mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-30 00:40:20 +02:00
66ff15e2f0
* module/Makefile.am: Add language/sassy.scm. Probably EXTRA_DIST the dependant files, too. * module/language/sassy.scm: New file, the sassy loader. Sassy is originally R5RS code that loads a number of files. I've converted that toplevel file to be a Guile module that *includes* the subfiles, so that it all gets compiled together. It's a pretty bad hack though, because what I should be doing is including them relative to the sassy.scm source location, but we don't know that at expansion time. Something to fix. really bad hack in it so that it will compile correctly -- p * module/language/sassy/: All the sassy files and some changelog information. All of these files are LGPLv2.1+, so they can be included in Guile. * test-suite/standalone/sassy/tests/: Add the sassy unit tests. * test-suite/standalone/Makefile.am: * test-suite/standalone/test-sassy: Hook the sassy unit tests up to our test suite.
108 lines
3.7 KiB
Scheme
108 lines
3.7 KiB
Scheme
; numbers.scm - Sassy's number predicates
|
|
; Copyright (C) 2005 Jonathan Kraut
|
|
|
|
; 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 2.1 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 St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
; Contact:
|
|
; Jonathan Kraut
|
|
; 4130 43 ST #C2
|
|
; Sunnyside, NY 11104
|
|
; jak76@columbia.edu
|
|
|
|
; see file COPYING in the top of Sassy's distribution directory
|
|
|
|
|
|
; module numbers
|
|
; import srfi-60
|
|
; import-syntax meta-lambda
|
|
; export all
|
|
|
|
; also loads "other/srfi-56-pieces.scm"
|
|
|
|
(define s-byte #f)
|
|
(define s-word #f)
|
|
(define s-dword #f)
|
|
(define s-qword #f)
|
|
(define u-byte #f)
|
|
(define u-word #f)
|
|
(define u-dword #f)
|
|
(define u-qword #f)
|
|
|
|
(let ((signed-x (lambda (bitfield)
|
|
(lambda (number)
|
|
(and (integer? number)
|
|
(let ((tester (logand number bitfield)))
|
|
(or (zero? tester) (= tester bitfield)))))))
|
|
(unsigned-x (lambda (bitfield)
|
|
(lambda (number)
|
|
(and (integer? number)
|
|
(= bitfield (logior number bitfield)))))))
|
|
(define s-byte-x (signed-x (- (expt 2 7))))
|
|
(define s-word-x (signed-x (- (expt 2 15))))
|
|
(define s-dword-x (signed-x (- (expt 2 31))))
|
|
(define s-qword-x (signed-x (- (expt 2 63))))
|
|
(define u-byte-x (unsigned-x (- (expt 2 8) 1)))
|
|
(define u-word-x (unsigned-x (- (expt 2 16) 1)))
|
|
(define u-dword-x (unsigned-x (- (expt 2 32) 1)))
|
|
(define u-qword-x (unsigned-x (- (expt 2 64) 1)))
|
|
(let ((num-x (lambda (pred key)
|
|
(meta-lambda
|
|
(or ,@pred
|
|
(and ,key pred))))))
|
|
(set! s-byte (memoize (num-x s-byte-x 'byte)))
|
|
(set! s-word (memoize (num-x s-word-x 'word)))
|
|
(set! s-dword (memoize (num-x s-dword-x 'dword)))
|
|
(set! s-qword (memoize (num-x s-qword-x 'qword)))
|
|
(set! u-byte (memoize (num-x u-byte-x 'byte)))
|
|
(set! u-word (memoize (num-x u-word-x 'word)))
|
|
(set! u-dword (memoize (num-x u-dword-x 'dword)))
|
|
(set! u-qword (memoize (num-x u-qword-x 'qword)))))
|
|
|
|
|
|
(define (u/s-byte x) (or (s-byte x) (u-byte x)))
|
|
(define (u/s-word x) (or (s-word x) (u-word x)))
|
|
(define (u/s-dword x) (or (s-dword x) (u-dword x) (real? x)))
|
|
(define (u/s-qword x) (or (s-qword x) (u-qword x) (real? x)))
|
|
|
|
|
|
; The byte-list returned is little-endian
|
|
(define (number->byte-list number size)
|
|
(cond ((integer? number) (integer->byte-list number size))
|
|
((real? number)
|
|
(cond ((= 4 size) (float32->byte-list number))
|
|
((= 8 size) (float64->byte-list number))
|
|
(else (error "bad size for float" number size))))
|
|
(else (error "not a number sassy can assemble" number))))
|
|
|
|
|
|
; The following all return little-endian byte-lists
|
|
|
|
; Very few scheme implementations provide something like
|
|
; integer->bytes or float->bytes. Those that do (including slib)
|
|
; return a string, so I would have write:
|
|
; (map char->integer (string->list (integer/float->bytes ...)))
|
|
; which is less efficient for sassy. So I'm using these instead...
|
|
|
|
(define (integer->byte-list orig-int orig-size)
|
|
(let iter ((int orig-int) (size orig-size))
|
|
(if (zero? size)
|
|
(if (or (zero? orig-int)
|
|
(and (positive? orig-int) (zero? int))
|
|
(and (negative? orig-int) (= -1 int)))
|
|
'()
|
|
(error "integer too big for field width" orig-int orig-size))
|
|
(cons (logand int 255) (iter (ash int -8) (- size 1))))))
|
|
|
|
; (load "other/srfi-56-pieces.scm")
|