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guile/test-suite/tests/srfi-60.test
Mark H Weaver 7f8ad91b99 SRFI-60: Reimplement 'rotate-bit-field' on inums to be more portable. 
* libguile/srfi-60.c (scm_srfi60_rotate_bit_field): Avoid division by
  zero in the (start == end) case.  Rewrite inum case to work with
  unsigned integers in two's complement format.

* test-suite/tests/srfi-60.test ("rotate-bit-field"): Add more tests.
2014-03-11 21:39:26 -04:00

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;;;; srfi-60.test --- Test suite for Guile's SRFI-60 functions. -*- scheme -*-
;;;;
;;;; Copyright 2005, 2006 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
(define-module (test-srfi-60)
#:duplicates (last) ;; avoid warning about srfi-60 replacing `bit-count'
#:use-module (test-suite lib)
#:use-module (srfi srfi-60))
(pass-if "cond-expand srfi-60"
(cond-expand (srfi-60 #t)
(else #f)))
;;
;; logand
;;
(with-test-prefix "logand"
(pass-if (eqv? 6 (logand 14 6))))
;;
;; bitwise-and
;;
(with-test-prefix "bitwise-and"
(pass-if (eqv? 6 (bitwise-and 14 6))))
;;
;; logior
;;
(with-test-prefix "logior"
(pass-if (eqv? 14 (logior 10 12))))
;;
;; bitwise-ior
;;
(with-test-prefix "bitwise-ior"
(pass-if (eqv? 14 (bitwise-ior 10 12))))
;;
;; logxor
;;
(with-test-prefix "logxor"
(pass-if (eqv? 6 (logxor 10 12))))
;;
;; bitwise-xor
;;
(with-test-prefix "bitwise-xor"
(pass-if (eqv? 6 (bitwise-xor 10 12))))
;;
;; lognot
;;
(with-test-prefix "lognot"
(pass-if (eqv? -1 (lognot 0)))
(pass-if (eqv? 0 (lognot -1))))
;;
;; bitwise-not
;;
(with-test-prefix "bitwise-not"
(pass-if (eqv? -1 (bitwise-not 0)))
(pass-if (eqv? 0 (bitwise-not -1))))
;;
;; bitwise-if
;;
(with-test-prefix "bitwise-if"
(pass-if (eqv? 9 (bitwise-if 3 1 8)))
(pass-if (eqv? 0 (bitwise-if 3 8 1))))
;;
;; bitwise-merge
;;
(with-test-prefix "bitwise-merge"
(pass-if (eqv? 9 (bitwise-merge 3 1 8)))
(pass-if (eqv? 0 (bitwise-merge 3 8 1))))
;;
;; logtest
;;
(with-test-prefix "logtest"
(pass-if (eq? #t (logtest 3 6)))
(pass-if (eq? #f (logtest 3 12))))
;;
;; any-bits-set?
;;
(with-test-prefix "any-bits-set?"
(pass-if (eq? #t (any-bits-set? 3 6)))
(pass-if (eq? #f (any-bits-set? 3 12))))
;;
;; logcount
;;
(with-test-prefix "logcount"
(pass-if (eqv? 2 (logcount 12))))
;;
;; bit-count
;;
(with-test-prefix "bit-count"
(pass-if (eqv? 2 (bit-count 12))))
;;
;; integer-length
;;
(with-test-prefix "integer-length"
(pass-if (eqv? 0 (integer-length 0)))
(pass-if (eqv? 8 (integer-length 128)))
(pass-if (eqv? 8 (integer-length 255)))
(pass-if (eqv? 9 (integer-length 256))))
;;
;; log2-binary-factors
;;
(with-test-prefix "log2-binary-factors"
(pass-if (eqv? -1 (log2-binary-factors 0)))
(pass-if (eqv? 0 (log2-binary-factors 1)))
(pass-if (eqv? 0 (log2-binary-factors 3)))
(pass-if (eqv? 2 (log2-binary-factors 4)))
(pass-if (eqv? 1 (log2-binary-factors 6)))
(pass-if (eqv? 0 (log2-binary-factors -1)))
(pass-if (eqv? 1 (log2-binary-factors -2)))
(pass-if (eqv? 0 (log2-binary-factors -3)))
(pass-if (eqv? 2 (log2-binary-factors -4)))
(pass-if (eqv? 128 (log2-binary-factors #x100000000000000000000000000000000))))
;;
;; first-set-bit
;;
(with-test-prefix "first-set-bit"
(pass-if (eqv? -1 (first-set-bit 0)))
(pass-if (eqv? 0 (first-set-bit 1)))
(pass-if (eqv? 0 (first-set-bit 3)))
(pass-if (eqv? 2 (first-set-bit 4)))
(pass-if (eqv? 1 (first-set-bit 6)))
(pass-if (eqv? 0 (first-set-bit -1)))
(pass-if (eqv? 1 (first-set-bit -2)))
(pass-if (eqv? 0 (first-set-bit -3)))
(pass-if (eqv? 2 (first-set-bit -4))))
;;
;; logbit?
