| GObject Reference Manual |
|---|
Varargs Value CollectionVarargs Value Collection — Converting varargs to generic values |
#include <glib-object.h> #include <gobject/gvaluecollector.h> union GTypeCValue; #define G_VALUE_COLLECT (value, var_args, flags, __error) #define G_VALUE_LCOPY (value, var_args, flags, __error) #define G_VALUE_COLLECT_FORMAT_MAX_LENGTH
union GTypeCValue
{
gint v_int;
glong v_long;
gint64 v_int64;
gdouble v_double;
gpointer v_pointer;
};
A union holding one collected value.
#define G_VALUE_COLLECT(value, var_args, flags, __error)
Collects a variable argument value from a va_list. We have to implement the varargs collection as a macro, because on some systems va_list variables cannot be passed by reference.
| value : | a GValue return location. value is supposed to be initialized according to the value type to be collected |
| 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 |
#define G_VALUE_LCOPY(value, var_args, flags, __error)
Collects a value's variable argument locations from a va_list.
| value : | a GValue return location. value is supposed to be initialized according to the value type to be collected |
| var_args : | the va_list variable; it may be evaluated multiple times |
| flags : | flags which are passed on to the lcopy_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 |
#define G_VALUE_COLLECT_FORMAT_MAX_LENGTH (8)
The maximal number of GTypeCValues which can be collected for a single GValue.
| << Parameters and Values | GParamSpec >> |