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pjs/xpcom/io/nsFileStream.h

738 строки
27 KiB
C
Исходник Обычный вид История

First Checked In.
1998-12-08 05:15:50 +03:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0(the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright(C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
// First checked in on 98/11/20 by John R. McMullen. Checked in again 98/12/04.
#ifndef _STREAM_H_
#define _STREAM_H_
#include <istream>
#include "prio.h"
#include "nsFileSpec.h"
#ifdef __MWERKS__
#ifdef MSIPL_WCHART
#define NS_USING_WIDE_CHAR
#endif
#ifdef MSIPL_EXPLICIT_FUNC_TEMPLATE_ARG
#define NS_EXPLICIT_FUNC_TEMPLATE_ARG
#endif
#endif
//========================================================================================
template<class charT, class traits>
class nsFileBufferT
//========================================================================================
: public basic_streambuf<charT, traits>
{
typedef codecvt_base::result result;
public:
typedef charT char_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef typename traits::int_type int_type;
typedef traits traits_type;
typedef typename traits::state_type state_type;
typedef nsFileBufferT<charT, traits> filebuf_type;
typedef codecvt<charT, char, state_type> ofacet_type;
typedef codecvt<char, charT, state_type> ifacet_type;
nsFileBufferT();
nsFileBufferT(PRFileDesc* pfile_arg);
virtual ~nsFileBufferT();
bool is_open() const;
filebuf_type* open(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode);
filebuf_type* close();
protected:
virtual int_type overflow(int_type c=traits::eof());
virtual int_type pbackfail(int_type c=traits::eof());
virtual int_type underflow();
virtual pos_type seekoff(
off_type off, ios_base::seekdir way,
ios_base::openmode which=ios_base::in|ios_base::out);
virtual pos_type seekpos(pos_type sp,
ios_base::openmode which=ios_base::in|ios_base::out);
virtual basic_streambuf<charT, traits>* setbuf(char_type* s, streamsize n);
virtual int sync();
virtual int_type uflow();
virtual void imbue(const locale& loc);
virtual streamsize showmanyc();
virtual streamsize xsgetn(char_type* s, streamsize n);
virtual streamsize xsputn(const char_type* s, streamsize n);
private:
PRFileDesc* mFileDesc;
ios_base::openmode mode_;
}; // class nsFileBufferT
//========================================================================================
template<class charT, class traits>
class nsInputFileStreamT
//========================================================================================
: public basic_istream<charT, traits>
{
typedef nsFileBufferT<charT, traits> filebuf_type;
public:
typedef charT char_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef typename traits::int_type int_type;
typedef traits traits_type;
nsInputFileStreamT();
explicit nsInputFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode=ios_base::in,
PRIntn accessMode = 0x00400);
virtual ~nsInputFileStreamT();
filebuf_type* rdbuf() const;
inline bool is_open();
inline void open(
const nsUnixFilePath& inFile,
ios_base::openmode mode=ios_base::in,
PRIntn accessMode = 0x00400);
inline void close();
private:
filebuf_type mBuffer;
}; // class nsInputFileStreamT
//========================================================================================
template<class charT, class traits>
class nsOutputFileStreamT
//========================================================================================
: public basic_ostream<charT, traits>
{
typedef nsFileBufferT<charT, traits> filebuf_type;
public:
typedef charT char_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef typename traits::int_type int_type;
typedef traits traits_type;
nsOutputFileStreamT();
explicit nsOutputFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode = ios_base::out|ios_base::trunc,
PRIntn accessMode = 0x00200);
virtual ~nsOutputFileStreamT();
filebuf_type* rdbuf() const;
inline bool is_open();
inline void open(
const nsUnixFilePath& inFile,
ios_base::openmode mode = ios_base::out|ios_base::trunc,
PRIntn accessMode = 0x00200);
inline void close();
private:
filebuf_type mBuffer;
}; // class nsOutputFileStreamT
//========================================================================================
