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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include "lint.h"
33#include <mtlib.h>
34#include <stdarg.h>
35#include <values.h>
36#include <errno.h>
37#include <synch.h>
38#include <thread.h>
39#include <sys/types.h>
40#include "print.h"
41#include "libc.h"
42
43/*
44 * 32-bit shadow function of vsprintf() is included here.
45 * When using the c89 compiler to build 32-bit applications, the size
46 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
47 * The shadow function uses 32-bit size of intmax_t for %j conversion.
48 * The #pragma redefine_extname in <stdio.h> selects the proper routine
49 * at compile time for the user application.
50 * NOTE: this function is only available in the 32-bit library.
51 */
52
53/*VARARGS2*/
54int
55#ifdef _C89_INTMAX32
56_vsprintf_c89(char *string, const char *format, va_list ap)
57#else
58vsprintf(char *string, const char *format, va_list ap)
59#endif
60{
61	ssize_t count;
62	FILE siop;
63
64	siop._cnt = MAXINT;
65	siop._base = siop._ptr = (unsigned char *)string;
66	siop._flag = _IOREAD; /* distinguish dummy file descriptor */
67#ifdef _C89_INTMAX32
68	count = _ndoprnt(format, ap, &siop, _F_INTMAX32);
69#else
70	count = _ndoprnt(format, ap, &siop, 0);
71#endif
72	*siop._ptr = '\0'; /* plant terminating null character */
73
74	if (count == EOF) {
75		return (EOF);
76	}
77	/* check for overflow */
78	if ((size_t)count > MAXINT) {
79		errno = EOVERFLOW;
80		return (EOF);
81	} else {
82		return ((int)count);
83	}
84}
85