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Annotation of GNUtools/libg++/libio/iofdopen.c, revision 1.1.1.1

1.1       root        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 GNU CC; see the file COPYING.  If not, write to
                     17: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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: #include "libioP.h"
                     26: 
                     27: _IO_FILE *
                     28: _IO_fdopen (fd, mode)
                     29:      int fd;
                     30:      const char *mode;
                     31: {
                     32:   int read_write;
                     33:   struct _IO_FILE_plus *fp;
                     34: 
                     35:   switch (*mode++)
                     36:     {
                     37:     case 'r':
                     38:       read_write = _IO_NO_WRITES;
                     39:       break;
                     40:     case 'w':
                     41:       read_write = _IO_NO_READS;
                     42:       break;
                     43:     case 'a':
                     44:       read_write = _IO_NO_READS|_IO_IS_APPENDING;
                     45:       break;
                     46:     default:
                     47: #ifdef EINVAL
                     48:       errno = EINVAL;
                     49: #endif
                     50:       return NULL;
                     51:   }
                     52:   if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
                     53:     read_write &= _IO_IS_APPENDING;
                     54: 
                     55:   fp = (struct _IO_FILE_plus*)malloc(sizeof(struct _IO_FILE_plus));
                     56:   if (fp == NULL)
                     57:     return NULL;
                     58:   _IO_init(&fp->_file, 0);
                     59:   fp->_file._jumps = &_IO_file_jumps;
                     60:   _IO_file_init(&fp->_file);
                     61:   fp->_vtable = NULL;
                     62:   if (_IO_file_attach(&fp->_file, fd) == NULL)
                     63:     {
                     64:       _IO_un_link(&fp->_file);
                     65:       free (fp);
                     66:       return NULL;
                     67:     }
                     68:   fp->_file._flags &= ~_IO_DELETE_DONT_CLOSE;
                     69: 
                     70:   fp->_file._IO_file_flags = 
                     71:     _IO_mask_flags(&fp->_file, read_write,
                     72:                   _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
                     73: 
                     74:   return (_IO_FILE*)fp;
                     75: }

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