mirror of https://gitee.com/openkylin/glib2.0.git
3022 lines
86 KiB
C
3022 lines
86 KiB
C
/* GLIB - Library of useful routines for C programming
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||
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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||
* This library is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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||
*
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||
* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/*
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* MT safe
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*/
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#include "config.h"
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#include <string.h>
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#include <stdlib.h>
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#include "garray.h"
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#include "galloca.h"
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#include "gbytes.h"
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#include "ghash.h"
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#include "gslice.h"
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#include "gmem.h"
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#include "gtestutils.h"
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#include "gthread.h"
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#include "gmessages.h"
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#include "gqsort.h"
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#include "grefcount.h"
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#include "gutilsprivate.h"
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#define MIN_ARRAY_SIZE 16
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typedef struct _GRealArray GRealArray;
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/**
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* GArray:
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* @data: a pointer to the element data. The data may be moved as
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* elements are added to the #GArray.
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||
* @len: the number of elements in the #GArray not including the
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* possible terminating zero element.
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*
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* Contains the public fields of a GArray.
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*/
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struct _GRealArray
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{
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guint8 *data;
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guint len;
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guint elt_capacity;
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guint elt_size;
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guint zero_terminated : 1;
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guint clear : 1;
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gatomicrefcount ref_count;
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GDestroyNotify clear_func;
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};
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/**
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* g_array_index:
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* @a: a #GArray
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* @t: the type of the elements
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* @i: the index of the element to return
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*
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* Returns the element of a #GArray at the given index. The return
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* value is cast to the given type. This is the main way to read or write an
|
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* element in a #GArray.
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*
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* Writing an element is typically done by reference, as in the following
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* example. This example gets a pointer to an element in a #GArray, and then
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* writes to a field in it:
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* |[<!-- language="C" -->
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* EDayViewEvent *event;
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* // This gets a pointer to the 4th element in the array of
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* // EDayViewEvent structs.
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* event = &g_array_index (events, EDayViewEvent, 3);
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* event->start_time = g_get_current_time ();
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* ]|
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*
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* This example reads from and writes to an array of integers:
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* |[<!-- language="C" -->
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* g_autoptr(GArray) int_array = g_array_new (FALSE, FALSE, sizeof (guint));
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* for (guint i = 0; i < 10; i++)
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* g_array_append_val (int_array, i);
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*
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* guint *my_int = &g_array_index (int_array, guint, 1);
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* g_print ("Int at index 1 is %u; decrementing it\n", *my_int);
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* *my_int = *my_int - 1;
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* ]|
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*
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* Returns: the element of the #GArray at the index given by @i
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*/
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#define g_array_elt_len(array,i) ((gsize)(array)->elt_size * (i))
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#define g_array_elt_pos(array,i) ((array)->data + g_array_elt_len((array),(i)))
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#define g_array_elt_zero(array, pos, len) \
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(memset (g_array_elt_pos ((array), pos), 0, g_array_elt_len ((array), len)))
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#define g_array_zero_terminate(array) G_STMT_START{ \
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if ((array)->zero_terminated) \
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g_array_elt_zero ((array), (array)->len, 1); \
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||
}G_STMT_END
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static void g_array_maybe_expand (GRealArray *array,
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guint len);
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/**
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* g_array_new:
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* @zero_terminated: %TRUE if the array should have an extra element at
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* the end which is set to 0
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* @clear_: %TRUE if #GArray elements should be automatically cleared
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* to 0 when they are allocated
|
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* @element_size: the size of each element in bytes
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*
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* Creates a new #GArray with a reference count of 1.
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*
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* Returns: the new #GArray
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||
*/
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GArray*
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g_array_new (gboolean zero_terminated,
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gboolean clear,
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guint elt_size)
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{
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g_return_val_if_fail (elt_size > 0, NULL);
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#if (UINT_WIDTH / 8) >= GLIB_SIZEOF_SIZE_T
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g_return_val_if_fail (elt_size <= G_MAXSIZE / 2 - 1, NULL);
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#endif
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return g_array_sized_new (zero_terminated, clear, elt_size, 0);
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}
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/**
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* g_array_new_take: (skip)
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* @data: (array length=len) (transfer full) (nullable): an array of
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* elements of @element_size, or %NULL for an empty array
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* @len: the number of elements in @data
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* @clear: %TRUE if #GArray elements should be automatically cleared
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* to 0 when they are allocated
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* @element_size: the size of each element in bytes
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*
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* Creates a new #GArray with @data as array data, @len as length and a
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* reference count of 1.
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*
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* This avoids having to copy the data manually, when it can just be
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* inherited.
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* After this call, @data belongs to the #GArray and may no longer be
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* modified by the caller. The memory of @data has to be dynamically
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* allocated and will eventually be freed with g_free().
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*
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||
* In case the elements need to be cleared when the array is freed, use
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* g_array_set_clear_func() to set a #GDestroyNotify function to perform
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* such task.
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||
*
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||
* Do not use it if @len or @element_size are greater than %G_MAXUINT.
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||
* #GArray stores the length of its data in #guint, which may be shorter
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* than #gsize.
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*
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* Returns: (transfer full): A new #GArray
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*
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* Since: 2.76
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*/
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GArray *
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g_array_new_take (gpointer data,
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gsize len,
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gboolean clear,
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gsize element_size)
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{
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GRealArray *rarray;
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GArray *array;
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g_return_val_if_fail (data != NULL || len == 0, NULL);
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g_return_val_if_fail (len <= G_MAXUINT, NULL);
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g_return_val_if_fail (element_size <= G_MAXUINT, NULL);
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array = g_array_sized_new (FALSE, clear, element_size, 0);
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rarray = (GRealArray *) array;
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rarray->data = (guint8 *) g_steal_pointer (&data);
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||
rarray->len = len;
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||
rarray->elt_capacity = len;
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||
return array;
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||
}
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/**
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* g_array_new_take_zero_terminated: (skip)
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* @data: (array zero-terminated=1): an array of elements of @element_size
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* @clear: %TRUE if #GArray elements should be automatically cleared
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||
* to 0 when they are allocated
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||
* @element_size: the size of each element in bytes
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||
*
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||
* Creates a new #GArray with @data as array data, computing the length of it
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||
* and setting the reference count to 1.
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||
*
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||
* This avoids having to copy the data manually, when it can just be
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||
* inherited.
|
||
* After this call, @data belongs to the #GArray and may no longer be
|
||
* modified by the caller. The memory of @data has to be dynamically
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||
* allocated and will eventually be freed with g_free().
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||
*
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||
* The length is calculated by iterating through @data until the first %NULL
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* element is found.
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*
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||
* In case the elements need to be cleared when the array is freed, use
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* g_array_set_clear_func() to set a #GDestroyNotify function to perform
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* such task.
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*
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* Do not use it if @data length or @element_size are greater than %G_MAXUINT.
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* #GArray stores the length of its data in #guint, which may be shorter
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* than #gsize.
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||
*
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* Returns: (transfer full): A new #GArray
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||
*
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||
* Since: 2.76
|
||
*/
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||
GArray *
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g_array_new_take_zero_terminated (gpointer data,
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gboolean clear,
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gsize element_size)
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{
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GArray *array;
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gsize len = 0;
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g_return_val_if_fail (element_size <= G_MAXUINT, NULL);
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if (data != NULL)
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{
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guint8 *array_data = data;
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for (gsize i = 0; ; ++i)
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{
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const guint8 *element_start = array_data + (i * element_size);
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if (*element_start == 0 &&
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memcmp (element_start, element_start + 1, element_size - 1) == 0)
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break;
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len += 1;
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}
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}
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g_return_val_if_fail (len <= G_MAXUINT, NULL);
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array = g_array_new_take (data, len, clear, element_size);
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((GRealArray *)array)->zero_terminated = TRUE;
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return array;
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||
}
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/**
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||
* g_array_steal:
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||
* @array: a #GArray.
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||
* @len: (optional) (out): pointer to retrieve the number of
|
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* elements of the original array
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*
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* Frees the data in the array and resets the size to zero, while
|
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* the underlying array is preserved for use elsewhere and returned
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* to the caller.
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||
*
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* If the array was created with the @zero_terminate property
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* set to %TRUE, the returned data is zero terminated too.
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*
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* If array elements contain dynamically-allocated memory,
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* the array elements should also be freed by the caller.
|
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*
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||
* A short example of use:
|
||
* |[<!-- language="C" -->
|
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* ...
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* gpointer data;
|
||
* gsize data_len;
|
||
* data = g_array_steal (some_array, &data_len);
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* ...
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* ]|
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||
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* Returns: (transfer full): the element data, which should be
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* freed using g_free().
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*
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* Since: 2.64
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*/
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gpointer
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g_array_steal (GArray *array,
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gsize *len)
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{
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GRealArray *rarray;
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gpointer segment;
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g_return_val_if_fail (array != NULL, NULL);
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rarray = (GRealArray *) array;
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segment = (gpointer) rarray->data;
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if (len != NULL)
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*len = rarray->len;
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rarray->data = NULL;
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rarray->len = 0;
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rarray->elt_capacity = 0;
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return segment;
|
||
}
|
||
|
||
/**
|
||
* g_array_sized_new:
|
||
* @zero_terminated: %TRUE if the array should have an extra element at
|
||
* the end with all bits cleared
|
||
* @clear_: %TRUE if all bits in the array should be cleared to 0 on
|
||
* allocation
|
||
* @element_size: size of each element in the array
|
||
* @reserved_size: number of elements preallocated
|
||
*
|
||
* Creates a new #GArray with @reserved_size elements preallocated and
|
||
* a reference count of 1. This avoids frequent reallocation, if you
|
||
* are going to add many elements to the array. Note however that the
|
||
* size of the array is still 0.
|
||
*
|
||
* Returns: the new #GArray
|
||
*/
|
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GArray*
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g_array_sized_new (gboolean zero_terminated,
|
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gboolean clear,
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||
guint elt_size,
|
||
guint reserved_size)
|
||
{
|
||
GRealArray *array;
|
||
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||
g_return_val_if_fail (elt_size > 0, NULL);
|
||
#if (UINT_WIDTH / 8) >= GLIB_SIZEOF_SIZE_T
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g_return_val_if_fail (elt_size <= G_MAXSIZE / 2 - 1, NULL);
|
||
#endif
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||
|
||
array = g_slice_new (GRealArray);
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||
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array->data = NULL;
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||
array->len = 0;
|
||
array->elt_capacity = 0;
|
||
array->zero_terminated = (zero_terminated ? 1 : 0);
|
||
array->clear = (clear ? 1 : 0);
|
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array->elt_size = elt_size;
|
||
array->clear_func = NULL;
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||
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g_atomic_ref_count_init (&array->ref_count);
|
||
|
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if (array->zero_terminated || reserved_size != 0)
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{
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g_array_maybe_expand (array, reserved_size);
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g_assert (array->data != NULL);
|
||
g_array_zero_terminate (array);
|
||
}
|
||
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||
return (GArray*) array;
|
||
}
|
||
|
||
/**
|
||
* g_array_set_clear_func:
|
||
* @array: A #GArray
|
||
* @clear_func: a function to clear an element of @array
|
||
*
|
||
* Sets a function to clear an element of @array.
|
||
*
|
||
* The @clear_func will be called when an element in the array
|
||
* data segment is removed and when the array is freed and data
|
||
* segment is deallocated as well. @clear_func will be passed a
|
||
* pointer to the element to clear, rather than the element itself.
|
||
*
|
||
* Note that in contrast with other uses of #GDestroyNotify
|
||
* functions, @clear_func is expected to clear the contents of
|
||
* the array element it is given, but not free the element itself.
