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| author | Arseny Kapoulkine <arseny.kapoulkine@gmail.com> | 2015-03-21 21:04:28 -0700 |
|---|---|---|
| committer | Arseny Kapoulkine <arseny.kapoulkine@gmail.com> | 2015-03-21 21:04:28 -0700 |
| commit | 2843f91d008990e9940e19dbdf8cd906ad1c057d (patch) | |
| tree | 1020355943afcb5ae9a1a19484958f5868911f43 /docs/manual/saving.html | |
| parent | 1a450b302a6339319ed2430312f536ca7690b6a6 (diff) | |
docs: Remove old HTML documentation
Diffstat (limited to 'docs/manual/saving.html')
| -rw-r--r-- | docs/manual/saving.html | 543 |
1 files changed, 0 insertions, 543 deletions
diff --git a/docs/manual/saving.html b/docs/manual/saving.html deleted file mode 100644 index 0a9d642..0000000 --- a/docs/manual/saving.html +++ /dev/null @@ -1,543 +0,0 @@ -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> -<title>Saving document</title> -<link rel="stylesheet" href="../pugixml.css" type="text/css"> -<meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> -<link rel="home" href="../manual.html" title="pugixml 1.6"> -<link rel="up" href="../manual.html" title="pugixml 1.6"> -<link rel="prev" href="modify.html" title="Modifying document data"> -<link rel="next" href="xpath.html" title="XPath"> -</head> -<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> -<table width="100%"><tr> -<td> -<a href="http://pugixml.org/">pugixml 1.6</a> manual | - <a href="../manual.html">Overview</a> | - <a href="install.html">Installation</a> | - Document: - <a href="dom.html">Object model</a> · <a href="loading.html">Loading</a> · <a href="access.html">Accessing</a> · <a href="modify.html">Modifying</a> · <b>Saving</b> | - <a href="xpath.html">XPath</a> | - <a href="apiref.html">API Reference</a> | - <a href="toc.html">Table of Contents</a> -</td> -<td width="*" align="right"><div class="spirit-nav"> -<a accesskey="p" href="modify.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../manual.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../manual.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="xpath.html"><img src="../images/next.png" alt="Next"></a> -</div></td> -</tr></table> -<hr> -<div class="section"> -<div class="titlepage"><div><div><h2 class="title" style="clear: both"> -<a name="manual.saving"></a><a class="link" href="saving.html" title="Saving document"> Saving document</a> -</h2></div></div></div> -<div class="toc"><dl class="toc"> -<dt><span class="section"><a href="saving.html#manual.saving.file"> Saving document to a file</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.stream"> Saving document to C++ IOstreams</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.writer"> Saving document via writer interface</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.subtree"> Saving a single subtree</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.options"> Output options</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.encoding"> Encodings</a></span></dt> -<dt><span class="section"><a href="saving.html#manual.saving.declaration"> Customizing document declaration</a></span></dt> -</dl></div> -<p> - Often after creating a new document or loading the existing one and processing - it, it is necessary to save the result back to file. Also it is occasionally - useful to output the whole document or a subtree to some stream; use cases - include debug printing, serialization via network or other text-oriented medium, - etc. pugixml provides several functions to output any subtree of the document - to a file, stream or another generic transport interface; these functions allow - to customize the output format (see <a class="xref" href="saving.html#manual.saving.options" title="Output options"> Output options</a>), and also perform - necessary encoding conversions (see <a class="xref" href="saving.html#manual.saving.encoding" title="Encodings"> Encodings</a>). This section documents - the relevant functionality. - </p> -<p> - Before writing to the destination the node/attribute data is properly formatted - according to the node type; all special XML symbols, such as < and &, - are properly escaped (unless <a class="link" href="saving.html#format_no_escapes">format_no_escapes</a> - flag is set). In order to guard against forgotten node/attribute names, empty - node/attribute names are printed as <code class="computeroutput"><span class="string">":anonymous"</span></code>. - For well-formed output, make sure all node and attribute names are set to meaningful - values. - </p> -<p> - CDATA sections with values that contain <code class="computeroutput"><span class="string">"]]>"</span></code> - are split into several sections as follows: section with value <code class="computeroutput"><span class="string">"pre]]>post"</span></code> is written as <code class="computeroutput"><span class="special"><![</span><span class="identifier">CDATA</span><span class="special">[</span><span class="identifier">pre</span><span class="special">]]]]><![</span><span class="identifier">CDATA</span><span class="special">[></span><span class="identifier">post</span><span class="special">]]></span></code>. - While this alters the structure of the document (if you load the document after - saving it, there will be two CDATA sections instead of one), this is the only - way to escape CDATA contents. - </p> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="manual.saving.file"></a><a class="link" href="saving.html#manual.saving.file" title="Saving document to a