1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1997-1999, 2000-2001 Tim Janik and Red Hat, Inc.
3 * Copyright © 2010 Christian Persch
5 * SPDX-License-Identifier: LGPL-2.1-or-later
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
28 #include <stdlib.h> /* qsort() */
30 #include "gvaluetypes.h"
31 #include "gtype-private.h"
32 #include "gvaluecollector.h"
39 /* --- value functions --- */
41 value_init_long0 (GValue *value)
43 value->data[0].v_long = 0;
47 value_copy_long0 (const GValue *src_value,
50 dest_value->data[0].v_long = src_value->data[0].v_long;
54 value_lcopy_char (const GValue *value,
55 guint n_collect_values,
56 GTypeCValue *collect_values,
59 gint8 *int8_p = collect_values[0].v_pointer;
61 g_return_val_if_fail (int8_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
63 *int8_p = value->data[0].v_int;
69 value_lcopy_boolean (const GValue *value,
70 guint n_collect_values,
71 GTypeCValue *collect_values,
74 gboolean *bool_p = collect_values[0].v_pointer;
76 g_return_val_if_fail (bool_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
78 *bool_p = value->data[0].v_int;
84 value_collect_int (GValue *value,
85 guint n_collect_values,
86 GTypeCValue *collect_values,
89 value->data[0].v_int = collect_values[0].v_int;
95 value_lcopy_int (const GValue *value,
96 guint n_collect_values,
97 GTypeCValue *collect_values,
100 gint *int_p = collect_values[0].v_pointer;
102 g_return_val_if_fail (int_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
104 *int_p = value->data[0].v_int;
110 value_collect_long (GValue *value,
111 guint n_collect_values,
112 GTypeCValue *collect_values,
115 value->data[0].v_long = collect_values[0].v_long;
121 value_lcopy_long (const GValue *value,
122 guint n_collect_values,
123 GTypeCValue *collect_values,
126 glong *long_p = collect_values[0].v_pointer;
128 g_return_val_if_fail (long_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
130 *long_p = value->data[0].v_long;
136 value_init_int64 (GValue *value)
138 value->data[0].v_int64 = 0;
142 value_copy_int64 (const GValue *src_value,
145 dest_value->data[0].v_int64 = src_value->data[0].v_int64;
149 value_collect_int64 (GValue *value,
150 guint n_collect_values,
151 GTypeCValue *collect_values,
154 value->data[0].v_int64 = collect_values[0].v_int64;
160 value_lcopy_int64 (const GValue *value,
161 guint n_collect_values,
162 GTypeCValue *collect_values,
165 gint64 *int64_p = collect_values[0].v_pointer;
167 g_return_val_if_fail (int64_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
169 *int64_p = value->data[0].v_int64;
175 value_init_float (GValue *value)
177 value->data[0].v_float = 0.0;
181 value_copy_float (const GValue *src_value,
184 dest_value->data[0].v_float = src_value->data[0].v_float;
188 value_collect_float (GValue *value,
189 guint n_collect_values,
190 GTypeCValue *collect_values,
193 value->data[0].v_float = collect_values[0].v_double;
199 value_lcopy_float (const GValue *value,
200 guint n_collect_values,
201 GTypeCValue *collect_values,
204 gfloat *float_p = collect_values[0].v_pointer;
206 g_return_val_if_fail (float_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
208 *float_p = value->data[0].v_float;
214 value_init_double (GValue *value)
216 value->data[0].v_double = 0.0;
220 value_copy_double (const GValue *src_value,
223 dest_value->data[0].v_double = src_value->data[0].v_double;
227 value_collect_double (GValue *value,
228 guint n_collect_values,
229 GTypeCValue *collect_values,
232 value->data[0].v_double = collect_values[0].v_double;
238 value_lcopy_double (const GValue *value,
239 guint n_collect_values,
240 GTypeCValue *collect_values,
243 gdouble *double_p = collect_values[0].v_pointer;
245 g_return_val_if_fail (double_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
247 *double_p = value->data[0].v_double;
253 value_init_string (GValue *value)
255 value->data[0].v_pointer = NULL;
259 value_free_string (GValue *value)
261 if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
262 g_free (value->data[0].v_pointer);
