xref: /illumos-gate/usr/src/lib/libc/port/print/vsprintf.c (revision 1da57d55)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
21*7257d1b4Sraf 
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
287c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
297c478bd9Sstevel@tonic-gate 
30*7257d1b4Sraf #include "lint.h"
317c478bd9Sstevel@tonic-gate #include <mtlib.h>
327c478bd9Sstevel@tonic-gate #include <stdarg.h>
337c478bd9Sstevel@tonic-gate #include <values.h>
347c478bd9Sstevel@tonic-gate #include <errno.h>
357c478bd9Sstevel@tonic-gate #include <synch.h>
367c478bd9Sstevel@tonic-gate #include <thread.h>
377c478bd9Sstevel@tonic-gate #include <sys/types.h>
387c478bd9Sstevel@tonic-gate #include "print.h"
397c478bd9Sstevel@tonic-gate #include "libc.h"
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate /*
427c478bd9Sstevel@tonic-gate  * 32-bit shadow function of vsprintf() is included here.
437c478bd9Sstevel@tonic-gate  * When using the c89 compiler to build 32-bit applications, the size
447c478bd9Sstevel@tonic-gate  * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
457c478bd9Sstevel@tonic-gate  * The shadow function uses 32-bit size of intmax_t for %j conversion.
467c478bd9Sstevel@tonic-gate  * The #pragma redefine_extname in <stdio.h> selects the proper routine
477c478bd9Sstevel@tonic-gate  * at compile time for the user application.
487c478bd9Sstevel@tonic-gate  * NOTE: this function is only available in the 32-bit library.
497c478bd9Sstevel@tonic-gate  */
507c478bd9Sstevel@tonic-gate 
517c478bd9Sstevel@tonic-gate /*VARARGS2*/
527c478bd9Sstevel@tonic-gate int
537c478bd9Sstevel@tonic-gate #ifdef _C89_INTMAX32
_vsprintf_c89(char * string,const char * format,va_list ap)547c478bd9Sstevel@tonic-gate _vsprintf_c89(char *string, const char *format, va_list ap)
557c478bd9Sstevel@tonic-gate #else
567c478bd9Sstevel@tonic-gate vsprintf(char *string, const char *format, va_list ap)
577c478bd9Sstevel@tonic-gate #endif
587c478bd9Sstevel@tonic-gate {
597c478bd9Sstevel@tonic-gate 	ssize_t count;
607c478bd9Sstevel@tonic-gate 	FILE siop;
617c478bd9Sstevel@tonic-gate 
627c478bd9Sstevel@tonic-gate 	siop._cnt = MAXINT;
637c478bd9Sstevel@tonic-gate 	siop._base = siop._ptr = (unsigned char *)string;
647c478bd9Sstevel@tonic-gate 	siop._flag = _IOREAD; /* distinguish dummy file descriptor */
657c478bd9Sstevel@tonic-gate #ifdef _C89_INTMAX32
667c478bd9Sstevel@tonic-gate 	count = _ndoprnt(format, ap, &siop, _F_INTMAX32);
677c478bd9Sstevel@tonic-gate #else
687c478bd9Sstevel@tonic-gate 	count = _ndoprnt(format, ap, &siop, 0);
697c478bd9Sstevel@tonic-gate #endif
707c478bd9Sstevel@tonic-gate 	*siop._ptr = '\0'; /* plant terminating null character */
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate 	if (count == EOF) {
737c478bd9Sstevel@tonic-gate 		return (EOF);
747c478bd9Sstevel@tonic-gate 	}
757c478bd9Sstevel@tonic-gate 	/* check for overflow */
767c478bd9Sstevel@tonic-gate 	if ((size_t)count > MAXINT) {
777c478bd9Sstevel@tonic-gate 		errno = EOVERFLOW;
787c478bd9Sstevel@tonic-gate 		return (EOF);
797c478bd9Sstevel@tonic-gate 	} else {
807c478bd9Sstevel@tonic-gate 		return ((int)count);
817c478bd9Sstevel@tonic-gate 	}
827c478bd9Sstevel@tonic-gate }
83