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct
|
||
* {
|
||
* gchar *str;
|
||
* GObject *obj;
|
||
* } ArrayElement;
|
||
*
|
||
* static void
|
||
* array_element_clear (ArrayElement *element)
|
||
* {
|
||
* g_clear_pointer (&element->str, g_free);
|
||
* g_clear_object (&element->obj);
|
||
* }
|
||
*
|
||
* // main code
|
||
* GArray *garray = g_array_new (FALSE, FALSE, sizeof (ArrayElement));
|
||
* g_array_set_clear_func (garray, (GDestroyNotify) array_element_clear);
|
||
* // assign data to the structure
|
||
* g_array_free (garray, TRUE);
|
||
* ]|
|
||
*
|
||
* Since: 2.32
|
||
*/
|
||
void
|
||
g_array_set_clear_func (GArray *array,
|
||
GDestroyNotify clear_func)
|
||
{
|
||
GRealArray *rarray = (GRealArray *) array;
|
||
|
||
g_return_if_fail (array != NULL);
|
||
|
||
rarray->clear_func = clear_func;
|
||
}
|
||
|
||
/**
|
||
* g_array_ref:
|
||
* @array: A #GArray
|
||
*
|
||
* Atomically increments the reference count of @array by one.
|
||
* This function is thread-safe and may be called from any thread.
|
||
*
|
||
* Returns: The passed in #GArray
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
GArray *
|
||
g_array_ref (GArray *array)
|
||
{
|
||
GRealArray *rarray = (GRealArray*) array;
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
g_atomic_ref_count_inc (&rarray->ref_count);
|
||
|
||
return array;
|
||
}
|
||
|
||
typedef enum
|
||
{
|
||
FREE_SEGMENT = 1 << 0,
|
||
PRESERVE_WRAPPER = 1 << 1
|
||
} ArrayFreeFlags;
|
||
|
||
static gchar *array_free (GRealArray *, ArrayFreeFlags);
|
||
|
||
/**
|
||
* g_array_unref:
|
||
* @array: A #GArray
|
||
*
|
||
* Atomically decrements the reference count of @array by one. If the
|
||
* reference count drops to 0, all memory allocated by the array is
|
||
* released. This function is thread-safe and may be called from any
|
||
* thread.
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
void
|
||
g_array_unref (GArray *array)
|
||
{
|
||
GRealArray *rarray = (GRealArray*) array;
|
||
g_return_if_fail (array);
|
||
|
||
if (g_atomic_ref_count_dec (&rarray->ref_count))
|
||
array_free (rarray, FREE_SEGMENT);
|
||
}
|
||
|
||
/**
|
||
* g_array_get_element_size:
|
||
* @array: A #GArray
|
||
*
|
||
* Gets the size of the elements in @array.
|
||
*
|
||
* Returns: Size of each element, in bytes
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
guint
|
||
g_array_get_element_size (GArray *array)
|
||
{
|
||
GRealArray *rarray = (GRealArray*) array;
|
||
|
||
g_return_val_if_fail (array, 0);
|
||
|
||
return rarray->elt_size;
|
||
}
|
||
|
||
/**
|
||
* g_array_free:
|
||
* @array: a #GArray
|
||
* @free_segment: if %TRUE the actual element data is freed as well
|
||
*
|
||
* Frees the memory allocated for the #GArray. If @free_segment is
|
||
* %TRUE it frees the memory block holding the elements as well. Pass
|
||
* %FALSE if you want to free the #GArray wrapper but preserve the
|
||
* underlying array for use elsewhere. If the reference count of
|
||
* @array is greater than one, the #GArray wrapper is preserved but
|
||
* the size of @array will be set to zero.
|
||
*
|
||
* If array contents point to dynamically-allocated memory, they should
|
||
* be freed separately if @free_seg is %TRUE and no @clear_func
|
||
* function has been set for @array.
|
||
*
|
||
* This function is not thread-safe. If using a #GArray from multiple
|
||
* threads, use only the atomic g_array_ref() and g_array_unref()
|
||
* functions.
|
||
*
|
||
* Returns: the element data if @free_segment is %FALSE, otherwise
|
||
* %NULL. The element data should be freed using g_free().
|
||
*/
|
||
gchar*
|
||
g_array_free (GArray *farray,
|
||
gboolean free_segment)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
ArrayFreeFlags flags;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
flags = (free_segment ? FREE_SEGMENT : 0);
|
||
|
||
/* if others are holding a reference, preserve the wrapper but do free/return the data */
|
||
if (!g_atomic_ref_count_dec (&array->ref_count))
|
||
flags |= PRESERVE_WRAPPER;
|
||
|
||
return array_free (array, flags);
|
||
}
|
||
|
||
static gchar *
|
||
array_free (GRealArray *array,
|
||
ArrayFreeFlags flags)
|
||
{
|
||
gchar *segment;
|
||
|
||
if (flags & FREE_SEGMENT)
|
||
{
|
||
if (array->clear_func != NULL)
|
||
{
|
||
guint i;
|
||
|
||
for (i = 0; i < array->len; i++)
|
||
array->clear_func (g_array_elt_pos (array, i));
|
||
}
|
||
|
||
g_free (array->data);
|
||
segment = NULL;
|
||
}
|
||
else
|
||
segment = (gchar*) array->data;
|
||
|
||
if (flags & PRESERVE_WRAPPER)
|
||
{
|
||
array->data = NULL;
|
||
array->len = 0;
|
||
array->elt_capacity = 0;
|
||
}
|
||
else
|
||
{
|
||
g_slice_free1 (sizeof (GRealArray), array);
|
||
}
|
||
|
||
return segment;
|
||
}
|
||
|
||
/**
|
||
* g_array_append_vals:
|
||
* @array: a #GArray
|
||
* @data: (not nullable): a pointer to the elements to append to the end of the array
|
||
* @len: the number of elements to append
|
||
*
|
||
* Adds @len elements onto the end of the array.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
/**
|
||
* g_array_append_val:
|
||
* @a: a #GArray
|
||
* @v: the value to append to the #GArray
|
||
*
|
||
* Adds the value on to the end of the array. The array will grow in
|
||
* size automatically if necessary.
|
||
*
|
||
* g_array_append_val() is a macro which uses a reference to the value
|
||
* parameter @v. This means that you cannot use it with literal values
|
||
* such as "27". You must use variables.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_append_vals (GArray *farray,
|
||
gconstpointer data,
|
||
guint len)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
if (len == 0)
|
||
return farray;
|
||
|
||
g_array_maybe_expand (array, len);
|
||
|
||
memcpy (g_array_elt_pos (array, array->len), data,
|
||
g_array_elt_len (array, len));
|
||
|
||
array->len += len;
|
||
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_prepend_vals:
|
||
* @array: a #GArray
|
||
* @data: (nullable): a pointer to the elements to prepend to the start of the array
|
||
* @len: the number of elements to prepend, which may be zero
|
||
*
|
||
* Adds @len elements onto the start of the array.
|
||
*
|
||
* @data may be %NULL if (and only if) @len is zero. If @len is zero, this
|
||
* function is a no-op.
|
||
*
|
||
* This operation is slower than g_array_append_vals() since the
|
||
* existing elements in the array have to be moved to make space for
|
||
* the new elements.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
/**
|
||
* g_array_prepend_val:
|
||
* @a: a #GArray
|
||
* @v: the value to prepend to the #GArray
|
||
*
|
||
* Adds the value on to the start of the array. The array will grow in
|
||
* size automatically if necessary.
|
||
*
|
||
* This operation is slower than g_array_append_val() since the
|
||
* existing elements in the array have to be moved to make space for
|
||
* the new element.
|
||
*
|
||
* g_array_prepend_val() is a macro which uses a reference to the value
|
||
* parameter @v. This means that you cannot use it with literal values
|
||
* such as "27". You must use variables.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_prepend_vals (GArray *farray,
|
||
gconstpointer data,
|
||
guint len)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
if (len == 0)
|
||
return farray;
|
||
|
||
g_array_maybe_expand (array, len);
|
||
|
||
memmove (g_array_elt_pos (array, len), g_array_elt_pos (array, 0),
|
||
g_array_elt_len (array, array->len));
|
||
|
||
memcpy (g_array_elt_pos (array, 0), data, g_array_elt_len (array, len));
|
||
|
||
array->len += len;
|
||
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_insert_vals:
|
||
* @array: a #GArray
|
||
* @index_: the index to place the elements at
|
||
* @data: (nullable): a pointer to the elements to insert
|
||
* @len: the number of elements to insert
|
||
*
|
||
* Inserts @len elements into a #GArray at the given index.
|
||
*
|
||
* If @index_ is greater than the array’s current length, the array is expanded.
|
||
* The elements between the old end of the array and the newly inserted elements
|
||
* will be initialised to zero if the array was configured to clear elements;
|
||
* otherwise their values will be undefined.
|
||
*
|
||
* If @index_ is less than the array’s current length, new entries will be
|
||
* inserted into the array, and the existing entries above @index_ will be moved
|
||
* upwards.
|
||
*
|
||
* @data may be %NULL if (and only if) @len is zero. If @len is zero, this
|
||
* function is a no-op.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
/**
|
||
* g_array_insert_val:
|
||
* @a: a #GArray
|
||
* @i: the index to place the element at
|
||
* @v: the value to insert into the array
|
||
*
|
||
* Inserts an element into an array at the given index.
|
||
*
|
||
* g_array_insert_val() is a macro which uses a reference to the value
|
||
* parameter @v. This means that you cannot use it with literal values
|
||
* such as "27". You must use variables.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_insert_vals (GArray *farray,
|
||
guint index_,
|
||
gconstpointer data,
|
||
guint len)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
if (len == 0)
|
||
return farray;
|
||
|
||
/* Is the index off the end of the array, and hence do we need to over-allocate
|
||
* and clear some elements? */
|
||
if (index_ >= array->len)
|
||
{
|
||
g_array_maybe_expand (array, index_ - array->len + len);
|
||
return g_array_append_vals (g_array_set_size (farray, index_), data, len);
|
||
}
|
||
|
||
g_array_maybe_expand (array, len);
|
||
|
||
memmove (g_array_elt_pos (array, len + index_),
|
||
g_array_elt_pos (array, index_),
|
||
g_array_elt_len (array, array->len - index_));
|
||
|
||
memcpy (g_array_elt_pos (array, index_), data, g_array_elt_len (array, len));
|
||
|
||
array->len += len;
|
||
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_set_size:
|
||
* @array: a #GArray
|
||
* @length: the new size of the #GArray
|
||
*
|
||
* Sets the size of the array, expanding it if necessary. If the array
|
||
* was created with @clear_ set to %TRUE, the new elements are set to 0.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_set_size (GArray *farray,
|
||
guint length)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
if (length > array->len)
|
||
{
|
||
g_array_maybe_expand (array, length - array->len);
|
||
|
||
if (array->clear)
|
||
g_array_elt_zero (array, array->len, length - array->len);
|
||
}
|
||
else if (length < array->len)
|
||
g_array_remove_range (farray, length, array->len - length);
|
||
|
||
array->len = length;
|
||
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_remove_index:
|
||
* @array: a #GArray
|
||
* @index_: the index of the element to remove
|
||
*
|
||
* Removes the element at the given index from a #GArray. The following
|
||
* elements are moved down one place.