266 value_copy_string (const GValue *src_value,
269 if (src_value->data[1].v_uint & G_VALUE_INTERNED_STRING)
271 dest_value->data[0].v_pointer = src_value->data[0].v_pointer;
272 dest_value->data[1].v_uint = src_value->data[1].v_uint;
276 dest_value->data[0].v_pointer = g_strdup (src_value->data[0].v_pointer);
277 /* Don't copy over *any* flags, we're restarting from scratch */
282 value_collect_string (GValue *value,
283 guint n_collect_values,
284 GTypeCValue *collect_values,
287 if (!collect_values[0].v_pointer)
288 value->data[0].v_pointer = NULL;
289 else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
291 value->data[0].v_pointer = collect_values[0].v_pointer;
292 value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
295 value->data[0].v_pointer = g_strdup (collect_values[0].v_pointer);
301 value_lcopy_string (const GValue *value,
302 guint n_collect_values,
303 GTypeCValue *collect_values,
306 gchar **string_p = collect_values[0].v_pointer;
308 g_return_val_if_fail (string_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
310 if (!value->data[0].v_pointer)
312 else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
313 *string_p = value->data[0].v_pointer;
315 *string_p = g_strdup (value->data[0].v_pointer);
321 value_init_pointer (GValue *value)
323 value->data[0].v_pointer = NULL;
327 value_copy_pointer (const GValue *src_value,
330 dest_value->data[0].v_pointer = src_value->data[0].v_pointer;
334 value_peek_pointer0 (const GValue *value)
336 return value->data[0].v_pointer;
340 value_collect_pointer (GValue *value,
341 guint n_collect_values,
342 GTypeCValue *collect_values,
345 value->data[0].v_pointer = collect_values[0].v_pointer;
351 value_lcopy_pointer (const GValue *value,
352 guint n_collect_values,
353 GTypeCValue *collect_values,
356 gpointer *pointer_p = collect_values[0].v_pointer;
358 g_return_val_if_fail (pointer_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
360 *pointer_p = value->data[0].v_pointer;
366 value_free_variant (GValue *value)
368 if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS) &&
369 value->data[0].v_pointer)
370 g_variant_unref (value->data[0].v_pointer);
374 value_copy_variant (const GValue *src_value,
377 if (src_value->data[0].v_pointer)
378 dest_value->data[0].v_pointer = g_variant_ref_sink (src_value->data[0].v_pointer);
380 dest_value->data[0].v_pointer = NULL;
384 value_collect_variant (GValue *value,
385 guint n_collect_values,
386 GTypeCValue *collect_values,
389 if (!collect_values[0].v_pointer)
390 value->data[0].v_pointer = NULL;
392 /* never honour G_VALUE_NOCOPY_CONTENTS for ref-counted types */
393 value->data[0].v_pointer = g_variant_ref_sink (collect_values[0].v_pointer);
399 value_lcopy_variant (const GValue *value,
400 guint n_collect_values,
401 GTypeCValue *collect_values,
404 GVariant **variant_p = collect_values[0].v_pointer;
406 g_return_val_if_fail (variant_p != NULL, g_strdup_printf ("value location for '%s' passed as NULL", G_VALUE_TYPE_NAME (value)));
408 if (!value->data[0].v_pointer)
410 else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
411 *variant_p = value->data[0].v_pointer;
413 *variant_p = g_variant_ref_sink (value->data[0].v_pointer);
418 /* --- type initialization --- */
420 _g_value_types_init (void)
424 NULL, /* base_init */
425 NULL, /* base_destroy */
426 NULL, /* class_init */
427 NULL, /* class_destroy */
428 NULL, /* class_data */
429 0, /* instance_size */
431 NULL, /* instance_init */
432 NULL, /* value_table */
434 const GTypeFundamentalInfo finfo = { G_TYPE_FLAG_DERIVABLE, };
435 GType type G_GNUC_UNUSED /* when compiling with G_DISABLE_ASSERT */;
437 /* G_TYPE_CHAR / G_TYPE_UCHAR
440 static const GTypeValueTable value_table = {
441 value_init_long0, /* value_init */
442 NULL, /* value_free */
443 value_copy_long0, /* value_copy */
444 NULL, /* value_peek_pointer */
445 "i", /* collect_format */
446 value_collect_int, /* collect_value */
447 "p", /* lcopy_format */
448 value_lcopy_char, /* lcopy_value */
450 info.value_table = &value_table;
