usr/src/usr.bin/f77/libU77/putc_.c

/*-
 * Copyright (c) 1980 The Regents of the University of California.
 * All rights reserved.
 *
 * This module is believed to contain source code proprietary to AT&T.
 * Use and redistribution is subject to the Berkeley Software License
 * Agreement and your Software Agreement with AT&T (Western Electric).
 */

#ifndef lint
static char sccsid[] = "@(#)putc_.c     5.2 (Berkeley) 4/12/91";
#endif /* not lint */

/*
 * write a character to the standard output
 *
 * calling sequence:
 *      integer putc
 *      ierror =  putc (char)
 * where:
 *      char will be sent to the standard output, usually the terminal
 *      ierror will be 0 if successful; a system error code otherwise.
 */

#include        "../libI77/f_errno.h"
#include        "../libI77/fiodefs.h"

extern unit units[];    /* logical units table from iolib */

long putc_(c, clen)
char *c; long clen;
{
        int     i;
        unit    *lu;

        lu = &units[STDOUT];
        if (!lu->ufd)
                return((long)(errno=F_ERNOPEN));
        if (!lu->uwrt && ! nowwriting(lu))
                return((long)errno);
        putc (*c, lu->ufd);
        if (ferror(lu->ufd))
        {
                i = errno;
                clearerr(lu->ufd);
                return((long)i);
        }
        return(0L);
}