src/basics/lstypes.lsp

   1 ;;; -*- mode: lisp -*-
   2
   3 ;;; Copyright (c) 2005--2008, by A.J. Rossini <blindglobe@gmail.com>
   4 ;;; See COPYRIGHT file for any additional restrictions (BSD license).
   5 ;;; Since 1991, ANSI was finally finished.  Edited for ANSI Common Lisp.
   6
   7 (in-package :lisp-stat-types)
   8
   9 ;;; Type Checking Functions
  10 ;;; (Moved out of lsbasics.lsp, placed there by initial design).
  11
  12 (defun fixnump (x)
  13   "Args: (x)
  14
  15 Returns T if X is a fixnum; NIL otherwise."
  16   (declare (inline typep))
  17   (typep x 'fixnum))
  18
  19 (defun check-nonneg-fixnum (x)
  20   "Ensure that x or all elts of x are non-negative fixnums."
  21   (cond ((typep x 'sequence) ;; seq rather than list, allows for vector?
  22          (map 'list #'check-one-nonneg-fixnum x))
  23         (t (check-one-nonneg-fixnum x))))
  24
  25 (defun check-one-nonneg-fixnum (x)
  26   "return value if true, throw error otherwise."
  27   (if (and (fixnump x) (<= 0 x))
  28       x
  29       (error "Expected non-negative fixnum, but got ~A" x)))
  30
  31 (defun check-one-fixnum (x)
  32   (if (not (fixnump x))
  33       (error "not a fixnum - ~a" x)))
  34
  35 (defun check-one-real (a)
  36   (if (not (or (rationalp a) (floatp a)))
  37       (error "not a real number ~s" a)
  38     t))
  39
  40 (defun check-one-number (a)
  41   (if (not (numberp a))
  42       (error "not a number ~s" a)
  43     t))