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_remove_index (GArray *farray,
|
||
guint index_)
|
||
{
|
||
GRealArray* array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
g_return_val_if_fail (index_ < array->len, NULL);
|
||
|
||
if (array->clear_func != NULL)
|
||
array->clear_func (g_array_elt_pos (array, index_));
|
||
|
||
if (index_ != array->len - 1)
|
||
memmove (g_array_elt_pos (array, index_),
|
||
g_array_elt_pos (array, index_ + 1),
|
||
g_array_elt_len (array, array->len - index_ - 1));
|
||
|
||
array->len -= 1;
|
||
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
g_array_elt_zero (array, array->len, 1);
|
||
else
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_remove_index_fast:
|
||
* @array: a @GArray
|
||
* @index_: the index of the element to remove
|
||
*
|
||
* Removes the element at the given index from a #GArray. The last
|
||
* element in the array is used to fill in the space, so this function
|
||
* does not preserve the order of the #GArray. But it is faster than
|
||
* g_array_remove_index().
|
||
*
|
||
* Returns: the #GArray
|
||
*/
|
||
GArray*
|
||
g_array_remove_index_fast (GArray *farray,
|
||
guint index_)
|
||
{
|
||
GRealArray* array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
g_return_val_if_fail (index_ < array->len, NULL);
|
||
|
||
if (array->clear_func != NULL)
|
||
array->clear_func (g_array_elt_pos (array, index_));
|
||
|
||
if (index_ != array->len - 1)
|
||
memcpy (g_array_elt_pos (array, index_),
|
||
g_array_elt_pos (array, array->len - 1),
|
||
g_array_elt_len (array, 1));
|
||
|
||
array->len -= 1;
|
||
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
g_array_elt_zero (array, array->len, 1);
|
||
else
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_remove_range:
|
||
* @array: a @GArray
|
||
* @index_: the index of the first element to remove
|
||
* @length: the number of elements to remove
|
||
*
|
||
* Removes the given number of elements starting at the given index
|
||
* from a #GArray. The following elements are moved to close the gap.
|
||
*
|
||
* Returns: the #GArray
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
GArray*
|
||
g_array_remove_range (GArray *farray,
|
||
guint index_,
|
||
guint length)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
g_return_val_if_fail (index_ <= array->len, NULL);
|
||
g_return_val_if_fail (index_ <= G_MAXUINT - length, NULL);
|
||
g_return_val_if_fail (index_ + length <= array->len, NULL);
|
||
|
||
if (array->clear_func != NULL)
|
||
{
|
||
guint i;
|
||
|
||
for (i = 0; i < length; i++)
|
||
array->clear_func (g_array_elt_pos (array, index_ + i));
|
||
}
|
||
|
||
if (index_ + length != array->len)
|
||
memmove (g_array_elt_pos (array, index_),
|
||
g_array_elt_pos (array, index_ + length),
|
||
(array->len - (index_ + length)) * array->elt_size);
|
||
|
||
array->len -= length;
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
g_array_elt_zero (array, array->len, length);
|
||
else
|
||
g_array_zero_terminate (array);
|
||
|
||
return farray;
|
||
}
|
||
|
||
/**
|
||
* g_array_sort:
|
||
* @array: a #GArray
|
||
* @compare_func: comparison function
|
||
*
|
||
* Sorts a #GArray using @compare_func which should be a qsort()-style
|
||
* comparison function (returns less than zero for first arg is less
|
||
* than second arg, zero for equal, greater zero if first arg is
|
||
* greater than second arg).
|
||
*
|
||
* This is guaranteed to be a stable sort since version 2.32.
|
||
*/
|
||
void
|
||
g_array_sort (GArray *farray,
|
||
GCompareFunc compare_func)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_if_fail (array != NULL);
|
||
|
||
/* Don't use qsort as we want a guaranteed stable sort */
|
||
if (array->len > 0)
|
||
g_qsort_with_data (array->data,
|
||
array->len,
|
||
array->elt_size,
|
||
(GCompareDataFunc)compare_func,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* g_array_sort_with_data:
|
||
* @array: a #GArray
|
||
* @compare_func: comparison function
|
||
* @user_data: data to pass to @compare_func
|
||
*
|
||
* Like g_array_sort(), but the comparison function receives an extra
|
||
* user data argument.
|
||
*
|
||
* This is guaranteed to be a stable sort since version 2.32.
|
||
*
|
||
* There used to be a comment here about making the sort stable by
|
||
* using the addresses of the elements in the comparison function.
|
||
* This did not actually work, so any such code should be removed.
|
||
*/
|
||
void
|
||
g_array_sort_with_data (GArray *farray,
|
||
GCompareDataFunc compare_func,
|
||
gpointer user_data)
|
||
{
|
||
GRealArray *array = (GRealArray*) farray;
|
||
|
||
g_return_if_fail (array != NULL);
|
||
|
||
if (array->len > 0)
|
||
g_qsort_with_data (array->data,
|
||
array->len,
|
||
array->elt_size,
|
||
compare_func,
|
||
user_data);
|
||
}
|
||
|
||
/**
|
||
* g_array_binary_search:
|
||
* @array: a #GArray.
|
||
* @target: a pointer to the item to look up.
|
||
* @compare_func: A #GCompareFunc used to locate @target.
|
||
* @out_match_index: (optional) (out): return location
|
||
* for the index of the element, if found.
|
||
*
|
||
* Checks whether @target exists in @array by performing a binary
|
||
* search based on the given comparison function @compare_func which
|
||
* get pointers to items as arguments. If the element is found, %TRUE
|
||
* is returned and the element’s index is returned in @out_match_index
|
||
* (if non-%NULL). Otherwise, %FALSE is returned and @out_match_index
|
||
* is undefined. If @target exists multiple times in @array, the index
|
||
* of the first instance is returned. This search is using a binary
|
||
* search, so the @array must absolutely be sorted to return a correct
|
||
* result (if not, the function may produce false-negative).
|
||
*
|
||
* This example defines a comparison function and search an element in a #GArray:
|
||
* |[<!-- language="C" -->
|
||
* static gint
|
||
* cmpint (gconstpointer a, gconstpointer b)
|
||
* {
|
||
* const gint *_a = a;
|
||
* const gint *_b = b;
|
||
*
|
||
* return *_a - *_b;
|
||
* }
|
||
* ...
|
||
* gint i = 424242;
|
||
* guint matched_index;
|
||
* gboolean result = g_array_binary_search (garray, &i, cmpint, &matched_index);
|
||
* ...
|
||
* ]|
|
||
*
|
||
* Returns: %TRUE if @target is one of the elements of @array, %FALSE otherwise.
|
||
*
|
||
* Since: 2.62
|
||
*/
|
||
gboolean
|
||
g_array_binary_search (GArray *array,
|
||
gconstpointer target,
|
||
GCompareFunc compare_func,
|
||
guint *out_match_index)
|
||
{
|
||
gboolean result = FALSE;
|
||
GRealArray *_array = (GRealArray *) array;
|
||
guint left, middle = 0, right;
|
||
gint val;
|
||
|
||
g_return_val_if_fail (_array != NULL, FALSE);
|
||
g_return_val_if_fail (compare_func != NULL, FALSE);
|
||
|
||
if (G_LIKELY(_array->len))
|
||
{
|
||
left = 0;
|
||
right = _array->len - 1;
|
||
|
||
while (left <= right)
|
||
{
|
||
middle = left + (right - left) / 2;
|
||
|
||
val = compare_func (_array->data + (_array->elt_size * middle), target);
|
||
if (val == 0)
|
||
{
|
||
result = TRUE;
|
||
break;
|
||
}
|
||
else if (val < 0)
|
||
left = middle + 1;
|
||
else if (/* val > 0 && */ middle > 0)
|
||
right = middle - 1;
|
||
else
|
||
break; /* element not found */
|
||
}
|
||
}
|
||
|
||
if (result && out_match_index != NULL)
|
||
*out_match_index = middle;
|
||
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
g_array_maybe_expand (GRealArray *array,
|
||
guint len)
|
||
{
|
||
guint max_len, want_len;
|
||
|
||
/* The maximum array length is derived from following constraints:
|
||
* - The number of bytes must fit into a gsize / 2.
|
||
* - The number of elements must fit into guint.
|
||
* - zero terminated arrays must leave space for the terminating element
|
||
*/
|
||
max_len = MIN (G_MAXSIZE / 2 / array->elt_size, G_MAXUINT) - array->zero_terminated;
|
||
|
||
/* Detect potential overflow */
|
||
if G_UNLIKELY ((max_len - array->len) < len)
|
||
g_error ("adding %u to array would overflow", len);
|
||
|
||
want_len = array->len + len + array->zero_terminated;
|
||
if (want_len > array->elt_capacity)
|
||
{
|
||
gsize want_alloc = g_nearest_pow (g_array_elt_len (array, want_len));
|
||
want_alloc = MAX (want_alloc, MIN_ARRAY_SIZE);
|
||
|
||
array->data = g_realloc (array->data, want_alloc);
|
||
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
memset (g_array_elt_pos (array, array->elt_capacity), 0,
|
||
g_array_elt_len (array, want_len - array->elt_capacity));
|
||
|
||
array->elt_capacity = MIN (want_alloc / array->elt_size, G_MAXUINT);
|
||
}
|
||
}
|
||
|
||
typedef struct _GRealPtrArray GRealPtrArray;
|
||
|
||
/**
|
||
* GPtrArray:
|
||
* @pdata: points to the array of pointers, which may be moved when the
|
||
* array grows
|
||
* @len: number of pointers in the array
|
||
*
|
||
* Contains the public fields of a pointer array.
|
||
*/
|
||
struct _GRealPtrArray
|
||
{
|
||
gpointer *pdata;
|
||
guint len;
|
||
guint alloc;
|
||
gatomicrefcount ref_count;
|
||
guint8 null_terminated : 1; /* always either 0 or 1, so it can be added to array lengths */
|
||
GDestroyNotify element_free_func;
|
||
};
|
||
|
||
/**
|
||
* g_ptr_array_index:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index of the pointer to return
|
||
*
|
||
* Returns the pointer at the given index of the pointer array.
|
||
*
|
||
* This does not perform bounds checking on the given @index_,
|
||
* so you are responsible for checking it against the array length.
|
||
*
|
||
* Returns: the pointer at the given index
|
||
*/
|
||
|
||
static void g_ptr_array_maybe_expand (GRealPtrArray *array,
|
||
guint len);
|
||
|
||
static void
|
||
ptr_array_maybe_null_terminate (GRealPtrArray *rarray)
|
||
{
|
||
if (G_UNLIKELY (rarray->null_terminated))
|
||
rarray->pdata[rarray->len] = NULL;
|
||
}
|
||
|
||
static GPtrArray *
|
||
ptr_array_new (guint reserved_size,
|
||
GDestroyNotify element_free_func,
|
||
gboolean null_terminated)
|
||
{
|
||
GRealPtrArray *array;
|
||
|
||
array = g_slice_new (GRealPtrArray);
|
||
|
||
array->pdata = NULL;
|
||
array->len = 0;
|
||
array->alloc = 0;
|
||
array->null_terminated = null_terminated ? 1 : 0;
|
||
array->element_free_func = element_free_func;
|
||
|
||
g_atomic_ref_count_init (&array->ref_count);
|
||
|
||
if (reserved_size != 0)
|
||
{
|
||
if (G_LIKELY (reserved_size < G_MAXUINT) &&
|
||
null_terminated)
|
||
reserved_size++;
|
||
|
||
g_ptr_array_maybe_expand (array, reserved_size);
|
||
g_assert (array->pdata != NULL);
|
||
|
||
if (null_terminated)
|
||
{
|
||
/* don't use ptr_array_maybe_null_terminate(). It helps the compiler
|
||
* to see when @null_terminated is false and thereby inline
|
||
* ptr_array_new() and possibly remove the code entirely. */
|
||
array->pdata[0] = NULL;
|
||
}
|
||
}
|
||
|
||
return (GPtrArray *) array;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new:
|
||
*
|
||
* Creates a new #GPtrArray with a reference count of 1.
|
||
*
|
||
* Returns: the new #GPtrArray
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_new (void)
|
||
{
|
||
return ptr_array_new (0, NULL, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_take: (skip)
|
||
* @data: (array length=len) (transfer full) (nullable): an array of pointers,
|
||
* or %NULL for an empty array
|
||
* @len: the number of pointers in @data
|
||
* @element_free_func: (nullable): A function to free elements on @array
|
||
* destruction or %NULL
|
||
*
|
||
* Creates a new #GPtrArray with @data as pointers, @len as length and a
|
||
* reference count of 1.
|
||
*
|
||
* This avoids having to copy such data manually.
|
||
* After this call, @data belongs to the #GPtrArray and may no longer be
|
||
* modified by the caller. The memory of @data has to be dynamically
|
||
* allocated and will eventually be freed with g_free().
|
||
*
|
||
* It also sets @element_free_func for freeing each element when the array is
|
||
* destroyed either via g_ptr_array_unref(), when g_ptr_array_free() is called
|
||
* with @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Do not use it if @len is greater than %G_MAXUINT. #GPtrArray
|
||
* stores the length of its data in #guint, which may be shorter than
|
||
* #gsize.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
GPtrArray *
|
||
g_ptr_array_new_take (gpointer *data,
|
||
gsize len,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
GPtrArray *array;
|
||
GRealPtrArray *rarray;
|
||
|
||
g_return_val_if_fail (data != NULL || len == 0, NULL);
|
||
g_return_val_if_fail (len <= G_MAXUINT, NULL);
|
||
|
||
array = ptr_array_new (0, element_free_func, FALSE);
|
||
rarray = (GRealPtrArray *)array;
|
||
|
||
rarray->pdata = g_steal_pointer (&data);
|
||
rarray->len = len;
|
||
rarray->alloc = len;
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_take_null_terminated: (skip)
|
||
* @data: (array zero-terminated=1) (transfer full) (nullable): an array
|
||
* of pointers, %NULL terminated, or %NULL for an empty array
|
||
* @element_free_func: (nullable): a function to free elements on @array
|
||
* destruction or %NULL
|
||
*
|
||
* Creates a new #GPtrArray with @data as pointers, computing the length of it
|
||
* and setting the reference count to 1.