451 type = g_type_register_fundamental (G_TYPE_CHAR, g_intern_static_string ("gchar"), &info, &finfo, 0);
452 g_assert (type == G_TYPE_CHAR);
453 type = g_type_register_fundamental (G_TYPE_UCHAR, g_intern_static_string ("guchar"), &info, &finfo, 0);
454 g_assert (type == G_TYPE_UCHAR);
460 static const GTypeValueTable value_table = {
461 value_init_long0, /* value_init */
462 NULL, /* value_free */
463 value_copy_long0, /* value_copy */
464 NULL, /* value_peek_pointer */
465 "i", /* collect_format */
466 value_collect_int, /* collect_value */
467 "p", /* lcopy_format */
468 value_lcopy_boolean, /* lcopy_value */
470 info.value_table = &value_table;
471 type = g_type_register_fundamental (G_TYPE_BOOLEAN, g_intern_static_string ("gboolean"), &info, &finfo, 0);
472 g_assert (type == G_TYPE_BOOLEAN);
475 /* G_TYPE_INT / G_TYPE_UINT
478 static const GTypeValueTable value_table = {
479 value_init_long0, /* value_init */
480 NULL, /* value_free */
481 value_copy_long0, /* value_copy */
482 NULL, /* value_peek_pointer */
483 "i", /* collect_format */
484 value_collect_int, /* collect_value */
485 "p", /* lcopy_format */
486 value_lcopy_int, /* lcopy_value */
488 info.value_table = &value_table;
489 type = g_type_register_fundamental (G_TYPE_INT, g_intern_static_string ("gint"), &info, &finfo, 0);
490 g_assert (type == G_TYPE_INT);
491 type = g_type_register_fundamental (G_TYPE_UINT, g_intern_static_string ("guint"), &info, &finfo, 0);
492 g_assert (type == G_TYPE_UINT);
495 /* G_TYPE_LONG / G_TYPE_ULONG
498 static const GTypeValueTable value_table = {
499 value_init_long0, /* value_init */
500 NULL, /* value_free */
501 value_copy_long0, /* value_copy */
502 NULL, /* value_peek_pointer */
503 "l", /* collect_format */
504 value_collect_long, /* collect_value */
505 "p", /* lcopy_format */
506 value_lcopy_long, /* lcopy_value */
508 info.value_table = &value_table;
509 type = g_type_register_fundamental (G_TYPE_LONG, g_intern_static_string ("glong"), &info, &finfo, 0);
510 g_assert (type == G_TYPE_LONG);
511 type = g_type_register_fundamental (G_TYPE_ULONG, g_intern_static_string ("gulong"), &info, &finfo, 0);
512 g_assert (type == G_TYPE_ULONG);
515 /* G_TYPE_INT64 / G_TYPE_UINT64
518 static const GTypeValueTable value_table = {
519 value_init_int64, /* value_init */
520 NULL, /* value_free */
521 value_copy_int64, /* value_copy */
522 NULL, /* value_peek_pointer */
523 "q", /* collect_format */
524 value_collect_int64, /* collect_value */
525 "p", /* lcopy_format */
526 value_lcopy_int64, /* lcopy_value */
528 info.value_table = &value_table;
529 type = g_type_register_fundamental (G_TYPE_INT64, g_intern_static_string ("gint64"), &info, &finfo, 0);
530 g_assert (type == G_TYPE_INT64);
531 type = g_type_register_fundamental (G_TYPE_UINT64, g_intern_static_string ("guint64"), &info, &finfo, 0);
532 g_assert (type == G_TYPE_UINT64);
538 static const GTypeValueTable value_table = {
539 value_init_float, /* value_init */
540 NULL, /* value_free */
541 value_copy_float, /* value_copy */
542 NULL, /* value_peek_pointer */
543 "d", /* collect_format */
544 value_collect_float, /* collect_value */
545 "p", /* lcopy_format */
546 value_lcopy_float, /* lcopy_value */
548 info.value_table = &value_table;
549 type = g_type_register_fundamental (G_TYPE_FLOAT, g_intern_static_string ("gfloat"), &info, &finfo, 0);
550 g_assert (type == G_TYPE_FLOAT);
556 static const GTypeValueTable value_table = {
557 value_init_double, /* value_init */
558 NULL, /* value_free */
559 value_copy_double, /* value_copy */
560 NULL, /* value_peek_pointer */
561 "d", /* collect_format */
562 value_collect_double, /* collect_value */
563 "p", /* lcopy_format */
564 value_lcopy_double, /* lcopy_value */
566 info.value_table = &value_table;
567 type = g_type_register_fundamental (G_TYPE_DOUBLE, g_intern_static_string ("gdouble"), &info, &finfo, 0);
568 g_assert (type == G_TYPE_DOUBLE);
574 static const GTypeValueTable value_table = {
575 value_init_string, /* value_init */
576 value_free_string, /* value_free */
