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STRSPN(3) Library Functions Manual STRSPN(3) NAME strspn - span a string LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <string.h> size_t strspn(const char *s, const char *charset); DESCRIPTION The strspn() function spans the initial part of the nul-terminated string s as long as the characters from s occur in string charset. RETURN VALUES The strspn() function returns the number of characters spanned. EXAMPLES The following call to strspn() will return 3, since the first three characters of string s are part of string charset: char *s = "foobar"; char *charset = "of"; size_t span; span = strspn(s, charset); SEE ALSO index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strstr(3), strtok(3) STANDARDS The strspn() function conforms to ANSI X3.159-1989 ("ANSI C89"). NetBSD 9.99 August 11, 2002 NetBSD 9.99