strspn(3) Library Functions Manual strspn(3) NAME strspn, strcspn - get length of a prefix substring LIBRARY Standard C library (libc, -lc) 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 seg- ment of s which consist only of bytes from accept. The strcspn() function returns the number of bytes in the initial seg- ment of s which are not in the string reject. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │strspn(), strcspn() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD. SEE ALSO memchr(3), strchr(3), string(3), strpbrk(3), strsep(3), strstr(3), str- tok(3), wcscspn(3), wcsspn(3) Linux man-pages 6.03 2023-01-05 strspn(3)
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