577 value_copy_string, /* value_copy */
578 value_peek_pointer0, /* value_peek_pointer */
579 "p", /* collect_format */
580 value_collect_string, /* collect_value */
581 "p", /* lcopy_format */
582 value_lcopy_string, /* lcopy_value */
584 info.value_table = &value_table;
585 type = g_type_register_fundamental (G_TYPE_STRING, g_intern_static_string ("gchararray"), &info, &finfo, 0);
586 g_assert (type == G_TYPE_STRING);
592 static const GTypeValueTable value_table = {
593 value_init_pointer, /* value_init */
594 NULL, /* value_free */
595 value_copy_pointer, /* value_copy */
596 value_peek_pointer0, /* value_peek_pointer */
597 "p", /* collect_format */
598 value_collect_pointer, /* collect_value */
599 "p", /* lcopy_format */
600 value_lcopy_pointer, /* lcopy_value */
602 info.value_table = &value_table;
603 type = g_type_register_fundamental (G_TYPE_POINTER, g_intern_static_string ("gpointer"), &info, &finfo, 0);
604 g_assert (type == G_TYPE_POINTER);
610 static const GTypeValueTable value_table = {
611 value_init_pointer, /* value_init */
612 value_free_variant, /* value_free */
613 value_copy_variant, /* value_copy */
614 value_peek_pointer0, /* value_peek_pointer */
615 "p", /* collect_format */
616 value_collect_variant, /* collect_value */
617 "p", /* lcopy_format */
618 value_lcopy_variant, /* lcopy_value */
620 info.value_table = &value_table;
621 type = g_type_register_fundamental (G_TYPE_VARIANT, g_intern_static_string ("GVariant"), &info, &finfo, 0);
622 g_assert (type == G_TYPE_VARIANT);
627 /* --- GValue functions --- */
630 * @value: a valid #GValue of type %G_TYPE_CHAR
631 * @v_char: character value to be set
633 * Set the contents of a %G_TYPE_CHAR #GValue to @v_char.
634 * Deprecated: 2.32: This function's input type is broken, see g_value_set_schar()
637 g_value_set_char (GValue *value,
640 g_return_if_fail (G_VALUE_HOLDS_CHAR (value));
642 value->data[0].v_int = v_char;
647 * @value: a valid #GValue of type %G_TYPE_CHAR
649 * Do not use this function; it is broken on platforms where the %char
650 * type is unsigned, such as ARM and PowerPC. See g_value_get_schar().
652 * Get the contents of a %G_TYPE_CHAR #GValue.
654 * Returns: character contents of @value
655 * Deprecated: 2.32: This function's return type is broken, see g_value_get_schar()
658 g_value_get_char (const GValue *value)
660 g_return_val_if_fail (G_VALUE_HOLDS_CHAR (value), 0);
662 return value->data[0].v_int;
667 * @value: a valid #GValue of type %G_TYPE_CHAR
668 * @v_char: signed 8 bit integer to be set
670 * Set the contents of a %G_TYPE_CHAR #GValue to @v_char.
675 g_value_set_schar (GValue *value,
678 g_return_if_fail (G_VALUE_HOLDS_CHAR (value));
680 value->data[0].v_int = v_char;
685 * @value: a valid #GValue of type %G_TYPE_CHAR
687 * Get the contents of a %G_TYPE_CHAR #GValue.
689 * Returns: signed 8 bit integer contents of @value
693 g_value_get_schar (const GValue *value)
695 g_return_val_if_fail (G_VALUE_HOLDS_CHAR (value), 0);
697 return value->data[0].v_int;
702 * @value: a valid #GValue of type %G_TYPE_UCHAR
703 * @v_uchar: unsigned character value to be set
705 * Set the contents of a %G_TYPE_UCHAR #GValue to @v_uchar.
708 g_value_set_uchar (GValue *value,
711 g_return_if_fail (G_VALUE_HOLDS_UCHAR (value));
713 value->data[0].v_uint = v_uchar;
718 * @value: a valid #GValue of type %G_TYPE_UCHAR
720 * Get the contents of a %G_TYPE_UCHAR #GValue.
722 * Returns: unsigned character contents of @value
725 g_value_get_uchar (const GValue *value)
727 g_return_val_if_fail (G_VALUE_HOLDS_UCHAR (value), 0);
729 return value->data[0].v_uint;
733 * g_value_set_boolean:
734 * @value: a valid #GValue of type %G_TYPE_BOOLEAN
735 * @v_boolean: boolean value to be set
737 * Set the contents of a %G_TYPE_BOOLEAN #GValue to @v_boolean.
740 g_value_set_boolean (GValue *value,
743 g_return_if_fail (G_VALUE_HOLDS_BOOLEAN (value));
745 value->data[0].v_int = v_boolean != FALSE;
749 * g_value_get_boolean:
750 * @value: a valid #GValue of type %G_TYPE_BOOLEAN
752 * Get the contents of a %G_TYPE_BOOLEAN #GValue.
