/*

 * Portions Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

 *

 * Copyright (c) 1999

 * Silicon Graphics Computer Systems, Inc.

 *

 * Copyright (c) 1999

 * Boris Fomitchev

 *

 * This material is provided "as is", with absolutely no warranty expressed

 * or implied. Any use is at your own risk.

 *

 * Permission to use or copy this software for any purpose is hereby granted

 * without fee, provided the above notices are retained on all copies.

 * Permission to modify the code and to distribute modified code is granted,

 * provided the above notices are retained, and a notice that the code was

 * modified is included with the above copyright notice.

 *

 */

#include "stlport_prefix.h"

#if defined  (__SUNPPRO_CC)  && !defined (_STLP_NO_NEW_C_HEADERS)

#  include <time.h>

// For sunpro, it chokes if time.h is included through stat.h

#endif

#include <fstream>

#ifdef __CYGWIN__

#  define __int64 long long

#endif

#if defined (_STLP_USE_UNIX_IO)

extern "C" {

// open/close/read/write

#  include <sys/stat.h>           // For stat

#  if !defined (_CRAY) && ! defined (__EMX__)

#    include <sys/mman.h>           // For mmap

#  endif

//  on HP-UX 11, this one contradicts with pthread.h on pthread_atfork, unless we unset this

#  if defined (__hpux) && defined (__GNUC__)

#    undef _INCLUDE_POSIX1C_SOURCE

#  endif

#  include <unistd.h>

#  include <fcntl.h>

}

#  ifdef __APPLE__

#    include <sys/sysctl.h>

#  endif

#elif defined (_STLP_USE_WIN32_IO)

#  define WIN32_LEAN_AND_MEAN

#  include <windows.h>

#  ifdef __BORLANDC__

#      include <cfcntl.h>            // For _O_RDONLY, etc

#    include <sys/stat.h>         // For _fstat

#  elif !defined(_STLP_WCE)

#    include <io.h>               // For _get_osfhandle

#    include <fcntl.h>            // For _O_RDONLY, etc

#    include <sys/stat.h>         // For _fstat

#  endif

#  define _TEXTBUF_SIZE 0x1000

#elif defined (_STLP_USE_UNIX_EMULATION_IO)

#  if defined( __MSL__ )

#    include <unistd.h>

#  else

#    include <io.h>

#  endif

#  include <fcntl.h>

#  include <sys/stat.h>

#elif defined (_STLP_USE_STDIO_IO)

#  include <cstdio>

#  if !(defined(__MRC__) || defined(__SC__) || defined(__ISCPP__) )

extern "C" {

#    include <sys/stat.h>

}

#  endif

#  if defined( __MSL__ )

#    include <unix.h>

#  endif

#  if defined(__ISCPP__)

#    include <c_locale_is/filestat.h>

#  endif

#  if (defined(__BEOS__) && defined(__INTEL__)) || defined (__SYMBIAN32__)

#    include <fcntl.h>

#    include <sys/stat.h>         // For _fstat

#    define _S_IREAD S_IREAD

#    define _S_IWRITE S_IWRITE

#    define _S_IFREG S_IFREG

#  endif

#else

#  error "Configure i/o !"

#endif

#if defined (_STLP_USE_WIN32_IO)

const _STLP_fd INVALID_STLP_FD = INVALID_HANDLE_VALUE;

#  if !defined (INVALID_SET_FILE_POINTER)

#    define INVALID_SET_FILE_POINTER 0xffffffff

#  endif

#elif defined (_STLP_USE_UNIX_EMULATION_IO) || defined (_STLP_USE_STDIO_IO) || defined (_STLP_USE_UNIX_IO)

const _STLP_fd INVALID_STLP_FD = -1;

#else

#  error "Configure i/o !"

#endif

// map permission masks

#if defined (_STLP_USE_UNIX_EMULATION_IO) || defined (_STLP_USE_STDIO_IO)

