enum GMarkupError

typedef enum
{
  G_MARKUP_ERROR_BAD_UTF8,
  G_MARKUP_ERROR_EMPTY,
  G_MARKUP_ERROR_PARSE,
  /* These three are primarily intended for specific GMarkupParser
   * implementations to set.
   */
  G_MARKUP_ERROR_UNKNOWN_ELEMENT,
  G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
  G_MARKUP_ERROR_INVALID_CONTENT
} GMarkupError;

Error codes returned by markup parsing.

G_MARKUP_ERROR

#define G_MARKUP_ERROR g_markup_error_quark ()

Error domain for markup parsing. Errors in this domain will be from the GMarkupError enumeration. See GError for information on error domains.

enum GMarkupParseFlags

typedef enum
{
  /* Hmm, can't think of any at the moment */
  G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG = 1 << 0
  
} GMarkupParseFlags;

There are no flags right now. Pass "0" for the flags argument to all functions.

GMarkupParseContext

typedef struct _GMarkupParseContext GMarkupParseContext;

A parse context is used to parse a stream of bytes that you expect to contain marked-up text. See g_markup_parse_context_new(), GMarkupParser, and so on for more details.

GMarkupParser

typedef struct {
  /* Called for open tags <foo bar="baz"> */
  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 </foo> */
  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;

Any of the fields in GMarkupParser can be NULL, in which case they will be ignored. Except for the error function, any of these callbacks can set an error; in particular the G_MARKUP_ERROR_UNKNOWN_ELEMENT, G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE, and G_MARKUP_ERROR_INVALID_CONTENT errors are intended to be set from these callbacks. If you set an error from a callback, g_markup_parse_context_parse() will report that error back to its caller.

g_markup_escape_text ()

gchar*      g_markup_escape_text            (const gchar *text,
                                             gssize length);

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.

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.

g_markup_printf_escaped ()

gchar*      g_markup_printf_escaped         (const char *format,
                                             ...);

Formats arguments according to format, escaping all string and character arguments in the fashion of g_markup_escape_text(). 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.

const char *store = "Fortnum & Mason";
const char *item = "Tea";
char *output;
 
output = g_markup_printf_escaped ("<purchase>"
                                  "<store>%s</store>"
                                  "<item>%s</item>"
                                  "</purchase>",
                                  store, item);

Since 2.4

g_markup_vprintf_escaped ()

gchar*      g_markup_vprintf_escaped        (const char *format,
                                             va_list args);

Formats the data in args according to format, escaping all string and character arguments in the fashion of g_markup_escape_text(). See g_markup_printf_escaped().

Since 2.4

g_markup_parse_context_end_parse ()

gboolean    g_markup_parse_context_end_parse
                                            (GMarkupParseContext *context,
                                             GError **error);

Signals to the GMarkupParseContext that all data has been fed into the parse context with g_markup_parse_context_parse(). This function reports an error if the document isn't complete, for example if elements are still open.

g_markup_parse_context_free ()

void        g_markup_parse_context_free     (GMarkupParseContext *context);

Frees a GMarkupParseContext. Can't be called from inside one of the GMarkupParser functions.

g_markup_parse_context_get_position ()

void        g_markup_parse_context_get_position
                                            (GMarkupParseContext *context,
                                             gint *line_number,
                                             gint *char_number);

Retrieves the current line number and the number of the character on that line. Intended for use in error messages; there are no strict semantics for what constitutes the "current" line number other than "the best number we could come up with for error messages."

g_markup_parse_context_get_element ()

const gchar* g_markup_parse_context_get_element
                                            (GMarkupParseContext *context);

Retrieves the name of the currently open element.

Since 2.2

g_markup_parse_context_new ()

GMarkupParseContext* g_markup_parse_context_new
                                            (const GMarkupParser *parser,
                                             GMarkupParseFlags flags,
                                             gpointer user_data,
                                             GDestroyNotify user_data_dnotify);

Creates a new parse context. A parse context is used to parse marked-up documents. You can feed any number of documents into a context, as long as no errors occur; once an error occurs, the parse context can't continue to parse text (you have to free it and create a new parse context).

g_markup_parse_context_parse ()

gboolean    g_markup_parse_context_parse    (GMarkupParseContext *context,
                                             const gchar *text,
                                             gssize text_len,
                                             GError **error);

Feed some data to the GMarkupParseContext. The data need not be valid UTF-8; an error will be signaled if it's invalid. The data need not be an entire document; you can feed a document into the parser incrementally, via multiple calls to this function. Typically, as you receive data from a network connection or file, you feed each received chunk of data into this function, aborting the process if an error occurs. Once an error is reported, no further data may be fed to the GMarkupParseContext; all errors are fatal.