117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* $NetBSD: gets.c,v 1.1.1.1 1997/03/13 16:27:28 gwr Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)gets.c 8.1 (Berkeley) 6/11/93
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*/
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#include "stand.h"
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/*
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* This implementation assumes that getchar() does echo, because
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* on some machines, it is hard to keep echo from being done.
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* Those that need it can do echo in their getchar() function.
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*
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* Yes, the code below will echo CR, DEL, and other control chars,
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* but sending CR or DEL here is harmless. All the other editing
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* characters will be followed by a newline, so it doesn't matter.
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* (Most terminals will not show them anyway.)
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*/
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void
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gets(buf)
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char *buf;
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{
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register int c;
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register char *lp;
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top:
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lp = buf;
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for (;;) {
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c = getchar() & 0177;
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#ifdef GETS_MUST_ECHO /* Preserved in case someone wants it... */
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putchar(c);
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#endif
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switch (c) {
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default:
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*lp++ = c;
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continue;
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case '\177':
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putchar('\b');
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/* fall through */
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case '\b':
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putchar(' ');
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putchar('\b');
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/* fall through */
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case '#':
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if (lp > buf)
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lp--;
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continue;
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#ifdef GETS_REPRINT
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/*
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* This is not very useful in a boot program.
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* (It costs you 52 bytes on m68k, gcc -O3).
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*/
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case 'r'&037: {
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register char *p;
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putchar('\n');
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for (p = buf; p < lp; ++p)
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putchar(*p);
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continue;
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}
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#endif
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case '@':
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case 'u'&037:
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case 'w'&037:
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putchar('\n');
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goto top;
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case '\r':
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putchar('\n');
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/* fall through */
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case '\n':
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*lp = '\0';
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return;
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} /* switch */
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}
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/*NOTREACHED*/
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}
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