|STRSPN(3)||Linux Programmer's Manual||STRSPN(3)|
strspn, strcspn - get length of a prefix substring
size_t strspn(const char *s, const char *accept);
size_t strcspn(const char *s, const char *reject);
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.
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.
For an explanation of the terms used in this section, see attributes(7).
|strspn (), strcspn ()||Thread safety||MT-Safe|
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
This page is part of release 5.10 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.