1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1989 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 3.6 */
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate /*LINTLIBRARY*/
33*0Sstevel@tonic-gate /*
34*0Sstevel@tonic-gate * This version writes directly to the buffer rather than looping on putc.
35*0Sstevel@tonic-gate * Ptr args aren't checked for NULL because the program would be a
36*0Sstevel@tonic-gate * catastrophic mess anyway. Better to abort than just to return NULL.
37*0Sstevel@tonic-gate *
38*0Sstevel@tonic-gate * This version does buffered writes larger than BUFSIZ directly, when
39*0Sstevel@tonic-gate * the buffer is empty.
40*0Sstevel@tonic-gate */
41*0Sstevel@tonic-gate #include <stdio.h>
42*0Sstevel@tonic-gate #include "stdiom.h"
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate #define MIN(x, y) (x < y ? x : y)
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate extern char *memcpy();
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate int
fwrite(ptr,size,count,iop)49*0Sstevel@tonic-gate fwrite(ptr, size, count, iop)
50*0Sstevel@tonic-gate char *ptr;
51*0Sstevel@tonic-gate int size, count;
52*0Sstevel@tonic-gate register FILE *iop;
53*0Sstevel@tonic-gate {
54*0Sstevel@tonic-gate register unsigned nleft;
55*0Sstevel@tonic-gate register int n;
56*0Sstevel@tonic-gate register unsigned char *cptr, *bufend;
57*0Sstevel@tonic-gate register unsigned char *prev_ptr;
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate if (size <= 0 || count <= 0 || _WRTCHK(iop))
60*0Sstevel@tonic-gate return (0);
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate bufend = iop->_base + iop->_bufsiz;
63*0Sstevel@tonic-gate nleft = count*size;
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate /* if the file is unbuffered, or if the iop->ptr = iop->base, and there
66*0Sstevel@tonic-gate is > BUFSZ chars to write, we can do a direct write */
67*0Sstevel@tonic-gate prev_ptr = iop->_ptr;
68*0Sstevel@tonic-gate if (iop->_base >= iop->_ptr) { /*this covers the unbuffered case, too*/
69*0Sstevel@tonic-gate if (((iop->_flag & _IONBF) != 0) || (nleft >= BUFSIZ)) {
70*0Sstevel@tonic-gate if ((n=write(fileno(iop),ptr,nleft)) != nleft)
71*0Sstevel@tonic-gate {
72*0Sstevel@tonic-gate iop->_flag |= _IOERR;
73*0Sstevel@tonic-gate n = (n >= 0) ? n : 0;
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate return n/size;
76*0Sstevel@tonic-gate }
77*0Sstevel@tonic-gate }
78*0Sstevel@tonic-gate /* Put characters in the buffer */
79*0Sstevel@tonic-gate /* note that the meaning of n when just starting this loop is
80*0Sstevel@tonic-gate irrelevant. It is defined in the loop */
81*0Sstevel@tonic-gate for (; ; ptr += n) {
82*0Sstevel@tonic-gate while ((n = bufend - (cptr = iop->_ptr)) <= 0) /* full buf */
83*0Sstevel@tonic-gate if (_xflsbuf(iop) == EOF)
84*0Sstevel@tonic-gate return (count - (nleft + size - 1)/size);
85*0Sstevel@tonic-gate n = MIN(nleft, n);
86*0Sstevel@tonic-gate (void) memcpy((char *) cptr, ptr, n);
87*0Sstevel@tonic-gate iop->_cnt -= n;
88*0Sstevel@tonic-gate iop->_ptr += n;
89*0Sstevel@tonic-gate _BUFSYNC(iop);
90*0Sstevel@tonic-gate /* done; flush if linebuffered with a newline */
91*0Sstevel@tonic-gate if ((nleft -= n) == 0) {
92*0Sstevel@tonic-gate if (iop->_flag & (_IOLBF | _IONBF)) {
93*0Sstevel@tonic-gate if ((iop->_flag & _IONBF) || (memchr(prev_ptr,
94*0Sstevel@tonic-gate '\n',iop->_ptr - prev_ptr) != NULL)) {
95*0Sstevel@tonic-gate (void) _xflsbuf(iop);
96*0Sstevel@tonic-gate }
97*0Sstevel@tonic-gate }
98*0Sstevel@tonic-gate return (count);
99*0Sstevel@tonic-gate }
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate }
102