131 lines
9 KiB
HTML
131 lines
9 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<!-- This manual documents Guile version 3.0.10.
|
|
|
|
Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
|
|
Inc.
|
|
|
|
Copyright (C) 2021 Maxime Devos
|
|
|
|
Copyright (C) 2024 Tomas Volf
|
|
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with no
|
|
Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
|
|
copy of the license is included in the section entitled "GNU Free
|
|
Documentation License." -->
|
|
<title>String Modification (Guile Reference Manual)</title>
|
|
|
|
<meta name="description" content="String Modification (Guile Reference Manual)">
|
|
<meta name="keywords" content="String Modification (Guile Reference Manual)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content=".texi2any-real">
|
|
<meta name="viewport" content="width=device-width,initial-scale=1">
|
|
|
|
<link href="index.html" rel="start" title="Top">
|
|
<link href="Concept-Index.html" rel="index" title="Concept Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Strings.html" rel="up" title="Strings">
|
|
<link href="String-Comparison.html" rel="next" title="String Comparison">
|
|
<link href="String-Selection.html" rel="prev" title="String Selection">
|
|
<style type="text/css">
|
|
<!--
|
|
a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
|
|
div.example {margin-left: 3.2em}
|
|
span:hover a.copiable-link {visibility: visible}
|
|
strong.def-name {font-family: monospace; font-weight: bold; font-size: larger}
|
|
-->
|
|
</style>
|
|
<link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css">
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<div class="subsubsection-level-extent" id="String-Modification">
|
|
<div class="nav-panel">
|
|
<p>
|
|
Next: <a href="String-Comparison.html" accesskey="n" rel="next">String Comparison</a>, Previous: <a href="String-Selection.html" accesskey="p" rel="prev">String Selection</a>, Up: <a href="Strings.html" accesskey="u" rel="up">Strings</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>
|
|
</div>
|
|
<hr>
|
|
<h4 class="subsubsection" id="String-Modification-1"><span>6.6.5.6 String Modification<a class="copiable-link" href="#String-Modification-1"> ¶</a></span></h4>
|
|
|
|
<p>These procedures are for modifying strings in-place. This means that the
|
|
result of the operation is not a new string; instead, the original string’s
|
|
memory representation is modified.
|
|
</p>
|
|
<a class="index-entry-id" id="index-string_002dset_0021-2"></a>
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dset_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-set!</strong> <var class="def-var-arguments">str k chr</var><a class="copiable-link" href="#index-string_002dset_0021"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fset_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_set_x</strong> <var class="def-var-arguments">(str, k, chr)</var><a class="copiable-link" href="#index-scm_005fstring_005fset_005fx"> ¶</a></span></dt>
|
|
<dd><p>Store <var class="var">chr</var> in element <var class="var">k</var> of <var class="var">str</var> and return
|
|
an unspecified value. <var class="var">k</var> must be a valid index of
|
|
<var class="var">str</var>.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deftypefn">
|
|
<dt class="deftypefn" id="index-scm_005fc_005fstring_005fset_005fx"><span class="category-def">C Function: </span><span><code class="def-type">void</code> <strong class="def-name">scm_c_string_set_x</strong> <code class="def-code-arguments">(SCM str, size_t k, SCM chr)</code><a class="copiable-link" href="#index-scm_005fc_005fstring_005fset_005fx"> ¶</a></span></dt>
|
|
<dd><p>Like <code class="code">scm_string_set_x</code>, but the index is given as a <code class="code">size_t</code>.
|
|
</p></dd></dl>
|
|
|
|
<a class="index-entry-id" id="index-string_002dfill_0021-1"></a>
|
|
<a class="anchor" id="x_002dstring_002dfill_0021"></a><dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dfill_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-fill!</strong> <var class="def-var-arguments">str chr [start [end]]</var><a class="copiable-link" href="#index-string_002dfill_0021"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fsubstring_005ffill_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_substring_fill_x</strong> <var class="def-var-arguments">(str, chr, start, end)</var><a class="copiable-link" href="#index-scm_005fsubstring_005ffill_005fx"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005ffill_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_fill_x</strong> <var class="def-var-arguments">(str, chr)</var><a class="copiable-link" href="#index-scm_005fstring_005ffill_005fx"> ¶</a></span></dt>
|
|
<dd><p>Stores <var class="var">chr</var> in every element of the given <var class="var">str</var> and
|
|
returns an unspecified value.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-substring_002dfill_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">substring-fill!</strong> <var class="def-var-arguments">str start end fill</var><a class="copiable-link" href="#index-substring_002dfill_0021"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fsubstring_005ffill_005fx-1"><span class="category-def">C Function: </span><span><strong class="def-name">scm_substring_fill_x</strong> <var class="def-var-arguments">(str, start, end, fill)</var><a class="copiable-link" href="#index-scm_005fsubstring_005ffill_005fx-1"> ¶</a></span></dt>
|
|
<dd><p>Change every character in <var class="var">str</var> between <var class="var">start</var> and
|
|
<var class="var">end</var> to <var class="var">fill</var>.
|
|
</p>
|
|
<div class="example lisp">
|
|
<pre class="lisp-preformatted">(define y (string-copy "abcdefg"))
|
|
(substring-fill! y 1 3 #\r)
|
|
y
|
|
⇒ "arrdefg"
|
|
</pre></div>
|
|
</dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-substring_002dmove_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">substring-move!</strong> <var class="def-var-arguments">str1 start1 end1 str2 start2</var><a class="copiable-link" href="#index-substring_002dmove_0021"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fsubstring_005fmove_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_substring_move_x</strong> <var class="def-var-arguments">(str1, start1, end1, str2, start2)</var><a class="copiable-link" href="#index-scm_005fsubstring_005fmove_005fx"> ¶</a></span></dt>
|
|
<dd><p>Copy the substring of <var class="var">str1</var> bounded by <var class="var">start1</var> and <var class="var">end1</var>
|
|
into <var class="var">str2</var> beginning at position <var class="var">start2</var>.
|
|
<var class="var">str1</var> and <var class="var">str2</var> can be the same string.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dcopy_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-copy!</strong> <var class="def-var-arguments">target tstart s [start [end]]</var><a class="copiable-link" href="#index-string_002dcopy_0021"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fcopy_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_copy_x</strong> <var class="def-var-arguments">(target, tstart, s, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005fcopy_005fx"> ¶</a></span></dt>
|
|
<dd><p>Copy the sequence of characters from index range [<var class="var">start</var>,
|
|
<var class="var">end</var>) in string <var class="var">s</var> to string <var class="var">target</var>, beginning
|
|
at index <var class="var">tstart</var>. The characters are copied left-to-right
|
|
or right-to-left as needed – the copy is guaranteed to work,
|
|
even if <var class="var">target</var> and <var class="var">s</var> are the same string. It is an
|
|
error if the copy operation runs off the end of the target
|
|
string.
|
|
</p></dd></dl>
|
|
|
|
|
|
</div>
|
|
<hr>
|
|
<div class="nav-panel">
|
|
<p>
|
|
Next: <a href="String-Comparison.html">String Comparison</a>, Previous: <a href="String-Selection.html">String Selection</a>, Up: <a href="Strings.html">Strings</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>
|
|
</div>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|