754 * Returns: boolean contents of @value
757 g_value_get_boolean (const GValue *value)
759 g_return_val_if_fail (G_VALUE_HOLDS_BOOLEAN (value), 0);
761 return value->data[0].v_int;
766 * @value: a valid #GValue of type %G_TYPE_INT
767 * @v_int: integer value to be set
769 * Set the contents of a %G_TYPE_INT #GValue to @v_int.
772 g_value_set_int (GValue *value,
775 g_return_if_fail (G_VALUE_HOLDS_INT (value));
777 value->data[0].v_int = v_int;
782 * @value: a valid #GValue of type %G_TYPE_INT
784 * Get the contents of a %G_TYPE_INT #GValue.
786 * Returns: integer contents of @value
789 g_value_get_int (const GValue *value)
791 g_return_val_if_fail (G_VALUE_HOLDS_INT (value), 0);
793 return value->data[0].v_int;
798 * @value: a valid #GValue of type %G_TYPE_UINT
799 * @v_uint: unsigned integer value to be set
801 * Set the contents of a %G_TYPE_UINT #GValue to @v_uint.
804 g_value_set_uint (GValue *value,
807 g_return_if_fail (G_VALUE_HOLDS_UINT (value));
809 value->data[0].v_uint = v_uint;
814 * @value: a valid #GValue of type %G_TYPE_UINT
816 * Get the contents of a %G_TYPE_UINT #GValue.
818 * Returns: unsigned integer contents of @value
821 g_value_get_uint (const GValue *value)
823 g_return_val_if_fail (G_VALUE_HOLDS_UINT (value), 0);
825 return value->data[0].v_uint;
830 * @value: a valid #GValue of type %G_TYPE_LONG
831 * @v_long: long integer value to be set
833 * Set the contents of a %G_TYPE_LONG #GValue to @v_long.
836 g_value_set_long (GValue *value,
839 g_return_if_fail (G_VALUE_HOLDS_LONG (value));
841 value->data[0].v_long = v_long;
846 * @value: a valid #GValue of type %G_TYPE_LONG
848 * Get the contents of a %G_TYPE_LONG #GValue.
850 * Returns: long integer contents of @value
853 g_value_get_long (const GValue *value)
855 g_return_val_if_fail (G_VALUE_HOLDS_LONG (value), 0);
857 return value->data[0].v_long;
862 * @value: a valid #GValue of type %G_TYPE_ULONG
863 * @v_ulong: unsigned long integer value to be set
865 * Set the contents of a %G_TYPE_ULONG #GValue to @v_ulong.
868 g_value_set_ulong (GValue *value,
871 g_return_if_fail (G_VALUE_HOLDS_ULONG (value));
873 value->data[0].v_ulong = v_ulong;
878 * @value: a valid #GValue of type %G_TYPE_ULONG
880 * Get the contents of a %G_TYPE_ULONG #GValue.
882 * Returns: unsigned long integer contents of @value
885 g_value_get_ulong (const GValue *value)
887 g_return_val_if_fail (G_VALUE_HOLDS_ULONG (value), 0);
889 return value->data[0].v_ulong;
894 * @value: a valid #GValue of type %G_TYPE_INT64
896 * Get the contents of a %G_TYPE_INT64 #GValue.
898 * Returns: 64bit integer contents of @value
901 g_value_set_int64 (GValue *value,
904 g_return_if_fail (G_VALUE_HOLDS_INT64 (value));
906 value->data[0].v_int64 = v_int64;
911 * @value: a valid #GValue of type %G_TYPE_INT64
912 * @v_int64: 64bit integer value to be set
914 * Set the contents of a %G_TYPE_INT64 #GValue to @v_int64.
917 g_value_get_int64 (const GValue *value)
919 g_return_val_if_fail (G_VALUE_HOLDS_INT64 (value), 0);
921 return value->data[0].v_int64;
925 * g_value_set_uint64:
926 * @value: a valid #GValue of type %G_TYPE_UINT64
927 * @v_uint64: unsigned 64bit integer value to be set
929 * Set the contents of a %G_TYPE_UINT64 #GValue to @v_uint64.
932 g_value_set_uint64 (GValue *value,
935 g_return_if_fail (G_VALUE_HOLDS_UINT64 (value));
937 value->data[0].v_uint64 = v_uint64;
941 * g_value_get_uint64:
942 * @value: a valid #GValue of type %G_TYPE_UINT64
944 * Get the contents of a %G_TYPE_UINT64 #GValue.
946 * Returns: unsigned 64bit integer contents of @value
949 g_value_get_uint64 (const GValue *value)
951 g_return_val_if_fail (G_VALUE_HOLDS_UINT64 (value), 0);
953 return value->data[0].v_uint64;
958 * @value: a valid #GValue of type %G_TYPE_FLOAT
959 * @v_float: float value to be set
961 * Set the contents of a %G_TYPE_FLOAT #GValue to @v_float.
