Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Purpose:  Implementation of the CLinkSegment class.
       4             :  *
       5             :  ******************************************************************************
       6             :  * Copyright (c) 2009
       7             :  * PCI Geomatics, 90 Allstate Parkway, Markham, Ontario, Canada.
       8             :  *
       9             :  * Permission is hereby granted, free of charge, to any person obtaining a
      10             :  * copy of this software and associated documentation files (the "Software"),
      11             :  * to deal in the Software without restriction, including without limitation
      12             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      13             :  * and/or sell copies of the Software, and to permit persons to whom the
      14             :  * Software is furnished to do so, subject to the following conditions:
      15             :  *
      16             :  * The above copyright notice and this permission notice shall be included
      17             :  * in all copies or substantial portions of the Software.
      18             :  *
      19             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      20             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      21             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      22             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      23             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      24             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      25             :  * DEALINGS IN THE SOFTWARE.
      26             :  ****************************************************************************/
      27             : 
      28             : #include "core/clinksegment.h"
      29             : #include "segment/cpcidsksegment.h"
      30             : #include "core/pcidsk_utils.h"
      31             : #include "pcidsk_exception.h"
      32             : 
      33             : #include <vector>
      34             : #include <string>
      35             : #include <cassert>
      36             : #include <cstring>
      37             : 
      38             : using namespace PCIDSK;
      39             : 
      40           0 : CLinkSegment::CLinkSegment(PCIDSKFile *fileIn,
      41             :                            int segmentIn,
      42           0 :                            const char *segment_pointer) :
      43             :     CPCIDSKSegment(fileIn, segmentIn, segment_pointer),
      44           0 :     loaded_(false), modified_(false)
      45             : {
      46           0 :     Load();
      47           0 : }
      48             : 
      49             : 
      50           0 : CLinkSegment::~CLinkSegment()
      51             : {
      52           0 : }
      53             : 
      54             : // Load the contents of the segment
      55           0 : void CLinkSegment::Load()
      56             : {
      57             :     // Check if we've already loaded the segment into memory
      58           0 :     if (loaded_) {
      59           0 :         return;
      60             :     }
      61             : 
      62           0 :     seg_data.SetSize(data_size < 1024 ? -1 : (int) (data_size - 1024));
      63             : 
      64           0 :     ReadFromFile(seg_data.buffer, 0, data_size - 1024);
      65             : 
      66           0 :     if (seg_data.buffer_size < 8)
      67             :     {
      68           0 :         path.clear();
      69           0 :         return;
      70             :     }
      71             : 
      72           0 :     if (!STARTS_WITH(seg_data.buffer, "SysLinkF"))
      73             :     {
      74           0 :         seg_data.Put("SysLinkF",0,8);
      75           0 :         return;
      76             :     }
      77             : 
      78           0 :     const char * pszEnd = seg_data.buffer + seg_data.buffer_size;
      79           0 :     const char * pszPathStart = seg_data.buffer + 8;
      80           0 :     const char * pszPathEnd = pszPathStart;
      81             : 
      82             :     // Find the end of the path.
      83           0 :     while (pszPathEnd < pszEnd && *pszPathEnd)
      84           0 :         ++pszPathEnd;
      85             : 
      86             :     // Remove trailing spaces.
      87           0 :     while (pszPathEnd > pszPathStart && *pszPathEnd == ' ')
      88           0 :         --pszPathEnd;
      89             : 
      90           0 :     path = std::string(pszPathStart, pszPathEnd);
      91             : 
      92             :     // We've now loaded the structure up with data. Mark it as being loaded
      93             :     // properly.
      94           0 :     loaded_ = true;
      95             : 
      96             : }
      97             : 
      98           0 : void CLinkSegment::Write(void)
      99             : {
     100             :     //We are not writing if nothing was loaded.
     101           0 :     if (!modified_) {
     102           0 :         return;
     103             :     }
     104             : 
     105           0 :     seg_data.Put("SysLinkF",0,8);
     106           0 :     seg_data.Put(path.c_str(), 8, static_cast<int>(path.size()), true);
     107             : 
     108           0 :     WriteToFile(seg_data.buffer, 0, data_size-1024);
     109           0 :     modified_ = false;
     110             : }
     111             : 
     112           0 : std::string CLinkSegment::GetPath(void) const
     113             : {
     114           0 :     return path;
     115             : }
     116             : 
     117           0 : void CLinkSegment::SetPath(const std::string& oPath)
     118             : {
     119           0 :     if(oPath.size() < 504)
     120             :     {
     121           0 :         path = oPath;
     122           0 :         modified_ = true;
     123             :     }
     124             :     else
     125             :     {
     126           0 :         return ThrowPCIDSKException("The size of the path cannot be"
     127           0 :                               " bigger than 504 characters.");
     128             :     }
     129             : }
     130             : 
     131           0 : void CLinkSegment::Synchronize()
     132             : {
     133           0 :     if(modified_)
     134             :     {
     135           0 :         this->Write();
     136             :     }
     137           0 : }
     138             :