strcspn(3)                                                   strcspn(3)

  strcspn()

  NAME

    strcspn() - span the complement of a string

  SYNOPSIS

    #include 

    size_t strcspn (const char *s, const char *charset)

  DESCRIPTION

    The strcspn(3) function spans the initial part of the null-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(3) function returns the number of characters spanned.

  SEE ALSO

    memchr(3)

    strchr(3)

    strpbrk(3)

    strrchr(3)

    strsep(3)

    strspn(3)

    strstr(3)

    strtok(3)

  USAGE NOTES

    The strcspn function is thread safe.

    The strcspn function is not async-signal safe.