97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/*
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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) 2023 KiCad Developers, see AUTHORS.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 3
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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/gpl-3.0.html
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* or you may search the http://www.gnu.org website for the version 3 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 <streambuf>
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#include <istream>
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#include <string>
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#include <git2.h>
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#include <richio.h>
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class BLOB_BUFFER_STREAM : public std::streambuf
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{
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public:
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BLOB_BUFFER_STREAM( git_blob* aBlob )
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{
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// Yay C++
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setg( const_cast<char*>( static_cast<const char*>( git_blob_rawcontent( aBlob ) ) ),
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const_cast<char*>( static_cast<const char*>( git_blob_rawcontent( aBlob ) ) ),
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const_cast<char*>( static_cast<const char*>( git_blob_rawcontent( aBlob ) ) ) + git_blob_rawsize( aBlob ) );
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}
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~BLOB_BUFFER_STREAM() override
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{
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}
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int overflow( int c ) override
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{
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return traits_type::eof();
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}
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std::streamsize xsputn( const char* s, std::streamsize n ) override
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{
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return 0;
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}
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};
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// Build a class that implements LINE_READER for git_blobs
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class BLOB_READER : public LINE_READER
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{
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public:
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BLOB_READER( git_blob* aBlob ) : m_blob( aBlob )
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{
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m_stream = new BLOB_BUFFER_STREAM( m_blob );
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m_istream = new std::istream( m_stream );
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m_line = nullptr;
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m_lineNum = 0;
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}
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~BLOB_READER() override
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{
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delete m_istream;
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delete m_stream;
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}
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char* ReadLine() override
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{
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getline( *m_istream, m_buffer );
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m_buffer.append( 1, '\n' );
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m_length = m_buffer.size();
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m_line = (char*) m_buffer.data(); //ew why no const??
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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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++m_lineNum;
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return m_istream->eof() ? nullptr : m_line;
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}
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private:
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git_blob* m_blob;
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BLOB_BUFFER_STREAM* m_stream;
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std::istream* m_istream;
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std::string m_buffer;
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}; |