# HG changeset patch
# User jwe
# Date 953286555 0
# Node ID fcdf0897e7051d1414230ff4b1dbc3e97217b020
# Parent  b1ff6597576f31a51dca1575b97766be0640098f
[project @ 2000-03-17 09:49:14 by jwe]

diff --git a/src/c_file_ptr_stream.cc b/src/c_file_ptr_stream.cc
new file mode 100644
--- /dev/null
+++ b/src/c_file_ptr_stream.cc
@@ -0,0 +1,126 @@
+/*
+
+Copyright (C) 2000 John W. Eaton
+
+This file is part of Octave.
+
+Octave 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.
+
+Octave 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 Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "c_file_ptr_stream.h"
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+c_file_ptr_buf::~c_file_ptr_buf (void) { fflush (f); }
+
+// XXX FIXME XXX -- I'm sure there is room for improvement here...
+
+int
+c_file_ptr_buf::overflow (int c)
+{
+  return (c != EOF) ? fputc (c, f) : fflush (f);
+}
+
+int
+c_file_ptr_buf::underflow (void)
+{
+  return fgetc (f);
+}
+
+int
+c_file_ptr_buf::uflow (void)
+{
+  return underflow ();
+}
+
+int
+c_file_ptr_buf::pbackfail (int c)
+{
+  return (c != EOF) ? ungetc (c, f) : EOF;
+}
+
+std::streamsize
+c_file_ptr_buf::xsputn (const char* s, std::streamsize n)
+{
+  return fwrite (s, 1, n, f);
+}
+
+std::streamsize
+c_file_ptr_buf::xsgetn (char *s, std::streamsize n)
+{
+  return fread (s, 1, n, f);
+}
+
+static inline int
+seekdir_to_whence (std::ios::seekdir dir)
+{
+  return ((dir == ios::beg) ? SEEK_SET :
+	  (dir == ios::cur) ? SEEK_CUR :
+	  (dir == ios::end) ? SEEK_END :
+	  dir);
+}
+
+std::streampos
+c_file_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir,
+			 std::ios::openmode)
+{
+  // XXX FIXME XXX -- is this the right thing to do?
+
+  fseek (f, offset, seekdir_to_whence (dir));
+
+  return ftell (f);
+}
+
+std::streampos
+c_file_ptr_buf::seekpos (std::streampos offset, std::ios::openmode)
+{
+  // XXX FIXME XXX -- is this the right thing to do?
+
+  fseek (f, offset, SEEK_SET);
+
+  return ftell (f);
+}
+
+int
+c_file_ptr_buf::sync (void)
+{
+  return 0;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/
+
diff --git a/src/c_file_ptr_stream.h b/src/c_file_ptr_stream.h
new file mode 100644
--- /dev/null
+++ b/src/c_file_ptr_stream.h
@@ -0,0 +1,104 @@
+/*
+
+Copyright (C) 2000 John W. Eaton
+
+This file is part of Octave.
+
+Octave 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.
+
+Octave 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 Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_c_file_ptr_stream_h)
+#define octave_c_file_ptr_stream_h 1
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#include <iostream.h>
+#include <stdio.h>
+
+class
+c_file_ptr_buf : public streambuf
+{
+protected:
+
+  FILE *f;
+
+public:
+
+  FILE* stdiofile (void) const { return f; }
+
+  c_file_ptr_buf (FILE *f_arg) : streambuf (), f (f_arg) { }
+
+  ~c_file_ptr_buf (void);
+
+  int overflow (int);
+
+  int underflow (void);
+
+  int uflow (void);
+
+  int pbackfail (int);
+
+  std::streamsize xsputn (const char*, std::streamsize);
+
+  std::streamsize xsgetn (char *, std::streamsize);
+
+  std::streampos seekoff (std::streamoff, std::ios::seekdir,
+			  std::ios::openmode = ios::in | ios::out);
+  
+  std::streampos seekpos (std::streampos,
+			  std::ios::openmode = ios::in | ios::out);
+
+  int sync (void);
+};
+
+class
+i_c_file_ptr_stream : public istream
+{
+private:
+
+  c_file_ptr_buf f;
+
+public:
+
+  i_c_file_ptr_stream (FILE* f_arg) : istream (), f (f_arg) { init (&f); }
+
+  c_file_ptr_buf *rdbuf (void) { return &f; }
+};
+
+class
+o_c_file_ptr_stream : public ostream
+{
+private:
+
+  c_file_ptr_buf f;
+
+public:
+
+  o_c_file_ptr_stream (FILE* f_arg) : ostream (), f (f_arg) { init (&f); }
+
+  c_file_ptr_buf *rdbuf (void) { return &f; }
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/
+