libio/fstream.cc

   1 /* This is part of libio/iostream, providing -*- C++ -*- input/output.
   2 Copyright (C) 1993 Free Software Foundation
   3
   4 This file is part of the GNU IO Library.  This library is free
   5 software; you can redistribute it and/or modify it under the
   6 terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this library; see the file COPYING.  If not, write to the Free
  17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 As a special exception, if you link this library with files
  20 compiled with a GNU compiler to produce an executable, this does not cause
  21 the resulting executable to be covered by the GNU General Public License.
  22 This exception does not however invalidate any other reasons why
  23 the executable file might be covered by the GNU General Public License.
  24
  25 Written by Per Bothner (bothner@cygnus.com). */
  26
  27 #ifdef __GNUG__
  28 #pragma implementation
  29 #endif
  30 #define _STREAM_COMPAT
  31 extern "C" {
  32 #include "libioP.h"
  33 }
  34 #include <fstream.h>
  35
  36 inline void
  37 fstreambase::__fb_init()
  38 {
  39 #ifdef _IO_NEW_STREAMS
  40 #if !_IO_UNIFIED_JUMPTABLES
  41   /* Uses the _IO_file_jump jumptable, for eficiency. */
  42   __my_fb._jumps = &_IO_file_jumps;
  43   __my_fb._vtable() = builtinbuf_vtable;
  44 #endif
  45   init (&__my_fb);
  46 #else
  47   init(filebuf::__new());
  48   _flags &= ~ios::dont_close;
  49 #endif
  50 }
  51
  52 fstreambase::fstreambase()
  53 {
  54   __fb_init ();
  55 }
  56
  57 fstreambase::fstreambase(int fd)
  58 {
  59   __fb_init ();
  60   _IO_file_attach(rdbuf(), fd);
  61 }
  62
  63 fstreambase::fstreambase(const char *name, int mode, int prot)
  64 {
  65   __fb_init ();
  66   if (!rdbuf()->open(name, mode, prot))
  67     set(ios::badbit);
  68 }
  69
  70 fstreambase::fstreambase(int fd, char *p, int l)
  71 {
  72 #ifdef _IO_NEW_STREAMS
  73   __fb_init ();
  74 #else
  75   init(filebuf::__new());
  76 #endif
  77   _IO_file_attach(rdbuf(), fd);
  78   _IO_file_setbuf(rdbuf(), p, l);
  79 }
  80
  81 void fstreambase::open(const char *name, int mode, int prot)
  82 {
  83     clear();
  84     if (!rdbuf()->open(name, mode, prot))
  85         set(ios::badbit);
  86 }
  87
  88 void fstreambase::close()
  89 {
  90     if (!rdbuf()->close())
  91         set(ios::failbit);
  92 }
  93
  94 void fstreambase::attach(int fd)
  95 {
  96   if (!rdbuf()->attach(fd))
  97     set(ios::failbit);
  98 }
  99
 100 #if 0
 101 static int mode_to_sys(enum open_mode mode)
 102 {
 103     return O_WRONLY;
 104 }
 105
 106 static char* fopen_cmd_arg(io_mode i)
 107 {
 108     return "w";
 109 }
 110 #endif