port/print/vwprintf.c

/*
 * 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 (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
 */


#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"

/*
 * 32-bit shadow functions _vwprintf_c89(), _vfwprintf_c89(),
 * _vswprintf_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
#ifdef _C89_INTMAX32        /* _C89_INTMAX32 version in 32-bit libc only */
_vwprintf_c89(const wchar_t *format, va_list ap)
#else
vwprintf(const wchar_t *format, va_list ap)
#endif
{
    ssize_t count;
    rmutex_t    *lk;

    FLOCKFILE(lk, stdout);

    if (_set_orientation_wide(stdout, NULL, NULL, 0) == -1) {
        errno = EBADF;
        FUNLOCKFILE(lk);
        return (EOF);
    }
    if (!(stdout->_flag & _IOWRT)) {
        /* if no write flag */
        if (stdout->_flag & _IORW) {
            /* if ok, cause read-write */
            _READ2WRT(stdout);
        } else {
            /* else error */
            errno = EBADF;
            FUNLOCKFILE(lk);
            return (EOF);
        }
    }
#ifdef _C89_INTMAX32
    count = _wndoprnt(format, ap, stdout, _F_INTMAX32);
#else
    count = _wndoprnt(format, ap, stdout, 0);
#endif  /* _C89_INTMAX32 */

    if (FERROR(stdout) || count == EOF) {
        FUNLOCKFILE(lk);
        return (EOF);
    }
    FUNLOCKFILE(lk);
    /* check for overflow */
    if ((size_t)count > MAXINT) {
        errno = EOVERFLOW;
        return (EOF);
    } else {
        return ((int)count);
    }
}

int
#ifdef _C89_INTMAX32        /* _C89_INTMAX32 version in 32-bit libc only */
_vfwprintf_c89(FILE *iop, const wchar_t *format, va_list ap)
#else
vfwprintf(FILE *iop, const wchar_t *format, va_list ap)
#endif
{
    ssize_t count;
    rmutex_t    *lk;

    FLOCKFILE(lk, iop);

    if (_set_orientation_wide(iop, NULL, NULL, 0) == -1) {
        errno = EBADF;
        FUNLOCKFILE(lk);
        return (EOF);
    }

    if (!(iop->_flag & _IOWRT)) {
        /* if no write flag */
        if (iop->_flag & _IORW) {
            /* if ok, cause read-write */
            _READ2WRT(iop);
        } else {
            /* else error */
            errno = EBADF;
            FUNLOCKFILE(lk);
            return (EOF);
        }
    }
#ifdef _C89_INTMAX32
    count = _wndoprnt(format, ap, iop, _F_INTMAX32);
#else
    count = _wndoprnt(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);
    } else {
        return ((int)count);
    }
}

int
#ifdef _C89_INTMAX32        /* _C89_INTMAX32 version in 32-bit libc only */
_vswprintf_c89(wchar_t *string, size_t n, const wchar_t *format, va_list ap)
#else
vswprintf(wchar_t *string, size_t n, const wchar_t *format, va_list ap)
#endif
{
    ssize_t count;
    FILE    siop;
    wchar_t *wp;

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

    siop._cnt = (ssize_t)n - 1;
    siop._base = siop._ptr = (unsigned char *)string;
    siop._flag = _IOREAD;

#ifdef _C89_INTMAX32
    count = _wndoprnt(format, ap, &siop, _F_INTMAX32);
#else
    count = _wndoprnt(format, ap, &siop, 0);
#endif
    wp = (wchar_t *)(uintptr_t)siop._ptr;
    *wp = L'\0';
    if (count == EOF) {
        return (EOF);
    }
    /* check for overflow */
    if ((size_t)count > MAXINT) {
        errno = EOVERFLOW;
        return (EOF);
    } else {
        return ((int)count);
    }
}