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Diffstat (limited to 'docs/manual/modify.html')
| -rw-r--r-- | docs/manual/modify.html | 274 |
1 files changed, 173 insertions, 101 deletions
diff --git a/docs/manual/modify.html b/docs/manual/modify.html index f2f7785..05b0fbe 100644 --- a/docs/manual/modify.html +++ b/docs/manual/modify.html @@ -3,16 +3,16 @@ <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Modifying document data</title> <link rel="stylesheet" href="../pugixml.css" type="text/css"> -<meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> -<link rel="home" href="../manual.html" title="pugixml 1.2"> -<link rel="up" href="../manual.html" title="pugixml 1.2"> +<meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> +<link rel="home" href="../manual.html" title="pugixml 1.4"> +<link rel="up" href="../manual.html" title="pugixml 1.4"> <link rel="prev" href="access.html" title="Accessing document data"> <link rel="next" href="saving.html" title="Saving document"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table width="100%"><tr> <td> -<a href="http://pugixml.org/">pugixml 1.2</a> manual | +<a href="http://pugixml.org/">pugixml 1.4</a> manual | <a href="../manual.html">Overview</a> | <a href="install.html">Installation</a> | Document: @@ -28,15 +28,16 @@ <hr> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> -<a name="manual.modify"></a><a class="link" href="modify.html" title="Modifying document data"> Modifying document data</a> +<a name="manual.modify"></a><a class="link" href="modify.html" title="Modifying document data">Modifying document data</a> </h2></div></div></div> -<div class="toc"><dl> -<dt><span class="section"><a href="modify.html#manual.modify.nodedata"> Setting node data</a></span></dt> -<dt><span class="section"><a href="modify.html#manual.modify.attrdata"> Setting attribute data</a></span></dt> -<dt><span class="section"><a href="modify.html#manual.modify.add"> Adding nodes/attributes</a></span></dt> -<dt><span class="section"><a href="modify.html#manual.modify.remove"> Removing nodes/attributes</a></span></dt> -<dt><span class="section"><a href="modify.html#manual.modify.text"> Working with text contents</a></span></dt> -<dt><span class="section"><a href="modify.html#manual.modify.clone"> Cloning nodes/attributes</a></span></dt> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="modify.html#manual.modify.nodedata">Setting node data</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.attrdata">Setting attribute data</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.add">Adding nodes/attributes</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.remove">Removing nodes/attributes</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.text">Working with text contents</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.clone">Cloning nodes/attributes</a></span></dt> +<dt><span class="section"><a href="modify.html#manual.modify.fragments">Assembling document from fragments</a></span></dt> </dl></div> <p> The document in pugixml is fully mutable: you can completely change the document @@ -60,11 +61,12 @@ </p> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.nodedata"></a><a class="link" href="modify.html#manual.modify.nodedata" title="Setting node data"> Setting node data</a> +<a name="manual.modify.nodedata"></a><a class="link" href="modify.html#manual.modify.nodedata" title="Setting node data">Setting node data</a> </h3></div></div></div> -<a name="xml_node::set_name"></a><a name="xml_node::set_value"></a><p> - As discussed before, nodes can have name and value, both of which are strings. - Depending on node type, name or value may be absent. <a class="link" href="dom.html#node_document">node_document</a> +<p> + <a name="xml_node::set_name"></a><a name="xml_node::set_value"></a>As discussed + before, nodes can have name and value, both of which are strings. Depending + on node type, name or value may be absent. <a class="link" href="dom.html#node_document">node_document</a> nodes do not have a name or value, <a class="link" href="dom.html#node_element">node_element</a> and <a class="link" href="dom.html#node_declaration">node_declaration</a> nodes always have a name but never have a value, <a class="link" href="dom.html#node_pcdata">node_pcdata</a>, @@ -96,31 +98,31 @@ This is an example of setting node name and value (<a href="../samples/modify_base.cpp" target="_top">samples/modify_base.cpp</a>): </p> <p> - </p> <pre class="programlisting"><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">node</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"node"</span><span class="special">);</span> -<span class="comment">// change node name -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"notnode"</span><span class="special">);</span> +<span class="comment">// change node name</span> +<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"notnode"</span><span class="special">);</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">", new node name: "</span> <span class="special"><<</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">name</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> -<span class="comment">// change comment text -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">last_child</span><span class="special">().</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"useless comment"</span><span class="special">);</span> +<span class="comment">// change comment text</span> +<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">last_child</span><span class="special">().</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"useless comment"</span><span class="special">);</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">", new comment text: "</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">last_child</span><span class="special">().