gecko/nsprpub/lib/prstreams/prstrms.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Robin J. Maxwell 11-22-96
* Fredrik Roubert <roubert@google.com> 2010-07-23
* Matt Austern <austern@google.com> 2010-07-23
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*/
#ifndef _PRSTRMS_H
#define _PRSTRMS_H
#include <cstddef>
#include <istream>
#include <ostream>
#include <streambuf>
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#include "prio.h"
#ifdef _MSC_VER
// http://support.microsoft.com/kb/q168958/
class PR_IMPLEMENT(std::_Mutex);
class PR_IMPLEMENT(std::ios_base);
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#endif
class PR_IMPLEMENT(PRfilebuf): public std::streambuf
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{
public:
PRfilebuf();
PRfilebuf(PRFileDesc *fd);
PRfilebuf(PRFileDesc *fd, char_type *ptr, std::streamsize len);
virtual ~PRfilebuf();
bool is_open() const { return _fd != NULL; }
PRfilebuf *open(
const char *name,
std::ios_base::openmode flags,
PRIntn mode);
PRfilebuf *attach(PRFileDesc *fd);
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PRfilebuf *close();
protected:
virtual std::streambuf *setbuf(char_type *ptr, std::streamsize len);
virtual pos_type seekoff(
off_type offset,
std::ios_base::seekdir dir,
std::ios_base::openmode flags);
virtual pos_type seekpos(
pos_type pos,
std::ios_base::openmode flags) {
return seekoff(pos, std::ios_base::beg, flags);
}
virtual int sync();
virtual int_type underflow();
virtual int_type overflow(int_type c = traits_type::eof());
// TODO: Override pbackfail(), showmanyc(), uflow(), xsgetn(), and xsputn().
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private:
bool allocate();
void setb(char_type *buf_base, char_type *buf_end, bool user_buf);
PRFileDesc *_fd;
bool _opened;
bool _allocated;
bool _unbuffered;
bool _user_buf;
char_type *_buf_base;
char_type *_buf_end;
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};
class PR_IMPLEMENT(PRifstream): public std::istream
{
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public:
PRifstream();
PRifstream(PRFileDesc *fd);
PRifstream(PRFileDesc *fd, char_type *ptr, std::streamsize len);
PRifstream(const char *name, openmode flags = in, PRIntn mode = 0);
virtual ~PRifstream();
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PRfilebuf *rdbuf() const { return &_filebuf; }
bool is_open() const { return _filebuf.is_open(); }
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void open(const char *name, openmode flags = in, PRIntn mode = 0);
void attach(PRFileDesc *fd);
void close();
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private:
mutable PRfilebuf _filebuf;
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};
class PR_IMPLEMENT(PRofstream): public std::ostream
{
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public:
PRofstream();
PRofstream(PRFileDesc *fd);
PRofstream(PRFileDesc *fd, char_type *ptr, std::streamsize len);
PRofstream(const char *name, openmode flags = out, PRIntn mode = 0);
virtual ~PRofstream();
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PRfilebuf *rdbuf() const { return &_filebuf; }
bool is_open() const { return _filebuf.is_open(); }
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void open(const char *name, openmode flags = out, PRIntn mode = 0);
void attach(PRFileDesc *fd);
void close();
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private:
mutable PRfilebuf _filebuf;
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};
class PR_IMPLEMENT(PRfstream): public std::iostream
{
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public:
PRfstream();
PRfstream(PRFileDesc *fd);
PRfstream(PRFileDesc *fd, char_type *ptr, std::streamsize len);
PRfstream(const char *name, openmode flags = in | out, PRIntn mode = 0);
virtual ~PRfstream();
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PRfilebuf *rdbuf() const { return &_filebuf; }
bool is_open() const { return _filebuf.is_open(); }
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void open(const char *name, openmode flags = in | out, PRIntn mode = 0);
void attach(PRFileDesc *fd);
void close();
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private:
mutable PRfilebuf _filebuf;
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};
#endif /* _PRSTRMS_H */