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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2005--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LilyPond is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cassert>
#include <cstring>
#include <cstdlib>
using namespace std;
#include "memory-stream.hh"
/*
TODO: add read support as well.
*/
const int Memory_out_stream::block_size_ = 1024;
lily_cookie_io_functions_t
Memory_out_stream::functions_
=
{
Memory_out_stream::reader,
Memory_out_stream::writer,
Memory_out_stream::seeker,
Memory_out_stream::cleaner
};
ssize_t
Memory_out_stream::cleaner (void *cookie)
{
Memory_out_stream *stream = (Memory_out_stream *) cookie;
stream->file_ = 0;
return 0;
}
Memory_out_stream::Memory_out_stream ()
{
size_ = 0;
buffer_ = 0;
buffer_blocks_ = 0;
file_ = 0;
#if 0
file_ = fopencookie ((void *) this, "w", functions_);
#endif
}
Memory_out_stream::~Memory_out_stream ()
{
if (file_)
fclose (file_);
free (buffer_);
}
FILE *
Memory_out_stream::get_file () const
{
return file_;
}
ssize_t
Memory_out_stream::get_length () const
{
return size_;
}
char const *
Memory_out_stream::get_string () const
{
return buffer_;
}
ssize_t
Memory_out_stream::writer (void *cookie,
char const *buffer,
size_t size)
{
Memory_out_stream *stream = (Memory_out_stream *) cookie;
ssize_t newsize = stream->size_ + (ssize_t) size;
bool change = false;
while (newsize > stream->buffer_blocks_ * block_size_)
{
stream->buffer_blocks_ *= 2;
stream->buffer_blocks_ += 1;
change = true;
}
if (change)
stream->buffer_ = (char *) realloc (stream->buffer_,
(size_t) (stream->buffer_blocks_ * block_size_));
memcpy (stream->buffer_ + stream->size_, buffer, size);
stream->size_ = newsize;
return (ssize_t) size;
}
ssize_t
Memory_out_stream::reader (void * /* cookie */,
char * /* buffer */,
size_t /* size */)
{
assert (false);
return 0;
}
ssize_t
Memory_out_stream::seeker (void *,
off64_t *,
size_t)
{
assert (false);
return 0;
}
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