+++ /dev/null
-//========================================================================
-// GLFW 3.4 Linux - www.glfw.org
-//------------------------------------------------------------------------
-// Copyright (c) 2002-2006 Marcus Geelnard
-// Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-//
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-//
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would
-// be appreciated but is not required.
-//
-// 2. Altered source versions must be plainly marked as such, and must not
-// be misrepresented as being the original software.
-//
-// 3. This notice may not be removed or altered from any source
-// distribution.
-//
-//========================================================================
-// It is fine to use C99 in this file because it will not be built with VS
-//========================================================================
-
-#include "internal.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/inotify.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <dirent.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#ifndef SYN_DROPPED // < v2.6.39 kernel headers
-// Workaround for CentOS-6, which is supported till 2020-11-30, but still on v2.6.32
-#define SYN_DROPPED 3
-#endif
-
-// Apply an EV_KEY event to the specified joystick
-//
-static void handleKeyEvent(_GLFWjoystick* js, int code, int value)
-{
- _glfwInputJoystickButton(js,
- js->linjs.keyMap[code - BTN_MISC],
- value ? GLFW_PRESS : GLFW_RELEASE);
-}
-
-// Apply an EV_ABS event to the specified joystick
-//
-static void handleAbsEvent(_GLFWjoystick* js, int code, int value)
-{
- const int index = js->linjs.absMap[code];
-
- if (code >= ABS_HAT0X && code <= ABS_HAT3Y)
- {
- static const char stateMap[3][3] =
- {
- { GLFW_HAT_CENTERED, GLFW_HAT_UP, GLFW_HAT_DOWN },
- { GLFW_HAT_LEFT, GLFW_HAT_LEFT_UP, GLFW_HAT_LEFT_DOWN },
- { GLFW_HAT_RIGHT, GLFW_HAT_RIGHT_UP, GLFW_HAT_RIGHT_DOWN },
- };
-
- const int hat = (code - ABS_HAT0X) / 2;
- const int axis = (code - ABS_HAT0X) % 2;
- int* state = js->linjs.hats[hat];
-
- // NOTE: Looking at several input drivers, it seems all hat events use
- // -1 for left / up, 0 for centered and 1 for right / down
- if (value == 0)
- state[axis] = 0;
- else if (value < 0)
- state[axis] = 1;
- else if (value > 0)
- state[axis] = 2;
-
- _glfwInputJoystickHat(js, index, stateMap[state[0]][state[1]]);
- }
- else
- {
- const struct input_absinfo* info = &js->linjs.absInfo[code];
- float normalized = value;
-
- const int range = info->maximum - info->minimum;
- if (range)
- {
- // Normalize to 0.0 -> 1.0
- normalized = (normalized - info->minimum) / range;
- // Normalize to -1.0 -> 1.0
- normalized = normalized * 2.0f - 1.0f;
- }
-
- _glfwInputJoystickAxis(js, index, normalized);
- }
-}
-
-// Poll state of absolute axes
-//
-static void pollAbsState(_GLFWjoystick* js)
-{
- for (int code = 0; code < ABS_CNT; code++)
- {
- if (js->linjs.absMap[code] < 0)
- continue;
-
- struct input_absinfo* info = &js->linjs.absInfo[code];
-
- if (ioctl(js->linjs.fd, EVIOCGABS(code), info) < 0)
- continue;
-
- handleAbsEvent(js, code, info->value);
- }
-}
-
-#define isBitSet(bit, arr) (arr[(bit) / 8] & (1 << ((bit) % 8)))
-
-// Attempt to open the specified joystick device
-//
-static GLFWbool openJoystickDevice(const char* path)
-{
- for (int jid = 0; jid <= GLFW_JOYSTICK_LAST; jid++)
- {
- if (!_glfw.joysticks[jid].present)
