srfi/srfi-4.scm

   1 ;;;; srfi-4.scm --- Homogeneous numeric vector datatypes.
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  43
  44 ;;; Commentary:
  45
  46 ;;; This module implements homogeneous numeric vectors as defined in SRFI-4.
  47
  48 ;;; Code:
  49
  50 ;;; Author: Martin Grabmueller <mgrabmue@cs.tu-berlin.de>
  51
  52 (define-module (srfi srfi-4))
  53
  54 (export
  55 ;;; Unsigned 8-bit vectors.
  56  u8vector? make-u8vector u8vector u8vector-length u8vector-ref
  57  u8vector-set! u8vector->list list->u8vector
  58
  59 ;;; Signed 8-bit vectors.
  60  s8vector? make-s8vector s8vector s8vector-length s8vector-ref
  61  s8vector-set! s8vector->list list->s8vector
  62
  63 ;;; Unsigned 16-bit vectors.
  64  u16vector? make-u16vector u16vector u16vector-length u16vector-ref
  65  u16vector-set! u16vector->list list->u16vector
  66
  67 ;;; Signed 16-bit vectors.
  68  s16vector? make-s16vector s16vector s16vector-length s16vector-ref
  69  s16vector-set! s16vector->list list->s16vector
  70
  71 ;;; Unsigned 32-bit vectors.
  72  u32vector? make-u32vector u32vector u32vector-length u32vector-ref
  73  u32vector-set! u32vector->list list->u32vector
  74
  75 ;;; Signed 32-bit vectors.
  76  s32vector? make-s32vector s32vector s32vector-length s32vector-ref
  77  s32vector-set! s32vector->list list->s32vector
  78
  79 ;;; Unsigned 64-bit vectors.
  80  u64vector? make-u64vector u64vector u64vector-length u64vector-ref
  81  u64vector-set! u64vector->list list->u64vector
  82
  83 ;;; Signed 64-bit vectors.
  84  s64vector? make-s64vector s64vector s64vector-length s64vector-ref
  85  s64vector-set! s64vector->list list->s64vector
  86
  87 ;;; 32-bit floating point vectors.
  88  f32vector? make-f32vector f32vector f32vector-length f32vector-ref
  89  f32vector-set! f32vector->list list->f32vector
  90
  91 ;;; 64-bit floating point vectors.
  92  f64vector? make-f64vector f64vector f64vector-length f64vector-ref
  93  f64vector-set! f64vector->list list->f64vector
  94  )
  95
  96
  97 ;; Make 'srfi-4 available as a feature identifiere to `cond-expand'.
  98 ;;
  99 (cond-expand-provide (current-module) '(srfi-4))
 100
 101
 102 ;; Load the compiled primitives from the shared library.
 103 ;;
 104 (load-extension "libguile-srfi-srfi-4" "scm_init_srfi_4")
 105
 106
 107 ;; Reader extension for #f32() and #f64() vectors.
 108 ;;
 109 (define (hash-f char port)
 110   (if (or (char=? (peek-char port) #\3)
 111           (char=? (peek-char port) #\6))
 112     (let* ((obj (read port)))
 113       (if (number? obj)
 114         (cond ((= obj 32)
 115                (let ((l (read port)))
 116                  (if (list? l)
 117                    (list->f32vector l)
 118                    (error "syntax error in #f32() vector literal"))))
 119               ((= obj 64)
 120                (let ((l (read port)))
 121                  (if (list? l)
 122                    (list->f64vector l)
 123                    (error "syntax error in #f64() vector literal"))))
 124               (else
 125                (error "syntax error in #f...() vector literal")))
 126         (error "syntax error in #f...() vector literal")))
 127     #f))
 128
 129
 130 ;; Reader extension for #u8(), #u16(), #u32() and #u64() vectors.
 131 ;;
 132 (define (hash-u char port)
 133   (if (or (char=? (peek-char port) #\8)
 134           (char=? (peek-char port) #\1)
 135           (char=? (peek-char port) #\3)
 136           (char=? (peek-char port) #\6))
 137     (let ((obj (read port)))
 138       (cond ((= obj 8)
 139                (let ((l (read port)))
 140                  (if (list? l)
 141                    (list->u8vector l)
 142                    (error "syntax error in #u8() vector literal"))))
 143             ((= obj 16)
 144                (let ((l (read port)))
 145                  (if (list? l)
 146                    (list->u16vector l)
 147                    (error "syntax error in #u16() vector literal"))))
 148             ((= obj 32)
 149                (let ((l (read port)))
 150                  (if (list? l)
 151                    (list->u32vector l)
 152                    (error "syntax error in #u32() vector literal"))))
 153             ((= obj 64)
 154                (let ((l (read port)))
 155                  (if (list? l)
 156                    (list->u64vector l)
 157                    (error "syntax error in #u64() vector literal"))))
 158             (else
 159              (error "syntax error in #u...() vector literal"))))
 160     (error "syntax error in #u...() vector literal")))
 161
 162
 163 ;; Reader extension for #s8(), #s16(), #s32() and #s64() vectors.
 164 ;;
 165 (define (hash-s char port)
 166   (if (or (char=? (peek-char port) #\8)
 167           (char=? (peek-char port) #\1)
 168           (char=? (peek-char port) #\3)
 169           (char=? (peek-char port) #\6))
 170     (let ((obj (read port)))
 171       (cond ((= obj 8)
 172                (let ((l (read port)))
 173                  (if (list? l)
 174                    (list->s8vector l)
 175                    (error "syntax error in #s8() vector literal"))))
 176             ((= obj 16)
 177                (let ((l (read port)))
 178                  (if (list? l)
 179                    (list->s16vector l)
 180                    (error "syntax error in #s16() vector literal"))))
 181             ((= obj 32)
 182                (let ((l (read port)))
 183                  (if (list? l)
 184                    (list->s32vector l)
 185                    (error "syntax error in #s32() vector literal"))))
 186             ((= obj 64)
 187                (let ((l (read port)))
 188                  (if (list? l)
 189                    (list->s64vector l)
 190                    (error "syntax error in #s64() vector literal"))))
 191             (else
 192              (error "syntax error in #s...() vector literal"))))
 193     (error "syntax error in #s...() vector literal")))
 194
 195
 196 ;; Install the hash extensions.
 197 ;;
 198 (read-hash-extend #\f hash-f)
 199 (read-hash-extend #\u hash-u)
 200 (read-hash-extend #\s hash-s)