/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*
 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*
 * Copyright 2025 Hans Rosenfeld
 */

#include "lint.h"
#include "file64.h"
#include <mtlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <thread.h>
#include <synch.h>
#include <values.h>
#include <wchar.h>
#include "print.h"
#include "stdiom.h"
#include <sys/types.h>
#include "libc.h"
#include "mse.h"
#include <stdio_ext.h>
#include <upanic.h>

#ifdef _C89_INTMAX32
#pragma redefine_extname vfwprintf _vfwprintf_c89
#pragma redefine_extname vswprintf _vswprintf_c89
#pragma redefine_extname vwprintf _vwprintf_c89
#pragma redefine_extname fwprintf _fwprintf_c89
#pragma redefine_extname swprintf _swprintf_c89
#pragma redefine_extname wprintf _wprintf_c89
#endif

/*
 * 32-bit shadow functions _vwprintf_c89(), _vfwprintf_c89(), _vswprintf_c89(),
 * _wprintf_c89(), _fwprintf_c89(), and _swprintf_c89() are 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 <wchar.h> selects the proper routine
 * at compile time for the user application.
 * NOTE: shadow functions only exist in the 32-bit library.
 */

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

        FLOCKFILE(lk, iop);

        if (GET_NO_MODE(iop))
                _setorientation(iop, _WC_MODE);

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

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

        return (count);
}

int
vwprintf(const wchar_t *format, va_list ap)
{
        int count;

        count = vfwprintf(stdout, format, ap);

        return (count);
}

int
wprintf(const wchar_t *format, ...)
{
        int count;
        va_list ap;

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

        return (count);
}

int
vswprintf(wchar_t *string, size_t n, const wchar_t *format, va_list ap)
{
        int     count;
        FILE    siop;
        wchar_t *wp;

        if (n == 0)
                return (EOF);

        /*
         * The dummy FILE * created for vswprintf has the _IOREAD
         * flag set to distinguish it from wprintf and wfprintf
         * invocations. It also has the _IOWRT flag set to indicate
         * it is writable, which is checked later by vfwprintf().
         */
        siop._flag = _IOWRT | _IOREAD;
        siop._cnt = (ssize_t)n - 1;
        siop._base = siop._ptr = (unsigned char *)string;

        /*
         * Mark the dummy FILE so that no locking is ever done.
         */
        if (__fsetlocking(&siop, FSETLOCKING_BYCALLER) == -1)
                upanic(NULL, 0);        /* this should never happen */

        count = vfwprintf(&siop, format, ap);

        wp = (wchar_t *)(uintptr_t)siop._ptr;
        *wp = L'\0';

        return (count);
}

int
swprintf(wchar_t *string, size_t n, const wchar_t *format, ...)
{
        int count;
        va_list ap;

        va_start(ap, format);
        count = vswprintf(string, n, format, ap);
        va_end(ap);

        return (count);
}