intrface.cpp

zip压缩

         if (g_pExtractInfo->fExtract && *efn) {

            // Make sure the user is aware that this file is screwed.
            SendMessage(g_hWndMain, WM_PRIVATE, MSG_ADD_TEXT_TO_EDIT,
                        (LPARAM)"warning: ");
            SendMessage(g_hWndMain, WM_PRIVATE, MSG_ADD_TEXT_TO_EDIT,
                        (LPARAM)efn);
            SendMessage(g_hWndMain, WM_PRIVATE, MSG_ADD_TEXT_TO_EDIT,
                        (LPARAM)" is probably truncated.\n");
         }
      }

      // Display an aborted message in the log
      SendMessage(g_hWndMain, WM_PRIVATE, MSG_ADD_TEXT_TO_EDIT,
                  (LPARAM)"Operation aborted by user.\n");

      // Signal "Immediate Cancel" back to the UnZip engine.
      rval = UZ_ST_BREAK;
   }

   return rval;
}

//******************************************************************************
int WINAPI UzpReplace(LPSTR szFile) {
   // Pass control to our GUI thread which will prompt the user to overwrite.
   return SendMessage(g_hWndMain, WM_PRIVATE, MSG_PROMPT_TO_REPLACE, (LPARAM)szFile);
}

//******************************************************************************
void WINAPI UzpSound(void) {
   // Do nothing.
}

//******************************************************************************
// Called from LIST.C
void WINAPI SendAppMsg(ulg dwSize, ulg dwCompressedSize, unsigned ratio,
                       unsigned month, unsigned day, unsigned year,
                       unsigned hour, unsigned minute, char uppercase,
                       LPSTR szPath, LPSTR szMethod, ulg dwCRC, char chCrypt)
{
   // If we are out of memory, then just bail since we will only make things worse.
   if (g_fOutOfMemory) {
      return;
   }

   // We get our Globals structure and then retrieve the real file name.
   GETGLOBALS();
   szPath = pG->filename;

   // Allocate a FILE_NODE large enough to hold this file.
   int length = strlen(szPath) + strlen(szMethod);
   g_pFileLast = (FILE_NODE*)new BYTE[sizeof(FILE_NODE) + (sizeof(TCHAR) * length)];

   // Bail out if we failed to allocate the node.
   if (!g_pFileLast) {
#ifdef UNICODE
      DebugOut(TEXT("Failed to create a FILE_NODE for \"%S\"."), szPath);
#else
      DebugOut(TEXT("Failed to create a FILE_NODE for \"%s\"."), szPath);
#endif
      g_fOutOfMemory = TRUE;
      return;
   }

   // Fill in our node.
   g_pFileLast->dwSize           = dwSize;
   g_pFileLast->dwCompressedSize = dwCompressedSize;
   g_pFileLast->dwCRC            = dwCRC;
   g_pFileLast->szComment        = NULL;
   g_pFileLast->szType           = NULL;

   // Fix the year value to contain the real year.
   year += 1900;

   // Year:   0 - 4095 (12) 1111 1111 1111 0000 0000 0000 0000 0000 (0xFFF00000)
   // Month:  1 -   12 ( 4) 0000 0000 0000 1111 0000 0000 0000 0000 (0x000F0000)
   // Day:    1 -   31 ( 5) 0000 0000 0000 0000 1111 1000 0000 0000 (0x0000F800)
   // Hour:   0 -   23 ( 5) 0000 0000 0000 0000 0000 0111 1100 0000 (0x000007C0)
   // Minute: 0 -   59 ( 6) 0000 0000 0000 0000 0000 0000 0011 1111 (0x0000003F)

   // Do some bit shifting to make the date and time fit in a DWORD.
   g_pFileLast->dwModified = (((DWORD)(year   & 0x0FFF) << 20) |
                              ((DWORD)(month  & 0x000F) << 16) |
                              ((DWORD)(day    & 0x001F) << 11) |
                              ((DWORD)(hour   & 0x001F) <<  6) |
                              ((DWORD)(minute & 0x003F)));

   // We need to get our globals structure to determine our attributes and
   // encryption information.
   g_pFileLast->dwAttributes = (pG->crec.external_file_attributes & 0xFF);
   if (chCrypt == 'E') {
      g_pFileLast->dwAttributes |= ZFILE_ATTRIBUTE_ENCRYPTED;
   }