file"> Saving document to a file</a> -</h3></div></div></div> -<a name="xml_document::save_file"></a><a name="xml_document::save_file_wide"></a><p> - If you want to save the whole document to a file, you can use one of the - following functions: - </p> -<pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save_file</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="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">const</span><span class="special">;</span> -<span class="keyword">bool</span> <span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save_file</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">wchar_t</span><span class="special">*</span> <span class="identifier">path</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">const</span><span class="special">;</span> -</pre> -<p> - These functions accept file path as its first argument, and also three optional - arguments, which specify indentation and other output options (see <a class="xref" href="saving.html#manual.saving.options" title="Output options"> Output options</a>) - and output data encoding (see <a class="xref" href="saving.html#manual.saving.encoding" title="Encodings"> Encodings</a>). The path has the target - operating system format, so it can be a relative or absolute one, it should - have the delimiters of the target system, it should have the exact case if - the target file system is case-sensitive, etc. - </p> -<p> - File path is passed to the system file opening function as is in case of - the first function (which accepts <code class="computeroutput"><span class="keyword">const</span> - <span class="keyword">char</span><span class="special">*</span> <span class="identifier">path</span></code>); the second function either uses - a special file opening function if it is provided by the runtime library - or converts the path to UTF-8 and uses the system file opening function. - </p> -<a name="xml_writer_file"></a><p> - <code class="computeroutput"><span class="identifier">save_file</span></code> opens the target - file for writing, outputs the requested header (by default a document declaration - is output, unless the document already has one), and then saves the document - contents. If the file could not be opened, the function returns <code class="computeroutput"><span class="keyword">false</span></code>. Calling <code class="computeroutput"><span class="identifier">save_file</span></code> - is equivalent to creating an <code class="computeroutput"><span class="identifier">xml_writer_file</span></code> - object with <code class="computeroutput"><span class="identifier">FILE</span><span class="special">*</span></code> - handle as the only constructor argument and then calling <code class="computeroutput"><span class="identifier">save</span></code>; - see <a class="xref" href="saving.html#manual.saving.writer" title="Saving document via writer interface"> Saving document via writer interface</a> for writer interface details. - </p> -<p> - This is a simple example of saving XML document to file (<a href="../samples/save_file.cpp" target="_top">samples/save_file.cpp</a>): - </p> -<p> - -</p> -<pre class="programlisting"><span class="comment">// save document to file -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Saving result: "</span> <span class="special"><<</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">save_file</span><span class="special">(</span><span class="string">"save_file_output.xml"</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.saving.stream"></a><a class="link" href="saving.html#manual.saving.stream" title="Saving document to C++ IOstreams"> Saving document to C++ IOstreams</a> -</h3></div></div></div> -<a name="xml_document::save_stream"></a><p> - To enhance interoperability pugixml provides functions for saving document - to any object which implements C++ <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span></code> - interface. This allows you to save documents to any standard C++ stream (i.e. - file stream) or any third-party compliant implementation (i.e. Boost Iostreams). - Most notably, this allows for easy debug output, since you can use <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span></code> - stream as saving target. There are two functions, one works with narrow character - streams, another handles wide character ones: - </p> -<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">&</span> <span class="identifier">stream</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">const</span><span class="special">;</span> -<span class="keyword">void</span> <span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wostream</span><span class="special">&</span> <span class="identifier">stream</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_default</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> -</pre> -<p> - <code class="computeroutput"><span class="identifier">save</span></code> with <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span></code> - argument saves the document to the stream in the same way as <code class="computeroutput"><span class="identifier">save_file</span></code> (i.e. with requested header and - with encoding conversions). On the other hand, <code class="computeroutput"><span class="identifier">save</span></code> - with <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstream</span></code> argument saves the document to - the wide stream with <a class="link" href="loading.html#encoding_wchar">encoding_wchar</a> - encoding. Because