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52 lines
2.2 KiB
Scheme
52 lines
2.2 KiB
Scheme
;;; Extensions to SRFI-4
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;; Copyright (C) 2009 Free Software Foundation, Inc.
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;;
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;; This library is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU Lesser General Public
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;; License as published by the Free Software Foundation; either
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;; version 3 of the License, or (at your option) any later version.
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;;
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;; This library is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; Lesser General Public License for more details.
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;;
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;; You should have received a copy of the GNU Lesser General Public
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;; License along with this library; if not, write to the Free Software
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;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Commentary:
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;; Extensions to SRFI-4. Fully documented in the Guile Reference Manual.
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;;; Code:
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(define-module (srfi srfi-4 gnu)
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#:use-module (srfi srfi-4)
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#:export (;; Somewhat polymorphic conversions.
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any->u8vector any->s8vector any->u16vector any->s16vector
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any->u32vector any->s32vector any->u64vector any->s64vector
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any->f32vector any->f64vector any->c32vector any->c64vector))
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(define-macro (define-any->vector . tags)
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`(begin
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,@(map (lambda (tag)
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`(define (,(symbol-append 'any-> tag 'vector) obj)
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(cond ((,(symbol-append tag 'vector?) obj) obj)
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((pair? obj) (,(symbol-append 'list-> tag 'vector) obj))
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((generalized-vector? obj)
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(let* ((len (generalized-vector-length obj))
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(v (,(symbol-append 'make- tag 'vector) len)))
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(let lp ((i 0))
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(if (< i len)
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(begin
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(,(symbol-append tag 'vector-set!)
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v i (generalized-vector-ref obj i))
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(lp (1+ i)))
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v))))
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(else (scm-error 'wrong-type-arg #f "" '() (list obj))))))
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tags)))
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(define-any->vector u8 s8 u16 s16 u32 s32 u64 s64 f32 f64 c32 c64)
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