mirror of
https://github.com/qgis/QGIS.git
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291 lines
7.1 KiB
C++
291 lines
7.1 KiB
C++
/******************************************************************************
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** libDXFrw - Library to read/write DXF files (ascii & binary) **
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** **
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** Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com **
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** **
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** This library is free software, licensed under the terms of the GNU **
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** General Public License as published by the Free Software Foundation, **
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** either version 2 of the License, or (at your option) any later version. **
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** You should have received a copy of the GNU General Public License **
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** along with this program. If not, see <http://www.gnu.org/licenses/>. **
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******************************************************************************/
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// uncomment to get detailed debug output on DWG read. Caution: this option makes DWG import super-slow!
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// #define DWGDEBUG 1
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#include <cstdlib>
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#include <fstream>
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#include <string>
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#include <sstream>
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#include "dxfreader.h"
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#include "drw_textcodec.h"
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#include "drw_dbg.h"
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bool dxfReader::readRec( int *codeData )
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{
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// std::string text;
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int code;
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if ( !readCode( &code ) )
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return false;
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*codeData = code;
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if ( code < 10 )
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readString();
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else if ( code < 60 )
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readDouble();
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else if ( code < 80 )
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readInt16();
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else if ( code > 89 && code < 100 ) //TODO this is an int 32b
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readInt32();
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else if ( code == 100 || code == 102 || code == 105 )
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readString();
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else if ( code > 109 && code < 150 ) //skip not used at the v2012
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readDouble();
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else if ( code > 159 && code < 170 ) //skip not used at the v2012
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readInt64();
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else if ( code < 180 )
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readInt16();
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else if ( code > 209 && code < 240 ) //skip not used at the v2012
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readDouble();
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else if ( code > 269 && code < 290 ) //skip not used at the v2012
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readInt16();
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else if ( code < 300 ) //TODO this is a boolean indicator, int in Binary?
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readBool();
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else if ( code < 370 )
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readString();
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else if ( code < 390 )
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readInt16();
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else if ( code < 400 )
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readString();
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else if ( code < 410 )
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readInt16();
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else if ( code < 420 )
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readString();
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else if ( code < 430 ) //TODO this is an int 32b
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readInt32();
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else if ( code < 440 )
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readString();
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else if ( code < 450 ) //TODO this is an int 32b
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readInt32();
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else if ( code < 460 ) //TODO this is long??
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readInt32();
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else if ( code < 470 ) //TODO this is a floating point double precision??
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readDouble();
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else if ( code < 481 )
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readString();
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else if ( code > 998 && code < 1009 ) //skip not used at the v2012
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readString();
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else if ( code < 1060 ) //TODO this is a floating point double precision??
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readDouble();
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else if ( code < 1071 )
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readInt16();
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else if ( code == 1071 ) //TODO this is an int 32b
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readInt32();
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else if ( skip )
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//skip safely this dxf entry ( OK for ascii dxf)
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readString();
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else
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//break in binary files because the conduct is unpredictable
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return false;
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return filestr->good();
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}
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int dxfReader::getHandleString()
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{
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int res;
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#if defined(__APPLE__)
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int Succeeded = sscanf( strData.c_str(), "%x", &res );
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if ( !Succeeded || Succeeded == EOF )
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res = 0;
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#else
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std::istringstream Convert( strData );
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if ( !( Convert >> std::hex >> res ) )
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res = 0;
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#endif
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return res;
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}
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bool dxfReaderBinary::readCode( int *code )
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{
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unsigned short *int16p;
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char buffer[2];
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filestr->read( buffer, 2 );
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int16p = ( unsigned short * ) buffer;
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//exist a 32bits int (code 90) with 2 bytes???
