518 lines
13 KiB
C++
518 lines
13 KiB
C++
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/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2007-2011 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
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* Copyright (C) 2007 KiCad Developers, see change_log.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <cstdarg>
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#include <richio.h>
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// Fall back to getc() when getc_unlocked() is not available on the target platform.
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#if !defined( HAVE_FGETC_NOLOCK )
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#define getc_unlocked getc
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#endif
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// This file defines 3 classes useful for working with DSN text files and is named
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// "richio" after its author, Richard Hollenbeck, aka Dick Hollenbeck.
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//-----<LINE_READER>------------------------------------------------------
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LINE_READER::LINE_READER( unsigned aMaxLineLength )
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{
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lineNum = 0;
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if( aMaxLineLength == 0 ) // caller is goofed up.
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aMaxLineLength = LINE_READER_LINE_DEFAULT_MAX;
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maxLineLength = aMaxLineLength;
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// start at the INITIAL size, expand as needed up to the MAX size in maxLineLength
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capacity = LINE_READER_LINE_INITIAL_SIZE;
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// but never go above user's aMaxLineLength, and leave space for trailing nul
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if( capacity > aMaxLineLength+1 )
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capacity = aMaxLineLength+1;
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line = new char[capacity];
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line[0] = '\0';
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length = 0;
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}
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void LINE_READER::expandCapacity( unsigned newsize )
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{
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// length can equal maxLineLength and nothing breaks, there's room for
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// the terminating nul. cannot go over this.
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if( newsize > maxLineLength+1 )
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newsize = maxLineLength+1;
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if( newsize > capacity )
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{
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capacity = newsize;
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// resize the buffer, and copy the original data
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char* bigger = new char[capacity];
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wxASSERT( capacity >= length+1 );
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memcpy( bigger, line, length );
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bigger[length] = 0;
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delete[] line;
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line = bigger;
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}
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}
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FILE_LINE_READER::FILE_LINE_READER( FILE* aFile, const wxString& aFileName,
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bool doOwn,
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unsigned aStartingLineNumber,
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unsigned aMaxLineLength ) :
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LINE_READER( aMaxLineLength ),
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iOwn( doOwn ),
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fp( aFile )
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{
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if( doOwn )
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{
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setvbuf( fp, NULL, _IOFBF, BUFSIZ * 8 );
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}
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source = aFileName;
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lineNum = aStartingLineNumber;
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}
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FILE_LINE_READER::~FILE_LINE_READER()
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{
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if( iOwn && fp )
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fclose( fp );
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}
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#if 0
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// The strlen() will trip on embedded nuls which can come in via bad data files.
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// Try an alternate technique below.
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unsigned FILE_LINE_READER::ReadLine() throw( IO_ERROR )
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{
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length = 0;
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line[0] = 0;
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// fgets always puts a terminating nul at end of its read.
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while( fgets( line + length, capacity - length, fp ) )
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{
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length += strlen( line + length );
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if( length >= maxLineLength )
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THROW_IO_ERROR( _("Line length exceeded") );
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// a normal line breaks here, once through while loop
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if( length+1 < capacity || line[length-1] == '\n' )
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break;
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expandCapacity( capacity * 2 );
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}
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// lineNum is incremented even if there was no line read, because this
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// leads to better error reporting when we hit an end of file.
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++lineNum;
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return length;
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}
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#else
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unsigned FILE_LINE_READER::ReadLine() throw( IO_ERROR )
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{
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length = 0;
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for(;;)
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{
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if( length >= maxLineLength )
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THROW_IO_ERROR( _( "Maximum line length exceeded" ) );
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if( length >= capacity )
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expandCapacity( capacity * 2 );
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// faster, POSIX compatible fgetc(), no locking.
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int cc = getc_unlocked( fp );
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if( cc == EOF )
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break;
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line[ length++ ] = (char) cc;
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if( cc == '\n' )
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break;
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}
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line[ length ] = 0;
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// lineNum is incremented even if there was no line read, because this
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// leads to better error reporting when we hit an end of file.
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++lineNum;
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return length;
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}
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#endif
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STRING_LINE_READER::STRING_LINE_READER( const std::string& aString, const wxString& aSource ) :
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LINE_READER( LINE_READER_LINE_DEFAULT_MAX ),
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lines( aString ),
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ndx( 0 )
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{
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// Clipboard text should be nice and _use multiple lines_ so that
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// we can report _line number_ oriented error messages when parsing.