// Implementation of nsFileBufferT
//========================================================================================
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::nsFileBufferT()
: basic_streambuf<charT, traits>(), mFileDesc(NULL)
//----------------------------------------------------------------------------------------
{
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::nsFileBufferT(PRFileDesc* pfarg)
: basic_streambuf<charT, traits>(), mFileDesc(pfarg)
//----------------------------------------------------------------------------------------
{
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::~nsFileBufferT()
//----------------------------------------------------------------------------------------
{
close();
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline bool
nsFileBufferT<charT, traits>::is_open() const
//----------------------------------------------------------------------------------------
{
READ_LOCK(_mutex);
return bool(mFileDesc); // in case it is typedefed to int
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsFileBufferT<charT, traits>::filebuf_type*
nsFileBufferT<charT, traits>::open(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode
)
//----------------------------------------------------------------------------------------
{
if (mFileDesc)
return 0;
const ios_base::openmode valid_modes[]=
{
ios_base::out,
ios_base::out | ios_base::app,
ios_base::out | ios_base::trunc,
ios_base::in,
ios_base::in | ios_base::out,
ios_base::in | ios_base::out | ios_base::trunc,
// ios_base::out | ios_base::binary,
// ios_base::out | ios_base::app | ios_base::binary,
// ios_base::out | ios_base::trunc | ios_base::binary,
// ios_base::in | ios_base::binary,
// ios_base::in | ios_base::out | ios_base::binary,
// ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary,
0
};
const int nspr_modes[]={
PR_WRONLY | PR_CREATE_FILE,
PR_WRONLY | PR_CREATE_FILE | PR_APPEND,
PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
PR_RDONLY,
PR_RDONLY | PR_APPEND,
PR_RDWR | PR_CREATE_FILE,
PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE,
// "wb",
// "ab",
// "wb",
// "rb",
// "r+b",
// "w+b",
0 };
int ind=0;
while (valid_modes[ind] && valid_modes[ind] != (mode&~ios_base::ate))
++ind;
if (!nspr_modes[ind])
return 0;
WRITE_LOCK(_mutex);
mode_ = mode;
if ((mFileDesc = PR_Open(inFile, nspr_modes[ind], accessMode)) != 0)
if (mode&ios_base::ate && PR_Seek(mFileDesc, 0, PR_SEEK_END) >= 0)
close();
else
return this;
return 0;
} // nsFileBufferT<charT, traits>::open
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsFileBufferT<charT, traits>::filebuf_type* nsFileBufferT<charT, traits>::close()
//----------------------------------------------------------------------------------------
{
if (mFileDesc==PR_STDIN || mFileDesc==PR_STDOUT || mFileDesc==PR_STDERR)
return this;
WRITE_LOCK(_mutex);
return (mFileDesc && PR_Close(mFileDesc) == PR_SUCCESS) ? mFileDesc = 0, this : 0;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline int
nsFileBufferT<charT, traits>:: sync()
//----------------------------------------------------------------------------------------
{
return (mFileDesc ? (int)PR_Sync(mFileDesc) : 0);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline basic_streambuf<charT, traits>*
nsFileBufferT<charT, traits>::setbuf(char_type*, streamsize)
//----------------------------------------------------------------------------------------
{
return (!mFileDesc) ? 0 : this;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsFileBufferT<charT, traits>::int_type nsFileBufferT<charT, traits>::overflow(int_type c)
//----------------------------------------------------------------------------------------
{
#ifdef NS_EXPLICIT_FUNC_TEMPLATE_ARG
const ofacet_type& ft=use_facet<ofacet_type>(loc);
#else
const ofacet_type& ft=use_facet(loc, (ofacet_type*)0);
#endif
char_type ch = traits_type::to_char_type(c);
if (!mFileDesc)
return traits_type::eof();
if (traits_type::eq_int_type(c, traits::eof()))
return traits_type::not_eof(c);
if (ft.always_noconv())
{
PRInt32 bytesWrit1 = PR_Write(mFileDesc, &ch, sizeof(ch));
return bytesWrit1 < sizeof(ch) ? traits::eof() : c;
}
{ // <- sic!
