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Sort initial joystick set on Linux

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Fixes #654.
This commit is contained in:
Camilla Berglund 2015-12-15 04:16:20 +01:00
parent 6b0f660180
commit ec9fe02a30
1 changed files with 21 additions and 9 deletions
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30
src/linux_joystick.c
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@ -45,7 +45,7 @@
// Attempt to open the specified joystick device
//
static void openJoystickDevice(const char* path)
static GLFWbool openJoystickDevice(const char* path)
{
#if defined(__linux__)
char axisCount, buttonCount;
@ -59,7 +59,7 @@ static void openJoystickDevice(const char* path)
continue;
if (strcmp(_glfw.linux_js.js[joy].path, path) == 0)
return;
return GLFW_FALSE;
}
for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++)
@ -69,11 +69,11 @@ static void openJoystickDevice(const char* path)
}
if (joy > GLFW_JOYSTICK_LAST)
return;
return GLFW_FALSE;
fd = open(path, O_RDONLY | O_NONBLOCK);
if (fd == -1)
return;
return GLFW_FALSE;
// Verify that the joystick driver version is at least 1.0
ioctl(fd, JSIOCGVERSION, &version);
@ -81,13 +81,14 @@ static void openJoystickDevice(const char* path)
{
// It's an old 0.x interface (we don't support it)
close(fd);
return;
return GLFW_FALSE;
}
if (ioctl(fd, JSIOCGNAME(sizeof(name)), name) < 0)
strncpy(name, "Unknown", sizeof(name));
js = _glfw.linux_js.js + joy;
js->present = GLFW_TRUE;
js->name = strdup(name);
js->path = strdup(path);
js->fd = fd;
@ -99,9 +100,8 @@ static void openJoystickDevice(const char* path)
ioctl(fd, JSIOCGBUTTONS, &buttonCount);
js->buttonCount = (int) buttonCount;
js->buttons = calloc(buttonCount, 1);
js->present = GLFW_TRUE;
#endif // __linux__
return GLFW_TRUE;
}
// Polls for and processes events the specified joystick
@ -166,6 +166,15 @@ static GLFWbool pollJoystickEvents(_GLFWjoystickLinux* js)
return js->present;
}
// Lexically compare the specified joysticks by device paths
//
static int compareJoysticks(const void* fp, const void* sp)
{
const _GLFWjoystickLinux* fj = fp;
const _GLFWjoystickLinux* sj = sp;
return strcmp(fj->path, sj->path);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
@ -176,8 +185,9 @@ static GLFWbool pollJoystickEvents(_GLFWjoystickLinux* js)
GLFWbool _glfwInitJoysticksLinux(void)
{
#if defined(__linux__)
const char* dirname = "/dev/input";
DIR* dir;
int count = 0;
const char* dirname = "/dev/input";
_glfw.linux_js.inotify = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
if (_glfw.linux_js.inotify == -1)
@ -223,7 +233,8 @@ GLFWbool _glfwInitJoysticksLinux(void)
continue;
snprintf(path, sizeof(path), "%s/%s", dirname, entry->d_name);
openJoystickDevice(path);
if (openJoystickDevice(path))
count++;
}
closedir(dir);
@ -237,6 +248,7 @@ GLFWbool _glfwInitJoysticksLinux(void)
// Continue with no joysticks detected
}
qsort(_glfw.linux_js.js, count, sizeof(_GLFWjoystickLinux), compareJoysticks);
#endif // __linux__
return GLFW_TRUE;