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Command: strspn | Section: 3 | Source: OpenBSD | File: strspn.3
STRSPN(3) FreeBSD Library Functions Manual STRSPN(3)
NAME
strspn - span a string
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
memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3),
strstr(3), strtok(3), wcsspn(3)
STANDARDS
The strspn() function conforms to ANSI X3.159-1989 ("ANSI C89").
HISTORY
The strspn() function first appeared in AT&T System III UNIX and was
reimplemented for 4.3BSD.
FreeBSD 14.1-RELEASE-p8 December 11, 2024 FreeBSD 14.1-RELEASE-p8