</span><span class="identifier">value</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> -<span class="comment">// we can't change value of the element or name of the comment -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"1"</span><span class="special">)</span> <span class="special"><<</span> <span class="string">", "</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">last_child</span><span class="special">().</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"2"</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> +<span class="comment">// we can't change value of the element or name of the comment</span> +<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"1"</span><span class="special">)</span> <span class="special"><<</span> <span class="string">", "</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">last_child</span><span class="special">().</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"2"</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> </pre> <p> </p> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.attrdata"></a><a class="link" href="modify.html#manual.modify.attrdata" title="Setting attribute data"> Setting attribute data</a> +<a name="manual.modify.attrdata"></a><a class="link" href="modify.html#manual.modify.attrdata" title="Setting attribute data">Setting attribute data</a> </h3></div></div></div> -<a name="xml_attribute::set_name"></a><a name="xml_attribute::set_value"></a><p> - All attributes have name and value, both of which are strings (value may - be empty). You can set them with the following functions: +<p> + <a name="xml_attribute::set_name"></a><a name="xml_attribute::set_value"></a>All + attributes have name and value, both of which are strings (value may be empty). + You can set them with the following functions: </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_name</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">rhs</span><span class="special">);</span> @@ -142,6 +144,8 @@ <span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">bool</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="keyword">bool</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="identifier">set_value</span><span class="special">(</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> </pre> <p> The above functions convert the argument to string and then call the base @@ -167,14 +171,14 @@ <th align="left">Note</th> </tr> <tr><td align="left" valign="top"><p> - There are no portable 64-bit types in C++, so there is no corresponding - <code class="computeroutput"><span class="identifier">set_value</span></code> function. If - your platform has a 64-bit integer, you can easily write such a function - yourself. + <code class="computeroutput"><span class="identifier">set_value</span></code> overloads with + <code class="computeroutput"><span class="keyword">long</span> <span class="keyword">long</span></code> + type are only available if your platform has reliable support for the type, + including string conversions. </p></td></tr> </table></div> -<a name="xml_attribute::assign"></a><p> - For convenience, all <code class="computeroutput"><span class="identifier">set_value</span></code> +<p> + <a name="xml_attribute::assign"></a>For convenience, all <code class="computeroutput"><span class="identifier">set_value</span></code> functions have the corresponding assignment operators: </p> <pre class="programlisting"><span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">rhs</span><span class="special">);</span> @@ -182,6 +186,8 @@ <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">double</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">bool</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">xml_attribute</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> </pre> <p> These operators simply call the right <code class="computeroutput"><span class="identifier">set_value</span></code> @@ -193,20 +199,19 @@ This is an example of setting attribute name and value (<a href="../samples/modify_base.cpp" target="_top">samples/modify_base.cpp</a>): </p> <p> - </p> <pre class="programlisting"><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_attribute</span> <span class="identifier">attr</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">attribute</span><span class="special">(</span><span class="string">"id"</span><span class="special">);</span> -<span class="comment">// change attribute name/value -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"key"</span><span class="special">)</span> <span class="special"><<</span> <span class="string">", "</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"345"</span><span class="special">);</span> +<span class="comment">// change attribute name/value</span> +<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_name</span><span class="special">(</span><span class="string">"key"</span><span class="special">)</span> <span class="special"><<</span> <span class="string">", "</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"345"</span><span class="special">);</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">", new attribute: "</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">name</span><span class="special">()</span> <span class="special"><<</span> <span class="string">"="</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">value</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> -<span class="comment">// we can use numbers or booleans -</span><span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="number">1.234</span><span class="special">);</span> +<span class="comment">// we can use numbers or booleans</span> +<span class="identifier">attr</span><span class="special">.</span><span class="identifier">set_value</span><span class="special">(</span><span class="number">1.234</span><span class="special">);</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"new attribute value: "</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">value</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> -<span class="comment">// we can also use assignment operators for more concise code -</span><span class="identifier">attr</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">;</span> +<span class="comment">// we can also use assignment operators for more concise code</span> +<span class="identifier">attr</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"final attribute value: "</span> <span class="special"><<</span> <span class="identifier">attr</span><span class="special">.