state_type fst;
const char_type* end;
char buf[4];
char* ebuf;
result conv;
if ((conv=ft.out(fst, &ch, &ch+1, end, buf, buf+3, ebuf))==
codecvt_base::noconv)
{
PRInt32 bytesWrit2 = PR_Write(mFileDesc, &ch, sizeof(ch));
return bytesWrit2 < sizeof(ch) ? traits::eof() : c;
}
if ((conv==codecvt_base::partial)||(conv==codecvt_base::error))
return traits::eof();
*ebuf=0;
PRInt32 bytesWrit3 = strlen(buf);
return PR_Write(mFileDesc, buf, bytesWrit3) < bytesWrit3 ? traits_type::eof() : c;
}
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::int_type nsFileBufferT<charT, traits>::underflow()
//----------------------------------------------------------------------------------------
{
if (!mFileDesc)
return traits_type::eof();
char_type s;
PRInt32 request = 1;
if (1 != PR_Read(mFileDesc, &s, request))
return traits_type::eof();
PR_Seek(mFileDesc, -1, PR_SEEK_CUR);
return (int_type)s;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
streamsize nsFileBufferT<charT, traits>::xsputn(const char_type* s, streamsize n)
//----------------------------------------------------------------------------------------
{
#ifdef NS_EXPLICIT_FUNC_TEMPLATE_ARG
const ofacet_type& ft=use_facet<ofacet_type>(loc);
#else
const ofacet_type& ft=use_facet(loc, (ofacet_type*)0);
#endif
if (!mFileDesc || !n)
return 0;
if (ft.always_noconv())
{
PRInt32 bytesWrit1 = PR_Write(mFileDesc, s, sizeof(char) * size_t(n));
return bytesWrit1 < 0 ? 0 : (streamsize)bytesWrit1;
}
{ // <- sic!
state_type fst;
const char_type* end;
char buf[8];
char* ebuf;
result conv;
#ifdef NS_EXPLICIT_FUNC_TEMPLATE_ARG
if ((conv=use_facet<ofacet_type>(loc).
out(fst, s, s+n, end, buf, buf+7, ebuf))==codecvt_base::noconv)
#else
if ((conv=use_facet(loc, (ofacet_type*)0).
out(fst, s, s+n, end, buf, buf+7, ebuf))==codecvt_base::noconv)
#endif
return (streamsize)PR_Write(mFileDesc, s, sizeof(char) * size_t(n));
if ((conv==codecvt_base::partial) ||(conv==codecvt_base::error))
return 0;
*ebuf=0;
PRInt32 bytesWrit2 = strlen(buf);
bytesWrit2 = PR_Write(mFileDesc, buf, bytesWrit2);
return bytesWrit2 < 0 ? 0 : streamsize(bytesWrit2 / sizeof(char_type));
}
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::int_type
nsFileBufferT<charT, traits>::pbackfail(int_type c)
//----------------------------------------------------------------------------------------
{
if (!mFileDesc)
return traits_type::eof();
if (PR_Seek(mFileDesc, -1, PR_SEEK_CUR) < 0)
return traits_type::eof();
return (traits::eq_int_type(c, traits_type::eof())) ? traits::not_eof(c) : c;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsFileBufferT<charT, traits>::int_type nsFileBufferT<charT, traits>::uflow()
//----------------------------------------------------------------------------------------
{
if (!mFileDesc)
return traits_type::eof();
char_type s;
if (1 != PR_Read(mFileDesc, &s, 1)) // attempt to read 1 byte, confirm 1 byte
return traits_type::eof();
return (int_type)s;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline streamsize nsFileBufferT<charT, traits>::xsgetn(char_type* s, streamsize n)
//----------------------------------------------------------------------------------------
{
return mFileDesc ? (streamsize)PR_Read(mFileDesc, s, sizeof(char) * size_t(n)) : 0;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void nsFileBufferT<charT, traits>::imbue(const locale& loc_arg)
//----------------------------------------------------------------------------------------
{
loc = loc_arg;
}
template<class charT, class traits>
inline streamsize
nsFileBufferT<charT, traits>::showmanyc()
{
return (streamsize)PR_Available(mFileDesc);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsFileBufferT<charT, traits>::pos_type nsFileBufferT<charT, traits>::seekoff(
off_type off,
ios_base::seekdir way,
ios_base::openmode /* which */)
//----------------------------------------------------------------------------------------
{
if (!mFileDesc || ((way&ios_base::beg) && off<0) || ((way&ios_base::end) && off > 0))
return pos_type(-1);
PRSeekWhence poseek = PR_SEEK_CUR;
switch (way)
{
case ios_base::beg : poseek= PR_SEEK_SET;
break;
case ios_base::end : poseek= PR_SEEK_END;
