glib-simple-xml-subset-parser.html

glid编写实例

A parse context is used to parse a stream of bytes that you expect to
contain marked-up text. See <a href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-new"><code class="function">g_markup_parse_context_new()</code></a>,
<a href="glib-Simple-XML-Subset-Parser.html#GMarkupParser"><span class="type">GMarkupParser</span></a>, and so on for more details.
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3075927"></a><h3>
<a name="GMarkupParser"></a>GMarkupParser</h3>
<a class="indexterm" name="id3075937"></a><pre class="programlisting">typedef struct {
  /* Called for open tags &lt;foo bar="baz"&gt; */
  void (*start_element)  (GMarkupParseContext *context,
                          const gchar         *element_name,
                          const gchar        **attribute_names,
                          const gchar        **attribute_values,
                          gpointer             user_data,
                          GError             **error);

  /* Called for close tags &lt;/foo&gt; */
  void (*end_element)    (GMarkupParseContext *context,
                          const gchar         *element_name,
                          gpointer             user_data,
                          GError             **error);

  /* Called for character data */
  /* text is not nul-terminated */
  void (*text)           (GMarkupParseContext *context,
                          const gchar         *text,
                          gsize                text_len,  
                          gpointer             user_data,
                          GError             **error);

  /* Called for strings that should be re-saved verbatim in this same
   * position, but are not otherwise interpretable.  At the moment
   * this includes comments and processing instructions.
   */
  /* text is not nul-terminated. */
  void (*passthrough)    (GMarkupParseContext *context,
                          const gchar         *passthrough_text,
                          gsize                text_len,  
                          gpointer             user_data,
                          GError             **error);

  /* Called on error, including one set by other
   * methods in the vtable. The GError should not be freed.
   */
  void (*error)          (GMarkupParseContext *context,
                          GError              *error,
                          gpointer             user_data);
} GMarkupParser;
</pre>
<p>
Any of the fields in <a href="glib-Simple-XML-Subset-Parser.html#GMarkupParser"><span class="type">GMarkupParser</span></a> can be <code class="literal">NULL</code>, in which case they
will be ignored. Except for the <em class="parameter"><code>error</code></em> function, any of these
callbacks can set an error; in particular the
<code class="literal">G_MARKUP_ERROR_UNKNOWN_ELEMENT</code>, <code class="literal">G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE</code>,
and <code class="literal">G_MARKUP_ERROR_INVALID_CONTENT</code> errors are intended to be set 
from these callbacks. If you set an error from a callback,
<a href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-parse"><code class="function">g_markup_parse_context_parse()</code></a> will report that error back to its caller.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="structfield"><code>start_element</code></em>&#160;()</span></td>
<td>Callback to invoke when the opening tag of an element
is seen.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="structfield"><code>end_element</code></em>&#160;()</span></td>
<td>Callback to invoke when the closing tag of an element is seen
</td>
</tr>
<tr>
<td>
<span class="term"><em class="structfield"><code>text</code></em>&#160;()</span></td>
<td>Callback to invoke when some text is seen (text is always
inside an element)
</td>
</tr>
<tr>
<td>
<span class="term"><em class="structfield"><code>passthrough</code></em>&#160;()</span></td>
<td>Callback to invoke for comments, processing
instructions and doctype declarations; if you're re-writing the parsed document, write the
passthrough text back out in the same position
</td>
</tr>
<tr>
<td>
<span class="term"><em class="structfield"><code>error</code></em>&#160;()</span></td>
<td>Callback to invoke when an error occurs

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3076166"></a><h3>
<a name="g-markup-escape-text"></a>g_markup_escape_text ()</h3>
<a class="indexterm" name="id3076177"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gchar">gchar</a>*      g_markup_escape_text            (const <a href="glib-Basic-Types.html#gchar">gchar</a> *text,
                                             <a href="glib-Basic-Types.html#gssize">gssize</a> length);</pre>
<p>
Escapes text so that the markup parser will parse it verbatim.
Less than, greater than, ampersand, etc. are replaced with the
corresponding entities. This function would typically be used
when writing out a file to be parsed with the markup parser.
</p>
<p>
Note that this function doesn't protect whitespace and line endings
from being processed according to the XML rules for normalization
of line endings and attribute values.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>text</code></em>&#160;:</span></td>
<td> some valid UTF-8 text
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>length</code></em>&#160;:</span></td>
<td> length of <em class="parameter"><code>text</code></em> in bytes
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> escaped text
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3076275"></a><h3>
<a name="g-markup-printf-escaped"></a>g_markup_printf_escaped ()</h3>
<a class="indexterm" name="id3076286"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gchar">gchar</a>*      g_markup_printf_escaped         (const char *format,
                                             ...);</pre>
<p>
Formats arguments according to <em class="parameter"><code>format</code></em>, escaping
all string and character arguments in the fashion
of <a href="glib-Simple-XML-Subset-Parser.html#g-markup-escape-text"><code class="function">g_markup_escape_text()</code></a>. This is useful when you
want to insert literal strings into XML-style markup
output, without having to worry that the strings
might themselves contain markup.
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
const char *store = "Fortnum &amp; Mason";
const char *item = "Tea";
char *output;
&#160;
output = g_markup_printf_escaped ("&lt;purchase&gt;"
                                  "&lt;store&gt;%s&lt;/store&gt;"
                                  "&lt;item&gt;%s&lt;/item&gt;"
                                  "&lt;/purchase&gt;",
                                  store, item);
</pre></div>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>format</code></em>&#160;:</span></td>
<td> <code class="function">printf()</code> style format string
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>...</code></em>&#160;:</span></td>
<td> the arguments to insert in the format string
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> newly allocated result from formatting
 operation. Free with <a href="glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a>.

</td>
</tr>
</tbody>
</table></div>
<p>Since  2.4
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3076425"></a><h3>
<a name="g-markup-vprintf-escaped"></a>g_markup_vprintf_escaped ()</h3>
<a class="indexterm" name="id3076436"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gchar">gchar</a>*      g_markup_vprintf_escaped        (const char *format,
                                             va_list args);</pre>
<p>
Formats the data in <em class="parameter"><code>args</code></em> according to <em class="parameter"><code>format</code></em>, escaping
all string and character arguments in the fashion
of <a href="glib-Simple-XML-Subset-Parser.html#g-markup-escape-text"><code class="function">g_markup_escape_text()</code></a>. See <a href="glib-Simple-XML-Subset-Parser.html#g-markup-printf-escaped"><code class="function">g_markup_printf_escaped()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>format</code></em>&#160;:</span></td>
<td> <code class="function">printf()</code> style format string
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>args</code></em>&#160;:</span></td>
<td> variable argument list, similar to <code class="function">vprintf()</code>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> newly allocated result from formatting
 operation. Free with <a href="glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a>.

</td>
</tr>
</tbody>
</table></div>
<p>Since  2.4
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3076589"></a><h3>
<a name="g-markup-parse-context-end-parse"></a>g_markup_parse_context_end_parse ()</h3>
<a class="indexterm" name="id3076600"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gboolean">gboolean</a>    g_markup_parse_context_end_parse
                                            (<a href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext">GMarkupParseContext</a> *context,