| author |
Steve Losh <steve@stevelosh.com> |
| date |
Fri, 22 Feb 2019 19:00:15 -0500 |
| parents |
9b2cfb112dd6 |
| children |
ca95211a2d98 |
(in-package :rosalind)
;;;; Misc ---------------------------------------------------------------------
(defun sh (command input)
(declare (ignorable command input))
#+sbcl
(sb-ext:run-program (first command) (rest command)
:search t
:input (make-string-input-stream input))
#+ccl
(ccl:run-program (first command) (rest command)
:input (make-string-input-stream input))
#+abcl
(let ((p (system:run-program (first command) (rest command)
:input :stream
:output t
:wait nil)))
(write-string input (system:process-input p))
(close (system:process-input p)))
#-(or sbcl ccl abcl)
(error "Not implemented for this Lisp implementation, sorry"))
(defun pbcopy (string)
(values string (sh '("pbcopy") string)))
(defun ensure-stream (input)
(ctypecase input
(stream input)
(string (make-string-input-stream input))))
(defun ensure-string (input)
(ctypecase input
(stream (alexandria:read-stream-content-into-string input))
(string (copy-seq input))))
(defun hamming (sequence1 sequence2 &key (test #'eql))
"Return the Hamming distance between `sequence1` and `sequence2`."
;; todo assert length=?
(let ((result 0))
(map nil (lambda (x y)
(unless (funcall test x y)
(incf result)))
sequence1
sequence2)
result))
(defun factorial (x)
(check-type x (integer 0))
(iterate (for i :from 1 :to x)
(multiplying i)))
(defun permutations (items)
(gathering (alexandria:map-permutations #'gather items)))
(defun dna-complement (base)
(ecase base
(#\A #\T)
(#\T #\A)
(#\G #\C)
(#\C #\G)))
(defun rna-complement (base)
(ecase base
(#\A #\U)
(#\U #\A)
(#\G #\C)
(#\C #\G)))
(defun rings (base)
"Return the number of rings in the structure of `base`.
Pyrimidines (cytosine, thymine, and uracil) have a single-ring structure.
Purines (adenine and guanine) have a double-ring structure.
"
(ecase base
((#\A #\G) 2)
((#\C #\T #\U) 1)))
(defun mapcount (predicate sequence &rest more-sequences)
"Map `predicate` across sequences, counting satisfactory applications."
(let ((result 0))
(apply #'map nil
(lambda (&rest args)
(when (apply predicate args)
(incf result)))
sequence more-sequences)
result))
;;;; Math ---------------------------------------------------------------------
(defmacro do-sum ((var from to) &body body)
"Sum `body` with `var` iterating over `[from, to]`.
It's just Σ:
to
===
\
> body
/
===
n = from
"
(once-only (to)
(with-gensyms (result)
`(do ((,var ,from (1+ ,var))
(,result 0))
((> ,var ,to) ,result)
(incf ,result (progn ,@body))))))
(defmacro do-product ((var from to) &body body)
"Multiply `body` with `var` iterating over `[from, to]`.
It's just Π:
to
=====
| |
| | body
| |
n = from
"
(once-only (to)
(with-gensyms (result)
`(do ((,var ,from (1+ ,var))
(,result 1))
((> ,var ,to) ,result)
(setf ,result (* ,result (progn ,@body)))))))
(defmacro Σ (bindings &body body) ;; lol
`(do-sum ,bindings ,@body))
(defmacro Π (bindings &body body) ;; lol
`(do-product ,bindings ,@body))
(defun binomial-coefficient (n k)
"Return `n` choose `k`."
;; https://en.wikipedia.org/wiki/Binomial_coefficient#Multiplicative_formula
(Π (i 1 k)
(/ (- (1+ n) i) i)))
;;;; Iterate ------------------------------------------------------------------
(defmacro-driver (FOR var SEED seed THEN then)
"Bind `var` to `seed` initially, then to `then` on every iteration.
This differs from `(FOR … FIRST … THEN …)` and `(FOR … INITIALLY … THEN …)`
because `then` is evaluated on every iteration, *including* the first.
Example:
(iterate
(repeat 3)
(for x :first 0 :then (1+ x))
(for y :initially 0 :then (1+ y))
(for z :seed 0 :then (1+ z))
(collect (list x y z)))
; =>
((0 0 1)
(1 1 2)
(2 2 3))
"
(let ((kwd (if generate 'generate 'for)))
`(progn
(,kwd ,var :next ,then)
(initially (setf ,var ,seed)))))
(defmacro-clause (RETURNING-FINAL form)
"Evaluate `form` each iteration and return its final value from the `iterate`.