|
||
*
|
||
* This avoids having to copy such data manually.
|
||
* After this call, @data belongs to the #GPtrArray and may no longer be
|
||
* modified by the caller. The memory of @data has to be dynamically
|
||
* allocated and will eventually be freed with g_free().
|
||
*
|
||
* The length is calculated by iterating through @data until the first %NULL
|
||
* element is found.
|
||
*
|
||
* It also sets @element_free_func for freeing each element when the array is
|
||
* destroyed either via g_ptr_array_unref(), when g_ptr_array_free() is called
|
||
* with @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Do not use it if the @data length is greater than %G_MAXUINT. #GPtrArray
|
||
* stores the length of its data in #guint, which may be shorter than
|
||
* #gsize.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
GPtrArray *
|
||
g_ptr_array_new_take_null_terminated (gpointer *data,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
GPtrArray *array;
|
||
gsize len = 0;
|
||
|
||
if (data != NULL)
|
||
{
|
||
for (gsize i = 0; data[i] != NULL; ++i)
|
||
len += 1;
|
||
}
|
||
|
||
g_return_val_if_fail (len <= G_MAXUINT, NULL);
|
||
|
||
array = g_ptr_array_new_take (g_steal_pointer (&data), len, element_free_func);
|
||
((GRealPtrArray *)array)->null_terminated = TRUE;
|
||
|
||
return array;
|
||
}
|
||
|
||
static GPtrArray *
|
||
ptr_array_new_from_array (gpointer *data,
|
||
gsize len,
|
||
GCopyFunc copy_func,
|
||
gpointer copy_func_user_data,
|
||
GDestroyNotify element_free_func,
|
||
gboolean null_terminated)
|
||
{
|
||
GPtrArray *array;
|
||
GRealPtrArray *rarray;
|
||
|
||
g_assert (data != NULL || len == 0);
|
||
g_assert (len <= G_MAXUINT);
|
||
|
||
array = ptr_array_new (len, element_free_func, null_terminated);
|
||
rarray = (GRealPtrArray *)array;
|
||
|
||
if (copy_func != NULL)
|
||
{
|
||
for (gsize i = 0; i < len; i++)
|
||
rarray->pdata[i] = copy_func (data[i], copy_func_user_data);
|
||
}
|
||
else if (len != 0)
|
||
{
|
||
memcpy (rarray->pdata, data, len * sizeof (gpointer));
|
||
}
|
||
|
||
if (null_terminated && rarray->pdata != NULL)
|
||
rarray->pdata[len] = NULL;
|
||
|
||
rarray->len = len;
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_from_array: (skip)
|
||
* @data: (array length=len) (transfer none) (nullable): an array of pointers,
|
||
* or %NULL for an empty array
|
||
* @len: the number of pointers in @data
|
||
* @copy_func: (nullable): a copy function used to copy every element in the
|
||
* array or %NULL.
|
||
* @copy_func_user_data: user data passed to @copy_func, or %NULL
|
||
* @element_free_func: (nullable): a function to free elements on @array
|
||
* destruction or %NULL
|
||
*
|
||
* Creates a new #GPtrArray, copying @len pointers from @data, and setting
|
||
* the array’s reference count to 1.
|
||
*
|
||
* This avoids having to manually add each element one by one.
|
||
*
|
||
* If @copy_func is provided, then it is used to copy each element before
|
||
* adding them to the new array. If it is %NULL then the pointers are copied
|
||
* directly.
|
||
*
|
||
* It also sets @element_free_func for freeing each element when the array is
|
||
* destroyed either via g_ptr_array_unref(), when g_ptr_array_free() is called
|
||
* with @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Do not use it if @len is greater than %G_MAXUINT. #GPtrArray
|
||
* stores the length of its data in #guint, which may be shorter than
|
||
* #gsize.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
GPtrArray *
|
||
g_ptr_array_new_from_array (gpointer *data,
|
||
gsize len,
|
||
GCopyFunc copy_func,
|
||
gpointer copy_func_user_data,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
g_return_val_if_fail (data != NULL || len == 0, NULL);
|
||
g_return_val_if_fail (len <= G_MAXUINT, NULL);
|
||
|
||
return ptr_array_new_from_array (
|
||
data, len, copy_func, copy_func_user_data, element_free_func, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_from_null_terminated_array: (skip)
|
||
* @data: (array zero-terminated=1) (transfer none) (nullable): an array of
|
||
* pointers, %NULL terminated; or %NULL for an empty array
|
||
* @copy_func: (nullable): a copy function used to copy every element in the
|
||
* array or %NULL.
|
||
* @copy_func_user_data: user data passed to @copy_func, or %NULL
|
||
* @element_free_func: (nullable): a function to free elements on @array
|
||
* destruction or %NULL
|
||
*
|
||
* Creates a new #GPtrArray copying the pointers from @data after having
|
||
* computed the length of it and with a reference count of 1.
|
||
* This avoids having to manually add each element one by one.
|
||
* If @copy_func is provided, then it is used to copy the data in the new
|
||
* array.
|
||
* It also set @element_free_func for freeing each element when the array is
|
||
* destroyed either via g_ptr_array_unref(), when g_ptr_array_free() is called
|
||
* with @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Do not use it if the @data has more than %G_MAXUINT elements. #GPtrArray
|
||
* stores the length of its data in #guint, which may be shorter than
|
||
* #gsize.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
GPtrArray *
|
||
g_ptr_array_new_from_null_terminated_array (gpointer *data,
|
||
GCopyFunc copy_func,
|
||
gpointer copy_func_user_data,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
gsize len = 0;
|
||
|
||
if (data != NULL)
|
||
{
|
||
for (gsize i = 0; data[i] != NULL; ++i)
|
||
len += 1;
|
||
}
|
||
|
||
g_assert (data != NULL || len == 0);
|
||
g_return_val_if_fail (len <= G_MAXUINT, NULL);
|
||
|
||
return ptr_array_new_from_array (
|
||
data, len, copy_func, copy_func_user_data, element_free_func, TRUE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_steal:
|
||
* @array: a #GPtrArray.
|
||
* @len: (optional) (out): pointer to retrieve the number of
|
||
* elements of the original array
|
||
*
|
||
* Frees the data in the array and resets the size to zero, while
|
||
* the underlying array is preserved for use elsewhere and returned
|
||
* to the caller.
|
||
*
|
||
* Note that if the array is %NULL terminated this may still return
|
||
* %NULL if the length of the array was zero and pdata was not yet
|
||
* allocated.
|
||
*
|
||
* Even if set, the #GDestroyNotify function will never be called
|
||
* on the current contents of the array and the caller is
|
||
* responsible for freeing the array elements.
|
||
*
|
||
* An example of use:
|
||
* |[<!-- language="C" -->
|
||
* g_autoptr(GPtrArray) chunk_buffer = g_ptr_array_new_with_free_func (g_bytes_unref);
|
||
*
|
||
* // Some part of your application appends a number of chunks to the pointer array.
|
||
* g_ptr_array_add (chunk_buffer, g_bytes_new_static ("hello", 5));
|
||
* g_ptr_array_add (chunk_buffer, g_bytes_new_static ("world", 5));
|
||
*
|
||
* …
|
||
*
|
||
* // Periodically, the chunks need to be sent as an array-and-length to some
|
||
* // other part of the program.
|
||
* GBytes **chunks;
|
||
* gsize n_chunks;
|
||
*
|
||
* chunks = g_ptr_array_steal (chunk_buffer, &n_chunks);
|
||
* for (gsize i = 0; i < n_chunks; i++)
|
||
* {
|
||
* // Do something with each chunk here, and then free them, since
|
||
* // g_ptr_array_steal() transfers ownership of all the elements and the
|
||
* // array to the caller.
|
||
* …
|
||
*
|
||
* g_bytes_unref (chunks[i]);
|
||
* }
|
||
*
|
||
* g_free (chunks);
|
||
*
|
||
* // After calling g_ptr_array_steal(), the pointer array can be reused for the
|
||
* // next set of chunks.
|
||
* g_assert (chunk_buffer->len == 0);
|
||
* ]|
|
||
*
|
||
* Returns: (transfer full) (nullable): the element data, which should be
|
||
* freed using g_free(). This may be %NULL if the array doesn’t have any
|
||
* elements (i.e. if `*len` is zero).
|
||
*
|
||
* Since: 2.64
|
||
*/
|
||
gpointer *
|
||
g_ptr_array_steal (GPtrArray *array,
|
||
gsize *len)
|
||
{
|
||
GRealPtrArray *rarray;
|
||
gpointer *segment;
|
||
|
||
g_return_val_if_fail (array != NULL, NULL);
|
||
|
||
rarray = (GRealPtrArray *) array;
|
||
segment = (gpointer *) rarray->pdata;
|
||
|
||
if (len != NULL)
|
||
*len = rarray->len;
|
||
|
||
rarray->pdata = NULL;
|
||
rarray->len = 0;
|
||
rarray->alloc = 0;
|
||
return segment;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_copy:
|
||
* @array: #GPtrArray to duplicate
|
||
* @func: (nullable): a copy function used to copy every element in the array
|
||
* @user_data: user data passed to the copy function @func, or %NULL
|
||
*
|
||
* Makes a full (deep) copy of a #GPtrArray.
|
||
*
|
||
* @func, as a #GCopyFunc, takes two arguments, the data to be copied
|
||
* and a @user_data pointer. On common processor architectures, it's safe to
|
||
* pass %NULL as @user_data if the copy function takes only one argument. You
|
||
* may get compiler warnings from this though if compiling with GCC’s
|
||
* `-Wcast-function-type` warning.
|
||
*
|
||
* If @func is %NULL, then only the pointers (and not what they are
|
||
* pointing to) are copied to the new #GPtrArray.
|
||
*
|
||
* The copy of @array will have the same #GDestroyNotify for its elements as
|
||
* @array. The copy will also be %NULL terminated if (and only if) the source
|
||
* array is.
|
||
*
|
||
* Returns: (transfer full): a deep copy of the initial #GPtrArray.
|
||
*
|
||
* Since: 2.62
|
||
**/
|
||
GPtrArray *
|
||
g_ptr_array_copy (GPtrArray *array,
|
||
GCopyFunc func,
|
||
gpointer user_data)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *) array;
|
||
GPtrArray *new_array;
|
||
|
||
g_return_val_if_fail (array != NULL, NULL);
|
||
|
||
new_array = ptr_array_new (0,
|
||
rarray->element_free_func,
|
||
rarray->null_terminated);
|
||
|
||
if (rarray->alloc > 0)
|
||
{
|
||
g_ptr_array_maybe_expand ((GRealPtrArray *) new_array, array->len + rarray->null_terminated);
|
||
|
||
if (array->len > 0)
|
||
{
|
||
if (func != NULL)
|
||
{
|
||
guint i;
|
||
|
||
for (i = 0; i < array->len; i++)
|
||
new_array->pdata[i] = func (array->pdata[i], user_data);
|
||
}
|
||
else
|
||
{
|
||
memcpy (new_array->pdata, array->pdata,
|
||
array->len * sizeof (*array->pdata));
|
||
}
|
||
|
||
new_array->len = array->len;
|
||
}
|
||
|
||
ptr_array_maybe_null_terminate ((GRealPtrArray *) new_array);
|
||
}
|
||
|
||
return new_array;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_sized_new:
|
||
* @reserved_size: number of pointers preallocated
|
||
*
|
||
* Creates a new #GPtrArray with @reserved_size pointers preallocated
|
||
* and a reference count of 1. This avoids frequent reallocation, if
|
||
* you are going to add many pointers to the array. Note however that
|
||
* the size of the array is still 0.