</span><span class="identifier">value</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> </pre> <p> @@ -214,10 +219,11 @@ </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.add"></a><a class="link" href="modify.html#manual.modify.add" title="Adding nodes/attributes"> Adding nodes/attributes</a> +<a name="manual.modify.add"></a><a class="link" href="modify.html#manual.modify.add" title="Adding nodes/attributes">Adding nodes/attributes</a> </h3></div></div></div> -<a name="xml_node::prepend_attribute"></a><a name="xml_node::append_attribute"></a><a name="xml_node::insert_attribute_after"></a><a name="xml_node::insert_attribute_before"></a><a name="xml_node::prepend_child"></a><a name="xml_node::append_child"></a><a name="xml_node::insert_child_after"></a><a name="xml_node::insert_child_before"></a><p> - Nodes and attributes do not exist without a document tree, so you can't create +<p> + <a name="xml_node::prepend_attribute"></a><a name="xml_node::append_attribute"></a><a name="xml_node::insert_attribute_after"></a><a name="xml_node::insert_attribute_before"></a><a name="xml_node::prepend_child"></a><a name="xml_node::append_child"></a><a name="xml_node::insert_child_after"></a><a name="xml_node::insert_child_before"></a>Nodes + and attributes do not exist without a document tree, so you can't create them without adding them to some document. A node or attribute can be created at the end of node/attribute list or before/after some other node: </p> @@ -260,7 +266,7 @@ All functions return the handle to the created object on success, and null handle on failure. There are several reasons for failure: </p> -<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> Adding fails if the target node is null; </li> @@ -311,20 +317,19 @@ This is an example of adding new attributes/nodes to the document (<a href="../samples/modify_add.cpp" target="_top">samples/modify_add.cpp</a>): </p> <p> - </p> -<pre class="programlisting"><span class="comment">// add node with some name -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">node</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"node"</span><span class="special">);</span> +<pre class="programlisting"><span class="comment">// add node with some name</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">node</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"node"</span><span class="special">);</span> -<span class="comment">// add description node with text child -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">descr</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"description"</span><span class="special">);</span> +<span class="comment">// add description node with text child</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">descr</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"description"</span><span class="special">);</span> <span class="identifier">descr</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">node_pcdata</span><span class="special">).</span><span class="identifier">set_value</span><span class="special">(</span><span class="string">"Simple node"</span><span class="special">);</span> -<span class="comment">// add param node before the description -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">param</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">insert_child_before</span><span class="special">(</span><span class="string">"param"</span><span class="special">,</span> <span class="identifier">descr</span><span class="special">);</span> +<span class="comment">// add param node before the description</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">param</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">insert_child_before</span><span class="special">(</span><span class="string">"param"</span><span class="special">,</span> <span class="identifier">descr</span><span class="special">);</span> -<span class="comment">// add attributes to param node -</span><span class="identifier">param</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"name"</span><span class="special">)</span> <span class="special">=</span> <span class="string">"version"</span><span class="special">;</span> +<span class="comment">// add attributes to param node</span> +<span class="identifier">param</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"name"</span><span class="special">)</span> <span class="special">=</span> <span class="string">"version"</span><span class="special">;</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"value"</span><span class="special">)</span> <span class="special">=</span> <span class="number">1.1</span><span class="special">;</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">insert_attribute_after</span><span class="special">(</span><span class="string">"type"</span><span class="special">,</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">attribute</span><span class="special">(</span><span class="string">"name"</span><span class="special">))</span> <span class="special">=</span> <span class="string">"float"</span><span class="special">;</span> </pre> @@ -333,10 +338,11 @@ </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.remove"></a><a class="link" href="modify.html#manual.modify.remove" title="Removing nodes/attributes"> Removing nodes/attributes</a> +<a name="manual.modify.remove"></a><a class="link" href="modify.html#manual.modify.remove" title="Removing nodes/attributes">Removing nodes/attributes</a> </h3></div></div></div> -<a name="xml_node::remove_attribute"></a><a name="xml_node::remove_child"></a><p> - If you do not want your document to contain