lib/msgs/_putmessage.c

/*
 * 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#ident  "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.10  */
/* LINTLIBRARY */

# include   <stdarg.h>
# include   <string.h>
# include   <errno.h>

# include   "msgs.h"

extern char *_lp_msg_fmts[];
extern int  errno;

/* VARARGS */
#if defined(__STDC__)
int _putmessage ( char * buf, short type, va_list arg )
#else
int _putmessage (buf, type, arg)
    char    *buf;
    short   type;
    va_list arg;
#endif
{
    char    *fmt;
    char    *t_string;
    int     size = 0;
    long    t_long;
    short   t_short;

    if (type < 0 || type > LAST_MESSAGE)
    {
    errno = EBADMSG;
    return(-1);
    }

    if (buf)
    (void) htos(buf + MESG_TYPE, type);

    size = MESG_LEN;

    fmt = _lp_msg_fmts[type];

    while (*fmt != '\0')
    switch(*fmt++)
    {
        case 'H':
        t_short = (short) va_arg(arg, int);
        if (buf)
             (void) htos(buf + size, t_short);

        size += 4;
        break;

        case 'L':
        t_long = (long) va_arg(arg, int);
        if (buf)
             (void) ltos(buf + size, t_long);

        size += 8;
        break;

        case 'S':
        t_string = (char *) va_arg(arg, char *);
        t_short = (t_string? strlen(t_string) : 0) + 1;

        if (buf)
            (void) htos(buf + size, t_short);

        size += 4;

        if (buf)
            if (t_string)
                (void) memcpy(buf + size, t_string, t_short);
            else
                (buf + size)[0] = 0;

        size += t_short;
        break;

        case 'D':
        t_short = (short) va_arg(arg, int) + 1;
        t_string = (char *) va_arg(arg, char *);

        if (buf)
            (void) htos(buf + size, t_short);

        size += 4;

        if (buf)
            if (t_string)
            {
            (void) memcpy(buf + size, t_string, t_short);
            buf[size + t_short - 1] = '\0';
            }
            else
            *(buf + size) = '\0';

        size += t_short;
        break;
    }


    if (buf)
    *(buf + size) = '\0';

    size++;     /* Add a null, just on general principle */

    if (buf)
    (void) htos(buf + MESG_SIZE, size);

    return(size);
}