|
||
*
|
||
* Returns: the new #GPtrArray
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_sized_new (guint reserved_size)
|
||
{
|
||
return ptr_array_new (reserved_size, NULL, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_array_copy:
|
||
* @array: A #GArray.
|
||
*
|
||
* Create a shallow copy of a #GArray. If the array elements consist of
|
||
* pointers to data, the pointers are copied but the actual data is not.
|
||
*
|
||
* Returns: (transfer container): A copy of @array.
|
||
*
|
||
* Since: 2.62
|
||
**/
|
||
GArray *
|
||
g_array_copy (GArray *array)
|
||
{
|
||
GRealArray *rarray = (GRealArray *) array;
|
||
GRealArray *new_rarray;
|
||
|
||
g_return_val_if_fail (rarray != NULL, NULL);
|
||
|
||
new_rarray =
|
||
(GRealArray *) g_array_sized_new (rarray->zero_terminated, rarray->clear,
|
||
rarray->elt_size, rarray->elt_capacity);
|
||
new_rarray->len = rarray->len;
|
||
if (rarray->len > 0)
|
||
memcpy (new_rarray->data, rarray->data, rarray->len * rarray->elt_size);
|
||
|
||
g_array_zero_terminate (new_rarray);
|
||
|
||
return (GArray *) new_rarray;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_with_free_func:
|
||
* @element_free_func: (nullable): A function to free elements with
|
||
* destroy @array or %NULL
|
||
*
|
||
* Creates a new #GPtrArray with a reference count of 1 and use
|
||
* @element_free_func for freeing each element when the array is destroyed
|
||
* either via g_ptr_array_unref(), when g_ptr_array_free() is called with
|
||
* @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_new_with_free_func (GDestroyNotify element_free_func)
|
||
{
|
||
return ptr_array_new (0, element_free_func, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_full:
|
||
* @reserved_size: number of pointers preallocated
|
||
* @element_free_func: (nullable): A function to free elements with
|
||
* destroy @array or %NULL
|
||
*
|
||
* Creates a new #GPtrArray with @reserved_size pointers preallocated
|
||
* and a reference count of 1. This avoids frequent reallocation, if
|
||
* you are going to add many pointers to the array. Note however that
|
||
* the size of the array is still 0. It also set @element_free_func
|
||
* for freeing each element when the array is destroyed either via
|
||
* g_ptr_array_unref(), when g_ptr_array_free() is called with
|
||
* @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.30
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_new_full (guint reserved_size,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
return ptr_array_new (reserved_size, element_free_func, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_new_null_terminated:
|
||
* @reserved_size: number of pointers preallocated.
|
||
* If @null_terminated is %TRUE, the actually allocated
|
||
* buffer size is @reserved_size plus 1, unless @reserved_size
|
||
* is zero, in which case no initial buffer gets allocated.
|
||
* @element_free_func: (nullable): A function to free elements with
|
||
* destroy @array or %NULL
|
||
* @null_terminated: whether to make the array as %NULL terminated.
|
||
*
|
||
* Like g_ptr_array_new_full() but also allows to set the array to
|
||
* be %NULL terminated. A %NULL terminated pointer array has an
|
||
* additional %NULL pointer after the last element, beyond the
|
||
* current length.
|
||
*
|
||
* #GPtrArray created by other constructors are not automatically %NULL
|
||
* terminated.
|
||
*
|
||
* Note that if the @array's length is zero and currently no
|
||
* data array is allocated, then pdata will still be %NULL.
|
||
* %GPtrArray will only %NULL terminate pdata, if an actual
|
||
* array is allocated. It does not guarantee that an array
|
||
* is always allocated. In other words, if the length is zero,
|
||
* then pdata may either point to a %NULL terminated array of length
|
||
* zero or be %NULL.
|
||
*
|
||
* Returns: (transfer full): A new #GPtrArray
|
||
*
|
||
* Since: 2.74
|
||
*/
|
||
GPtrArray *
|
||
g_ptr_array_new_null_terminated (guint reserved_size,
|
||
GDestroyNotify element_free_func,
|
||
gboolean null_terminated)
|
||
{
|
||
return ptr_array_new (reserved_size, element_free_func, null_terminated);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_set_free_func:
|
||
* @array: A #GPtrArray
|
||
* @element_free_func: (nullable): A function to free elements with
|
||
* destroy @array or %NULL
|
||
*
|
||
* Sets a function for freeing each element when @array is destroyed
|
||
* either via g_ptr_array_unref(), when g_ptr_array_free() is called
|
||
* with @free_segment set to %TRUE or when removing elements.
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
void
|
||
g_ptr_array_set_free_func (GPtrArray *array,
|
||
GDestroyNotify element_free_func)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
|
||
g_return_if_fail (array);
|
||
|
||
rarray->element_free_func = element_free_func;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_is_null_terminated:
|
||
* @array: the #GPtrArray
|
||
*
|
||
* Gets whether the @array was constructed as %NULL-terminated.
|
||
*
|
||
* This will only return %TRUE for arrays constructed by passing %TRUE to the
|
||
* `null_terminated` argument of g_ptr_array_new_null_terminated(). It will not
|
||
* return %TRUE for normal arrays which have had a %NULL element appended to
|
||
* them.
|
||
*
|
||
* Returns: %TRUE if the array is made to be %NULL terminated.
|
||
*
|
||
* Since: 2.74
|
||
*/
|
||
gboolean
|
||
g_ptr_array_is_null_terminated (GPtrArray *array)
|
||
{
|
||
g_return_val_if_fail (array, FALSE);
|
||
|
||
return ((GRealPtrArray *) array)->null_terminated;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_ref:
|
||
* @array: a #GPtrArray
|
||
*
|
||
* Atomically increments the reference count of @array by one.
|
||
* This function is thread-safe and may be called from any thread.
|
||
*
|
||
* Returns: The passed in #GPtrArray
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_ref (GPtrArray *array)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
|
||
g_return_val_if_fail (array, NULL);
|
||
|
||
g_atomic_ref_count_inc (&rarray->ref_count);
|
||
|
||
return array;
|
||
}
|
||
|
||
static gpointer *ptr_array_free (GPtrArray *, ArrayFreeFlags);
|
||
|
||
/**
|
||
* g_ptr_array_unref:
|
||
* @array: A #GPtrArray
|
||
*
|
||
* Atomically decrements the reference count of @array by one. If the
|
||
* reference count drops to 0, the effect is the same as calling
|
||
* g_ptr_array_free() with @free_segment set to %TRUE. This function
|
||
* is thread-safe and may be called from any thread.
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
void
|
||
g_ptr_array_unref (GPtrArray *array)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
|
||
g_return_if_fail (array);
|
||
|
||
if (g_atomic_ref_count_dec (&rarray->ref_count))
|
||
ptr_array_free (array, FREE_SEGMENT);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_free:
|
||
* @array: a #GPtrArray
|
||
* @free_seg: if %TRUE the actual pointer array is freed as well
|
||
*
|
||
* Frees the memory allocated for the #GPtrArray. If @free_seg is %TRUE
|
||
* it frees the memory block holding the elements as well. Pass %FALSE
|
||
* if you want to free the #GPtrArray wrapper but preserve the
|
||
* underlying array for use elsewhere. If the reference count of @array
|
||
* is greater than one, the #GPtrArray wrapper is preserved but the
|
||
* size of @array will be set to zero.
|
||
*
|
||
* If array contents point to dynamically-allocated memory, they should
|
||
* be freed separately if @free_seg is %TRUE and no #GDestroyNotify
|
||
* function has been set for @array.
|
||
*
|
||
* Note that if the array is %NULL terminated and @free_seg is %FALSE
|
||
* then this will always return an allocated %NULL terminated buffer.
|
||
* If pdata is previously %NULL, a new buffer will be allocated.
|
||
*
|
||
* This function is not thread-safe. If using a #GPtrArray from multiple
|
||
* threads, use only the atomic g_ptr_array_ref() and g_ptr_array_unref()
|
||
* functions.
|
||
*
|
||
* Returns: (transfer full) (nullable): the pointer array if @free_seg is
|
||
* %FALSE, otherwise %NULL. The pointer array should be freed using g_free().
|
||
*/
|
||
gpointer*
|
||
g_ptr_array_free (GPtrArray *array,
|
||
gboolean free_segment)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
ArrayFreeFlags flags;
|
||
|
||
g_return_val_if_fail (rarray, NULL);
|
||
|
||
flags = (free_segment ? FREE_SEGMENT : 0);
|
||
|
||
/* if others are holding a reference, preserve the wrapper but
|
||
* do free/return the data
|
||
*
|
||
* Coverity doesn’t understand this and assumes it’s a leak, so comment this
|
||
* out.
|
||
*/
|
||
#ifndef __COVERITY__
|
||
if (!g_atomic_ref_count_dec (&rarray->ref_count))
|
||
flags |= PRESERVE_WRAPPER;
|
||
#endif
|
||
|
||
return ptr_array_free (array, flags);
|
||
}
|
||
|
||
static gpointer *
|
||
ptr_array_free (GPtrArray *array,
|
||
ArrayFreeFlags flags)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
gpointer *segment;
|
||
|
||
if (flags & FREE_SEGMENT)
|
||
{
|
||
/* Data here is stolen and freed manually. It is an
|
||
* error to attempt to access the array data (including
|
||
* mutating the array bounds) during destruction).
|
||
*
|
||
* https://bugzilla.gnome.org/show_bug.cgi?id=769064
|
||
*/
|
||
gpointer *stolen_pdata = g_steal_pointer (&rarray->pdata);
|
||
if (rarray->element_free_func != NULL)
|
||
{
|
||
guint i;
|
||
|
||
for (i = 0; i < rarray->len; ++i)
|
||
rarray->element_free_func (stolen_pdata[i]);
|
||
}
|
||
|
||
g_free (stolen_pdata);
|
||
segment = NULL;
|
||
}
|
||
else
|
||
{
|
||
segment = rarray->pdata;
|
||
if (!segment && rarray->null_terminated)
|
||
segment = (gpointer *) g_new0 (char *, 1);
|
||
}
|
||
|
||
if (flags & PRESERVE_WRAPPER)
|
||
{
|
||
rarray->pdata = NULL;
|
||
rarray->len = 0;
|
||
rarray->alloc = 0;
|
||
}
|
||
else
|
||
{
|
||
g_slice_free1 (sizeof (GRealPtrArray), rarray);
|
||
}
|
||
|
||
return segment;
|
||
}
|
||
|
||
static void
|
||
g_ptr_array_maybe_expand (GRealPtrArray *array,
|
||
guint len)
|
||
{
|
||
guint max_len;
|
||
|
||
/* The maximum array length is derived from following constraints:
|
||
* - The number of bytes must fit into a gsize / 2.
|
||
* - The number of elements must fit into guint.
|
||
*/
|
||
max_len = MIN (G_MAXSIZE / 2 / sizeof (gpointer), G_MAXUINT);
|
||
|
||
/* Detect potential overflow */
|
||
if G_UNLIKELY ((max_len - array->len) < len)
|
||
g_error ("adding %u to array would overflow", len);
|
||
|
||
if ((array->len + len) > array->alloc)
|
||
{
|
||
guint old_alloc = array->alloc;
|
||
gsize want_alloc = g_nearest_pow (sizeof (gpointer) * (array->len + len));
|
||
want_alloc = MAX (want_alloc, MIN_ARRAY_SIZE);
|
||
array->alloc = MIN (want_alloc / sizeof (gpointer), G_MAXUINT);
|
||
array->pdata = g_realloc (array->pdata, want_alloc);
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
for ( ; old_alloc < array->alloc; old_alloc++)
|
||
array->pdata [old_alloc] = NULL;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_set_size:
|
||
* @array: a #GPtrArray
|
||
* @length: the new length of the pointer array
|
||
*
|
||
* Sets the size of the array. When making the array larger,
|
||
* newly-added elements will be set to %NULL. When making it smaller,
|
||
* if @array has a non-%NULL #GDestroyNotify function then it will be
|
||
* called for the removed elements.