some node or attribute, you can +<p> + <a name="xml_node::remove_attribute"></a><a name="xml_node::remove_child"></a>If + you do not want your document to contain some node or attribute, you can remove it with one of the following functions: </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">remove_attribute</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">a</span><span class="special">);</span> @@ -350,7 +356,7 @@ attributes) from the document, and returns the operation result. Removing fails if one of the following is true: </p> -<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> The node the function is called on is null; </li> @@ -388,18 +394,17 @@ This is an example of removing attributes/nodes from the document (<a href="../samples/modify_remove.cpp" target="_top">samples/modify_remove.cpp</a>): </p> <p> - </p> -<pre class="programlisting"><span class="comment">// remove description node with the whole subtree -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">node</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"node"</span><span class="special">);</span> +<pre class="programlisting"><span class="comment">// remove description node with the whole subtree</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">node</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"node"</span><span class="special">);</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">remove_child</span><span class="special">(</span><span class="string">"description"</span><span class="special">);</span> -<span class="comment">// remove id attribute -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">param</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"param"</span><span class="special">);</span> +<span class="comment">// remove id attribute</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">param</span> <span class="special">=</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"param"</span><span class="special">);</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">remove_attribute</span><span class="special">(</span><span class="string">"value"</span><span class="special">);</span> -<span class="comment">// we can also remove nodes/attributes by handles -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_attribute</span> <span class="identifier">id</span> <span class="special">=</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">attribute</span><span class="special">(</span><span class="string">"name"</span><span class="special">);</span> +<span class="comment">// we can also remove nodes/attributes by handles</span> +<span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_attribute</span> <span class="identifier">id</span> <span class="special">=</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">attribute</span><span class="special">(</span><span class="string">"name"</span><span class="special">);</span> <span class="identifier">param</span><span class="special">.</span><span class="identifier">remove_attribute</span><span class="special">(</span><span class="identifier">id</span><span class="special">);</span> </pre> <p> @@ -407,7 +412,7 @@ </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.text"></a><a class="link" href="modify.html#manual.modify.text" title="Working with text contents"> Working with text contents</a> +<a name="manual.modify.text"></a><a class="link" href="modify.html#manual.modify.text" title="Working with text contents">Working with text contents</a> </h3></div></div></div> <p> pugixml provides a special class, <code class="computeroutput"><span class="identifier">xml_text</span></code>, @@ -416,8 +421,8 @@ documentation for accessing document data</a>; this section describes the modification interface of <code class="computeroutput"><span class="identifier">xml_text</span></code>. </p> -<a name="xml_text::set"></a><p> - Once you have an <code class="computeroutput"><span class="identifier">xml_text</span></code> +<p> + <a name="xml_text::set"></a>Once you have an <code class="computeroutput"><span class="identifier">xml_text</span></code> object, you can set the text contents using the following function: </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">rhs</span><span class="special">);</span> @@ -434,14 +439,16 @@ an element node, this function creates the PCDATA child node if necessary (i.e. if the element node does not have a PCDATA/CDATA child already). </p> -<a name="xml_text::set_value"></a><p> - In addition to a string function, several functions are provided for handling - text with numbers and booleans as contents: +<p> + <a name="xml_text::set_value"></a>In addition to a string function, several + functions are provided for handling text with numbers and booleans as contents: </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">bool</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="keyword">bool</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="identifier">set</span><span class="special">(</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> </pre> <p> The above functions convert the argument to string and then call the base @@ -450,8 +457,8 @@ functions. You can <a class="link" href="modify.html#xml_attribute::set_value">refer to documentation for the attribute functions</a> for details. </p> -<a name="xml_text::assign"></a><p> - For convenience, all <code class="computeroutput"><span class="identifier">set</span></code> +<p> + <a name="xml_text::assign"></a>For convenience, all <code class="computeroutput"><span class="identifier">set</span></code> functions have the corresponding assignment operators: </p> <pre class="programlisting"><span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">rhs</span><span class="special">);</span> @@ -459,6 +466,8 @@ <span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">double</span> <span class="identifier">rhs</span><span class="special">);</span> <span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">bool</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> +<span class="identifier">xml_text</span><span class="special">&</span> <span class="identifier">xml_text</span><span class="special">::</span><span class="keyword">operator</span><span class="special">=(</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">rhs</span><span class="special">);</span> </pre> <p> These operators simply call the right <code class="computeroutput"><span class="identifier">set</span></code> @@ -471,30 +480,29 @@ object to modify text contents (<a href="../samples/text.cpp" target="_top">samples/text.cpp</a>): </p> <p> - </p> -<pre class="programlisting"><span class="comment">// change project version -</span><span class="identifier">project</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"version"</span><span class="special">).