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author | James LewisMoss <dres@debian.org> | 2001-07-27 23:45:29 -0400 |
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committer | Bryan Newbold <bnewbold@robocracy.org> | 2017-02-20 00:05:29 -0800 |
commit | f559c149c83da84d0b1c285f0298c84aec564af9 (patch) | |
tree | f1c91bcb9bb5e6dad87b643127c3f878d80d89ee /ratize.scm | |
parent | c394920caedf3dac1981bb6b10eeb47fd6e4bb21 (diff) | |
parent | 87b82b5822ca54228cfa6df29be3ad9d4bc47d16 (diff) | |
download | slib-f559c149c83da84d0b1c285f0298c84aec564af9.tar.gz slib-f559c149c83da84d0b1c285f0298c84aec564af9.zip |
Import Debian changes 2d2-1debian/2d2-1
slib (2d2-1) unstable; urgency=low
* New upstream version
* Revert back to free. Is now so.
slib (2d1-1) unstable; urgency=low
* New upstream version.
* Move to non-free. FSF pointed out license doesn't allow modified
versions to be distributed.
* Get a complete list of copyrights that apply to the source into
copyright file.
* Remove setup for guile 1.3.
* Remove postrm. Just calling install-info (lintian) Move install-info
call to prerm since doc-base doesn't do install-info.
slib (2c9-3) unstable; urgency=low
* Change info location to section "The Algorithmic Language Scheme" to
match up with where guile puts it's files.
* Postinst is running slibconfig now. (Closes: #75891)
slib (2c9-2) unstable; urgency=low
* Stop installing slibconfig (for guile).
* In postinst if /usr/sbin/slibconnfig exists call it (Close: #75843
#75891).
slib (2c9-1) unstable; urgency=low
* New upstream (Closes: #74760)
* replace string-index with strsrch:string-index in http-cgi.scm.
* Add doc-base support (Closes: #31163)
Diffstat (limited to 'ratize.scm')
-rw-r--r-- | ratize.scm | 26 |
1 files changed, 15 insertions, 11 deletions
@@ -1,13 +1,17 @@ -;;;; "ratize.scm" Convert number to rational number +;;;; "ratize.scm" Find simplest number ratios -(define (rational:simplest x y) - (define (sr x y) (let ((fx (floor x)) (fy (floor y))) - (cond ((not (< fx x)) fx) - ((= fx fy) (+ fx (/ (sr (/ (- y fy)) (/ (- x fx)))))) - (else (+ 1 fx))))) - (cond ((< y x) (rational:simplest y x)) - ((not (< x y)) (if (rational? x) x (slib:error))) +(define (find-ratio-between x y) + (define (sr x y) + (let ((fx (inexact->exact (floor x))) (fy (inexact->exact (floor y)))) + (cond ((>= fx x) (list fx 1)) + ((= fx fy) (let ((rat (sr (/ (- y fy)) (/ (- x fx))))) + (list (+ (cadr rat) (* fx (car rat))) (car rat)))) + (else (list (+ 1 fx) 1))))) + (cond ((< y x) (find-ratio-between y x)) + ((>= x y) (list x 1)) ((positive? x) (sr x y)) - ((negative? y) (- (sr (- y) (- x)))) - (else (if (and (exact? x) (exact? y)) 0 0.0)))) -(define (rationalize x e) (rational:simplest (- x e) (+ x e))) + ((negative? y) (let ((rat (sr (- y) (- x)))) + (list (- (car rat)) (cadr rat)))) + (else '(0 1)))) +(define (find-ratio x e) (find-ratio-between (- x e) (+ x e))) +(define (rationalize x e) (apply / (find-ratio x e))) |