|
||
*/
|
||
void
|
||
g_ptr_array_set_size (GPtrArray *array,
|
||
gint length)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
guint length_unsigned;
|
||
|
||
g_return_if_fail (rarray);
|
||
g_return_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL));
|
||
g_return_if_fail (length >= 0);
|
||
|
||
length_unsigned = (guint) length;
|
||
|
||
if (length_unsigned > rarray->len)
|
||
{
|
||
guint i;
|
||
|
||
if (G_UNLIKELY (rarray->null_terminated) &&
|
||
length_unsigned - rarray->len > G_MAXUINT - 1)
|
||
g_error ("array would overflow");
|
||
|
||
g_ptr_array_maybe_expand (rarray, (length_unsigned - rarray->len) + rarray->null_terminated);
|
||
|
||
/* This is not
|
||
* memset (array->pdata + array->len, 0,
|
||
* sizeof (gpointer) * (length_unsigned - array->len));
|
||
* to make it really portable. Remember (void*)NULL needn't be
|
||
* bitwise zero. It of course is silly not to use memset (..,0,..).
|
||
*/
|
||
for (i = rarray->len; i < length_unsigned; i++)
|
||
rarray->pdata[i] = NULL;
|
||
|
||
rarray->len = length_unsigned;
|
||
|
||
ptr_array_maybe_null_terminate (rarray);
|
||
}
|
||
else if (length_unsigned < rarray->len)
|
||
g_ptr_array_remove_range (array, length_unsigned, rarray->len - length_unsigned);
|
||
}
|
||
|
||
static gpointer
|
||
ptr_array_remove_index (GPtrArray *array,
|
||
guint index_,
|
||
gboolean fast,
|
||
gboolean free_element)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *) array;
|
||
gpointer result;
|
||
|
||
g_return_val_if_fail (rarray, NULL);
|
||
g_return_val_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL), NULL);
|
||
|
||
g_return_val_if_fail (index_ < rarray->len, NULL);
|
||
|
||
result = rarray->pdata[index_];
|
||
|
||
if (rarray->element_free_func != NULL && free_element)
|
||
rarray->element_free_func (rarray->pdata[index_]);
|
||
|
||
if (index_ != rarray->len - 1 && !fast)
|
||
memmove (rarray->pdata + index_, rarray->pdata + index_ + 1,
|
||
sizeof (gpointer) * (rarray->len - index_ - 1));
|
||
else if (index_ != rarray->len - 1)
|
||
rarray->pdata[index_] = rarray->pdata[rarray->len - 1];
|
||
|
||
rarray->len -= 1;
|
||
|
||
if (rarray->null_terminated || G_UNLIKELY (g_mem_gc_friendly))
|
||
rarray->pdata[rarray->len] = NULL;
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_remove_index:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index of the pointer to remove
|
||
*
|
||
* Removes the pointer at the given index from the pointer array.
|
||
* The following elements are moved down one place. If @array has
|
||
* a non-%NULL #GDestroyNotify function it is called for the removed
|
||
* element. If so, the return value from this function will potentially point
|
||
* to freed memory (depending on the #GDestroyNotify implementation).
|
||
*
|
||
* Returns: (nullable): the pointer which was removed
|
||
*/
|
||
gpointer
|
||
g_ptr_array_remove_index (GPtrArray *array,
|
||
guint index_)
|
||
{
|
||
return ptr_array_remove_index (array, index_, FALSE, TRUE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_remove_index_fast:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index of the pointer to remove
|
||
*
|
||
* Removes the pointer at the given index from the pointer array.
|
||
* The last element in the array is used to fill in the space, so
|
||
* this function does not preserve the order of the array. But it
|
||
* is faster than g_ptr_array_remove_index(). If @array has a non-%NULL
|
||
* #GDestroyNotify function it is called for the removed element. If so, the
|
||
* return value from this function will potentially point to freed memory
|
||
* (depending on the #GDestroyNotify implementation).
|
||
*
|
||
* Returns: (nullable): the pointer which was removed
|
||
*/
|
||
gpointer
|
||
g_ptr_array_remove_index_fast (GPtrArray *array,
|
||
guint index_)
|
||
{
|
||
return ptr_array_remove_index (array, index_, TRUE, TRUE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_steal_index:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index of the pointer to steal
|
||
*
|
||
* Removes the pointer at the given index from the pointer array.
|
||
* The following elements are moved down one place. The #GDestroyNotify for
|
||
* @array is *not* called on the removed element; ownership is transferred to
|
||
* the caller of this function.
|
||
*
|
||
* Returns: (transfer full) (nullable): the pointer which was removed
|
||
* Since: 2.58
|
||
*/
|
||
gpointer
|
||
g_ptr_array_steal_index (GPtrArray *array,
|
||
guint index_)
|
||
{
|
||
return ptr_array_remove_index (array, index_, FALSE, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_steal_index_fast:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index of the pointer to steal
|
||
*
|
||
* Removes the pointer at the given index from the pointer array.
|
||
* The last element in the array is used to fill in the space, so
|
||
* this function does not preserve the order of the array. But it
|
||
* is faster than g_ptr_array_steal_index(). The #GDestroyNotify for @array is
|
||
* *not* called on the removed element; ownership is transferred to the caller
|
||
* of this function.
|
||
*
|
||
* Returns: (transfer full) (nullable): the pointer which was removed
|
||
* Since: 2.58
|
||
*/
|
||
gpointer
|
||
g_ptr_array_steal_index_fast (GPtrArray *array,
|
||
guint index_)
|
||
{
|
||
return ptr_array_remove_index (array, index_, TRUE, FALSE);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_remove_range:
|
||
* @array: a @GPtrArray
|
||
* @index_: the index of the first pointer to remove
|
||
* @length: the number of pointers to remove
|
||
*
|
||
* Removes the given number of pointers starting at the given index
|
||
* from a #GPtrArray. The following elements are moved to close the
|
||
* gap. If @array has a non-%NULL #GDestroyNotify function it is
|
||
* called for the removed elements.
|
||
*
|
||
* Returns: the @array
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
GPtrArray*
|
||
g_ptr_array_remove_range (GPtrArray *array,
|
||
guint index_,
|
||
guint length)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
guint i;
|
||
|
||
g_return_val_if_fail (rarray != NULL, NULL);
|
||
g_return_val_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL), NULL);
|
||
g_return_val_if_fail (index_ <= rarray->len, NULL);
|
||
g_return_val_if_fail (index_ <= G_MAXUINT - length, NULL);
|
||
g_return_val_if_fail (length == 0 || index_ + length <= rarray->len, NULL);
|
||
|
||
if (length == 0)
|
||
return array;
|
||
|
||
if (rarray->element_free_func != NULL)
|
||
{
|
||
for (i = index_; i < index_ + length; i++)
|
||
rarray->element_free_func (rarray->pdata[i]);
|
||
}
|
||
|
||
if (index_ + length != rarray->len)
|
||
{
|
||
memmove (&rarray->pdata[index_],
|
||
&rarray->pdata[index_ + length],
|
||
(rarray->len - (index_ + length)) * sizeof (gpointer));
|
||
}
|
||
|
||
rarray->len -= length;
|
||
if (G_UNLIKELY (g_mem_gc_friendly))
|
||
{
|
||
for (i = 0; i < length; i++)
|
||
rarray->pdata[rarray->len + i] = NULL;
|
||
}
|
||
else
|
||
ptr_array_maybe_null_terminate (rarray);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_remove:
|
||
* @array: a #GPtrArray
|
||
* @data: the pointer to remove
|
||
*
|
||
* Removes the first occurrence of the given pointer from the pointer
|
||
* array. The following elements are moved down one place. If @array
|
||
* has a non-%NULL #GDestroyNotify function it is called for the
|
||
* removed element.
|
||
*
|
||
* It returns %TRUE if the pointer was removed, or %FALSE if the
|
||
* pointer was not found.
|
||
*
|
||
* Returns: %TRUE if the pointer is removed, %FALSE if the pointer
|
||
* is not found in the array
|
||
*/
|
||
gboolean
|
||
g_ptr_array_remove (GPtrArray *array,
|
||
gpointer data)
|
||
{
|
||
guint i;
|
||
|
||
g_return_val_if_fail (array, FALSE);
|
||
g_return_val_if_fail (array->len == 0 || (array->len != 0 && array->pdata != NULL), FALSE);
|
||
|
||
for (i = 0; i < array->len; i += 1)
|
||
{
|
||
if (array->pdata[i] == data)
|
||
{
|
||
g_ptr_array_remove_index (array, i);
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_remove_fast:
|
||
* @array: a #GPtrArray
|
||
* @data: the pointer to remove
|
||
*
|
||
* Removes the first occurrence of the given pointer from the pointer
|
||
* array. The last element in the array is used to fill in the space,
|
||
* so this function does not preserve the order of the array. But it
|
||
* is faster than g_ptr_array_remove(). If @array has a non-%NULL
|
||
* #GDestroyNotify function it is called for the removed element.
|
||
*
|
||
* It returns %TRUE if the pointer was removed, or %FALSE if the
|
||
* pointer was not found.
|
||
*
|
||
* Returns: %TRUE if the pointer was found in the array
|
||
*/
|
||
gboolean
|
||
g_ptr_array_remove_fast (GPtrArray *array,
|
||
gpointer data)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
guint i;
|
||
|
||
g_return_val_if_fail (rarray, FALSE);
|
||
g_return_val_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL), FALSE);
|
||
|
||
for (i = 0; i < rarray->len; i += 1)
|
||
{
|
||
if (rarray->pdata[i] == data)
|
||
{
|
||
g_ptr_array_remove_index_fast (array, i);
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_add:
|
||
* @array: a #GPtrArray
|
||
* @data: the pointer to add
|
||
*
|
||
* Adds a pointer to the end of the pointer array. The array will grow
|
||
* in size automatically if necessary.
|
||
*/
|
||
void
|
||
g_ptr_array_add (GPtrArray *array,
|
||
gpointer data)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
|
||
g_return_if_fail (rarray);
|
||
g_return_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL));
|
||
|
||
g_ptr_array_maybe_expand (rarray, 1u + rarray->null_terminated);
|
||
|
||
rarray->pdata[rarray->len++] = data;
|
||
|
||
ptr_array_maybe_null_terminate (rarray);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_extend:
|
||
* @array_to_extend: a #GPtrArray.
|
||
* @array: (transfer none): a #GPtrArray to add to the end of @array_to_extend.
|
||
* @func: (nullable): a copy function used to copy every element in the array
|
||
* @user_data: user data passed to the copy function @func, or %NULL
|
||
*
|
||
* Adds all pointers of @array to the end of the array @array_to_extend.
|
||
* The array will grow in size automatically if needed. @array_to_extend is
|
||
* modified in-place.
|
||
*
|
||
* @func, as a #GCopyFunc, takes two arguments, the data to be copied
|
||
* and a @user_data pointer. On common processor architectures, it's safe to
|
||
* pass %NULL as @user_data if the copy function takes only one argument. You
|
||
* may get compiler warnings from this though if compiling with GCC’s
|
||
* `-Wcast-function-type` warning.
|
||
*
|
||
* If @func is %NULL, then only the pointers (and not what they are
|
||
* pointing to) are copied to the new #GPtrArray.
|
||
*
|
||
* Whether @array_to_extend is %NULL terminated stays unchanged by this function.
|
||
*
|
||
* Since: 2.62
|
||
**/
|
||
void
|
||
g_ptr_array_extend (GPtrArray *array_to_extend,
|
||
GPtrArray *array,
|
||
GCopyFunc func,
|
||
gpointer user_data)
|
||
{
|
||
GRealPtrArray *rarray_to_extend = (GRealPtrArray *) array_to_extend;
|
||
|
||
g_return_if_fail (array_to_extend != NULL);
|
||
g_return_if_fail (array != NULL);
|
||
|
||
if (array->len == 0u)
|
||
return;
|
||
|
||
if (G_UNLIKELY (array->len == G_MAXUINT) &&
|
||
rarray_to_extend->null_terminated)
|
||
g_error ("adding %u to array would overflow", array->len);
|
||
|
||
g_ptr_array_maybe_expand (rarray_to_extend, array->len + rarray_to_extend->null_terminated);
|
||
|
||
if (func != NULL)
|
||
{
|
||
guint i;
|
||
|
||
for (i = 0; i < array->len; i++)
|
||
rarray_to_extend->pdata[i + rarray_to_extend->len] =
|
||
func (array->pdata[i], user_data);
|
||
}
|
||
else if (array->len > 0)
|
||
{
|
||
memcpy (rarray_to_extend->pdata + rarray_to_extend->len, array->pdata,
|
||
array->len * sizeof (*array->pdata));
|
||
}
|
||
|
||
rarray_to_extend->len += array->len;
|
||
|
||
ptr_array_maybe_null_terminate (rarray_to_extend);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_extend_and_steal:
|
||
* @array_to_extend: (transfer none): a #GPtrArray.
