OPeNDAP Hyrax Back End Server (BES)
Updated for version 3.8.3
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00001 // PPTStreamBuf.cc 00002 00003 // This file is part of bes, A C++ back-end server implementation framework 00004 // for the OPeNDAP Data Access Protocol. 00005 00006 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research 00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu> 00008 // 00009 // This library is free software; you can redistribute it and/or 00010 // modify it under the terms of the GNU Lesser General Public 00011 // License as published by the Free Software Foundation; either 00012 // version 2.1 of the License, or (at your option) any later version. 00013 // 00014 // This library is distributed in the hope that it will be useful, 00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 // Lesser General Public License for more details. 00018 // 00019 // You should have received a copy of the GNU Lesser General Public 00020 // License along with this library; if not, write to the Free Software 00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00022 // 00023 // You can contact University Corporation for Atmospheric Research at 00024 // 3080 Center Green Drive, Boulder, CO 80301 00025 00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005 00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR. 00028 // 00029 // Authors: 00030 // pwest Patrick West <pwest@ucar.edu> 00031 // jgarcia Jose Garcia <jgarcia@ucar.edu> 00032 00033 #include <sys/types.h> 00034 00035 #include <cstdio> 00036 #include <unistd.h> // for sync 00037 #include <sstream> 00038 #include <iomanip> 00039 #include <iostream> 00040 00041 using std::ostringstream ; 00042 using std::hex ; 00043 using std::setw ; 00044 using std::setfill ; 00045 00046 #include "PPTStreamBuf.h" 00047 #include "BESDebug.h" 00048 00049 PPTStreamBuf::PPTStreamBuf( int fd, unsigned bufsize ) 00050 : d_bufsize( bufsize ), 00051 d_buffer( 0 ), 00052 count( 0 ) 00053 { 00054 open( fd, bufsize ) ; 00055 } 00056 00057 PPTStreamBuf::~PPTStreamBuf() 00058 { 00059 if(d_buffer) 00060 { 00061 sync() ; 00062 delete [] d_buffer ; 00063 } 00064 } 00065 00066 void 00067 PPTStreamBuf::open( int fd, unsigned bufsize ) 00068 { 00069 d_fd = fd ; 00070 d_bufsize = bufsize == 0 ? 1 : bufsize ; 00071 00072 d_buffer = new char[d_bufsize] ; 00073 setp( d_buffer, d_buffer + d_bufsize ) ; 00074 } 00075 00076 int 00077 PPTStreamBuf::sync() 00078 { 00079 if( pptr() > pbase() ) 00080 { 00081 ostringstream strm ; 00082 strm << hex << setw( 7 ) << setfill( '0' ) << (unsigned int)(pptr() - pbase()) << "d" ; 00083 string tmp_str = strm.str() ; 00084 write( d_fd, tmp_str.c_str(), tmp_str.length() ) ; 00085 count += write( d_fd, d_buffer, pptr() - pbase() ) ; 00086 setp( d_buffer, d_buffer + d_bufsize ) ; 00087 // If something doesn't look right try using fsync 00088 fsync(d_fd); 00089 } 00090 return 0 ; 00091 } 00092 00093 int 00094 PPTStreamBuf::overflow( int c ) 00095 { 00096 sync() ; 00097 if( c != EOF ) 00098 { 00099 *pptr() = static_cast<char>(c) ; 00100 pbump( 1 ) ; 00101 } 00102 return c ; 00103 } 00104 00105 void 00106 PPTStreamBuf::finish() 00107 { 00108 sync() ; 00109 ostringstream strm ; 00110 /* 00111 ostringstream xstrm ; 00112 xstrm << "count=" << hex << setw( 7 ) << setfill( '0' ) << how_many() << ";" ; 00113 string xstr = xstrm.str() ; 00114 strm << hex << setw( 7 ) << setfill( '0' ) << (unsigned int)xstr.length() << "x" << xstr ; 00115 */ 00116 strm << hex << setw( 7 ) << setfill( '0' ) << (unsigned int)0 << "d" ; 00117 string tmp_str = strm.str() ; 00118 BESDEBUG( "ppt", "PPTStreamBuf::finish - writing " << tmp_str << endl ) ; 00119 write( d_fd, tmp_str.c_str(), tmp_str.length() ) ; 00120 // If something doesn't look right try using fsync 00121 fsync(d_fd); 00122 count = 0 ; 00123 } 00124