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Diffstat (limited to 'src/lib/libc/string/strcspn.3')
-rw-r--r-- | src/lib/libc/string/strcspn.3 | 108 |
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diff --git a/src/lib/libc/string/strcspn.3 b/src/lib/libc/string/strcspn.3 deleted file mode 100644 index 91e5c3f1cc..0000000000 --- a/src/lib/libc/string/strcspn.3 +++ /dev/null | |||
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1 | .\" $OpenBSD: strcspn.3,v 1.12 2024/12/11 23:28:20 jsg Exp $ | ||
2 | .\" | ||
3 | .\" Copyright (c) 1990, 1991 The Regents of the University of California. | ||
4 | .\" All rights reserved. | ||
5 | .\" | ||
6 | .\" This code is derived from software contributed to Berkeley by | ||
7 | .\" Chris Torek and the American National Standards Committee X3, | ||
8 | .\" on Information Processing Systems. | ||
9 | .\" | ||
10 | .\" Redistribution and use in source and binary forms, with or without | ||
11 | .\" modification, are permitted provided that the following conditions | ||
12 | .\" are met: | ||
13 | .\" 1. Redistributions of source code must retain the above copyright | ||
14 | .\" notice, this list of conditions and the following disclaimer. | ||
15 | .\" 2. Redistributions in binary form must reproduce the above copyright | ||
16 | .\" notice, this list of conditions and the following disclaimer in the | ||
17 | .\" documentation and/or other materials provided with the distribution. | ||
18 | .\" 3. Neither the name of the University nor the names of its contributors | ||
19 | .\" may be used to endorse or promote products derived from this software | ||
20 | .\" without specific prior written permission. | ||
21 | .\" | ||
22 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | ||
23 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
24 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
25 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | ||
26 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
27 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
28 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
29 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
30 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
31 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
32 | .\" SUCH DAMAGE. | ||
33 | .\" | ||
34 | .Dd $Mdocdate: December 11 2024 $ | ||
35 | .Dt STRCSPN 3 | ||
36 | .Os | ||
37 | .Sh NAME | ||
38 | .Nm strcspn | ||
39 | .Nd span the complement of a string | ||
40 | .Sh SYNOPSIS | ||
41 | .In string.h | ||
42 | .Ft size_t | ||
43 | .Fn strcspn "const char *s" "const char *charset" | ||
44 | .Sh DESCRIPTION | ||
45 | The | ||
46 | .Fn strcspn | ||
47 | function spans the initial part of the NUL-terminated string | ||
48 | .Fa s | ||
49 | as long as the characters from | ||
50 | .Fa s | ||
51 | do not occur in string | ||
52 | .Fa charset | ||
53 | (it spans the | ||
54 | .Em complement | ||
55 | of | ||
56 | .Fa charset ) . | ||
57 | .Sh RETURN VALUES | ||
58 | The | ||
59 | .Fn strcspn | ||
60 | function returns the number of characters spanned. | ||
61 | .Sh EXAMPLES | ||
62 | The following call to | ||
63 | .Fn strcspn | ||
64 | will return 3, since the first three characters of string | ||
65 | .Fa s | ||
66 | do not occur in string | ||
67 | .Fa charset : | ||
68 | .Bd -literal -offset indent | ||
69 | char *s = "foobar"; | ||
70 | char *charset = "bar"; | ||
71 | size_t span; | ||
72 | |||
73 | span = strcspn(s, charset); | ||
74 | .Ed | ||
75 | .Pp | ||
76 | The following removes the first (if any) newline character from string | ||
77 | .Fa line . | ||
78 | This is useful for trimming the newline after a | ||
79 | .Xr fgets 3 | ||
80 | call. | ||
81 | .Bd -literal -offset indent | ||
82 | char line[BUFSIZ]; | ||
83 | |||
84 | if (fgets(line, sizeof(line), fp) != NULL) | ||
85 | line[strcspn(line, "\en")] = '\e0'; | ||
86 | .Ed | ||
87 | .Sh SEE ALSO | ||
88 | .Xr memchr 3 , | ||
89 | .Xr strchr 3 , | ||
90 | .Xr strpbrk 3 , | ||
91 | .Xr strrchr 3 , | ||
92 | .Xr strsep 3 , | ||
93 | .Xr strspn 3 , | ||
94 | .Xr strstr 3 , | ||
95 | .Xr strtok 3 , | ||
96 | .Xr wcscspn 3 | ||
97 | .Sh STANDARDS | ||
98 | The | ||
99 | .Fn strcspn | ||
100 | function conforms to | ||
101 | .St -ansiC . | ||
102 | .Sh HISTORY | ||
103 | The | ||
104 | .Fn strcspn | ||
105 | function first appeared in | ||
106 | .At III | ||
107 | and was reimplemented for | ||
108 | .Bx 4.3 . | ||