|
||
* @array: (transfer container): a #GPtrArray to add to the end of
|
||
* @array_to_extend.
|
||
*
|
||
* Adds all the pointers in @array to the end of @array_to_extend, transferring
|
||
* ownership of each element from @array to @array_to_extend and modifying
|
||
* @array_to_extend in-place. @array is then freed.
|
||
*
|
||
* As with g_ptr_array_free(), @array will be destroyed if its reference count
|
||
* is 1. If its reference count is higher, it will be decremented and the
|
||
* length of @array set to zero.
|
||
*
|
||
* Since: 2.62
|
||
**/
|
||
void
|
||
g_ptr_array_extend_and_steal (GPtrArray *array_to_extend,
|
||
GPtrArray *array)
|
||
{
|
||
gpointer *pdata;
|
||
|
||
g_ptr_array_extend (array_to_extend, array, NULL, NULL);
|
||
|
||
/* Get rid of @array without triggering the GDestroyNotify attached
|
||
* to the elements moved from @array to @array_to_extend. */
|
||
pdata = g_steal_pointer (&array->pdata);
|
||
array->len = 0;
|
||
((GRealPtrArray *) array)->alloc = 0;
|
||
g_ptr_array_unref (array);
|
||
g_free (pdata);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_insert:
|
||
* @array: a #GPtrArray
|
||
* @index_: the index to place the new element at, or -1 to append
|
||
* @data: the pointer to add.
|
||
*
|
||
* Inserts an element into the pointer array at the given index. The
|
||
* array will grow in size automatically if necessary.
|
||
*
|
||
* Since: 2.40
|
||
*/
|
||
void
|
||
g_ptr_array_insert (GPtrArray *array,
|
||
gint index_,
|
||
gpointer data)
|
||
{
|
||
GRealPtrArray *rarray = (GRealPtrArray *)array;
|
||
|
||
g_return_if_fail (rarray);
|
||
g_return_if_fail (index_ >= -1);
|
||
g_return_if_fail (index_ <= (gint)rarray->len);
|
||
|
||
g_ptr_array_maybe_expand (rarray, 1u + rarray->null_terminated);
|
||
|
||
if (index_ < 0)
|
||
index_ = rarray->len;
|
||
|
||
if ((guint) index_ < rarray->len)
|
||
memmove (&(rarray->pdata[index_ + 1]),
|
||
&(rarray->pdata[index_]),
|
||
(rarray->len - index_) * sizeof (gpointer));
|
||
|
||
rarray->len++;
|
||
rarray->pdata[index_] = data;
|
||
|
||
ptr_array_maybe_null_terminate (rarray);
|
||
}
|
||
|
||
/* Please keep this doc-comment in sync with pointer_array_sort_example()
|
||
* in glib/tests/array-test.c */
|
||
/**
|
||
* g_ptr_array_sort:
|
||
* @array: a #GPtrArray
|
||
* @compare_func: comparison function
|
||
*
|
||
* Sorts the array, using @compare_func which should be a qsort()-style
|
||
* comparison function (returns less than zero for first arg is less
|
||
* than second arg, zero for equal, greater than zero if first arg is
|
||
* greater than second arg).
|
||
*
|
||
* Note that the comparison function for g_ptr_array_sort() doesn't
|
||
* take the pointers from the array as arguments, it takes pointers to
|
||
* the pointers in the array.
|
||
*
|
||
* Use g_ptr_array_sort_values() if you want to use normal
|
||
* #GCompareFuncs, otherwise here is a full example of use:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct
|
||
* {
|
||
* gchar *name;
|
||
* gint size;
|
||
* } FileListEntry;
|
||
*
|
||
* static gint
|
||
* sort_filelist (gconstpointer a, gconstpointer b)
|
||
* {
|
||
* const FileListEntry *entry1 = *((FileListEntry **) a);
|
||
* const FileListEntry *entry2 = *((FileListEntry **) b);
|
||
*
|
||
* return g_ascii_strcasecmp (entry1->name, entry2->name);
|
||
* }
|
||
*
|
||
* …
|
||
* g_autoptr (GPtrArray) file_list = NULL;
|
||
*
|
||
* // initialize file_list array and load with many FileListEntry entries
|
||
* ...
|
||
* // now sort it with
|
||
* g_ptr_array_sort (file_list, sort_filelist);
|
||
* ]|
|
||
*
|
||
* This is guaranteed to be a stable sort since version 2.32.
|
||
*/
|
||
void
|
||
g_ptr_array_sort (GPtrArray *array,
|
||
GCompareFunc compare_func)
|
||
{
|
||
g_return_if_fail (array != NULL);
|
||
|
||
/* Don't use qsort as we want a guaranteed stable sort */
|
||
if (array->len > 0)
|
||
g_qsort_with_data (array->pdata,
|
||
array->len,
|
||
sizeof (gpointer),
|
||
(GCompareDataFunc)compare_func,
|
||
NULL);
|
||
}
|
||
|
||
/* Please keep this doc-comment in sync with
|
||
* pointer_array_sort_with_data_example() in glib/tests/array-test.c */
|
||
/**
|
||
* g_ptr_array_sort_with_data:
|
||
* @array: a #GPtrArray
|
||
* @compare_func: comparison function
|
||
* @user_data: data to pass to @compare_func
|
||
*
|
||
* Like g_ptr_array_sort(), but the comparison function has an extra
|
||
* user data argument.
|
||
*
|
||
* Note that the comparison function for g_ptr_array_sort_with_data()
|
||
* doesn't take the pointers from the array as arguments, it takes
|
||
* pointers to the pointers in the array.
|
||
*
|
||
* Use g_ptr_array_sort_values_with_data() if you want to use normal
|
||
* #GCompareDataFuncs, otherwise here is a full example of use:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef enum { SORT_NAME, SORT_SIZE } SortMode;
|
||
*
|
||
* typedef struct
|
||
* {
|
||
* gchar *name;
|
||
* gint size;
|
||
* } FileListEntry;
|
||
*
|
||
* static gint
|
||
* sort_filelist (gconstpointer a, gconstpointer b, gpointer user_data)
|
||
* {
|
||
* gint order;
|
||
* const SortMode sort_mode = GPOINTER_TO_INT (user_data);
|
||
* const FileListEntry *entry1 = *((FileListEntry **) a);
|
||
* const FileListEntry *entry2 = *((FileListEntry **) b);
|
||
*
|
||
* switch (sort_mode)
|
||
* {
|
||
* case SORT_NAME:
|
||
* order = g_ascii_strcasecmp (entry1->name, entry2->name);
|
||
* break;
|
||
* case SORT_SIZE:
|
||
* order = entry1->size - entry2->size;
|
||
* break;
|
||
* default:
|
||
* order = 0;
|
||
* break;
|
||
* }
|
||
* return order;
|
||
* }
|
||
*
|
||
* ...
|
||
* g_autoptr (GPtrArray) file_list = NULL;
|
||
* SortMode sort_mode;
|
||
*
|
||
* // initialize file_list array and load with many FileListEntry entries
|
||
* ...
|
||
* // now sort it with
|
||
* sort_mode = SORT_NAME;
|
||
* g_ptr_array_sort_with_data (file_list,
|
||
* sort_filelist,
|
||
* GINT_TO_POINTER (sort_mode));
|
||
* ]|
|
||
*
|
||
* This is guaranteed to be a stable sort since version 2.32.
|
||
*/
|
||
void
|
||
g_ptr_array_sort_with_data (GPtrArray *array,
|
||
GCompareDataFunc compare_func,
|
||
gpointer user_data)
|
||
{
|
||
g_return_if_fail (array != NULL);
|
||
|
||
if (array->len > 0)
|
||
g_qsort_with_data (array->pdata,
|
||
array->len,
|
||
sizeof (gpointer),
|
||
compare_func,
|
||
user_data);
|
||
}
|
||
|
||
static inline gint
|
||
compare_ptr_array_values (gconstpointer a, gconstpointer b, gpointer user_data)
|
||
{
|
||
gconstpointer aa = *((gconstpointer *) a);
|
||
gconstpointer bb = *((gconstpointer *) b);
|
||
GCompareFunc compare_func = user_data;
|
||
|
||
return compare_func (aa, bb);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_sort_values:
|
||
* @array: a #GPtrArray
|
||
* @compare_func: a #GCompareFunc comparison function
|
||
*
|
||
* Sorts the array, using @compare_func which should be a qsort()-style
|
||
* comparison function (returns less than zero for first arg is less
|
||
* than second arg, zero for equal, greater than zero if first arg is
|
||
* greater than second arg).
|
||
*
|
||
* This is guaranteed to be a stable sort.
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
void
|
||
g_ptr_array_sort_values (GPtrArray *array,
|
||
GCompareFunc compare_func)
|
||
{
|
||
g_ptr_array_sort_with_data (array, compare_ptr_array_values, compare_func);
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
GCompareDataFunc compare_func;
|
||
gpointer user_data;
|
||
} GPtrArraySortValuesData;
|
||
|
||
static inline gint
|
||
compare_ptr_array_values_with_data (gconstpointer a,
|
||
gconstpointer b,
|
||
gpointer user_data)
|
||
{
|
||
gconstpointer aa = *((gconstpointer *) a);
|
||
gconstpointer bb = *((gconstpointer *) b);
|
||
GPtrArraySortValuesData *data = user_data;
|
||
|
||
return data->compare_func (aa, bb, data->user_data);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_sort_values_with_data:
|
||
* @array: a #GPtrArray
|
||
* @compare_func: a #GCompareDataFunc comparison function
|
||
* @user_data: data to pass to @compare_func
|
||
*
|
||
* Like g_ptr_array_sort_values(), but the comparison function has an extra
|
||
* user data argument.
|
||
*
|
||
* This is guaranteed to be a stable sort.
