1 | ;-*- Mode: Lisp -*- |
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2 | ;;;; Author: Paul Dietz |
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3 | ;;;; Created: Thu Sep 11 20:45:17 2003 |
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4 | ;;;; Contains: Tests of LDB |
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5 | |
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6 | (in-package :cl-test) |
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7 | |
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8 | ;;; Error tests |
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9 | |
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10 | (deftest ldb.error.1 |
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11 | (signals-error (ldb) program-error) |
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12 | t) |
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13 | |
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14 | (deftest ldb.error.2 |
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15 | (signals-error (ldb (byte 1 1)) program-error) |
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16 | t) |
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17 | |
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18 | (deftest ldb.error.3 |
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19 | (signals-error (ldb (byte 1 1) -1 0) program-error) |
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20 | t) |
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21 | |
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22 | ;;; Non-error tests |
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23 | |
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24 | (deftest ldb.1 |
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25 | (loop for x = (random-fixnum) |
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26 | for pos = (random 30) |
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27 | for size = (random 30) |
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28 | repeat 10000 |
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29 | unless (eql (ldb (byte size pos) x) |
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30 | (logand (1- (ash 1 size)) |
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31 | (ash x (- pos)))) |
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32 | collect (list x pos size)) |
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33 | nil) |
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34 | |
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35 | |
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36 | (deftest ldb.2 |
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37 | (let ((bound (ash 1 300))) |
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38 | (loop for x = (random-from-interval bound) |
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39 | for pos = (random 300) |
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40 | for size = (random 300) |
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41 | repeat 1000 |
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42 | unless (eql (ldb (byte size pos) x) |
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43 | (logand (1- (ash 1 size)) |
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44 | (ash x (- pos)))) |
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45 | collect (list x pos size))) |
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46 | nil) |
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47 | |
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48 | (deftest ldb.3 |
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49 | (loop for i of-type fixnum from -1000 to 1000 |
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50 | always (eql (ldb (byte 0 0) i) 0)) |
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51 | t) |
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52 | |
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53 | (deftest ldb.order.1 |
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54 | (let ((i 0) a b c d) |
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55 | (values |
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56 | (ldb (progn (setf a (incf i)) |
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57 | (byte (progn (setf b (incf i)) 3) |
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58 | (progn (setf c (incf i)) 1))) |
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59 | (progn (setf d (incf i)) -1)) |
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60 | i a b c d)) |
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61 | 7 4 1 2 3 4) |
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62 | |
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63 | ;;; ldb on places |
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64 | |
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65 | (deftest ldb.place.1 |
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66 | (let ((x 0)) |
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67 | (values |
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68 | (setf (ldb (byte 4 1) x) -1) |
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69 | x)) |
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70 | -1 30) |
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71 | |
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72 | (deftest ldb.place.2 |
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73 | (loop for pos from 0 to 100 |
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74 | always |
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75 | (loop for size from 0 to 100 |
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76 | always |
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77 | (let ((x 0)) |
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78 | (and (eql (setf (ldb (byte size pos) x) -1) -1) |
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79 | (eql x (ash (1- (ash 1 size)) pos)))))) |
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80 | t) |
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81 | |
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82 | (deftest ldb.place.order.1 |
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83 | (let ((i 0) a b c d e f (x (copy-seq #(63)))) |
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84 | (values |
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85 | (setf (ldb (progn (setf a (incf i)) |
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86 | (byte (progn (setf b (incf i)) 3) |
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87 | (progn (setf c (incf i)) 1))) |
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88 | (aref (progn (setf d (incf i)) x) |
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89 | (progn (setf e (incf i)) 0))) |
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90 | (progn (setf f (incf i)) 0)) |
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91 | x |
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92 | i a b c d e f)) |
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93 | 0 #(49) 6 1 2 3 4 5 6) |
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