1 files changed, 163 insertions, 0 deletions
diff --git a/libio/iofopncook.c b/libio/iofopncook.c
new file mode 100644
index 0000000000..0b57ecd344
--- /dev/null
+++ b/libio/iofopncook.c
@@ -0,0 +1,163 @@
+/*
+Copyright (C) 1993, 1995 Free Software Foundation
+
+This file is part of the GNU IO Library.  This library is free
+software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+#include <libioP.h>
+#include <stdlib.h>
+
+struct _IO_cookie_file {
+  struct _IO_FILE file;
+  const void *vtable;
+  void *cookie;
+  _IO_cookie_io_functions_t io_functions;
+};
+
+
+static _IO_ssize_t
+_IO_cookie_read (fp, buf, size)
+     register _IO_FILE* fp;
+     void* buf;
+     _IO_ssize_t size;
+{
+  struct _IO_cookie_file *cfile = (struct _IO_cookie_file *) fp;
+
+  if (cfile->io_functions.read == NULL)
+    return -1;
+
+  return cfile->io_functions.read (cfile->cookie, buf, size);
+}
+
+static _IO_ssize_t
+_IO_cookie_write (fp, buf, size)
+     register _IO_FILE* fp;
+     const void* buf;
+     _IO_ssize_t size;
+{
+  struct _IO_cookie_file *cfile = (struct _IO_cookie_file *) fp;
+
+  if (cfile->io_functions.write == NULL)
+    return -1;
+
+  return cfile->io_functions.write (cfile->cookie, buf, size);
+}
+
+static _IO_fpos_t
+_IO_cookie_seek (fp, offset, dir)
+     _IO_FILE *fp;
+     _IO_off_t offset;
+     int dir;
+{
+  struct _IO_cookie_file *cfile = (struct _IO_cookie_file *) fp;
+  _IO_fpos_t pos;
+
+  if (cfile->io_functions.seek == NULL)
+    return _IO_pos_BAD;
+
+  pos = _IO_pos_0;
+  _IO_pos_adjust (pos, offset);
+
+  if (cfile->io_functions.seek (cfile->cookie, pos, dir))
+    return _IO_pos_BAD;
+
+  return pos;
+}
+
+static int
+_IO_cookie_close (fp)
+     _IO_FILE* fp;
+{
+  struct _IO_cookie_file *cfile = (struct _IO_cookie_file *) fp;
+
+  if (cfile->io_functions.close == NULL)
+    return 0;
+
+  return cfile->io_functions.close (cfile->cookie);
+}
+
+
+static struct _IO_jump_t _IO_cookie_jumps = {
+  JUMP_INIT_DUMMY,
+  JUMP_INIT(finish, _IO_file_finish),
+  JUMP_INIT(overflow, _IO_file_overflow),
+  JUMP_INIT(underflow, _IO_file_underflow),
+  JUMP_INIT(uflow, _IO_default_uflow),
+  JUMP_INIT(pbackfail, _IO_default_pbackfail),
+  JUMP_INIT(xsputn, _IO_file_xsputn),
+  JUMP_INIT(xsgetn, _IO_default_xsgetn),
+  JUMP_INIT(seekoff, _IO_file_seekoff),
+  JUMP_INIT(seekpos, _IO_default_seekpos),
+  JUMP_INIT(setbuf, _IO_file_setbuf),
+  JUMP_INIT(sync, _IO_file_sync),
+  JUMP_INIT(doallocate, _IO_file_doallocate),
+  JUMP_INIT(read, _IO_cookie_read),
+  JUMP_INIT(write, _IO_cookie_write),
+  JUMP_INIT(seek, _IO_cookie_seek),
+  JUMP_INIT(close, _IO_cookie_close),
+  JUMP_INIT(stat, _IO_default_stat)
+};
+
+
+_IO_FILE *
+fopencookie (cookie, mode, io_functions)
+     void *cookie;
+     const char *mode;
+     _IO_cookie_io_functions_t io_functions;
+{
+  int read_write;
+  struct _IO_cookie_file *cfile;
+
+  switch (*mode++)
+    {
+    case 'r':
+      read_write = _IO_NO_WRITES;
+      break;
+    case 'w':
+      read_write = _IO_NO_READS;
+      break;
+    case 'a':
+      read_write = _IO_NO_READS|_IO_IS_APPENDING;
+      break;
+    default:
+      return NULL;
+  }
+  if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
+    read_write &= _IO_IS_APPENDING;
+
+  cfile  = (struct _IO_cookie_file *) malloc (sizeof (struct _IO_cookie_file));
+  if (cfile == NULL)
+    return NULL;
+
+  _IO_init (&cfile->file, 0);
+  _IO_JUMPS (&cfile->file) = &_IO_cookie_jumps;
+  cfile->cookie = cookie;
+  cfile->io_functions = io_functions;
+
+  _IO_file_init(&cfile->file);
+
+  cfile->file._IO_file_flags =
+    _IO_mask_flags (&cfile->file, read_write,
+		    _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
+
+  return &cfile->file;
+}
+