xref: /titanic_41/usr/src/lib/libbc/libc/stdio/common/puts.c (revision 5e2c3ae0c70f6eb4a42ae670882aabac983cb5f1)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1986 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*      Copyright (c) 1984 AT&T */
28 /*        All Rights Reserved   */
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R2 3.3 */
31 
32 /*LINTLIBRARY*/
33 /*
34  * This version writes directly to the buffer rather than looping on putc.
35  * Ptr args aren't checked for NULL because the program would be a
36  * catastrophic mess anyway.  Better to abort than just to return NULL.
37  */
38 #include <stdio.h>
39 #include "stdiom.h"
40 
41 extern char *memccpy();
42 
43 int
44 puts(ptr)
45 char *ptr;
46 {
47 	char *p;
48 	register int ndone = 0, n;
49 	register unsigned char *cptr, *bufend;
50 
51 	if (_WRTCHK(stdout))
52 		return (EOF);
53 
54 	bufend = stdout->_base + stdout->_bufsiz;
55 
56 	for ( ; ; ptr += n) {
57 		while ((n = bufend - (cptr = stdout->_ptr)) <= 0) /* full buf */
58 			if (_xflsbuf(stdout) == EOF)
59 				return(EOF);
60 		if ((p = memccpy((char *) cptr, ptr, '\0', n)) != NULL)
61 			n = p - (char *) cptr;
62 		stdout->_cnt -= n;
63 		stdout->_ptr += n;
64 		_BUFSYNC(stdout);
65 		ndone += n;
66 		if (p != NULL) {
67 			stdout->_ptr[-1] = '\n'; /* overwrite '\0' with '\n' */
68 			if (stdout->_flag & (_IONBF | _IOLBF)) /* flush line */
69 				if (_xflsbuf(stdout) == EOF)
70 					return(EOF);
71 			return(ndone);
72 		}
73 	}
74 }
75