of this, using <code class="computeroutput"><span class="identifier">save</span></code> - with wide character streams requires careful (usually platform-specific) - stream setup (i.e. using the <code class="computeroutput"><span class="identifier">imbue</span></code> - function). Generally use of wide streams is discouraged, however it provides - you with the ability to save documents to non-Unicode encodings, i.e. you - can save Shift-JIS encoded data if you set the correct locale. - </p> -<a name="xml_writer_stream"></a><p> - Calling <code class="computeroutput"><span class="identifier">save</span></code> with stream - target is equivalent to creating an <code class="computeroutput"><span class="identifier">xml_writer_stream</span></code> - object with stream as the only constructor argument and then calling <code class="computeroutput"><span class="identifier">save</span></code>; see <a class="xref" href="saving.html#manual.saving.writer" title="Saving document via writer interface"> Saving document via writer interface</a> for writer - interface details. - </p> -<p> - This is a simple example of saving XML document to standard output (<a href="../samples/save_stream.cpp" target="_top">samples/save_stream.cpp</a>): - </p> -<p> - -</p> -<pre class="programlisting"><span class="comment">// save document to standard output -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Document:\n"</span><span class="special">;</span> -<span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span><span class="special">);</span> -</pre> -<p> - </p> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="manual.saving.writer"></a><a class="link" href="saving.html#manual.saving.writer" title="Saving document via writer interface"> Saving document via writer interface</a> -</h3></div></div></div> -<a name="xml_document::save"></a><a name="xml_writer"></a><a name="xml_writer::write"></a><p> - All of the above saving functions are implemented in terms of writer interface. - This is a simple interface with a single function, which is called several - times during output process with chunks of document data as input: - </p> -<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">xml_writer</span> -<span class="special">{</span> -<span class="keyword">public</span><span class="special">:</span> - <span class="keyword">virtual</span> <span class="keyword">void</span> <span class="identifier">write</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">void</span><span class="special">*</span> <span class="identifier">data</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="number">0</span><span class="special">;</span> -<span class="special">};</span> - -<span class="keyword">void</span> <span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save</span><span class="special">(</span><span class="identifier">xml_writer</span><span class="special">&</span> <span class="identifier">writer</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">const</span><span class="special">;</span> -</pre> -<p> - In order to output the document via some custom transport, for example sockets, - you should create an object which implements <code class="computeroutput"><span class="identifier">xml_writer</span></code> - interface and pass it to <code class="computeroutput"><span class="identifier">save</span></code> - function. <code class="computeroutput"><span class="identifier">xml_writer</span><span class="special">::</span><span class="identifier">write</span></code> function is called with a buffer - as an input, where <code class="computeroutput"><span class="identifier">data</span></code> points - to buffer start, and <code class="computeroutput"><span class="identifier">size</span></code> - is equal to the buffer size in bytes. <code class="computeroutput"><span class="identifier">write</span></code> - implementation must write the buffer to the transport; it can not save the - passed buffer pointer, as the buffer contents will change after <code class="computeroutput"><span class="identifier">write</span></code> returns. The buffer contains the - chunk of document data in the desired encoding. - </p> -<p> - <code class="computeroutput"><span class="identifier">write</span></code> function is called - with relatively large blocks (size is usually several kilobytes, except for - the last block that may be small), so there is often no need for additional - buffering in the implementation. - </p> -<p> - This is a simple example of custom writer for saving document data to STL - string (<a href="../samples/save_custom_writer.cpp" target="_top">samples/save_custom_writer.cpp</a>); - read the sample code for more complex examples: - </p> -<p> - -</p> -<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">xml_string_writer</span><span class="special">:</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_writer</span> -<span class="special">{</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">result</span><span class="special">;</span> - - <span class="keyword">virtual</span> <span class="keyword">void</span> <span class="identifier">write</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">void</span><span class="special">*</span> <span class="identifier">data</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">result</span><span class="special">.