1 files changed, 110 insertions, 0 deletions
diff --git a/mit-pthreads/stdio/fgets.c b/mit-pthreads/stdio/fgets.c
new file mode 100644
index 00000000000..5ee5c4d6608
--- /dev/null
+++ b/mit-pthreads/stdio/fgets.c
@@ -0,0 +1,110 @@
+/*-
+ * 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: @(#)fgets.c	5.4 (Berkeley) 5/4/91";*/
+static char *rcsid = "$Id$";
+#endif /* LIBC_SCCS and not lint */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Read at most n-1 characters from the given file.
+ * Stop when a newline has been read, or the count runs out.
+ * Return first argument, or NULL if no characters were read.
+ */
+char *
+fgets(buf, n, fp)
+	char *buf;
+	register size_t n;
+	register FILE *fp;
+{
+	register size_t len;
+	register char *s;
+	register unsigned char *p, *t;
+
+	if (n < 2)		/* sanity check */
+		return (NULL);
+
+	flockfile(fp);
+	s = buf;
+	n--;			/* leave space for NUL */
+	do {
+		/*
+		 * If the buffer is empty, refill it.
+		 */
+		if ((len = fp->_r) <= 0) {
+			if (__srefill(fp)) {
+				/* EOF/error: stop with partial or no line */
+				if (s == buf)
+					buf = NULL;
+				break;
+			}
+			len = fp->_r;
+		}
+		p = fp->_p;
+
+		/*
+		 * Scan through at most n bytes of the current buffer,
+		 * looking for '\n'.  If found, copy up to and including
+		 * newline, and stop.  Otherwise, copy entire chunk
+		 * and loop.
+		 */
+		if (len > n)
+			len = n;
+		t = memchr((void *)p, '\n', len);
+		if (t != NULL) {
+			len = ++t - p;
+			fp->_r -= len;
+			fp->_p = t;
+			(void) memcpy((void *)s, (void *)p, len);
+			s += len;
+			break;
+		}
+		fp->_r -= len;
+		fp->_p += len;
+		(void) memcpy((void *)s, (void *)p, len);
+		s += len;
+	} while ((n -= len) != 0);
+
+	*s = 0;
+	funlockfile(fp);
+	return (buf);
+}