GObject Introspection Reference Manual: GIBaseInfo

## GIBaseInfo GIBaseInfo — Base struct for all GITypelib structs |

## Functions

GIBaseInfo * | g_info_new ()
GIBaseInfo * | g_base_info_ref ()
void | g_base_info_unref ()
gboolean | g_base_info_equal ()
GIInfoType | g_base_info_get_type ()
GITypelib * | g_base_info_get_typelib ()
const gchar * | g_base_info_get_namespace ()
const gchar * | g_base_info_get_name ()
const gchar * | g_base_info_get_attribute ()
gboolean | g_base_info_iterate_attributes ()
GIBaseInfo * | g_base_info_get_container ()
gboolean | g_base_info_is_deprecated ()

## Types and Values

enum | GIInfoType
| GIAttributeIter

## Description

GIBaseInfo is the common base struct of all other *Info structs accessible through the GIRepository API. All other structs can be casted to a GIBaseInfo, for instance:

Example 1. Casting a GIFunctionInfo to GIBaseInfo

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    GIFunctionInfo *function_info = ...;
    GIBaseInfo *info = (GIBaseInfo*)function_info;

Most GIRepository APIs returning a GIBaseInfo is actually creating a new struct, in other words, `g_base_info_unref()` has to be called when done accessing the data. GIBaseInfos are normally accessed by calling either `g_irepository_find_by_name()`, `g_irepository_find_by_gtype()` or `g_irepository_get_info()`.

Example 2. Getting the Button of the Gtk typelib

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    GIBaseInfo *button_info = g_irepository_find_by_name(NULL, "Gtk", "Button");
    ... use button_info ...
    g_base_info_unref(button_info);

## Struct hierarchy

      GIBaseInfo
       +----GIArgInfo
       +----GICallableInfo
       +----GIConstantInfo
       +----GIFieldInfo
       +----GIPropertyInfo
       +----GIRegisteredTypeInfo
       +----GITypeInfo

## Functions

### g_info_new ()

    GIBaseInfo *
    g_info_new (GIInfoType type,
                GIBaseInfo *container,
                GITypelib *typelib,
                guint32 offset);

TODO

#### Parameters

type | TODO |
container | TODO |
typelib | TODO |
offset | TODO |

#### Returns

TODO

### g_base_info_ref ()

    GIBaseInfo *
    g_base_info_ref (GIBaseInfo *info);

Increases the reference count of `info` .

#### Parameters

info | a GIBaseInfo |

#### Returns

the same `info` .

### g_base_info_unref ()

    void
    g_base_info_unref (GIBaseInfo *info);

Decreases the reference count of `info` . When its reference count drops to 0, the info is freed.

#### Parameters

info | a GIBaseInfo |

### g_base_info_equal ()

    gboolean
    g_base_info_equal (GIBaseInfo *info1,
                       GIBaseInfo *info2);

Compare two GIBaseInfo.

Using pointer comparison is not practical since many functions return different instances of GIBaseInfo that refers to the same part of the TypeLib; use this function instead to do GIBaseInfo comparisons.

#### Parameters

info1 | a GIBaseInfo |
info2 | a GIBaseInfo |

#### Returns

`TRUE` if and only if `info1` equals `info2` .

### g_base_info_get_type ()

    GIInfoType
    g_base_info_get_type (GIBaseInfo *info);

Obtain the info type of the GIBaseInfo.

#### Parameters

info | a GIBaseInfo |

#### Returns

the info type of `info`

### g_base_info_get_typelib ()

    GITypelib *
    g_base_info_get_typelib (GIBaseInfo *info);

Obtain the typelib this `info` belongs to

#### Parameters

info | a GIBaseInfo |

#### Returns

the typelib.

[transfer none]

### g_base_info_get_namespace ()

    const gchar *
    g_base_info_get_namespace (GIBaseInfo *info);

Obtain the namespace of `info` .

#### Parameters

info | a GIBaseInfo |

#### Returns

the namespace

### g_base_info_get_name ()

    const gchar *
    g_base_info_get_name (GIBaseInfo *info);

Obtain the name of the `info` . What the name represents depends on the GIInfoType of the `info` . For instance for GIFunctionInfo it is the name of the function.

