strcspn (3) - Linux Manuals
strcspn: get length of a prefix substring
strspn, strcspn - get length of a prefix substring
#include <string.h> size_t strspn(const char *s, const char *accept); size_t strcspn(const char *s, const char *reject);
DESCRIPTIONThe strspn() function calculates the length (in bytes) of the initial segment of s which consists entirely of bytes in accept.
RETURN VALUEThe strspn() function returns the number of bytes in the initial segment of s which consist only of bytes from accept.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|strspn(), strcspn()||Thread safety||MT-Safe|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
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