#  ifndef S_IRUSR

#    define S_IRUSR _S_IREAD

#    define S_IWUSR _S_IWRITE

#    define S_IRGRP _S_IREAD

#    define S_IWGRP _S_IWRITE

#    define S_IROTH _S_IREAD

#    define S_IWOTH _S_IWRITE

#  endif

#  ifndef O_RDONLY

#    define O_RDONLY _O_RDONLY

#    define O_WRONLY _O_WRONLY

#    define O_RDWR   _O_RDWR

#    define O_APPEND _O_APPEND

#    define O_CREAT  _O_CREAT

#    define O_TRUNC  _O_TRUNC

#    define O_TEXT   _O_TEXT

#    define O_BINARY _O_BINARY

#  endif

#  ifdef __MSL__

#    define _O_TEXT 0x0

#    if !defined( O_TEXT )

#      define O_TEXT _O_TEXT

#    endif

#    define _S_IFREG S_IFREG

#    define S_IREAD        S_IRUSR

#    define S_IWRITE       S_IWUSR

#    define S_IEXEC        S_IXUSR

#    define _S_IWRITE S_IWRITE

#    define _S_IREAD S_IREAD

#    define _open open

#    define _lseek lseek

#    define _close close

#    define _read read

#    define _write write

#  endif

#endif

#ifndef O_ACCMODE

#  define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)

#endif

#include "fstream_impl.h"

#ifdef _STLP_LONG_LONG

#  define ULL(x) ((unsigned _STLP_LONG_LONG)x)

#elif defined(__MRC__) || defined(__SC__)    //*TY 02/25/2000 - added support for MPW compilers

#  include <Math64.h>

#  define ULL(x) (U64SetU(x))

#elif defined(__ISCPP__)

#  include "uint64.h"

#elif defined(__SYMBIAN32__)

#  include <sys/types.h>

#else

#  error "there should be some long long type on the system!"

#endif

#if defined(__SYMBIAN32__WSD__) 

# include "libstdcppwsd.h"

_STLP_DECLSPEC size_t& get_fstream_Filebuf_Base_GetPageSize()

{

	return get_libcpp_wsd().fstream_Filebuf_base_M_page_size;

}

void filebuf_page_size_init()

{

	get_fstream_Filebuf_Base_GetPageSize() = 4096;	

}

#endif

_STLP_BEGIN_NAMESPACE

// Compare with streamoff definition in stl/char_traits.h!

#ifdef _STLP_USE_DEFAULT_FILE_OFFSET

#  define FOPEN fopen

#  define FSEEK fseek

#  define FSTAT fstat

#  define STAT  stat

#  define FTELL ftell

#  define LSEEK lseek

#  define MMAP  mmap

#  define OPEN  open

#elif defined(_LARGEFILE_SOURCE) || defined(_LARGEFILE64_SOURCE) /* || defined(__USE_FILE_OFFSET64) */ \

      /* || (defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)) */ /* || defined(__sgi) */

#  define FOPEN fopen64

#  define FSEEK fseeko64

#  define FSTAT fstat64

#  define STAT  stat64

#  define FTELL ftello64

#  define LSEEK lseek64

#  define MMAP  mmap64

#  define OPEN  open64

#else

#  define OPEN  open

#  define FSEEK fseek

#  define FSTAT fstat

#  define STAT  stat

#  define FTELL ftell

#  define LSEEK lseek

#  define MMAP  mmap

#  define OPEN  open

#endif

#ifdef _STLP_USE_UNIX_IO

#  ifndef MAP_FAILED /* MMAP failure return code */

#    define MAP_FAILED -1

#  endif

#elif defined (_STLP_USE_UNIX_EMULATION_IO)

#  define LSEEK _lseek

#endif

#if !defined(__MSL__) && !defined(__MRC__) && !defined(__SC__) && !defined(_STLP_WCE)    //*TY 04/15/2000 - exclude mpw compilers also

static ios_base::openmode flag_to_openmode(int mode) {

  ios_base::openmode ret = ios_base::__default_mode;

  switch(mode & O_ACCMODE) {

  case O_RDONLY:

    ret = ios_base::in; break;

  case O_WRONLY:

    ret = ios_base::out; break;

  case O_RDWR:

    ret = ios_base::in | ios_base::out; break;

  }

  if (mode & O_APPEND)

    ret |= ios_base::app;

#  if defined (_STLP_USE_WIN32_IO)

  if (mode & O_BINARY)

    ret |= ios_base::binary;

#  endif

  return ret;

}

#endif /* MSL */

_STLP_MOVE_TO_PRIV_NAMESPACE

// Helper functions for _Filebuf_base.

bool __is_regular_file(_STLP_fd fd) {

#if defined (_STLP_UNIX)

  struct STAT buf;

  return FSTAT(fd, &buf) == 0 && S_ISREG(buf.st_mode);

#elif defined(__MRC__) || defined(__SC__)    //*TY 02/25/2000 - added support for MPW compilers

#  pragma unused(fd)

  return true;  // each file is a regular file under mac os, isn't it? (we don't have fstat())

#elif defined(_STLP_USE_UNIX_EMULATION_IO) || defined (_STLP_USE_STDIO_IO)

  struct STAT buf;

  return FSTAT(fd, &buf) == 0 && (buf.st_mode & _S_IFREG) != 0 ;

