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value: Add G_VALUE_COLLECT_INIT2

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Add a variant of the G_VALUE_COLLECT_INIT() macro
that provides the GTypeValueTable to the caller.
This commit is contained in:
Matthias Clasen 2022-05-20 07:53:42 -04:00
parent 568eeda6c9
commit aaef7f30b3
2 changed files with 28 additions and 4 deletions
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1
docs/reference/gobject/gobject-sections.txt
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@ -813,6 +813,7 @@ g_param_spec_types
<INCLUDE>glib-object.h,gobject/gvaluecollector.h</INCLUDE>
GTypeCValue
G_VALUE_COLLECT_INIT
G_VALUE_COLLECT_INIT2
G_VALUE_COLLECT
G_VALUE_COLLECT_SKIP
G_VALUE_LCOPY

31
gobject/gvaluecollector.h
View File

@ -87,15 +87,38 @@ union _GTypeCValue
*
* Since: 2.24
*/
#define G_VALUE_COLLECT_INIT(value, _value_type, var_args, flags, __error) \
#define G_VALUE_COLLECT_INIT(value, _value_type, var_args, flags, __error) \
G_STMT_START { \
GTypeValueTable *g_vci_vtab; \
G_VALUE_COLLECT_INIT2(value, g_vci_vtab, _value_type, var_args, flags, __error); \
} G_STMT_END
/**
* G_VALUE_COLLECT_INIT2:
* @value: a #GValue return location. @value must contain only 0 bytes.
* @g_vci_vtab: a #GTypeValueTable pointer that will be set to the value table
* for @_value_type
* @_value_type: the #GType to use for @value.
* @var_args: the va_list variable; it may be evaluated multiple times
* @flags: flags which are passed on to the collect_value() function of
* the #GTypeValueTable of @value.
* @__error: a #gchar** variable that will be modified to hold a g_new()
* allocated error messages if something fails
*
* A variant of G_VALUE_COLLECT_INIT() that provides the #GTypeValueTable
* to the caller.
*
* Since: 2.74
*/
#define G_VALUE_COLLECT_INIT2(value, g_vci_vtab, _value_type, var_args, flags, __error) \
G_STMT_START { \
GValue *g_vci_val = (value); \
guint g_vci_flags = (flags); \
GTypeValueTable *g_vci_vtab = g_type_value_table_peek (_value_type); \
const gchar *g_vci_collect_format = g_vci_vtab->collect_format; \
const gchar *g_vci_collect_format; \
GTypeCValue g_vci_cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \
guint g_vci_n_values = 0; \
\
g_vci_vtab = g_type_value_table_peek (_value_type); \
g_vci_collect_format = g_vci_vtab->collect_format; \
g_vci_val->g_type = _value_type; /* value_meminit() from gvalue.c */ \
while (*g_vci_collect_format) \
{ \