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if ( ( *code == 90 ) && ( *int16p > 2000 ) )
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{
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DRW_DBG(*code); DRW_DBG(" de 16bits\n");
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filestr->seekg( -4, std::ios_base::cur );
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filestr->read( buffer, 2 );
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int16p = ( unsigned short * ) buffer;
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}
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*code = *int16p;
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DRW_DBG(*code); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readString()
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{
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type = STRING;
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std::getline( *filestr, strData, '\0' );
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DRW_DBG(strData); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readString( std::string *text )
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{
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type = STRING;
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std::getline( *filestr, *text, '\0' );
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DRW_DBG(*text); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readInt16()
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{
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type = INT32;
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char buffer[2];
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filestr->read( buffer, 2 );
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intData = ( int )( ( buffer[1] << 8 ) | buffer[0] );
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DRW_DBG(intData); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readInt32()
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{
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type = INT32;
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unsigned int *int32p;
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char buffer[4];
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filestr->read( buffer, 4 );
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int32p = ( unsigned int * ) buffer;
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intData = *int32p;
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DRW_DBG(intData); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readInt64()
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{
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type = INT64;
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unsigned long long int *int64p; //64 bits integer pointer
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char buffer[8];
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filestr->read( buffer, 8 );
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int64p = ( unsigned long long int * ) buffer;
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int64 = *int64p;
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DRW_DBG(int64); DRW_DBG(" int64\n");
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return filestr->good();
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}
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bool dxfReaderBinary::readDouble()
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{
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type = DOUBLE;
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filestr->read( ( char * ) &doubleData, sizeof doubleData );
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DRW_DBG(doubleData); DRW_DBG("\n");
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return filestr->good();
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}
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//saved as int or add a bool member??
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bool dxfReaderBinary::readBool()
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{
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char buffer;
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filestr->read( &buffer, 1 );
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intData = buffer;
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DRW_DBG(intData); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderAscii::readCode( int *code )
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{
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std::string text;
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std::getline( *filestr, text );
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*code = atoi( text.c_str() );
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DRW_DBG(*code); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderAscii::readString( std::string *text )
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{
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type = STRING;
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std::getline( *filestr, *text );
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if ( !text->empty() && text->at( text->size() - 1 ) == '\r' )
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text->erase( text->size() - 1 );
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return filestr->good();
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}
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bool dxfReaderAscii::readString()
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{
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type = STRING;
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std::getline( *filestr, strData );
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if ( !strData.empty() && strData.at( strData.size() - 1 ) == '\r' )
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strData.erase( strData.size() - 1 );
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DRW_DBG(strData); DRW_DBG("\n");
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return filestr->good();
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}
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bool dxfReaderAscii::readInt16()
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{
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type = INT32;
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std::string text;
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if ( readString( &text ) )
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{
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intData = atoi( text.c_str() );
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DRW_DBG(intData); DRW_DBG("\n");
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return true;
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}
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else
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return false;
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}
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bool dxfReaderAscii::readInt32()
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{
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type = INT32;
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return readInt16();
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}
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bool dxfReaderAscii::readInt64()
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{
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type = INT64;
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return readInt16();
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}
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bool dxfReaderAscii::readDouble()
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{
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bool ok = false;
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type = DOUBLE;
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std::string text;
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if ( readString( &text ) )
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{
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#if defined(__APPLE__)
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int succeeded=sscanf( & (text[0]), "%lg", &doubleData);
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if(succeeded != 1) {
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DRW_DBG("dxfReaderAscii::readDouble(): reading double error: ");
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DRW_DBG(text);
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DRW_DBG('\n');
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}
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#else
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std::istringstream sd(text);
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sd >> doubleData;
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DRW_DBG(doubleData); DRW_DBG('\n');
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#endif
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}
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return ok;
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}
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//saved as int or add a bool member??
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bool dxfReaderAscii::readBool()
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{
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type = BOOL;
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std::string text;
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if ( readString( &text ) )
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{
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intData = atoi( text.c_str() );
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DRW_DBG(intData); DRW_DBG("\n");
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return true;
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}
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else
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{
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return false;
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}
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}
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