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Diffstat (limited to 'srfi/srfi-4.scm')
-rw-r--r-- | srfi/srfi-4.scm | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/srfi/srfi-4.scm b/srfi/srfi-4.scm new file mode 100644 index 000000000..ea7137cd1 --- /dev/null +++ b/srfi/srfi-4.scm @@ -0,0 +1,200 @@ +;;;; srfi-4.scm --- Homogeneous numeric vector datatypes. +;;;; +;;;; Copyright (C) 2001 Free Software Foundation, Inc. +;;;; +;;;; This program is free software; you can redistribute it and/or +;;;; modify it under the terms of the GNU General Public License as +;;;; published by the Free Software Foundation; either version 2, or +;;;; (at your option) any later version. +;;;; +;;;; This program 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 +;;;; General Public License for more details. +;;;; +;;;; You should have received a copy of the GNU General Public License +;;;; along with this software; see the file COPYING. If not, write to +;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330, +;;;; Boston, MA 02111-1307 USA +;;;; +;;;; As a special exception, the Free Software Foundation gives permission +;;;; for additional uses of the text contained in its release of GUILE. +;;;; +;;;; The exception is that, if you link the GUILE library with other files +;;;; to produce an executable, this does not by itself cause the +;;;; resulting executable to be covered by the GNU General Public License. +;;;; Your use of that executable is in no way restricted on account of +;;;; linking the GUILE library code into it. +;;;; +;;;; This exception does not however invalidate any other reasons why +;;;; the executable file might be covered by the GNU General Public License. +;;;; +;;;; This exception applies only to the code released by the +;;;; Free Software Foundation under the name GUILE. If you copy +;;;; code from other Free Software Foundation releases into a copy of +;;;; GUILE, as the General Public License permits, the exception does +;;;; not apply to the code that you add in this way. To avoid misleading +;;;; anyone as to the status of such modified files, you must delete +;;;; this exception notice from them. +;;;; +;;;; If you write modifications of your own for GUILE, it is your choice +;;;; whether to permit this exception to apply to your modifications. +;;;; If you do not wish that, delete this exception notice. + +;;; Commentary: + +;;; This module implements homogeneous numeric vectors as defined in SRFI-4. + +;;; Code: + +;;; Author: Martin Grabmueller <mgrabmue@cs.tu-berlin.de> + +(define-module (srfi srfi-4)) + +(export +;;; Unsigned 8-bit vectors. + u8vector? make-u8vector u8vector u8vector-length u8vector-ref + u8vector-set! u8vector->list list->u8vector + +;;; Signed 8-bit vectors. + s8vector? make-s8vector s8vector s8vector-length s8vector-ref + s8vector-set! s8vector->list list->s8vector + +;;; Unsigned 16-bit vectors. + u16vector? make-u16vector u16vector u16vector-length u16vector-ref + u16vector-set! u16vector->list list->u16vector + +;;; Signed 16-bit vectors. + s16vector? make-s16vector s16vector s16vector-length s16vector-ref + s16vector-set! s16vector->list list->s16vector + +;;; Unsigned 32-bit vectors. + u32vector? make-u32vector u32vector u32vector-length u32vector-ref + u32vector-set! u32vector->list list->u32vector + +;;; Signed 32-bit vectors. + s32vector? make-s32vector s32vector s32vector-length s32vector-ref + s32vector-set! s32vector->list list->s32vector + +;;; Unsigned 64-bit vectors. + u64vector? make-u64vector u64vector u64vector-length u64vector-ref + u64vector-set! u64vector->list list->u64vector + +;;; Signed 64-bit vectors. + s64vector? make-s64vector s64vector s64vector-length s64vector-ref + s64vector-set! s64vector->list list->s64vector + +;;; 32-bit floating point vectors. + f32vector? make-f32vector f32vector f32vector-length f32vector-ref + f32vector-set! f32vector->list list->f32vector + +;;; 64-bit floating point vectors. + f64vector? make-f64vector f64vector f64vector-length f64vector-ref + f64vector-set! f64vector->list list->f64vector + ) + + +;; Make 'srfi-4 available as a feature identifiere to `cond-expand'. +;; +(cond-expand-provide (current-module) '(srfi-4)) + + +;; Load the compiled primitives from the shared library. +;; +(load-extension "libguile-srfi-srfi-4" "scm_init_srfi_4") + + +;; Reader extension for #f32() and #f64() vectors. +;; +(define (hash-f char port) + (if (or (char=? (peek-char port) #\3) + (char=? (peek-char port) #\6)) + (let* ((obj (read port))) + (if (number? obj) + (cond ((= obj 32) + (let ((l (read port))) + (if (list? l) + (list->f32vector l) + (error "syntax error in #f32() vector literal")))) + ((= obj 64) + (let ((l (read port))) + (if (list? l) + (list->f64vector l) + (error "syntax error in #f64() vector literal")))) + (else + (error "syntax error in #f...() vector literal"))) + (error "syntax error in #f...() vector literal"))) + #f)) + + +;; Reader extension for #u8(), #u16(), #u32() and #u64() vectors. +;; +(define (hash-u char port) + (if (or (char=? (peek-char port) #\8) + (char=? (peek-char port) #\1) + (char=? (peek-char port) #\3) + (char=? (peek-char port) #\6)) + (let ((obj (read port))) + (cond ((= obj 8) + (let ((l (read port))) + (if (list? l) + (list->u8vector l) + (error "syntax error in #u8() vector literal")))) + ((= obj 16) + (let ((l (read port))) + (if (list? l) + (list->u16vector l) + (error "syntax error in #u16() vector literal")))) + ((= obj 32) + (let ((l (read port))) + (if (list? l) + (list->u32vector l) + (error "syntax error in #u32() vector literal")))) + ((= obj 64) + (let ((l (read port))) + (if (list? l) + (list->u64vector l) + (error "syntax error in #u64() vector literal")))) + (else + (error "syntax error in #u...() vector literal")))) + (error "syntax error in #u...() vector literal"))) + + +;; Reader extension for #s8(), #s16(), #s32() and #s64() vectors. +;; +(define (hash-s char port) + (if (or (char=? (peek-char port) #\8) + (char=? (peek-char port) #\1) + (char=? (peek-char port) #\3) + (char=? (peek-char port) #\6)) + (let ((obj (read port))) + (cond ((= obj 8) + (let ((l (read port))) + (if (list? l) + (list->s8vector l) + (error "syntax error in #s8() vector literal")))) + ((= obj 16) + (let ((l (read port))) + (if (list? l) + (list->s16vector l) + (error "syntax error in #s16() vector literal")))) + ((= obj 32) + (let ((l (read port))) + (if (list? l) + (list->s32vector l) + (error "syntax error in #s32() vector literal")))) + ((= obj 64) + (let ((l (read port))) + (if (list? l) + (list->s64vector l) + (error "syntax error in #s64() vector literal")))) + (else + (error "syntax error in #s...() vector literal")))) + (error "syntax error in #s...() vector literal"))) + + +;; Install the hash extensions. +;; +(read-hash-extend #\f hash-f) +(read-hash-extend #\u hash-u) +(read-hash-extend #\s hash-s) |