#### Parameters

info | a GIBaseInfo |

#### Returns

the name of `info` or `NULL` if it lacks a name.

### g_base_info_get_attribute ()

    const gchar *
    g_base_info_get_attribute (GIBaseInfo *info,
                               const gchar *name);

Retrieve an arbitrary attribute associated with this node.

#### Parameters

info | a GIBaseInfo |
name | a freeform string naming an attribute |

#### Returns

The value of the attribute, or `NULL` if no such attribute exists

### g_base_info_iterate_attributes ()

    gboolean
    g_base_info_iterate_attributes (GIBaseInfo *info,
                                    GIAttributeIter *iterator,
                                    char **name,
                                    char **value);

Iterate over all attributes associated with this node. The iterator structure is typically stack allocated, and must have its first member initialized to `NULL`. Attributes are arbitrary namespaced key–value pairs which can be attached to almost any item. They are intended for use by software higher in the toolchain than bindings, and are distinct from normal GIR annotations.

Both the `name` and `value` should be treated as constants and must not be freed.

Example 3. Iterating over attributes

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    void
    print_attributes (GIBaseInfo *info)
    {
      GIAttributeIter iter = { 0, };
      char *name;
      char *value;
      while (g_base_info_iterate_attributes (info, &iter, &name, &value))
        {
          g_print ("attribute name: %s value: %s", name, value);
        }
    }

#### Parameters

info | a GIBaseInfo |
iterator | a GIAttributeIter structure, must be initialized; see below |
name | Returned name, must not be freed. | [out][transfer none]
value | Returned name, must not be freed. | [out][transfer none]

#### Returns

`TRUE` if there are more attributes

### g_base_info_get_container ()

    GIBaseInfo *
    g_base_info_get_container (GIBaseInfo *info);

Obtain the container of the `info` . The container is the parent GIBaseInfo. For instance, the parent of a GIFunctionInfo is an GIObjectInfo or GIInterfaceInfo.

#### Parameters

info | a GIBaseInfo |

#### Returns

the container.

[transfer none]

### g_base_info_is_deprecated ()

    gboolean
    g_base_info_is_deprecated (GIBaseInfo *info);

Obtain whether the `info` is represents a metadata which is deprecated or not.

#### Parameters

info | a GIBaseInfo |

#### Returns

`TRUE` if deprecated

## Types and Values

### enum GIInfoType

The type of a GIBaseInfo struct.

#### Members

GI_INFO_TYPE_INVALID | invalid type |
GI_INFO_TYPE_FUNCTION | function, see GIFunctionInfo |
GI_INFO_TYPE_CALLBACK | callback, see GIFunctionInfo |
GI_INFO_TYPE_STRUCT | struct, see GIStructInfo |
GI_INFO_TYPE_BOXED | boxed, see GIStructInfo or GIUnionInfo |
GI_INFO_TYPE_ENUM | enum, see GIEnumInfo |
GI_INFO_TYPE_FLAGS | flags, see GIEnumInfo |
GI_INFO_TYPE_OBJECT | object, see GIObjectInfo |
GI_INFO_TYPE_INTERFACE | interface, see GIInterfaceInfo |
GI_INFO_TYPE_CONSTANT | contant, see GIConstantInfo |
GI_INFO_TYPE_INVALID_0 | deleted, used to be GI_INFO_TYPE_ERROR_DOMAIN. |
GI_INFO_TYPE_UNION | union, see GIUnionInfo |
GI_INFO_TYPE_VALUE | enum value, see GIValueInfo |
GI_INFO_TYPE_SIGNAL | signal, see GISignalInfo |
GI_INFO_TYPE_VFUNC | virtual function, see GIVFuncInfo |
GI_INFO_TYPE_PROPERTY | GObject property, see GIPropertyInfo |
GI_INFO_TYPE_FIELD | struct or union field, see GIFieldInfo |
GI_INFO_TYPE_ARG | argument of a function or callback, see GIArgInfo |
GI_INFO_TYPE_TYPE | type information, see GITypeInfo |
GI_INFO_TYPE_UNRESOLVED | unresolved type, a type which is not present in the typelib, or any of its dependencies. |

### GIAttributeIter

    typedef struct {
    } GIAttributeIter;

An opaque structure used to iterate over attributes in a GIBaseInfo struct.