/*
 * 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 2025 Hans Rosenfeld
 * 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 <thread.h>
#include <mtlib.h>
#include <synch.h>
#include <stdarg.h>
#include <values.h>
#include <errno.h>
#include <sys/types.h>
#include "print.h"
#include "libc.h"
#include "mse.h"

#ifdef _C89_INTMAX32
/*
 * 32-bit shadow functions of vfprintf(), fprintf(), vprintf(), and printf()
 * are built 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: these functions are only available in the 32-bit library.
 */
#pragma redefine_extname vfprintf _vfprintf_c89
#pragma redefine_extname fprintf _fprintf_c89
#pragma redefine_extname vprintf _vprintf_c89
#pragma redefine_extname printf _printf_c89
#else
/*
 * This symbol should not be defined, but there are some
 * miserable old compiler libraries that depend on it.
 */
#pragma weak _fprintf = fprintf
#endif

int
vfprintf(FILE *iop, const char *format, va_list ap)
{
        ssize_t count;
        rmutex_t *lk;

        /* Use F*LOCKFILE() macros because vfprintf() is not async-safe. */
        FLOCKFILE(lk, iop);

        _SET_ORIENTATION_BYTE(iop);

        if (!(iop->_flag & _IOWRT)) {
                /* if no write flag */
                if (iop->_flag & _IORW) {
                        /* if ok, cause read-write */
                        iop->_flag |= _IOWRT;
                } else {
                        /* else error */
                        FUNLOCKFILE(lk);
                        errno = EBADF;
                        return (EOF);
                }
        }
#ifdef _C89_INTMAX32
        count = _ndoprnt(format, ap, iop, _F_INTMAX32);
#else
        count = _ndoprnt(format, ap, iop, 0);
#endif

        /* check for error or EOF */
        if (FERROR(iop) || count == EOF) {
                FUNLOCKFILE(lk);
                return (EOF);
        }

        FUNLOCKFILE(lk);

        /* check for overflow */
        if ((size_t)count > MAXINT) {
                errno = EOVERFLOW;
                return (EOF);
        }

        return ((int)count);
}

int
fprintf(FILE *iop, const char *format, ...)
{
        int count;
        va_list ap;

        va_start(ap, format);
        count = vfprintf(iop, format, ap);
        va_end(ap);

        return (count);
}

int
vprintf(const char *format, va_list ap)
{
        int count;

        count = vfprintf(stdout, format, ap);

        return (count);
}

int
printf(const char *format, ...)
{
        int count;
        va_list ap;

        va_start(ap, format);
        count = vfprintf(stdout, format, ap);
        va_end(ap);

        return (count);
}