK);
unzClose(uf);
}
}
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