FFlist: add new functions to make it be able to work as a queue

src/util/FFlist.c

@@ -1,6 +1,7 @@
 #include "FFlist.h"
 
 #include <stdlib.h>
+#include <memory.h>
 
 void ffListInitA(FFlist* list, uint32_t elementSize, uint32_t capacity)
 {
@@ -34,6 +35,27 @@ uint32_t ffListFirstIndexComp(const FFlist* list, void* compElement, bool(*compF
     return list->length;
 }
 
+bool ffListShift(FFlist* list, void* result)
+{
+    if(list->length == 0)
+        return false;
+
+    memcpy(result, list->data, list->elementSize);
+    memmove(list->data, list->data + list->elementSize, list->elementSize * (list->length - 1));
+    --list->length;
+    return true;
+}
+
+bool ffListPop(FFlist* list, void* result)
+{
+    if(list->length == 0)
+        return false;
+
+    memcpy(result, ffListGet(list, list->length - 1), list->elementSize);
+    --list->length;
+    return result;
+}
+
 void ffListDestroy(FFlist* list)
 {
     //Avoid free-after-use. These 3 assignments are cheap so don't remove them

src/util/FFlist.h

@@ -26,6 +26,11 @@ void* ffListAdd(FFlist* list);
 
 FF_C_NODISCARD uint32_t ffListFirstIndexComp(const FFlist* list, void* compElement, bool(*compFunc)(const void*, const void*));
 
+// Removes the first element, and copy its value to `*result`
+bool ffListShift(FFlist* list, void* result);
+// Removes the last element, and copy its value to `*result`
+bool ffListPop(FFlist* list, void* result);
+
 void ffListDestroy(FFlist* list);
 
 static inline void ffListInit(FFlist* list, uint32_t elementSize)