   // Store the path and method in our string buffer.
   strcpy(g_pFileLast->szPathAndMethod, szPath);
   strcpy(g_pFileLast->szPathAndMethod + strlen(szPath) + 1, szMethod);

   // Pass the file object to our windows code to have it added to our list.
   AddFileToListView(g_pFileLast);
}

//******************************************************************************
int win_fprintf(zvoid *pG, FILE *file, unsigned int dwCount, char far *buffer)
{

   // win_fprintf() is used within Info-ZIP to write to a file as well as log
   // information.  If the "file" is a real file handle (not stdout or stderr),
   // then we write the data to the file and return.

   if ((file != stdout) && (file != stderr)) {

      DWORD dwBytesWriten = 0;
#ifdef _WIN32_WCE
      // On WinCE all FILEs are really HANDLEs.  See WINCE.CPP for more info.
      WriteFile((HANDLE)file, buffer, dwCount, &dwBytesWriten, NULL);
#else
      dwBytesWriten = fwrite(buffer, 1, dwCount, file);
#endif

      // Update our bytes written count.
      g_pExtractInfo->dwBytesWrittenThisFile += dwBytesWriten;

      // Pass control to our GUI thread to do a partial update our progress dialog.
      SendMessage(g_hWndMain, WM_PRIVATE, MSG_UPDATE_PROGRESS_PARTIAL,
                  (LPARAM)g_pExtractInfo);

      return dwBytesWriten;
   }

   // Check to see if we are expecting a extraction progress string
   if (g_pExtractInfo) {

      // Most of our progress strings come to our UzpMessagePrnt2() callback,
      // but we occasionally get one here.  We will just forward it to
      // UzpMessagePrnt2() as if it never came here.
      UzpMessagePrnt2(pG, (uch*)buffer, dwCount, 0);
      return dwCount;
   }

   // Check to see if we are expecting a zip file comment string.
   if (g_hWndEdit) {

      // Change all forward slashes to back slashes in the buffer
      ForwardSlashesToBackSlashesA((LPSTR)buffer);

      SendMessage(g_hWndMain, WM_PRIVATE, MSG_ADD_TEXT_TO_EDIT, (LPARAM)buffer);
      return dwCount;
   }

   // Check to see if we are expecting a compressed file comment string.
   if (g_pFileLast) {

      // Calcalute the size of the buffer we will need to store this comment.
      // We are going to convert all ASC values 0 - 31 (except tab, new line,
      // and CR) to ^char.
      int size = 1;
      for (char *p2, *p1 = buffer; *p1; INCSTR(p1)) {
         size += ((*p1 >= 32) || (*p1 == '\t') ||
                  (*p1 == '\r') || (*p1 == '\n')) ? CLEN(p1) : 2;
      }

      // Allocate a comment buffer and assign it to the last file node we saw.
      if (g_pFileLast->szComment = new CHAR[size]) {

         // Copy while formatting.
         for (p1 = buffer, p2 = (char*)g_pFileLast->szComment; *p1; INCSTR(p1)) {
            if ((*p1 >= 32) || (*p1 == '\t') ||
                (*p1 == '\r') || (*p1 == '\n')) {
               memcpy(p2, p1, CLEN(p1));
               p2 += CLEN(p1);
            } else {
               *(p2++) = '^';
               *(p2++) = 64 + *p1;
            }
         }
         *p2 = '\0';
      }

      // Update the attributes of the file node to include the comment attribute.
      g_pFileLast->dwAttributes |= ZFILE_ATTRIBUTE_COMMENT;

      // Clear the file node so we don't try to add another bogus comment to it.
      g_pFileLast = NULL;

      return dwCount;
   }

   if (dwCount >= _MAX_PATH) {
      buffer[_MAX_PATH] = '\0';
   }
#ifdef UNICODE
   DebugOut(TEXT("Unhandled call to win_fprintf(\"%S\")"), buffer);
#else
   DebugOut(TEXT("Unhandled call to win_fprintf(\"%S\")"), buffer);
#endif
   return dwCount;
}

//******************************************************************************
void WINAPI Wiz_NoPrinting(int f) {
   // Do nothing.
}


