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glib-Glob-style-pattern-matching.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Glob-style pattern matching: GLib Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GLib Reference Manual"> <link rel="up" href="glib-utilities.html" title="GLib Utilities"> <link rel="prev" href="glib-Commandline-option-parser.html" title="Commandline option parser"> <link rel="next" href="glib-Perl-compatible-regular-expressions.html" title="Perl-compatible regular expressions"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#glib-Glob-style-pattern-matching.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="glib-utilities.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="glib-Commandline-option-parser.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="glib-Perl-compatible-regular-expressions.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="glib-Glob-style-pattern-matching"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="glib-Glob-style-pattern-matching.top_of_page"></a>Glob-style pattern matching</span></h2> <p>Glob-style pattern matching — matches strings against patterns containing '*' (wildcard) and '?' (joker)</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="function_type"> <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="returnvalue">GPatternSpec</span></a> * </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-spec-new" title="g_pattern_spec_new ()">g_pattern_spec_new</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">void</span> </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-spec-free" title="g_pattern_spec_free ()">g_pattern_spec_free</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-spec-equal" title="g_pattern_spec_equal ()">g_pattern_spec_equal</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match" title="g_pattern_match ()">g_pattern_match</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match-string" title="g_pattern_match_string ()">g_pattern_match_string</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match-simple" title="g_pattern_match_simple ()">g_pattern_match_simple</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody><tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec">GPatternSpec</a></td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <glib.h> </pre> </div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.description"></a><h2>Description</h2> <p>The g_pattern_match* functions match a string against a pattern containing '*' and '?' wildcards with similar semantics as the standard <code class="function">glob()</code> function: '*' matches an arbitrary, possibly empty, string, '?' matches an arbitrary character.</p> <p>Note that in contrast to <code class="function">glob()</code>, the '/' character can be matched by the wildcards, there are no '[...]' character ranges and '*' and '?' can not be escaped to include them literally in a pattern.</p> <p>When multiple strings must be matched against the same pattern, it is better to compile the pattern to a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> using <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-spec-new" title="g_pattern_spec_new ()"><code class="function">g_pattern_spec_new()</code></a> and use <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match-string" title="g_pattern_match_string ()"><code class="function">g_pattern_match_string()</code></a> instead of <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match-simple" title="g_pattern_match_simple ()"><code class="function">g_pattern_match_simple()</code></a>. This avoids the overhead of repeated pattern compilation.</p> </div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="g-pattern-spec-new"></a><h3>g_pattern_spec_new ()</h3> <pre class="programlisting"><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="returnvalue">GPatternSpec</span></a> * g_pattern_spec_new (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *pattern</code></em>);</pre> <p>Compiles a pattern to a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a>.</p> <div class="refsect3"> <a name="g-pattern-spec-new.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>pattern</p></td> <td class="parameter_description"><p>a zero-terminated UTF-8 encoded string</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-pattern-spec-new.returns"></a><h4>Returns</h4> <p> a newly-allocated <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p> </div> </div> <hr> <div class="refsect2"> <a name="g-pattern-spec-free"></a><h3>g_pattern_spec_free ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> g_pattern_spec_free (<em class="parameter"><code><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> *pspec</code></em>);</pre> <p>Frees the memory allocated for the <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a>.</p> <div class="refsect3"> <a name="g-pattern-spec-free.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>pspec</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="g-pattern-spec-equal"></a><h3>g_pattern_spec_equal ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> g_pattern_spec_equal (<em class="parameter"><code><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> *pspec1</code></em>, <em class="parameter"><code><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> *pspec2</code></em>);</pre> <p>Compares two compiled pattern specs and returns whether they will match the same set of strings.</p> <div class="refsect3"> <a name="g-pattern-spec-equal.