141 lines
4.2 KiB
Scheme
141 lines
4.2 KiB
Scheme
; Copyright (c) 2003 RT Happe <rthappe at web de>
|
|
; See the file COPYING distributed with the Scheme Untergrund Library
|
|
|
|
;;; sequence operations definABLE in terms of the elementary operations
|
|
;;; with no regard to the concrete sequence type
|
|
|
|
(define (sequence->list s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector->list s opts))
|
|
((string? s)
|
|
(apply string->list s opts))
|
|
((pair? s)
|
|
(apply list-copy s opts))
|
|
(else
|
|
(apply contiguous-sequence->list s opts))))
|
|
|
|
|
|
(define (sequence-fill! s x . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-fill! s x opts))
|
|
((string? s)
|
|
(apply string-fill! s x opts))
|
|
((and (pair? s) (null? opts))
|
|
(apply list-fill! s x opts))
|
|
(else
|
|
(apply contiguous-sequence-fill! s x opts))))
|
|
|
|
|
|
(define (subsequence s start end)
|
|
(cond ((vector? s)
|
|
(subvector s start end))
|
|
((string? s)
|
|
(substring s start end))
|
|
((pair? s)
|
|
(sublist s start end))
|
|
(else (contiguous-subsequence s start end))))
|
|
|
|
|
|
(define (sequence-copy s . opts)
|
|
(cond
|
|
((vector? s)
|
|
(apply vector-copy s opts))
|
|
((string? s)
|
|
(apply string-copy s opts))
|
|
((byte-vector? s)
|
|
(apply contiguous-sequence-copy s opts))
|
|
((pair? s)
|
|
(apply list-copy s opts))
|
|
(else
|
|
(apply contiguous-sequence-copy s opts))))
|
|
|
|
|
|
(define (sequence-append seq . seqs)
|
|
(cond ((vector? seq)
|
|
(apply vector-append seq seqs))
|
|
((string? seq)
|
|
(apply string-append seq seqs))
|
|
((pair? seq)
|
|
(apply append seq seqs))
|
|
(else
|
|
(apply contiguous-sequence-append seq seqs))))
|
|
|
|
|
|
(define (sequence-map proc s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-map proc s opts))
|
|
((string? s)
|
|
(apply string-map proc s opts))
|
|
((and (pair? s) (null? opts))
|
|
(map proc s))
|
|
(else
|
|
(apply contiguous-sequence-map proc s opts))))
|
|
|
|
|
|
(define (sequence-for-each proc s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-for-each proc s opts))
|
|
((string? s)
|
|
(apply string-for-each proc s opts))
|
|
((and (pair? s) (null? opts))
|
|
(for-each proc s))
|
|
(else
|
|
(apply contiguous-sequence-for-each proc s opts))))
|
|
|
|
|
|
(define (sequence-fold kons nil s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-fold kons nil s opts))
|
|
((string? s)
|
|
(apply string-fold kons nil s opts))
|
|
((and (pair? s) (null? opts))
|
|
(fold kons nil s))
|
|
(else
|
|
(apply contiguous-sequence-fold kons nil s opts))))
|
|
|
|
|
|
(define (sequence-fold-right kons nil s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-fold-right kons nil s opts))
|
|
((string? s)
|
|
(apply string-fold-right kons nil s opts))
|
|
((and (pair? s) (null? opts))
|
|
(fold-right kons nil s))
|
|
(else (apply contiguous-sequence-fold-right kons nil s opts))))
|
|
|
|
|
|
(define (sequence-any pred s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-any pred s opts))
|
|
((string? s)
|
|
(apply string-any pred s opts))
|
|
((and (pair? s) (null? opts))
|
|
(any pred s))
|
|
(else (apply contiguous-sequence-any pred s opts))))
|
|
|
|
|
|
(define (sequence-every pred s . opts)
|
|
(cond ((vector? s)
|
|
(apply vector-every pred s opts))
|
|
((string? s)
|
|
(apply string-every pred s opts))
|
|
((and (pair? s) (null? opts))
|
|
(every pred s))
|
|
(else (apply contiguous-sequence-every pred s opts))))
|
|
|
|
|
|
;; The following procedures take or accept >1 sequence argument.
|
|
;; Therefore we don't dispatch on the sequence type so that we
|
|
;; may support mixed sequences: (sequence-append (vector) "abc" '(anton))
|
|
(define sequence-append contiguous-sequence-append)
|
|
(define sequences-map contiguous-sequences-map)
|
|
(define sequences-map/maker contiguous-sequences-map/maker)
|
|
(define sequences-for-each contiguous-sequences-for-each)
|
|
(define sequences-fold contiguous-sequences-fold)
|
|
(define sequences-fold-right contiguous-sequences-fold-right)
|
|
(define sequences-any contiguous-sequences-any)
|
|
(define sequences-every contiguous-sequences-every)
|
|
;; the MAKER parameter works only with general sequences
|
|
(define sequence-copy/maker contiguous-sequence-copy/maker)
|
|
(define sequence-map/maker contiguous-sequence-map/maker)
|