964 g_value_set_float (GValue *value,
967 g_return_if_fail (G_VALUE_HOLDS_FLOAT (value));
969 value->data[0].v_float = v_float;
974 * @value: a valid #GValue of type %G_TYPE_FLOAT
976 * Get the contents of a %G_TYPE_FLOAT #GValue.
978 * Returns: float contents of @value
981 g_value_get_float (const GValue *value)
983 g_return_val_if_fail (G_VALUE_HOLDS_FLOAT (value), 0);
985 return value->data[0].v_float;
989 * g_value_set_double:
990 * @value: a valid #GValue of type %G_TYPE_DOUBLE
991 * @v_double: double value to be set
993 * Set the contents of a %G_TYPE_DOUBLE #GValue to @v_double.
996 g_value_set_double (GValue *value,
999 g_return_if_fail (G_VALUE_HOLDS_DOUBLE (value));
1001 value->data[0].v_double = v_double;
1005 * g_value_get_double:
1006 * @value: a valid #GValue of type %G_TYPE_DOUBLE
1008 * Get the contents of a %G_TYPE_DOUBLE #GValue.
1010 * Returns: double contents of @value
1013 g_value_get_double (const GValue *value)
1015 g_return_val_if_fail (G_VALUE_HOLDS_DOUBLE (value), 0);
1017 return value->data[0].v_double;
1021 * g_value_set_string:
1022 * @value: a valid #GValue of type %G_TYPE_STRING
1023 * @v_string: (nullable): caller-owned string to be duplicated for the #GValue
1025 * Set the contents of a %G_TYPE_STRING #GValue to a copy of @v_string.
1028 g_value_set_string (GValue *value,
1029 const gchar *v_string)
1033 g_return_if_fail (G_VALUE_HOLDS_STRING (value));
1035 new_val = g_strdup (v_string);
1037 if (value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS)
1038 value->data[1].v_uint = 0;
1040 g_free (value->data[0].v_pointer);
1042 value->data[0].v_pointer = new_val;
1046 * g_value_set_static_string:
1047 * @value: a valid #GValue of type %G_TYPE_STRING
1048 * @v_string: (nullable): static string to be set
1050 * Set the contents of a %G_TYPE_STRING #GValue to @v_string.
1051 * The string is assumed to be static, and is thus not duplicated
1052 * when setting the #GValue.
1054 * If the the string is a canonical string, using g_value_set_interned_string()
1055 * is more appropriate.
1058 g_value_set_static_string (GValue *value,
1059 const gchar *v_string)
1061 g_return_if_fail (G_VALUE_HOLDS_STRING (value));
1063 if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
1064 g_free (value->data[0].v_pointer);
1065 value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
1066 value->data[0].v_pointer = (gchar*) v_string;
1070 * g_value_set_interned_string:
1071 * @value: a valid #GValue of type %G_TYPE_STRING
1072 * @v_string: (nullable): static string to be set
1074 * Set the contents of a %G_TYPE_STRING #GValue to @v_string. The string is
1075 * assumed to be static and interned (canonical, for example from
1076 * g_intern_string()), and is thus not duplicated when setting the #GValue.
1081 g_value_set_interned_string (GValue *value,
1082 const gchar *v_string)
1084 g_return_if_fail (G_VALUE_HOLDS_STRING (value));
1086 if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
1087 g_free (value->data[0].v_pointer);
1088 value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS | G_VALUE_INTERNED_STRING;
1089 value->data[0].v_pointer = (gchar *) v_string;
1093 * g_value_set_string_take_ownership:
1094 * @value: a valid #GValue of type %G_TYPE_STRING
1095 * @v_string: (nullable): duplicated unowned string to be set
1097 * This is an internal function introduced mainly for C marshallers.
1099 * Deprecated: 2.4: Use g_value_take_string() instead.
1102 g_value_set_string_take_ownership (GValue *value,
1105 g_value_take_string (value, v_string);
1109 * g_value_take_string:
1110 * @value: a valid #GValue of type %G_TYPE_STRING
1111 * @v_string: (nullable) (transfer full): string to take ownership of
1113 * Sets the contents of a %G_TYPE_STRING #GValue to @v_string.
1118 g_value_take_string (GValue *value,
1121 g_return_if_fail (G_VALUE_HOLDS_STRING (value));
1123 if (value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS)
1124 value->data[1].v_uint = 0;
1126 g_free (value->data[0].v_pointer);
1127 value->data[0].v_pointer = v_string;
1131 * g_value_get_string:
1132 * @value: a valid #GValue of type %G_TYPE_STRING
1134 * Get the contents of a %G_TYPE_STRING #GValue.
