/*      $NetBSD: gets.c,v 1.2 2009/07/20 04:59:03 kiyohara 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. 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 "lib/libsa/stand.h"
#include "lib/libsa/loadfile.h"

#include "bootstrap.h"

/* gets() with constrained input length */

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

   for (lp = buf;;)
       switch (c = getchar() & 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)) {
               *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);
}