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/*
* Copyright (C) 2012 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef INCL_GVALUE_SUPPORT
#define INCL_GVALUE_SUPPORT
#include <glib-object.h>
#include <syncevo/GLibSupport.h>
#include <syncevo/declarations.h>
SE_BEGIN_CXX
/**
* Base C++ wrapper for GValue. Owns the data stored in it.
* init() must be called before using it.
*/
class GValueCXX : public GValue
{
public:
GValueCXX() { memset(static_cast<GValue *>(this), 0, sizeof(GValue)); }
GValueCXX(const GValue &other) {
memset(static_cast<GValue *>(this), 0, sizeof(GValue));
*this = other;
}
~GValueCXX() { g_value_unset(this); }
void init(GType gType) { g_value_init(this, gType); }
GValueCXX &operator = (const GValue &other) {
if (&other != this) {
g_value_copy(&other, this);
}
return *this;
}
/** text representation, for debugging */
PlainGStr toString() const {
PlainGStr str(g_strdup_value_contents(this));
return str;
}
/**
* A GDestroyNotify for dynamically allocated GValueCXX instances,
* for use in containers like GHashTable.
*/
static void destroy(gpointer gvaluecxx) {
delete static_cast<GValueCXX *>(gvaluecxx);
}
};
template<class C> void dummyTake(GValue *, C);
template<class C> void dummySetStatic(GValue *, const C);
/**
* Declares a C++ wrapper for a GValue containing a specific
* GType.
*/
template<
class nativeType,
class constNativeType,
GType gType,
void (*setGValue)(GValue *, constNativeType),
constNativeType (*getFromGValue)(const GValue *),
void (*takeIntoGValue)(GValue *, nativeType) = dummyTake<nativeType>,
void (*setStaticInGValue)(GValue *, constNativeType) = dummySetStatic<constNativeType>
> class GValueTypedCXX : public GValueCXX
{
public:
typedef GValueTypedCXX<nativeType, constNativeType, gType, setGValue, getFromGValue, takeIntoGValue, setStaticInGValue> value_type;
/**
* prepare value, without setting it (isSet() will return false)
*/
GValueTypedCXX() {
init(gType);
}
/**
* copy other value, referencing (GObject) or duplicating (string) it
*/
GValueTypedCXX(const value_type &other) {
init(gType);
*this = other;
}
/**
* copy value, referencing (GObject) or duplicating (string) it
*/
GValueTypedCXX(constNativeType value) {
init(gType);
set(value);
}
/**
* copy (addRef = true) or take ownership of value during construction
*/
GValueTypedCXX(nativeType value, bool addRef) {
init(gType);
if (addRef) {
set(value);
} else {
take(value);
}
}
/** copy other value */
GValueCXX &operator = (const value_type &other) {
if (&other != this) {
g_value_copy(&other, this);
}
return *this;
}
/** copy other value */
GValueCXX &operator = (constNativeType other) {
set(other);
return *this;
}
/**
* set value, copying (string) or referencing (GObject) it if necessary
*/
void set(constNativeType other) {
setGValue(this, other);
}
/**
* store pointer to static instance which does not have to be copied or freed
* (like a const char * string)
*/
void setStatic(constNativeType other) {
setStaticInGValue(this, other);
}
/** transfer ownership of complex object (string, GObject) to GValue */
void take(nativeType other) {
takeIntoGValue(this, other);
}
/** access content without transfering ownership */
constNativeType get() const {
return getFromGValue(this);
}
};
/**
* Declares a C++ wrapper for a GValue containing a dynamically
* created GType. Uses g_value_set/get/take_boxed() with the necessary
* type casting.