</span><span class="identifier">text</span><span class="special">()</span> <span class="special">=</span> <span class="number">1.2</span><span class="special">;</span> +<pre class="programlisting"><span class="comment">// change project version</span> +<span class="identifier">project</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"version"</span><span class="special">).</span><span class="identifier">text</span><span class="special">()</span> <span class="special">=</span> <span class="number">1.2</span><span class="special">;</span> -<span class="comment">// add description element and set the contents -</span><span class="comment">// note that we do not have to explicitly add the node_pcdata child -</span><span class="identifier">project</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"description"</span><span class="special">).</span><span class="identifier">text</span><span class="special">().</span><span class="identifier">set</span><span class="special">(</span><span class="string">"a test project"</span><span class="special">);</span> +<span class="comment">// add description element and set the contents</span> +<span class="comment">// note that we do not have to explicitly add the node_pcdata child</span> +<span class="identifier">project</span><span class="special">.</span><span class="identifier">append_child</span><span class="special">(</span><span class="string">"description"</span><span class="special">).</span><span class="identifier">text</span><span class="special">().</span><span class="identifier">set</span><span class="special">(</span><span class="string">"a test project"</span><span class="special">);</span> </pre> <p> </p> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> -<a name="manual.modify.clone"></a><a class="link" href="modify.html#manual.modify.clone" title="Cloning nodes/attributes"> Cloning nodes/attributes</a> +<a name="manual.modify.clone"></a><a class="link" href="modify.html#manual.modify.clone" title="Cloning nodes/attributes">Cloning nodes/attributes</a> </h3></div></div></div> -<a name="xml_node::prepend_copy"></a><a name="xml_node::append_copy"></a><a name="xml_node::insert_copy_after"></a><a name="xml_node::insert_copy_before"></a><p> - With the help of previously described functions, it is possible to create - trees with any contents and structure, including cloning the existing data. - However since this is an often needed operation, pugixml provides built-in - node/attribute cloning facilities. Since nodes and attributes do not exist - without a document tree, you can't create a standalone copy - you have to - immediately insert it somewhere in the tree. For this, you can use one of - the following functions: +<p> + <a name="xml_node::prepend_copy"></a><a name="xml_node::append_copy"></a><a name="xml_node::insert_copy_after"></a><a name="xml_node::insert_copy_before"></a>With + the help of previously described functions, it is possible to create trees + with any contents and structure, including cloning the existing data. However + since this is an often needed operation, pugixml provides built-in node/attribute + cloning facilities. Since nodes and attributes do not exist without a document + tree, you can't create a standalone copy - you have to immediately insert + it somewhere in the tree. For this, you can use one of the following functions: </p> <pre class="programlisting"><span class="identifier">xml_attribute</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">append_copy</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">proto</span><span class="special">);</span> <span class="identifier">xml_attribute</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">prepend_copy</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">xml_attribute</span><span class="special">&</span> <span class="identifier">proto</span><span class="special">);</span> @@ -528,7 +536,7 @@ for more information</a>. There are additional caveats specific to cloning functions: </p> -<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> Cloning null handles results in operation failure; </li> @@ -551,7 +559,6 @@ node cloning and usage of other document modification functions: </p> <p> - </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">load_preprocess</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_document</span><span class="special">&</span> <span class="identifier">doc</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">path</span><span class="special">);</span> @@ -563,23 +570,23 @@ <span class="special">{</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">include</span> <span class="special">=</span> <span class="identifier">child</span><span class="special">;</span> - <span class="comment">// load new preprocessed document (note: ideally this should handle relative paths) -</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">path</span> <span class="special">=</span> <span class="identifier">include</span><span class="special">.</span><span class="identifier">value</span><span class="special">();</span> + <span class="comment">// load new preprocessed document (note: ideally this should handle relative paths)</span> + <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">path</span> <span class="special">=</span> <span class="identifier">include</span><span class="special">.