</span><span class="identifier">append</span><span class="special">(</span><span class="keyword">static_cast</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">char</span><span class="special">*>(</span><span class="identifier">data</span><span class="special">),</span> <span class="identifier">size</span><span class="special">);</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.saving.subtree"></a><a class="link" href="saving.html#manual.saving.subtree" title="Saving a single subtree"> Saving a single subtree</a> -</h3></div></div></div> -<a name="xml_node::print"></a><a name="xml_node::print_stream"></a><p> - While the previously described functions save the whole document to the destination, - it is easy to save a single subtree. The following functions are provided: - </p> -<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">print</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">&</span> <span class="identifier">os</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">depth</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> -<span class="keyword">void</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">print</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wostream</span><span class="special">&</span> <span class="identifier">os</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_default</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">depth</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> -<span class="keyword">void</span> <span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">print</span><span class="special">(</span><span class="identifier">xml_writer</span><span class="special">&</span> <span class="identifier">writer</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">char_t</span><span class="special">*</span> <span class="identifier">indent</span> <span class="special">=</span> <span class="string">"\t"</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">format_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> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">depth</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> -</pre> -<p> - These functions have the same arguments with the same meaning as the corresponding - <code class="computeroutput"><span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save</span></code> functions, and allow you to save the - subtree to either a C++ IOstream or to any object that implements <code class="computeroutput"><span class="identifier">xml_writer</span></code> interface. - </p> -<p> - Saving a subtree differs from saving the whole document: the process behaves - as if <a class="link" href="saving.html#format_write_bom">format_write_bom</a> is off, and - <a class="link" href="saving.html#format_no_declaration">format_no_declaration</a> is on, - even if actual values of the flags are different. This means that BOM is - not written to the destination, and document declaration is only written - if it is the node itself or is one of node's children. Note that this also - holds if you're saving a document; this example (<a href="../samples/save_subtree.cpp" target="_top">samples/save_subtree.cpp</a>) - illustrates the difference: - </p> -<p> - -</p> -<pre class="programlisting"><span class="comment">// get a test document -</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="identifier">doc</span><span class="special">.</span><span class="identifier">load_string</span><span class="special">(</span><span class="string">"<foo bar='baz'><call>hey</call></foo>"</span><span class="special">);</span> - -<span class="comment">// print document to standard output (prints <?xml version="1.0"?><foo bar="baz"><call>hey</call></foo>) -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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">""</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_raw</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="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> - -<span class="comment">// print document to standard output as a regular node (prints <foo bar="baz"><call>hey</call></foo>) -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">print</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">""</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_raw</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="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> - -<span class="comment">// print a subtree to standard output (prints <call>hey</call>) -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">child</span><span class="special">(</span><span class="string">"foo"</span><span class="special">).</span><span class="identifier">child</span><span class="special">(</span><span class="string">"call"</span><span class="special">).</span><span class="identifier">print</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">""</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_raw</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="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.saving.options"></a><a class="link" href="saving.html#manual.saving.options" title="Output options"> Output options</a> -</h3></div></div></div> -<p> - All saving functions accept the optional parameter <code class="computeroutput"><span class="identifier">flags</span></code>. - This is a bitmask that customizes the output format; you can select the way - the document nodes are printed and select the needed additional information - that is output before the document contents. - </p> -<div class="note"><table border="0" summary="Note"> -<tr> -<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../images/note.png"></td> -<th