#elif defined (_STLP_USE_WIN32_IO) && !defined(_STLP_WCE)

  return (GetFileType(fd) & ~FILE_TYPE_REMOTE) == FILE_TYPE_DISK;

#else

  (void)fd;    // dwa 4/27/00 - suppress unused parameter warning

  return false;

#endif

}

// Number of characters in the file.

streamoff __file_size(_STLP_fd fd) {

  streamoff ret = 0;

#if defined (_STLP_UNIX)

  struct STAT buf;

  if (FSTAT(fd, &buf) == 0 && S_ISREG(buf.st_mode))

    ret = buf.st_size > 0 ? buf.st_size : 0;

#elif defined(__MRC__) || defined(__SC__)    //*TY 02/25/2000 - added support for MPW compilers

#  pragma unused(fd)

#elif defined(_STLP_USE_UNIX_EMULATION_IO) || defined (_STLP_USE_STDIO_IO)

  struct STAT buf;

  if (FSTAT(fd, &buf) == 0 && (buf.st_mode & _S_IFREG) != 0)

    ret = buf.st_size > 0 ? buf.st_size : 0;

#elif defined (_STLP_USE_WIN32_IO)

 LARGE_INTEGER li;

 li.LowPart = GetFileSize(fd, (unsigned long*) &li.HighPart);

 if (li.LowPart != INVALID_FILE_SIZE || GetLastError() == NO_ERROR)

   ret = li.QuadPart;

#else

  (void)fd;    // dwa 4/27/00 - suppress unused parameter warning

#endif

  return ret;

}

_STLP_MOVE_TO_STD_NAMESPACE

// Visual C++ and Intel use this, but not Metrowerks

// Also MinGW, msvcrt.dll (but not crtdll.dll) dependent version

#if (!defined (__MSL__) && !defined (_STLP_WCE) && defined (_STLP_MSVC_LIB) && defined (_WIN32)) || \

    (defined (__MINGW32__) && defined (__MSVCRT__) && !(defined (__SYMBIAN32__) && defined(__GCCXML__)) )

// fcntl(fileno, F_GETFL) for Microsoft library

// 'semi-documented' defines:

#  define IOINFO_L2E          5

#  define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)

#  define _pioinfo(i) ( __pioinfo[(i) >> IOINFO_L2E] + \

              ((i) & (IOINFO_ARRAY_ELTS - 1)) )

#  define FAPPEND         0x20    // O_APPEND flag

#  define FTEXT           0x80    // O_TEXT flag

// end of 'semi-documented' defines

// 'semi-documented' internal structure

extern "C" {

  struct ioinfo {

    long osfhnd;    // the real os HANDLE

    char osfile;    // file handle flags

    char pipech;    // pipe buffer

#  if defined (_MT)

    // multi-threaded locking

    int lockinitflag;

    CRITICAL_SECTION lock;

#  endif  /* _MT */

  };

#  if defined (__MINGW32__)

 __MINGW_IMPORT ioinfo * __pioinfo[];

#  else

  extern _CRTIMP ioinfo * __pioinfo[];

#  endif

} // extern "C"

// end of 'semi-documented' declarations

static ios_base::openmode _get_osfflags(int fd, HANDLE oshandle) {

  char dosflags = 0;

  if (fd >= 0)

    dosflags = _pioinfo(fd)->osfile;

  //else

    //the file will be considered as open in binary mode with no append attribute

  // end of 'semi-documented' stuff

  int mode = 0;

  if (dosflags & FAPPEND)

    mode |= O_APPEND;

  if (dosflags & FTEXT)

    mode |= O_TEXT;

  else

    mode |= O_BINARY;

  // For Read/Write access we have to guess

  DWORD dummy, dummy2;

  BOOL writeOk = WriteFile(oshandle, &dummy2, 0, &dummy, 0);

  BOOL readOk = ReadFile(oshandle, &dummy2, 0, &dummy, NULL);

  if (writeOk && readOk)

    mode |= O_RDWR;

  else if (readOk)

    mode |= O_RDONLY;

  else

    mode |= O_WRONLY;

  return flag_to_openmode(mode);

}

#elif defined (__DMC__)