1136 * Returns: (nullable) (transfer none): string content of @value
1139 g_value_get_string (const GValue *value)
1141 g_return_val_if_fail (G_VALUE_HOLDS_STRING (value), NULL);
1143 return value->data[0].v_pointer;
1147 * g_value_dup_string:
1148 * @value: a valid #GValue of type %G_TYPE_STRING
1150 * Get a copy the contents of a %G_TYPE_STRING #GValue.
1152 * Returns: (nullable) (transfer full): a newly allocated copy of the string content of @value
1155 g_value_dup_string (const GValue *value)
1157 g_return_val_if_fail (G_VALUE_HOLDS_STRING (value), NULL);
1159 return g_strdup (value->data[0].v_pointer);
1163 * g_value_set_pointer:
1164 * @value: a valid #GValue of %G_TYPE_POINTER
1165 * @v_pointer: pointer value to be set
1167 * Set the contents of a pointer #GValue to @v_pointer.
1170 g_value_set_pointer (GValue *value,
1173 g_return_if_fail (G_VALUE_HOLDS_POINTER (value));
1175 value->data[0].v_pointer = v_pointer;
1179 * g_value_get_pointer:
1180 * @value: a valid #GValue of %G_TYPE_POINTER
1182 * Get the contents of a pointer #GValue.
1184 * Returns: (transfer none): pointer contents of @value
1187 g_value_get_pointer (const GValue *value)
1189 g_return_val_if_fail (G_VALUE_HOLDS_POINTER (value), NULL);
1191 return value->data[0].v_pointer;
1194 G_DEFINE_POINTER_TYPE (GType, g_gtype)
1197 * g_value_set_gtype:
1198 * @value: a valid #GValue of type %G_TYPE_GTYPE
1199 * @v_gtype: #GType to be set
1201 * Set the contents of a %G_TYPE_GTYPE #GValue to @v_gtype.
1206 g_value_set_gtype (GValue *value,
1209 g_return_if_fail (G_VALUE_HOLDS_GTYPE (value));
1211 value->data[0].v_pointer = GSIZE_TO_POINTER (v_gtype);
1216 * g_value_get_gtype:
1217 * @value: a valid #GValue of type %G_TYPE_GTYPE
1219 * Get the contents of a %G_TYPE_GTYPE #GValue.
1223 * Returns: the #GType stored in @value
1226 g_value_get_gtype (const GValue *value)
1228 g_return_val_if_fail (G_VALUE_HOLDS_GTYPE (value), 0);
1230 return GPOINTER_TO_SIZE (value->data[0].v_pointer);
1234 * g_value_set_variant:
1235 * @value: a valid #GValue of type %G_TYPE_VARIANT
1236 * @variant: (nullable): a #GVariant, or %NULL
1238 * Set the contents of a variant #GValue to @variant.
1239 * If the variant is floating, it is consumed.
1244 g_value_set_variant (GValue *value,
1247 GVariant *old_variant;
1249 g_return_if_fail (G_VALUE_HOLDS_VARIANT (value));
1251 old_variant = value->data[0].v_pointer;
1254 value->data[0].v_pointer = g_variant_ref_sink (variant);
1256 value->data[0].v_pointer = NULL;
1259 g_variant_unref (old_variant);
1263 * g_value_take_variant:
1264 * @value: a valid #GValue of type %G_TYPE_VARIANT
1265 * @variant: (nullable) (transfer full): a #GVariant, or %NULL
1267 * Set the contents of a variant #GValue to @variant, and takes over
1268 * the ownership of the caller's reference to @variant;
1269 * the caller doesn't have to unref it any more (i.e. the reference
1270 * count of the variant is not increased).
1272 * If @variant was floating then its floating reference is converted to
1275 * If you want the #GValue to hold its own reference to @variant, use
1276 * g_value_set_variant() instead.
1278 * This is an internal function introduced mainly for C marshallers.
1283 g_value_take_variant (GValue *value,
1286 GVariant *old_variant;
1288 g_return_if_fail (G_VALUE_HOLDS_VARIANT (value));
1290 old_variant = value->data[0].v_pointer;
1293 value->data[0].v_pointer = g_variant_take_ref (variant);
1295 value->data[0].v_pointer = NULL;
1298 g_variant_unref (old_variant);
1302 * g_value_get_variant:
1303 * @value: a valid #GValue of type %G_TYPE_VARIANT
1305 * Get the contents of a variant #GValue.
