## Value arrays

Value arrays — A container structure to maintain an array of generic values

## Synopsis

    #include <glib-object.h>

    struct      GValueArray;
    GValue*     g_value_array_get_nth           (GValueArray *value_array,
                                                 guint index_);
    GValueArray* g_value_array_new              (guint n_prealloced);
    GValueArray* g_value_array_copy             (const GValueArray *value_array);
    void        g_value_array_free              (GValueArray *value_array);
    GValueArray* g_value_array_append           (GValueArray *value_array,
                                                 const GValue *value);
    GValueArray* g_value_array_prepend          (GValueArray *value_array,
                                                 const GValue *value);
    GValueArray* g_value_array_insert           (GValueArray *value_array,
                                                 guint index_,
                                                 const GValue *value);
    GValueArray* g_value_array_remove           (GValueArray *value_array,
                                                 guint index_);
    GValueArray* g_value_array_sort             (GValueArray *value_array,
                                                 GCompareFunc compare_func);
    GValueArray* g_value_array_sort_with_data   (GValueArray *value_array,
                                                 GCompareDataFunc compare_func,
                                                 gpointer user_data);

## Description

The prime purpose of a GValueArray is for it to be used as an object property that holds an array of values. A GValueArray wraps an array of GValue elements in order for it to be used as a boxed type through `G_TYPE_VALUE_ARRAY`.

## Details

### struct GValueArray

    struct GValueArray {

      guint   n_values;
      GValue *values;

    };

A GValueArray contains an array of GValue elements.

guint `n_values` | number of values contained in the array
GValue *`values` | array of values

### g_value_array_get_nth ()

    GValue*     g_value_array_get_nth           (GValueArray *value_array,
                                                 guint index_);

Return a pointer to the value at `index_` containd in `value_array`.

`value_array` : | GValueArray to get a value from
`index_` : | index of the value of interest
Returns : | pointer to a value at `index_` in `value_array`

### g_value_array_new ()

    GValueArray* g_value_array_new              (guint n_prealloced);

Allocate and initialize a new GValueArray, optionally preserve space for `n_prealloced` elements. New arrays always contain 0 elements, regardless of the value of `n_prealloced`.

`n_prealloced` : | number of values to preallocate space for
Returns : | a newly allocated GValueArray with 0 values

### g_value_array_copy ()

    GValueArray* g_value_array_copy             (const GValueArray *value_array);

Construct an exact copy of a GValueArray by duplicating all its contents.

`value_array` : | GValueArray to copy
Returns : | Newly allocated copy of GValueArray

### g_value_array_free ()

    void        g_value_array_free              (GValueArray *value_array);

Free a GValueArray including its contents.

`value_array` : |

### g_value_array_append ()

    GValueArray* g_value_array_append           (GValueArray *value_array,
                                                 const GValue *value);

Insert a copy of `value` as last element of `value_array`.

`value_array` : | GValueArray to add an element to
`value` : | GValue to copy into GValueArray
Returns : | the GValueArray passed in as `value_array`

### g_value_array_prepend ()

    GValueArray* g_value_array_prepend          (GValueArray *value_array,
                                                 const GValue *value);

Insert a copy of `value` as first element of `value_array`.

`value_array` : | GValueArray to add an element to
`value` : | GValue to copy into GValueArray
Returns : | the GValueArray passed in as `value_array`

### g_value_array_insert ()

    GValueArray* g_value_array_insert           (GValueArray *value_array,
                                                 guint index_,
                                                 const GValue *value);

Insert a copy of `value` at specified position into `value_array`.

`value_array` : | GValueArray to add an element to
`index_` : | insertion position, must be <= value_array->n_values
`value` : | GValue to copy into GValueArray
Returns : | the GValueArray passed in as `value_array`

### g_value_array_remove ()

    GValueArray* g_value_array_remove           (GValueArray *value_array,
                                                 guint index_);

Remove the value at position `index_` from `value_array`.

`value_array` : | GValueArray to remove an element from
`index_` : | position of value to remove, must be < value_array->n_values
Returns : | the GValueArray passed in as `value_array`

### g_value_array_sort ()

    GValueArray* g_value_array_sort             (GValueArray *value_array,
                                                 GCompareFunc compare_func);

Sort `value_array` using `compare_func` to compare the elements accoring to the semantics of GCompareFunc.

The current implementation uses Quick-Sort as sorting algorithm.

`value_array` : | GValueArray to sort
`compare_func` : | function to compare elements
Returns : | the GValueArray passed in as `value_array`

### g_value_array_sort_with_data ()

    GValueArray* g_value_array_sort_with_data   (GValueArray *value_array,
                                                 GCompareDataFunc compare_func,
                                                 gpointer user_data);

Sort `value_array` using `compare_func` to compare the elements accoring to the semantics of GCompareDataFunc.

The current implementation uses Quick-Sort as sorting algorithm.

`value_array` : | GValueArray to sort
`compare_func` : | function to compare elements
`user_data` : | extra data argument provided for `compare_func`
Returns : | the GValueArray passed in as `value_array`

## See Also

GValue, GParamSpecValueArray, `g_param_spec_value_array()`