strcspn(3)
strspn, strcspn – get length of a prefix substring
Synopsis
#include <string.h>
size_t strspn(const char *s, const char *accept);
size_t strcspn(const char *s, const char *reject);
Description
The strspn() function calculates the length (in bytes) of the initial segment of s which consists entirely of bytes in accept.
The strcspn() function calculates the length of the initial segment of s which consists entirely of bytes not in reject.
Return Value
The strspn() function returns the number of bytes in the initial segment of s which consist only of bytes from accept.
The strcspn() function returns the number of bytes in the initial segment of s which are not in the string reject.
Attributes
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
strspn(), strcspn() | Thread safety | MT-Safe |
Conforming To
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
See Also
index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strsep(3), strstr(3), strtok(3), wcscspn(3), wcsspn(3)
Colophon
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