Forgot files from r153825

From-SVN: r153827

1 files changed, 81 insertions, 0 deletions

diff --git a/libgfortran/io/fbuf.h b/libgfortran/io/fbuf.h
new file mode 100644
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+++ b/libgfortran/io/fbuf.h
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+/* Copyright (C) 2009
+   Free Software Foundation, Inc.
+   Contributed by Janne Blomqvist
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran 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 3, or (at your option)
+any later version.
+
+Libgfortran 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "io.h"
+
+#ifndef GFOR_FBUF_H
+#define GFOR_FBUF_H
+
+
+/* Formatting buffer. This is a temporary scratch buffer used by
+   formatted read and writes.  After every formatted I/O statement,
+   this buffer is flushed. This buffer is needed since not all devices
+   are seekable, and T or TL edit descriptors require moving backwards
+   in the record.  However, advance='no' complicates the situation, so
+   the buffer must only be partially flushed from the end of the last
+   flush until the current position in the record. */
+
+struct fbuf
+{
+  char *buf;			/* Start of buffer.  */
+  int len;			/* Length of buffer.  */
+  int act;			/* Active bytes in buffer.  */
+  int pos;			/* Current position in buffer.  */
+};
+
+extern void fbuf_init (gfc_unit *, int);
+internal_proto(fbuf_init);
+
+extern void fbuf_destroy (gfc_unit *);
+internal_proto(fbuf_destroy);
+
+extern int fbuf_reset (gfc_unit *);
+internal_proto(fbuf_reset);
+
+extern char * fbuf_alloc (gfc_unit *, int);
+internal_proto(fbuf_alloc);
+
+extern int fbuf_flush (gfc_unit *, unit_mode);
+internal_proto(fbuf_flush);
+
+extern int fbuf_seek (gfc_unit *, int, int);
+internal_proto(fbuf_seek);
+
+extern char * fbuf_read (gfc_unit *, int *);
+internal_proto(fbuf_read);
+
+/* Never call this function, only use fbuf_getc().  */
+extern int fbuf_getc_refill (gfc_unit *);
+internal_proto(fbuf_getc_refill);
+
+static inline int
+fbuf_getc (gfc_unit * u)
+{
+  if (u->fbuf->pos < u->fbuf->act)
+    return (unsigned char) u->fbuf->buf[u->fbuf->pos++];
+  return fbuf_getc_refill (u);
+}
+
+#endif