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84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (C) 2026 steredbits and Pelagia contributors
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#ifndef PELAGIA_PLATFORM_SDL_CONTROLLER_SET_H
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#define PELAGIA_PLATFORM_SDL_CONTROLLER_SET_H
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// Open gamepads, indexed by SDL instance id. Pure logic
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// (no SDL call): tested by tests/test_controller_set.cpp.
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//
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// All gamepads are opened and their events accepted: on PS5, the
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// SDL driver creates one joystick per user logged in on the console (not per
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// physical gamepad), and nothing guarantees that the first one is the one holding
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// the gamepad (finding on the console). Each gamepad keeps its
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// layout (PlayStation or not), which decides the role of START.
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#include <cstddef>
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#include <cstdint>
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#include <vector>
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namespace platform_sdl {
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template <typename Handle>
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class ControllerSet {
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public:
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struct Entry {
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int32_t instance_id = -1;
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Handle handle{};
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bool playstation = false;
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};
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bool contains(int32_t instance_id) const { return find(instance_id) != nullptr; }
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// Adds an open gamepad. False if the instance is already known (SDL also sends
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// an "added" event for the gamepads present at startup).
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bool add(int32_t instance_id, Handle handle, bool playstation) {
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if (contains(instance_id)) {
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return false;
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}
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Entry e;
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e.instance_id = instance_id;
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e.handle = handle;
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e.playstation = playstation;
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entries_.push_back(e);
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return true;
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}
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// Removes the gamepad; *handle receives the handle to close. False if unknown.
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bool remove(int32_t instance_id, Handle* handle) {
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for (size_t i = 0; i < entries_.size(); ++i) {
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if (entries_[i].instance_id == instance_id) {
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*handle = entries_[i].handle;
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entries_.erase(entries_.begin() + static_cast<std::ptrdiff_t>(i));
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return true;
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}
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}
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return false;
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}
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// Layout of the gamepad that emitted an event (false if unknown).
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bool playstation(int32_t instance_id) const {
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const Entry* e = find(instance_id);
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return e != nullptr && e->playstation;
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}
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size_t size() const { return entries_.size(); }
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const std::vector<Entry>& entries() const { return entries_; }
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void clear() { entries_.clear(); }
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private:
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const Entry* find(int32_t instance_id) const {
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for (const Entry& e : entries_) {
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if (e.instance_id == instance_id) {
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return &e;
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}
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}
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return nullptr;
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}
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std::vector<Entry> entries_;
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};
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} // namespace platform_sdl
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#endif // PELAGIA_PLATFORM_SDL_CONTROLLER_SET_H
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