## GContentType

GContentType — Platform-specific content typing

## Synopsis

    #include <gio/gio.h>

    gboolean            g_content_type_equals               (const char *type1,
                                                             const char *type2);
    gboolean            g_content_type_is_a                 (const char *type,
                                                             const char *supertype);
    gboolean            g_content_type_is_unknown           (const char *type);
    char*               g_content_type_get_description      (const char *type);
    char*               g_content_type_get_mime_type        (const char *type);
    GIcon*              g_content_type_get_icon             (const char *type);
    gboolean            g_content_type_can_be_executable    (const char *type);
    char*               g_content_type_guess                (const char *filename,
                                                             const guchar *data,
                                                             gsize data_size,
                                                             gboolean *result_uncertain);
    GList*              g_content_types_get_registered      (void);

## Description

A content type is a platform specific string that defines the type of a file. On unix it is a mime type, on win32 it is an extension string like ".doc", ".txt" or a percieved string like "audio". Such strings can be looked up in the registry at HKEY_CLASSES_ROOT.

## Details

### g_content_type_equals ()

    gboolean            g_content_type_equals               (const char *type1,
                                                             const char *type2);

Compares two content types for equality.

`type1` : | a content type string.
`type2` : | a content type string.
Returns : | `TRUE` if the two strings are identical or equivalent, `FALSE` otherwise.

### g_content_type_is_a ()

    gboolean            g_content_type_is_a                 (const char *type,
                                                             const char *supertype);

Determines if `type` is a subset of `supertype`.

`type` : | a content type string.
`supertype` : | a string.
Returns : | `TRUE` if `type` is a kind of `supertype`, `FALSE` otherwise.

### g_content_type_is_unknown ()

    gboolean            g_content_type_is_unknown           (const char *type);

Checks if the content type is the generic "unknown" type. On unix this is the "application/octet-stream" mimetype, while on win32 it is "*".

`type` : | a content type string.
Returns : | `TRUE` if the type is the unknown type.

### g_content_type_get_description ()

    char*               g_content_type_get_description      (const char *type);

Gets the human readable description of the content type.

`type` : | a content type string.
Returns : | a short description of the content type `type`.

### g_content_type_get_mime_type ()

    char*               g_content_type_get_mime_type        (const char *type);

Gets the mime-type for the content type. If one is registered

`type` : | a content type string.
Returns : | the registered mime-type for the given `type`, or NULL if unknown.

### g_content_type_get_icon ()

    GIcon*              g_content_type_get_icon             (const char *type);

Gets the icon for a content type.

`type` : | a content type string.
Returns : | GIcon corresponding to the content type.

### g_content_type_can_be_executable ()

    gboolean            g_content_type_can_be_executable    (const char *type);

Checks if a content type can be executable. Note that for instance things like text files can be executables (i.e. scripts and batch files).

`type` : | a content type string.
Returns : | `TRUE` if the file type corresponds to a type that can be executable, `FALSE` otherwise.

### g_content_type_guess ()

    char*               g_content_type_guess                (const char *filename,
                                                             const guchar *data,
                                                             gsize data_size,
                                                             gboolean *result_uncertain);

Guesses the content type based on example data. If the function is uncertain, `result_uncertain` will be set to `TRUE`.

`filename` : | a string.
`data` : | a stream of data.
`data_size` : | the size of `data`.
`result_uncertain` : | a flag indicating the certainty of the result.
Returns : | a string indicating a guessed content type for the given data.

### g_content_types_get_registered ()

    GList*              g_content_types_get_registered      (void);

Gets a list of strings containing all the registered content types known to the system. The list and its data should be freed using `g_list_foreach`(list, g_free, NULL) and `g_list_free`(list)

Returns : | GList of the registered content types.