//******************************************************************************
//***** Functions that Info-ZIP expects the port to write and export.
//***** Some of this code was stolen from the WIN32 port and highly modified.
//******************************************************************************

int mapattr(Uz_Globs *pG) {

   // Check to see if we are extracting this file for viewing.  Currently, we do
   // this by checking the szMappedPath member of our extract info stucture
   // since we know OnActionView() is the only one who sets this member.

   if (g_pExtractInfo && g_pExtractInfo->szMappedPath) {

      // If we are extracting for view only, then we ignore the file's real
      // attributes and force the file to create as read-only.  We make the file
      // read-only to help prevent the user from making changes to the temporary
      // file and then trying to save the changes back to a file that we will
      // eventually delete.
      pG->pInfo->file_attr = FILE_ATTRIBUTE_READONLY;

   } else {

      // Store the attribute exactly as it appears for normal extraction/test.
      pG->pInfo->file_attr = (unsigned)pG->crec.external_file_attributes & 0xff;
   }
   return PK_OK;
}

//******************************************************************************
void utimeToFileTime(time_t ut, FILETIME *pft, BOOL fOldFileSystem) {

   // time_t    is a 32-bit value for the seconds since January 1, 1970
   // FILETIME  is a 64-bit value for the number of 100-nanosecond intervals since
   //           January 1, 1601
   // DWORDLONG is a 64-bit int that we can use to perform large math operations.


   // time_t has minimum of 1/1/1970.  Many file systems, such as FAT, have a
   // minimum date of 1/1/1980.  If extracting to one of those file systems and
   // out time_t is less than 1980, then we make it 1/1/1980.
   // (365 days/yr * 10 yrs + 3 leap yr days) * (60 secs * 60 mins * 24 hrs).
   if (fOldFileSystem && (ut < 0x12CFF780)) {
      ut = 0x12CFF780;
   }

   // Compute the FILETIME for the given time_t.
   DWORDLONG dwl = ((DWORDLONG)116444736000000000 +
                   ((DWORDLONG)ut * (DWORDLONG)10000000));

   // Store the return value.
   *pft = *(FILETIME*)&dwl;

   // Now for the next fix for old file systems.  If we are in Daylight Savings
   // Time (DST) and the file is not in DST, then we need subtract off the DST
   // bias from the filetime.  This is due to a bug in Windows (NT, CE, and 95)
   // that causes the DST bias to be added to all file times when the system
   // is in DST, even if the file is not in DST.  This only effects old file
   // systems since they store local times instead of UTC times.  Newer file
   // systems like NTFS and CEFS store UTC times.

   if (fOldFileSystem) {

      // We use the CRT's localtime() and Win32's FileTimeToLocalTime()
      // functions to compute the DST bias.  This works because localtime()
      // correctly adds the DST bias only if the file time is in DST.
      // FileTimeToLocalTime() always adds the DST bias to the time.
      // Therefore, if the functions return different results, we know we
      // are dealing with a non-DST file during a system DST.

      FILETIME ftCRT, ftWin32;

      // Get the CRT result - result is a "tm" struct.
      struct tm *ptmCRT = localtime(&ut);

      // Convert the "tm" struct to a FILETIME.
      SYSTEMTIME stCRT;
      ZeroMemory(&stCRT, sizeof(stCRT));
      stCRT.wYear   = ptmCRT->tm_year + 1900;
      stCRT.wMonth  = ptmCRT->tm_mon + 1;
      stCRT.wDay    = ptmCRT->tm_mday;
      stCRT.wHour   = ptmCRT->tm_hour;
      stCRT.wMinute = ptmCRT->tm_min;
      stCRT.wSecond = ptmCRT->tm_sec;
      SystemTimeToFileTime(&stCRT, &ftCRT);

      // Get the Win32 result - result is a FILETIME.
      if (FileTimeToLocalFileTime(pft, &ftWin32)) {

         // Subtract the difference from our current filetime.
         *(DWORDLONG*)pft -= *(DWORDLONG*)&ftWin32 - *(DWORDLONG*)&ftCRT;
      }
   }
}

