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// Copyright (C) 2005 and later by various people
// see monotone commit logs for details and authors
//
// This program is made available under the GNU GPL version 2.0 or
// greater. See the accompanying file COPYING for details.
//
// This program is distributed WITHOUT ANY WARRANTY; without even the
// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE.
#ifndef __AUTOMATE_OSTREAM_HH__
#define __AUTOMATE_OSTREAM_HH__
#include <iostream>
#include <vector>
#include "lexical_cast.hh"
using boost::lexical_cast;
template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
class basic_automate_streambuf : public std::basic_streambuf<_CharT, _Traits>
{
typedef _Traits traits_type;
typedef typename _Traits::int_type int_type;
size_t _bufsize;
std::basic_ostream<_CharT, _Traits> *out;
int cmdnum;
public:
basic_automate_streambuf(std::ostream & o, size_t bufsize)
: std::basic_streambuf<_CharT, _Traits>(), _bufsize(bufsize), out(&o), cmdnum(0)
{
_CharT *inbuf = new _CharT[_bufsize];
this->setp(inbuf, inbuf + _bufsize);
}
basic_automate_streambuf()
{}
~basic_automate_streambuf()
{}
void end_cmd(int errcode)
{
_M_sync();
write_out_of_band('l', lexical_cast<std::string>(errcode));
++cmdnum;
}
virtual int sync()
{
_M_sync();
return 0;
}
void _M_sync()
{
if (!out)
{
this->setp(this->pbase(), this->pbase() + _bufsize);
return;
}
int num = this->pptr() - this->pbase();
if (num)
{
(*out) << cmdnum << ':'
<< 'm' << ':'
<< num << ':'
<< std::basic_string<_CharT,_Traits>(this->pbase(), num);
this->setp(this->pbase(), this->pbase() + _bufsize);
out->flush();
}
}
void write_out_of_band(char type, std::string const & data)
{
unsigned chunksize = _bufsize;
size_t length = data.size(), offset = 0;
do
{
if (offset+chunksize>length)
chunksize = length-offset;
(*out) << cmdnum << ':' << type << ':' << chunksize
<< ':' << data.substr(offset, chunksize);
offset+= chunksize;
} while (offset<length);
out->flush();
}
void write_headers(std::vector<std::pair<std::string,std::string> > const & headers)
{
for (std::vector<std::pair<std::string, std::string> >::const_iterator h = headers.begin();
h != headers.end(); ++h)
{
(*out) << h->first << ": " << h->second << '\n';
}
(*out) << '\n';
out->flush();
}
int_type
overflow(int_type c = traits_type::eof())
{
sync();
this->sputc(c);
return 0;
}
};
template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
struct basic_automate_ostream : public std::basic_ostream<_CharT, _Traits>
{
typedef basic_automate_streambuf<_CharT, _Traits> streambuf_type;
streambuf_type _M_autobuf;
basic_automate_ostream(std::basic_ostream<_CharT, _Traits> &out,
size_t blocksize)
: std::basic_ostream<_CharT, _Traits>(&_M_autobuf),
_M_autobuf(out, blocksize)
{ /* this->init(&_M_autobuf); */ }
protected:
basic_automate_ostream() { }
public:
virtual ~basic_automate_ostream()
{}
streambuf_type *
rdbuf() const
{ return const_cast<streambuf_type *>(&_M_autobuf); }
virtual void end_cmd(int errcode)
{ _M_autobuf.end_cmd(errcode); }
virtual void write_out_of_band(char type, std::string const & data)
{ _M_autobuf.write_out_of_band(type, data); }
virtual void write_headers(std::vector<std::pair<std::string,std::string> > const & headers)
{ _M_autobuf.write_headers(headers); }
};
typedef basic_automate_streambuf<char> automate_streambuf;
typedef basic_automate_ostream<char> automate_ostream;
#endif
// Local Variables:
// mode: C++
// fill-column: 76
// c-file-style: "gnu"
// indent-tabs-mode: nil
// End:
// vim: et:sw=2:sts=2:ts=2:cino=>2s,{s,\:s,+s,t0,g0,^-2,e-2,n-2,p2s,(0,=s:
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