1307 * Returns: (transfer none) (nullable): variant contents of @value (may be %NULL)
1312 g_value_get_variant (const GValue *value)
1314 g_return_val_if_fail (G_VALUE_HOLDS_VARIANT (value), NULL);
1316 return value->data[0].v_pointer;
1320 * g_value_dup_variant:
1321 * @value: a valid #GValue of type %G_TYPE_VARIANT
1323 * Get the contents of a variant #GValue, increasing its refcount. The returned
1324 * #GVariant is never floating.
1326 * Returns: (transfer full) (nullable): variant contents of @value (may be %NULL);
1327 * should be unreffed using g_variant_unref() when no longer needed
1332 g_value_dup_variant (const GValue *value)
1336 g_return_val_if_fail (G_VALUE_HOLDS_VARIANT (value), NULL);
1338 variant = value->data[0].v_pointer;
1340 g_variant_ref_sink (variant);
1346 * g_strdup_value_contents:
1347 * @value: #GValue which contents are to be described.
1349 * Return a newly allocated string, which describes the contents of a
1350 * #GValue. The main purpose of this function is to describe #GValue
1351 * contents for debugging output, the way in which the contents are
1352 * described may change between different GLib versions.
1354 * Returns: Newly allocated string.
1357 g_strdup_value_contents (const GValue *value)
1362 g_return_val_if_fail (G_IS_VALUE (value), NULL);
1364 if (G_VALUE_HOLDS_STRING (value))
1366 src = g_value_get_string (value);
1369 contents = g_strdup ("NULL");
1372 gchar *s = g_strescape (src, NULL);
1374 contents = g_strdup_printf ("\"%s\"", s);
1378 else if (g_value_type_transformable (G_VALUE_TYPE (value), G_TYPE_STRING))
1380 GValue tmp_value = G_VALUE_INIT;
1383 g_value_init (&tmp_value, G_TYPE_STRING);
1384 g_value_transform (value, &tmp_value);
1385 s = g_strescape (g_value_get_string (&tmp_value), NULL);
1386 g_value_unset (&tmp_value);
1387 if (G_VALUE_HOLDS_ENUM (value) || G_VALUE_HOLDS_FLAGS (value))
1388 contents = g_strdup_printf ("((%s) %s)",
1389 g_type_name (G_VALUE_TYPE (value)),
1392 contents = g_strdup (s ? s : "NULL");
1395 else if (g_value_fits_pointer (value))
1397 gpointer p = g_value_peek_pointer (value);
1400 contents = g_strdup ("NULL");
1401 else if (G_VALUE_HOLDS_OBJECT (value))
1402 contents = g_strdup_printf ("((%s*) %p)", G_OBJECT_TYPE_NAME (p), p);
1403 else if (G_VALUE_HOLDS_PARAM (value))
1404 contents = g_strdup_printf ("((%s*) %p)", G_PARAM_SPEC_TYPE_NAME (p), p);
1405 else if (G_VALUE_HOLDS (value, G_TYPE_STRV))
1407 GStrv strv = g_value_get_boxed (value);
1408 GString *tmp = g_string_new ("[");
1410 while (*strv != NULL)
1412 gchar *escaped = g_strescape (*strv, NULL);
1414 g_string_append_printf (tmp, "\"%s\"", escaped);
1417 if (*++strv != NULL)
1418 g_string_append (tmp, ", ");
1421 g_string_append (tmp, "]");
1422 contents = g_string_free (tmp, FALSE);
1424 else if (G_VALUE_HOLDS_BOXED (value))
1425 contents = g_strdup_printf ("((%s*) %p)", g_type_name (G_VALUE_TYPE (value)), p);
1426 else if (G_VALUE_HOLDS_POINTER (value))
1427 contents = g_strdup_printf ("((gpointer) %p)", p);
1429 contents = g_strdup ("???");
1432 contents = g_strdup ("???");
1438 * g_pointer_type_register_static:
1439 * @name: the name of the new pointer type.
1441 * Creates a new %G_TYPE_POINTER derived type id for a new
1442 * pointer type with name @name.
1444 * Returns: a new %G_TYPE_POINTER derived type id for @name.
1447 g_pointer_type_register_static (const gchar *name)
1449 const GTypeInfo type_info = {
1451 NULL, /* base_init */
1452 NULL, /* base_finalize */
1453 NULL, /* class_init */
1454 NULL, /* class_finalize */
1455 NULL, /* class_data */
1456 0, /* instance_size */
1457 0, /* n_preallocs */
1458 NULL, /* instance_init */
1459 NULL /* value_table */
1463 g_return_val_if_fail (name != NULL, 0);
1464 g_return_val_if_fail (g_type_from_name (name) == 0, 0);
1466 type = g_type_register_static (G_TYPE_POINTER, name, &type_info, 0);