- continue;
- if (strcmp(_glfw.joysticks[jid].linjs.path, path) == 0)
- return GLFW_FALSE;
- }
-
- _GLFWjoystickLinux linjs = {0};
- linjs.fd = open(path, O_RDONLY | O_NONBLOCK);
- if (linjs.fd == -1)
- return GLFW_FALSE;
-
- char evBits[(EV_CNT + 7) / 8] = {0};
- char keyBits[(KEY_CNT + 7) / 8] = {0};
- char absBits[(ABS_CNT + 7) / 8] = {0};
- struct input_id id;
-
- if (ioctl(linjs.fd, EVIOCGBIT(0, sizeof(evBits)), evBits) < 0 ||
- ioctl(linjs.fd, EVIOCGBIT(EV_KEY, sizeof(keyBits)), keyBits) < 0 ||
- ioctl(linjs.fd, EVIOCGBIT(EV_ABS, sizeof(absBits)), absBits) < 0 ||
- ioctl(linjs.fd, EVIOCGID, &id) < 0)
- {
- _glfwInputError(GLFW_PLATFORM_ERROR,
- "Linux: Failed to query input device: %s",
- strerror(errno));
- close(linjs.fd);
- return GLFW_FALSE;
- }
-
- // Ensure this device supports the events expected of a joystick
- if (!isBitSet(EV_KEY, evBits) || !isBitSet(EV_ABS, evBits))
- {
- close(linjs.fd);
- return GLFW_FALSE;
- }
-
- char name[256] = "";
-
- if (ioctl(linjs.fd, EVIOCGNAME(sizeof(name)), name) < 0)
- strncpy(name, "Unknown", sizeof(name));
-
- char guid[33] = "";
-
- // Generate a joystick GUID that matches the SDL 2.0.5+ one
- if (id.vendor && id.product && id.version)
- {
- sprintf(guid, "%02x%02x0000%02x%02x0000%02x%02x0000%02x%02x0000",
- id.bustype & 0xff, id.bustype >> 8,
- id.vendor & 0xff, id.vendor >> 8,
- id.product & 0xff, id.product >> 8,
- id.version & 0xff, id.version >> 8);
- }
- else
- {
- sprintf(guid, "%02x%02x0000%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x00",
- id.bustype & 0xff, id.bustype >> 8,
- name[0], name[1], name[2], name[3],
- name[4], name[5], name[6], name[7],
- name[8], name[9], name[10]);
- }
-
- int axisCount = 0, buttonCount = 0, hatCount = 0;
-
- for (int code = BTN_MISC; code < KEY_CNT; code++)
- {
- if (!isBitSet(code, keyBits))
- continue;
-
- linjs.keyMap[code - BTN_MISC] = buttonCount;
- buttonCount++;
- }
-
- for (int code = 0; code < ABS_CNT; code++)
- {
- linjs.absMap[code] = -1;
- if (!isBitSet(code, absBits))
- continue;
-
- if (code >= ABS_HAT0X && code <= ABS_HAT3Y)
- {
- linjs.absMap[code] = hatCount;
- hatCount++;
- // Skip the Y axis
- code++;
- }
- else
- {
- if (ioctl(linjs.fd, EVIOCGABS(code), &linjs.absInfo[code]) < 0)
- continue;
-
- linjs.absMap[code] = axisCount;
- axisCount++;
- }
- }
-
- _GLFWjoystick* js =
- _glfwAllocJoystick(name, guid, axisCount, buttonCount, hatCount);
- if (!js)
- {
- close(linjs.fd);
- return GLFW_FALSE;
- }
-
- strncpy(linjs.path, path, sizeof(linjs.path) - 1);
- memcpy(&js->linjs, &linjs, sizeof(linjs));
-
- pollAbsState(js);
-
- _glfwInputJoystick(js, GLFW_CONNECTED);
- return GLFW_TRUE;
-}
-
-#undef isBitSet
-
-// Frees all resources associated with the specified joystick
-//
-static void closeJoystick(_GLFWjoystick* js)
-{
- close(js->linjs.fd);
- _glfwFreeJoystick(js);
- _glfwInputJoystick(js, GLFW_DISCONNECTED);
-}
-
-// Lexically compare joysticks by name; used by qsort
-//
-static int compareJoysticks(const void* fp, const void* sp)
-{
- const _GLFWjoystick* fj = fp;
- const _GLFWjoystick* sj = sp;
- return strcmp(fj->linjs.path, sj->linjs.path);
-}
-
-
-//////////////////////////////////////////////////////////////////////////
-////// GLFW internal API //////
-//////////////////////////////////////////////////////////////////////////
-
-void _glfwDetectJoystickConnectionLinux(void)
-{
- if (_glfw.linjs.inotify <= 0)
- return;
-
