suzanne.soy/racket
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

corrected: planet version-comparison repair from Danny

Browse Source 
svn: r10246
This commit is contained in:
Matthew Flatt 2008-06-13 13:18:30 +00:00
parent ce6395129c
commit d750ba0009
1 changed files with 35 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
collects/planet/private/planet-shared.ss
View File

@ -249,25 +249,49 @@ Various common pieces of code that both the client and server need to access
(define-struct mz-version (major minor))
;; string->mz-version : string -> mz-version | #f
;; Converts a string into mz-version. We need to account
;; for the change in numbering style from the 372 era to the 4.0 era.
(define (string->mz-version str)
(define (minor+maint-chunks->minor chunks)
(+ (* (string->number (car chunks)) 1000)
(if (> (length chunks) 1)
(string->number (cadr chunks))
0)))
(cond
;; Old style numbering (with three digits in front)
[(regexp-match #rx"^([0-9][0-9][0-9])([.0-9]*)$" str)
;; Old style numbering with three digits in front. The first digit
;; goes up to three.
[(regexp-match #rx"^([0-3][0-9][0-9])\\.?([.0-9]*)$" str)
=>
(lambda (ver)
(let* ([major&minor (string->number (list-ref ver 1))])
(make-mz-version (remainder (quotient major&minor 100) 10)
(remainder (quotient major&minor 10) 10))))]
(let ([major (string->number (list-ref ver 1))])
(cond
[(= (string-length (list-ref ver 2)) 0)
(make-mz-version major 0)]
[else
(let* ([minor+maint (regexp-split #rx"\\." (list-ref ver 2))]
[minor (minor+maint-chunks->minor minor+maint)])
(make-mz-version major minor))])))]
;; New style numbering
[(regexp-match #rx"^([0-9]+)(\\.([0-9]+))?$" str)
[(regexp-match #rx"^([0-9]+)(\\.([.0-9]+))?$" str)
=>
(lambda (ver)
(make-mz-version
(string->number (list-ref ver 1))
(if (list-ref ver 3)
(string->number (list-ref ver 3))
0)))]
(cond [(list-ref ver 3)
(let* ([chunks (regexp-split #rx"\\." (list-ref ver 3))])
(make-mz-version (+ (* (string->number (list-ref ver 1))
100)
(if (> (length chunks) 0)
(string->number (car chunks))
0))
(if (> (length (cdr chunks)) 0)
(minor+maint-chunks->minor (cdr chunks))
0)))]
[else
(make-mz-version (* (string->number (list-ref ver 1))
100)
0)]))]
[else #f]))