1 /******************************************************************************
2 *
3 * Project: SDTS Translator
4 * Purpose: Implementation of SDTSAttrReader class.
5 * Author: Frank Warmerdam, warmerdam@pobox.com
6 *
7 ******************************************************************************
8 * Copyright (c) 1999, Frank Warmerdam
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 ****************************************************************************/
28
29 #include "sdts_al.h"
30
31 CPL_CVSID("$Id: sdtsattrreader.cpp 7e07230bbff24eb333608de4dbd460b7312839d0 2017-12-11 19:08:47Z Even Rouault $")
32
33 /************************************************************************/
34 /* ==================================================================== */
35 /* SDTSAttrRecord */
36 /* ==================================================================== */
37 /************************************************************************/
38
39 /************************************************************************/
40 /* SDTSAttrRecord() */
41 /************************************************************************/
42
SDTSAttrRecord()43 SDTSAttrRecord::SDTSAttrRecord() :
44 poWholeRecord(nullptr),
45 poATTR(nullptr)
46 {}
47
48 /************************************************************************/
49 /* ~SDTSAttrRecord() */
50 /************************************************************************/
51
~SDTSAttrRecord()52 SDTSAttrRecord::~SDTSAttrRecord()
53
54 {
55 if( poWholeRecord != nullptr )
56 delete poWholeRecord;
57 }
58
59 /************************************************************************/
60 /* Dump() */
61 /************************************************************************/
62
Dump(FILE * fp)63 void SDTSAttrRecord::Dump( FILE * fp )
64
65 {
66 if( poATTR != nullptr )
67 poATTR->Dump( fp );
68 }
69
70 /************************************************************************/
71 /* ==================================================================== */
72 /* SDTSAttrReader */
73 /* */
74 /* This is the class used to read a primary attribute module. */
75 /* ==================================================================== */
76 /************************************************************************/
77
78 /************************************************************************/
79 /* SDTSAttrReader() */
80 /************************************************************************/
81
SDTSAttrReader()82 SDTSAttrReader::SDTSAttrReader() :
83 bIsSecondary(FALSE)
84 {}
85
86 /************************************************************************/
87 /* ~SDTSAttrReader() */
88 /************************************************************************/
89
~SDTSAttrReader()90 SDTSAttrReader::~SDTSAttrReader()
91 {
92 Close();
93 }
94
95 /************************************************************************/
96 /* Close() */
97 /************************************************************************/
98
Close()99 void SDTSAttrReader::Close()
100
101 {
102 ClearIndex();
103 oDDFModule.Close();
104 }
105
106 /************************************************************************/
107 /* Open() */
108 /* */
109 /* Open the requested attr file, and prepare to start reading */
110 /* data records. */
111 /************************************************************************/
112
Open(const char * pszFilename)113 int SDTSAttrReader::Open( const char *pszFilename )
114
115 {
116 bool bSuccess = CPL_TO_BOOL(oDDFModule.Open( pszFilename ));
117
118 if( bSuccess )
119 bIsSecondary = (oDDFModule.FindFieldDefn("ATTS") != nullptr);
120
121 return bSuccess;
122 }
123
124 /************************************************************************/
125 /* GetNextRecord() */
126 /************************************************************************/
127
GetNextRecord(SDTSModId * poModId,DDFRecord ** ppoRecord,int bDuplicate)128 DDFField *SDTSAttrReader::GetNextRecord( SDTSModId * poModId,
129 DDFRecord ** ppoRecord,
130 int bDuplicate )
131
132 {
133 /* -------------------------------------------------------------------- */
134 /* Fetch a record. */
135 /* -------------------------------------------------------------------- */
136 if( ppoRecord != nullptr )
137 *ppoRecord = nullptr;
138
139 if( oDDFModule.GetFP() == nullptr )
140 return nullptr;
141
142 DDFRecord *poRecord = oDDFModule.ReadRecord();
143
144 if( poRecord == nullptr )
145 return nullptr;
146
147 /* -------------------------------------------------------------------- */
148 /* Make a copy of the record for persistent use if requested by */
149 /* the caller. */
150 /* -------------------------------------------------------------------- */
151 if( bDuplicate )
152 poRecord = poRecord->Clone();
153
154 /* -------------------------------------------------------------------- */
155 /* Find the ATTP field. */
156 /* -------------------------------------------------------------------- */
157 DDFField *poATTP = poRecord->FindField( "ATTP", 0 );
158 if( poATTP == nullptr )
159 {
160 poATTP = poRecord->FindField( "ATTS", 0 );
161 }
162
163 if( poATTP == nullptr )
164 return nullptr;
165
166 /* -------------------------------------------------------------------- */
167 /* Update the module ID if required. */
168 /* -------------------------------------------------------------------- */
169 if( poModId != nullptr )
170 {
171 DDFField *poATPR = poRecord->FindField( "ATPR" );
172
173 if( poATPR == nullptr )
174 poATPR = poRecord->FindField( "ATSC" );
175
176 if( poATPR != nullptr )
177 poModId->Set( poATPR );
178 }
179
180 /* -------------------------------------------------------------------- */
181 /* return proper answer. */
182 /* -------------------------------------------------------------------- */
183 if( ppoRecord != nullptr )
184 *ppoRecord = poRecord;
185
186 return poATTP;
187 }
188
189 /************************************************************************/
190 /* GetNextAttrRecord() */
191 /************************************************************************/
192
GetNextAttrRecord()193 SDTSAttrRecord *SDTSAttrReader::GetNextAttrRecord()
194
195 {
196 SDTSModId oModId;
197 DDFRecord *poRawRecord = nullptr;
198
199 DDFField *poATTRField = GetNextRecord( &oModId, &poRawRecord, TRUE );
200
201 if( poATTRField == nullptr )
202 return nullptr;
203
204 SDTSAttrRecord *poAttrRecord = new SDTSAttrRecord();
205
206 poAttrRecord->poWholeRecord = poRawRecord;
207 poAttrRecord->poATTR = poATTRField;
208 memcpy( &(poAttrRecord->oModId), &oModId, sizeof(SDTSModId) );
209
210 return poAttrRecord;
211 }
212