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source = aSource;
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}
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STRING_LINE_READER::STRING_LINE_READER( const STRING_LINE_READER& aStartingPoint ) :
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LINE_READER( LINE_READER_LINE_DEFAULT_MAX ),
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lines( aStartingPoint.lines ),
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ndx( aStartingPoint.ndx )
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{
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// since we are keeping the same "source" name, for error reporting purposes
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// we need to have the same notion of line number and offset.
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source = aStartingPoint.source;
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lineNum = aStartingPoint.lineNum;
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}
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unsigned STRING_LINE_READER::ReadLine() throw( IO_ERROR )
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{
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size_t nlOffset = lines.find( '\n', ndx );
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if( nlOffset == std::string::npos )
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length = lines.length() - ndx;
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else
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length = nlOffset - ndx + 1; // include the newline, so +1
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if( length )
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{
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if( length >= maxLineLength )
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THROW_IO_ERROR( _("Line length exceeded") );
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if( length+1 > capacity ) // +1 for terminating nul
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expandCapacity( length+1 );
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wxASSERT( ndx + length <= lines.length() );
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memcpy( line, &lines[ndx], length );
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ndx += length;
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}
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++lineNum; // this gets incremented even if no bytes were read
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line[length] = 0;
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return length;
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}
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INPUTSTREAM_LINE_READER::INPUTSTREAM_LINE_READER( wxInputStream* aStream ) :
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LINE_READER( LINE_READER_LINE_DEFAULT_MAX ),
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m_stream( aStream )
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{
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}
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unsigned INPUTSTREAM_LINE_READER::ReadLine() throw( IO_ERROR )
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{
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length = 0;
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for(;;)
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{
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if( length >= maxLineLength )
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THROW_IO_ERROR( _( "Maximum line length exceeded" ) );
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if( length + 1 > capacity )
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expandCapacity( capacity * 2 );
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// this read may fail, docs say to test LastRead() before trusting cc.
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char cc = m_stream->GetC();
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if( !m_stream->LastRead() )
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break;
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line[ length++ ] = cc;
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if( cc == '\n' )
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break;
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}
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line[ length ] = 0;
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// lineNum is incremented even if there was no line read, because this
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// leads to better error reporting when we hit an end of file.
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++lineNum;
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return length;
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}
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//-----<OUTPUTFORMATTER>----------------------------------------------------
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// factor out a common GetQuoteChar
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const char* OUTPUTFORMATTER::GetQuoteChar( const char* wrapee, const char* quote_char )
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{
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// Include '#' so a symbol is not confused with a comment. We intend
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// to wrap any symbol starting with a '#'.
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// Our LEXER class handles comments, and comments appear to be an extension
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// to the SPECCTRA DSN specification.
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if( *wrapee == '#' )
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return quote_char;
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if( strlen( wrapee ) == 0 )
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return quote_char;
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bool isFirst = true;
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for( ; *wrapee; ++wrapee, isFirst = false )
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{
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static const char quoteThese[] = "\t ()"
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"%" // per Alfons of freerouting.net, he does not like this unquoted as of 1-Feb-2008
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"{}" // guessing that these are problems too
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;
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// if the string to be wrapped (wrapee) has a delimiter in it,
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// return the quote_char so caller wraps the wrapee.
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if( strchr( quoteThese, *wrapee ) )
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return quote_char;
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if( !isFirst && '-' == *wrapee )
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return quote_char;
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}
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return ""; // caller does not need to wrap, can use an unwrapped string.
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}
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const char* OUTPUTFORMATTER::GetQuoteChar( const char* wrapee )
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{
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return GetQuoteChar( wrapee, quoteChar );
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}
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int OUTPUTFORMATTER::vprint( const char* fmt, va_list ap ) throw( IO_ERROR )
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{
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int ret = vsnprintf( &buffer[0], buffer.size(), fmt, ap );
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if( ret >= (int) buffer.size() )
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{
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buffer.resize( ret + 2000 );
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ret = vsnprintf( &buffer[0], buffer.size(), fmt, ap );
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}
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if( ret > 0 )
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write( &buffer[0], ret );
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return ret;
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}
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int OUTPUTFORMATTER::sprint( const char* fmt, ... ) throw( IO_ERROR )
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{
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va_list args;
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va_start( args, fmt );
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int ret = vprint( fmt, args);
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va_end( args );
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return ret;
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}
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int OUTPUTFORMATTER::Print( int nestLevel, const char* fmt, ... ) throw( IO_ERROR )
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{
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#define NESTWIDTH 2 ///< how many spaces per nestLevel
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va_list args;
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va_start( args, fmt );
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int result = 0;
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int total = 0;
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for( int i=0; i<nestLevel; ++i )
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{
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// no error checking needed, an exception indicates an error.
