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1 perry 1 STRTOK
2 !!!STRTOK
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 BUGS
7 RETURN VALUE
8 CONFORMING TO
9 SEE ALSO
10 ----
11 !!NAME
12
13
14 strtok, strtok_r - extract tokens from strings
15 !!SYNOPSIS
16
17
18 __#include
19 __''s''__, const char *__''delim''__);
20 char *strtok_r(char *__''s''__, const char *__''delim''__, char **__''ptrptr''__);
21 __
22 !!DESCRIPTION
23
24
25 A `token' is a nonempty string of characters not occurring
26 in the string ''delim'', followed by 0 or by a character
27 occurring in ''delim''.
28
29
30 The __strtok()__ function can be used to parse the string
31 ''s'' into tokens. The first call to __strtok()__
32 should have ''s'' as its first argument. Subsequent calls
33 should have the first argument set to NULL. Each call
34 returns a pointer to the next token, or NULL when no more
35 tokens are found.
36
37
38 If a token ends with a delimiter, this delimiting character
39 is overwritten with a 0 and a pointer to the next character
40 is saved for the next call to __strtok()__. The delimiter
41 string ''delim'' may be different for each
42 call.
43
44
45 The __strtok_r()__ function works the same as the
46 __strtok()__ function, but instead of using a static
47 buffer it uses a pointer to a user allocated char* pointer.
48 This pointer, the ''ptrptr'' parameter, must be the same
49 while parsing the same string.
50 !!BUGS
51
52
53 Never use these functions. If you do, note
54 that:
55
56
57 These functions modify their first argument.
58
59
60 The identity of the delimiting character is
61 lost.
62
63
64 These functions cannot be used on constant
65 strings.
66
67
68 The __strtok__() function uses a static buffer while
69 parsing, so it's not thread safe. Use __strtok_r__() if
70 this matters to you.
71 !!RETURN VALUE
72
73
74 The __strtok()__ function returns a pointer to the next
75 token, or NULL if there are no more tokens.
76 !!CONFORMING TO
77
78
79 strtok()
80
81
82 SVID 3, POSIX, BSD 4.3, ISO 9899
83
84
85 strtok_r()
86
87
88 POSIX.1c
89 !!SEE ALSO
90
91
92 index(3), memchr(3), rindex(3),
93 strchr(3), strpbrk(3), strsep(3),
94 strspn(3), strstr(3)
95 ----
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