#  define FHND_APPEND 0x04

#  define FHND_DEVICE 0x08

#  define FHND_TEXT   0x10

extern "C" unsigned char __fhnd_info[_NFILE];

static ios_base::openmode _get_osfflags(int fd, HANDLE oshandle) {

  int mode = 0;

  if (__fhnd_info[fd] & FHND_APPEND)

    mode |= O_APPEND;

  if (__fhnd_info[fd] & FHND_TEXT == 0)

    mode |= O_BINARY;

  for (FILE *fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) {

    if ((fileno(fp) == fd) && (fp->_flag & (_IOREAD | _IOWRT | _IORW))) {

      const int osflags = fp->_flag;

      if ((osflags & _IOREAD) && !(osflags & _IOWRT) && !(osflags & _IORW))

        mode |= O_RDONLY;

      else if ((osflags & _IOWRT) && !(osflags & _IOREAD) && !(osflags & _IORW))

        mode |= O_WRONLY;

      else

        mode |= O_RDWR;

      break;

    }

  }

  return flag_to_openmode(mode);

}

#endif

#if !defined(__SYMBIAN32__WSD__)

size_t _Filebuf_base::_M_page_size = 4096;

#endif //__SYMBIAN32__WSD__

_STLP_DECLSPEC _Filebuf_base::_Filebuf_base()

  : _M_file_id(INVALID_STLP_FD),

#if defined (_STLP_USE_WIN32_IO)

    _M_view_id(0),

#endif

    _M_openmode(0),

    _M_is_open(false),

    _M_should_close(false)

{}

void _Filebuf_base::_S_initialize() {

#if defined (_STLP_UNIX)  && !defined (__DJGPP) && !defined (_CRAY)

#  if defined (__APPLE__)

  int mib[2];

  size_t pagesize, len;

  mib[0] = CTL_HW;

  mib[1] = HW_PAGESIZE;

  len = sizeof(pagesize);

  sysctl(mib, 2, &pagesize, &len, NULL, 0);

  _M_page_size = pagesize;

#  elif defined (__DJGPP) && defined (_CRAY)

  _M_page_size = BUFSIZ;

#  else

  _M_page_size = sysconf(_SC_PAGESIZE);

#  endif

#elif defined (_STLP_USE_WIN32_IO)

  SYSTEM_INFO SystemInfo;

  GetSystemInfo(&SystemInfo);

  _M_page_size = SystemInfo.dwPageSize;

  // might be .dwAllocationGranularity

#endif

}

// Return the size of the file.  This is a wrapper for stat.

// Returns zero if the size cannot be determined or is ill-defined.

_STLP_DECLSPEC streamoff _Filebuf_base::_M_file_size() {

  return _STLP_PRIV __file_size(_M_file_id);

}

_STLP_DECLSPEC bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode,

                            long permission) {

  _STLP_fd file_no;

  if (_M_is_open)

    return false;

#if defined (_STLP_USE_UNIX_IO) || defined (_STLP_USE_UNIX_EMULATION_IO)

  int flags = 0;

  // Unix makes no distinction between text and binary files.

  switch(openmode & (~ios_base::ate & ~ios_base::binary)) {

  case ios_base::out:

  case ios_base::out | ios_base::trunc:

    flags = O_WRONLY | O_CREAT | O_TRUNC;

    break;

  case ios_base::out | ios_base::app:

    flags = O_WRONLY | O_CREAT | O_APPEND;

    break;

  case ios_base::in:

    flags = O_RDONLY;

    permission = 0;             // Irrelevant unless we're writing.

    break;

  case ios_base::in | ios_base::out:

    flags = O_RDWR;

    break;

  case ios_base::in | ios_base::out | ios_base::trunc:

    flags = O_RDWR | O_CREAT | O_TRUNC;

    break;

  default:                      // The above are the only combinations of

    return false;               // flags allowed by the C++ standard.

  }

#  if defined (_STLP_USE_UNIX_EMULATION_IO)

  if (openmode & ios_base::binary)

    flags |= O_BINARY;

  else

    flags |= O_TEXT;

  file_no = _open(name, flags, permission);

#  else

  file_no = OPEN(name, flags, permission);

#  endif /* _STLP_USE_UNIX_EMULATION_IO */

  if (file_no < 0)

    return false;

  _M_is_open = true;

  if (openmode & ios_base::ate)

    if (LSEEK(file_no, 0, SEEK_END) == -1)

      _M_is_open = false;

#elif defined (_STLP_USE_STDIO_IO)

  // use FILE-based i/o

  const char* flags;

  switch(openmode & (~ios_base::ate)) {

  case ios_base::out:

  case ios_base::out | ios_base::trunc:

    flags = "w";

    break;

  case ios_base::out | ios_base::binary:

  case ios_base::out | ios_base::trunc | ios_base::binary:

    flags = "wb";

    break;

  case ios_base::out | ios_base::app:

    flags = "a";