gets.c

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    1 /*-
    2  * Copyright (c) 1999 Michael Smith
    3  * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/cons.h>
   33 #include <sys/libkern.h>
   34 
   35 void
   36 gets(char *cp, size_t size, int visible)
   37 {
   38         char *lp, *end;
   39         int c;
   40 
   41         lp = cp;
   42         end = cp + size - 1;
   43         for (;;) {
   44                 c = cngetc() & 0177;
   45                 switch (c) {
   46                 case '\n':
   47                 case '\r':
   48                         printf("%c", c);
   49                         *lp = '\0';
   50                         return;
   51                 case '\b':
   52                 case '\177':
   53                         if (lp > cp) {
   54                                 if (visible)
   55                                         printf("%c \b", c);
   56                                 lp--;
   57                         }
   58                         continue;
   59                 case '\0':
   60                         continue;
   61                 default:
   62                         if (lp < end) {
   63                                 if (visible)
   64                                         printf("%c", c);
   65                                 *lp++ = c;
   66                         }
   67                 }
   68         }
   69 }

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FreeBSD/Linux Kernel Cross Reference sys/libkern/gets.c

FreeBSD/Linux Kernel Cross Reference
sys/libkern/gets.c