author | hgs |
Tue, 02 Nov 2010 19:23:22 +0530 | |
changeset 79 | 564bc7b7ad27 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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/* GObject - GLib Type, Object, Parameter and Signal Library |
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* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc. |
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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 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 |
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* Public License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
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* Boston, MA 02111-1307, USA. |
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* |
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* gvaluecollector.h: GValue varargs stubs |
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*/ |
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#ifndef __G_VALUE_COLLECTOR_H__ |
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#define __G_VALUE_COLLECTOR_H__ |
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|
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#include <glib-object.h> |
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|
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G_BEGIN_DECLS |
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|
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/* we may want to add aggregate types here some day, if requested |
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* by users. the basic C types are covered already, everything |
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* smaller than an int is promoted to an integer and floats are |
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* always promoted to doubles for varargs call constructions. |
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*/ |
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enum /*< skip >*/ |
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{ |
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G_VALUE_COLLECT_INT = 'i', |
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G_VALUE_COLLECT_LONG = 'l', |
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G_VALUE_COLLECT_INT64 = 'q', |
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G_VALUE_COLLECT_DOUBLE = 'd', |
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G_VALUE_COLLECT_POINTER = 'p' |
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}; |
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|
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|
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/* vararg union holding actuall values collected |
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*/ |
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union _GTypeCValue |
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{ |
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gint v_int; |
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glong v_long; |
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gint64 v_int64; |
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gdouble v_double; |
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gpointer v_pointer; |
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}; |
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|
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|
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/* G_VALUE_COLLECT() collects a variable argument value |
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* from a va_list. we have to implement the varargs collection as a |
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* macro, because on some systems va_list variables cannot be passed |
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* by reference. |
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* value is supposed to be initialized according to the value |
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* type to be collected. |
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* var_args is the va_list variable and may be evaluated multiple times. |
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* __error is a gchar** variable that will be modified to hold a g_new() |
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* allocated error messages if something fails. |
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*/ |
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#define G_VALUE_COLLECT(value, var_args, flags, __error) \ |
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G_STMT_START { \ |
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GValue *_value = (value); \ |
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guint _flags = (flags); \ |
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GType _value_type = G_VALUE_TYPE (_value); \ |
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GTypeValueTable *_vtable = g_type_value_table_peek (_value_type); \ |
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gchar *_collect_format = _vtable->collect_format; \ |
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GTypeCValue _cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \ |
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guint _n_values = 0; \ |
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\ |
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if (_vtable->value_free) \ |
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_vtable->value_free (_value); \ |
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_value->g_type = _value_type; /* value_meminit() from gvalue.c */ \ |
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memset (_value->data, 0, sizeof (_value->data)); \ |
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while (*_collect_format) \ |
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{ \ |
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GTypeCValue *_cvalue = _cvalues + _n_values++; \ |
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\ |
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switch (*_collect_format++) \ |
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{ \ |
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case G_VALUE_COLLECT_INT: \ |
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_cvalue->v_int = va_arg ((var_args), gint); \ |
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break; \ |
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case G_VALUE_COLLECT_LONG: \ |
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_cvalue->v_long = va_arg ((var_args), glong); \ |
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break; \ |
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case G_VALUE_COLLECT_INT64: \ |
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_cvalue->v_int64 = va_arg ((var_args), gint64); \ |
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break; \ |
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case G_VALUE_COLLECT_DOUBLE: \ |
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_cvalue->v_double = va_arg ((var_args), gdouble); \ |
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break; \ |
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case G_VALUE_COLLECT_POINTER: \ |
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_cvalue->v_pointer = va_arg ((var_args), gpointer); \ |
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break; \ |
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default: \ |
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g_assert_not_reached (); \ |
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} \ |
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} \ |
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*(__error) = _vtable->collect_value (_value, \ |
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_n_values, \ |
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_cvalues, \ |
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_flags); \ |
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} G_STMT_END |
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109 |
|
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|
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/* G_VALUE_LCOPY() collects a value's variable argument |
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* locations from a va_list. usage is analogous to G_VALUE_COLLECT(). |
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*/ |
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#define G_VALUE_LCOPY(value, var_args, flags, __error) \ |
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G_STMT_START { \ |
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const GValue *_value = (value); \ |
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guint _flags = (flags); \ |
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GType _value_type = G_VALUE_TYPE (_value); \ |
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GTypeValueTable *_vtable = g_type_value_table_peek (_value_type); \ |
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gchar *_lcopy_format = _vtable->lcopy_format; \ |
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GTypeCValue _cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \ |
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guint _n_values = 0; \ |
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\ |
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while (*_lcopy_format) \ |
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{ \ |
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GTypeCValue *_cvalue = _cvalues + _n_values++; \ |
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\ |
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switch (*_lcopy_format++) \ |
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{ \ |
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case G_VALUE_COLLECT_INT: \ |
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_cvalue->v_int = va_arg ((var_args), gint); \ |
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break; \ |
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case G_VALUE_COLLECT_LONG: \ |
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_cvalue->v_long = va_arg ((var_args), glong); \ |
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break; \ |
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case G_VALUE_COLLECT_INT64: \ |
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_cvalue->v_int64 = va_arg ((var_args), gint64); \ |
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break; \ |
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case G_VALUE_COLLECT_DOUBLE: \ |
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_cvalue->v_double = va_arg ((var_args), gdouble); \ |
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break; \ |
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case G_VALUE_COLLECT_POINTER: \ |
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_cvalue->v_pointer = va_arg ((var_args), gpointer); \ |
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break; \ |
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default: \ |
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g_assert_not_reached (); \ |
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} \ |
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} \ |
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*(__error) = _vtable->lcopy_value (_value, \ |
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_n_values, \ |
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_cvalues, \ |
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_flags); \ |
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} G_STMT_END |
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|
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|
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#define G_VALUE_COLLECT_FORMAT_MAX_LENGTH (8) |
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|
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G_END_DECLS |
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|
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#endif /* __G_VALUE_COLLECTOR_H__ */ |