90 lines
3.3 KiB
HTML
90 lines
3.3 KiB
HTML
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<!DOCTYPE html>
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<html>
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<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
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copy of the license is included in the section entitled "GNU Free
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Documentation License." -->
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<title>Bytevectors as Arrays (Guile Reference Manual)</title>
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<meta name="description" content="Bytevectors as Arrays (Guile Reference Manual)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Bytevectors.html" rel="up" title="Bytevectors">
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<link href="Bytevectors-as-Uniform-Vectors.html" rel="next" title="Bytevectors as Uniform Vectors">
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<link href="Bytevectors-as-Strings.html" rel="prev" title="Bytevectors as Strings">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="Bytevectors-as-Arrays">
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<div class="nav-panel">
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<p>
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Next: <a href="Bytevectors-as-Uniform-Vectors.html" accesskey="n" rel="next">Accessing Bytevectors with the SRFI-4 API</a>, Previous: <a href="Bytevectors-as-Strings.html" accesskey="p" rel="prev">Interpreting Bytevector Contents as Unicode Strings</a>, Up: <a href="Bytevectors.html" accesskey="u" rel="up">Bytevectors</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<h4 class="subsubsection" id="Accessing-Bytevectors-with-the-Array-API"><span>6.6.12.7 Accessing Bytevectors with the Array API<a class="copiable-link" href="#Accessing-Bytevectors-with-the-Array-API"> ¶</a></span></h4>
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<p>As an extension to the R6RS, Guile allows bytevectors to be manipulated
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with the <em class="dfn">array</em> procedures (see <a class="pxref" href="Arrays.html">Arrays</a>). When using these
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APIs, bytes are accessed one at a time as 8-bit unsigned integers:
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</p>
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<div class="example">
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<pre class="example-preformatted">(define bv #vu8(0 1 2 3))
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(array? bv)
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⇒ #t
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(array-rank bv)
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⇒ 1
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(array-ref bv 2)
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⇒ 2
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;; Note the different argument order on array-set!.
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(array-set! bv 77 2)
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(array-ref bv 2)
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⇒ 77
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(array-type bv)
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⇒ vu8
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</pre></div>
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</div>
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</body>
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</html>
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