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result = sprint( "%*c", NESTWIDTH, ' ' );
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total += result;
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}
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// no error checking needed, an exception indicates an error.
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result = vprint( fmt, args );
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va_end( args );
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total += result;
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return total;
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}
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std::string OUTPUTFORMATTER::Quotes( const std::string& aWrapee ) throw( IO_ERROR )
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{
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static const char quoteThese[] = "\t ()\n\r";
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if( !aWrapee.size() || // quote null string as ""
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aWrapee[0]=='#' || // quote a potential s-expression comment, so it is not a comment
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aWrapee[0]=='"' || // NextTok() will travel through DSN_STRING path anyway, then must apply escapes
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aWrapee.find_first_of( quoteThese ) != std::string::npos )
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{
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std::string ret;
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ret.reserve( aWrapee.size()*2 + 2 );
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ret += '"';
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for( std::string::const_iterator it = aWrapee.begin(); it!=aWrapee.end(); ++it )
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{
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switch( *it )
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{
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case '\n':
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ret += '\\';
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ret += 'n';
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break;
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case '\r':
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ret += '\\';
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ret += 'r';
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break;
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case '\\':
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ret += '\\';
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ret += '\\';
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break;
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case '"':
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ret += '\\';
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ret += '"';
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break;
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default:
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ret += *it;
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}
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}
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ret += '"';
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return ret;
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}
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return aWrapee;
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}
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std::string OUTPUTFORMATTER::Quotew( const wxString& aWrapee ) throw( IO_ERROR )
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{
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// wxStrings are always encoded as UTF-8 as we convert to a byte sequence.
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// The non-virutal function calls the virtual workhorse function, and if
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// a different quoting or escaping strategy is desired from the standard,
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// a derived class can overload Quotes() above, but
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// should never be a reason to overload this Quotew() here.
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return Quotes( (const char*) aWrapee.utf8_str() );
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}
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//-----<STRING_FORMATTER>----------------------------------------------------
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void STRING_FORMATTER::write( const char* aOutBuf, int aCount ) throw( IO_ERROR )
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{
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mystring.append( aOutBuf, aCount );
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}
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void STRING_FORMATTER::StripUseless()
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{
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std::string copy = mystring;
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mystring.clear();
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for( std::string::iterator i=copy.begin(); i!=copy.end(); ++i )
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{
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if( !isspace( *i ) && *i!=')' && *i!='(' && *i!='"' )
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{
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mystring += *i;
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}
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}
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}
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//-----<FILE_OUTPUTFORMATTER>----------------------------------------
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FILE_OUTPUTFORMATTER::FILE_OUTPUTFORMATTER( const wxString& aFileName,
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const wxChar* aMode, char aQuoteChar ) throw( IO_ERROR ) :
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OUTPUTFORMATTER( OUTPUTFMTBUFZ, aQuoteChar ),
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m_filename( aFileName )
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{
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m_fp = wxFopen( aFileName, aMode );
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if( !m_fp )
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{
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wxString msg = wxString::Format(
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_( "cannot open or save file '%s'" ),
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m_filename.GetData() );
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THROW_IO_ERROR( msg );
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}
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}
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FILE_OUTPUTFORMATTER::~FILE_OUTPUTFORMATTER()
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{
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if( m_fp )
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fclose( m_fp );
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}
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void FILE_OUTPUTFORMATTER::write( const char* aOutBuf, int aCount ) throw( IO_ERROR )
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{
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if( 1 != fwrite( aOutBuf, aCount, 1, m_fp ) )
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{
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wxString msg = wxString::Format(
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_( "error writing to file '%s'" ),
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m_filename.GetData() );
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THROW_IO_ERROR( msg );
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}
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}
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//-----<STREAM_OUTPUTFORMATTER>--------------------------------------
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void STREAM_OUTPUTFORMATTER::write( const char* aOutBuf, int aCount ) throw( IO_ERROR )
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{
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int lastWrite;
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// This might delay awhile if you were writing to say a socket, but for
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// a file it should only go through the loop once.
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for( int total = 0; total<aCount; total += lastWrite )
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{
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lastWrite = os.Write( aOutBuf, aCount ).LastWrite();
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if( !os.IsOk() )
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{
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THROW_IO_ERROR( _( "OUTPUTSTREAM_OUTPUTFORMATTER write error" ) );
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}
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}
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}
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