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Changes to html_node/Character-Encoding.html
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From: |
Jim Meyering |
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Subject: |
Changes to html_node/Character-Encoding.html |
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Date: |
Sun, 27 Sep 2020 23:36:54 -0400 (EDT) |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 20/09/27 23:36:49
Index: html_node/Character-Encoding.html
===================================================================
RCS file: html_node/Character-Encoding.html
diff -N html_node/Character-Encoding.html
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ html_node/Character-Encoding.html 28 Sep 2020 03:36:49 -0000 1.1
@@ -0,0 +1,100 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd";>
+<html>
+<!-- This manual is for grep, a pattern matching engine.
+
+Copyright (C) 1999-2002, 2005, 2008-2020 Free Software Foundation,
+Inc.
+
+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, with no Front-Cover Texts, and with no Back-Cover
+Texts. A copy of the license is included in the section entitled
+"GNU Free Documentation License". -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Character Encoding (GNU Grep 3.5)</title>
+
+<meta name="description" content="Character Encoding (GNU Grep 3.5)">
+<meta name="keywords" content="Character Encoding (GNU Grep 3.5)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Regular-Expressions.html#Regular-Expressions" rel="up"
title="Regular Expressions">
+<link href="Matching-Non_002dASCII.html#Matching-Non_002dASCII" rel="next"
title="Matching Non-ASCII">
+<link href="Basic-vs-Extended.html#Basic-vs-Extended" rel="prev" title="Basic
vs Extended">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="/software/gnulib/manual.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Character-Encoding"></a>
+<div class="header">
+<p>
+Next: <a href="Matching-Non_002dASCII.html#Matching-Non_002dASCII"
accesskey="n" rel="next">Matching Non-ASCII</a>, Previous: <a
href="Basic-vs-Extended.html#Basic-vs-Extended" accesskey="p" rel="prev">Basic
vs Extended</a>, Up: <a href="Regular-Expressions.html#Regular-Expressions"
accesskey="u" rel="up">Regular Expressions</a> [<a
href="index.html#SEC_Contents" title="Table of contents"
rel="contents">Contents</a>][<a href="Index.html#Index" title="Index"
rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Character-Encoding-1"></a>
+<h3 class="section">3.7 Character Encoding</h3>
+<a name="index-character-encoding"></a>
+
+<p>The <code>LC_CTYPE</code> locale specifies the encoding of characters in
+patterns and data, that is, whether text is encoded in UTF-8, ASCII,
+or some other encoding. See <a
href="Environment-Variables.html#Environment-Variables">Environment
Variables</a>.
+</p>
+<p>In the ‘<samp>C</samp>’ or ‘<samp>POSIX</samp>’
locale, every character is encoded as
+a single byte and every byte is a valid character. In more-complex
+encodings such as UTF-8, a sequence of multiple bytes may be needed to
+represent a character, and some bytes may be encoding errors that do
+not contribute to the representation of any character. POSIX does not
+specify the behavior of <code>grep</code> when patterns or input data
+contain encoding errors or null characters, so portable scripts should
+avoid such usage. As an extension to POSIX, GNU <code>grep</code> treats
+null characters like any other character. However, unless the
+<samp>-a</samp> (<samp>--binary-files=text</samp>) option is used, the
+presence of null characters in input or of encoding errors in output
+causes GNU <code>grep</code> to treat the file as binary and suppress
+details about matches. See <a
href="File-and-Directory-Selection.html#File-and-Directory-Selection">File and
Directory Selection</a>.
+</p>
+<p>Regardless of locale, the 103 characters in the POSIX Portable
+Character Set (a subset of ASCII) are always encoded as a single byte,
+and the 128 ASCII characters have their usual single-byte encodings on
+all but oddball platforms.
+</p>
+
+
+
+</body>
+</html>
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