/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

#include "lint.h"
#include "file64.h"
#include "mtlib.h"
#include <sys/types.h>
#include <stdio.h>
#include <memory.h>
#include <thread.h>
#include <synch.h>
#include <limits.h>
#include "stdiom.h"
#include "mse.h"

int
puts(const char *ptr)
{
        ssize_t ndone = 0L, n;
        unsigned char *cptr, *bufend;
        rmutex_t *lk;
        size_t  ptrlen;
        size_t  len = 0;
        int     c;

        FLOCKFILE(lk, stdout);

        _SET_ORIENTATION_BYTE(stdout);

        if (_WRTCHK(stdout)) {
                FUNLOCKFILE(lk);
                return (EOF);
        }

        bufend = _bufend(stdout);

        ptrlen = strlen(ptr) + 1;       /* adding 1 for '\n' */
        for (; ; ptr += len, ptrlen -= len) {
                while ((n = bufend - (cptr = stdout->_ptr)) <= 0) /* full buf */
                {
                        if (_xflsbuf(stdout) == EOF) {
                                FUNLOCKFILE(lk);
                                return (EOF);
                        }
                }
                /*
                 * n: number of available bytes in the buffer of stdout
                 * ptrlen: number of remaining bytes in 'ptr' string
                 *
                 * If all remaining bytes in 'ptr' can be copied into
                 * the buffer of stdout (ptrlen <= n), 'len' is set to
                 * 'ptrlen'.  Otherwise, 'len' is set to 'n'.
                 * Then, copies 'len' bytes from 'ptr' to the buffer
                 * of stdout.
                 */
                len = (c = (ptrlen <= n)) ? ptrlen : n;
                (void) memcpy(cptr, ptr, len);
                stdout->_cnt -= len;
                stdout->_ptr += len;
                if (_needsync(stdout, bufend))
                        _bufsync(stdout, bufend);
                ndone += len;
                if (c) {
                        /*
                         * All bytes in 'ptr' can be copied into
                         * the buffer of stdout.
                         * Terminate the buffer of stdout with '\n'
                         * and flush line buffer
                         */
                        stdout->_ptr[-1] = '\n';
                        if (stdout->_flag & (_IONBF | _IOLBF)) {
                                /* flush line */
                                if (_xflsbuf(stdout) == EOF) {
                                        FUNLOCKFILE(lk);
                                        return (EOF);
                                }
                        }
                        FUNLOCKFILE(lk);
                        if (ndone <= INT_MAX)
                                return ((int)ndone);
                        else
                                return (EOF);
                }
        }
}