de-errno
[dragonfly.git] / games / trek / utility.c
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1/*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)utility.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/trek/utility.c,v 1.5 1999/11/30 03:49:55 billf Exp $
a162d5fb 35 * $DragonFly: src/games/trek/utility.c,v 1.3 2005/04/29 09:22:57 joerg Exp $
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36 */
37
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38#include <errno.h>
39
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40/*
41** ASSORTED UTILITY ROUTINES
42*/
43
44/*
45** BLOCK MOVE
46**
47** Moves a block of storage of length `l' bytes from the data
48** area pointed to by `a' to the area pointed to by `b'.
49** Returns the address of the byte following the `b' field.
50** Overflow of `b' is not tested.
51*/
52
53char *bmove(a, b, l)
54char *a, *b;
55int l;
56{
57 int n;
58 char *p, *q;
59
60 p = a;
61 q = b;
62 n = l;
63 while (n--)
64 *q++ = *p++;
65 return (q);
66}
67
68
69/*
70** STRING EQUALITY TEST
71** null-terminated strings `a' and `b' are tested for
72** absolute equality.
73** returns one if equal, zero otherwise.
74*/
75
76sequal(a, b)
77char *a, *b;
78{
79 char *p, *q;
80
81 p = a;
82 q = b;
83 while (*p || *q)
84 if (*p++ != *q++)
85 return(0);
86 return(1);
87}
88
89
90/*
91** STRING CONCATENATE
92**
93** The strings `s1' and `s2' are concatenated and stored into
94** `s3'. It is ok for `s1' to equal `s3', but terrible things
95** will happen if `s2' equals `s3'. The return value is is a
96** pointer to the end of `s3' field.
97*/
98
99char *concat(s1, s2, s3)
100char *s1, *s2, *s3;
101{
102 char *p;
103 char *q;
104
105 p = s3;
106 q = s1;
107 while (*q)
108 *p++ = *q++;
109 q = s2;
110 while (*q)
111 *p++ = *q++;
112 *p = 0;
113 return (p);
114}
115
116
117/*
118** FIND STRING LENGTH
119**
120** The length of string `s' (excluding the null byte which
121** terminates the string) is returned.
122*/
123
124length(s)
125char *s;
126{
127 int l;
128 char *p;
129
130 l = 0;
131 p = s;
132 while (*p++)
133 l++;
134 return(l);
135}
136
137
138/*
139** SYSTEM ERROR
140*/
141
142syserr(p0, p1, p2, p3, p4, p5)
143{
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144 printf("\n\07TREK SYSERR: ");
145 printf(p0, p1, p2, p3, p4, p5);
146 printf("\n");
147 if (errno)
148 printf("\tsystem error %d\n", errno);
149 exit(1);
150}