break;
}
PRInt32 position = PR_Seek(mFileDesc, off, poseek);
if (position < 0)
return pos_type(-1);
return pos_type(position);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsFileBufferT<charT, traits>::pos_type
nsFileBufferT<charT, traits>::seekpos(pos_type sp, ios_base::openmode)
//----------------------------------------------------------------------------------------
{
if (!mFileDesc || sp==pos_type(-1))
return -1;
PRInt32 position = PR_Seek(mFileDesc, sp.offset(), PR_SEEK_SET);
if (position < 0)
return pos_type(-1);
return position;
}
//========================================================================================
// Implementation of nsInputFileStreamT
//========================================================================================
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsInputFileStreamT<charT, traits>::nsInputFileStreamT()
: basic_istream<charT, traits>(&mBuffer)
//----------------------------------------------------------------------------------------
{
// already inited
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsInputFileStreamT<charT, traits>::nsInputFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
: basic_istream<charT, traits>(&mBuffer)
{
// already inited
if (!mBuffer.open(inFile, openmode(mode|in), accessMode))
setstate(failbit);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsInputFileStreamT<charT, traits>::~nsInputFileStreamT()
//----------------------------------------------------------------------------------------
{
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsInputFileStreamT<charT, traits>::filebuf_type*
nsInputFileStreamT<charT, traits>::rdbuf() const
//----------------------------------------------------------------------------------------
{
return (filebuf_type*)&mBuffer;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline bool
nsInputFileStreamT<charT, traits>:: is_open()
//----------------------------------------------------------------------------------------
{
return mBuffer.is_open();
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void
nsInputFileStreamT<charT, traits>::open(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
{
if (!mBuffer.open(inFile, openmode(mode|in), accessMode))
setstate(failbit);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void nsInputFileStreamT<charT, traits>::close()
//----------------------------------------------------------------------------------------
{
if (!mBuffer.close())
setstate(failbit);
}
//========================================================================================
// Implementation of nsOutputFileStreamT
//========================================================================================
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsOutputFileStreamT<charT, traits>::nsOutputFileStreamT()
: basic_ostream<charT, traits>(&mBuffer)
//----------------------------------------------------------------------------------------
{
// already inited
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
nsOutputFileStreamT<charT, traits>::nsOutputFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
: basic_ostream<charT, traits>(&mBuffer)
{
// already inited
if (!mBuffer.open(inFile, openmode(mode|out), accessMode))
setstate(failbit);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsOutputFileStreamT<charT, traits>::~nsOutputFileStreamT()
//----------------------------------------------------------------------------------------
{
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsOutputFileStreamT<charT, traits>::filebuf_type*
nsOutputFileStreamT<charT, traits>::rdbuf() const
//----------------------------------------------------------------------------------------
{
return (filebuf_type*)&mBuffer;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline bool nsOutputFileStreamT<charT, traits>:: is_open()
//----------------------------------------------------------------------------------------
{
return mBuffer.is_open();
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void nsOutputFileStreamT<charT, traits>::open(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
{