</span><span class="identifier">value</span><span class="special">();</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_document</span> <span class="identifier">doc</span><span class="special">;</span> <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">load_preprocess</span><span class="special">(</span><span class="identifier">doc</span><span class="special">,</span> <span class="identifier">path</span><span class="special">))</span> <span class="keyword">return</span> <span class="keyword">false</span><span class="special">;</span> - <span class="comment">// insert the comment marker above include directive -</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">insert_child_before</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">node_comment</span><span class="special">,</span> <span class="identifier">include</span><span class="special">).</span><span class="identifier">set_value</span><span class="special">(</span><span class="identifier">path</span><span class="special">);</span> + <span class="comment">// insert the comment marker above include directive</span> + <span class="identifier">node</span><span class="special">.</span><span class="identifier">insert_child_before</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">node_comment</span><span class="special">,</span> <span class="identifier">include</span><span class="special">).</span><span class="identifier">set_value</span><span class="special">(</span><span class="identifier">path</span><span class="special">);</span> - <span class="comment">// copy the document above the include directive (this retains the original order!) -</span> <span class="keyword">for</span> <span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">ic</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">first_child</span><span class="special">();</span> <span class="identifier">ic</span><span class="special">;</span> <span class="identifier">ic</span> <span class="special">=</span> <span class="identifier">ic</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">())</span> + <span class="comment">// copy the document above the include directive (this retains the original order!)</span> + <span class="keyword">for</span> <span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">ic</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">first_child</span><span class="special">();</span> <span class="identifier">ic</span><span class="special">;</span> <span class="identifier">ic</span> <span class="special">=</span> <span class="identifier">ic</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">())</span> <span class="special">{</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">insert_copy_before</span><span class="special">(</span><span class="identifier">ic</span><span class="special">,</span> <span class="identifier">include</span><span class="special">);</span> <span class="special">}</span> - <span class="comment">// remove the include node and move to the next child -</span> <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">child</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">();</span> + <span class="comment">// remove the include node and move to the next child</span> + <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">child</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">();</span> <span class="identifier">node</span><span class="special">.</span><span class="identifier">remove_child</span><span class="special">(</span><span class="identifier">include</span><span class="special">);</span> <span class="special">}</span> @@ -596,18 +603,83 @@ <span class="keyword">bool</span> <span class="identifier">load_preprocess</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_document</span><span class="special">&</span> <span class="identifier">doc</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">path</span><span class="special">)</span> <span class="special">{</span> - <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_parse_result</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">load_file</span><span class="special">(</span><span class="identifier">path</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">parse_default</span> <span class="special">|</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">parse_pi</span><span class="special">);</span> <span class="comment">// for <?include?> -</span> + <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_parse_result</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">load_file</span><span class="special">(</span><span class="identifier">path</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">parse_default</span> <span class="special">|</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">parse_pi</span><span class="special">);</span> <span class="comment">// for <?include?></span> + <span class="keyword">return</span> <span class="identifier">result</span> <span class="special">?