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>pspec1</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pspec2</p></td> <td class="parameter_description"><p>another <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="g-pattern-spec-equal.returns"></a><h4>Returns</h4> <p> Whether the compiled patterns are equal</p> </div> </div> <hr> <div class="refsect2"> <a name="g-pattern-match"></a><h3>g_pattern_match ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> g_pattern_match (<em class="parameter"><code><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> *pspec</code></em>, <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint" title="guint"><span class="type">guint</span></a> string_length</code></em>, <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *string</code></em>, <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *string_reversed</code></em>);</pre> <p>Matches a string against a compiled pattern. Passing the correct length of the string given is mandatory. The reversed string can be omitted by passing <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>, this is more efficient if the reversed version of the string to be matched is not at hand, as <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match" title="g_pattern_match ()"><code class="function">g_pattern_match()</code></a> will only construct it if the compiled pattern requires reverse matches.</p> <p>Note that, if the user code will (possibly) match a string against a multitude of patterns containing wildcards, chances are high that some patterns will require a reversed string. In this case, it's more efficient to provide the reversed string to avoid multiple constructions thereof in the various calls to <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match" title="g_pattern_match ()"><code class="function">g_pattern_match()</code></a>.</p> <p>Note also that the reverse of a UTF-8 encoded string can in general not be obtained by <a class="link" href="glib-String-Utility-Functions.html#g-strreverse" title="g_strreverse ()"><code class="function">g_strreverse()</code></a>. This works only if the string does not contain any multibyte characters. GLib offers the <a class="link" href="glib-Unicode-Manipulation.html#g-utf8-strreverse" title="g_utf8_strreverse ()"><code class="function">g_utf8_strreverse()</code></a> function to reverse UTF-8 encoded strings.</p> <div class="refsect3"> <a name="g-pattern-match.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>pspec</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>string_length</p></td> <td class="parameter_description"><p>the length of <em class="parameter"><code>string</code></em> (in bytes, i.e. <code class="function">strlen()</code>, not <a class="link" href="glib-Unicode-Manipulation.html#g-utf8-strlen" title="g_utf8_strlen ()"><code class="function">g_utf8_strlen()</code></a>)</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>string</p></td> <td class="parameter_description"><p>the UTF-8 encoded string to match</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>string_reversed</p></td> <td class="parameter_description"><p>the reverse of <em class="parameter"><code>string</code></em> or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="g-pattern-match.returns"></a><h4>Returns</h4> <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>string</code></em> matches <em class="parameter"><code>pspec</code></em> </p> </div> </div> <hr> <div class="refsect2"> <a name="g-pattern-match-string"></a><h3>g_pattern_match_string ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> g_pattern_match_string (<em class="parameter"><code><a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a> *pspec</code></em>, <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *string</code></em>);</pre> <p>Matches a string against a compiled pattern. If the string is to be matched against more than one pattern, consider using <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match" title="g_pattern_match ()"><code class="function">g_pattern_match()</code></a> instead while supplying the reversed string.</p> <div class="refsect3"> <a name="g-pattern-match-string.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>pspec</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Glob-style-pattern-matching.html#GPatternSpec" title="GPatternSpec"><span class="type">GPatternSpec</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>string</p></td> <td class="parameter_description"><p>the UTF-8 encoded string to match</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="g-pattern-match-string.returns"></a><h4>Returns</h4> <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>string</code></em> matches <em class="parameter"><code>pspec</code></em> </p> </div> </div> <hr> <div class="refsect2"> <a name="g-pattern-match-simple"></a><h3>g_pattern_match_simple ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> g_pattern_match_simple (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *pattern</code></em>, <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *string</code></em>);</pre> <p>Matches a string against a pattern given as a string. If this function is to be called in a loop, it's more efficient to compile the pattern once with <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-spec-new" title="g_pattern_spec_new ()"><code class="function">g_pattern_spec_new()</code></a> and call <a class="link" href="glib-Glob-style-pattern-matching.html#g-pattern-match-string" title="g_pattern_match_string ()"><code class="function">g_pattern_match_string()</code></a> repeatedly.</p> <div class="refsect3"> <a name="g-pattern-match-simple.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>pattern</p></td> <td class="parameter_description"><p>the UTF-8 encoded pattern</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>string</p></td> <td class="parameter_description"><p>the UTF-8 encoded string to match</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="g-pattern-match-simple.returns"></a><h4>Returns</h4> <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>string</code></em> matches <em class="parameter"><code>pspec</code></em> </p> </div> </div> </div> <div class="refsect1"> <a name="glib-Glob-style-pattern-matching.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="GPatternSpec"></a><h3>GPatternSpec</h3> <pre class="programlisting">typedef struct _GPatternSpec GPatternSpec;</pre> <p>A GPatternSpec struct is the 'compiled' form of a pattern. This structure is opaque and its fields cannot be accessed directly.</p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>