align="left">Note</th> -</tr> -<tr><td align="left" valign="top"><p> - You should use the usual bitwise arithmetics to manipulate the bitmask: - to enable a flag, use <code class="computeroutput"><span class="identifier">mask</span> <span class="special">|</span> <span class="identifier">flag</span></code>; - to disable a flag, use <code class="computeroutput"><span class="identifier">mask</span> <span class="special">&</span> <span class="special">~</span><span class="identifier">flag</span></code>. - </p></td></tr> -</table></div> -<p> - These flags control the resulting tree contents: - </p> -<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> -<li class="listitem"> - <a name="format_indent"></a><code class="literal">format_indent</code> determines if all nodes - should be indented with the indentation string (this is an additional - parameter for all saving functions, and is <code class="computeroutput"><span class="string">"\t"</span></code> - by default). If this flag is on, before every node the indentation string - is output several times, where the amount of indentation depends on the - node's depth relative to the output subtree. This flag has no effect - if <a class="link" href="saving.html#format_raw">format_raw</a> is enabled. This flag - is <span class="bold"><strong>on</strong></span> by default. <br><br> - - </li> -<li class="listitem"> - <a name="format_raw"></a><code class="literal">format_raw</code> switches between formatted and - raw output. If this flag is on, the nodes are not indented in any way, - and also no newlines that are not part of document text are printed. - Raw mode can be used for serialization where the result is not intended - to be read by humans; also it can be useful if the document was parsed - with <a class="link" href="loading.html#parse_ws_pcdata">parse_ws_pcdata</a> flag, to - preserve the original document formatting as much as possible. This flag - is <span class="bold"><strong>off</strong></span> by default. <br><br> - - </li> -<li class="listitem"> - <a name="format_no_escapes"></a><code class="literal">format_no_escapes</code> disables output - escaping for attribute values and PCDATA contents. If this flag is off, - special symbols (', &, <, >) and all non-printable characters - (those with codepoint values less than 32) are converted to XML escape - sequences (i.e. &amp;) during output. If this flag is on, no text - processing is performed; therefore, output XML can be malformed if output - contents contains invalid symbols (i.e. having a stray < in the PCDATA - will make the output malformed). This flag is <span class="bold"><strong>off</strong></span> - by default. - </li> -</ul></div> -<p> - These flags control the additional output information: - </p> -<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> -<li class="listitem"> - <a name="format_no_declaration"></a><code class="literal">format_no_declaration</code> disables - default node declaration output. By default, if the document is saved - via <code class="computeroutput"><span class="identifier">save</span></code> or <code class="computeroutput"><span class="identifier">save_file</span></code> function, and it does not - have any document declaration, a default declaration is output before - the document contents. Enabling this flag disables this declaration. - This flag has no effect in <code class="computeroutput"><span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">print</span></code> - functions: they never output the default declaration. This flag is <span class="bold"><strong>off</strong></span> by default. <br><br> - - </li> -<li class="listitem"> - <a name="format_write_bom"></a><code class="literal">format_write_bom</code> enables Byte Order - Mark (BOM) output. By default, no BOM is output, so in case of non UTF-8 - encodings the resulting document's encoding may not be recognized by - some parsers and text editors, if they do not implement sophisticated - encoding detection. Enabling this flag adds an encoding-specific BOM - to the output. This flag has no effect in <code class="computeroutput"><span class="identifier">xml_node</span><span class="special">::</span><span class="identifier">print</span></code> - functions: they never output the BOM. This flag is <span class="bold"><strong>off</strong></span> - by default. - </li> -<li class="listitem"> - <a name="format_save_file_text"></a><code class="literal">format_save_file_text</code> changes - the file mode when using <code class="computeroutput"><span class="identifier">save_file</span></code> - function. By default, file is opened in binary mode, which means that - the output file will contain platform-independent newline \n (ASCII 10). - If this flag is on, file is opened in text mode, which on some systems - changes the newline format (i.e. on Windows you can use this flag to - output XML documents with \r\n (ASCII 13 10) newlines. This flag is - <span class="bold"><strong>off</strong></span> by default. - </li> -</ul></div> -<p> - Additionally, there is one predefined option mask: - </p> -<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> - <a name="format_default"></a><code class="literal">format_default</code> is the default set of - flags, i.e. it has all options set to their default values. It sets formatted - output with indentation, without BOM and with default node declaration, - if necessary. - </li></ul></div> -<p> - This is an example that shows the outputs of different output options (<a href="../samples/save_options.cpp" target="_top">samples/save_options.cpp</a>): - </p> -<p> - -</p> -<pre class="programlisting"><span class="comment">// get a test document -</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="identifier">doc</span><span class="special">.