</span> <span class="identifier">preprocess</span><span class="special">(</span><span class="identifier">doc</span><span class="special">)</span> <span class="special">:</span> <span class="keyword">false</span><span class="special">;</span> <span class="special">}</span> </pre> <p> </p> </div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="manual.modify.fragments"></a><a class="link" href="modify.html#manual.modify.fragments" title="Assembling document from fragments">Assembling document from fragments</a> +</h3></div></div></div> +<p> + <a name="xml_node::append_buffer"></a>pugixml provides several ways to assemble + an XML document from other XML documents. Assuming there is a set of document + fragments, represented as in-memory buffers, the implementation choices are + as follows: + </p> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> + Use a temporary document to parse the data from a string, then clone + the nodes to a destination node. For example: + </li></ul></div> +<pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">append_fragment</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">target</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">buffer</span><span class="special">,</span> <span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">)</span> +<span class="special">{</span> + <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_document</span> <span class="identifier">doc</span><span class="special">;</span> + <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">load_buffer</span><span class="special">(</span><span class="identifier">buffer</span><span class="special">,</span> <span class="identifier">size</span><span class="special">))</span> <span class="keyword">return</span> <span class="keyword">false</span><span class="special">;</span> + + <span class="keyword">for</span> <span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">first_child</span><span class="special">();</span> <span class="identifier">child</span><span class="special">;</span> <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">child</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">())</span> + <span class="identifier">target</span><span class="special">.</span><span class="identifier">append_copy</span><span class="special">(</span><span class="identifier">child</span><span class="special">);</span> +<span class="special">}</span> +</pre> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> + Cache the parsing step - instead of keeping in-memory buffers, keep document + objects that already contain the parsed fragment: + </li></ul></div> +<pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">append_fragment</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">target</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_document</span><span class="special">&</span> <span class="identifier">cached_fragment</span><span class="special">)</span> +<span class="special">{</span> + <span class="keyword">for</span> <span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">cached_fragment</span><span class="special">.</span><span class="identifier">first_child</span><span class="special">();</span> <span class="identifier">child</span><span class="special">;</span> <span class="identifier">child</span> <span class="special">=</span> <span class="identifier">child</span><span class="special">.</span><span class="identifier">next_sibling</span><span class="special">())</span> + <span class="identifier">target</span><span class="special">.</span><span class="identifier">append_copy</span><span class="special">(</span><span class="identifier">child</span><span class="special">);</span> +<span class="special">}</span> +</pre> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> + Use xml_node::append_buffer directly: + </li></ul></div> +<pre class="programlisting"><span class="identifier">xml_parse_result</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">append_buffer</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">void</span><span class="special">*</span> <span class="identifier">contents</span><span class="special">,</span> <span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">options</span> <span class="special">=</span> <span class="identifier">parse_default</span><span class="special">,</span> <span class="identifier">xml_encoding</span> <span class="identifier">encoding</span> <span class="special">=</span> <span class="identifier">encoding_auto</span><span class="special">);</span> +</pre> +<p> + The first method is more convenient, but slower than the other two. The relative + performance of <code class="computeroutput"><span class="identifier">append_copy</span></code> + and <code class="computeroutput"><span class="identifier">append_buffer</span></code> depends + on the buffer format - usually <code class="computeroutput"><span class="identifier">append_buffer</span></code> + is faster if the buffer is in native encoding (UTF-8 or wchar_t, depending + on <code class="computeroutput"><span class="identifier">PUGIXML_WCHAR_MODE</span></code>). At + the same time it might be less efficient in terms of memory usage - the implementation + makes a copy of the provided buffer, and the copy has the same lifetime as + the document - the memory used by that copy will be reclaimed after the document + is destroyed, but no sooner. Even deleting all nodes in the document, including + the appended ones, won't reclaim the memory. + </p> +<p> + <code class="computeroutput"><span class="identifier">append_buffer</span></code> behaves in + the same way as <a class="link" href="loading.html#xml_document::load_buffer">xml_document::load_buffer</a> + - the input buffer is a byte buffer, with size in bytes; the buffer is not + modified and can be freed after the function returns. + </p> +<p> + <a name="status_append_invalid_root"></a>Since <code class="computeroutput"><span class="identifier">append_buffer</span></code> + needs to append child nodes to the current node, it only works if the current + node is either document or element node. Calling <code class="computeroutput"><span class="identifier">append_buffer</span></code> + on a node with any other type results in an error with <code class="computeroutput"><span class="identifier">status_append_invalid_root</span></code> + status. + </p> +</div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> -<td align="right"><div class="copyright-footer">Copyright © 2012 Arseny Kapoulkine<p> +<td align="right"><div class="copyright-footer">Copyright © 2014 Arseny Kapoulkine<p> Distributed under the MIT License </p> </div></td> @@ -615,7 +687,7 @@ <hr> <table width="100%"><tr> <td> -<a href="http://pugixml.org/">pugixml 1.2</a> manual | +<a href="http://pugixml.org/">pugixml 1.4</a> manual | <a href="../manual.html">Overview</a> | <a href="install.html">Installation</a> | Document: |