import newlib-2000-02-17 snapshot

1 files changed, 92 insertions, 0 deletions

diff --git a/newlib/libc/stdio/stdio.c b/newlib/libc/stdio/stdio.c
new file mode 100644
index 000000000..c06f51aa0
--- /dev/null
+++ b/newlib/libc/stdio/stdio.c
@@ -0,0 +1,92 @@
+/* No user fns here.  Pesch 15apr92. */
+
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/unistd.h>
+#include "local.h"
+
+/*
+ * Small standard I/O/seek/close functions.
+ * These maintain the `known seek offset' for seek optimisation.
+ */
+
+int
+__sread (cookie, buf, n)
+     _PTR cookie;
+     char *buf;
+     int n;
+{
+  register FILE *fp = (FILE *) cookie;
+  register int ret;
+
+  ret = _read_r (fp->_data, fp->_file, buf, n);
+
+  /* If the read succeeded, update the current offset.  */
+
+  if (ret >= 0)
+    fp->_offset += ret;
+  else
+    fp->_flags &= ~__SOFF;	/* paranoia */
+  return ret;
+}
+
+int
+__swrite (cookie, buf, n)
+     _PTR cookie;
+     char _CONST *buf;
+     int n;
+{
+  register FILE *fp = (FILE *) cookie;
+
+  if (fp->_flags & __SAPP)
+    (void) _lseek_r (fp->_data, fp->_file, (off_t) 0, SEEK_END);
+  fp->_flags &= ~__SOFF;	/* in case O_APPEND mode is set */
+  return _write_r (fp->_data, fp->_file, buf, n);
+}
+
+fpos_t
+__sseek (cookie, offset, whence)
+     _PTR cookie;
+     fpos_t offset;
+     int whence;
+{
+  register FILE *fp = (FILE *) cookie;
+  register off_t ret;
+
+  ret = _lseek_r (fp->_data, fp->_file, (off_t) offset, whence);
+  if (ret == -1L)
+    fp->_flags &= ~__SOFF;
+  else
+    {
+      fp->_flags |= __SOFF;
+      fp->_offset = ret;
+    }
+  return ret;
+}
+
+int
+__sclose (cookie)
+     _PTR cookie;
+{
+  FILE *fp = (FILE *) cookie;
+
+  return _close_r (fp->_data, fp->_file);
+}