*
* Example:
* typedef GValueDynTypedCXX<GDateTime *, g_date_time_get_type> GValueDateTimeCXX;
*/
template<
class nativeType,
GType (*gTypeFactory)()
> class GValueDynTypedCXX : public GValueCXX
{
public:
typedef GValueDynTypedCXX<nativeType, gTypeFactory> value_type;
/**
* prepare value, without setting it (isSet() will return false)
*/
GValueDynTypedCXX() {
init(gTypeFactory());
}
/**
* copy other value
*/
GValueDynTypedCXX(const value_type &other) {
init(gTypeFactory());
*this = other;
}
/**
* copy value, referencing (GObject) or duplicating (string) it
*/
GValueDynTypedCXX(const nativeType value) {
init(gTypeFactory());
set(value);
}
/**
* copy (addRef = true) or take ownership of value during construction
*/
GValueDynTypedCXX(nativeType value, bool addRef) {
init(gTypeFactory());
if (addRef) {
set(value);
} else {
take(value);
}
}
/** copy other value */
value_type &operator = (const value_type &other) {
if (&other != this) {
g_value_copy(&other, this);
}
return *this;
}
/** copy other value, referencing (GObject) or duplicating (string) it */
value_type &operator = (const nativeType other) {
set(other);
return *this;
}
/**
* set value, copying (string) or referencing (GObject) it if necessary
*/
void set(const nativeType other) {
g_value_set_boxed(this, other);
}
/**
* store pointer to static instance which does not have to be copied or freed
* (like a const char * string)
*/
void setStatic(const nativeType other) {
g_value_set_static_boxed(this, other);
}
/** transfer ownership of complex object (string, GObject) to GValue */
void take(nativeType other) {
g_value_take_boxed(this, other);
}
/** access content without transfering ownership */
const nativeType get() const {
return static_cast<const nativeType *>(g_value_get_boxed(this));
}
};
typedef GValueTypedCXX<gboolean, gboolean, G_TYPE_BOOLEAN, g_value_set_boolean, g_value_get_boolean> GValueBooleanCXX;
typedef GValueTypedCXX<gint8, gint8, G_TYPE_CHAR, g_value_set_schar, g_value_get_schar> GValueCharCXX;
typedef GValueTypedCXX<guchar, guchar, G_TYPE_UCHAR, g_value_set_uchar, g_value_get_uchar> GValueUCharCXX;
typedef GValueTypedCXX<gint, gint, G_TYPE_INT, g_value_set_int, g_value_get_int> GValueIntCXX;
typedef GValueTypedCXX<guint, guint, G_TYPE_UINT, g_value_set_uint, g_value_get_uint> GValueUIntCXX;
typedef GValueTypedCXX<glong, glong, G_TYPE_LONG, g_value_set_long, g_value_get_long> GValueLongCXX;
typedef GValueTypedCXX<gulong, gulong, G_TYPE_ULONG, g_value_set_ulong, g_value_get_ulong> GValueULongCXX;
typedef GValueTypedCXX<gint64, gint64, G_TYPE_INT64, g_value_set_int64, g_value_get_int64> GValueInt64CXX;
typedef GValueTypedCXX<guint64, guint64, G_TYPE_UINT64, g_value_set_uint64, g_value_get_uint64> GValueUInt64CXX;
typedef GValueTypedCXX<gfloat, gfloat, G_TYPE_FLOAT, g_value_set_float, g_value_get_float> GValueFloatCXX;
typedef GValueTypedCXX<gdouble, gdouble, G_TYPE_DOUBLE, g_value_set_double, g_value_get_double> GValueDoubleCXX;
typedef GValueTypedCXX<gint, gint, G_TYPE_ENUM, g_value_set_enum, g_value_get_enum> GValueEnumCXX;
typedef GValueTypedCXX<gboolean, gboolean, G_TYPE_BOOLEAN, g_value_set_boolean, g_value_get_boolean> GValueBooleanCXX;
typedef GValueTypedCXX<gchar *, const gchar *, G_TYPE_STRING, g_value_set_string, g_value_get_string, g_value_take_string, g_value_set_static_string> GValueStringCXX;
typedef GValueTypedCXX<gpointer, gpointer, G_TYPE_OBJECT, g_value_set_object, g_value_get_object, g_value_take_object> GValueObjectCXX;
SE_END_CXX
#endif // INCL_GVALUE_SUPPORT
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