- ssize_t offset = 0;
- char buffer[16384];
- const ssize_t size = read(_glfw.linjs.inotify, buffer, sizeof(buffer));
-
- while (size > offset)
- {
- regmatch_t match;
- const struct inotify_event* e = (struct inotify_event*) (buffer + offset);
-
- offset += sizeof(struct inotify_event) + e->len;
-
- if (regexec(&_glfw.linjs.regex, e->name, 1, &match, 0) != 0)
- continue;
-
- char path[PATH_MAX];
- snprintf(path, sizeof(path), "/dev/input/%s", e->name);
-
- if (e->mask & (IN_CREATE | IN_ATTRIB))
- openJoystickDevice(path);
- else if (e->mask & IN_DELETE)
- {
- for (int jid = 0; jid <= GLFW_JOYSTICK_LAST; jid++)
- {
- if (strcmp(_glfw.joysticks[jid].linjs.path, path) == 0)
- {
- closeJoystick(_glfw.joysticks + jid);
- break;
- }
- }
- }
- }
-}
-
-
-//////////////////////////////////////////////////////////////////////////
-////// GLFW platform API //////
-//////////////////////////////////////////////////////////////////////////
-
-GLFWbool _glfwPlatformInitJoysticks(void)
-{
- const char* dirname = "/dev/input";
-
- _glfw.linjs.inotify = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
- if (_glfw.linjs.inotify > 0)
- {
- // HACK: Register for IN_ATTRIB to get notified when udev is done
- // This works well in practice but the true way is libudev
-
- _glfw.linjs.watch = inotify_add_watch(_glfw.linjs.inotify,
- dirname,
- IN_CREATE | IN_ATTRIB | IN_DELETE);
- }
-
- // Continue without device connection notifications if inotify fails
-
- if (regcomp(&_glfw.linjs.regex, "^event[0-9]\\+$", 0) != 0)
- {
- _glfwInputError(GLFW_PLATFORM_ERROR, "Linux: Failed to compile regex");
- return GLFW_FALSE;
- }
-
- int count = 0;
-
- DIR* dir = opendir(dirname);
- if (dir)
- {
- struct dirent* entry;
-
- while ((entry = readdir(dir)))
- {
- regmatch_t match;
-
- if (regexec(&_glfw.linjs.regex, entry->d_name, 1, &match, 0) != 0)
- continue;
-
- char path[PATH_MAX];
-
- snprintf(path, sizeof(path), "%s/%s", dirname, entry->d_name);
-
- if (openJoystickDevice(path))
- count++;
- }
-
- closedir(dir);
- }
-
- // Continue with no joysticks if enumeration fails
-
- qsort(_glfw.joysticks, count, sizeof(_GLFWjoystick), compareJoysticks);
- return GLFW_TRUE;
-}
-
-void _glfwPlatformTerminateJoysticks(void)
-{
- int jid;
-
- for (jid = 0; jid <= GLFW_JOYSTICK_LAST; jid++)
- {
- _GLFWjoystick* js = _glfw.joysticks + jid;
- if (js->present)
- closeJoystick(js);
- }
-
- if (_glfw.linjs.inotify > 0)
- {
- if (_glfw.linjs.watch > 0)
- inotify_rm_watch(_glfw.linjs.inotify, _glfw.linjs.watch);
-
- close(_glfw.linjs.inotify);
- regfree(&_glfw.linjs.regex);
- }
-}
-
-int _glfwPlatformPollJoystick(_GLFWjoystick* js, int mode)
-{
- // Read all queued events (non-blocking)
- for (;;)
- {
- struct input_event e;
-
- errno = 0;
- if (read(js->linjs.fd, &e, sizeof(e)) < 0)
- {
- // Reset the joystick slot if the device was disconnected
- if (errno == ENODEV)
- closeJoystick(js);
-
- break;
- }
-
- if (e.type == EV_SYN)
- {
- if (e.code == SYN_DROPPED)
- _glfw.linjs.dropped = GLFW_TRUE;
- else if (e.code == SYN_REPORT)
- {
- _glfw.linjs.dropped = GLFW_FALSE;
- pollAbsState(js);
- }
- }
-
- if (_glfw.linjs.dropped)
- continue;
-
- if (e.type == EV_KEY)
- handleKeyEvent(js, e.code, e.value);
- else if (e.type == EV_ABS)
- handleAbsEvent(js, e.code, e.value);
- }
-
- return js->present;
-}
-
-void _glfwPlatformUpdateGamepadGUID(char* guid)
-{
-}
-
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