;;; Extensions to SRFI-4 ;; Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc. ;; ;; This library is free software; you can redistribute it and/or ;; modify it under the terms of the GNU Lesser General Public ;; License as published by the Free Software Foundation; either ;; version 3 of the License, or (at your option) any later version. ;; ;; This library is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;; Lesser General Public License for more details. ;; ;; You should have received a copy of the GNU Lesser General Public ;; License along with this library; if not, write to the Free Software ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ;;; Commentary: ;; Extensions to SRFI-4. Fully documented in the Guile Reference Manual. ;;; Code: (define-module (srfi srfi-4 gnu) #:use-module (rnrs bytevectors) #:use-module (srfi srfi-4) #:use-module ((srfi srfi-1) #:select (append-map)) #:export (;; Complex numbers with 32- and 64-bit components. c32vector? make-c32vector c32vector c32vector-length c32vector-ref c32vector-set! c32vector->list list->c32vector c64vector? make-c64vector c64vector c64vector-length c64vector-ref c64vector-set! c64vector->list list->c64vector ;; Somewhat polymorphic conversions. any->u8vector any->s8vector any->u16vector any->s16vector any->u32vector any->s32vector any->u64vector any->s64vector any->f32vector any->f64vector any->c32vector any->c64vector ;; copy range u8vector-copy s8vector-copy u16vector-copy s16vector-copy u32vector-copy s32vector-copy u64vector-copy s64vector-copy f32vector-copy f64vector-copy c32vector-copy c64vector-copy ;; copy range with destination u8vector-copy! s8vector-copy! u16vector-copy! s16vector-copy! u32vector-copy! s32vector-copy! u64vector-copy! s64vector-copy! f32vector-copy! f64vector-copy! c32vector-copy! c64vector-copy! ;; from libguile srfi-4-vector-type-size make-srfi-4-vector)) (define make-srfi-4-vector (@@ (srfi srfi-4) make-srfi-4-vector)) (define srfi-4-vector-type-size (@@ (srfi srfi-4) srfi-4-vector-type-size)) (define (bytevector-c32-native-ref v i) (make-rectangular (bytevector-ieee-single-native-ref v i) (bytevector-ieee-single-native-ref v (+ i 4)))) (define (bytevector-c32-native-set! v i x) (bytevector-ieee-single-native-set! v i (real-part x)) (bytevector-ieee-single-native-set! v (+ i 4) (imag-part x))) (define (bytevector-c64-native-ref v i) (make-rectangular (bytevector-ieee-double-native-ref v i) (bytevector-ieee-double-native-ref v (+ i 8)))) (define (bytevector-c64-native-set! v i x) (bytevector-ieee-double-native-set! v i (real-part x)) (bytevector-ieee-double-native-set! v (+ i 8) (imag-part x))) ((@@ (srfi srfi-4) define-bytevector-type) c32 c32-native 8) ((@@ (srfi srfi-4) define-bytevector-type) c64 c64-native 16) (define sizeof-u8 1) (define sizeof-u16 2) (define sizeof-u32 4) (define sizeof-u64 8) (define sizeof-s8 1) (define sizeof-s16 2) (define sizeof-s32 4) (define sizeof-s64 8) (define sizeof-f32 4) (define sizeof-f64 8) (define sizeof-c32 8) (define sizeof-c64 16) (define-macro (type-check v tag) `(unless (,(symbol-append tag 'vector?) ,v) (scm-error 'wrong-type-arg #f ,(format #f "expecting ~a, got ~~A" (symbol-append tag 'vector)) (list ,v) (list ,v)))) (define-macro (define-funs . tags) `(begin ,@(append-map (lambda (tag) (list ; any->xxvector `(define (,(symbol-append 'any-> tag 'vector) obj) (cond ((,(symbol-append tag 'vector?) obj) obj) ((pair? obj) (,(symbol-append 'list-> tag 'vector) obj)) ((and (array? obj) (eqv? 1 (array-rank obj))) (let* ((len (array-length obj)) (v (,(symbol-append 'make- tag 'vector) len))) (let lp ((i 0)) (if (< i len) (begin (,(symbol-append tag 'vector-set!) v i (array-ref obj i)) (lp (1+ i))) v)))) (else (scm-error 'wrong-type-arg #f "" '() (list obj))))) ; xxvector-copy! `(define* (,(symbol-append tag 'vector '-copy!) dst at src #:optional (start 0) end) ,(format #f "Copy a block of elements from @var{src} to @var{dst}, both of which must be ~as, starting in @var{dst} at @var{at} and starting in @var{src} at @var{start} and ending at @var{end}. It is an error for @var{dst} to have a length less than @var{at} + (@var{end} - @var{start}). @var{at} and @var{start} default to 0 and @var{end} defaults to the length of @var{src}. If source and destination overlap, copying takes place as if the source is first copied into a temporary vector and then into the destination." (symbol-append tag 'vector)) (type-check src ,tag) (type-check dst ,tag) (let ((sof ,(symbol-append 'sizeof- tag)) (len (- (or end (,(symbol-append tag 'vector-length) src)) start))) (bytevector-copy! src (* start sof) dst (* at sof) (* len sof)))) ; xxvector-copy `(define* (,(symbol-append tag 'vector '-copy) src #:optional (start 0) end) ,(format #f "Returns a freshly allocated ~a containing the elements of ~a @var{src} between @var{start} and @var{end}. @var{start} defaults to 0 and @var{end} defaults to the length of @var{src}." (symbol-append tag 'vector) (symbol-append tag 'vector)) (type-check src ,tag) (let* ((sof ,(symbol-append 'sizeof- tag)) (len (- (or end (,(symbol-append tag 'vector-length) src)) start)) (dst (,(symbol-append 'make- tag 'vector) len))) (bytevector-copy! src (* start sof) dst 0 (* len sof)) dst)) )) tags))) (define-funs u8 s8 u16 s16 u32 s32 u64 s64 f32 f64 c32 c64)