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obs-StreamFX
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utility: Code for using enumerations as flags/bitsets 

It baffles me that this is not just part of the language itself from the beginning, it's used nearly everywhere and is needed for type safety.
This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2018-04-29 01:02:05 +02:00
parent 365b390e68
commit d59b54811f
3 changed files with 71 additions and 0 deletions
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2
CMakeLists.txt
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@ -112,6 +112,7 @@ SET(obs-stream-effects_HEADERS
"${PROJECT_SOURCE_DIR}/source/obs-audio-capture.h"
"${PROJECT_BINARY_DIR}/source/version.h"
"${PROJECT_SOURCE_DIR}/source/strings.h"
"${PROJECT_SOURCE_DIR}/source/utility.h"
"${PROJECT_SOURCE_DIR}/source/util-math.h"
"${PROJECT_SOURCE_DIR}/source/util-memory.h"
)
@ -135,6 +136,7 @@ SET(obs-stream-effects_SOURCES
"${PROJECT_SOURCE_DIR}/source/gs-vertex.cpp"
"${PROJECT_SOURCE_DIR}/source/gs-vertexbuffer.cpp"
"${PROJECT_SOURCE_DIR}/source/obs-audio-capture.cpp"
"${PROJECT_SOURCE_DIR}/source/utility.cpp"
"${PROJECT_SOURCE_DIR}/source/util-math.cpp"
"${PROJECT_SOURCE_DIR}/source/util-memory.cpp"
)

21
source/utility.cpp Normal file
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@ -0,0 +1,21 @@
/*
* Modern effects for a modern Streamer
* Copyright (C) 2018 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "utility.h"

48
source/utility.h Normal file
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@ -0,0 +1,48 @@
/*
* Modern effects for a modern Streamer
* Copyright (C) 2018 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#pragma once
#include <type_traits>
template<typename Enum>
struct enable_bitmask_operators {
static const bool enable = false;
};
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, Enum>::type
operator |(Enum lhs, Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum> (
static_cast<underlying>(lhs) |
static_cast<underlying>(rhs)
);
}
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, Enum>::type
operator &(Enum lhs, Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum> (
static_cast<underlying>(lhs) &
static_cast<underlying>(rhs)
);
}
#define ENABLE_BITMASK_OPERATORS(x) template<> struct enable_bitmask_operators<x> { static const bool enable = true; };