</span><span class="identifier">load_string</span><span class="special">(</span><span class="string">"<foo bar='baz'><call>hey</call></foo>"</span><span class="special">);</span> - -<span class="comment">// default options; prints -</span><span class="comment">// <?xml version="1.0"?> -</span><span class="comment">// <foo bar="baz"> -</span><span class="comment">// <call>hey</call> -</span><span class="comment">// </foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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="identifier">std</span><span class="special">::</span><span class="identifier">cout</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">// default options with custom indentation string; prints -</span><span class="comment">// <?xml version="1.0"?> -</span><span class="comment">// <foo bar="baz"> -</span><span class="comment">// --<call>hey</call> -</span><span class="comment">// </foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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">"--"</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="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> - -<span class="comment">// default options without indentation; prints -</span><span class="comment">// <?xml version="1.0"?> -</span><span class="comment">// <foo bar="baz"> -</span><span class="comment">// <call>hey</call> -</span><span class="comment">// </foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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">"\t"</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_default</span> <span class="special">&</span> <span class="special">~</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_indent</span><span class="special">);</span> <span class="comment">// can also pass "" instead of indentation string for the same effect -</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</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">// raw output; prints -</span><span class="comment">// <?xml version="1.0"?><foo bar="baz"><call>hey</call></foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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">"\t"</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_raw</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="identifier">std</span><span class="special">::</span><span class="identifier">endl</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">// raw output without declaration; prints -</span><span class="comment">// <foo bar="baz"><call>hey</call></foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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">"\t"</span><span class="special">,</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_raw</span> <span class="special">|</span> <span class="identifier">pugi</span><span class="special">::</span><span class="identifier">format_no_declaration</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="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.saving.encoding"></a><a class="link" href="saving.html#manual.saving.encoding" title="Encodings"> Encodings</a> -</h3></div></div></div> -<p> - pugixml supports all popular Unicode encodings (UTF-8, UTF-16 (big and little - endian), UTF-32 (big and little endian); UCS-2 is naturally supported since - it's a strict subset of UTF-16) and handles all encoding conversions during - output. The output encoding is set via the <code class="computeroutput"><span class="identifier">encoding</span></code> - parameter of saving functions, which is of type <code class="computeroutput"><span class="identifier">xml_encoding</span></code>. - The possible values for the encoding are documented in <a class="xref" href="loading.html#manual.loading.encoding" title="Encodings"> Encodings</a>; - the only flag that has a different meaning is <code class="computeroutput"><span class="identifier">encoding_auto</span></code>. - </p> -<p> - While all other flags set the exact encoding, <code class="computeroutput"><span class="identifier">encoding_auto</span></code> - is meant for automatic encoding detection. The automatic detection does not - make sense for output encoding, since there is usually nothing to infer the - actual encoding from, so here <code class="computeroutput"><span class="identifier">encoding_auto</span></code> - means UTF-8 encoding, which is the most popular encoding for XML data storage. - This is also the default value of output encoding; specify another value - if you do not want UTF-8 encoded output. - </p> -<p> - Also note that wide stream saving functions do not have <code class="computeroutput"><span class="identifier">encoding</span></code> - argument and always assume <a class="link" href="loading.html#encoding_wchar">encoding_wchar</a> - encoding. - </p> -<div class="note"><table border="0" summary="Note"> -<tr> -<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../images/note.png"></td> -<th align="left">Note</th> -</tr> -<tr><td align="left" valign="top"><p> - The current behavior for Unicode conversion is to skip all invalid UTF - sequences during conversion. This behavior should not be relied upon; if - your