1 files changed, 90 insertions, 0 deletions
diff --git a/mit-pthreads/stdio/ftell.c b/mit-pthreads/stdio/ftell.c
new file mode 100644
index 00000000000..e5961fa50b6
--- /dev/null
+++ b/mit-pthreads/stdio/ftell.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * Copyright (c) 1993, 1994 Chris Provenzano. 
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+/*static char *sccsid = "from: @(#)ftell.c	5.4 (Berkeley) 2/5/91";*/
+static char *rcsid = "$Id$";
+#endif /* LIBC_SCCS and not lint */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <errno.h>
+#include "local.h"
+
+/*
+ * ftell: return current offset.
+ */
+long
+ftell(fp)
+	register const FILE *fp;
+{
+	long pos;
+
+	flockfile((FILE *)fp);
+
+	/*
+	 * Find offset of underlying I/O object, then
+	 * adjust for buffered bytes.
+	 */
+	if (fp->_flags & __SOFF) {
+		pos = fp->_offset;
+	} else {
+		pos = (long)__sseek((FILE *)fp, (off_t)0, SEEK_CUR);
+	}
+
+	if (pos != -1L) {
+		if (fp->_flags & __SRD) {
+			/*
+			 * Reading.  Any unread characters (including
+			 * those from ungetc) cause the position to be
+			 * smaller than that in the underlying object.
+			 */
+			pos -= fp->_r;
+			if (HASUB(fp))
+				pos -= fp->_ur;
+		} else if (fp->_flags & __SWR && fp->_p != NULL) {
+			/*
+			 * Writing.  Any buffered characters cause the
+			 * position to be greater than that in the
+			 * underlying object.
+			 */
+			pos += fp->_p - fp->_bf._base;
+		}
+	}
+	funlockfile((FILE *)fp);
+	return (pos);
+}