libio/SFile.cc

   1 /*
   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 /*
  26 Copyright (C) 1988 Free Software Foundation
  27     written by Doug Lea (dl@rocky.oswego.edu)
  28
  29 This file is part of the GNU C++ Library.  This library is free
  30 software; you can redistribute it and/or modify it under the terms of
  31 the GNU Library General Public License as published by the Free
  32 Software Foundation; either version 2 of the License, or (at your
  33 option) any later version.  This library is distributed in the hope
  34 that it will be useful, but WITHOUT ANY WARRANTY; without even the
  35 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  36 PURPOSE.  See the GNU Library General Public License for more details.
  37 You should have received a copy of the GNU Library General Public
  38 License along with this library; if not, write to the Free Software
  39 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  40 */
  41
  42 #ifdef __GNUG__
  43 #pragma implementation
  44 #endif
  45 #include <SFile.h>
  46
  47 SFile::SFile(const char *filename, int size, int mode, int prot)
  48 : fstream(filename, mode, prot)
  49 {
  50   sz = size;
  51 }
  52
  53 SFile::SFile(int fd, int size)
  54 : fstream(fd)
  55 {
  56   sz = size;
  57 }
  58
  59 void SFile::open(const char *name, int size, int mode, int prot)
  60 {
  61     fstream::open(name, mode, prot);
  62     sz = size;
  63 }
  64
  65 SFile& SFile::get(void* x)
  66 {
  67     read(x, sz);
  68     return *this;
  69 }
  70
  71 SFile& SFile::put(void* x)
  72 {
  73     write(x, sz);
  74     return *this;
  75 }
  76
  77 SFile& SFile::operator[](long i)
  78 {
  79     if (rdbuf()->pubseekoff(i * sz, ios::beg) == EOF)
  80         set(ios::badbit);
  81     return *this;
  82 }