if (!mBuffer.open(inFile, openmode(mode | out), accessMode))
setstate(failbit);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void nsOutputFileStreamT<charT, traits>:: close()
//----------------------------------------------------------------------------------------
{
if (!mBuffer.close())
setstate(failbit);
}
//========================================================================================
template<class charT, class traits>
class nsIOFileStreamT : public basic_iostream<charT, traits>
//========================================================================================
{
typedef nsFileBufferT<charT, traits> filebuf_type;
public:
typedef charT char_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef typename traits::int_type int_type;
typedef traits traits_type;
nsIOFileStreamT();
explicit nsIOFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode = ios_base::in|ios_base::out,
PRIntn accessMode = 0x00600);
virtual ~nsIOFileStreamT();
filebuf_type* rdbuf() const;
inline bool is_open();
inline void open(
const nsUnixFilePath& inFile,
ios_base::openmode mode = ios_base::in|ios_base::out,
PRIntn accessMode = 0x00600);
inline void close();
private:
filebuf_type mBuffer;
}; // class nsIOFileStreamT
//========================================================================================
// Implementation of nsIOFileStream
//========================================================================================
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsIOFileStreamT<charT, traits>::nsIOFileStreamT()
//----------------------------------------------------------------------------------------
: mBuffer(), basic_iostream<charT, traits>(&mBuffer)
{
// already inited
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsIOFileStreamT<charT, traits>::nsIOFileStreamT(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
: mBuffer(), basic_iostream<charT, traits>(&mBuffer)
{
// already inited
if (!mBuffer.open(inFile, mode, accessMode))
setstate(failbit);
}
template<class charT, class traits>
inline nsIOFileStreamT<charT, traits>::~nsIOFileStreamT()
{
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline nsIOFileStreamT<charT, traits>::filebuf_type*
nsIOFileStreamT<charT, traits>::rdbuf() const
//----------------------------------------------------------------------------------------
{
return (filebuf_type*)&mBuffer;
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline bool
nsIOFileStreamT<charT, traits>::is_open()
//----------------------------------------------------------------------------------------
{
return mBuffer.is_open();
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void
nsIOFileStreamT<charT, traits>::open(
const nsUnixFilePath& inFile,
ios_base::openmode mode,
PRIntn accessMode)
//----------------------------------------------------------------------------------------
{
if (!mBuffer.open(inFile, mode, accessMode))
setstate(failbit);
}
//----------------------------------------------------------------------------------------
template<class charT, class traits>
inline void
nsIOFileStreamT<charT, traits>::close()
//----------------------------------------------------------------------------------------
{
if (!mBuffer.close())
setstate(failbit);
}
//========================================================================================
// Specializations of the stream templates
//========================================================================================
typedef nsFileBufferT<char, char_traits<char> > nsFileBuffer;
typedef nsInputFileStreamT<char, char_traits<char> > nsInputFileStream;
typedef nsOutputFileStreamT<char, char_traits<char> > nsOutputFileStream;
typedef nsIOFileStreamT<char, char_traits<char> > nsIOFileStream;
#ifdef NS_USING_WIDE_CHAR
typedef nsFileBufferT<wchar_t, char_traits<wchar_t> > nsWideFileBuffer;
typedef nsInputFileStreamT<wchar_t, char_traits<wchar_t> > nsWideInputFileStream;
typedef nsOutputFileStreamT<wchar_t, char_traits<wchar_t> > nsWideOutputFileStream;
typedef nsIOFileStreamT<wchar_t, char_traits<wchar_t> > nsWideIOFileStream;
#endif // NS_USING_WIDE_CHAR
#endif /* _STREAM_H_ */