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
void
|
||
g_ptr_array_sort_values_with_data (GPtrArray *array,
|
||
GCompareDataFunc compare_func,
|
||
gpointer user_data)
|
||
{
|
||
g_ptr_array_sort_with_data (array, compare_ptr_array_values_with_data,
|
||
&(GPtrArraySortValuesData){
|
||
.compare_func = compare_func,
|
||
.user_data = user_data,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_foreach:
|
||
* @array: a #GPtrArray
|
||
* @func: the function to call for each array element
|
||
* @user_data: user data to pass to the function
|
||
*
|
||
* Calls a function for each element of a #GPtrArray. @func must not
|
||
* add elements to or remove elements from the array.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
void
|
||
g_ptr_array_foreach (GPtrArray *array,
|
||
GFunc func,
|
||
gpointer user_data)
|
||
{
|
||
guint i;
|
||
|
||
g_return_if_fail (array);
|
||
|
||
for (i = 0; i < array->len; i++)
|
||
(*func) (array->pdata[i], user_data);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_find: (skip)
|
||
* @haystack: pointer array to be searched
|
||
* @needle: pointer to look for
|
||
* @index_: (optional) (out): return location for the index of
|
||
* the element, if found
|
||
*
|
||
* Checks whether @needle exists in @haystack. If the element is found, %TRUE is
|
||
* returned and the element’s index is returned in @index_ (if non-%NULL).
|
||
* Otherwise, %FALSE is returned and @index_ is undefined. If @needle exists
|
||
* multiple times in @haystack, the index of the first instance is returned.
|
||
*
|
||
* This does pointer comparisons only. If you want to use more complex equality
|
||
* checks, such as string comparisons, use g_ptr_array_find_with_equal_func().
|
||
*
|
||
* Returns: %TRUE if @needle is one of the elements of @haystack
|
||
* Since: 2.54
|
||
*/
|
||
gboolean
|
||
g_ptr_array_find (GPtrArray *haystack,
|
||
gconstpointer needle,
|
||
guint *index_)
|
||
{
|
||
return g_ptr_array_find_with_equal_func (haystack, needle, NULL, index_);
|
||
}
|
||
|
||
/**
|
||
* g_ptr_array_find_with_equal_func: (skip)
|
||
* @haystack: pointer array to be searched
|
||
* @needle: pointer to look for
|
||
* @equal_func: (nullable): the function to call for each element, which should
|
||
* return %TRUE when the desired element is found; or %NULL to use pointer
|
||
* equality
|
||
* @index_: (optional) (out): return location for the index of
|
||
* the element, if found
|
||
*
|
||
* Checks whether @needle exists in @haystack, using the given @equal_func.
|
||
* If the element is found, %TRUE is returned and the element’s index is
|
||
* returned in @index_ (if non-%NULL). Otherwise, %FALSE is returned and @index_
|
||
* is undefined. If @needle exists multiple times in @haystack, the index of
|
||
* the first instance is returned.
|
||
*
|
||
* @equal_func is called with the element from the array as its first parameter,
|
||
* and @needle as its second parameter. If @equal_func is %NULL, pointer
|
||
* equality is used.
|
||
*
|
||
* Returns: %TRUE if @needle is one of the elements of @haystack
|
||
* Since: 2.54
|
||
*/
|
||
gboolean
|
||
g_ptr_array_find_with_equal_func (GPtrArray *haystack,
|
||
gconstpointer needle,
|
||
GEqualFunc equal_func,
|
||
guint *index_)
|
||
{
|
||
guint i;
|
||
|
||
g_return_val_if_fail (haystack != NULL, FALSE);
|
||
|
||
if (equal_func == NULL)
|
||
equal_func = g_direct_equal;
|
||
|
||
for (i = 0; i < haystack->len; i++)
|
||
{
|
||
if (equal_func (g_ptr_array_index (haystack, i), needle))
|
||
{
|
||
if (index_ != NULL)
|
||
*index_ = i;
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* GByteArray:
|
||
* @data: a pointer to the element data. The data may be moved as
|
||
* elements are added to the #GByteArray
|
||
* @len: the number of elements in the #GByteArray
|
||
*
|
||
* Contains the public fields of a GByteArray.
|
||
*/
|
||
|
||
/**
|
||
* g_byte_array_new:
|
||
*
|
||
* Creates a new #GByteArray with a reference count of 1.
|
||
*
|
||
* Returns: (transfer full): the new #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_new (void)
|
||
{
|
||
return (GByteArray *)g_array_sized_new (FALSE, FALSE, 1, 0);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_steal:
|
||
* @array: a #GByteArray.
|
||
* @len: (optional) (out): pointer to retrieve the number of
|
||
* elements of the original array
|
||
*
|
||
* Frees the data in the array and resets the size to zero, while
|
||
* the underlying array is preserved for use elsewhere and returned
|
||
* to the caller.
|
||
*
|
||
* Returns: (transfer full): the element data, which should be
|
||
* freed using g_free().
|
||
*
|
||
* Since: 2.64
|
||
*/
|
||
guint8 *
|
||
g_byte_array_steal (GByteArray *array,
|
||
gsize *len)
|
||
{
|
||
return (guint8 *) g_array_steal ((GArray *) array, len);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_new_take:
|
||
* @data: (transfer full) (array length=len): byte data for the array
|
||
* @len: length of @data
|
||
*
|
||
* Creates a byte array containing the @data.
|
||
* After this call, @data belongs to the #GByteArray and may no longer be
|
||
* modified by the caller. The memory of @data has to be dynamically
|
||
* allocated and will eventually be freed with g_free().
|
||
*
|
||
* Do not use it if @len is greater than %G_MAXUINT. #GByteArray
|
||
* stores the length of its data in #guint, which may be shorter than
|
||
* #gsize.
|
||
*
|
||
* Since: 2.32
|
||
*
|
||
* Returns: (transfer full): a new #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_new_take (guint8 *data,
|
||
gsize len)
|
||
{
|
||
GByteArray *array;
|
||
GRealArray *real;
|
||
|
||
g_return_val_if_fail (len <= G_MAXUINT, NULL);
|
||
array = g_byte_array_new ();
|
||
real = (GRealArray *)array;
|
||
g_assert (real->data == NULL);
|
||
g_assert (real->len == 0);
|
||
|
||
real->data = data;
|
||
real->len = len;
|
||
real->elt_capacity = len;
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_sized_new:
|
||
* @reserved_size: number of bytes preallocated
|
||
*
|
||
* Creates a new #GByteArray with @reserved_size bytes preallocated.
|
||
* This avoids frequent reallocation, if you are going to add many
|
||
* bytes to the array. Note however that the size of the array is still
|
||
* 0.
|
||
*
|
||
* Returns: (transfer full): the new #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_sized_new (guint reserved_size)
|
||
{
|
||
return (GByteArray *)g_array_sized_new (FALSE, FALSE, 1, reserved_size);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_free:
|
||
* @array: a #GByteArray
|
||
* @free_segment: if %TRUE the actual byte data is freed as well
|
||
*
|
||
* Frees the memory allocated by the #GByteArray. If @free_segment is
|
||
* %TRUE it frees the actual byte data. If the reference count of
|
||
* @array is greater than one, the #GByteArray wrapper is preserved but
|
||
* the size of @array will be set to zero.
|
||
*
|
||
* Returns: the element data if @free_segment is %FALSE, otherwise
|
||
* %NULL. The element data should be freed using g_free().
|
||
*/
|
||
guint8*
|
||
g_byte_array_free (GByteArray *array,
|
||
gboolean free_segment)
|
||
{
|
||
return (guint8 *)g_array_free ((GArray *)array, free_segment);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_free_to_bytes:
|
||
* @array: (transfer full): a #GByteArray
|
||
*
|
||
* Transfers the data from the #GByteArray into a new immutable #GBytes.
|
||
*
|
||
* The #GByteArray is freed unless the reference count of @array is greater
|
||
* than one, the #GByteArray wrapper is preserved but the size of @array
|
||
* will be set to zero.
|
||
*
|
||
* This is identical to using g_bytes_new_take() and g_byte_array_free()
|
||
* together.
|
||
*
|
||
* Since: 2.32
|
||
*
|
||
* Returns: (transfer full): a new immutable #GBytes representing same
|
||
* byte data that was in the array
|
||
*/
|
||
GBytes*
|
||
g_byte_array_free_to_bytes (GByteArray *array)
|
||
{
|
||
gsize length;
|
||
|
||
g_return_val_if_fail (array != NULL, NULL);
|
||
|
||
length = array->len;
|
||
return g_bytes_new_take (g_byte_array_free (array, FALSE), length);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_ref:
|
||
* @array: A #GByteArray
|
||
*
|
||
* Atomically increments the reference count of @array by one.
|
||
* This function is thread-safe and may be called from any thread.
|
||
*
|
||
* Returns: (transfer full): The passed in #GByteArray
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_ref (GByteArray *array)
|
||
{
|
||
return (GByteArray *)g_array_ref ((GArray *)array);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_unref:
|
||
* @array: A #GByteArray
|
||
*
|
||
* Atomically decrements the reference count of @array by one. If the
|
||
* reference count drops to 0, all memory allocated by the array is
|
||
* released. This function is thread-safe and may be called from any
|
||
* thread.
|
||
*
|
||
* Since: 2.22
|
||
*/
|
||
void
|
||
g_byte_array_unref (GByteArray *array)
|
||
{
|
||
g_array_unref ((GArray *)array);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_append:
|
||
* @array: a #GByteArray
|
||
* @data: the byte data to be added
|
||
* @len: the number of bytes to add
|
||
*
|
||
* Adds the given bytes to the end of the #GByteArray.
|
||
* The array will grow in size automatically if necessary.
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_append (GByteArray *array,
|
||
const guint8 *data,
|
||
guint len)
|
||
{
|
||
g_array_append_vals ((GArray *)array, (guint8 *)data, len);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_prepend:
|
||
* @array: a #GByteArray
|
||
* @data: the byte data to be added
|
||
* @len: the number of bytes to add
|
||
*
|
||
* Adds the given data to the start of the #GByteArray.
|
||
* The array will grow in size automatically if necessary.
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_prepend (GByteArray *array,
|
||
const guint8 *data,
|
||
guint len)
|
||
{
|
||
g_array_prepend_vals ((GArray *)array, (guint8 *)data, len);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_set_size:
|
||
* @array: a #GByteArray
|
||
* @length: the new size of the #GByteArray
|
||
*
|
||
* Sets the size of the #GByteArray, expanding it if necessary.
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_set_size (GByteArray *array,
|
||
guint length)
|
||
{
|
||
g_array_set_size ((GArray *)array, length);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_remove_index:
|
||
* @array: a #GByteArray
|
||
* @index_: the index of the byte to remove
|
||
*
|
||
* Removes the byte at the given index from a #GByteArray.
|
||
* The following bytes are moved down one place.
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
**/
|
||
GByteArray*
|
||
g_byte_array_remove_index (GByteArray *array,
|
||
guint index_)
|
||
{
|
||
g_array_remove_index ((GArray *)array, index_);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_remove_index_fast:
|
||
* @array: a #GByteArray
|
||
* @index_: the index of the byte to remove
|
||
*
|
||
* Removes the byte at the given index from a #GByteArray. The last
|
||
* element in the array is used to fill in the space, so this function
|
||
* does not preserve the order of the #GByteArray. But it is faster
|
||
* than g_byte_array_remove_index().
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_remove_index_fast (GByteArray *array,
|
||
guint index_)
|
||
{
|
||
g_array_remove_index_fast ((GArray *)array, index_);
|
||
|
||
return array;
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_remove_range:
|
||
* @array: a @GByteArray
|
||
* @index_: the index of the first byte to remove
|
||
* @length: the number of bytes to remove
|
||
*
|
||
* Removes the given number of bytes starting at the given index from a
|
||
* #GByteArray. The following elements are moved to close the gap.
|
||
*
|
||
* Returns: (transfer none): the #GByteArray
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
GByteArray*
|
||
g_byte_array_remove_range (GByteArray *array,
|
||
guint index_,
|
||
guint length)
|
||
{
|
||
g_return_val_if_fail (array, NULL);
|
||
g_return_val_if_fail (index_ <= array->len, NULL);
|
||
g_return_val_if_fail (index_ <= G_MAXUINT - length, NULL);
|
||
g_return_val_if_fail (index_ + length <= array->len, NULL);
|
||
|
||
return (GByteArray *)g_array_remove_range ((GArray *)array, index_, length);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_sort:
|
||
* @array: a #GByteArray
|
||
* @compare_func: (scope call): comparison function
|
||
*
|
||
* Sorts a byte array, using @compare_func which should be a
|
||
* qsort()-style comparison function (returns less than zero for first
|
||
* arg is less than second arg, zero for equal, greater than zero if
|
||
* first arg is greater than second arg).
|
||
*
|
||
* If two array elements compare equal, their order in the sorted array
|
||
* is undefined. If you want equal elements to keep their order (i.e.
|
||
* you want a stable sort) you can write a comparison function that,
|
||
* if two elements would otherwise compare equal, compares them by
|
||
* their addresses.
|
||
*/
|
||
void
|
||
g_byte_array_sort (GByteArray *array,
|
||
GCompareFunc compare_func)
|
||
{
|
||
g_array_sort ((GArray *)array, compare_func);
|
||
}
|
||
|
||
/**
|
||
* g_byte_array_sort_with_data:
|
||
* @array: a #GByteArray
|
||
* @compare_func: (scope call): comparison function
|
||
* @user_data: data to pass to @compare_func
|
||
*
|
||
* Like g_byte_array_sort(), but the comparison function takes an extra
|
||
* user data argument.
|
||
*/
|
||
void
|
||
g_byte_array_sort_with_data (GByteArray *array,
|
||
GCompareDataFunc compare_func,
|
||
gpointer user_data)
|
||
{
|
||
g_array_sort_with_data ((GArray *)array, compare_func, user_data);
|
||
}
|