;;
(with-test-prefix "logbit?"
(pass-if (eq? #t (logbit? 0 1)))
(pass-if (eq? #f (logbit? 1 1)))
(pass-if (eq? #f (logbit? 1 8)))
(pass-if (eq? #t (logbit? 1000 -1))))
;;
;; bit-set?
;;
(with-test-prefix "bit-set?"
(pass-if (eq? #t (bit-set? 0 1)))
(pass-if (eq? #f (bit-set? 1 1)))
(pass-if (eq? #f (bit-set? 1 8)))
(pass-if (eq? #t (bit-set? 1000 -1))))
;;
;; copy-bit
;;
(with-test-prefix "copy-bit"
(pass-if (eqv? 0 (copy-bit 0 0 #f)))
(pass-if (eqv? 0 (copy-bit 30 0 #f)))
(pass-if (eqv? 0 (copy-bit 31 0 #f)))
(pass-if (eqv? 0 (copy-bit 62 0 #f)))
(pass-if (eqv? 0 (copy-bit 63 0 #f)))
(pass-if (eqv? 0 (copy-bit 128 0 #f)))
(pass-if (eqv? -1 (copy-bit 0 -1 #t)))
(pass-if (eqv? -1 (copy-bit 30 -1 #t)))
(pass-if (eqv? -1 (copy-bit 31 -1 #t)))
(pass-if (eqv? -1 (copy-bit 62 -1 #t)))
(pass-if (eqv? -1 (copy-bit 63 -1 #t)))
(pass-if (eqv? -1 (copy-bit 128 -1 #t)))
(pass-if (eqv? 1 (copy-bit 0 0 #t)))
(pass-if (eqv? #x106 (copy-bit 8 6 #t)))
(pass-if (eqv? 6 (copy-bit 8 6 #f)))
(pass-if (eqv? -2 (copy-bit 0 -1 #f)))
(pass-if "bignum becomes inum"
(eqv? 0 (copy-bit 128 #x100000000000000000000000000000000 #f)))
;; bignums unchanged
(pass-if (eqv? #x100000000000000000000000000000000
(copy-bit 128 #x100000000000000000000000000000000 #t)))
(pass-if (eqv? #x100000000000000000000000000000000
(copy-bit 64 #x100000000000000000000000000000000 #f)))
(pass-if (eqv? #x-100000000000000000000000000000000
(copy-bit 64 #x-100000000000000000000000000000000 #f)))
(pass-if (eqv? #x-100000000000000000000000000000000
(copy-bit 256 #x-100000000000000000000000000000000 #t))))
;;
;; bit-field
;;
(with-test-prefix "bit-field"
(pass-if (eqv? 0 (bit-field 6 0 1)))
(pass-if (eqv? 3 (bit-field 6 1 3)))
(pass-if (eqv? 1 (bit-field 6 2 999)))
(pass-if (eqv? 1 (bit-field #x100000000000000000000000000000000 128 129))))
;;
;; copy-bit-field
;;
(with-test-prefix "copy-bit-field"
(pass-if (eqv? #b111 (copy-bit-field #b110 1 0 1)))
(pass-if (eqv? #b110 (copy-bit-field #b110 1 1 2)))
(pass-if (eqv? #b010 (copy-bit-field #b110 1 1 3))))
;;
;; ash
;;
(with-test-prefix "ash"
(pass-if (eqv? 2 (ash 1 1)))
(pass-if (eqv? 0 (ash 1 -1))))
;;
;; arithmetic-shift
;;
(with-test-prefix "arithmetic-shift"
(pass-if (eqv? 2 (arithmetic-shift 1 1)))
(pass-if (eqv? 0 (arithmetic-shift 1 -1))))
;;
;; rotate-bit-field
;;
(with-test-prefix "rotate-bit-field"
(define-syntax-rule (check expected x count start end)
(begin
(pass-if-equal expected (rotate-bit-field x count start end))
(pass-if-equal (lognot expected)
(rotate-bit-field (lognot x) count start end))))
(check #b110 #b110 1 1 2)
(check #b1010 #b110 1 2 4)
(check #b1011 #b0111 -1 1 4)
(check #b0 #b0 128 0 256)
(check #b1 #b1 128 1 256)
(check #x100000000000000000000000000000000
#x100000000000000000000000000000000 128 0 64)
(check #x100000000000000000000000000000008
#x100000000000000000000000000000001 3 0 64)
(check #x100000000000000002000000000000000
#x100000000000000000000000000000001 -3 0 64)
(check #b110 #b110 0 0 10)
(check #b110 #b110 0 0 256)
(check #b110 #b110 1 1 1)
(check #b10111010001100111101110010101
#b11010001100111101110001110101 -26 5 28)
(check #b11000110011110111000111011001
#b11010001100111101110001110101 28 2 28)
(check #b01111010001100111101110010101
#b11010001100111101110001110101 -3 5 29)
(check #b10100011001111011100011101101
#b11010001100111101110001110101 28 2 29)
(check #b110110100011001111011100010101
#b011010001100111101110001110101 48 5 30)
(check #b110100011001111011100011101001
#b011010001100111101110001110101 85 2 30)
(check #b011010001100111101110001110101
#b110100011001111011100011101001 83 2 30)
(check
#b1101100110101001110000111110011010000111011101011101110111011
#b1100110101001110000111110011010000111011101011101110110111011 -3 5 60)
(check
#b1011010100111000011111001101000011101110101110111011011101110
