00001 // Filename: copy_stream.cxx 00002 // Created by: drose (27Aug09) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #include "copy_stream.h" 00016 00017 //////////////////////////////////////////////////////////////////// 00018 // Function: copy_stream 00019 // Access: Published 00020 // Description: Reads the source stream from its current position to 00021 // the end of the stream, and writes that data to the 00022 // dest stream at its current position. Returns true on 00023 // success, false on failure. 00024 //////////////////////////////////////////////////////////////////// 00025 bool 00026 copy_stream(istream &source, ostream &dest) { 00027 static const size_t buffer_size = 4096; 00028 char buffer[buffer_size]; 00029 00030 source.read(buffer, buffer_size); 00031 size_t count = source.gcount(); 00032 while (count != 0) { 00033 dest.write(buffer, count); 00034 source.read(buffer, buffer_size); 00035 count = source.gcount(); 00036 } 00037 00038 return (!source.fail() || source.eof()) && (!dest.fail()); 00039 }