/*      $NetBSD: gets.c,v 1.6 1995/10/11 21:16:57 pk Exp $      */

/*
 * Copyright (c) 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)gets.c      8.1 (Berkeley) 6/11/93
 */

#include <sys/cdefs.h>

#include "stand.h"

/* gets() with constrained input length */

void
ngets(char *buf, int n)
{
        int c;
        char *lp;

        for (lp = buf; ; ) {
                c = getchar();
                if (c == -1)
                        break;
                switch (c & 0177) {
                case '\n':
                case '\r':
                        *lp = '\0';
                        putchar('\n');
                        return;
                case '\b':
                case '\177':
                        if (lp > buf) {
                                lp--;
                                putchar('\b');
                                putchar(' ');
                                putchar('\b');
                        }
                        break;
                case 'r' & 037: {
                        char *p;

                        putchar('\n');
                        for (p = buf; p < lp; ++p)
                                putchar(*p);
                        break;
                }
                case 'u' & 037:
                case 'w' & 037:
                        lp = buf;
                        putchar('\n');
                        break;
                default:
                        if ((n < 1) || ((lp - buf) < n - 1)) {
                                *lp++ = c;
                                putchar(c);
                        }
                }
        }
        /*NOTREACHED*/
}

int
fgetstr(char *buf, int size, int fd)
{
        char    c;
        int     err, len;

        size--; /* leave space for terminator */
        len = 0;
        while (size != 0) {
                err = read(fd, &c, sizeof (c));
                if (err < 0)            /* read error */
                        return (-1);
                if (err == 0) {         /* EOF */
                        if (len == 0)
                                return (-1);    /* nothing to read */
                        break;
                }
                if ((c == '\r') ||      /* line terminators */
                    (c == '\n'))
                        break;
                *buf++ = c;             /* keep char */
                size--;
                len++;
        }
        *buf = 0;
        return (len);
}