NAME
strspn —
span a string
LIBRARY
library “libc”
SYNOPSIS
#include
<string.h>
size_t
strspn(const
char *s, const char
*charset);
DESCRIPTION
Thestrspn()
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”).