121 lines
8.9 KiB
HTML
121 lines
8.9 KiB
HTML
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<!DOCTYPE html>
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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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<title>Bytevectors and Integer Lists (Guile Reference Manual)</title>
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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-Floats.html" rel="next" title="Bytevectors as Floats">
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<link href="Bytevectors-as-Integers.html" rel="prev" title="Bytevectors as Integers">
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<link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="Bytevectors-and-Integer-Lists">
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<div class="nav-panel">
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<p>
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Next: <a href="Bytevectors-as-Floats.html" accesskey="n" rel="next">Interpreting Bytevector Contents as Floating Point Numbers</a>, Previous: <a href="Bytevectors-as-Integers.html" accesskey="p" rel="prev">Interpreting Bytevector Contents as Integers</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="Converting-Bytevectors-to_002ffrom-Integer-Lists"><span>6.6.12.4 Converting Bytevectors to/from Integer Lists<a class="copiable-link" href="#Converting-Bytevectors-to_002ffrom-Integer-Lists"> ¶</a></span></h4>
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<p>Bytevector contents can readily be converted to/from lists of signed or
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unsigned integers:
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</p>
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<div class="example lisp">
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<pre class="lisp-preformatted">(bytevector->sint-list (u8-list->bytevector (make-list 4 255))
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(endianness little) 2)
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⇒ (-1 -1)
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</pre></div>
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<dl class="first-deffn">
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<dt class="deffn" id="index-bytevector_002d_003eu8_002dlist"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">bytevector->u8-list</strong> <var class="def-var-arguments">bv</var><a class="copiable-link" href="#index-bytevector_002d_003eu8_002dlist"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fbytevector_005fto_005fu8_005flist"><span class="category-def">C Function: </span><span><strong class="def-name">scm_bytevector_to_u8_list</strong> <var class="def-var-arguments">(bv)</var><a class="copiable-link" href="#index-scm_005fbytevector_005fto_005fu8_005flist"> ¶</a></span></dt>
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<dd><p>Return a newly allocated list of unsigned 8-bit integers from the
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contents of <var class="var">bv</var>.
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</p></dd></dl>
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<a class="anchor" id="x_002du8_002dlist_002d_003ebytevector"></a><dl class="first-deffn">
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<dt class="deffn" id="index-u8_002dlist_002d_003ebytevector"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">u8-list->bytevector</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-u8_002dlist_002d_003ebytevector"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fu8_005flist_005fto_005fbytevector"><span class="category-def">C Function: </span><span><strong class="def-name">scm_u8_list_to_bytevector</strong> <var class="def-var-arguments">(lst)</var><a class="copiable-link" href="#index-scm_005fu8_005flist_005fto_005fbytevector"> ¶</a></span></dt>
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<dd><p>Return a newly allocated bytevector consisting of the unsigned 8-bit
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integers listed in <var class="var">lst</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-bytevector_002d_003euint_002dlist"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">bytevector->uint-list</strong> <var class="def-var-arguments">bv endianness size</var><a class="copiable-link" href="#index-bytevector_002d_003euint_002dlist"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fbytevector_005fto_005fuint_005flist"><span class="category-def">C Function: </span><span><strong class="def-name">scm_bytevector_to_uint_list</strong> <var class="def-var-arguments">(bv, endianness, size)</var><a class="copiable-link" href="#index-scm_005fbytevector_005fto_005fuint_005flist"> ¶</a></span></dt>
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<dd><p>Return a list of unsigned integers of <var class="var">size</var> bytes representing the
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contents of <var class="var">bv</var>, decoded according to <var class="var">endianness</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-bytevector_002d_003esint_002dlist"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">bytevector->sint-list</strong> <var class="def-var-arguments">bv endianness size</var><a class="copiable-link" href="#index-bytevector_002d_003esint_002dlist"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fbytevector_005fto_005fsint_005flist"><span class="category-def">C Function: </span><span><strong class="def-name">scm_bytevector_to_sint_list</strong> <var class="def-var-arguments">(bv, endianness, size)</var><a class="copiable-link" href="#index-scm_005fbytevector_005fto_005fsint_005flist"> ¶</a></span></dt>
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<dd><p>Return a list of signed integers of <var class="var">size</var> bytes representing the
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contents of <var class="var">bv</var>, decoded according to <var class="var">endianness</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-uint_002dlist_002d_003ebytevector"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">uint-list->bytevector</strong> <var class="def-var-arguments">lst endianness size</var><a class="copiable-link" href="#index-uint_002dlist_002d_003ebytevector"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fuint_005flist_005fto_005fbytevector"><span class="category-def">C Function: </span><span><strong class="def-name">scm_uint_list_to_bytevector</strong> <var class="def-var-arguments">(lst, endianness, size)</var><a class="copiable-link" href="#index-scm_005fuint_005flist_005fto_005fbytevector"> ¶</a></span></dt>
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<dd><p>Return a new bytevector containing the unsigned integers listed in
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<var class="var">lst</var> and encoded on <var class="var">size</var> bytes according to <var class="var">endianness</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-sint_002dlist_002d_003ebytevector"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">sint-list->bytevector</strong> <var class="def-var-arguments">lst endianness size</var><a class="copiable-link" href="#index-sint_002dlist_002d_003ebytevector"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fsint_005flist_005fto_005fbytevector"><span class="category-def">C Function: </span><span><strong class="def-name">scm_sint_list_to_bytevector</strong> <var class="def-var-arguments">(lst, endianness, size)</var><a class="copiable-link" href="#index-scm_005fsint_005flist_005fto_005fbytevector"> ¶</a></span></dt>
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<dd><p>Return a new bytevector containing the signed integers listed in
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<var class="var">lst</var> and encoded on <var class="var">size</var> bytes according to <var class="var">endianness</var>.
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</p></dd></dl>
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</div>
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<hr>
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<div class="nav-panel">
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<p>
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Next: <a href="Bytevectors-as-Floats.html">Interpreting Bytevector Contents as Floating Point Numbers</a>, Previous: <a href="Bytevectors-as-Integers.html">Interpreting Bytevector Contents as Integers</a>, Up: <a href="Bytevectors.html">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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</body>
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</html>
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