node/attribute names do not contain any valid UTF sequences, they - may be output as if they are empty, which will result in malformed XML - document. - </p></td></tr> -</table></div> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="manual.saving.declaration"></a><a class="link" href="saving.html#manual.saving.declaration" title="Customizing document declaration"> Customizing document declaration</a> -</h3></div></div></div> -<p> - When you are saving the document using <code class="computeroutput"><span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save</span><span class="special">()</span></code> or <code class="computeroutput"><span class="identifier">xml_document</span><span class="special">::</span><span class="identifier">save_file</span><span class="special">()</span></code>, a default XML document declaration is - output, if <code class="computeroutput"><span class="identifier">format_no_declaration</span></code> - is not specified and if the document does not have a declaration node. However, - the default declaration is not customizable. If you want to customize the - declaration output, you need to create the declaration node yourself. - </p> -<div class="note"><table border="0" summary="Note"> -<tr> -<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../images/note.png"></td> -<th align="left">Note</th> -</tr> -<tr><td align="left" valign="top"><p> - By default the declaration node is not added to the document during parsing. - If you just need to preserve the original declaration node, you have to - add the flag <a class="link" href="loading.html#parse_declaration">parse_declaration</a> - to the parsing flags; the resulting document will contain the original - declaration node, which will be output during saving. - </p></td></tr> -</table></div> -<p> - Declaration node is a node with type <a class="link" href="dom.html#node_declaration">node_declaration</a>; - it behaves like an element node in that it has attributes with values (but - it does not have child nodes). Therefore setting custom version, encoding - or standalone declaration involves adding attributes and setting attribute - values. - </p> -<p> - This is an example that shows how to create a custom declaration node (<a href="../samples/save_declaration.cpp" target="_top">samples/save_declaration.cpp</a>): - </p> -<p> - -</p> -<pre class="programlisting"><span class="comment">// get a test document -</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="identifier">doc</span><span class="special">.</span><span class="identifier">load_string</span><span class="special">(</span><span class="string">"<foo bar='baz'><call>hey</call></foo>"</span><span class="special">);</span> - -<span class="comment">// add a custom declaration node -</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">xml_node</span> <span class="identifier">decl</span> <span class="special">=</span> <span class="identifier">doc</span><span class="special">.</span><span class="identifier">prepend_child</span><span class="special">(</span><span class="identifier">pugi</span><span class="special">::</span><span class="identifier">node_declaration</span><span class="special">);</span> -<span class="identifier">decl</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"version"</span><span class="special">)</span> <span class="special">=</span> <span class="string">"1.0"</span><span class="special">;</span> -<span class="identifier">decl</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"encoding"</span><span class="special">)</span> <span class="special">=</span> <span class="string">"UTF-8"</span><span class="special">;</span> -<span class="identifier">decl</span><span class="special">.</span><span class="identifier">append_attribute</span><span class="special">(</span><span class="string">"standalone"</span><span class="special">)</span> <span class="special">=</span> <span class="string">"no"</span><span class="special">;</span> - -<span class="comment">// <?xml version="1.0" encoding="UTF-8" standalone="no"?> -</span><span class="comment">// <foo bar="baz"> -</span><span class="comment">// <call>hey</call> -</span><span class="comment">// </foo> -</span><span class="identifier">doc</span><span class="special">.</span><span class="identifier">save</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="identifier">std</span><span class="special">::</span><span class="identifier">cout</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> -<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 © 2014 Arseny Kapoulkine<p> - Distributed under the MIT License - </p> -</div></td> -</tr></table> -<hr> -<table width="100%"><tr> -<td> -<a href="http://pugixml.org/">pugixml 1.6</a> manual | - <a href="../manual.html">Overview</a> | - <a href="install.html">Installation</a> | - Document: - <a href="dom.html">Object model</a> · <a href="loading.html">Loading</a> · <a href="access.html">Accessing</a> · <a href="modify.html">Modifying</a> · <b>Saving</b> | - <a href="xpath.html">XPath</a> | - <a href="apiref.html">API Reference</a> | - <a href="toc.html">Table of Contents</a> -</td> -<td width="*" align="right"><div class="spirit-nav"> -<a accesskey="p" href="modify.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../manual.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../manual.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="xpath.html"><img src="../images/next.png" alt="Next"></a> -</div></td> -</tr></table> -</body> -</html> |