Replace most uses of Map by HashMap

* Map is unnecessary and inefficient in almost every case.
* Replaced by the new HashMap.
* Renamed Map to RBMap and Set to RBSet for cases that still make sense
  (order matters) but use is discouraged.

There were very few cases where replacing by HashMap was undesired because
keeping the key order was intended.
I tried to keep those (as RBMap) as much as possible, but might have missed
some. Review appreciated!

1 files changed, 14 insertions, 17 deletions

diff --git a/core/io/file_access_pack.h b/core/io/file_access_pack.h
index 17e87c835a..404ad38c96 100644
--- a/core/io/file_access_pack.h
+++ b/core/io/file_access_pack.h
@@ -35,8 +35,8 @@
 #include "core/io/file_access.h"
 #include "core/string/print_string.h"
 #include "core/templates/list.h"
-#include "core/templates/map.h"
-#include "core/templates/set.h"
+#include "core/templates/rb_map.h"
+#include "core/templates/rb_set.h"
 
 // Godot's packed file magic header ("GDPC" in ASCII).
 #define PACK_HEADER_MAGIC 0x43504447
@@ -72,23 +72,20 @@ private:
 	struct PackedDir {
 		PackedDir *parent = nullptr;
 		String name;
-		Map<String, PackedDir *> subdirs;
-		Set<String> files;
+		HashMap<String, PackedDir *> subdirs;
+		RBSet<String> files;
 	};
 
 	struct PathMD5 {
 		uint64_t a = 0;
 		uint64_t b = 0;
-		bool operator<(const PathMD5 &p_md5) const {
-			if (p_md5.a == a) {
-				return b < p_md5.b;
-			} else {
-				return a < p_md5.a;
-			}
-		}
 
-		bool operator==(const PathMD5 &p_md5) const {
-			return a == p_md5.a && b == p_md5.b;
+		bool operator==(const PathMD5 &p_val) const {
+			return (a == p_val.a) && (b == p_val.b);
+		}
+		static uint32_t hash(const PathMD5 &p_val) {
+			uint32_t h = hash_djb2_one_32(p_val.a);
+			return hash_djb2_one_32(p_val.b, h);
 		}
 
 		PathMD5() {}
@@ -99,7 +96,7 @@ private:
 		}
 	};
 
-	Map<PathMD5, PackedFile> files;
+	HashMap<PathMD5, PackedFile, PathMD5> files;
 
 	Vector<PackSource *> sources;
 
@@ -186,15 +183,15 @@ public:
 
 Ref<FileAccess> PackedData::try_open_path(const String &p_path) {
 	PathMD5 pmd5(p_path.md5_buffer());
-	Map<PathMD5, PackedFile>::Element *E = files.find(pmd5);
+	HashMap<PathMD5, PackedFile, PathMD5>::Iterator E = files.find(pmd5);
 	if (!E) {
 		return nullptr; //not found
 	}
-	if (E->get().offset == 0) {
+	if (E->value.offset == 0) {
 		return nullptr; //was erased
 	}
 
-	return E->get().src->get_file(p_path, &E->get());
+	return E->value.src->get_file(p_path, &E->value);
 }
 
 bool PackedData::has_path(const String &p_path) {