1 : /******************************************************************************
2 : *
3 : * Purpose: Implementation of the CLinkSegment class.
4 : *
5 : ******************************************************************************
6 : * Copyright (c) 2009
7 : * PCI Geomatics, 50 West Wilmot Street, Richmond Hill, Ont, 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 : #include <algorithm>
38 : #include <functional>
39 :
40 : using namespace PCIDSK;
41 :
42 0 : CLinkSegment::CLinkSegment(PCIDSKFile *file,
43 : int segment,
44 : const char *segment_pointer) :
45 : CPCIDSKSegment(file, segment, segment_pointer),
46 0 : loaded_(false), modified_(false)
47 : {
48 0 : Load();
49 0 : }
50 :
51 :
52 0 : CLinkSegment::~CLinkSegment()
53 : {
54 0 : }
55 :
56 : // Load the contents of the segment
57 0 : void CLinkSegment::Load()
58 : {
59 : // Check if we've already loaded the segment into memory
60 0 : if (loaded_) {
61 0 : return;
62 : }
63 :
64 0 : assert(data_size - 1024 == 1 * 512);
65 :
66 0 : seg_data.SetSize(data_size - 1024); // should be 1 * 512
67 :
68 0 : ReadFromFile(seg_data.buffer, 0, data_size - 1024);
69 :
70 0 : if (std::strncmp(seg_data.buffer, "SysLinkF", 8))
71 : {
72 0 : seg_data.Put("SysLinkF",0,8);
73 0 : return;
74 : }
75 :
76 0 : path = std::string(&seg_data.buffer[8]);
77 : std::string::reverse_iterator first_non_space =
78 : std::find_if(path.rbegin(), path.rend(),
79 0 : std::bind2nd(std::not_equal_to<char>(), ' '));
80 :
81 0 : *(--first_non_space) = '\0';
82 :
83 :
84 : // We've now loaded the structure up with data. Mark it as being loaded
85 : // properly.
86 0 : loaded_ = true;
87 :
88 : }
89 :
90 0 : void CLinkSegment::Write(void)
91 : {
92 : //We are not writing if nothing was loaded.
93 0 : if (!modified_) {
94 0 : return;
95 : }
96 :
97 0 : seg_data.Put("SysLinkF",0,8);
98 0 : seg_data.Put(path.c_str(), 8, path.size(), true);
99 :
100 0 : WriteToFile(seg_data.buffer, 0, data_size-1024);
101 0 : modified_ = false;
102 : }
103 :
104 0 : std::string CLinkSegment::GetPath(void) const
105 : {
106 0 : return path;
107 : }
108 :
109 0 : void CLinkSegment::SetPath(const std::string& oPath)
110 : {
111 0 : if(oPath.size() < 504)
112 : {
113 0 : path = oPath;
114 0 : modified_ = true;
115 : }
116 : else
117 : {
118 : throw PCIDSKException("The size of the path cannot be"
119 0 : " bigger than 504 characters.");
120 : }
121 0 : }
122 :
123 0 : void CLinkSegment::Synchronize()
124 : {
125 0 : if(modified_)
126 : {
127 0 : this->Write();
128 : }
129 0 : }
130 :
|
