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