Example:
(iterate
(for i :from 1 :to 4)
(collect (returning-final i) :into l)
(print l))
; =>
(1)
(1 2)
(1 2 3)
(1 2 3 4)
4
"
(with-gensyms (result)
`(progn
(with ,result)
(finally (return ,result))
(setf ,result ,form))))
;;;; Buffers ------------------------------------------------------------------
(defun make-buffer (&key initial-contents
(element-type t)
(initial-capacity (max 64 (length initial-contents))))
(let ((buffer (make-array initial-capacity
:element-type element-type
:adjustable t
:fill-pointer (length initial-contents))))
(when initial-contents
(replace buffer initial-contents))
buffer))
(defun make-string-buffer
(&key initial-contents
(initial-capacity (max 64 (length initial-contents))))
(make-buffer :initial-contents initial-contents
:initial-capacity initial-capacity
:element-type 'character))
(defun buffer-push (buffer element)
(vector-push-extend element buffer)
element)
(defun buffer-append (buffer sequence)
(let* ((l1 (length buffer))
(l2 (length sequence))
(needed (+ l1 l2)))
(when (< (array-total-size buffer) needed)
(adjust-array buffer (max needed (* l1 2))))
(setf (fill-pointer buffer) needed)
(replace buffer sequence :start1 l1)
sequence))
(defmacro-clause (BUFFERING expr &optional
APPEND (append nil)
INTO (var iterate::*result-var*)
INITIAL-CONTENTS (initial-contents '())
ELEMENT-TYPE (element-type t))
`(progn
(with ,var = (make-buffer :initial-contents ,initial-contents
:element-type ,element-type))
(,(if append 'buffer-append 'buffer-push) ,var ,expr)))
;;;; File Formats -------------------------------------------------------------
(defun read-fasta (stream)
"Read and return the next FASTA label/data pair from `stream`.
`(values label data)` will be returned for each label/data pair. All the
lines of FASTA data for a given label will be concatenated and returned as
a single buffer.
`(values nil nil)` will be returned if there is no remaining data.
"
(iterate
(with label = nil)
(case (peek-char nil stream nil :eof)
(:eof (finish))
(#\Newline (read-char stream))
(#\> (if label
(finish)
(setf label (subseq (read-line stream) 1))))
(t (buffering (read-line stream) :into data
:append t
:element-type 'character)))
(finally (return (values label data)))))
(defmacro-driver (FOR vars IN-FASTA source)
"Iterate over label/data pairs from the FASTA data in `source`.
`vars` must be a list of two symbols that will be bound to the label and data,
respectively, on each iteration.
`stream` can be either a string or a character input stream.
`generate` is supported.
Example:
(iterate
(with data = (remove #\\space \">foo
CATG
GGAA
>bar
CCCTTG
>baz
>frob\"))
(for (label dna) :in-fasta data)
(collect (list label dna)))
; =>
((\"foo\" \"CATGGGAA\")
(\"bar\" \"CCCTTG\")
(\"baz\" \"\")
(\"frob\" \"\"))
"
(destructuring-bind (label data) vars
(with-gensyms (stream)
(let ((kwd (if generate 'generate 'for)))
`(progn
(with ,stream = (ensure-stream ,source))
(,kwd (values ,label ,data) :next (multiple-value-bind (l d)
(read-fasta ,stream)
(if l
(values l d)
(terminate)))))))))
(defun read-fasta-into-hash-table (source)
"Return everything in the FASTA `source` as a hash table of labels to data."
(iterate (for (label data) :in-fasta source)
(collect-hash (label data) :test #'equal)))
(defun read-fasta-into-alist (source)
"Return everything in the FASTA `source` as an alist of labels to data."
(iterate (for (label data) :in-fasta source)
(collect (cons label data))))
;;;; Uniprot ------------------------------------------------------------------
(defparameter *uniprot-cache* (make-hash-table :test #'equal))
(defmacro get-cached (key cache expr)
(once-only (key cache)
(with-gensyms (value)
`(if-found (,value (gethash ,key ,cache))
,value
(setf (gethash ,key ,cache) ,expr)))))
(defun uniprot-url (id)
(format nil "http://www.uniprot.org/uniprot/~A.fasta" id))
(defun uniprot (id)
(get-cached id *uniprot-cache*
(-<> (uniprot-url id)
drakma:http-request
read-fasta-into-alist
first)))
;;;; Testing ------------------------------------------------------------------
(defmacro define-test (problem input output &optional (test 'string=))
`(test ,(symb 'test- problem)
(is (,test ,output (aesthetic-string (,problem ,input))))))
(defun run-tests ()
(1am:run))
;;;; Problems -----------------------------------------------------------------
(defmacro define-problem (name (arg type) sample-input sample-output &body body)
(multiple-value-bind (body declarations docstring)
(alexandria:parse-body body :documentation t)
(let ((symbol (symb 'problem- name)))
`(progn
(defun ,symbol (&optional (,arg ,sample-input))
,@(when docstring (list docstring))
,@declarations
(setf ,arg ,(ecase type
(string `(ensure-string ,arg))
(stream `(ensure-stream ,arg))))
(progn ,@body))
(setf (get ',symbol 'rosalind-name) ,(string-downcase name))
(define-test ,symbol ,sample-input ,sample-output)
',symbol))))
(defun problem-data-path (problem)
(format nil "~~/Downloads/rosalind_~A.txt" (get problem 'rosalind-name)))
(defun solve% (problem)
(with-open-file (input (problem-data-path problem))
(pbcopy (aesthetic-string (funcall problem input)))))
(defmacro solve (name)
`(solve% ',(symb 'problem- name)))