NAME
strcspn —
span the complement of a
string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
size_t
strcspn(
const
char *s,
const char
*charset);
DESCRIPTION
The
strcspn() function spans the initial part of the
nul-terminated string
s as long as the characters from
s do not occur in string
charset
(it spans the
complement of
charset).
RETURN VALUES
The
strcspn() function returns the number of characters
spanned.
EXAMPLES
The following call to
strcspn() will return 3, since the first
three characters of string
s do not occur in string
charset:
char *s = "foobar";
char *charset = "bar";
size_t span;
span = strcspn(s, charset);
SEE ALSO
index(3),
memchr(3),
rindex(3),
strchr(3),
strpbrk(3),
strrchr(3),
strsep(3),
strspn(3),
strstr(3),
strtok(3)
STANDARDS
The
strcspn() function conforms to
ANSI
X3.159-1989 (“ANSI C89”).