//******************************************************************************
int GetFileTimes(Uz_Globs *pG, FILETIME *pftCreated, FILETIME *pftAccessed,
                 FILETIME *pftModified)
{
   // We need to check to see if this file system is limited.  This includes
   // FAT, VFAT, and HPFS.  It does not include NTFS and CEFS.  The limited
   // file systems can not support dates < 1980 and they store file local times
   // for files as opposed to UTC times.
   BOOL fOldFileSystem = IsOldFileSystem(pG->filename);

#ifdef USE_EF_UT_TIME  // Always true for WinCE build

#ifdef IZ_CHECK_TZ
   if (pG->extra_field && pG->tz_is_valid) {
#else
   if (pG->extra_field) {
#endif

      // Structure for Unix style actime, modtime, creatime
      iztimes z_utime;

      // Get any date/time we can.  This can return 0 to 3 unix time fields.
      unsigned eb_izux_flg = ef_scan_for_izux(pG->extra_field,
                                              pG->lrec.extra_field_length, 0,
                                              pG->lrec.last_mod_dos_datetime,
                                              &z_utime, NULL);

      // We require at least a modified time.
      if (eb_izux_flg & EB_UT_FL_MTIME) {

         // We know we have a modified time, so get it first.
         utimeToFileTime(z_utime.mtime, pftModified, fOldFileSystem);

         // Get the accessed time if we have one.
         if (eb_izux_flg & EB_UT_FL_ATIME) {
            utimeToFileTime(z_utime.atime, pftAccessed, fOldFileSystem);
         }

         // Get the created time if we have one.
         if (eb_izux_flg & EB_UT_FL_CTIME) {
            utimeToFileTime(z_utime.ctime, pftCreated, fOldFileSystem);
         }

         // Return our flags.
         return (int)eb_izux_flg;
      }
   }

#endif // USE_EF_UT_TIME

   // If all else fails, we can resort to using the DOS date and time data.
   time_t ux_modtime = dos_to_unix_time(G.lrec.last_mod_dos_datetime);
   utimeToFileTime(ux_modtime, pftModified, fOldFileSystem);

   *pftAccessed = *pftModified;

   return (EB_UT_FL_MTIME | EB_UT_FL_ATIME);
}

//******************************************************************************
int SetFileSize(FILE *file, ulg filesize)
{
#if (defined(_WIN32_WCE) || defined(__RSXNT__))
    // For native Windows CE, it is not known whether the API supports
    // presetting a file's size.
    // RSXNT environment lacks a translation function from C file pointer
    // to Win32-API file handle.
    // So, simply do nothing.
    return 0;
#else /* !(_WIN32_WCE || __RSXNT__) */
    /* not yet verified, if that really creates an unfragmented file
      [e-mail]
     */
    HANDLE os_fh;

    /* Win9x supports FAT file system, only; presetting file size does
       not help to prevent fragmentation. */
    if ((long)GetVersion() < 0) return 0;

    /* Win32-API calls require access to the Win32 file handle.
       The interface function used to retrieve the Win32 handle for
       a file opened by the C rtl is non-standard and may not be
       available for every Win32 compiler environment.
       (see also win32/win32.c of the Zip distribution)
     */
    os_fh = (HANDLE)_get_osfhandle(fileno(file));
    /* move file pointer behind the last byte of the expected file size */
    if (SetFilePointer(os_fh, filesize, 0, FILE_BEGIN) == 0xFFFFFFFF)
        return -1;
    /* extend/truncate file to the current position */
    if (SetEndOfFile(os_fh) == 0)
        return -1;
    /* move file position pointer back to the start of the file! */
    return (SetFilePointer(os_fh, 0, 0, FILE_BEGIN) == 0xFFFFFFFF) ? -1 : 0;
#endif /* ?(_WIN32_WCE || __RSXNT__) */
} /* end function SetFileSize() */

//******************************************************************************
void close_outfile(Uz_Globs *pG) {

   // Get the 3 time stamps for the file.
   FILETIME ftCreated, ftAccessed, ftModified;
   int timeFlags = GetFileTimes(pG, &ftCreated, &ftAccessed, &ftModified);

   TCHAR szFile[_MAX_PATH];
   MBSTOTSTR(szFile, pG->filename, countof(szFile));

#ifdef _WIN32_WCE

   // Cast the outfile to a HANDLE (since that is really what it is), and