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Add bfs.

master
Sergiu Ivanov 8 months ago
parent
commit
d51b24a8c4
  1. 18
      graph.rkt

18
graph.rkt

@ -32,6 +32,8 @@
undirected-graph directed-graph
matrix-graph?
bfs
graphviz)
;; Wrap the opaque graph structure coming from the generic
@ -108,6 +110,11 @@
(define (matrix-graph? g)
(g:matrix-graph? (gg g)))
;; 4 Basic Graph Functions
;; 4.1 Breadth-first Search
(define (bfs g source)
(g:bfs (gg g) source))
;; 10 Graphviz
(define (graphviz g #:output [output #f] #:colors [colors #f])
(g:graphviz (gg g) #:output output #:colors colors)))
@ -155,6 +162,11 @@
;; 2.3 Matrix Graphs
[matrix-graph? (-> Graph Boolean)]
;; 4 Basic Graph Functions
;; 4.1 Breadth-first Search
[bfs (-> Graph Any (Values (Mutable-HashTable Any Number)
(Mutable-HashTable Any Any)))]
;; 10 Graphviz
[graphviz (->* (Graph)
(#:output Output-Port
@ -230,6 +242,12 @@
;; 2.3 Matrix Graphs
(check-false (matrix-graph? (directed-graph '((a b) (b c))))))
(test-case "4 Basic Graph Functions"
;; 4.1 Breadth-first Search
(define-values (bfs-lens bfs-tree) (bfs (directed-graph '((a b) (b c))) 'a))
(check-equal? (hash->ordered-list bfs-lens) '((c . 2) (a . 0) (b . 1)))
(check-equal? (hash->ordered-list bfs-tree) '((a . #f) (b . a) (c . b))))
(test-case "10 Graphviz"
(define g (directed-graph '((a b) (b c))))
(check-equal? (graphviz g)

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