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”).