mirror of https://github.com/BOINC/boinc.git
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
// Berkeley Open Infrastructure for Network Computing
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// http://boinc.berkeley.edu
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// Copyright (C) 2005 University of California
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//
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// This is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation;
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// either version 2.1 of the License, or (at your option) any later version.
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//
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// This software is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// To view the GNU Lesser General Public License visit
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// http://www.gnu.org/copyleft/lesser.html
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// or write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef _MFILE_
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#define _MFILE_
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#include <cstdio>
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#include <cstdarg>
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// MFILE provides memory-buffered output with a FILE-type interface.
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// BOINC uses this in a couple of places:
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// 1) in the GUI RPC system (since in Windows you can't fdopen a socket)
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// 2) in the API, to support a primitive form of checkpointing:
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// Write all your output (and restart file) to MFILEs.
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// The output is buffered in memory.
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// Then close or flush all the MFILEs;
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// all the buffers will be flushed to disk, almost atomically.
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class MFILE {
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char* buf; // NULL-terminated
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int len;
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FILE* f;
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public:
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MFILE();
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~MFILE();
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int open(const char* path, const char* mode);
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int _putchar(char);
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int puts(const char*);
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int vprintf(const char* format, va_list);
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int printf(const char* format, ...);
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size_t write(const void *, size_t size, size_t nitems);
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int close();
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int flush();
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long tell() const;
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void get_buf(char*&, int&);
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// get the MFILE's internal buffer and its length.
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// The caller assumes ownership of the buffer and must free() it.
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// The MFILE's buffer is set to empty
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};
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#endif
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