1 files changed, 77 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/stdio/common/fread.c b/usr/src/lib/libbc/libc/stdio/common/fread.c
new file mode 100644
index 0000000000..c195690c5f
--- /dev/null
+++ b/usr/src/lib/libbc/libc/stdio/common/fread.c
@@ -0,0 +1,77 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1986 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*      Copyright (c) 1984 AT&T */
+/*        All Rights Reserved   */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R2 3.11 */
+
+/*LINTLIBRARY*/
+/*
+ * This version reads directly from the buffer rather than looping on getc.
+ * Ptr args aren't checked for NULL because the program would be a
+ * catastrophic mess anyway.  Better to abort than just to return NULL.
+ */
+#include <stdio.h>
+#include "stdiom.h"
+
+#define MIN(x, y)	(x < y ? x : y)
+
+extern int _filbuf();
+extern _bufsync();
+extern char *memcpy();
+
+int
+fread(ptr, size, count, iop)
+char *ptr;
+int size, count;
+register FILE *iop;
+{
+	register unsigned int nleft;
+	register int n;
+
+	if (size <= 0 || count <= 0) return 0;
+	nleft = count * size;
+
+	/* Put characters in the buffer */
+	/* note that the meaning of n when just starting this loop is
+	   irrelevant.  It is defined in the loop */
+	for ( ; ; ) {
+		if (iop->_cnt <= 0) { /* empty buffer */
+			if (_filbuf(iop) == EOF)
+				return (count - (nleft + size - 1)/size);
+			iop->_ptr--;
+			iop->_cnt++;
+		}
+		n = MIN(nleft, iop->_cnt);
+		ptr = memcpy(ptr, (char *) iop->_ptr, n) + n;
+		iop->_cnt -= n;
+		iop->_ptr += n;
+		_BUFSYNC(iop);
+		if ((nleft -= n) == 0)
+			return (count);
+	}
+}