vsprintf.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "synonyms.h"
#include <mtlib.h>
#include <stdarg.h>
#include <values.h>
#include <errno.h>
#include <synch.h>
#include <thread.h>
#include <sys/types.h>
#include "print.h"
#include "libc.h"
/*
* 32-bit shadow function of vsprintf() is included here.
* When using the c89 compiler to build 32-bit applications, the size
* of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
* The shadow function uses 32-bit size of intmax_t for %j conversion.
* The #pragma redefine_extname in <stdio.h> selects the proper routine
* at compile time for the user application.
* NOTE: this function is only available in the 32-bit library.
*/
/*VARARGS2*/
int
#ifdef _C89_INTMAX32
_vsprintf_c89(char *string, const char *format, va_list ap)
#else
vsprintf(char *string, const char *format, va_list ap)
#endif
{
ssize_t count;
FILE siop;
siop._cnt = MAXINT;
siop._base = siop._ptr = (unsigned char *)string;
siop._flag = _IOREAD; /* distinguish dummy file descriptor */
#ifdef _C89_INTMAX32
count = _ndoprnt(format, ap, &siop, _F_INTMAX32);
#else
count = _ndoprnt(format, ap, &siop, 0);
#endif
*siop._ptr = '\0'; /* plant terminating null character */
if (count == EOF) {
return (EOF);
}
/* check for overflow */
if ((size_t)count > MAXINT) {
errno = EOVERFLOW;
return (EOF);
} else {
return ((int)count);
}
}