Function null-pointer-p - cffi API documentation

Package: cffi

Function null-pointer-p

Lambda List

null-pointer-p (ptr)

Arguments

ptr -- A foreign pointer that may be a null pointer.

Return Value

T or NIL.

Details

The function null-pointer-p returns true if ptr is a null pointer and false otherwise.

Examples

  CFFI> (null-pointer-p (null-pointer))
  => T


  (defun contains-str-p (big little)
    (not (null-pointer-p
          (foreign-funcall "strstr" :string big :string little :pointer))))


  CFFI> (contains-str-p "Popcorns" "corn")
  => T
  CFFI> (contains-str-p "Popcorns" "salt")
  => NIL

See also