GroovX: src/rutz/cstrstream.cc Source File

00001 
00003 
00004 //
00005 // Copyright (c) 2004-2007 University of Southern California
00006 // Rob Peters <rjpeters at usc dot edu>
00007 //
00008 // created: Fri Oct  8 15:45:46 2004
00009 // commit: $Id: cstrstream.cc 10065 2007-04-12 05:54:56Z rjpeters $
00010 // $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/rutz/cstrstream.cc $
00011 //
00012 // --------------------------------------------------------------------
00013 //
00014 // This file is part of GroovX.
00015 //   [http://ilab.usc.edu/rjpeters/groovx/]
00016 //
00017 // GroovX is free software; you can redistribute it and/or modify it
00018 // under the terms of the GNU General Public License as published by
00019 // the Free Software Foundation; either version 2 of the License, or
00020 // (at your option) any later version.
00021 //
00022 // GroovX is distributed in the hope that it will be useful, but
00023 // WITHOUT ANY WARRANTY; without even the implied warranty of
00024 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00025 // General Public License for more details.
00026 //
00027 // You should have received a copy of the GNU General Public License
00028 // along with GroovX; if not, write to the Free Software Foundation,
00029 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00030 //
00032 
00033 #ifndef GROOVX_RUTZ_CSTRSTREAM_CC_UTC20050626084020_DEFINED
00034 #define GROOVX_RUTZ_CSTRSTREAM_CC_UTC20050626084020_DEFINED
00035 
00036 #include "cstrstream.h"
00037 
00038 rutz::imembuf::imembuf(const char* s) :
00039   m_len(strlen(s)),
00040   m_buf(s),
00041   m_owned_mem(0)
00042 {
00043   setg(const_cast<char*>(m_buf),
00044        const_cast<char*>(m_buf),
00045        const_cast<char*>(m_buf) + m_len);
00046 }
00047 
00048 rutz::imembuf::imembuf(const char* s, unsigned int len) :
00049   m_len(len),
00050   m_buf(s),
00051   m_owned_mem(0)
00052 {
00053   setg(const_cast<char*>(m_buf),
00054        const_cast<char*>(m_buf),
00055        const_cast<char*>(m_buf) + m_len);
00056 }
00057 
00058 void rutz::imembuf::make_owning()
00059 {
00060   if (m_owned_mem == 0)
00061     {
00062       m_owned_mem = new char[m_len+1];
00063       memcpy(m_owned_mem, m_buf, m_len+1);
00064       m_buf = 0;
00065       setg(m_owned_mem, m_owned_mem, m_owned_mem + m_len);
00066     }
00067 }
00068 
00069 rutz::imembuf::~imembuf()
00070 {
00071   delete [] m_owned_mem;
00072 }
00073 
00074 int rutz::imembuf::underflow()
00075 {
00076   if (gptr() < egptr())
00077     {
00078       return *gptr();
00079     }
00080 
00081   // Since there's no "external data source", if we've come to the end
00082   // of our current buffer, then we're just plain out of data.
00083   return EOF;
00084 }
00085 
00086 rutz::imemstream::imemstream(const char* s)
00087   :
00088   std::istream(&m_buf), m_buf(s)
00089 {}
00090 
00091 rutz::imemstream::imemstream(const char* s, unsigned int len)
00092   :
00093   std::istream(&m_buf), m_buf(s, len)
00094 {}
00095 
00096 rutz::icstrstream::icstrstream(const char* s)
00097   :
00098   std::istream(&m_buf), m_buf(s)
00099 {
00100   m_buf.make_owning();
00101 }
00102 
00103 static const char __attribute__((used)) vcid_groovx_rutz_cstrstream_cc_utc20050626084020[] = "$Id: cstrstream.cc 10065 2007-04-12 05:54:56Z rjpeters $ $HeadURL: file:
00104 #endif // !GROOVX_RUTZ_CSTRSTREAM_CC_UTC20050626084020_DEFINED