usr/src/lib/libbc/libc/stdio/common/puts.c

   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 }