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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1991 Regents of the University of California. | |
3 | * 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. | |
32 | * | |
600f7f07 | 33 | * from: @(#)subr_xxx.c 7.10 (Berkeley) 4/20/91 |
4c45483e | 34 | * $Id: subr_xxx.c,v 1.2 1993/10/16 15:24:45 rgrimes Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
37 | /* | |
38 | * Miscellaneous trivial functions, including many | |
39 | * that are often inline-expanded or done in assembler. | |
40 | */ | |
41 | #include "param.h" | |
42 | #include "systm.h" | |
43 | #include "machine/cpu.h" | |
44 | ||
45 | /* | |
46 | * Unsupported device function (e.g. writing to read-only device). | |
47 | */ | |
4c45483e | 48 | int |
15637ed4 RG |
49 | enodev() |
50 | { | |
51 | ||
52 | return (ENODEV); | |
53 | } | |
54 | ||
55 | /* | |
56 | * Unconfigured device function; driver not configured. | |
57 | */ | |
4c45483e | 58 | int |
15637ed4 RG |
59 | enxio() |
60 | { | |
61 | ||
62 | return (ENXIO); | |
63 | } | |
64 | ||
65 | /* | |
66 | * Unsupported ioctl function. | |
67 | */ | |
4c45483e | 68 | int |
15637ed4 RG |
69 | enoioctl() |
70 | { | |
71 | ||
72 | return (ENOTTY); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Unsupported system function. | |
77 | * This is used for an otherwise-reasonable operation | |
78 | * that is not supported by the current system binary. | |
79 | */ | |
4c45483e | 80 | int |
15637ed4 RG |
81 | enosys() |
82 | { | |
83 | ||
84 | return (ENOSYS); | |
85 | } | |
86 | ||
87 | /* | |
88 | * Return error for operation not supported | |
89 | * on a specific object or file type. | |
90 | */ | |
4c45483e | 91 | int |
15637ed4 RG |
92 | eopnotsupp() |
93 | { | |
94 | ||
95 | return (EOPNOTSUPP); | |
96 | } | |
97 | ||
98 | /* | |
99 | * Generic null operation, always returns success. | |
100 | */ | |
4c45483e | 101 | int |
15637ed4 RG |
102 | nullop() |
103 | { | |
104 | ||
105 | return (0); | |
106 | } | |
107 | ||
108 | /* | |
109 | * Definitions of various trivial functions; | |
110 | * usually expanded inline rather than being defined here. | |
111 | */ | |
112 | #ifdef NEED_MINMAX | |
113 | imin(a, b) | |
114 | int a, b; | |
115 | { | |
116 | ||
117 | return (a < b ? a : b); | |
118 | } | |
119 | ||
120 | imax(a, b) | |
121 | int a, b; | |
122 | { | |
123 | ||
124 | return (a > b ? a : b); | |
125 | } | |
126 | ||
127 | unsigned int | |
128 | min(a, b) | |
129 | unsigned int a, b; | |
130 | { | |
131 | ||
132 | return (a < b ? a : b); | |
133 | } | |
134 | ||
135 | unsigned int | |
136 | max(a, b) | |
137 | unsigned int a, b; | |
138 | { | |
139 | ||
140 | return (a > b ? a : b); | |
141 | } | |
142 | ||
143 | long | |
144 | lmin(a, b) | |
145 | long a, b; | |
146 | { | |
147 | ||
148 | return (a < b ? a : b); | |
149 | } | |
150 | ||
151 | long | |
152 | lmax(a, b) | |
153 | long a, b; | |
154 | { | |
155 | ||
156 | return (a > b ? a : b); | |
157 | } | |
158 | ||
159 | unsigned long | |
160 | ulmin(a, b) | |
161 | unsigned long a, b; | |
162 | { | |
163 | ||
164 | return (a < b ? a : b); | |
165 | } | |
166 | ||
167 | unsigned long | |
168 | ulmax(a, b) | |
169 | unsigned long a, b; | |
170 | { | |
171 | ||
172 | return (a > b ? a : b); | |
173 | } | |
174 | #endif /* NEED_MINMAX */ | |
175 | ||
176 | #ifdef NEED_FFS | |
177 | ffs(mask) | |
178 | register long mask; | |
179 | { | |
180 | register int bit; | |
181 | ||
182 | if (!mask) | |
183 | return(0); | |
184 | for (bit = 1;; ++bit) { | |
185 | if (mask&0x01) | |
186 | return(bit); | |
187 | mask >>= 1; | |
188 | } | |
189 | } | |
190 | #endif /* NEED_FFS */ | |
191 | ||
192 | #ifdef NEED_BCMP | |
193 | bcmp(v1, v2, len) | |
194 | void *v1, *v2; | |
195 | register unsigned len; | |
196 | { | |
197 | register u_char *s1 = v1, *s2 = v2; | |
198 | ||
199 | while (len--) | |
200 | if (*s1++ != *s2++) | |
201 | return (1); | |
202 | return (0); | |
203 | } | |
204 | #endif /* NEED_BCMP */ | |
205 | ||
206 | #ifdef NEED_STRLEN | |
207 | size_t | |
208 | strlen(s1) | |
209 | register const char *s1; | |
210 | { | |
211 | register size_t len; | |
212 | ||
213 | for (len = 0; *s1++ != '\0'; len++) | |
214 | ; | |
215 | return (len); | |
216 | } | |
217 | #endif /* NEED_STRLEN */ |