Use CSTD and remove local CSTD settings which are no longer needed.
[dragonfly.git] / lib / libstand / gets.c
CommitLineData
984263bc 1/* $NetBSD: gets.c,v 1.6 1995/10/11 21:16:57 pk Exp $ */
660c873b 2/* $DragonFly: src/lib/libstand/gets.c,v 1.2 2004/10/25 19:38:45 drhodus Exp $ */
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3
4/*-
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)gets.c 8.1 (Berkeley) 6/11/93
37 */
38
39#include "stand.h"
40
41/* gets() with constrained input length */
42
43void
44ngets(char *buf, int n)
45{
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46 int c;
47 char *lp;
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48
49 for (lp = buf;;)
50 switch (c = getchar() & 0177) {
51 case '\n':
52 case '\r':
53 *lp = '\0';
54 putchar('\n');
55 return;
56 case '\b':
57 case '\177':
58 if (lp > buf) {
59 lp--;
60 putchar('\b');
61 putchar(' ');
62 putchar('\b');
63 }
64 break;
65 case 'r'&037: {
660c873b 66 char *p;
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67
68 putchar('\n');
69 for (p = buf; p < lp; ++p)
70 putchar(*p);
71 break;
72 }
73 case 'u'&037:
74 case 'w'&037:
75 lp = buf;
76 putchar('\n');
77 break;
78 default:
79 if ((n < 1) || ((lp - buf) < n)) {
80 *lp++ = c;
81 putchar(c);
82 }
83 }
84 /*NOTREACHED*/
85}
86
87int
88fgetstr(char *buf, int size, int fd)
89{
90 char c;
91 int err, len;
368f90fe 92
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93 size--; /* leave space for terminator */
94 len = 0;
95 while (size != 0) {
96 err = read(fd, &c, sizeof(c));
97 if (err < 0) /* read error */
98 return(-1);
99 if (err == 0) { /* EOF */
100 if (len == 0)
101 return(-1); /* nothing to read */
102 break;
103 }
104 if ((c == '\r') || /* line terminators */
105 (c == '\n'))
106 break;
107 *buf++ = c; /* keep char */
108 size--;
109 len++;
110 }
111 *buf = 0;
112 return(len);
113}
114
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115char *
116fgets(char *buf, int size, int fd)
117{
118 char c, *p;
119 int err, len;
120
121 p = buf;
122 size--; /* leave space for terminator */
123 len = 0;
124 while (size != 0) {
125 err = read(fd, &c, sizeof(c));
126 if (err < 0) /* read error */
127 return(NULL);
128 if (err == 0) { /* EOF */
129 if (len == 0)
130 return(NULL); /* nothing to read */
131 break;
132 }
133 *p++ = c; /* keep char */
134 size--;
135 len++;
136 if ((c == '\r') || /* line terminators */
137 (c == '\n'))
138 break;
139 }
140 *p = 0;
141 return(buf);
142}