diff options
Diffstat (limited to 'newlib/libc/sys/rdos/lseek.c')
| -rwxr-xr-x | newlib/libc/sys/rdos/lseek.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/newlib/libc/sys/rdos/lseek.c b/newlib/libc/sys/rdos/lseek.c new file mode 100755 index 000000000..b1cdb2178 --- /dev/null +++ b/newlib/libc/sys/rdos/lseek.c @@ -0,0 +1,59 @@ +/*#######################################################################
+# RDOS operating system
+# Copyright (C) 1988-2006, Leif Ekblad
+#
+# This library is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation; either version 2.1 of the License, 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# The author of this program may be contacted at leif@rdos.net
+#
+# lseek.c
+# lseek function implementation
+#
+##########################################################################*/
+
+#include "config.h"
+#include <_ansi.h>
+#include <_syslist.h>
+#include <unistd.h>
+#include <errno.h>
+#include <rdos.h>
+
+off_t lseek(int file, off_t pos, int whence)
+{
+ off_t temp;
+
+ switch (whence)
+ {
+ case SEEK_CUR:
+ temp = RdosGetFilePos(file);
+ temp += pos;
+ RdosSetFilePos(file, temp);
+ return temp;
+
+ case SEEK_SET:
+ RdosSetFilePos(file, pos);
+ return pos;
+
+ case SEEK_END:
+ temp = RdosGetFilePos(file);
+ temp += pos;
+ RdosSetFilePos(file, temp);
+ return temp;
+
+ default:
+ errno = EINVAL;
+ return - 1;
+ }
+}
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