110 lines
4.1 KiB
Scheme
110 lines
4.1 KiB
Scheme
; Copyright (c) 2003 RT Happe <rthappe at web de>
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; See the file COPYING distributed with the Scheme Untergrund Library
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;;; refers to structure KRIMS from sunterlib/s48/krims
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;; sequences as data + behaviour
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(define-structure absequences absequences-face
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(open srfi-9+ ; define-record-type -discloser
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krims ; assert
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let-opt ; let-optionals [ from scsh ]
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scheme)
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(files uniseqs))
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;; specialists for lists, vectors, strings
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(define-structure sequence-specifics sequence-specifics-face
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(open srfi-1 ; list procs
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srfi-13 ; string procs
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scheme)
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(files specseqs))
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;; basic sequence accessors etc.
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(define-structure sequence-basics sequence-basics-face
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(open krims ; gen-dispatch
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let-opt ; :optional [ from scsh ]
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sequence-specifics ; list-set! make-list
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absequences
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byte-vectors
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srfi-1 ; make-list
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srfi-23 ; error
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scheme)
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(files baseqs))
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;; sequence operations defined in terms of the basic protocol
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(define-structure sequence-extras sequence-extras-face
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(open sequence-basics
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krims ; assert
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util ; unspecific
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srfi-1+ ; append! rest
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srfi-23 ; error
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let-opt ; let-optionals [ from scsh ]
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scheme)
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(files genseqs))
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;; sequence procedures specialised to vectors
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(define-structure vector-lib vector-lib-face
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(open krims ; assert
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util ; unspecific
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let-opt ; let-optionals [ from scsh ]
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srfi-1+ ; append! first rest
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scheme)
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;; bind the basic operations to vector specialists
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(begin
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(define sequence? vector?)
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(define sequence-length vector-length)
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(define sequence-ref vector-ref)
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(define sequence-set! vector-set!)
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(define (make-another-sequence v k . maybe-fill)
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(apply make-vector k maybe-fill)))
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(files genseqs)
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;; rename extras not supplied by scheme and def list->vector with opts
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(begin
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(define subvector subsequence)
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(define vector-copy sequence-copy)
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(define vector-fill! sequence-fill!) ; with opt. start & end
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(define vector-append sequence-append)
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(define vector-map sequence-map)
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(define vector-for-each sequence-for-each)
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(define vector-fold sequence-fold)
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(define vector-fold-right sequence-fold-right)
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(define vector-any sequence-any)
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(define vector-every sequence-every)
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(define vector= sequence=)
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(define vectors-map sequences-map)
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(define vectors-for-each sequences-for-each)
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(define vectors-fold sequences-fold)
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(define vectors-fold-right sequences-fold-right)
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(define vectors-any sequences-any)
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(define vectors-every sequences-every)
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(define vectors= sequences=)
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(define (list->vector xs . opts)
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(let-optionals opts ((start 0) (end (length xs)))
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(assert (<= 0 start end))
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(let ((v (make-vector (- end start))))
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(do ((i start (+ i 1))
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(ys xs (rest ys)))
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((= i end) v)
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(vector-set! v (- i start) (first ys))))))
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))
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;; elementary and other general sequence operations, typically dispatching
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;; early on the sequence type in order to make use of built-ins or special
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;; code (notably for lists)
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(define-structure sequence-lib (compound-interface sequence-basics-face
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sequence-extras-face
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absequences-face)
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(open (with-prefix sequence-extras contiguous-)
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sequence-basics
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absequences
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sequence-specifics
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vector-lib
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srfi-1 ; list procs
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srfi-13 ; string procs
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byte-vectors
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let-opt ; let-optionals [ from scsh ]
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scheme)
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(files composeqs))
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