Make monitor and joystick names static strings

Related to #478.

(cherry picked from commit da236ba807b73fb8050e52f1f1450266e7529659)

src/cocoa_monitor.m

@@ -63,7 +63,7 @@ static char* getMonitorName(CGDirectDisplayID displayID, NSScreen* screen)
                                      &it) != 0)
     {
         // This may happen if a desktop Mac is running headless
-        return NULL;
+        return _glfw_strdup("Display");
     }
 
     while ((service = IOIteratorNext(it)) != 0)
@@ -101,7 +101,7 @@ static char* getMonitorName(CGDirectDisplayID displayID, NSScreen* screen)
     {
         _glfwInputError(GLFW_PLATFORM_ERROR,
                         "Cocoa: Failed to find service port for display");
-        return NULL;
+        return _glfw_strdup("Display");
     }
 
     CFDictionaryRef names =
@@ -114,7 +114,7 @@ static char* getMonitorName(CGDirectDisplayID displayID, NSScreen* screen)
     {
         // This may happen if a desktop Mac is running headless
         CFRelease(info);
-        return NULL;
+        return _glfw_strdup("Display");
     }
 
     const CFIndex size =
@@ -356,7 +356,7 @@ void _glfwPollMonitorsNS(void)
         const CGSize size = CGDisplayScreenSize(displays[i]);
         char* name = getMonitorName(displays[i], screen);
         if (!name)
-            name = _glfw_strdup("Unknown");
+            continue;
 
         _GLFWmonitor* monitor = _glfwAllocMonitor(name, size.width, size.height);
         monitor->ns.displayID  = displays[i];

src/input.c

@@ -430,7 +430,6 @@ _GLFWjoystick* _glfwAllocJoystick(const char* name,
 
     js = _glfw.joysticks + jid;
     js->present     = GLFW_TRUE;
-    js->name        = _glfw_strdup(name);
     js->axes        = calloc(axisCount, sizeof(float));
     js->buttons     = calloc(buttonCount + (size_t) hatCount * 4, 1);
     js->hats        = calloc(hatCount, 1);
@@ -438,6 +437,7 @@ _GLFWjoystick* _glfwAllocJoystick(const char* name,
     js->buttonCount = buttonCount;
     js->hatCount    = hatCount;
 
+    strncpy(js->name, name, sizeof(js->name) - 1);
     strncpy(js->guid, guid, sizeof(js->guid) - 1);
     js->mapping = findValidMapping(js);
 
@@ -448,7 +448,6 @@ _GLFWjoystick* _glfwAllocJoystick(const char* name,
 //
 void _glfwFreeJoystick(_GLFWjoystick* js)
 {
-    free(js->name);
     free(js->axes);
     free(js->buttons);
     free(js->hats);

src/internal.h

@@ -423,7 +423,7 @@ struct _GLFWwindow
 //
 struct _GLFWmonitor
 {
-    char*           name;
+    char            name[128];
     void*           userPointer;
 
     // Physical dimensions in millimeters.
@@ -484,7 +484,7 @@ struct _GLFWjoystick
     int             buttonCount;
     unsigned char*  hats;
     int             hatCount;
-    char*           name;
+    char            name[128];
     void*           userPointer;
     char            guid[33];
     _GLFWmapping*   mapping;

src/monitor.c

@@ -170,8 +170,7 @@ _GLFWmonitor* _glfwAllocMonitor(const char* name, int widthMM, int heightMM)
     monitor->widthMM = widthMM;
     monitor->heightMM = heightMM;
 
-    if (name)
-        monitor->name = _glfw_strdup(name);
+    strncpy(monitor->name, name, sizeof(monitor->name) - 1);
 
     return monitor;
 }
@@ -189,7 +188,6 @@ void _glfwFreeMonitor(_GLFWmonitor* monitor)
     _glfwFreeGammaArrays(&monitor->currentRamp);
 
     free(monitor->modes);
-    free(monitor->name);
     free(monitor);
 }
 

src/wl_monitor.c

@@ -47,15 +47,13 @@ static void outputHandleGeometry(void* data,
                                  int32_t transform)
 {
     struct _GLFWmonitor *monitor = data;
-    char name[1024];
 
     monitor->wl.x = x;
     monitor->wl.y = y;
     monitor->widthMM = physicalWidth;
     monitor->heightMM = physicalHeight;
 
-    snprintf(name, sizeof(name), "%s %s", make, model);
-    monitor->name = _glfw_strdup(name);
+    snprintf(monitor->name, sizeof(monitor->name), "%s %s", make, model);
 }
 
 static void outputHandleMode(void* data,
@@ -133,7 +131,7 @@ void _glfwAddOutputWayland(uint32_t name, uint32_t version)
     }
 
     // The actual name of this output will be set in the geometry handler.
-    monitor = _glfwAllocMonitor(NULL, 0, 0);
+    monitor = _glfwAllocMonitor("", 0, 0);
 
     output = wl_registry_bind(_glfw.wl.registry,
                               name,