#b1100110101001110000111110011010000111011101011101110110111011 62 0 60)
(check
#b1011100110101001110000111110011010000111011101011101110111011
#b1100110101001110000111110011010000111011101011101110110111011 53 5 61)
(check
#b1001101010011100001111100110100001110111010111011101101110111
#b1100110101001110000111110011010000111011101011101110110111011 62 0 61)
(check
#b11011001101010011100001111100110100001110111010111011100111011
#b01100110101001110000111110011010000111011101011101110110111011 53 7 62)
(check
#b11011001101010011100001111100110100001110111010111011100111011
#b01100110101001110000111110011010000111011101011101110110111011 -2 7 62)
(check
#b01100110101001110000111110011010000111011101011101110110111011
#b11011001101010011100001111100110100001110111010111011100111011 2 7 62)
(pass-if-equal "bignum becomes inum"
1
(rotate-bit-field #x100000000000000000000000000000000 1 0 129)))
;;
;; reverse-bit-field
;;
(with-test-prefix "reverse-bit-field"
(pass-if (eqv? 6 (reverse-bit-field 6 1 3)))
(pass-if (eqv? 12 (reverse-bit-field 6 1 4)))
(pass-if (eqv? #x80000000 (reverse-bit-field 1 0 32)))
(pass-if (eqv? #x40000000 (reverse-bit-field 1 0 31)))
(pass-if (eqv? #x20000000 (reverse-bit-field 1 0 30)))
(pass-if (eqv? (logior (ash -1 32) #xFBFFFFFF)
(reverse-bit-field -2 0 27)))
(pass-if (eqv? (logior (ash -1 32) #xF7FFFFFF)
(reverse-bit-field -2 0 28)))
(pass-if (eqv? (logior (ash -1 32) #xEFFFFFFF)
(reverse-bit-field -2 0 29)))
(pass-if (eqv? (logior (ash -1 32) #xDFFFFFFF)
(reverse-bit-field -2 0 30)))
(pass-if (eqv? (logior (ash -1 32) #xBFFFFFFF)
(reverse-bit-field -2 0 31)))
(pass-if (eqv? (logior (ash -1 32) #x7FFFFFFF)
(reverse-bit-field -2 0 32)))
(pass-if "bignum becomes inum"
(eqv? 5 (reverse-bit-field #x140000000000000000000000000000000 0 129))))
;;
;; integer->list
;;
(with-test-prefix "integer->list"
(pass-if (equal? '(#t #t #f) (integer->list 6)))
(pass-if (equal? '(#f #t #t #f) (integer->list 6 4)))
(pass-if (equal? '(#t #f) (integer->list 6 2)))
(pass-if "zeros above top of positive inum"
(equal? '(#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #t)
(integer->list 1 128)))
(pass-if "ones above top of negative inum"
(equal? '(#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t #t #t #t #t #t #t #t #t)
(integer->list -1 128)))
(pass-if (equal? '(#t
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f)
(integer->list #x100000000000000000000000000000000))))
;;
;; list->integer
;;
(with-test-prefix "list->integer"
(pass-if (eqv? 6 (list->integer '(#t #t #f))))
(pass-if (eqv? 6 (list->integer '(#f #t #t #f))))
(pass-if (eqv? 2 (list->integer '(#t #f))))
(pass-if "leading #f's"
(eqv? 1 (list->integer
'(#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #t))))
(pass-if (eqv? #x100000000000000000000000000000000
(list->integer
'(#t
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f
#f #f #f #f #f #f #f #f #f #f #f #f #f #f #f #f))))
(pass-if (eqv? #x03FFFFFF (list->integer '(#t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x07FFFFFF (list->integer '(#t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x0FFFFFFF (list->integer '(#t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x1FFFFFFF (list->integer '(#t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x3FFFFFFF (list->integer '(#t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x7FFFFFFF (list->integer '(#t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #xFFFFFFFF (list->integer '(#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t))))
(pass-if (eqv? #x1FFFFFFFF (list->integer '(#t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t
#t #t #t #t #t #t #t #t)))))
;;
;; list->integer
;;
(with-test-prefix "list->integer"
(pass-if (eqv? 0 (booleans->integer)))
(pass-if (eqv? 6 (booleans->integer #t #t #f))))
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