;;; 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) #: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 make-srfi-4-vector ;; 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)) (define make-srfi-4-vector (@@ (srfi srfi-4) make-srfi-4-vector)) (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-macro (define-any->vector . tags) `(begin ,@(map (lambda (tag) `(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)))))) tags))) (define-any->vector u8 s8 u16 s16 u32 s32 u64 s64 f32 f64 c32 c64)